I wear glasses/contact lenses already, so I get my eyes checked regularly. I've had pretty bad eyesight since I was nine years old, and an astigmatism in my left eye since I was at least nineteen. Theoretically at least, my contact lenses correct for it.

I honestly don't think it's a vision issue though; I don't have issues identifying the letters, and I don't have trouble reading the words or parsing sentences, I seem to have a lot of trouble keeping track of which line I'm on when I'm reading stuff with relatively small font. When I have large font, I don't have this issue, and I can read relatively quickly without a ton of issues.