Causes of visual impairment among people with and without diabetes
| Blindness | Severe VI | Moderate VI | Early VI | |||||
| DM | Non-DM | DM | Non-DM | DM | Non-DM | DM | Non-DM | |
| n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | |
| Refr. error | 0 (0) | 1 (2) | 0 (0) | 1 (2) | 12 (14) | 47 (13) | 46 (40) | 168(46) |
| Cataract | 3 (50) | 18 (45) | 8 (100) | 26 (74) | 57(67) | 236 (66) | 50 (43) | 152(41) |
| DR | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 3 (3) | 0 (0) | 0 (0) | 0 (0) |
| PSD | 1 (16) | 17 (42) | 0 (0) | 3 (8) | 7 (8) | 37 (10) | 9 (7) | 18 (4) |
| Other | 2 (33) | 4 (10) | 0 (0) | 5 (14) | 5 (5) | 36 (10) | 9 (7) | 27(7) |
| Total | 6 (100) | 40 (100) | 8 (100) | 35 (100) | 84 (100) | 356(100) | 114(100) | 365 (100) |
DM, diabetes mellitus; DR, diabetic retinopathy; PSD, posterior segment disorder.