I'm still comparatively a young buck at 22, but I have been afflicted by a few things that don't show up for most people until much later in life. The one I would like to focus on is vision because it's the most annoying to me. I don't get checkups too often so as best as I can recall, I had 20/15 eyesight in both eyes up through my mid teens. However, when I was 19 (second year in college) I would drive a few hours home from the uni every other weekend and during those trips I had a LOT of free time. On one of these trips I noticed that I had subconsciously closed my right eye most of the trip (I've since noticed I do it a LOT and friends have commented on it). I opened it up and of course the vision was blurry but I was quite shocked when it didn't go away. Since then it's been going downhill to the point where if I close my left dominant eye I can barely read the title slide of a powerpoint presentation from the middle of an auditorium with a huge screen in the front, but my left eye remains at 20/15 vision. Anyway, I thought it was curious that one of my eyes was going so bad so quickly and some time later I noticed two things: First, pulling back gently the skin just to the right outside of my right eye causes my eye to refocus and I can see almost perfectly, and second, I sleep exclusively on my right side with my eye buried into the pillow. Now I have no idea how the eye works so this is just my crazy theory, but is it possible that over time I have reshaped the lens in my eye by sleeping on it with so much pressure for years on end?