| Negros | Antique | |||||
| Bilateral Blindness (VA<3/60) | Bilateral severe visual impairment (VA<6/60 to ⩾3/60) | Bilateral visual impairment (VA<6/18 to ⩾6/60) | Bilateral Blindness (VA<3/60) | Bilateral severe visual impairment (VA<6/60 to ⩾3/60) | Bilateral visual impairment (VA<6/18 to ⩾6/60) | |
| n = 72 | n = 40 | n = 306 | n = 95 | n = 39 | n = 233 | |
| Refractive error | 3 (4%) | 5 (13%) | 164 (54%) | 0 | 5 (13%) | 129 (55%) |
| Cataract, untreated | 39 (54%) | 30 (75%) | 118 (39%) | 60 (63%) | 28 (72%) | 88 (37%) |
| Aphakia, uncorrected | 1 (1%) | 0 | 2 (1%) | 0 | 0 | 0 |
| Surgical complications | 1 (1%) | 0 | 2 (1%) | 1 (1%) | 0 | 1 (0.4%) |
| Phthysis and corneal scar | 4 (6%) | 0 | 1 (0.3%) | 17 (18%) | 1 (3%) | 3 (1%) |
| Posterior segment | 22 (31%) | 4 (10%) | 18 (6%) | 15 (16%) | 5 (13%) | 12 (6%) |
| Globe abnormalities | 2 (3%) | 1 (3%) | 1 (0.3%) | 2 (2%) | 0 | 0 |
| Avoidable blindness | 48 (67%) | 35 (88%) | 286 (94%) | 78 (82%) | 34 (87%) | 221 (95%) |