Severity of retinopathy in right and left eyes on the day of first treatment
| Severity category | Number of right eyes treated (% of 327) | Number of left eyes treated (% of 327) | Same severity in both eyes (% of 327) |
|---|---|---|---|
| AP-ROP | 27 (8.26) | 27 (8.26) | 27 (8.26) |
| Type 1 | 204 (62.39) | 202 (61.77) | 174 (53.21) |
| Type 2 plus | 74 (22.63) | 69 (21.10) | 43 (13.56) |
| Type 2 | 9 (2.75) | 9 (2.75) | 6 (1.83) |
| Mild | 6 (1.83) | 9 (2.75) | 2 (0.61) |
| Unknown | 1 (0.31) | 2 (0.61) | 0 |
| Partial retinal detachment | 1 (0.31) | 3 (0.92) | 1 (0.31) |
| Total retinal detachment | 0 | 0 | 0 |
AP-ROP, aggressive posterior retinopathy of prematurity.