Table 3. Causes of visual disability.
| Cause | Overall | Urban | Rural |
| Cataract | 1381 (55.7) | 295 (55.3) | 1086 (55.5) |
| Retinal disease | 236 (9.5) | 183 (34.3) | 53 (2.7)b |
| Corneal pathology | 161 (6.5) | 21 (3.9) | 140 (7.2)b |
| Optic neuropathy | 149 (6.0) | 38 (7.1) | 111 (5.7) |
| Hereditary/congenital | 117 (4.7) | 23 (4.3) | 94 (4.8) |
| Glaucoma | 96 (3.9) | 20 (3.8) | 76 (3.9) |
| Degenerative myopia | 79 (3.2) | 29 (5.4) | 50 (2.6)b |
| Trauma | 66 (2.7) | 19 (3.6) | 47 (2.4) |
| Miscellaneous | 65 (2.6) | 7 (1.3) | 58 (3.0)a |
| Trachoma | 46 (1.9) | 9 (1.7) | 37 (1.9) |
| Amblyopia | 43 (1.7) | 13 (2.4) | 30 (1.5) |
| Unknown | 33 (1.3) | 6 (1.1) | 27 (1.4) |
| Intoxication | 7 (0.3) | 0 | 7 (0.4) |
| Total | 2479 | 533 | 1946 |
aP<0.05, bP<0.01 vs Urban
n(%)