Causes of visual impairment based on presenting and best corrected visual acuity*
| Causes | Best corrected visual acuity | Presenting visual acuity |
|---|---|---|
| *Number (%). | ||
| †Trauma, absent globe, diabetic retinopathy, optic nerve hypoplasia. | ||
| Refractive errors | − | 45 (33.6) |
| Cataract | 27(36.0) | 34 (25.4) |
| Amblyopia | 8 (10.7) | 11 (8.2) |
| Macular degeneration | 15 (20.0) | 17 (12.7) |
| Corneal opacity | 5 (6.7) | 5 (3.7) |
| Vascular retinopathy | 3 (4.0) | 3 (2.2) |
| Glaucoma | 2 (2.7) | 3 (2.2) |
| Optic atrophy | 2 (2.7) | 3 (2.2) |
| Keratoconus | 2 (2.7) | 3 (2.2) |
| Others† | 11 (14.7) | 10 (7.5) |
| Total | 75 | 134 |