Causes of poor outcome (presenting visual acuity <6/60)
| Cause of poor outcome | At 8–25 weekfollow up | At ⩾26 week follow up |
|---|---|---|
| Number of eyes | 143 | 42 |
| Pre-existing eye disease | 20% | 19% |
| Surgical complications | 17% | 14% |
| Inadequate optical correction | 55% | 24% |
| Long term complications | 8% | 43% |