Principal cause, by category, of visual loss in the better eye (presenting visual acuity)
| <6/12–6/18 | <6/18–6/60 | <6/60–3/60 | <3/60 | |
|---|---|---|---|---|
| n (%) | n (%) | n (%) | n (%) | |
| *In this analysis, a treatable condition was one in which an intervention existed to restore visual function or an intervention existed, if administered early, that prevented the consequences of established disease. A preventable cause was one in which a cost-effective intervention existed that prevented the condition from occurring in the first place. | ||||
| PCO, posterior capsule opacification. | ||||
| Treatable* | ||||
| Refractive error | 1047 (70.2) | 905 (42.7) | 17 (6.9) | 15 (2.7) |
| Cataract | 287 (19.2) | 883 (41.6) | 166 (67.8) | 289 (51.5) |
| Uncorrected aphakia | 23 (1.5) | 66 (3.1) | 13 (5.3) | 48 (8.6) |
| PCO | 15 (1.0) | 45 (2.1) | 11 (4.5) | 20 (3.6) |
| Glaucoma | 10 (0.7) | 36 (1.7) | 6 (2.4) | 40 (7.1) |
| Diabetic retinopathy | 4 (0.3) | 10 (0.5) | 1 (0.4) | 1 (0.2) |
| Total treatable | 1386 (93.0) | 1945 (91.7) | 214 (87.3) | 413 (73.6) |
| Preventable* | ||||
| Central corneal scar | 29 (1.9) | 55 (2.6) | 8 (3.3) | 66 (11.8) |
| Total avoidable | 1415 (94.9) | 2000 (94.3) | 222 (90.6) | 479 (85.4) |
| Unavoidable | ||||
| Phthisis/absent globe | 1 (0.1) | 3 (0.1) | 1 (0.4) | 15 (2.7) |
| Macular degeneration | 8 (0.5) | 21 (1.0) | 5 (2.0) | 12 (2.1) |
| Optic atrophy | 2 (0.1) | 5 (0.2) | 1 (0.4) | 5 (0.9) |
| Amblyopia | 10 (0.7) | 13 (0.6) | 2 (0.8) | 3 (0.5) |
| Other | 55 (3.7) | 79 (3.7) | 14 (5.7) | 47 (8.4) |
| Total unavoidable | 76 (5.1) | 121 (5.7) | 23 (9.4) | 82 (14.6) |
| Grand total | 1491 (100.0) | 2121(100.0) | 245 (100.0) | 561 (100.0) |