Color vision deficiency in medical students of Karachi

This study was designed to find out the prevalence of color blindness in the medical students of Karachi. Total of 550 medical and dental students was tested for color blindness. Ishihara pseudo-isochromatic color plates were used to find out any colour vision defect in the participants. Among them 365 were females and 185 were males. Out of 550 students 11[2%] were found to have color blindness, out of which 10 [5.4%] were males and 01[0.27%] were females. The prevocational screening for color vision is highly recommended; early in educational life because for some potential medical students, the handicap is so severe that a change in their proposed course of study is often advisable