Dehghan, A. Kianersi, F. Moazam, E. Ghanbari, H. 2010 This study in 2005 evaluated the causes and major anatomical site of blindness and severe visual loss at a school for blind children in Isfahan province, Islamic Republic of Iran. All 211 students were examined according to the modified WHO PBL eye examination record: 70.4 were blind, 24.3 had severe visual loss and 5.3 were visually impaired. The major causes of abnormality were hereditary factors 42.7 , prenatal neonatal 18.5 and unknown etiology 35.5 . The main sites of abnormality were the retina 62.6 , whole globe 17.5 , lens ...