Causes of blindness, severe visual impairment and visual impairment in people with available correction
| Bilateral blindness, VA <3/60 (n = 143) | Bilateral severe visual impairment, VA between <6/60 and ⩾3/60 (n = 78) | Bilateral visual impairment,VA between<6/18 and ⩾6/60 (n = 408) | |
|---|---|---|---|
| VA, visual acuity. | |||
| Values are n (%). | |||
| Refractive error | 1 (0.7) | 4 (5.1) | 216 (52.9) |
| Cataract, untreated | 113 (79.0) | 61 (78.2) | 171 (41.9) |
| Aphakia, uncorrected | 2 (1.4) | 0 | 1 (0.2) |
| Surgical complications | 2 (1.4) | 1 (1.3) | 1 (0.2) |
| Phthysis | 1 (0.7) | 0 | 1 (0.2) |
| Other corneal scar | 5 (3.5) | 0 | 1 (0.2) |
| Posterior segment | 19 (13.3) | 12 (15.4) | 16 (3.9) |
| Globe abnormalities | 0 | 0 | 1 (0.2) |
| Avoidable blindness | 124 (86.7) | 66 (84.6) | 391 (95.8) |