Table 10.
Primary Causes of Incident Presenting and Best-Corrected VI Over 6 years
| Causes of VI∗ | Incident Presenting VI∗ (n = 530) |
Incident Best-Corrected VI∗ (n = 231) |
||
|---|---|---|---|---|
| Low Vision∗ (n = 507) | Blindness∗ (n = 23) | Low Vision∗ (n = 217) | Blindness∗ (n = 14) | |
| Undercorrected refractive error | 249 (49.1%) | 1 (4.3%) | N/A | N/A |
| Cataract | 196 (38.7%) | 19 (82.6%) | 155 (71.4%) | 9 (64.3%) |
| Diabetic retinopathy | 14 (2.8%) | 0 (0.0%) | 13 (6.0%) | 0 (0.0%) |
| Posterior capsular opacification | 13 (2.6%) | 1 (4.3%) | 8 (3.7%) | 2 (14.3%) |
| Age-related macular degeneration | 12 (2.4%) | 0 (0.0%) | 16 (7.4%) | 0 (0.0%) |
| Maculopathy | 5 (1.0%) | 0 (0.0%) | 10 (4.6%) | 0 (0.0%) |
| Myopia maculopathy | 5 (1.0%) | 0 (0.0%) | 2 (0.9%) | 0 (0.0%) |
| Glaucoma | 3 (0.6%) | 1 (4.3%) | 5 (2.3%) | 1 (7.1%) |
| Amblyopia | 2 (0.4%) | 0 (0.0%) | 2 (0.9%) | 0 (0.0%) |
| Corneal diseases | 2 (0.4%) | 0 (0.0%) | 2 (0.9%) | 0 (0.0%) |
| Retinal vein occlusion | 2 (0.4%) | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) |
| Pterygium | 1 (0.2%) | 1 (4.3%) | 0 (0.0%) | 1 (7.1%) |
| Others | 3 (0.6%) | 0 (0.0%) | 4 (1.8%) | 1 (7.1%) |
N/A = not applicable; VI = visual impairment.
Data are presented as number (percentage).
∗
Based on United States definition—low vision was defined as visual acuity (VA) < 20/40 but ≥ 20/200; blindness was defined as VA < 20/200, based on better-seeing eye.