It addresses it as such "Visual perceptual effects (assessed following resolution of acute drug effects) were reported by 22/50 (44%) psilocybin participants on

It addresses it as such "Visual perceptual effects (assessed following resolution of acute drug effects) were reported by 22/50 (44%) psilocybin participants on the day of dosing and by 3/50 (6%) after the dosing day, all resolved by study conclusion (See Table 3 for details)." [table shows it resolved by day 9] However the study also shows 2 people in the experiment group (1 in the control) had an adverse effect that required psychiatric attention. Unclear what that means (admitted to a hospital or a phonecall with the therapist?)