“Hallucinogen Persisting Perception Disorder (HPPD) is a rare clinical condition in which patients who have had previous exposure to a hallucinogenic substance continue to experience perceptual distortions months to years after complete cessation of the initial substance use.”

https://eyewiki.aao.org/Hallucinogen_Persisting_Perception_D...

Under the right circumstances, hallucinogens can permanently change you in a positive way. I think there is clinical evidence of this with MDMA or mushrooms and PTSD, but I'm not sure.

It’s not that rare. I had it for ~18 months after a heavy trip at age 20. It’s dose dependent and can self-resolve. Even if it hadn’t self-resolved it didn’t substantially interfere with my life during that period.

For the others like me who didn't know: Hallucinogen persisting perception disorder

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

I used to have it bad, now only a little bit. You get used to it like anything else. I did a lot of dumb stuff to get it, just one trip won't cause it most likely.