Table 1

 Frequency of causes of blindness in schools for the blind in Tehran in 2002–3

DiseasesNo of cases%
Leber’s congenital amaurosis (LCA)16044.2
Congenital cataract4913.5
Congenital glaucoma277.5
Secondary optic atrophy215.8
Primary optic atrophy164.4
Peter’s anomaly123.3
Anophthalmia113.0
Anterior segment dysgenesis82.2
Microcornea61.7
Uveal coloboma61.7
Rod monochromatism51.4
Congenital toxoplasmosis51.4
Bardet-Biedel syndrome51.4
Sclerocornea51.4
Albinism41.1
Microphthalmia41.1
Trauma30.8
Others154.1
Total362100