Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.
From the 2008 National Health Interview Survey:
Do you use any adaptive devices such as telescopic or other prescriptive lenses, magnifiers, large print or talking materials, CCTV, white cane, or guide dog?
[NUMERATOR AND DENOMINATOR:]
Do you have any trouble seeing, even when wearing glasses or contact lenses?
Persons who respond "yes" to having trouble seeing and use any vision rehabilitation service meet the criteria for this objective.
This Indicator uses Age-Adjustment Groups:
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