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by Nursie 2427 days ago
> Many people report constantly seeing low-key visuals after LSD

That's not the classical 'flashback' though, which is generally described as suddenly being back in the middle of it in an overwhelming way. It's more like a low-level HPPD (which is something of an oxymoron as HPPD is defined by being high-level enough to interfere in life).

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