Frequency of causes of blindness in schools for the blind in Tehran in 2002–3
| Diseases | No of cases | % | |
|---|---|---|---|
| Leber’s congenital amaurosis (LCA) | 160 | 44.2 | |
| Congenital cataract | 49 | 13.5 | |
| Congenital glaucoma | 27 | 7.5 | |
| Secondary optic atrophy | 21 | 5.8 | |
| Primary optic atrophy | 16 | 4.4 | |
| Peter’s anomaly | 12 | 3.3 | |
| Anophthalmia | 11 | 3.0 | |
| Anterior segment dysgenesis | 8 | 2.2 | |
| Microcornea | 6 | 1.7 | |
| Uveal coloboma | 6 | 1.7 | |
| Rod monochromatism | 5 | 1.4 | |
| Congenital toxoplasmosis | 5 | 1.4 | |
| Bardet-Biedel syndrome | 5 | 1.4 | |
| Sclerocornea | 5 | 1.4 | |
| Albinism | 4 | 1.1 | |
| Microphthalmia | 4 | 1.1 | |
| Trauma | 3 | 0.8 | |
| Others | 15 | 4.1 | |
| Total | 362 | 100 |