So about two years ago I smoked weed for the first and only time, I had no previous experience using drugs. I passed a joint back and forth with a friend. After a couple minutes of that, I wasn't feeling anything, mainly because my friend had held onto the joint for the majority of the time. So a mutual friend grabbed a little pipe of sorts, and stuffed a wad of weed in it. Two or three good sucks on that thing something snapped. Next thing I know, I was standing up, and the world was spinning and shifting around me. The next morning, I woke up to find my vision blurred, and discontinuous. I felt like I was in a dream. I would look at something, but not really see it. Over the next couple months, I picked apart the different things wrong with my vision. How I could see little moving dots if I looked at the sky, or a light rain-like haze if I looked at something dark, or trials behind anything that moved, or how little blurred halos encircled lights at night. About a year in, I talked to a doctor about it. She said she had heard of such symptoms with people who had used LSD, and that it did not sound like I had anything dangerous, like a tumor, but that there was nothing that could be done to improve my state. So slowly, as time progressed, and as I became more accustomed to the abnormalities, as well as my eyes improving ever so slightly, I started to feel my sense of reality return, and I started living a "relatively" normal life. Anyway, I know plenty of you are thinking, "no way, weed can't cause HPPD" and I would love to agree with you. However, as far as I can tell, my symptoms are pretty close to HPPD, albeit possibly less severe than usual. As to if I smoked something different, it's possible, there could have been something in, or on that pipe that I was unaware of, but I couldn't tell you, since I don't know what a normal marijuana high is like. Any thoughts, ideas, or suggestions would be awesome.