Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Causes of visual impairment in the participants based on age group
| Age (yr) | Uncorrected refractive errors | Cataract | Amblyopia | AMD | Glaucoma | Macular edema | Corneal opacity | Optic atrophy | Other |
|---|---|---|---|---|---|---|---|---|---|
| % | % | % | % | % | % | % | % | % | |
| <20 | 78.6 | 0 | 21.4 | 0 | 0 | 0 | 0 | 0 | 0 |
| 20–39 | 87.8 | 0 | 0 | 0 | 0 | 0 | 4.9 | 0 | 7.3 |
| 40–59 | 51.5 | 27.3 | 3.0 | 0 | 3.0 | 3.0 | 3.0 | 0 | 9.1 |
| >=60 | 30.3 | 50.0 | 0 | 12.1 | 3.0 | 1.5 | 0 | 1.5 | 1.5 |
