| Characteristics | Value |
| Sex, n (%) | |
| male | 24 (37) |
| female | 41 (63) |
| total | 65 (100) |
| Age (yr) | |
| mean ± SD | 73.5 ± 8.9 |
| Eyes, n (%) | |
| right | 59 (49.6) |
| left | 60 (50.4) |
| total | 119 (100) |
| Time since surgery | |
| mean (yr) | 5.3 |