Visual acuity and frequency of distorted vision at baseline, 6, 12, 18, and 24 months
| Initial visit No (%) of eyes | At 6 months No (%) of eyes | At 12 months No (%) of eyes | At 18 months No (%) of eyes | At 24 months No (%) of eyes | |
|---|---|---|---|---|---|
| Visual acuity: | |||||
| < 20/200 | 50/231 (21.6) | 45/231 (19.4) | 31/154 (20.1) | 21/94 (22.3) | 11/55 (20) |
| 20/200–20/50 | 144/231 (62.4) | 137/231 (59.3) | 90/154 (58.4) | 47/94 (50) | 29/55 (52.7) |
| 20/40–20/25 | 37/231 (16) | 49/231 (21.2) | 33/154 (21.5) | 26/94 (27.6) | 15/55 (27.2) |
| Metamorphopsia: | 187/231 (80.9) | 81/231 (35) | 33/154 (21.4) | 14/94 (14.8) | 10/55 (18.1) |
| A <20/200 | 28/231 (12.1) | 15/231 (6.5) | 6/154 (3.9) | 3/94 (3.2) | 1/55 (1.8) |
| A ⩾20/200 | 159/231 (68.8) | 66/231 (28.5) | 27/154 (17.5) | 11/94 (11.7) | 9/55 (16.3) |