A single dose of the psychedelic substance psilocybin can provide rapid relief from depressive symptoms—within just a few days. This is shown by the first randomized, double-blind study in Sweden of psilocybin for depression. The effect persisted for over three months, according to researchers at Karolinska Institutet.
They just don’t give them a visual inducing dose usually. Usually they are medicinal doses only
I’ve taken a lot of shrooms and doses between 3-4g and have never really seen visuals.