Case report: Prolonged amelioration of mild red-green color vision deficiency following psilocybin mushroom use
Drug Science Policy and Law January 1, 2023 Brian S. Barnett, Noah Wiles Sweat, Peter S. Hendricks 6 citations
A person with red-green color blindness (mild deuteranomalia) self-administered the Ishihara color vision test before and after taking 5 grams of dried psilocybin mushrooms. Partial improvement in color vision peaked at 8 days and lasted at least 16 days after taking psilocybin, though later observations were confounded by additional substance use. The improvement extended beyond the acute drug effect, even though color blindness is typically a genetic condition. The authors call for systematic research to confirm these findings and understand the mechanism.