Analysis on 10,030 county dwellers' sense of color in Mingshui County,China

Abstract

Objective To estimate the prevalence of Color Vision Defects by a population-based survey in a rural Chinese population.Methods Cluster sampling was used to select samples.Residents' sense of color with the color vision plate drawing by Ziping Yu was examined.The associations of Color Vision Defects by age and gender were calculated through multiple logistic regression.Results Among the 11,391 people entered in the project,10,030 were examined(88.05%),and of these 5,162(51.46%)were men.The prevalence of color blindness and color weakness was 1.72%(95% confidence interval CI:1.47%～1.97%)and 1.51%(95% CI:1.28% to 1.74%),respectively.We found that gender was associated with color anomalopia.Of the 251 cases of defective color vision in males,132 cases(2.56%)involved color blindness,119 cases(2.30%)involved color weakness; Of the 73 cases of defective color vision in females,41 cases(0.842%)involved color blindness,32 cases(0.657%)involved color weakness; men had a higher abnormal rate than women.Significant difference was found in the above results according to the statistics.Conclusions The male prevalence of color deficiencies in this area has already fallen down.No significant difference is found in females. Key words: Prevalence; Color Vision Defects; Color amblyopia