My eyes are really screwed up, but somehow I get away without wearing glasses. I spend a lot of time looking through one eye at a time, and if I'm looking through the right eye it can make the left one go all lazy. I don't even realise I'm doing it most of the time, which is weird because it seems like the sort of thing you ought to notice.

Also I'm colourblind, but it's a very specific kind of colourblindness that only affects me when I'm trying to make a distinction betweeen very specific shades of red or green. The only time it ever seems to affect me is when I'm doing the colourblindness test. Not that I'd notice it any other time, of course...

Yet with all that said, my actual vision is pretty good. Not perfect, but good enough to read the letter chart at the optician's. And I don't have to wear glasses, which is good enough for me.