Table 2

Causes of childhood blindness as reported from schools for the blind

Four most frequent causes of blindness and severe visual impairment
CountryYearLocationNoCategory 1%Category 2%Category 3%Category 4%
*Other causes of blindness not reported.
Argentina71993School for the blind573ROP35Other retina16Optic nerve10Cataract8
Bolivia81988School for the blind78Cornea23Retina23Cataract21Optic nerve10
Brazil91998School for the blindGlaucoma15Cataract14Chorioretinitis13Optic atrophy12
Chile7199210 schools for the blind267Other retina29ROP18Optic nerve13Cataract9
Colombia101991–6Three schools for the blind*94ROP11
Cuba101991–6All school for the blind 2 regions*70ROP39
Dominican Republic71992School for the blind51Cataract31Cornea18Glaucoma18Other retina10
Ecuador101991–6All school for the blind*142ROP14
Guatemala101991–6All school for the blind*73ROP4
Jamaica111986School for the blind108Cataract39Optic nerve18Glaucoma15Retina15
Paraguay101991–6All school for the blind*36ROP33
Peru121990School for the blind202Cornea18Glaucoma12Cataract12Retinal degeneration12
Uruguay71986School for the blind220Cataract25Other retina24Optic nerve12ROP9
USA131981–95Low vision clinic762Cortical visual impairment8ROP8Optic atrophy7nystagmus7
USA141996–7Alabama school for the blind123Optic atrophy13Cataract13Albinism13Congenital malformations12
USA15199820 schools for the blind2553Cortical19ROP13Optic nerve7Albinism7
USA161998School for visually impaired62ROP19Optic atrophy19Retinitis pigmentosa15Optic nerve hypoplasia13