Scientific Data Documentation
Vision, Ages 6 - 74 years (1982-1984)
DSN: CC37.HSPHANES.VISION
ABSTRACT
Introduction
Hispanic Health and Nutrition Examination Survey
Mexican Americans
Cuban Americans
Puerto Ricans
The Hispanic Health and Nutrition Examination Survey (HHANES) was conducted
from July 1982 through December 1984. The data on the tape documented here
are from all three portions of the survey:
Mexican Americans
Residing in selected counties of Texas, Colorado, New Mexico,
Arizona, and California
Surveyed from July 1982 through November 1983
9,894 persons sampled; 8,554 interviewed; 7,462 examined
Cuban Americans
Residing in Dade County (Miami), Florida
Surveyed from January 1984 through April 1984
2,244 persons sampled; 1,766 interviewed; 1,357 examined
Puerto Ricans
Residing in New York City area, including parts of New Jersey
and Connecticut
Surveyed from May 1984 through December 1984
3,786 persons sampled; 3,369 interviewed; 2,834 examined
Caution Notice
C A U T I O N
BEFORE USING THIS DATA TAPE, PLEASE READ THIS PAGE.
* Read the accompanying description of the survey, "The Plan and Operation
of the Hispanic Health and Nutrition Examination Survey", DHHS
Publication No. (PHS) 85-1321 before conducting analyses of the data on
this tape.
* Two aspects of HHANES, especially, should be taken into account when
conducting any analyses: the sample weights and the complex survey
design.
* Analyses should not be conducted on data combined from the three portions
of the survey (Mexican-American, Cuban-American, Puerto Rican).
* HHANES is a survey of Hispanic households and some of the sample persons
included on this tape are not of Hispanic origin. A detailed description
of the data codes dealing with national origin or ancestry appears in the
NOTES section of this document.
* Examine the range and frequency of values of a variable before conducting
an analyses of data. The range may include unusual or unexpected
values. The frequency counts may be useful to determine which analyses
may be worthwhile.
* Language of interview, which may appear several places on this tape, can
vary depending on the questionnaire (several used in the survey) and on
whether the response was provided by the sample person or by a proxy.
* For some data items, reference is made to a note. The notes (in a
separate section of this document) may be very important in data
analyses. Attention to them is strongly urged.
This Public Use Data Tape has been edited very carefully. Numerous
consistency and other checks were also performed. Nevertheless, due
especially to the large number of data items, some errors may have gone
undetected.
Please bring to the attention of NCHS any errors in the data tape or the
documentation. Errata sheets will be sent to people who have purchased the
data tapes and corrections will be made to subsequently released data tapes.
In publications, please acknowledge NCHS as the original data source. The
acknowledgment should include a disclaimer crediting the authors for
analyses, interpretations, and conclusions; NCHS should be cited as being
responsible for only the collection and processing of the data. In
addition, NCHS requests that the acronym HHANES be placed in the abstracts
of journal articles and other publications based on data from this survey in
order to facilitate the retrieval of such materials through automated
bibliographic searches. Please send reprints of journal articles and other
publications that include data from this tape to NCHS.
Division of Health Examination Statistics
National Center for Health Statistics
Center Building, Room 2-58
3700 East-West Highway
Hyattsville, MD 20782
Public Use Data Tapes for the Hispanic Health and Nutrition Examination
Survey will be released through the National Technical Information Service
(NTIS) as soon as the data have been edited, validated, and documented. A
list of NCHS Public Use Data Tapes that can be purchased from NTIS may be
obtained by writing the Scientific and Technical Information Branch, NCHS.
Scientific and Technical Information Branch
National Center for Health Statistics
Center Building, Room 1-57
3700 East-West Highway
Hyattsville, MD 20782
301-436-8500
BACKGROUND
Introduction
The National Center for Health Statistics (NCHS) collects, analyzes, and
disseminates data on the health status of Americans. The results of
surveys, analyses, and studies are made known primarily through publications
and the release of computer data tapes. This document contains details
required to guide programmers, statistical analysts, and research scientists
in the use of a Public Use Data Tape.
From 1960 through 1980 NCHS conducted five population-based, national health
examination surveys. Each survey involved collecting data by direct
physical examination, the taking of a medical history, and laboratory and
clinical tests and measurements. Questionnaires and examination components
have been designed to obtain and support analyses of data on certain
targeted conditions such as diabetes, hypertension, and anemia. Beginning
with the first National Health and Nutrition Examination Survey (NHANES I) a
nutrition component was added to obtain information on nutritional status
and dietary practices. The numbers of Hispanics in these samples were,
however, insufficient to enable adequate estimation of their health
conditions. From 1982 through 1984 a Hispanic Health and Nutrition
Examination Survey (HHANES) was conducted to obtain data on the health and
nutritional status of three Hispanic groups: Mexican Americans from Texas,
Colorado, New Mexico, Arizona, and California; Cuban Americans from Dade
County, Florida; and Puerto Ricans from the New York City area, including
parts of New Jersey and Connecticut.
The general structure of the HHANES sample design was similar to that of the
previous National Health and Nutrition Examination Surveys. All of these
studies have used complex, multistage, stratified, clustered samples of
defined populations. The major difference between HHANES and the previous
surveys is that HHANES was a survey of three special subgroups of the
population in selected areas of the United States rather than a national
probability sample. A detailed presentation of the design specifications is
found in Chapter 5 of "Plan and Operation of the Hispanic Health and
Nutrition Examination Survey, 1982-84" (Ref. No. 1).
Data collection began with a household interview. Several questionnaires
were administered:
* A Household Screener Questionnaire (HSQ), administered at each
selected address, for determining household eligibility and for
selecting sample persons.
* A Family Questionnaire (FQ), administered once for each family
containing sample persons, which included sections on family
relationships, basic demographic information for sample persons and
head of family, Medicare and health insurance coverage, participation
in income assistance programs, and housing characteristics.
* An Adult Sample Person Questionnaire (ASPQ), for persons 12 through
74 years which, depending on age, included sections on health status
measures, health services utilization, smoking (20 through 74 years),
meal program participation, and acculturation. Information on the
use of medicines and vitamins in the past two weeks was also obtained.
* A Child Sample Person Questionnaire (CSPQ), for sample persons 6
months through 11 years which included sections on a number of health
status issues, health care utilization, infant feeding practices,
participation in meal programs, school attendance, and language use.
Information on the use of medicines and vitamins in the past two
weeks was also obtained.
At the Mobile Examination Center two questionnaires were administered and an
examination performed:
* An Adult Sample Person Supplement (ASPS), for sample persons 12
through 74 years, which included sections on alcohol consumption,
drug abuse, depression, smoking (12 through 19 years), pesticide
exposure, and reproductive history.
* A Dietary Questionnaire (DQ), for persons 6 months through 74 years,
by which trained dietary interviewers collected information about
"usual" consumption habits and dietary practices, and recorded foods
consumed 24-hours prior to midnight of the interview.
* An examination which included a variety of tests and procedures. Age
at interview and other factors determined which procedures were
administered to which examinees. A dentist performed a dental
examination and a vision test. Technicians took blood and urine
specimens and administered a glucose tolerance test, X-rays,
electrocardiograms, and ultrasonographs of the gallbladder.
Technicians also performed hearing tests and took a variety of body
measurements. A physician performed a medical examination focusing
especially on the cardiovascular, gastrointestinal, neurological, and
musculoskeletal systems. The physician's impression of overall
health, nutritional and weight status, and health care needs were
also recorded. Some blood and urine specimen analyses were performed
by technicians in the examination center; others were conducted under
contract at various laboratories.
Because the HHANES sample is not a simple random one, it is necessary to
incorporate sample weights for proper analysis of the data. These sample
weights are a composite of individual selection probabilities, adjustments
for noncoverage and nonresponse, and poststratification adjustments. The
HHANES sample weights, which are necessary for the calculation of point
estimates, are located on all data tapes in positions 184-213. Because of
the complex sample design and the ratio adjustments used to produce the
sample weights, commonly used methods of point and variance estimation and
hypothesis testing which assume simple random sampling may give misleading
results. In order to provide users with the capability of estimating the
complex sample variances in the HHANES data, Strata and Pseudo Primary
Sampling Unit (PSU) codes have been provided on all data tapes in positions
214-217. These codes and the sample weights are necessary for the
calculation of variances.
There are computer programs available designed for variance estimation for
complex sample designs. The balanced repeated replication approach (Ref.
No. 2) is used in &REPERR and a linearization approach is used in &PSALMS to
calculate variance-covariance matrixes. Both routines are available within
the OSIRIS IV library (Ref. No. 3). SURREGR (Ref. No. 4) and SUPERCARP
(Ref. No. 5) are programs that calculate variance-covariance matrixes using
a linearization approach (Ref. No. 6) (Taylor series expansion). Another
program, SESUDAAN (Ref. No. 7) calculates standard errors, variances, and
design effects. (Note: This version of SESUDAAN should not be used to
obtain variances for totals.) SURREGR and SESUDAAN are special procedures
which run data under the SAS system (Ref. No. 8).
Even though the total number of examined persons in this survey is quite
large, subclass analyses can lead to estimates that are unstable,
particularly estimates of variances. Consequently, analysis of subclasses
require that the user pay particular attention to the number of sample
persons in the subclass and the number of PSU's that contain at least one
sample person in the subclass. Small sample sizes, or a small number of
PSU's used in the variance calculations, may produce unstable estimates of
the variances.
A more complete discussion of these issues and possible analytic strategies
for examining various hypotheses is presented in Chapter 11 of "Plan and
Operation of the Hispanic Health and Nutrition Examination Survey, 1982-84"
(Ref. No. 1) and in an earlier NCHS methodology (Series 2) publication (Ref.
No. 9).
Some users, however, may not have access to the computer programs for
estimating complex sample variances or may want to do their preliminary
analyses without using them. In addition, variance estimates calculated
from HHANES data through use of the programs described previously are likely
to be unstable because there were so few sample areas for each portion of
HHANES. This instability is not due to there being too few people in the
sample but may be due to the fact that the sample was selected from
relatively few areas. Therefore, the following discussion is designed to
provide an alternative approach to deal with the unavailability of software
and the small number of PSU's. The approach is based on using average
design effects (Ref. No. 10).
The design effect, defined as the ratio of the variance of a statistic from
a complex sample to the variance of the same statistic from a simple random
sample of the same size, that is,
DESIGN EFFECT (DEFF) = COMPLEX SAMPLE VARIANCE
-------------------------------
SIMPLE RANDOM SAMPLE VARIANCE
is often used to show the impact of the complex sample design on variances.
If the design effect is near 1, the complex sample design has little effect
on the variances and the user could consider assuming simple random sampling
for the analysis.
Some illustrative design effects for HHANES data on this tape are given in
the following tables. The design effects in the tables are the average for
the age groups usually presented in NCHS Series 11 publications. If the
average design effect for a subgroup was less than 1.0 (implying an
improvement over simple random sampling), it was coded as 1.0.
The following guidelines were used in the calculation of the average design
effects:
1. Exclude all persons of non-Hispanic origin,
2. Exclude all estimates for large age ranges, such as all ages
combined or 'all adults', and
3. Exclude all estimates where the proportion of the subpopulation with
the specific characteristic or condition was zero percent or one
hundred percent.
Design effects tend to be larger when age groups are combined, just as they
are when the sexes are combined, as shown in the tables. The data in the
tables give the user an idea of the range in design effects for selected
response variables from this data tape. If a response variable is not one
shown in the tables take the range into account; it is possible that a user
could have one of the higher, rather than one of the lower, design effects.
Suppose, for example, that of the 1,438 Mexican-Americans ages 6-11 years,
1,106 or 77 percent have binocular distance vision acuity without correction
of 20/20 or better.
Assuming simple random sampling, the variance for the percent is calculated
by converting the percent to a proportion and using the standard formula for
the variance of a proportion.
V = pq
--
n
This variance (V) multiplied by the design effect (DEFF) provides an
estimate of the variance from a complex sample of the same sample size (n).
In the example above,
(.77) (.23)
V =
1,438
= 0.00012 = variance for a simple random sample.
Then, multiplying by the design effect,
= (0.00012) (2.4)
= (0.00029) = estimated variance for the complex sample
In a similar way, the complex sample variance of a mean is determined by
multiplying the simple random sample variance of the mean by the appropriate
design effect.
The user can then proceed with estimating confidence intervals and testing
hypotheses in the usual manner.
The user should recognize that this approach does not incorporate the
variance-covariance matrix. In most cases, this leads to a slight
overestimate of the variance because the covariance terms, which are
subtracted in the variance of a ratio, in general, are positive. Thus, in a
borderline case, the null hypothesis would be less likely to be rejected
(Ref. No. 11).
Alternative or better approaches may exist or be developed. Users who want
to suggest such approaches, or who want the latest information should
contact the Scientific and Technical Information Branch (address given in
the beginning of this documentation).
Table 1
VISION
Average Design Effects, by Sex, for Selected Variables --
Mexican-American Portion
Mean or Tape Both
Variable Proportion Positions Sexes Male Female
Distance Vision Acuity of
20/20 or Better
Both eyes without
correction p 511-513 2.4 1.7 1.8
Right eye with correction
if worn p 517-519 1.5 1.3 1.3
Both eyes with correction p 520-522 1.2 1.2 1.0
Distance Vision Acuity of
worse than 20/50
Both eyes without
correction p 511-513 1.8 1.1 1.6
Right eye with correction
if worn p 517-519 1.0 1.1 1.1
Both eyes with correction p 520-522 1.0 1.0 1.2
Binocular Vision
Pass at 50 cm p 523 1.3 1.2 1.2
Near Vision Acuity of
20/20 or better at
40 cm
Both eyes without
correction p 529-531 2.5 1.7 2.0
Both eyes with correction p 541-543 1.4 1.3 1.5
Source: NCHS, HHANES, 1982-84, Tape Number 6507, Version 1.
Table 2
Average Design Effects, by Sex, for Selected Variables --
Cuban-American Portion
Mean or Tape Both
Variable Proportion Positions Sexes Male Female
Distance Vision Acuity of
20/20 or Better
Both eyes without
correction p 511-513 1.0 1.0 1.0
Right eye with correction
if worn p 517-519 1.0 1.0 1.0
Both eyes with correction p 520-522 1.1 1.1 1.2
Distance Vision Acuity of
worse than 20/50
Both eyes without
correction p 511-513 1.2 1.0 1.1
Right eye with correction
if worn p 517-519 1.1 1.3 1.0
Both eyes with correction p 520-522 1.0 1.0 1.0
Binocular Vision
Pass at 50 cm p 523 1.6 1.6 1.0
Near Vision Acuity of
20/20 or better at
40 cm
Both eyes without
correction p 529-531 1.0 1.0 1.0
Both eyes with correction p 541-543 1.2 1.0 1.2
Source: NCHS, HHANES, 1982-84, Tape Number 6507, Version 1.
Table 3
Average Design Effects, by Sex, for Selected Variables --
Puerto Rican Portion
Mean or Tape Both
Variable Proportion Positions Sexes Male Female
Distance Vision Acuity of
20/20 or Better
Both eyes without
correction p 511-513 1.1 1.0 1.0
Right eye with correction
if worn p 517-519 1.9 1.3 1.6
Both eyes with correction p 520-522 1.4 1.0 1.5
Distance Vision Acuity of
worse than 20/50
Both eyes without
correction p 511-513 1.0 1.0 1.0
Right eye with correction
if worn p 517-519 1.0 1.0 1.0
Both eyes with correction p 520-522 1.0 1.0 1.0
Binocular Vision
Pass at 50 cm p 523 1.6 1.2 1.5
Near Vision Acuity of
20/20 or better at
40 cm
Both eyes without
correction p 529-531 2.7 2.1 1.5
Both eyes with correction p 541-543 1.0 1.0 1.0
Source: NCHS, HHANES, 1982-84, Tape Number 6507, Version 1.
METHODS
DATA COLLECTION AND PROCESSING PROCEDURES
Data presented in Sections E through H and the family relationships data in
Section J were collected on the Household Screener and Family
Questionnaires. Data presented in Section K were collected on the Adult
Sample Person Questionnaire or on the Child Sample Person Questionnaire.
Section L data were collected during the physical examination which was
administered in the mobile examination center. Data presented in Section M
on the vision examination findings were collected by the dentist.
Examination forms and complete descriptions of the vision examination
procedures and equipment are given in Appendices 1 through 3. Completed
interview and examination forms were reviewed in the Survey's field offices
and again at the data processing center of NCHS by clerical editors. The
editors checked the forms for completeness, clarity, and compliance with
skip patterns, and they coded items such as industry and occupation. At the
data processing center the questionnaires were keyed and verified on
key-to-disk data entry equipment under the control of programs that checked
for valid codes and ranges, compliance with skip patterns, and consistency.
After being keyed, data were reedited by analysts for reasonableness and
consistency and for compliance with instructions for sampling and
questionnaire administration.
The vision data, like the questionnaire data, have undergone numerous
quality control and editing procedures in both the data collection and data
processing phases of the survey. Where possible, the results have been
compared with those of previous studies.
The examination protocol included training and periodic retraining of
examiners by a supervisor and consultant, as well as an ongoing system of
quality control procedures to reduce variability introduced by errors of
measurement. The vision screening included tests of near vision,
binocularity of vision, and distance vision. The tests were administered in
the order listed above to minimize the changes in lighting to which the eyes
had to adjust. The tests were given by the dentist, who was trained in
vision testing methods, to all sample persons 6-19 years of age and to a
random half-sample of those 20-74 years of age. The tests were administered
in the dental examining room immediately following completion of the dental
examination. The conditions of the vision screening tests adhered largely
to the procedures outlined in the report of the National Academy of
Sciences-National Research Council Committee on Vision (Ref. No. 12).
The near vision test determined visual acuity at up to four fixed distances
from 30 to 60 centimeters (cm). A test card consisting of Sloan letters or,
for illiterate examinees, Landolt Rings, was positioned at 40 cm from the
eyes, using a bar with a chin rest on one end and a metal frame that held
the card and could be moved to pre-marked distance settings. (This
procedure provided a means for conducting the near vision test at standard
distances.) Persons who were unable to read the 20/20 line at 40 cm were
also tested at 60 cm, 50 cm and 30 cm. However, only the standard visual
acuities recorded at 40 cm are provided on the accompanying data tape.
Examinees who wore glasses for near vision and remembered to bring them to
the examination center were tested first without correction and then with
correction. Contact lens wearers were tested only with correction to avoid
the problem of having to remove and re-insert the lenses. For persons who
forgot their glasses or contact lenses, this information was recorded, but
obviously only uncorrected vision could be tested.
Bionocularity was assessed using the Random Dot E (RDE) test, which is
valuable for determining the presence of amblyopia and for producing
conservative estimates of stereoacuity thresholds. The test, developed
primarily for use with young children, is simple, accurate, and quick, and
makes minimal demands on the subject (Ref. No. 13). In HHANES, examinees
were given polarized glasses to be worn during the test (the glasses were
used over any corrective lenses); they were then shown an RDE test card and
a stereo blank card and asked to identify the RDE card. The two cards
looked identical to persons with impaired binocularity, whereas those with
normal vision could easily distinguish the outline of an apparently recessed
"E" on the test card. the test was conducted first at 50 cm and again at
100 cm. To minimize the problem of guessing, the test was repeated four
times at each distance. A passing score depended on choosing the correct
card all four times.
Distance vision was tested using a chart with Sloan Letters or Landolt
Rings. During the first 13 locations the basic test distance was 4 meters
for determining visual acuity in the range 20/15 through 20/80 and 1 meter
for the range 20/100 through 20/400. However, because of space limitations
in the examination center, the 4 meter distance was simulated by placing the
chart with reversed Sloan letters on an illuminated box on one wall of the
examination room and situating a mirror of high optical quality on the
opposite wall. The examinees then read the reflection in the mirror.
Subsequent to location 13, for logistic reasons, the 1 meter chart for
acuities 20/100 or worse was replaced with two 4 meter charts. This
procedure allowed the determination of distance visual acuity as poor as
20/200+. All distance visual acuities poorer than 20/200 were recoded to
20/200 for comparability. To investigate the comparability of visual acuity
determined with and without a mirror, up to four randomly selected sample
persons each day were retested using an actual 4-meter test distance in
another part of the examination center. The results of this experiment
indicate that acuities obtained with a mirror are slightly worse than
acuities obtained without a mirror. However, use of a mirror did not
significantly compromise the validity of the data.
Distance vision was measured for each eye separately and for both eyes
together. Persons who wore glasses for distance vision were tested with
uncorrected vision for both eyes first, followed by tests with correction
for the left and right eyes separately, and then both eyes. Contact lens
wearers were tested, with corrected vision only, first for each eye
separately and then for both eyes. Examinees who had no corrective lenses,
and those who forgot to bring them to the examination center, had their
uncorrected vision tested, each eye separately, and then both eyes
together. To control bias resulting from memorization of the chart, the
examiner alternated the eye to be tested first -- sample persons with even
numbers had the right eye tested first, and odd-numbered sample persons
began with the left eye.
The examination protocol included training of examiners by a consultant, as
well as an ongoing system of quality control procedures to reduce
variability introduced by errors of measurement. Despite these efforts to
reduce measurement errors, residual errors of a magnitude large enough to
warrant concern occur in any survey. In the HHANES, systematic examiner
differences were observed for the distance vision examination, the binocular
vision (RDE) examination, and the near vision examination. The use of
multiple examiners increases the variability of the distribution because of
the inclusion of interexaminer errors of measurement while minimizing the
effect of an individual examiner bias. Users should be aware that these
technician differences do exist and are encouraged to consider this issue
before analyzing the vision examination data.
The general tape description format is Tape Position X Item X Counts. The
item (field) may be a tape descriptor (e.g., Version Number), a sample
person descriptor (e.g., Age at Interview), or a question (e.g., Is sample
person covered by Medicare?). Where appropriate, data entries are presented
by codes. Frequency counts are given for each code. The counts are
included to help the user in planning analyses and in verifying that
programs account for all data. The data source is given also (e.g., from
Family Questionnaire). In some cases, a note is referenced. The notes
contain explanations of the item (e.g., how Poverty Index is calculated).
The questionnaire data have undergone many quality control and editing
procedures. The responses of sample persons to some questions may appear
extreme or illogical. Self-reported data, especially, are subject to a
number of sources of variability, including recall and other reporting
errors. In the data clean-up process, responses that varied considerably
from expected were verified through direct review of the collection form or
a copy of it. Such responses may not represent fact, but they are included
as recorded in the field. The user must determine if these responses should
be included in analyses.
Responses to "other" and "specify" were recoded to existing categories if
possible. For responses that could not be recoded, new code categories were
created if the information was deemed analytically useful. Caution should
be used in interpreting the data from these new categories because there is
no way of knowing which other respondents would have selected one of the new
categories if given the option.
Missing data or unintelligible entries were assigned a code, usually "8",
which is labeled as "blank but applicable". These codes indicate that a
sample person should have a data value for a particular item but for varying
reasons that value is unavailable.
Copies of the questionnaires, both in English and Spanish, can be found in
the plan and operation report for HHANES (Ref. No. 1). Detailed information
on interviewing and examination procedures is contained in the household
interviewer's manual (Ref. No. 14) and the mobile examination center
interviewer's manual (Ref. No. 15) and the dental examiner's manual (Ref.
No. 16). These manuals are available upon request from:
Division of Health Examination Statistics
National Center for Health Statistics
Center Building, Room 2-58
3700 East-West Highway
Hyattsville, MD 20782
301-436-7080
TAPE DESCRIPTION SUMMARY
TAPE POSITIONS 1-400 contain data categories common to all data tapes:
sociodemographic data, family composition, family income, residence and
household. Sample weights are also in this set of data.
TAPE POSITIONS 401+ contain data categories unique to this data tape.
SOCIODEMOGRAPHIC DATA - SAMPLE PERSON (E)
1-5 Sample Person Sequence Number
6-15 Survey and Tape Identifiers
16 Examination Status
17 Language of Interview
18-21 Date of Interview
22-25 Date of Examination
26-29 Date of Birth
30-32 Age at Interview
33-38 Age at Examination
39-43 Family Number
44-45 Relationship to Head of Family
46 Sex
47 Race
48-49 National Origin or Ancestry
50-52 Birth Place
53 National Origin Recode
54-56 Education
57 Marital Status
58 Service in Armed Forces
59-69 Work/Occupation/Employment
70-95 Health Insurance/Health Care Support
96-99 Income Assistance/Public Compensation or Support
SOCIODEMOGRAPHIC DATA - HEAD OF FAMILY (F)
100 Interview and Examination Status
102-105 Date of Birth
106-108 Age at Interview
109 Sex
110 Race
111-112 National Origin or Ancestry
113-115 Birth Place
116-118 Education
119 Marital Status
120 Service in Armed Forces
121-131 Work/Occupation/Employment
FAMILY COMPOSITION AND INCOME DATA (G)
132-133 Number of People in Family
134-135 Number of Sample People in Family
136-138 Combined Family Income
139-143 Per Capita Income
144-146 Poverty Index
147-162 Income, Food Stamps
RESIDENCE AND HOUSEHOLD DATA (H)
163 Size of Place
164 Standard Metropolitan Statistical Area
165-166 Number of People in Household
167-168 Number of Sample People in Household
169-170 Number of Rooms
171 Kitchen Facilities Access
172-183 Heating/Cooling Equipment
SAMPLE WEIGHTS (I)
184-189 Examination Final Weight
190-195 Interview Final Weight
196-201 GTT/Ultrasound Weight
202-207 Audiometry/Vision Weight
208-213 Pesticide Weight
214-215 Strata Code
216-217 Pseudo PSU Code
FAMILY RELATIONSHIPS (J)
218-400 Data not yet available
MEDICAL HISTORY DATA-VISION (K)
403 Subsample Indicator
404-405 Birth Defects - Children
406-423 History and Care of Vision Problems - Children
424 Adult Sample Person Questionnaire Data Missing
425 Subsample Indicator
426-444 History and Care of Vision Problems - Adults
PHYSICAL FINDINGS - EYES (L)
445 Physician's Examination Form Blank
446 Strabismus
447-448 Conjunctiva
449-450 Xerophthalmia, Keratomalacia
451 Pterygium
452-453 Corneal Lesion
454-455 Pupils
456-457 Globe Absent
458-459 Ocular Fundus - Red Reflex
460-461 Lens Opacities
462-463 Fundus Visualization
464-479 Ocular Fundus - Pathologies
VISION TEST DATA (M)
501-504 Tape Number
505 Vision Exam Blank
506-508 Examiner Number
509 Optotype Used
510-522 Distance Vision
523-524 Binocular Vision
525-531 Near Vision
RECORD LAYOUT
Sociodemographic Data - Sample Person
Postitions 1-21
Tape Counts Source
Location Item Description and Code M C P and Notes
SECTION E. SOCIODEMOGRAPHIC DATA - SAMPLE PERSON (POS 1-99)
Source: Family Questionnaire (FQ)
Household Screener Questionnaire (HSQ)
1-5 Sample person sequence number7462
00001-09894 Mexican Americans 7462 - -
10002-12238 Cuban Americans - 1357 -
13001-16785 Puerto Ricans - - 2834
6-12 Blank
13 Portion of survey
1 Mexican-American (M) 7462 - -
2 Cuban-American (C) - 1357 -
3 Puerto Rican (P) - - 2834
14 Family Questionnaire missing
1 Yes 21 6 10 See Note 1
2 No 7441 1351 2824
15 Version number 7462 1357 2834
2
16 Examination status
1 Examined 7462 1357 2834 See Note 2
2 Not examined 0 0 0
17 Language of interview (Pos. 1-400) FQ
1 English 4513 244 1229
2 Spanish 2929 1107 1595
Blank 20 6 10
Date of interview HSQ 4
18-19 01-12 Month 7462 1357 2834
20-21 82-84 Year 7462 1357 2834
3Positions 22-43
Date of examination
From survey control record
22-23 01-12 Month 7462 1357 2834
24-25 82-84 Year 7462 1357 2834
Date of birth HSQ 2e
26-27 01-12 Month 7462 1357 2834
88 Blank but applicable 0 0 0
28-29 08-84 Year 7462 1357 2834
88 Blank but applicable 0 0 0
30-31 Age at interview (computed)
01-74 (See next column for units) 7462 1357 2834
32 Age at interview units HSQ 2f
1 Years 7342 1349 2796
2 Months 120 8 38
Age at examination (computed)
Positions 33-38 are all 0 for non-
examined persons.
33-34 00-75 Years 7462 1357 2834
35-36 00-11 Months 7462 1357 2834
37-38 00-30 Days 7462 1357 2834
39-43 Family number See Note 3
00002-03529 7462 - -
04005-04922 - 1357 -
07001-08584 - - 2834
3Positions 44-59
Tape Counts Source
Location Item Description and Code M C P and Notes
44-45 What is sample person's relationship HSQ 2b
to head of family? Sample person is: See Note 4
01 Head of family living alone (1 145 56 113
family with only 1 member)
02 Head of family, with no related 76 23 24
persons in household (2+
persons in household)
03 Head of family, with related 1582 369 678
persons in household
04 Wife of head (husband living at 1299 300 296
home and not in Armed Forces)
05 Wife of head (husband living at 5 0 0
home and is in Armed Forces)
06 Husband of head (wife living at 35 12 37
home and not in Armed Forces)
07 Husband of head (wife living at 0 0 0
home and is in Armed Forces)
08 Child of head or head's spouse 3769 484 1437
09 Grandchild of head or head's 217 32 115
spouse
10 Parent of head or head's spouse 57 35 33
11 Other relative (includes ex- 273 46 101
spouse, daughter-in-law, etc.)
12 Foster child 4 0 0
46 Sex FQ B-4
1 Male 3516 636 1237
2 Female 3946 721 1597
47 Observed race FQ B-5
1 White 7213 1300 2462 See Note 5
2 Black 76 15 152
3 Other 8 3 73
8 Blank but applicable 72 15 59
9 Not observed 72 18 78
Blank 21 6 10
48-49 Sample person's national origin or HSQ 2c
ancestry. See Note 6
01 Mexican/Mexicano 1641 1 1
02 Mexican-American 5202 0 0
03 Chicano 102 0 0
04 Puerto Rican 7 3 2596
05 Boricuan 0 0 36
06 Cuban 4 1069 20
07 Cuban-American 0 222 0
08 Hispano - specify 150 14 26
09 Other Latin-American or other 37 18 41
Spanish - specify
00 Other - specify 276 30 114
10 Spanish-American 22 0 0
11 Spanish (Spain) 21 0 0
50-52 In what state or foreign country FQ B-6
was sample person born? See Note 7
001-118 State/country code 7403 1345 2771
888 Blank but applicable 38 6 53
Blank 21 6 10
53 National origin recode See Note 8
"Hispanic" = Mexican-American in
Southwest, Cuban-American in
Florida and Puerto Rican in New
York City area.
1 "Hispanic" 7197 1291 2645
2 Not "Hispanic" 265 66 189
54-55 What is the highest grade or year of FQ B-7
regular school sample person has
ever attended?
00 Never attended or kinder- 1476 116 446
garten only
01-08 Elementary grade 3118 556 1090
09-12 High school grade 2119 400 1011
13-16 College 581 243 225
17 Graduate school 70 30 14
88 Blank but applicable 77 6 38
Blank 21 6 10
56 Did sample person finish that FQ B-8
grade/year?
1 Yes 3938 853 1436
2 No 1934 368 861
8 Blank but applicable 93 14 81
Blank 1497 122 456
57 Is sample person now married, FQ B-9
widowed, divorced, separated, or
has he or she never been married?
0 Under 14 years of age 2953 297 1000
1 Married - spouse in household 2600 632 660
2 Married - spouse not in household 70 17 54
3 Widowed 161 50 66
4 Divorced 214 92 155
5 Separated 159 21 149
6 Never married 1265 241 730
8 Blank but applicable 19 1 10
Blank 21 6 10
58 Did sample person ever serve in the FQ B-11
Armed Forces of the United States?
1 Yes 416 27 145
2 No 3557 952 1409
8 Blank but applicable 7 3 14
Blank 3482 375 1266
59 During the past 2 weeks, did sample FQ B-12
person work at any time at a job or
business, not counting work around
the house?
1 Yes 2210 622 613
2 No 1751 349 930
8 Blank but applicable 19 11 25
Blank 3482 375 1266
3Positions 60-80
Tape Counts Source
Location Item Description and Code M C P and Notes
60 Even though sample person did not FQ B-13
work during those 2 weeks, did he
or she have a job or business?
1 Yes 46 13 23
2 No 1704 334 902
8 Blank but applicable 20 13 30
Blank 5692 997 1879
61 Was sample person looking for work FQ B-14
or on layoff from a job?
1 Yes 217 43 60
2 No 1533 304 865
8 Blank but applicable 20 13 30
Blank 5692 997 1879
62 Which, looking for work or on layoff FQ B-15
from a job or both?
1 Looking 146 34 44
2 Layoff 46 6 8
3 Both 23 2 7
8 Blank but applicable 22 14 31
Blank 7225 1301 2744
63-65 What kind of business or industry FQ B-19
does sample person work for? See Note 9
010-932 Industry code 2429 665 681
990 Blank but applicable 49 18 37
Blank 4984 674 2116
66-68 What kind of work was sample FQ B-20
person doing? See Note 9
003-889 Occupation code 2432 666 681
999 Blank but applicable 46 17 37
Blank 4984 674 2116
69 Class of worker FQ B-22
1 An employee of a private company, 1912 543 551
business or individual for
wages, salary, or commission
2 A Federal government employee 74 6 21
3 A State government employee 124 19 17
4 A Local government employee 169 17 56
5 Self-employed in own incorporated 17 12 7
business or professional
practice
6 Self-employed in own unincorpora- 131 67 27
ted business, professional
practice, or farm
7 Working without pay in family 3 0 0
business or farm
8 Blank but applicable 46 18 38
0 Never worked or never worked at a 2 1 1
full-time civilian job lasting
2 weeks or more
Blank 4984 674 2116
70 Is sample person now covered by FQ C-2
Medicare?
1 Covered 303 107 139
2 Not covered 7129 1237 2674
8 Blank but applicable 6 6 11
9 Don't know 3 1 0
Blank 21 6 10
71 Is sample person now covered by the FQ C-3
part of Social Security Medicare
which pays for hospital bills?
1 Yes 270 100 124
2 No 18 4 5
8 Blank but applicable 15 6 20
9 Don't know 6 3 1
Blank 7153 1244 2684
72 Is sample person now covered by that FQ C-4
part of Medicare which pays for
doctor's bills? This is the Medi-
care plan for which he or she or some
agency must pay a certain amount
each month.
1 Yes 269 100 111
2 No 17 5 17
8 Blank but applicable 15 6 20
9 Don't know 8 2 2
Blank 7153 1244 2684
73 Type of Medicare coverage FQ C-5
As shown on Medicare card
1 Hospital 0 0 0
2 Medical 2 0 0
3 Card not available 3 0 2
4 Hospital and medical 5 3 0
8 Blank but applicable 15 6 20
Blank 7437 1348 2812
HEALTH INSURANCE See Note 10
74 Is sample person covered by any FQ C-11
health insurance plan which pays
any part of a hospital, doctor's,
or surgeon's bill?
1 Yes 4094 818 1011
2 No 3326 526 1796
8 Blank but applicable 13 7 16
9 Don't know 8 0 1
Blank 21 6 10
75 Is sample person covered by a plan FQ C-9
that pays any part of hospital
expenses?
1 Yes 4039 806 955
2 No 6 7 9
8 Blank but applicable 54 12 55
9 Don't know 8 0 8
Blank 3355 532 1807
76 Is sample person covered by a plan FQ C-10
that pays any part of a doctor's or
surgeon's bills for operations?
1 Yes 4034 804 945
2 No 22 11 28
8 Blank but applicable 36 10 35
9 Don't know 15 0 19
Blank 3355 532 1807
Many people do not carry health FQ C-13/15
insurance for various reasons.
Which of these statements describes
why sample person is not covered by
any health insurance (or Medicare)?
(Positions 77-80)
77-78 Main Reason
01 Care received through Medicaid 267 31 854
or Welfare
02 Unemployed, or reasons related 350 40 114
to unemployment
03 Can't obtain insurance because 24 2 15
of poor health, illness or age
04 Too expensive, can't afford 1767 280 506
health insurance
05 Dissatisfied with previous 50 3 3
isurance
06 Don't believe in insurance 31 4 8
07 Have been healthy, not much sick- 206 23 31
ness in the family, haven't
needed health insurance
08 Military dependent, (CHAMPUS), 45 1 15
Veteran's benefits
09 Some other reason - not specified 2 0 7
10 Some other reason - specified 255 35 58
88 Blank but applicable 118 34 77
Blank 4347 904 1146
79-80 Second Reason
00 No second reason reported 2573 339 1374
01 Care received through Medicaid 70 17 58
or Welfare
02 Unemployed or reasons related to 109 30 30
unemployment
03 Can't obtain insurance because of 4 2 3
poor health, illness or age
04 Too expensive, can't afford 168 20 132
health insurance
05 Dissatisfied with previous 15 1 2
insurance
06 Don't believe in insurance 18 3 3
07 Have been health, not much sick- 47 4 8
ness in the family, haven't
needed health insurance
08 Military dependent, (CHAMPUS), 0 0 2
Veteran's benefits
09 Some other reason - not specified 0 0 0
10 Some other reason - specified 25 8 7
88 Blank but applicable 86 29 69
Blank 4347 904 1146
3Positions 81-99
Tape Counts Source
Location Item Description and Code M C P and Notes
81-87 Blank
88 During the last 12 months, has sample FQ D-6
person received health care which has
been or will be paid for by Medicaid?
1 Yes 537 101 1076
2 No 6859 1242 1708
8 Blank but applicable 45 7 40
9 Don't know 0 1 0
Blank 21 6 10
89 Does sample person have a Medicaid FQ D-8
card?
1 Yes 530 104 1144
2 No 6872 1232 1647
8 Blank but applicable 39 15 33
9 Don't know 0 0 0
Blank 21 6 10
90 Status of sample person's Medicaid FQ D-9
card?
1 Medicaid card seen - current 382 84 832
2 Medicaid card seen - expired 7 0 12
3 No card seen 128 17 274
4 Other card seen 0 0 0
5 Other card seen (specify) 5 0 2
8 Blank but applicable 47 18 57
Blank 6893 1238 1657
91 Is sample person now covered by any FQ D-11
other public assistance program that
pays for health care?
1 Yes 54 2 28
2 No 7376 1348 2780
8 Blank but applicable 11 1 15
9 Don't know 0 0 0
Blank 21 6 10
92 Does sample person now receive FQ D-13
military retirement payments from
any branch of the Armed Forced or a
pension from the Veteran's Admini-
stration? Do not include VA disa-
bility compensation.
1 Yes 56 4 9
2 No 7373 1346 2806
8 Blank but applicable 12 1 9
9 Don't know 0 0 0
Blank 21 6 10
93 Which does sample person receive: FQ D-14
the Armed Forces retirement; the
VA pension; or both?
1 Armed Forces 16 0 2
2 Veteran's Administration 30 0 5
3 Both 4 4 1
8 Blank but applicable 18 1 10
Blank 7394 1352 2816
94 Is sample person now covered by FQ D-16
CHAMP-VA, which is medical insurance
for dependents or survivors of dis-
abled veterans?
1 Yes 45 4 10
2 No 7388 1346 2806
8 Blank but applicable 8 1 6
9 Don't know 0 0 0
Blank 21 6 10
95 Is sample person now covered by any FQ D-18
other program that provides health
care for military dependents or sur-
vivors of military persons?
1 Yes 41 4 8
2 No 7387 1346 2804
8 Blank but applicable 13 1 12
9 Don't know 0 0 0
Blank 21 6 10
96 Is sample person included in the FQ D-2
AFDC, "Aid to Families With Dependent
Children", assistance payment?
1 Yes 394 39 650
2 No 7020 1304 2134
8 Blank but applicable 27 6 39
9 Don't know 0 2 1
Blank 21 6 10
97 Does sample person now receive the FQ D-4
"Supplemental Security Income" or
"SSI" gold-colored check?
1 Yes 131 44 135
2 No 7285 1295 2659
8 Blank but applicable 25 12 30
9 Don't know 0 0 0
Blank 21 6 10
98 Does sample person have a disability FQ D-20
related to his or her service in the
Armed Forces of the United States?
1 Yes 48 2 14
2 No 346 20 108
8 Blank but applicable 29 8 37
Blank 7039 1327 2675
99 Does sample person now receive com- FQ D-21
pensation for this disability from
the Veteran's Administration?
1 Yes 31 1 9
2 No 17 1 4
8 Blank but applicable 29 8 38
Blank 7385 1347 2783
2Sociodemographic Data - Head of Family
Tape Counts Source
Location Item Description and Code M C P and Notes
SECTION F. SOCIODEMOGRAPHIC DATA - HEAD OF FAMILY (POS 100-131)
Source: Family Questionnaire (FQ)
Household Screener Questionnaire (HSQ)
100 Interview and examination status of See Note 4
head of family
1 Selected as sample person, 5523 1076 2098
interviewed on Adult Sample
Person Questionnaire, and
examined
2 Selected as sample person, 338 62 79
interviewed on Adult Sample
Person Questionnaire, but
not examined
3 Selected as sample person, not 218 34 23
interviewed, and not examined
4 Not selected as sample person 1362 179 624
Blank 21 6 10
101 Blank
Date of birth HSQ 2e
102-103 01-12 Month 7413 1348 2830
88 Blank but applicable 49 9 4
104-105 08-86, 89-88 Year 7440 1353 2832
88 Blank but applicable 22 4 2
106-107 Age at interview
17-95 Years 7462 1357 2834
108 Blank
109 Sex FQ B-4
1 Male 5982 1069 1331
2 Female 1460 282 1493
Blank 20 6 10
110 Observed race FQ B-5
1 White 7138 1282 2511 See Note 5
2 Black 75 27 165
3 Other 6 3 58
8 Blank but applicable 106 31 59
9 Not observed 117 8 31
Blank 20 6 10
111-112 Head of family's national origin HSQ 2c
or ancestry. See Note 6
01 Mexican/Mexicano 2068 0 3
02 Mexican-American 4523 0 0
03 Chicano 97 0 0
04 Puerto Rican 19 7 2503
05 Boricuan 0 0 29
06 Cuban 6 1197 46
07 Cuban-American 0 85 2
08 Hispano - specify 147 20 37
09 Other Latin-American or other 54 17 39
Spanish - specify
00 Other - specify 513 31 175
10 Spanish-American 17 0 0
11 Spanish (Spain) 18 0 0
113-115 In what state or foreign country FQ B-6
was head of family born? See Note 7
001-118 State/country code 7362 1331 2762
888 Blank but applicable 80 20 62
Blank 20 6 10
116-117 What is the highest grade or year FQ B-7
of regular school head of family
has ever attended?
00 Never attended or kinder- 250 7 35
garten only
01-08 Elementary grade 2959 511 889
09-12 High school grade 2896 411 1445
13-16 College 1002 336 363
17 Graduate school 170 57 41
88 Blank but applicable 165 29 51
Blank 20 6 10
118 Did head of family finish that FQ B-8
grade/year?
1 Yes 5710 1171 2210
2 No 1316 137 492
8 Blank but applicable 166 36 87
Blank 270 13 45
119 Is head of family now married, FQ B-9
widowed, divorced, separated, or
has he or she never been married?
0 Under 14 0 0 0
1 Married - spouse in household 5706 1059 1295
2 Married - spouse not in household 129 9 129
3 Widowed 333 48 133
4 Divorced 492 136 376
5 Separated 388 28 452
6 Never married 320 56 418
8 Blank but applicable 74 15 21
Blank 20 6 10
120 Did head of family ever serve in FQ B-11
the Armed Forces of the United
States?
1 Yes 1478 64 383
2 No 5883 1265 2400
8 Blank but applicable 81 22 41
Blank 20 6 10
121 During the past 2 weeks, did head FQ B-12
of family work at any time at a job
or business, not counting work
around the house?
1 Yes 5443 1019 1283
2 No 1923 305 1504
8 Blank but applicable 76 27 37
Blank 20 6 10
122 Even though head of family did not FQ B-13
work during those 2 weeks, did he
or she have a job or business?
1 Yes 101 19 28
2 No 1822 286 1476
8 Blank but applicable 76 27 37
Blank 5463 1025 1293
123 Was head of family looking for work FQ B-14
or on layoff from a job?
1 Yes 510 61 118
2 No 1413 244 1384
8 Blank but applicable 76 27 39
Blank 5463 1025 1293
124 Which, looking for work or on FQ B-15
layoff from a job or both?
1 Looking 270 43 69
2 Layoff 151 12 26
3 Both 85 3 17
8 Blank but applicable 80 30 45
Blank 6876 1269 2677
125-127 What kind of business or industry FQ B-19
does head of family work for? See Note 9
010-932 Industry code 5980 1080 1395
990 Blank but applicable 118 28 62
Blank 1364 249 1377
128-130 What kind of work was head of FQ B-20
family doing? See Note 9
003-889 Occupation code 5988 1080 1391
999 Blank but applicable 110 28 66
Blank 1364 249 1377
131 Class of worker FQ B-22
1 Employee of a private company, 4702 842 1058
business or individual for
wages, salary, or commission
2 A Federal government employee 219 4 45
3 A State government employee 246 12 54
4 A Local government employee 359 22 169
5 Self-employed in own incorpora- 49 25 14
ted business or professional
practice
6 Self-employed in own unincor- 420 171 56
porated business, profes-
sional practice, or farm
7 Working without pay in family 0 0 0
business or farm
8 Blank but applicable 99 32 60
0 Never worked or never worked at 4 0 1
a full-ime civilian job
lasting 2 weeks or more
Blank 1364 249 1377
2Family Composition and Income Data
Tape Counts Source
Location Item Description and Code M C P and Notes
G. FAMILY COMPOSITION AND INCOME DATA (POS 132-162)
Source: Family Questionnaire (FQ)
132-133 Number of persons in family
(computed)
01-18 Persons 7462 1357 2834
134-135 Number of sample persons in family
(computed)
01-13 Persons 7462 1357 2834
136 Was the total combined family FQ E-10
income during the past 12 months
more or less than $20,000? Include
money from jobs, Social Security,
retirement income, unemployment pay-
ments, public assistance, and so
forth. Also include income net
from interest, dividends, income
from business, farm or rent, and
any other money income received.
1 $20,000 or more 2353 536 578
2 Less than $20,000 4856 795 2193
7 Refused information 31 1 7
8 Blank but applicable 202 19 46
Blank 20 6 10
137-138 Of those income groups, which best FQ E-11
represents the total combined
family income during the past 12
months? Include wages, salaries,
and other items we just talked
about. (in dollars)
01 Less than 1,000 40 8 7
02 1,000 - 1,999 107 10 33
03 2,000 - 2,999 143 25 68
04 3,000 - 3,999 182 28 132
05 4,000 - 4,999 184 34 250
06 5,000 - 5,999 234 45 202
07 6,000 - 6,999 312 35 213
08 7,000 - 7,999 314 46 169
09 8,000 - 8,999 284 42 106
10 9,000 - 9,999 263 52 125
11 10,000 - 10,999 282 72 139
12 11,000 - 11,999 250 47 75
13 12,000 - 12,999 296 54 100
14 13,000 - 13,999 186 32 64
15 14,000 - 14,999 254 25 66
16 15,000 - 15,999 208 36 77
17 16,000 - 16,999 209 34 51
18 17,000 - 17,999 231 37 66
19 18,000 - 18,999 333 28 82
20 19,000 - 19,999 240 55 79
21 20,000 - 24,999 694 148 152
22 25,000 - 29,999 585 83 124
23 30,000 - 34,999 358 78 92
24 35,000 - 39,999 257 64 43
25 40,000 - 44,999 192 48 36
26 45,000 - 49,999 84 43 30
27 50,000 and over 107 55 54
77 Refused information 76 10 43
88 Blank but applicable 537 77 146
Blank 20 6 10
139-143 Per capita income (computed) See Note 11
00083-50000 Dollars 6829 1264 2636
88888 Blank but applicable 613 87 189
Blank 20 6 9
144-146 Poverty index (computed) See Note 12
Decimal not shown on tape
0.04-9.78 6829 1264 2636
999 Blank but applicable 613 87 189
Blank 20 6 9
147 Did any member of this family FQ E-12
receive any Government food
stamps in any of the past 12
months?
1 Yes 1651 234 1344
2 No 5783 1115 1474
8 Blank but applicable 8 2 6
Blank 20 6 10
148-149 In how many months of the past 12 FQ E-13
months did any member of this
family receive food stamps?
01-12 Months 1631 234 1335
88 Blank but applicable 28 2 15
Blank 5803 1121 1484
150 Did this family receive any FQ E-14
government food stamps last
month?
1 Yes 1345 187 1290
2 No 303 47 50
8 Blank but applicable 11 2 10
Blank 5803 1121 1484
151-152 In which month did any member of FQ E-15
this family last receive food
stamps?
01-12 Months 298 47 50
88 Blank but applicable 16 2 10
Blank 7148 1308 2774
153-154 For how many persons were those FQ E-16
food stamps authorized?
01-13 Persons 1641 234 1337
88 Blank but applicable 18 2 13
Blank 5803 1121 1484
155-157 What was the total face value of FQ E-17
those food stamps received by this
family in that month?
010-520 Dollars 1567 230 1325
888 Blank but applicable 92 6 25
Blank 5803 1121 1484
158 Did this family spend more for food FQ E-18
in that month than the value of
your food stamps?
1 Yes 1405 194 1279
2 No 231 40 64
8 Blank but applicable 23 2 7
Blank 5803 1121 1484
159-161 How much more? FQ E-19
003-880 Dollars 1314 182 1258
888 Blank but applicable 114 14 28
Blank 6034 1161 1548
162 Is your family receiving food FQ E-20
stamps at the present time?
1 Yes 1273 175 1269
2 No 6153 1171 1542
8 Blank but applicable 16 5 13
Blank 20 6 10
2Residence and Household Data
Tape Counts Source
Location Item Description and Code M C P and Notes
H. RESIDENCE AND HOUSEHOLD DATA (POS 163-183)
Source: Family Questionnaire (FQ)
Household Screener Questionnaire (HSQ)
163 Size of place See Note 13
1 1 million or more 1049 0 2070
2 500,000 - 999,999 844 0 0
3 250,000 - 499,999 884 467 0
4 100,000 - 249,999 203 364 368
5 50,000 - 99,999 1277 70 76
6 25,000 - 49,999 785 205 216
7 10,000 - 24,999 746 120 79
8 200 - 9,999 1003 88 24
9 Not in a place 671 43 1
164 Standard Metropolitan Statistical See Note 13
Area
1 In SMSA, in central city 3707 467 2465
2 In SMSA, not in central city 2854 890 369
4 Not in SMSA 901 0 0
165-166 Number of persons in household HSQ 1a
01-18 Persons 7462 1357 2834
167-168 Number of sample persons in
household (computed)
01-13 Persons 7462 1357 2834
169-170 How many rooms are in this home? FQ E-1
Count the kitchen, but not the
bathroom.
01-14 Rooms 7433 1350 2816
88 Blank but applicable 9 1 8
Blank 20 6 10
171 Do you have access to complete FQ E-2
kitchen facilities in this home;
that is, a kitchen sink with
piped water, a refrigerator and
a range or cookstove?
1 Yes 7136 1315 2548
2 No 83 10 18
8 Blank but applicable 223 26 258
Blank 20 6 10
172-173 What is the main fuel used for FQ E-3
heating this home? See Note 14
00 No fuel used 538 231 16
01 Oil 4 0 1988
02 Natural gas 5955 78 718
03 Electricity 604 1027 37
04 Bottled gas (propane) 174 2 0
05 Kerosene 13 3 0
06 Wood 98 3 0
07 Coal 0 0 14
08 Other, not specified 0 0 2
09 Other, specified 11 0 8
88 Blank but applicable 45 7 41
Blank 20 6 10
174-175 What is the main heating equipment FQ E-4
for this home? See Note 14
00 No heating equipment used 538 231 20
01 Steam or hot water with 44 5 1450
radiators or convectors
02 Central warm air furnace with 2677 542 180
ducts to individual rooms,
or central heat pump
03 Built-in electric units (per- 474 323 63
manently installed in wall,
ceiling or baseboard)
04 Floor, wall or pipeless furnace 1598 46 21
05 Room heaters with flue or vent, 805 17 596
burning oil, gas, or kerosene
06 Room heaters without flue or 847 6 425
vent, burning oil, gas, or
kerosene
07 Heating stove burning wood, 88 0 9
coal or coke
08 Fireplace(s) 91 4 0
09 Portable electric heater(s) 139 137 4
10 Other, not specified 0 0 0
11 Other, specified 114 35 16
88 Blank but applicable 1 5 23
99 Don't know 26 0 17
Blank 20 6 10
176-177 Are any other types of equipment FQ E-5
used for heating this home? See Note 14
00 No other heating equipment used 6057 1073 2350
01 Steam or hot water with 0 0 13
radiators or convectors
02 Central warm air furnace with 11 15 7
ducts to individual rooms,
or central heat pump
03 Built-in electric units (per- 24 0 2
manently installed in wall,
ceiling or baseboard)
04 Floor, wall or pipeless furnace 11 0 0
05 Room heaters with flue or vent, 22 0 3
burning oil, gas, or kerosene
06 Room heaters without flue or 22 1 29
vent, burning oil, gas, or
kerosene
07 Heating stove burning wood, 70 0 8
coal or coke
08 Fireplace(s) 449 8 9
09 Portable electric heater(s) 186 18 351
10 Other, not specified 4 2 3
11 Other, specified 18 2 4
88 Blank but applicable 30 1 25
Blank 558 237 30
178-179 What is the main fuel used by this FQ E-6
additional equipment? See Note 14
00 No fuel used 2 0 2
01 Oil 0 0 20
02 Natural gas 96 2 27
03 Electricity 214 35 345
04 Bottled gas (propane) 9 0 1
05 Kerosene 2 0 25
06 Wood 471 8 11
07 Coal 2 0 0
08 Other, not specified 0 0 0
09 Other, specified 7 0 0
88 Blank but applicable 44 2 3
Blank 6615 1310 2380
180-181 What is the main fuel used for FQ E-7
cooking in this home?
00 No fuel used 21 4 4
01 Oil 14 0 31
02 Natural gas 5899 253 2603
03 Electricity 1295 1083 148
04 Bottled gas (propane) 182 8 12
05 Kerosene 0 0 3
06 Wood 0 0 0
07 Coal 0 0 0
08 Other, not specified 0 0 0
09 Other, specified 14 1 0
88 Blank but applicable 17 2 23
Blank 20 6 10
182 Do you have air-conditioning - FQ E-8
either individual room units, a
central system or evaporative
cooling?
1 Yes 3583 1254 653
2 No 3845 96 2153
8 Blank but applicable 14 1 18
Blank 20 6 10
183 Which do you have? FQ E-9
1 Individual room unit 1625 583 613
2 Central air-conditioning 1233 660 22
3 Evaporative cooling 719 6 10
8 Blank but applicable 20 6 26
Blank 3865 102 2163
2Sample Weights
Tape Counts Source
Location Item Description and Code M C P and Notes
I. SAMPLE WEIGHTS (POS 184-217)
184-189 Examined final weight
000439-002711 7462 - -
000223-000891 - 1357 -
000177-002000 - - 2834
190-195 Interview final weight
000447-002096 7462 - -
000176-000604 - 1357 -
000175-001220 - - 2834
GTT/ULTRASOUND, AUDIOMETRY/VISION, PESTICIDE WEIGHTS
By design, only some of the persons in the sample were included in
the GTT/ultrasound, audiometry/vision, and pesticide components of
the survey. Tape positions for those persons not part of these
subsamples are BLANK.
196-201 GTT/ultrasound weight
000843-005302 1777 - -
000469-001685 - 449 -
000349-003110 5685 908 2167
Blank - - 667
202-207 Audiometry/vision weight
000507-006283 4431 - -
000223-001600 - 804 -
000264-003123 - - 1759
Blank 3031 553 1075
208-213 Pesticide weight
000872-005584 2465 - -
000441-001600 - 568 -
000343-003117 - - 1012
Blank 4997 789 1822
214-215 Strata code
01-08 7462 1357 2834
216-217 Pseudo PSU code
01-02 7462 1357 2834
2Family Relationships
Tape Counts Source
Location Item Description and Code M C P and Notes
J. FAMILY RELATIONSHIPS (POS 218-400)
Source: Adult Sample Person Questionnaire
Family Questionnaire
218-400 Blank
Data not yet available
2Medical History Data - Vision
Position Item description Counts Source
and code M C P and notes
K. MEDICAL HISTORY DATA - VISION (POS 401-444)
Source: Child Sample Person Questionnaire (CSPQ)
Source: Adult Sample Person Questionnaire (ASPQ)
POSITIONS 404-423 CONTAIN SELECTED INTERVIEW DATA
ON CHILDREN 6 THROUGH 11 YEARS. THIS DATA IS ALSO FOUND ON
HHANES DATA-TAPE NUMBER 6522 (CHILD HISTORY QUESTIONNAIRE)
401-402 Blank 7462 1357 2834
403 Subsample Indicator
0 Ages 6 months - 5 years 1254 104 408
1 Ages 6-11 years 1296 133 437
Blank Ages 12-74 years 4912 1120 1989
404 Was the sample person born with any physical CSPQ A-11
or mental problem or birth defect?
1 Yes 184 14 92
2 No 2364 223 751
8 Blank but applicable 2 0 2
Blank 4912 1120 1989
405 Did the sample person's problem or defect CSPQ A-12
involve his or her eyes?
1 Yes 13 0 3
2 No 169 13 86
8 Blank but applicable 3 0 4
9 Don't know 1 1 1
Blank 7276 1343 2740
406 Has the sample person ever had trouble CSPQ D-1
seeing with one or both eyes when not See Note 15
wearing glasses or contact lenses?
1 Yes 227 28 131
2 No 2320 209 712
8 Blank but applicable 3 0 2
Blank 4912 1120 1989
407 How old was the sample person when he or she CSPQ D-2
first began having trouble seeing?
1 Under 1 year old 15 3 12
2 1-4 years old 22 4 23
3 5-11 years old 190 21 96
8 Blank but applicable 3 0 2
Blank 7232 1329 2701
408 Did the sample person ever see a doctor CSPQ
D-3
about it?
1 Yes 168 27 113
2 No 59 1 18
8 Blank but applicable 3 0 2
Blank 7232 1329 2701
409 Does the sample person wear glasses or CSPQ
D-4
contact lenses?
1 Yes 106 18 85
2 No 121 10 46
8 Blank but applicable 3 0 2
Blank 7232 1329 2701
410 Does the sample person have trouble with CSPQ D-5
his or her vision even when wearing glasses
or contact lenses?
1 Yes 23 2 13
2 No 82 16 70
8 Blank but applicable 4 0 4
Blank 7353 1339 2747
411 Has the sample person ever worn glasses or CSPQ D-6
contact lenses? (Does not include glasses See Note 16
that are worn for purposes other than
improving or correcting vision.)
1 Yes 15 3 11
2 No 106 7 35
8 Blank but applicable 3 0 2
Blank 7338 1347 2786
Reason sample person stopped wearing glasses CSPQ D-7
or contact lenses (Positions 412-415. More See Note 17
than one reason may apply)
412 1 No longer needed them 5 3 5
8 Blank but applicable 3 0 2
Blank 7454 1354 2827
413 1 Didn't seem to help 3 0 1
8 Blank but applicable 3 0 2
Blank 7456 1357 2831
414 1 Inconvenient 2 0 0
8 Blank but applicable 3 0 2
Blank 7457 1357 2832
415 1 Other - not specified 0 0 0
2 Other - specified 1 0 4
3 Other specified: glasses
lost or broken 4 0 1
8 Blank but applicable 3 0 2
Blank 7454 1357 2827
Purpose for which sample person's CSPQ D-8
glasses or contact lenses were prescribed See Note 17
(Positions 416-418. More than one purpose
may apply)
416 1 Reading/close work 60 5 63
8 Blank but applicable 5 0 3
Blank 7397 1352 2768
417 1 Seeing distant objects 66 12 47
8 Blank but applicable 5 0 3
Blank 7391 1345 2784
418 1 Other - not specified 1 0 0
2 Other - specified 12 7 9
3 Other specified: astigmatism 2 0 0
8 Blank but applicable 5 0 3
Blank 7442 1350 2822
419 How often (does/did) the sample person CSPQ D-9
use his or her glasses or contact lenses:
all of the time, most of the time, hardly
ever, or never?
1 All of the time 48 12 29
2 Most of the time 33 4 37
3 Hardly ever 29 4 23
4 Never 9 0 6
8 Blank but applicable 5 1 3
Blank 7338 1336 2736
420 Age of the sample child and school CSPQ D-10
status.
1 Under 5 years old 1029 93 347
2 5+ years old, goes to school 1458 142 475
3 5+ years old, doesn't go
to school 63 2 22
8 Blank but applicable 0 0 1
Blank 4912 1120 1989
421 Is the sample person able to read from the CSPQ D-11
blackboard from the back of the classroom See Note 15
(when wearing glasses or contact lenses)?
(Asked only of children five years of age
and over who go to school)
1 Yes 1253 130 373
2 No 105 9 57
8 Blank but applicable 2 1 15
9 Don't know 98 2 31
Blank 6004 1215 2358
422 Were you ever told by a doctor that the CSPQ D-12
sample person had learning or developmental
problems related to his or her vision?
(Asked only of children five years of age
and over)
1 Yes 47 5 22
2 No 1467 138 467
8 Blank but applicable 0 1 5
9 Don't know 7 0 4
Blank 5941 1213 2336
423 When was the last time the sample person CSPQ D-13
had his or her vision tested? See Note 18
(Asked all children)
1 6 months ago or less 567 81 278
2 Over 6 months to 12 months 436 33 159
3 Over 12 months to 2 years 260 15 87
4 Over 2 years to 5 years 122 11 29
5 More than 5 years 14 2 3
6 Never 1075 91 268
8 Blank but applicable 0 1 0
9 Don't know 76 3 21
Blank 4912 1120 1989
POSITIONS 426-444 CONTAIN SELECTED INTERVIEW DATA FOR
ADOLESCENTS AND ADULTS AGES 12 THROUGH 74 YEARS. THIS DATA
IS ALSO FOUND ON HHANES DATA TAPE NUMBER 652 1 (ADOLESCENT AND
ADULT HISTORY QUESTIONNAIRE)
424 Adult Sample Person Questionnaire See Note 19
Data Missing?
1 Yes 1 0 1
2 No 4911 1120 1988
Blank 2550 237 845
425 Subsample Indicator
1 Ages 12-74 years 4912 1120 1989
Blank Ages 6 months-11 years 2550 237 845
426 Have you ever had trouble seeing with one ASPQ D-1
or both eyes when not wearing glasses or
contact lenses?
1 Yes 2590 702 1170
2 No 2321 418 818
8 Blank but applicable 0 0 0
Blank 2551 237 846
427-428 How old were you when you first began ASPQ D-2
having trouble seeing?
01 0-4 years old 56 22 41
02 5-9 years old 289 50 170
03 10-19 years old 847 133 350
04 20-29 years old 316 56 110
05 30-39 years old 259 115 127
06 40-49 years old 505 246 258
07 50-59 years old 241 61 90
08 60-64 years old 46 10 15
09 65 years old or older 19 8 4
88 Blank but applicable 12 1 5
Blank 4872 655 1664
429 Did you ever see a doctor about it? ASPQ D-3
1 Yes 2240 661 1084
2 No 350 41 85
8 Blank but applicable 0 0 1
Blank 4872 655 1664
430 Do you wear glasses or contact lenses? ASPQ D-4
1 Yes 1930 621 923
2 No 660 81 247
8 Blank but applicable 0 0 0
Blank 4872 655 1664
431 Do you have trouble with your vision even ASPQ D-5
when wearing glasses or contact lenses?
1 Yes 411 91 224
2 No 1518 529 696
8 Blank but applicable 1 1 3
Blank 5532 736 1911
432 Have you ever worn glasses or contact ASPQ D-6
lenses?
1 Yes 232 37 123
2 No 428 44 124
8 Blank but
applicable 0 0 0
Blank 6802 1276 2587
Why did you stop wearing them? (Pos. 433-438) ASPQ D-7
(MARK ALL THAT APPLY) See Notes
17,20
433 1 No longer need them 67 8 37
8 Blank but applicable 1 2 0
Blank 7394 1347 2797
434 1 Didn't seem to help 28 4 12
8 Blank but applicable 1 2 0
Blank 7433 1351 2822
435 1 Inconvenient 67 14 28
8 Blank but applicable 1 2 0
Blank 7394 1341 2806
436 1 Broken, lost or stolen 40 5 29
8 Blank but applicable 1 2 0
Blank 7421 1350 2805
437 1 Too expensive 25 1 2
8 Blank but applicable 1 2 0
Blank 7436 1354 2832
438 1 Other, not specified 2 0 1
2 Other, specified 19 5 20
8 Blank but applicable 1 2 0
Blank 7440 1350 2813
What (are/were) your glasses or contact ASPQ D-8
lenses prescribed for? (Pos. 439-444) See Notes 17,
(More than one purpose may apply) 20
439 1 Reading/close work 1309 504 761
8 Blank but applicable 12 5 4
Blank 6141 848 2069
440 1 Seeing distant objects 1142 331 536
8 Blank but applicable 12 5 4
Blank 6308 1021 2294
441 1 Astigmatism 47 17 12
8 Blank but applicable 12 5 4
Blank 7403 1335 2818
442 1 Other, not specified 20 1 1
2 Other, specified 115 24 53
8 Blank but applicable 12 5 4
Blank 7315 1327 2776
443 How often (do/did) you use your glasses ASPQ D-9
or contacts: All of the time, most of the
time, hardly ever, or never?
1 All of the time 920 276 358
2 Most of the time 604 165 365
3 Hardly ever 548 192 270
4 Never 82 18 48
8 Blank but applicable 8 7 5
Blank 5300 699 1788
444 When was the last time you had your vision ASPQ D-10
tested?
1 6 mos. ago or less 986 281 558
2 Over 6 mos. through 12 mos. 898 245 442
3 Over 12 mos. through 2 years 892 209 386
4 Over 2 years through 5 years 1021 223 317
5 More than 5 years 569 91 165
6 Never 486 67 84
8 Blank but applicable 2 1 1
9 Don't know 57 3 35
Blank 2551 237 846
2Physical Findings - Eyes
Position Item description Counts Source
and code M C P and notes
L. PHYSICAL FINDINGS - EYES (POS 445-479)
Source: Physician's Examination
445 Physician's examination form blank? See Note 21
1 No physician's examination data
were taken. Positions 446-479 135 12 70
are blank.
2 Physician's examination data are
present. 7327 1345 2764
446 Eyes-strabismus
1 Yes 733 14 42
4 No 6587 1327 2718
8 Blank but applicable 7 4 4
Blank 135 12 70
447 Eyes-conjunctival injection
1 Yes 84 9 9
4 No 7240 1332 2753
8 Blank but applicable 3 4 2
Blank 135 12 70
448 Eyes-pale conjunctiva
1 Yes 14 0 4
4 No 7309 1341 2758
8 Blank but applicable 4 4 2
Blank 135 12 70
449 Eyes-xerophthalmia
1 Yes 0 0 0
4 No 7323 1341 2762
8 Blank but applicable 4 4 2
Blank 135 12 70
450 Eyes-keratomalacia
1 Yes 0 0 0
4 No 7323 1341 2762
8 Blank but applicable 4 4 2
Blank 135 12 70
451 Eyes-pterygium
1 Yes 267 32 48
4 No 7056 1309 2714
8 Blank but applicable 4 4 2
Blank 135 12 70
452 Right eye-corneal lesion(s)
1 Yes 23 5 1
4 No 7243 1337 2756
8 Blank but applicable 56 3 7
Blank 140 12 70
453 Left eye-corneal lesion(s)
1 Yes 23 3 4
4 No 7243 1338 2751
8 Blank but applicable 56 3 7
Blank 140 13 72
454 Eyes-pupils
1 Right larger 18 4 12
2 Left larger 13 6 3
4 Equal 7281 1331 2738
8 Blank but applicable 5 3 9
Blank 145 13 72
455 Eyes-pupillary light reflex
1 Abnormal 32 13 20
4 Normal 7293 1328 2734
8 Blank but applicable 2 4 10
Blank 135 12 70
456 Right eye-globe absent See Note
22
1 Absent 5 0 0
Blank- Present or exam not
given 7457 1357 2834
457 Left eye-globe absent See Note
22
1 Absent 5 1 2
Blank- Present or exam not given7457 1356 2832
458 Right eye-ocular fundus-red reflex
1 Abnormal 15 3 8
4 Normal 7261 1314 2734
8 Blank but applicable 46 28 22
Blank 140 12 70
459 Left eye-ocular fundus-red reflex
1 Abnormal 12 0 8
4 Normal 7266 1317 2732
8 Blank but applicable 44 27 22
Blank 140 13 72
460 Right eye-lens opacities
1 Yes 58 16 18
4 No 7203 1301 2724
8 Blank but applicable 61 28 22
Blank 140 12 70
461 Left eye-lens opacities
1 Yes 58 19 23
4 No 7207 1299 2717
8 Blank but applicable 57 26 22
Blank 140 13 72
462 Right eye-fundus visualization See Note
23
1 Not visualized 254 66 219
Blank Visualized 7165 1277 2596
8 Blank but applicable 43 14 19
463 Left eye-fundus visualization See Note
23
1 Not visualized 276 69 231
Blank Visualized 7144 1276 2584
8 Blank but applicable 42 12 19
464 Right eye-ocular fundus-
narrow arterioles
1 Yes 110 2 6
4 No 6892 1263 2512
8 Blank but applicable 66 14 27
Blank 394 78 289
465 Left eye-ocular fundus-
narrow arterioles
1 Yes 149 11 32
4 No 6834 1252 2471
8 Blank but applicable 63 12 28
Blank 416 82 303
466 Right eye-ocular fundus-
tortuous arterioles
1 Yes 42 2 5
4 No 6952 1263 2513
8 Blank but applicable 74 14 27
Blank 394 78 289
467 Left eye-ocular fundus-
tortuous arterioles
1 Yes 41 1 5
4 No 6934 1262 2499
8 Blank but applicable 71 12 27
Blank 416 82 303
468 Right eye-ocular fundus-AV compression
1 Yes 25 0 11
4 No 6964 1265 2507
8 Blank but applicable 79 14 27
Blank 394 78 289
469 Left eye-ocular fundus-AV compression
1 Yes 27 0 15
4 No 6943 1263 2489
8 Blank but applicable 76 12 27
Blank 416 82 303
470 Right eye-ocular fundus-hemorrhage
1 Yes 4 0 0
4 No 6986 1265 2518
8 Blank but applicable 78 14 27
Blank 394 78 289
471 Left eye-ocular fundus-hemorrhage
1 Yes 4 0 0
4 No 6967 1263 2504
8 Blank but applicable 75 12 27
Blank 416 82 303
472 Right eye-ocular fundus-exudate
1 Yes 5 0 4
4 No 6983 1265 2515
8 Blank but applicable 80 14 26
Blank 394 78 289
473 Left eye-ocular fundus-exudate
1 Yes 3 0 6
4 No 6966 1263 2499
8 Blank but applicable 77 12 26
Blank 416 82 303
474 Right eye-ocular fundus-
venous engorgement
1 Yes 1 0 0
4 No 6987 1264 2519
8 Blank but applicable 80 15 26
Blank 394 78 289
475 Left eye-ocular fundus-
venous engorgement
1 Yes 2 0 0
4 No 6967 1262 2505
8 Blank but applicable 77 13 26
Blank 416 82 303
476 Right eye-ocular fundus-papilledema
1 Yes 0 0 1
4 No 6988 1265 2523
8 Blank but applicable 80 14 21
Blank 394 78 289
477 Left eye-ocular fundus-papilledema
1 Yes 0 0 1
4 No 6969 1263 2509
8 Blank but applicable 77 12 21
Blank 416 82 303
478 Right eye-ocular fundus-disc abnormal
1 Yes 3 1 10
4 No 6985 1264 2514
8 Blank but applicable 80 14 21
Blank 394 78 289
479 Left eye-ocular fundus-disc abnormal
1 Yes 3 2 7
4 No 6966 1261 2503
8 Blank but applicable 77 12 21
Blank 416 82 303
480-500 Blank 7462 1357 2834
2Vision Test Data
Position Item description Counts Source
and code M C P and notes
SECTION M. VISION TEST DATA - (POS 501-531)
Source: Vision Examination
Numbers in this
column other than
notes reflect the
preprinted circled
number shown on
source document
(Appendix 1)
501-504 Tape number
6507 7462 1357 2834
505 Vision exam blank See Note 24
1 Yes 3114 571 1118
2 No 4348 786 1716
506-508 Examiner number
105 - 557 4327 786 1713 VTF 102
888 21 0 3
Blank 3114 571 1118
509 Optotype VTF 104
1 Sloan letters 4237 778 1164
2 Landolt rings 72 5 27
8 Blank but applicable 39 3 525
Blank 3114 571 1118
DISTANCE VISION (POS 510-522)
510 Correction Worn VTF
105
1 Wears glasses for test 737 204 324
2 Wears contact lenses
for test 56 19 18
3 Forgot (glasses, contact
lenses) 190 41 115
4 Does not wear either glasses
or contact lenses for
distance vision 3343 517 1200
8 Blank but applicable 22 5 59
Blank 3114 571 1118
Visual Acuity
511-513 Both eyes without correction VTF 107
000 Not applicable 56 19 18 See Notes
25,26
015-160 Visual acuity
equivalent 4114 741 1622
at 20 feet
200 20/200 or worse 128 23 56
888 Blank but applicable 50 3 20
Blank 3114 571 1118
514-516 Left eye with correction if worn VTF
109
015-160 Visual acuity
equivalent 4264 778 1666 See Note
26
at 20 feet
200 20/200 or worse 51 5 19
777 Missing eye or prosthesis 4 0 5
888 Blank but applicable 29 3 26
Blank 3114 571 1118
517-519 Right eye with correction if worn VTF 111
015-160 Visual acuity
equivalent 4270 781 1665 See Note
at 20 feet 26
200 20/200 or Worse 47 2 20
777 Missing eye or
prosthesis 2 0 1
888 Blank but applicable 29 3 30
Blank 3114 571 1118
520-522 Both eyes with correction VTF
113
000 Not applicable 3533 558 1315 See
Notes
015-160 Visual acuity 25,26
equivalent 745 218 306
at 20 feet
200 20/200 or Worse 4 1 0
888 Blank but applicable 66 9 95
Blank 3114 571 1118
BINOCULAR VISION (POS 523-524)
523 50 cm VTF
114
1 Pass 3876 680 1527
2 Fail 387 101 145
8 Blank but applicable 85 5 44
Blank 3114 571 1118
524 100 cm VTF
115
1 Pass 3675 639 1480
2 Fail 504 142 188
8 Blank but applicable 169 5 48
Blank 3114 571 1118
NEAR VISION (POS 525-549)
525 Correction Worn VTF
116
1 Wears glasses for test 803 250 325
2 Wears contact lenses
for test 55 18 20
3 Forgot (glasses, contact
lenses) 239 63 110
4 Does not wear either
glasses or contact
lenses for near vision 3205 454 1200
8 Blank but applicable 46 1 61
Blank 3114 571 1118
Visual Acuity: Both eyes without correction
526-528 40 cm VTF
118
000 Not applicable 55 18 20 See Note
25
016-250 Visual acuity
equivalent 4065 739 1617
at 20 feet
333 20/333 or worse 30 25 23
888 Blank but applicable 198 4 56
Blank 3114 571 1118
Visual Acuity: Both eyes with correction
529-531 40 cm VTF
122
000 Not applicabale 3444 517 1310 See Note
25
016-167 Visual acuity
equivalent 818 267 337
at 20 feet
333 20/333 or worse 0 1 0
888 Blank but applicable 86 1 69
Blank 3114 571 1118
532-600 Blank
1GENERAL NOTES, SOCIODEMOGRAPHIC AND VISION DATA
2Family Questionnaire Missing
A Family Questionnaire was to be completed for each eligible family in a
household with sample persons. However, a few Family Questionnaires are
missing. Data records for sample persons in families with missing
questionnaires are flagged with a code = 1, and all family data are blank.
Data records for sample persons in families with a Family Questionnaire are
flagged with a code = 2.
During the Mexican-American portion of the HHANES survey, a Family
Questionnaire continuation booklet containing sample person information was
lost for one sample person. Therefore, the sociodemographic data for this
sample person are missing. The reference person, family composition,
income, residence, and household data for this person were obtained from
another person in the household.
2Examination Status
Not all sample persons consented to come to a Mobile Examination Center to
participate in the examination phase of the survey. In certain rare
instances (less than 0.1%), sample persons who came to the Mobile
Examination Centers did not participate in sufficient components of the
examination to be considered as "examined." This data field contains code =
1 for those persons who participated fully in the examination phase, and
code = 2 for those who did not come to the examination center or who did not
satisfactorily complete the examination.
2Family Number
In HHANES, all household members who were related by blood, marriage, or
adoption were considered to be one "family." All sample persons in the same
family unit have the same computer-generated family unit code.
2Head of Family
Relationship of Sample Person to Head of Family (Pos. 44-45)
Each family containing sample persons has a designated "head of
family," and the relationship of each sample person to the head of
his or her family is coded in tape positions 44-45. The first
three categories of this variable describe the "head" of three
different kinds of families.
o Code '01' identifies sample persons who lived alone (i.e.,
"head" of one-person families, no unrelated individuals living
in the household).
o Code '02' identifies sample persons who lived only with
unrelated persons.
o Code '03' identifies sample persons who were "heads" of families
containing at least one other person (whether or not the
household included additional families unrelated to the sample
person).
Sociodemographic Data (Pos. 100-131)
This data tape includes some sociodemographic data about the head
of each sample person's family (Section F). Because there can only
be one "head" per family, the data in this section (positions
100-131) are the same for all sample persons in the same family
(i.e., with the same family number codes in positions 39-43). If
the sample person is the head of his or her family, the data in
positions 100-131 are the same as in the corresponding positions in
Section E.
2Observed Race
"Race" was observed by the interviewer for all sample persons actually
seen. Rules for classification of observed race were consistent with those
used in the NHANES II and the National Health Interview Survey at that
time. The categories were coded as follows:
White Includes Spanish origin persons unless they are definitely
Black, Indian or other nonwhite.
Black Black or Negro.
Other Race other than White or Black, including Japanese, Chinese,
American Indian, Korean, Eskimo.
2National Origin or Ancestry
The value for national origin or ancestry is based on Item 2c in the
Household Screener Questionnaire and was reported by the household
respondent for all household members. In the Mexican-American portion of
the survey, if "other Latin-American or other Spanish" (code 9) or "Other"
(code 0) was recorded and the specified origin was "Spanish-American" or
"Spanish (Spain)", a code of 10 or 11, respectively, was assigned. In all
three portions of the survey, if more than one category was reported, the
first appropriate "Hispanic" code, if any, was assigned (codes 1, 2, 3, 8,
10, or 11 in the Mexican-American portion; codes 6 or 7 in the
Cuban-American portion; codes 4 or 5 in the Puerto Rican portion). If none
of these codes was recorded, the first category entered was coded.
2Codes for States and Foreign Countries
Code State or Foreign Country
001 Alabama
002 Alaska
004 Arizona
005 Arkansas
006 California
008 Colorado
009 Connecticut
010 Delaware
011 District of Columbia
012 Florida
013 Georgia
015 Hawaii
016 Idaho
017 Illinois
018 Indiana
019 Iowa
020 Kansas
021 Kentucky
022 Louisiana
023 Maine
024 Maryland
025 Massachusetts
026 Michigan
027 Minnesota
028 Mississippi
029 Missouri
030 Montana
031 Nebraska
032 Nevada
033 New Hampshire
034 New Jersey
035 New Mexico
036 New York
037 North Carolina
038 North Dakota
039 Ohio
040 Oklahoma
041 Oregon
042 Pennsylvania
044 Rhode Island
045 South Carolina
046 South Dakota
047 Tennessee
048 Texas
049 Utah
050 Vermont
051 Virginia
053 Washington
054 West Virginia
055 Wisconsin
056 Wyoming
060 American Samoa
093 Canada
061 Canal Zone
062 Canton and Enderbury Islands
091 Central America
095 Costa Rica
063 Cuba
064 Dominican Republic
065 El Salvador
062 Enderbury Islands
087 Germany
066 Guam
068 Guatemala
069 Haiti
088 Honduras
070 Jamaica
090 Japan
067 Johnston Atoll
080 Mexico
071 Midway Islands
081 Nicaragua
096 Palestine
097 Austria
098 Lebanon
099 Chile
100 Philippines
101 Brazil
102 Holland
103 Colombia
082 Panama
072 Puerto Rico
092 Saudi Arabia
083 Spain
094 Taiwan
089 Turkey
084 Uruguay
085 Venezuela
073 Ryukyu Islands, Southern
074 Swan Islands
075 Trust Territories of the Pacific Islands (includes Caroline,
Mariana and Marshall Island groups)
076 U.S. miscellaneous Caribbean Islands (includes Navassa
Islands, Quito Sueno Bank, Roncador Cay, Serrana Bank and
Serranilla Bank)
077 U.S. miscellaneous Pacific Islands (includes Kingman Reef,
Howland, Baker & Jarvis Islands, and Palmyra Atoll)
086 United States
078 Virgin Islands
079 Wake Island
104 Azores
105 Peru
106 England
107 Vietnam
108 Italy
109 Ecuador
110 North America
111 Surinam
112 Argentina
113 Portugal
114 Trinidad
115 Egypt
116 Sudan
117 British Honduras
118 China
888 Blank but applicable
2National origin recode
In the HHANES, if any household member was identified as "Hispanic" (as
defined below), all household members, regardless of origin, were eligible
to be selected as sample persons. The national origin recode specifies
whether a sample person is considered to be "Hispanic" or "not Hispanic" for
purposes of analysis. "Hispanic" is defined as:
Mexican-American, residing in selected counties of Texas, Colorado,
New Mexico, Arizona, and California;
Cuban-American, residing in Dade County (Miami), Florida; or
Puerto Rican, residing in the New York City area, including parts of
New Jersey and Connecticut
The recode was assigned as follows:
A. Southwest portion
1) If the original national origin or ancestry code on the Household
Screener Questionnaire was 1, 2, 3, 8, 10, or 11, then National
origin recode = 1;
2) If national origin or ancestry was 4, 5, 6, 7, 9, or 0 but the
person specified Mexican/Mexicano, Chicano, or Mexican-American
self-identification on the Adult Sample Person Questionnaire
(question M10), or the person was the biological child of a
household member with Recode equal to 1 (as determined by questions
A-1/A-11 on the Family Questionnaire), then National origin recode =
1;
3) In all other cases, National origin recode = 2.
B. Dade County, Florida portion
1) If the original national origin or ancestry code was 6 or 7, then
National origin recode = 1;
2) In all other cases, National origin recode = 2.
C. New York City area portion
1) If the original national origin or ancestry code was 4 or 5, then
National origin recode = 1.
2) If national origin or ancestry was 1, 2, 3, 6, 7, 8, 9, or 0 but the
person specified Boricuan or Puerto Rican self-identification on the
Adult Sample Person Questionnaire (question M10), or the person was
the biological child of a household member with Recode equal to 1
(as determined by questions A-1/A-11 on the Family Questionnaire),
then National origin recode = 1.
3) In all other cases, National origin recode = 2.
The national origin recode may be used in analysis in one of two ways:
a. Selecting on Recode = 1 will restrict analysis to "Hispanics" only.
In this case, in the Southwest portion of the survey, the weighted
estimates by age and sex will approximately equal U.S. Bureau of
Census population estimates of the number of Mexican Americans and a
small proportion of other Hispanics assumed to be Hispano in the
five Southwest States (Arizona, California, Colorado, New Mexico,
and Texas) at the midpoint of the Mexican-American portion of HHANES
- March 1983. The weighted estimates of Cuban Americans represents
an independent estimate of the number of Cuban Americans in Dade
County at the midpoint, February 1984. The weighted estimates of
Puerto Ricans represents an independent estimate of the number of
Puerto Ricans in the sample counties in New York, New Jersey, and
Connecticut at the midpoint of the Puerto Rican portion - September
1984.
b. Using Recode greater than 0, that is, all sample persons, will
include "Hispanic" and "not Hispanic" persons and the Southwest
weighted estimates by age and sex will overestimate the U.S. Bureau
of the Census population estimates of Mexican Americans and other
Hispanics by about 4.5 percent. In Dade County, using recode
greater than 0 will increase the weighted estimates by about 5.3
percent over that for Cuban Americans only, using recode greater
than 0 for the New York area will increase the weighted estimates by
about 9.2 percent over that for Puerto Ricans only.
2Industry and Occupation Code
Family Questionnaire questions B-12 through B-15 (see page 117 or 139 of
Ref. No 1 in Section C) identified sample persons 17 years old or older who
were in the labor force working for pay at a job or business or who worked
without pay in a family business or farm operated by a related member of the
household without receiving wages or salary for work performed.
Questions B-17 through B-22 provided a full description of sample persons'
current or most recent job or business. The detail asked for in these
questions was necessary to properly and accurately code each occupation and
industry. Interviewers were trained to define a job as a definite
arrangement for regular work for pay every week or every month. This
included arrangements for either regular or part-time or regular full-time
work. If a sample person was absent from his or her regular job, worked at
more than one job, was on layoff from a job or was looking for work during
the two week reference period, interviewers were trained to use the
following criteria to determine the job described:
a. If a sample person worked at more than one job during the two week
reference period or operated a farm or business and also worked for
someone else, the job at which he or she worked the most hours was
described. If the sample person worked the same number of hours at
all jobs, the job at which he or she had been employed the longest
was entered. If the sample person was employed at all jobs the same
length of time, the job the sample person considered the main job
was entered.
b. If a sample person was absent from his or her regular job all of the
two week reference period, but worked temporarily at another job,
the job at which the sample person actually worked was described,
not the job from which he or she was absent.
c. If a sample person had a job but did not work at all during the two
week reference period, the job he or she held was described.
d. If a sample person was on layoff during the two week reference
period, the job from which he or she was laid off, regardless of
whether a full-time or part-time job, was described.
e. If a sample person was looking for work or waiting to begin a new
job within 30 days of the interview, the last full-time civilian job
which lasted two consecutive weeks or more was described.
The 1980 census of population Alphabetical Index of Industries and
Occupations was used in the coding of both industry and occupation. This
book has Library of Congress Number 80-18360, and is for sale by the
Superintendent of Documents, U.S. Government Printing Office, Washington,
D.C. 20402 for $3.00. Its Stock Number is 003024049-2.
2Health Insurance
a. In the Health Insurance section of the Family Questionnaire, up to
three separate health insurance plans could be reported for a
family. Each sample person could have been covered by any
combination of the three, or by none at all. In order to simplify
the health insurance coverage data, the information on all reported
plans was combined to a single variable for each sample person,
i.e., whether or not the person is covered by any plan (position
74). For all persons covered by at least one plan, information on
the type of coverage is then indicated: position 75 specifies
whether any of the sample person's plans pays hospital expenses and
position 76 specifies whether any of the sample person's plans pays
doctor's or surgeon's bills.
b. For all sample persons who were not covered by Medicare or any
health insurance plan, the reasons for not being covered were
ascertained. Positions 77-78 contain the main or only reason
reported. For persons with one or more additional reasons, the
first (lowest) code entered on the questionnaire was coded in
positions 79-80.
2Per Capita Income
Per capita income was computed by dividing the total combined family income
by the number of people in the family.
2Poverty Index
The poverty index is a ratio of two components. The numerator is the
midpoint of the income bracket reported for each family in the Family
Questionnaire (E-11). Respondents were asked to report total combined
family income during the 12 months preceding the interview. The denominator
is a poverty threshold which varied with the number of persons in the
family, the adult/child composition of the family, the age of the reference
person, and the month and the year in which the family was interviewed.
Poverty thresholds published in Bureau of the Census reports* are based on
calendar years and were adjusted to reflect differences caused by inflation
between calendar years and 12 month income reference periods to which
question E-11 referred. Average Consumer Price Indexes for all Urban
consumers (CPI-U) for the calendar year for which the poverty thresholds
were published (see table below) and for the 12 months representing the
income reference period for the respondent were calculated. The percentage
difference between these two numbers represents the inflation between these
two periods and was applied to the poverty threshold appropriate for the
family (based on the characteristics listed above). For example, for a
family interviewed in November, 1983, the 1982 poverty threshold was updated
to reflect inflation by multiplying by the percent change in the average
CPI-U for the 12 month reference period, which would have been November,
1982 through October, 1983, over the calendar year January through December,
1982, in this example. To compute poverty indexes, the midpoint of the
total combined family income bracket was divided by the updated poverty
threshold.
*U.S. Bureau of the Census, Current Population Reports, Series P-60, No.
138, "Characteristics of the Population Below the Poverty Level: 1981",
U.S. Government Printing Office, Washington, D.C., March 1983.
U.S. Bureau of the Census, Current Population Reports, Series P-60, No.
144, "Characteristics of the Population Below the Poverty Level: 1982",
U.S. Government Printing Office, Washington, D.C., March 1984.
Average Consumer Price Index, all Urban consumers (CPI-U), U. S.,
city average, 1981-84
Month Year
1981 1982 1983 1984
January 260.5 282.5 293.1 305.2
February 263.2 283.4 293.2 306.6
March 265.1 283.1 293.4 307.3
April 266.8 284.3 295.5 308.8
May 269.0 287.1 297.1 309.7
June 271.3 290.6 298.1 310.7
July 274.4 292.2 299.3 311.7
August 276.5 292.8 300.3 313.0
September 279.3 293.3 301.8
October 279.9 294.1 302.6
November 280.7 293.6 303.1
December 281.5 292.4 303.5
Average 272.4 289.1 298.4
Source: U. S. Department of Labor, Bureau of Labor Statistics
Members of families with incomes equal to or greater than poverty thresholds
have poverty indexes equal to or greater than 1.0 and can be described as
"at or above poverty"; those with incomes less than the poverty threshold
have indexes less than 1.0 and can be described as "below poverty".
Poverty thresholds used were computed on a national basis only. No attempt
was made to adjust these thresholds for regional, State, or other variations
in the cost of living. None of the noncash public welfare benefits such as
food stamp bonuses were included in the income of the low income families
receiving these benefits.
2Size of Place and SMSA
Codes for size of place and SMSA were obtained from Bureau of Census summary
tape files (STF1B).
A place is a concentration of population. Most places are incorporated as
cities, towns, villages or boroughs, but others are defined by the Bureau of
the Census around definite residential nuclei with dense, city-type street
patterns, with, ideally, at least 1,000 persons per square mile. The
boundaries of Census defined places may not coincide with civil divisions.
A Standard Metropolitan Statistical Area (SMSA) is a large population
nucleus and nearby communities which have a high degree of economic and
social integration with that nucleus. Generally, an SMSA includes one or
more central cities, all urbanized areas around the city or cities, and the
remainder of the county or counties in which the urbanized areas are
located. SMSAs are designated by the Office of Management and Budget.
The same place size and SMSA codes were assigned to all persons in the same
segment (for the definition of segments see Ref. No. 1 in Section C). In a
few cases segments were divided by place boundaries. In these cases codes
were assigned after inspecting segment maps. If the segment was
predominantly in one place, then the place code for that place was used. If
the segment was approximately evenly divided, the code for the larger place
was used.
2Home Heating
Questions E-3 through E-6, pertaining to the main fuel and equipment used
for heating the home, appear to have codes which are inconsistent. It has
been verified that these are the codes that were recorded on the original
document; that is, codes that appear inconsistent were not incorrectly keyed.
2Ability to Read Blackboard from Back of Room
D1, D11: For some individuals there is an inconsistency between D1 and
D11. These were persons who were reported to have never had trouble seeing
with one or both eyes when not wearing glasses or contact lenses but were
reported as being unable to read the blackboard from the back of the
classroom. These records were looked up on microfilm and verified and not
changed.
2Use of Glasses or Contact Lenses
D6: Sunglasses, safety glasses or other kinds of lenses that were used for
purposes other than improving or correcting vision were not included.
2Responses specified in open-ended response categories
Some of the "other" or "specify" responses to this question were recoded to
existing categories, if possible. For responses that could not be recoded,
new code categories were created if the information was deemed analytically
useful. Caution should be used in interpreting the data from these new
categories because there is no way of knowing which other respondents would
have selected one of the new categories if given the option.
2Vision Test
D13: This includes any test in which the child was asked to read numbers or
letters from a chart or through a machine. It may or may not have included
a complete eye examination or have been part of a general check-up.
No change was made to correct an inconsistency between the demographic age
and the length of time since the vision was tested.
2Adult Sample Person Questionnaire Data Missing
In a few instances, data are not available from the ASPQ form because of
technical problems such as lost questionnaires, incorrect forms
administered, or forms filled out so inadequately that data were later
judged to be unreliable. For these two cases, tape positions 426-444 are
all blanks.
2Multiple Responses
D7, D8: The interviewer was instructed to mark all responses that apply.
As a result, each respondent may have more than one answer to this question.
2Blank Records
In this field a "1" indicates respondents who were included in the sample,
but did not receive a physical exam. Although positions 446-479 are blank,
demographic data are available for these respondents.
2Eye
The blank code has one of two meanings:
1) the respondent did not undergo a physical exam and consequently all
fields 446-479 are blank (see note 21); or
2) the eye was present.
2Fundus
The fundus was not visualized either due to physical reasons or lack of
patient cooperation.
2Vision Exam Missing
Not all sample persons who came to the mobile examination center to
participate in the examination phase of the survey were given a vision
examination. Reasons for noninclusion in the examination included
insufficient time for the examination, child crying or misbehaving, and
sample person having to leave. This data field contains code = '1' for
those persons who did not have a vision examination, and code = '2' for
those who were given a vision examination.
2Vision Exam Not Applicable
As explained in Section B, not all examinees were eligible for selected
portions of the vision examination. Contact lens wearers were not tested
without correction (VTF 107, 117, 118, 119, 120). Examinees who had no
corrective lenses, and those who forgot to bring them to the examination
center, could not be tested with correction (VTF 113, 121, 122, 123, 124).
These data fields were coded "000" for "Not applicable."
2Distance Visual Acuity Range of Testing
Distance visual acuity was tested to 20/400 in the first 13 stands and to
20/200 in subsequent stands. For comparability, distance visual acuity
equal to or poorer than 20/200 was recoded to 20/200 for all stands.
1APPENDIX 1 - VISION TEST EXAMINATION FORM
Form PHS 6214 7 OMB No. 0937-0078
9 8 82 Approval Expires 12/84
Vision Test Examination Form
NOTICE - Information con-
Department of Health and Human Services tained in this form which
Public Health Service would permit identification
Office of Health Research, of any individual or estab-
Statistics, and Technology lishment has been collected
National Center For Health Statistics with a guarantee that it
VISION TEST (507) will be held in strict con-
(AGES 6 - 74 YEARS) fidence, will be used only
HISPANIC HEALTH AND NUTRITION EXAMINATION SURVEY for purposes stated for
this study, and will not be
disclosed or released to
others without the consent
of the individual or the
establishment in accordance
with section 308(d) of the
Public Health Service Act
(42 USC 242m).
a. Age b. Sex c. Examiner No.
M
Yrs. F 102
CHECK ITEM A: 104 1 Sloan Letters Used
2 Landolt Rings Used
I. DISTANCE VISION
CHECK 105 1 Wears glasses for test
ITEM B: 2 Wears contact lenses for test
3 Forgot (glasses, contact lenses)
4 Does not wear either glasses or contact lenses for
distance vision
VISUAL ACUITY
Both eyes without correction ........................... 107 20/
START HERE IF SAMPLE NUMBER IS ODD:
2. Left eye with correction if worn ................... 109 20/
START HERE IF SAMPLE NUMBER IS EVEN:
3. Right eye with correction if worn .................. 111 20/
4. Both eyes with correction .......................... 113 20/
II. BINOCULAR VISION
Test using Random Dot E with both eyes and with glasses/contact lenses (if
examinee wears glasses/contact lenses).
Distance
cm Pass/Fail
50 cm ..................... 114 1 P 2 F
100 cm ..................... 115 1 P 2 F
III. NEAR VISION
CHECK 116 1 Wears glasses for test
ITEM C: 2 Wears contact lenses for test
3 Forgot (glasses, contact lenses)
4 Does not wear either glasses or contact lenses for
distance vision
VISUAL ACUITY
1. Both eyes without correction
30 cm 40 cm 50 cm 60 cm
117 20/ 118 20/ 119 20/ 120 20/
2. Both eyes with correction
30 cm 40 cm 50 cm 60 cm
121 20/ 122 20/ 123 20/ 124 20/
1APPENDIX 2 - VISION EXAMINATION EQUIPMENT AND PROCEDURES
2Introduction
Chapters 1, 2, 3, 4B and 5 are excerpted from Instruction Manual Part 15d,
Dental Examiner's Manual for the Hispanic Health and Nutrition Examination
Survey, 1982-84. Hyattsville, Maryland, 1986. Note that the referenced
figures were unavailable for reproduction. However, they can be obtained
upon request at the address given at the front of this documentation.
2Chapter 1
INTRODUCTION
Immediately after the dental examination is completed, the dentist will
administer the vision test to those scheduled to get it and record the
findings of the test on the vision test form. The dentist will then edit
the form for consistency and completeness. She/he will also fill out the
vision section of the Report of Findings I.
The vision test form is a two-page form consisting of three sections. The
top of the first page of the form contains space for identifying iformation
about the SP such as age and sex. The SP number will be stamped at the
bottom of each page of the form. In most cases the Coordinator will have
filled in Items a and b at the top of page one; however, if this has not
been done, the dentist will have to fill in these items. Items a and b can
be obtained from the Control Record. The dentist must record his/her
examiner's number in Item c. Check Item A indicated whether Sloan Letters
Vision Charts or Landolt Ring Vision Charts have been used for the exam.
Sloan Letters Charts contain alphabetic characters and should be used for
literate SPs. Landolt Ring Charts contain symbols and are used with
illiterate SPs. Check the Sample Person Questionnaire (Medical History) to
determine whether the SP is literate. Remember, some people will say they
can read when they cannot. This is especially true for young children. If
you begin the exam using the Sloan Letters and find the SP can't read, you
will have to switch to the Landolt Ring Charts. Review of medical histories
should be done before the arrival of the SPs for the session. The physician
will have the questionnaires. Be sure to check the appropriate box in Check
Item A.
The vision test parts should be done in the following order. First, test
near vision, then test binocularity of vision, and finally test far vision.
This order is important for two reasons. It minimizes the amount the SP has
to move around the dental room, which is very small, and it minimizes the
changes in lighting in the room to which the SP's eyes must adjust.
Before beginning the vision exam, explain to the SP that you are going to be
testing her/his vision for reading, seeing distances and focusing. Explain
that the tests will take about ten minutes.
2Chapter 2, Near Vision Test
3General
The near vision test involves determining visual acuity at up to four fixed
distances from 30 to 60 centimeters by having the SP read lines of letters
on the Sloan or Landolt charts for near vision. The near vision test will
be administered to all examinees ages 6-19 years and half the examinees ages
20-74 (those not in the glucose tolerance test subsample).
3Equipment
In order to perform the near vision test you will need the following
equipment:
Sloan letters acuity card for near vision
Landolt rings acuity card for near vision
Near vision test bar
Before discussing the procedures for administering the test, it is important
for the examiner to familiarize herself/himself with the equipment. The
near vision test bar is about 65 centimeters long with distances marked
along its side. It also has a sliding metal frame which holds the near
vision test card. There is a chin rest at one end of the bar. The SP
places his/her chin against this rest. When positioning the bar, make sure
the SP's eyes are on a vertical line with the zero mark on the distance
bar. Also, remember to have the SP place one hand on the bar to prevent the
slide from moving and hitting him/her. The bar provides a means of
conducting the test at standard distances.
The near vision test card contains the letters to be read by the SP. Notice
the distances listed along the left hand column of the card. Also note the
distance equivalents in terms of visual acuity on the right side of the card.
The first four lines of the card (lines 620 through 310) have between five
and ten letters in sequence across the card. If the SP reads these lines
she/he should try to read the entire line. The next three lines, 250-160,
also have ten letters but have a break in the middle. The entire line
should also be read if these lines are attempted by the SP. The remainder
of the card, lines 125 through 30, consists of 3 columns of five letters.
If an SP is being tested without correction, she/he should start on the left
side of the card and read the first ten letters (columns 1 and 2) on the
line. If the SP is being tested with correction, she/he should read the
second 10 letters on the line (columns 2 and 3). This prevents the SP from
memorizing the letters the first time through.
Finally, look at the near vision test recording form. Check Item C at the
top of the form contains information that will be used in analysis about
whether or not the SP wears glasses. We are only interested in glasses or
contact lenses worn to improve near vision in this part of the vision test.
If the SP wears glasses for near vision for the test, check the appropriate
box on the form.
The near vision form is actually divided into two main sections. Line
number one of the form contains space to record test results without
correction. The next line contains space to record visual acuity at four
different distance readings on the near vision test bar.
3Before the Test
1. Make sure the lights in the dental room are turned on for the near
vision exam.
2. Have the examinee get in a comfortable position for administering
the test. She/he should be seated on the dental chair.
3. Ask the examinee whether she/he wears glasses or contact lenses for
near vision. Mark the response in the appropriate answer box on the
near vision form.
4. Explain to the examinee that the purpose of the test is to see how
good her/his eyesight is for reading letters. Tell her/him to do
her/his best in reading each letter on a given line, and even if
she/he cannot identify all of the lettrs, she/he should read the
ones that she/he can.
5. If an SP wears glasses for near vision, test him/her with and
without correction. Test without correction first. Ask the SP to
remove her/his glasses for this first part of the test. (If an SP
wears contact lenses, she/he should not remove them. If the
contacts are for near vision, the SP will only be tested once rather
than twice.) Once the SP has been tested without correction, ask
her/him to put on her/his glasses. Repeat the test with corrective
lenses. If the SP is being tested without correction, you would
record the results on the line marked "Both eyes without
correction." If the SP is being tested with correction, you would
fill out the second line on the form.
3Administering the Test
1. Place the test card at a distance of 40 centimeters by moving the
metal slide on the near vision test bar (NVTB) to the 40 mark. Ask
the SP to rest her/his chin against the chin rest and hold the NVTB
with one hand.
2. Start the test by asking the SP to read the 20/20 line on the card.
a. Situation A, SP reads line correctly
If the SP reads the line with 3 or fewer errors, she/he has read
the line correctly. The SP is allowed to make a specified
number of errors in reading a line and still is considered to
have read the line correctly. Next ask the SP to try to read
the 20/16 line (one line down). This will determine whether the
SP's near vision acuity is better than 20/20. If the SP can
read this line, record this on the near vision test recording
form in the column headed 40 cm. If she/he fails to read the
20/16 line correctly, then her/his visual acuity is 20/20.
Record this on the recording form. If the SP can read the 20/20
line (or better) at 40 centimeters, go on to test the SP with
correction, if appropriate. If the SP does not wear corrective
lenses, or had to be tested only with corrective lenses (wears
contacts for near vision), the near vision test is completed
with the SP.
b. Situation B, SP cannot read line correctly
If the SP cannot read the 20/20 line at 40 centimeters, point to
the 20/30 lines (2 lines up) and ask the SP to read it. If the
SP reads this correctly (getting all letters correct or within
the acceptable number of errors), move down one line to see if
the SP's near vision acuity is better than 20/30 but not as good
as 20/20. If the SP fails to read the 20/30 line correctly,
move up 2 more lines to the 20/50 line and repeat the process.
Record the smallest line read correctly at 40 centimeters on the
data form in the column headed 40 cm. For example, if an SP
fails the 20/20 line and the 20/30 line, but reads the 20/50
line, you would ask him/her to read the 20/40 line. If the SP
reads this line correctly, this would be recorded on the form.
3. Data are recorded on the recording form by locating, across the top
of the form, the distance from the SP the card is being held. Thus
far, we have been talking about 40 centimeters. This is the second
column in this section. Simply write in the visual acuity on the
first line for both eyes without correction. Use lead zeros if
necessary. For example, if the SP's visual acuity is 20/40, it
should be recorded as 20/040. If the SP's visual acuity is 20/100,
no lead zero is necessary.
4. All SPs who cannot read the 20/20 line at 40 centimeters will also
be tested at 60, 50, and 30 centimeters. Begin by moving the metal
slide out to 60 centimeters. Ask the SP to read the 20/20 line.
Follow the procedures for administering and recording the test at 40
centimeters. Repeat for 50, 30 centimeters.
5. Once the SP has been tested without correction, repeat the test with
correction (wearing glasses). Begin at 40 centimeters and follow
the procedures outlined above.
2Chapter 3, Random Dot E Test
3Purpose
The Random Dot E (RDE) is used to test for binocularity of vision. It is
particularly useful for determining the presence of amblyopia and for
measuring stereoacuity thresholds, although it produces underestimates of
actual thresholds. All SPs who are eligible for the vision exam will be
given the RDE Test.
3Materials
In order to perform the RDE Test, you will need to use the following
materials:
Polarized glasses
Random Dot E test card with an E in stereo depth
Stereo blank card with no E, just a dotted background
A Model E card to be used during the explanation of the test
A dark shade that can be pulled down behind the SP to prevent glare on
the surface of the cards.
3Introduction to the Test
To better understand what is involved in the use of the RDE, put on the
polarized glasses and view the RDE card which is labeled on the back with
"RAISED" toward one edge of the card and "RECESSED" upside-down toward the
opposite edge of the card.
The cards are called stereograms. It is important to hold the stereogram so
that the long sides of the card are horizontal and the word "RAISED" is at
the top of the card. If the long sides of the card are held vertically, the
E may not be seen. If you have normal stereopsis, you will see the letter E
in stereo depth on the card. The E should appear to be raised up off the
test card. If you rotate the RDE card, so the word "RECESSED" is at the
top, the E will appear to sink into the background, making an E shaped
hole. During test administration, the RDE card should only be used with the
word "RAISED" at the top of the card.
Now look at the card labeled "STEREO BLANK" through the polarized glasses.
No E is seen, only the dotted background. To understand how the test would
work for someone who has a problem with binocular vision, hold the RDE and
STEREO BLANK cards side by side. Look at them through the polarized glasses
while you close one eye. The E should disappear and both cards will look
the same.
3Instructions for Administering the RDE Test
1. Turn on the lights in the dental exam room for the test. Pull down
the dark shade on the wall behind the SP. This will prevent any
glare or light reflections on the card. The SP should be sitting on
the dental chair.
2. Place the polarized glasses on the SP. If the SP wears prescription
glasses, do not have her/him remove them for the test. If you are
testing a child who is hesitant about putting on the glasses because
she/he doesn't wear glasses, try creating a game. Tell her/him that
they are "like sunglasses", or "special or magic glasses" and that
she/he has to wear them to see magic pictures. Make sure the
glasses are back on the SPs nose. If they slip forward, binocular
vision may be impaired. Similarly, the SP should keep her/his head
straight as tilting to one side will also interfere with the test.
3. Explain the test to the SP and let her/him practice until you are
sure she/he understands. Hold the Model E card up to the SP and ask
the SP what the figure is. If the SP cannot name it, tell her/him
that it is an E and ask if she/he can see it. Hold the RDE card
next to the STEREO BLANK card and ask the SP to tell you which card
has the E. If the SP cannot tell you which card has the E, repeat
the explanation process, put the cards behind your back and hold
them out of sight (underneath the back of the dental chair is a good
place) and shuffle them. Ask the SP to tell you on which card the E
is this time. Once the SP understands the process continue with the
test. Some SPs may not be completely literate. We have found that
children sometimes have trouble naming the letter. If the SP
appears to have a problem, simply tell her/him to indicate with
her/his hand which card contains the E or to tell you on which card
the three-legged table appears.
4. Perform the RDE test at two distances from the SP, 50 and 100
centimeters. In order to standardize the distance, we will be
placing tape marks on the dental chair or on the wall to show you
where to hold the cards from a fixed place on the dental chair. Ask
the SP to sit back against the far arm of the chair with her/his
back touching the counter in the dental room so that she/he is in
the correct position. Check to see that the chair is in the correct
position on the floor. There will be tape marks on the floor as
guides. Hold the RDE and STEREO BLANK cards side by side at about
50 centimeters from the SP and ask on which card the E appears.
Shuffle the cards as described above. Show the cards to the SP and
ask again where the E is located.
5. Repeat this process two more times at 50 centimeters. The SP should
be tested four times at each distance so you can identify guessing.
Once the process has been understood, the answer should be correct
every time if the SP has normal binocular vision.
6. Now hold the cards out at the 100 centimeter mark from the SP.
Perform the test at that distance 4 times. Remember to shuffle the
cards out of sight between each test administration. When you
shuffle the cards, be careful not to use any consistent pattern
since the SP may learn the pattern quickly and guess the correct
answer.
3Recording the Results
The space for recording the results of the binocular vision (RDE) test can
be found on page 2 of the vision test form. You will record whether the SP
passed or failed the test at 50 and 100 centimeters. In order to pass, the
SP must answer correctly all 4 times at a particular distance. If she/he
answers incorrectly even one time at a specified distance, she/he has failed
the test at that distance. Simply place a check in the appropriate box.
Only one box may be checked for each distance.
3Criteria for Referral
If the SP cannot distinguish the E in the RDE card at all or if she/he can
only see it when the card is 50 centimeters or closer, the SP should be
referred to an eye doctor for further testing. Use the procedure described
in Chapter 5 for this process.
2Chapter 4 A, The Distance Vision Test
3Note
NOTE: This chapter documents the distance vision test procedures and
equipment for the first 13 stand locations of the Mexican-American portion
of the survey.
3Introduction
The distance vision test determines visual acuity at a fixed distance of
either one or four meters by having the SP read lines of either the Sloan
Letters or Landolt Rings charts. The distance vision test is administered
to all SPs ages 6-74 years.
3Materials and Equipment
You will need the following materials to perform the distance vision exam.
o Illuminated wall charts with Sloan Letters (SL) I and II, wall charts
with Landolt Rings (LR)
o Distance vision recording form
o Eye cover (paddle)
o A dark shade that can be pulled down over the window
The illuminated wall charts which the SPs will read during the distance
vision test are located in two places in the dental room. Chart I, the
chart that will be used the most, is located on the wall (Wall A) to the
left as one enters the room. Chart II is located on the wall (Wall D) which
separates the room from the hallway, (the inside wall) next to the door.
See Exhibit 4-1. Chart I is viewed at a distance of four meters. Chart II
is viewed at a distance of one meter. Exhibit 4-2 depicts Chart II, the one
meter chart. Chart I is similar, only viewed at a farther distance.
The recording form for distance vision has space to record visual acuity for
four categories, (1) both eyes without correction, (2) the left eye with
correction (if applicable), (3) the right eye with correction and (4) both
eyes with correction (See Exhibit 4-11). Within each of these four
categories, the distance vision recording form is divided into two parts.
The left side of the form is used for recording when the SP reads Chart II,
the one meter chart. The right side of the form is used when the SP reads
Chart I, the four meter chart. The right and left sides of the form are
completed in the same way. If the SP reads Chart I, there is no need to
have her/him read Chart II, and the left side of the form will be blank.
The letters in column one on the recording form correspond to the letters on
the charts. Column two on the form lists the visual acuity, for example,
20/400, 20/320, 20/240. Column three on the form lists the acceptable
number of errors for the line. For example, if the SP were reading the one
meter chart line three (SRDVC OZKNH) she/he could read the line with three
errors and still read the line "correctly" since line three allows three
errors. Column four on the form provides boxes for you to check the
smallest line the SP reads correctly (within the acceptable number of
errors). The boxes are preceded by codes that will be used when the data
are computerized. You need not concern yourself with them.
Eye covers (paddles) are to be used when testing the right and left eyes
separately. The SP uses the paddle to cover the eye not being tested. It
is important to remind each SP not to push against his/her eye with the
paddle. This will temporarily blur her/his vision in the covered eye.
3Before Conducting the Distance Vision Exam
* Have the SP sit on the dentist's stool. Notice that there are marks
on the far wall (Wall B, Exhibit 4-1) of the dental exam room towards
the left corner. The stool should be positioned between these
marks. You will also notice that there is a mark on the wall
indicating about where the top of the SPs head should be. You will
need to raise or lower the examining stool so that the SP is at the
correct height.
* The SP will be facing the mirror located above the sink on wall C.
Chart I will be behind the SP on wall A. The SP will read the
reflection of the letters in Chart I in the mirror, not the chart
itself. This arrangement provides the distance needed for this test.
* Chart II will be to the right of the SP on wall D. If the SP needed
to read this chart, she/he will actually read the chart, not a
reflection.
* Determine whether you should be using the Sloan Letters (SP literate)
or Landolt Rings (SP illiterate). Generally, you should keep the
Sloan Letters Charts in the light box since you will be using these
the most. If the SP is illiterate, slide the Sloan Chart out of the
light box and replace them with the Landolt Rings Charts.
* Turn off the lights in the dental exam room and pull the shade down
over the window.
* Turn the light on in Charts box.
* Ask the SP if she/he wears glasses for distance vision. If she/he
does and has them available for the test, check #1 in Check Item B on
the form. If the SP wears contact lenses for distance vision, check
#2. You would not ask the SP to remove her/his contacts for the
test. You would only test the SP with corrective lenses in this case.
3Procedures for Conducting the Distance Vision Exam
* The distance vision exam should be conducted in the following order:
- For SPs with glasses
Both eyes uncorrected
Each eye (separately) corrected
Both eyes corrected
- For SPs without glasses/contacts
Each eye (separately-uncorrected)
Both eyes uncorrected
- For SPs with contact lenses (for distance vision)
Each eye (separately) corrected
Both eyes corrected
* Point to the 20/30 line on the eye Chart I and ask the SP to read
it. To the left of the letters on the eye chart are three numbers.
the first number tells you the visual acuity for the line at four
meters. In order to calculate the acuity for a line, multiply this
number by 20. The bottom line on the chart is 20/15 (.75 x 20), the
next line up is 20/20 (1 x 20), the third line up is 20/24 (1.2 x
20), and so on. Notice when you get to 20/40 (lines five and six
from the bottom) the SP must read two lines. This is true for the
remander of the chart, except for the top line. The number of
acceptable errors is based on the number of letters in the line. For
the 20/40 through 20/80 lines, this is two lines of five letters
each. Consequently, it is important for the SP to attempt all the
appropriate letters for the line.
* If the SP reads the 20/30 line correctly (within the acceptable
number of errors) have her/him read down successive lines on the
chart until she/he fails to read a line correctly. The acuity for
the smallest line read correctly should be recorded. For example, if
the SP reads the 20/30 line correctly, the 20/24 line and the 20/20
line but fails to read the 20/15 line, you would record 20/20 as the
SPs visual acuity.
* If the SP initially fails to read the 20/30 line correctly, point to
the 20/60 line and have her/him try to read it. If she/he reads that
line correctly, move down successive lines until the SP fails to read
a line correctly. Record the visual acuity for the smallest line
read correctly. If she/he cannot read the 20/60 line, have her/him
try the 20/100 line. If she/he can read the 20/100 line move down
until the SP fails to read a line correctly and record the visual
acuity for smallest line read correctly. After recording acuity,
move on to test the right or left eye. If the SP cannot read the
20/100 line or reads the 20/100 but not the 20/80 line correctly, go
to the one meter chart.
* The one meter chart is the same as the four meter chart except the
letters appear in a different order on each line. Also, the
difference in distance viewed changes the acuity readings for each
line. In order to calculate the acuity for a line, take the number
that appears in the third column of numbers to the left of the
letters and multiply by 20. For example, the visual acuity for the
bottom line at one meter is 20/60 (20 x 3). If the SP must switch to
the one meter chart, the right side of the distance vision form will
be blank and you will record on the left side.
* If the SP reads the 20/100 line on the one meter chart correctly,
have him/her move down a line. Record the acuity for the smallest
line reads correctly.
* If the SP cannot read the 20/100 line, have her/him try to read the
20/100 line on the one meter chart. Repeat the process until you
determine the smallest line which can be read correctly and record
the acuity for that line.
* Recording--You will record the same way whether you are using the one
meter or four meter chart. Once you have determined the smallest
line the SP can read correctly, find this on the recording form. You
can use either the first column on the form, the column showing the
letters as they appear on the chart, or column 2, the acuity level
(20/20, 20/60, etc.) to identify the appropriate line on the
recording form. Once you identify the line, place a check ( ) in the
box in column 4 across from the appropriate letters or acuity level.
You should have only one mark on the section of the form for
recording acuity for both eyes (uncorrected), one mark for the left
eye, one for the right eye and one for both eyes (corrected). As you
administer the test, place a horizontal line through any letters or
groups of letters that the SP misses or does not attempt. Also draw
a horizontal line directly below the smallest line attempted.
* After testing both eyes without correction, test the right and left
eyes separately with correction, if applicable. The right and left
eyes should be tested separately regardless of whether the SP wears
corrective lenses. Ask the SP to put her/his glasses back on. If
the SP's number is odd, begin with the left eye, if it is even, begin
with the right eye. Alternating whether the SP begins with the right
or left eye is important since the SP will be learning the order of
the letters each time she/he reads them. Alternating insures that
the reported acuity in one or the other eye will not systematically
be better. Follow the testing and recording procedures described
above.
* Finally, test both the SP's eyes with corrective lenses, if
applicable. Use the same testing and recording procedures described
above. If the SP does not wear corrective lenses, the distance
vision testing is completed.
* Exhibit 4-3 is an example of how to record the following test results
for SP number 34622:
- Both eyes - without correction - 20/24
- Errors in 20/30 line - C,D
- Errors in 20/24 line - C,O,D
- Errors in 20/20 line - O,S,D,C
3Editing the Form
4Near vision section
* Check to see that Check Item C is completed.
* If 1 is checked in Check Item C, both the right and left side of the
form should be completed.
* If 2 is checked in Check Item C, only the right side of the form
should be checked.
* If 3 or 4 is checked in Check Item C, only the left side of the form
should be completed.
* Check each line with acuity recorded. The acceptable number of
errors should equal the number of letters with horizontal lines
through them.
* If 40 centimeter distance = 20/20 or better, no other checkmarks
should appear on the form.
* If 40 centimeters = 20/25 or worse, results should also be recorded
for 30,50 and 60 centimeters.
4Random Dot E Test (Binocular Vision)
* Check to see that only one box is marked for each distance.
4Distance Vision Test
* Check to see that a, b, and c at the top of the form is completed.
* Make sure Check Items A and B are completed.
* If 1 is checked in Check Item B, acuity should be recorded for both
eyes, with and without correction and for the right and left eye with
correction.
* If 2 is checked, acuity should be recorded for both eyes with
correction, right and left eye with correction.
* If 3 or 4 is checked, acuity should be recorded for both eyes without
correction, right and left eye without correction.
* Within the recording tables, either the one meter or four meter chart
should be used. Only one acuity should be recorded.
* Check the line with acuity recorded, the acceptable number of errors
should equal the number of letters with horizontal lines through them.
2Chapter 4 B, Distance Vision Test
3Note
NOTE: This chapter documents the distance vision test procedures and
equipment for the total survey with the exception of the first 13 stand
locations of the Mexican-American portion of the survey.
3Introduction
The distance vision test determines visual acuity at a fixed distance of 4
meters by having the SP read lines of either the Sloan Letters or Landolt
Rings Charts. The distance vision test is administered to all examinees
ages 6-19 years and half the examinees ages 20-74 years (those not in the
glucose tolerance test subsample).
3Materials and Equipment
You will need the following materials to perform the distance vision exam.
Illuminated wall charts with Sloan Letters (SL) I, II, and III; wall
charts with Landolt Rings (LR) I, II, and III; and wall charts with
Sloan Letters reversed (SLR) I, II, and III
Eye cover (paddle)
Dark shade that can be pulled down over the window
Usually when vision is tested, individuals move closer or farther away to
read the far vision test charts. However, the exam room in the Medical
Examination Center does not have enough space to allow SPs to move the
appropriate distances from the chart. Consequently, charts with different
size letters will be used at a fixed distance, 4 meters. This should
approximate having the SP move closer or farther from the charts.
The Sloan Letters Reversed (SLR) Charts are the primary measurement device.
As in the case of near vision testing, the Landolt Rings Charts are used
with illiterate respondents. Both the SLR and Landolt Rings Charts are used
with the light box. The Sloan Letters Charts (SL) are used with a small
subsample of the SPs in an experiment designed to examine the effect of
using the mirror on the visual acuity data. The experiment, which will be
conducted in the x-ray room, is discussed in more detail at the end of this
section.
Each set of charts consists of three separate pages (charts), for example,
SLR I, II, and III. Begin the test with SLR I. This chart will test visual
acuity up to 20/100. If the respondent has to read the 20/100 line on this
chart, you will have to remove SLR I from the light box and replace it in
the light box with SLR II. The letters on this chart are bigger than those
on SLR I. This chart tests visual acuity up to 20/160. SLR III tests
acuity at 20/200 and must be slipped into the light box if the SP cannot
read SLR II. If the SP can read the SLR I, there is no need to have her/him
read SLR II or III. The illuminated wall charts which the SPs will read
during the distance vision test are located in two places in the dental
room. SLR I, the chart that will be used the most, is located on the wall
(Wall A) to the left as one enters the room. Chart II is located on the
wall to the left as one enters the room. SLR II and III, as well as LR I,
II and III are located in a packet in the dental room. SL I is also in the
x-ray room vision chart box and SL II and III and located in a packet in the
x-ray room. All charts are viewed at a distance of four meters either as a
linear distance or via a mirror.
The recording form for distance vision has space to record visual acuity for
four categories, (1) both eyes without correction, (2) the left eye with
correction (if applicable), (3) the right eye with correction (if
applicable), and (4) both eyes with correction. The form provides space to
enter the visual acuity, for example, 20/200, 20/100, 20/60, depending on
the smallest line the SP can read given the allowable number of errors. The
allowable number of errors an SP can make and still read the line correctly
is determined by the number of letters in the line. Each line (which may
consist of one or two rows on the chart) has either 6, 8, or 10 letters. If
there are 10 letters, the SP is allowed 3 errors. If there are 8 letters,
the SP is allowed 2 errors and with 6 letters the SP is allowed 1 error.
For example, if the SP were reading SL I, line 3 (SRDVC OZKNH), she/he could
make 3 errors and still read the line "correctly" since line 3 allows 3
errors. The lines on the data form are preceded by codes that will be used
when the data are computerized. You need not concern yourself with them.
Eye covers (paddles) are to be used when testing the right and left eyes
separately. The SP uses the paddle to cover the eye not being tested. It
is important to remind each SP not to push against his/her eye with the
paddle. This will temporarily blur his/her vision in the covered eye.
3Before Conducting the Distance Vision Exam
1. Have the SP sit on the dentist's stool. Notice that there are marks
on the far wall of the dental exam room towards the left corner.
The stool should be positioned between these marks. You will also
notice that there is a mark on the wall indicating about where the
top of the SPs head should be. You will need to raise or lower the
examining stool so that the SP is at the correct height.
2. The SP will be facing the mirror located above the sink on wall C.
SLR I will be on the wall behind the SP. The SP will read the
reflection of the letters in the mirror, not on the chart itself.
This arrangement provides the distance needed for this test.
3. SLR II and III and LR I, II, and III are to be read in the same
manner as SLR I.
4. Determine whether you should be using the Sloan Letters (SP
literate) or Landolt Rings (SP illiterate). Generally, you should
keep the SLR I in the light box since you will be using it the
most. If the SP is illiterate, slide the Sloan Chart out of the
light box and replace it with LR I.
5. Turn off the lights in the dental exam room and pull the shade down
over the window.
6. Turn the light on in the chart box.
7. Ask the SP if she/he wears glasses for distance vision. If she/he
does and has them available for the test, check Box 1 in Check Item
B on the form. If the SP wears contact lenses for distance vision,
check Box 2. You would not ask the SP to remove his/her contacts
for the test. You would only test the SP with corrective lenses in
this case.
3Procedures for Conducting the Distance Vision Test
1. The distance vision exam should be conducted in the following order:
a. For SPs with glasses
Both eyes uncorrected
Each eye (separately) corrected
Both eyes corrected
b. For SPs without glasses or contact lenses
Each eye (separately-uncorrected)
Both eyes uncorrected
c. For SPs with contact lenses (for distance vision)
Each eye (separately) corrected
Both eyes corrected
2. Point to the 20/30 line on SLR I and ask the SP to read it. To the
left of the letters on the eye chart are three numbers. The first
number tells you the visual acuity for the line at 4 meters. In
order to calculate the acuity for a line, multiply this number by
20. The bottom line on the chart is 20/15 (.75 x 20), the next line
up is 20/20 (1 x 20), the third line up is 20/24 (1.2 x 20), and so
on. The other two numbers that precede the lines of letters are
used to calculate visual acuity at other distances. Since we will
only be using one distance, 4 meters, these other numbers should be
disregarded. Notice when you get to 20/40 (lines 5 and 6 from the
bottom) the SP must read 2 lines. This is true for the remainder of
the chart, except for the top line. If the SP fails to read the
20/80 line correctly, move to SLR II since the top line on SLR I is
not a complete line. The number of acceptable errors is based on
the number of letters in the line. For the 20/40 through 20/80
lines, this is two lines of five letters each. Consequently, it is
important for the SP to attempt all the appropriate letters for the
line.
3. If the SP reads the 20/30 line correctly (within the acceptable
number of errors) have her/him read down successive lines on the
chart until she/he fails to read a line correctly. The acuity for
the smallest line read correctly should be recorded. For example,
if the SP reads the 20/30 line correctly, the 20/24 line and the
20/20 line but fails to read the 20/15 line, you would record 20/20
as the SPs visual acuity.
4. If the SP initially fails to read the 20/30 line correctly, point to
the 20/60 line and have her/him try to read it. If she/he reads
that line correctly, move down successive lines until the SP fails
to read a line correctly. Record the visual acuity for the smallest
line read correctly. If she/he cannot read the 20/60 line, have
her/him try the 20/80 line. If she/he cannot read this line
correctly, move down the chart until the SP fails to read a line
correctly and record visual acuity. If she/he cannot read the 20/80
line correctly, remove SLR I from the light box and replace it with
SLR II. Have the respondent try the 20/100 line on SLR II. Record
the visual acuity for the smallest line read correctly.
5. At no time is the top line of SLR I (20/100) considered a complete
line. It has only three letters. The bottom line of SLR II must be
used to test 20/100 vision.
6. Notice that each line on SLR II consists of two rows of three
letters each. The visual acuity for the line at 4 meters appears to
the left of the letters on the chart, 20/160, 20/120, and 20/100.
7. SLR III test for 20/200 visual acuity. If the SP cannot read the
20/160 line (top of SLR II) have him/her try SLR III (20/200).
8. Record findings the same way no matter what charts you are using.
Once you have determined the smallest line the SP can read
correctly, record the correct visual acuity for the line. You
should have only one entry on the line of the form for recording
acuity for both eyes (uncorrected), one entry for the left eye, one
for the right eye and one for both eyes (corrected). Record the
values by right-justifying the entries: that is, use a zero in the
first space when vision is better than 20/100, e.g., "20/020". If a
line is not used, for example, when the SP is wearing contact lenses
there is no value in the first line, fill in the spaces with
zeroes. This also applies when the SP does not wear corrective
lenses and the bottom line is not used.
9. The right and left eyes should be tested separately regardless of
whether the SP wears corrective lenses. Ask the SP to put her/his
glasses back on. If the SP's number is odd, begin with the left
eye, if it is even, begin with the right eye. Alternating whether
the SP begins with the right or left eye is important since the SP
will be learning the order of the letters each time she/he reads
them. Alternating insures that the reported acuity in one or the
other eye will not systematically be better. Follow the testing and
recording procedures described above.
10. Finally, test both the SP's eyes with corrective lenses, if
applicable or uncorrected for persons who do not wear glasses. Use
the same testing and recording procedures described above.
11. Use the same testing and recording procedures for the SL and Landolt
Ring Charts as for the SLR charts.
3Conducting the Distance Vision Experiment
The procedure involving the use of a mirror to approximate the 4-meter
distance needed to conduct the vision exam was designed by NCHS staff in
conjunction with representatives from the American Association of
Optometrists. The accuracy of the procedure has not been tested.
Consequently, NCHS is interested in conducting an experiment to determine
whether or not the use of the mirror distorts vision and thus effects visual
acuity in any way.
The experiment will be conducted in the x-ray room. A light box will be
placed in the room and the floor will be marked off at 4 meters. The Sloan
Letters (SL) or Landolt Ring (LR) Charts will be used to conduct this test.
One person who is eligible for the vision test will be randomly selected
from each exam session to participate in the distance vision experiment.
After SPs have arrived at the Medical Examination Center take the daily list
of SPs and number all eligible SPs. Use the random number table to randomly
select an SP. The random number table is made up of rows and columns of
numbers ordered randomly on the page. Enter the table randomly as discussed
in training and identify the entry point.
Your start point will be a one-digit number if fewer than ten SPs are
eligible, or a two-digit number if ten or more SPs are eligible. Move
vertically down the table number by number until you hit a number that
represents an eligible respondent. This SP will participate in the vision
test experiment.
Conduct the regular vision exam first. The SP should participate in at
least one other exam component before the distance vision experiment is
conducted. The experiment will need to be coordinated with the x-ray techs
since the x-ray room will be in use. The SP should stand at the 4 meter
line and attempt to read the SL I (or Landolt I) chart. The procedures for
testing distance vision, using the chart and recording visual acuity are the
same as those described for the SLR charts used in the regular vision exam.
If the SP cannot read the SL I (or Landolt I) chart, replace it in the light
box with the SL II (or Landolt II) chart. Use the SL III (or Landolt III)
chart the same way. Always begin with Chart I even if the SP needed to read
Chart II or III during the regular exam.
Record the results for the distance experiment on a second vision exam
form. Be sure to mark the top of the distance vision experiment form.
2Chapter 5, Other Responsibilities
3Editing the Form
1. Near vision section
a. Check to see that Check Item C is completed.
b. If 1 is checked in Check Item C, be sure both lines 1 and 2 are
completed.
c. If 2 is checked in Check Item C, be sure only line 2 is
completed.
d. If 3 or 4 is checked in Check Item C, be sure only line 1 is
completed.
e. If vision at the 40-centimeter distance is 20/20 or better, be
sure no other entries appear in this section.
f. If at 40 centimeters, vision is 20/25 or worse, see that results
are also recorded for 30, 50, and 60 centimeters.
2. Random Dot E test (binocular vision)
Check to see that only one box is marked for each distance.
3. Distance vision section
a. Check to see that a, b, and c at the top of the form are
completed.
b. Make sure Check Items A and B are completed.
c. If Box 1 is checked in Check Item B, be sure acuity is recorded
for both eyes, with and without correction, and for the right
and left eye with correction.
d. If 2 is checked, be sure acuity is recorded for both eyes with
correction, and right and left eye with correction.
e. If 3 or 4 is checked, be sure acuity is recorded for both eyes
without correction, right and left eye without correction.
f. Check to see that for each of the four entry lines, an entry
exists. If the SP did not wear glasses, zero-fill the space
marked both eyes with correction. If the SP wore contact
lenses, zero-fill the space marked both eyes without correction.
g. Check to see that all entries are righthand justified using a
zero to fill in the entry when the acuity is better than 20/100,
for example, 20/080.
3Using the Landolt Ring Charts
Landolt Ring Charts (symbols) are used to test illiterate SPs. Use these
charts in exactly the same way you use the Sloan Letter Charts. Use the
Landolt Rings to test near and distance vision; they are not applicable for
testing binocular vision. The Landolt Ring Charts contain the symbol "C"
instead of letters.
There are four types of rings, those with the opening pointing left, and
those with the opening pointing right, up and down. The rings are randomly
ordered on each line on the charts for distance and near vision testing.
To use the Landolt Rings you will need to have the SP look at the Landolt
Charts instead of those with the Sloan Letters. Using the "mask" you will
screen out all the symbols except the one you want the SP to "read". Simply
ask the SP to point in the direction the opening of the ring is pointing.
You will have to let the SP practice once or twice in order for her/him to
become familiar with the procedure. Use the recording form and determine
visual acuity exactly the same way you would if the Sloan Letters are used.
3Completing the Report of Findings
After conducting the vision test, fill in the sections of the Report of
Findings I that apply. Record acuity for the right eye and left eye
separately. Check whether the test results were obtained with the SP
wearing corrective lenses or not.
Next complete the section of the form for near vision test results. Report
results for acuity at 40 centimeters distance only, corrected if applicable.
3Referral
The Report of Findings which contains information about the results of the
near and far vision tests will be sent to the SPs health care provider 4 to
6 weeks after the exam. Furthermore, the physician will report any
conditions of the eye on the Report of Findings that she/he observes. The
physician will also be referring SPs who require eye care within 4 weeks of
the exam using special referral procedures. Consequently, it is unnecessary
for you to refer any SPs who have near or distance vision disorders for eye
care. The only exception to this is if an SP does not pass the Random Dot E
Test and has a problem with binocular vision. In that case, you should
notify the physician of the problem and ask him/her to prepare a Type II
Referral Letter which describes the problem and asks the SPs regular care
giver to refer the SP to a local ophthalmologist.
3Unusual Situations
If the SP is blind in both eyes, write this on the top of the vision exam
form and return it to the Coordinator.
If the SP is blind in one eye, but has vision in the other, place a large X
through the sections of the form that are inappropriate but administer the
tests for near and far vision for the eye with sight, following the
instructions that pertain to the test.
3Completing the Dental/Vision Log and Control Record
As you may recall, you are required to complete the required information in
the Dental/Vision Log for both the dental and vision exams. Fill in your
initials under vision test form for each completed exam and your initials
under Report of Physical Findings when you complete the appropriate section
of the report form. If you do not conduct the vision exam on a SP or a
problem arises during the exam, document this in the comments column.
You will also need to fill in the time in and out and your initials on the
Control Record.
1APPENDIX 3 - SPECTACLE READINGS EQUIPMENT AND PROCEDURES
2Purpose
There were two objectives in collecting the lensmeter data during the
Cuban-American and Puerto Rican portions of the survey. First, the
lensmeter data could be used to validate the acuity data at near and at
distance. Second, the lensmeter data could also be used to determine the
prevalence of myopia, hyperopia, and astigmatism for those people wearing
glasses and achieving 20/20 acuity.
2Materials
The following was used to perform the lensmeter test:
TOPCON Digital Projection Lensmeter, Model LM-P5.
2Procedure
Immediately after the other three portions of the vision exam were
completed, the dentist administered the lensmeter test to all examinees with
glasses. Glasses were placed into the lensmeter machine and a digital
display indicated the power of the lenses. The dentists had to turn dials
to focus images and then record the data from the lensmeter display screen
onto the Spectacle Reading recording form (see Appendix 1). The data was
recorded for the sphere, cylinder and axis of the lenses.
2Training and Monitoring
A manual was provided to the dentists to practice and understand the use of
the lensmeter test. The HHANES vision examination consultant, Dr. John
Whitener of the American Optometric Association, made a field site visit to
make sure the dentist-examiners were administering the test properly.
*U.S. GOVERNMENT PRINTING OFFICE: 1988 -240-95200016
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