Diagnoses referring to visual impairment in 260 VLBW boys and expected numbers calculated from total population
| ICD diagnosis | Definition | Observed | Expected |
|---|---|---|---|
| 3660 | Cataract | 1 | 0.02 |
| 3670 | Hyperopia | 9 | 4.8 |
| 3671 | Myopia | 15 | 5.2 |
| 3672 | Astigmatism | 6 | 4.5 |
| 3678 | Other refraction error | 1 | 0.6 |
| 369 | Severely reduced  vision | 18 | 6.1 |
| 378 | Strabismus | 6 | 0.6 |