Could smoking too much and too often cause vision problems? Because I'm starting to think it's happening to me. I started smoking marijuana almost daily about a year ago, before that I had only smoked a couple times, and I still do. My health is fine, my lungs take somewhat of a toll but I exercise a lot so they're still in great shape. My short-term memory is pretty shitty, especially after long, huge sessions, but I recover that within a few day's break. I've always had perfect vision, but since last year my vision has started getting worse. At first it was just sorta hard to see what was on the board from the furthest seat (in a huge lecture hall) during class, that was around April or May of last year. Now I always have to sit at the front or else I can't see shit, the writing is a complete blur from the back. I have a hard time distinguishing faces as people are walking towards me. After a huge night of smoking my vision gets blurred pretty badly. The next day my vision is sorta bad, and then after a few days it gets better. That's how it was last year, and my vision would come back to normal after a day or 2. This year, if I have a huge night of blazing, my vision will get jacked, and the next day it'll still be almost as bad as the previous night, and it will slowly get back to the shitty state that my vision as at now. I've cut back for about a week now (last time was a week ago from today) and my vision hasn't really improved, maybe a tiny bit. COULD it be that smoking fucked up my vision? Of course you could just say that it's about that time when my vision is starting to get fucked, and it just happened to coincide with smoking. Has anyone else ever heard of this or had any similar problems? I've developed a few high theories as to how this could've happenened, THC levels within the brain, circulation effects of smoking, etc, but I don't have enough knowledge to make a good hypothesis. I'm 19, my dad never wore glasses, my mom had slight vision problems but she got over them, my sister is 14 and wears glasses, her vision is probably as bad as mine. Anyone got any ideas?