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by ewindisch 3771 days ago
This could be HPPD[1] or related. There seems to be uncertainty as to if hallucinogens cause some of these effects directly, or if they simply help train the mind to notice what was already there. For instance, is visual snow there already, and hallucinogens simply make one more aware of it and capable of focusing on it (similar to how tinnitus is worse if one focuses on it)?

https://en.wikipedia.org/wiki/Hallucinogen_persisting_percep...

2 comments

Many people find this condition extremely debilitating:

http://hppdonline.com

There is a lot of pain, anguish and regret expressed on the forums by people suffering with this condition.

This can also be caused by (minor) eye issues. I had that effect for a while after PRK surgery.