Codes and Frequencies
An 'X' indicates the category is available for that sample
| Code | Label |
23
|
17
|
16
|
08
|
02
|
90
|
|---|---|---|---|---|---|---|---|
| 0 | NIU | X | X | X | X | X | X |
| 1 | No | X | X | X | X | X | X |
| 2 | Yes | X | X | X | X | X | X |
| 7 | Unknown-refused | X | · | · | · | X | · |
| 8 | Unknown-not ascertained | X | · | · | · | · | · |
| 9 | Unknown-don't know | X | X | X | · | X | X |
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Description
For sample adults, VDEVICE indicates if the individual uses an adaptive device for vision problems, such as magnifiers, talking materials or canes or other special equipment for vision problem. Please see the Universe tab for more information on changes in universe over time.
[show more]The Field Representative's Manuals do not state that glasses or contacts should be excluded, and the survey text mentions devices, "such as telescopic or other prescriptive lenses, magnifiers, large print or talking materials, CCTV, white cane, or guide dog."
This variable is included in the Sample Adult Vision Supplement, sponsored by the National Eye Institute.
Comparability
The definition of eyeglasses, as discussed above, the 1990 survey allowed proxy reporting of this variable, wherein the sample person answered this question for other family members. Generally, self-reports are deemed more accurate than proxy reports, but the visibility of adaptive devices to other family members would seem to increase the accuracy of proxy report.
In addition to changes in universe, the NHIS questionnaire was substantially redesigned in 2019 to introduce a different data collection structure and new content. For more information on changes in terminology, universes, and data collection methods beginning in 2019, please see the user note..
Universe
- 1990: Persons who did not refuse to complete assistive devices supplement.
- 2002: Sample adults age 18+ who have trouble seeing even when wearing glasses or who have had diabetic retinopathy, cataracts, glaucoma, or macular degeneration in the past 12 months.
- 2008; 2016; 2017; 2023: Sample adults 18+ who have trouble seeing.
Availability
- 1990, 2002, 2008, 2016-2017, 2023
Weights
- 2002, 2008, 2016-2017, 2023 : SAMPWEIGHT
- 1990 : SUPP2WT
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