Questionnaire to evaluate vision associated limitations in daily activities (VALDA)
| Do you have a problem with: |
|---|
| (1) poor vision that cannot be corrected with glasses? |
| (2) driving at night? |
| (3) driving during the daytime? |
| (4) watching television? |
| (5) recognising people? |
| (6) seeing traffic signs? |
| (7) reading newspapers? |
| (8) seeing steps? |
| (9) bumping into things? |
| (10) doing daily activities at home? |
| (11) doing outdoor activities? |
Each item had four possible answers: always, frequently, seldom, or never. VALDA was considered to be present when the answer was “always” or “frequently” in two or more of the items. Ordinal values were assigned to the responses (always or frequently = 1, seldom or never = 0). Limitation in daily activities was considered present when the score of VALDA was more than one.