An Exploratory Study: The Effects Of Chronic, Long-Term Marijuana Use On Depth Perception

Twenty S's were chosen on the basis of their age, sex, and family background, visual acuity, and past history of drug use, to participate in a study concerning the chronic, long-term effects of marijuana use on depth perception. An orthorater was used to measure depth perception . . . The results showed a depth perception impairment for the male users (p<.05) with an interaction effect between drug use and sex that approached significance (p<.10).