Distribution of visual acuity (Snellen) by preterm and term groups and eye
| Acuity | Left | Right | ||
|---|---|---|---|---|
| Preterm | Control | Preterm | Control | |
| Significantly poorer visual acuity in the left or right eye in preterm infants (p = 0.007, p = 0.002 respectively; Mann-Whitney). | ||||
| 6/6 | 243 | 198 | 253 | 205 |
| 6/9 | 22 | 10 | 16 | 3 |
| 6/12 | 5 | 1 | 3 | 1 |
| 6/18 | 2 | 1 | 3 | 1 |
| 6/24 | 4 | 2 | ||
| 6/36 | 3 | 1 | ||
| 6/60 | 1 | |||
| Total | 279 | 210 | 279 | 210 |