It seems likely that HPPD, if it doesn't go away by itself, can be cured by 50-200 hours of practicing focusing on the noise and then trying to consciously move it, changing its colors etc.
I wish tech people would stop using the term "FUD". "Fear, Uncertainty and Doubt", or "FUD", is how you don't ruin your life in one shot: https://news.ycombinator.com/user?id=shipscode
> I tried salvia after years of reading about people's experiences with it.
No, it really is about everyone else and not forfeiting their chance to experience something new by dissuading them with misinformation or some cautionary tale about an isolated fate that possibly was not at all about salvia.
I didn't bumble into salvia with no information on hand. I went there after reading about it, its effects, potential risks, chemistry, first-hand experiences etc. for years. A lifetime of side effects is not something associated with salvia.
There's at least anecdotal evidence of that
https://www.reddit.com/r/CureAphantasia/comments/1cc01zl/why...