title: Dyschromatopsia in heroin addicts.
abstract: The Farnsworth-Munsell 100-hue test was employed to determine whether there was any defect of colour vision in 29 confirmed male heroin addicts who had been successfully detoxified. Forty age-matched males served as controls. A typical normal error score on the FM test is about 40 and an error score of over 100 indicates poor colour discrimination; 86.2% of the eyes of the control group had an error score below 100 while only 17.2% of the eyes of heroin addicts had an error score below 100. The colour confusion among the heroin addicts was in the blue-purple (475-495 mu) range. These results indicate that colour vision defects are more common in heroin addicts.
authors.affiliation: Faculty of Medicine, University of Colombo, Sri Lanka.
authors.forename: P L
authors.initials: PL
authors.lastname: Dias
mesh_terms: D000328:Adult; D003119:Color Perception Tests; D003117:Color Vision Defects / Q000139:chemically induced*; D005500:Follow-Up Studies; D006556:Heroin Dependence / Q000150:complications* / Q000534:rehabilitation; D006801:Humans; D008297:Male; D012307:Risk Factors