Cause | Blindness | Severe VI | Moderate VI | Early VI |
N (%) | N (%) | N (%) | N (%) | |
1. Refractive error | 1 (2.2) | 1 (2.3) | 59 (13.4) | 214 (44.7) |
2. Aphakia (uncorrected) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
3. Cataract untreated | 21 (45.7) | 34 (79.1) | 293 (66.6) | 202 (42.2) |
4. Cataract surgical complications | 3 (6.5) | 3 (7.0) | 36 (8.2) | 35 (7.3) |
5. Trachomatous CO | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
6. Non-trachomatous CO | 2 (4.3) | 2 (4.7) | 5 (1.1) | 0 (0.0) |
7. Phthisis | 1 (2.2) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
8. Onchocersiasis | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
9. Glaucoma | 4 (8.7) | 0 (0.0) | 1 (0.2) | 2 (0.4) |
10. Diabetic retinopathy | 0 (0.0) | 0 (0.0) | 3 (0.7) | 0 (0.0) |
11. ARMD | 2 (4.3) | 1 (2.3) | 7 (1.6) | 8 (1.7) |
12. Other PSD | 12 (26.1) | 2 (4.7) | 36 (8.2) | 17 (3.5) |
13. Globe/CNS abnormalities | 0 (0.0) | 0 (0.0) | 0 (0.0) | 1 (0.2) |
Total | 46 (100) | 43 (100) | 440 (100) | 479 (100) |
ARMD, age-related macular degeneration; CNS, central nervous system; CO, corneal opacity; PSD, posterior segment disease; VI, visual impairment.