Principal cause of blindness in eyes
| Principal cause | Eyes of bilaterally blind people | Eyes of unilaterally blind people | All blind eyes |
|---|---|---|---|
| No (%) | No (%) | No (%) | |
| PCO, posterior capsule opacification. | |||
| Cataract | 165 (64.5) | 152 (57.6) | 317 (60.5) |
| Refractive error | 34 (13.2) | 27 (10.2) | 61 (11.7) |
| Neglected cataract/secondary glaucoma | 1 (0.4) | 2 (0.8) | 3 (0.6) |
| PCO/after cataract | 2 (0.8) | 1 (0.4) | 3 (0.6) |
| Corneal opacity | 8 (3.1) | 30 (11.4) | 42 (8.0) |
| Surgical complication | 1 (0.4) | 1 (0.4) | 2 (0.4) |
| Globe disorder | 6 (2.3) | 12 (4.6) | 15 (2.9) |
| Glaucoma | 1(0.4) | 4 (1.5) | 5 (1.0) |
| Optic atrophy | 2 (0.8) | 4 (1.5) | 6 (1.2) |
| Vascular retinopathy | 1 (0.4) | 2 (0.8) | 3 (0.6) |
| Macular degeneration | 28 (10.9) | 17 (6.4) | 45 (8.7) |
| Amblyopia | 5 (2.0) | 5 (1.9) | 10 (2.0) |
| Retinal detachment | 2 (0.8) | 4 (1.5) | 6 (1.5) |
| Others | 0 | 3 (1.1) | 3 (0.6) |
| Total | 256 (100) | 264 (100) | 520 (100) |