Prevalence of Color blindness in the primary school students in Sari Township 1999

Background and Çolor blindness is a kind of vision disorder, with the estimated prevalence of 0-8%, particularly 2.3-4% in females. This disease has sex linkage and transmited by X Çhromosome, Çonsequently is more observed in females. Due to much difference in the prevalence and the lack of it’s study in the region, this study was conducted in order to determine the prevalence of congenital color blindness in the primary students in sari township. This research was descriptive study done on 160 boys and girls of primary school ages. Ït was done by ashimihara test method. Sampling was done by cluster method, by random selection of 15 school boys and 11 school girls, study in the primary school of Sari township. Âmong the 3000 students under studying, 42 cases were color blind, with the number of 41(2.4%) boys and 1(0.06%) girl. Âmong the 42 color blind cases, 30 (1.706%) of them were totan, 6(36%) were Deutranopia and 6(0.36%) were protanopia. Çonclusion: Âccording of this study the rate of color blindness in the whole population was 6% in the girls and 2.4% in the boys, the most prevalent rate of congenital color blindness was of red and green, also the rate of do tan and pro tan color blindness was the same.