Let me start off by saying that my symptoms are not life-threatening, only mildly unsettling to me. I have not seen a doctor yet concerning them, but I was hoping someone may be able to help narrow down some possible causes.
I'm 18, healthy, and asides from childhood asthma and allergies, my medical record is entirely clean. I haven't actually experienced a "real" disease or disorder, so I am probably overreacting to a very common problem.
Anyways, whenever I engage in physical activity that raises my blood pressure, I have moderate depth perception distortions. Everything appears to be stretching out farther and farther away from me, and it will continue to "stretch" farther back and upwards for as long as I keep my eyes in one place. When I was 10-12, I began noticing these effects, but within the last year I have noticed the distortions are increasing in strength.
However, during those same years between 10-12 I would become extremely light-headed whenever I stood up, to the point where I almost fainted a few times, and I took the distortions to be part of the same problem. As time went on, the lightheadedness has gone completely, but I'm left with these troubling visual abnormalities.
I have only two other visual symptoms to add; whenever doing a quick acrobatic maneuver like a cartwheel, I see dancing balls of light everywhere, and also very very occasionally I get "visual" migraines, where the ache is accompanied by large floating "C" obscuring most of my vision.
I have no idea whether these things are related or even cause for alarm, but it would put my mind at ease if other people told me what they thought.