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Regular cannabis use may cause alterations in vision
Regular users of cannabis can demonstrate a delay in transmission of action potentials by the ganglion cells compared with non-users, which could potentially cause alterations in vision, according to a study. The case-control study included 28 individuals who regularly used cannabis and 24 matched, healthy, non-drug-using controls. The groups had no significant differences in median age or sex of the subjects. Cannabis users had fewer average years of education and a higher average of alcohol uses per week compared with the control group.