Principal cause of blindness, severe visual impairment and visual impairment in persons (presenting vision) in Taif
| Blind (VA <3/60) | Severe visual impairment (VA<6/60—≥3/60) | Visual impairment (VA<6/18—≥6/60) | |
| n % | N % | n % | |
| Refractive error | 1 (1) | 6 (11) | 85 (37) |
| Cataract, untreated | 32 (41) | 24 (45) | 81 (35) |
| Aphakia uncorrected | 2 (3) | 0 (0) | 0 (0) |
| Cataract surgical complications | 1 (1) | 7 (13) | 11 (5) |
| Trachoma | 1 (1) | 0 (0) | 1 (0.4) |
| Phthisis | 2 (3) | 0 (0) | 0 (0) |
| Other corneal scar | 5 (6) | 1 (2) | 15 (7) |
| Total avoidable* | 44 (56) | 38 (72) | 193 (84) |
| Diabetic retinopathy | 8 (10) | 8 (15) | 19 (8) |
| Other posterior segment | 27 (34) | 7 (13) | 18 (9) |
| Total posterior segment | 35 (44) | 15 (28) | 37 (16) |
↵* Cataract (including unoperated and postoperative complications), refractive error, trachoma, and other causes of corneal scars.