hi, I state that I've never used psychedelics, I'm here because I have a friend who says he has hppd after a bad trip, what are your symptoms? I also have After-images, objects that leave trails, visual snow (especially in poorly lit areas) if I look for more than 10 seconds one thing I see it moving and breathing (even the text I'm writing now, if I pay attention I can see it move) if I look at square surfaces I can see static lights that create geometric shapes (even as a child I could lol) if I notice I have a ton of floaters, with all this I want to say that these "bugs" we have them all, only that we ignore them because they are not important for our conscience. the friend who claims to have hppd to me seems more that has a kind of ptsd that is activated when you notice these visual "bugs", then I noticed that even if I focus so much on the visual snow for example I will start to notice it more until you can not ignore it until something does not distract my attention, if we obsess about a little thing the brain will end up growing it until it becomes a problem, I could even be wrong but this friend has solved quite a bit 'of visual problems simply ignoring them, when he saw them he looked away and did not think about it, in this way the brain has activated again that filter that serves to remove the visual noise, the important thing is to make the brain understand that that information is not important to you. sorry if I wrote badly but I used google translator, thanks for reading