Causes of blindness by sex (OES 1997)
| Causes | Male | Female | Frequency | % |
|---|---|---|---|---|
| Anterior segment causes | 11 | 33 | 44 | 31.6 |
| Trachomatous corneal opacities | 8 | 25 | 33 | 23.7 |
| Non-trachomatous corneal opacities | 3 | 8 | 11 | 7.9 |
| Causes related to lens | 17 | 25 | 42 | 31.3 |
| Unoperated cataract | 17 | 24 | 41 | 30.5 |
| Uncorrected aphakia | 0 | 1 | 1 | 0.8 |
| Posterior segment causes | 13 | 22 | 35 | 27.8 |
| Glaucoma | 5 | 11 | 16 | 11.5 |
| Optic atrophy | 6 | 1 | 7 | 5.0 |
| Macular degeneration | 1 | 3 | 4 | 2.9 |
| Retinal detachment | 0 | 2 | 2 | 1.5 |
| Congenital anomalies | 0 | 2 | 2 | 1.5 |
| Vascular retinopathies | 1 | 0 | 1 | 0.8 |
| Refractive error | 0 | 2 | 2 | 1.5 |
| Uveitis | 0 | 1 | 1 | 0.8 |
| Disorganised/absent globe | 6 | 7 | 13 | 9.5 |
| All causes | 49 | 85 | 134 | 100 |