Table 6.
Causes for visual impairment following cataract surgery in rural and urban population
| Causes for visual impairment | Visal acuity (<20/60 to ≤20/400)Number of eyes (%)(Rural*, Urban) | Visual acuity (<20/400)Number of eyes (%)(Rural*, Urban) | ||
|---|---|---|---|---|
| Pseudophakia | Aphakia | Pseudophakia | Aphakia | |
| Uncorrected refractive error | 175 (73.2) (114,61) | 58 (36.9) (46,12) | 22 (30.1) (17,5) | 76 (47.2) (58,18) |
| Retinal pathology | 6 (2.5) (3,3) | 15 (9.6) (12,3) | 14 (19.2) (5,9) | 14 (8.7) (9,5) |
| Corneal pathology | 3 (1.3) (2,1) | 3 (1.9) (2,1) | 9 (12.3) (7,2) | 19 (11.8) (14,5) |
| Posterior capsule opacification | 28 (11.7) (19,9) | 3 (1.9) (2,1) | 11 (15.1) (9,2) | 8 (5.0) (4,4) |
| Glaucoma | 5 (2.1) (1,4) | 6 (3.8) (4,2) | 6 (8.2) (3,3) | 11 (6.8) (9,2) |
| Cystoid macular edema | 12 (5.0) (7,5) | 37 (23.6) (31,6) | Nil | 7 (4.3) (5,2) |
| Optic atrophy | 3 (1.3) (3,0) | 5 (3.2) (5,0) | 3 (4.1) (1,2) | 12 (7.5) (8,4) |
| Unexplained | 1 (0.4) (1,0) | 4 (2.5) (4,0) | Nil | 6 (3.7) (4,2) |
| Others | Nil | 6 (3.8) (2,4) | 4 (5.5) (2,2) | 2 (1.2) (0,2) |
| Dull foveal reflex | 2 (0.8) (1,1) | 14 (8.9) (12,2) | 2 (2.7) (1,1) | 3 (1.9) (3,0) |
| Poor cataract surgery | 4 (1.7) 4,0) | 6 (3.8) (5,1) | 2 (2.7) (1,1) | 3 (1.9) (0,3) |
| Total | 239 | 157 | 73 | 161 |
*
-In 13 eyes of rural population the anterior segment details could not be visualized due to the gross distortion of the eyeball anatomy following cataract surgery