Thanks everyone who replied, that is very very reassuring. At least now I know I'm not going blind.
My only pronlem right now is eye floaters and these weird bright spark looking dots jumping around when I look into the sky. I'm going to start taking magnesium in a couple of days, I hope that helps. Someone tell me floaters are normal, even for a 15 year old?
Floaters are VERY normal! Although mine started at 19, my daughters started around 14 or 15 - you must be very nearsighted? Very common with that. I have floaters so bad that if I look at a bright wall it's just covered in webing! Floaters can be dots, strings, black blobs, brown smudges - they can be the size of a pin prick, they can cover half the vision in one eye... they can distort your peripheral color vision - they can do a host of things. You get used to it and don't even notice it after a while.