Table 6.
Causes of severe visual impairment
| Causes | Males
|
Females
|
All
|
|||
|---|---|---|---|---|---|---|
| n | % | n | % | n | % | |
| Principal causes of severe visual impairment in people:: PVA <6/60–3/60 | ||||||
| Refractive error | 1 | 3.7 | 0 | 0.0 | 1 | 1.8 |
| Cataract | 25 | 92.6 | 29 | 100.0 | 54 | 96.4 |
| Non-trachomatous corneal opacity | 1 | 3.7 | 0 | 0.0 | 1 | 1.8 |
| Total | 27 | 100.0 | 29 | 100.0 | 56 | 100.0 |
| Principal causes of moderate visual impairment in people: PVA <6/18–6/60 | ||||||
| Refractive error | 53 | 40.5 | 33 | 24.3 | 86 | 32.2 |
| Cataract | 73 | 55.7 | 99 | 72.8 | 172 | 64.4 |
| Cataract surgical complications | 3 | 2.3 | 1 | 0.7 | 4 | 1.5 |
| Trachomatous corneal opacity | 0 | 0.0 | 1 | 0.7 | 1 | 0.4 |
| Non-trachomatous corneal opacity | 0 | 0.0 | 1 | 0.7 | 1 | 0.4 |
| Glaucoma | 1 | 0.8 | 0 | 0.0 | 1 | 0.4 |
| Other posterior segment disease | 0 | 0.0 | 1 | 0.7 | 1 | 0.4 |
| All other globe/CNS abnormalities | 1 | 0.8 | 0 | 0.0 | 1 | 0.4 |
| Total | 131 | 100.0 | 136 | 100.0 | 267 | 100.0 |
Abbreviations: CNS, central nervous system; PVA, presenting visual acuity.