Table 2. Causes of visual impairment in the participants based on presenting and best corrected vision.
| Causes of visual impairment |
Presenting visual acuity |
Best corrected visual acuity |
||
|---|---|---|---|---|
| n | % | n | % | |
| Uncorrected refractive error | 75a | 63.9 | 0 | — |
| Cataract | 24b | 20.2 | 17 | 42.5 |
| Corneal opacity | 1 | 0.8 | 2 | 5.0 |
| Chorioretinal atrophy | 2 | 1.7 | 1 | 2.5 |
| Retinitis pigmentosa | 3 | 2.5 | 3 | 7.5 |
| Macular oedema | 2 | 1.7 | 0 | 0 |
| Albinism | 1 | 0.8 | 2 | 5.0 |
| Optic atrophy | 1 | 0.8 | 3 | 7.5 |
| Amblyopia | 7 | 5.9 | 5 | 12.5 |
| Keratoconus | 0 | 0 | 2 | 5.0 |
| Macular atrophy | 0 | 0 | 1 | 2.5 |
| Other | 2 | 1.7 | 4 | 10.0 |
| Total | 118 | 100 | 40 | 100 |
a
Three cases had pseudophakia.
b
Two cases had pseudophakia.