Visual acuity at diagnosis a | Visual acuity at 6-year follow up a | Â | ||
---|---|---|---|---|
 | Normal | Moderately impaired | Blind | Total |
Normal | 720 (92.3) | 48 (6.2) | 12 (1.5) | 780 (96.7) |
Moderately impaired | 14 (56.0) | 5 (20.0) | 6 (24.0) | 25 (3.1) |
Blind | 0 (0) | 1 (50.0) | 1 (50.0) | 2 (0.2) |
Total | 734 (90.9) | 54 (6.7) | 19 (2.4) | 807 (100) |