As I noticed, after reading 2-8 thousand words a day, after a few days of reading like this, it becomes very difficult for me to read, and I started reading actively lately, before that I only watched TV shows and movies, and now I have a slight headache, the text is floating, I even confuse words. In fact, that’s why I used to read very little, and now I’m so tired of TV shows and movies that I’m willing to force myself to read, even if I have a headache, to become emotionally attached to books instead of just consuming like zombie like I used to.
3rd-ing the suggestion for an e-reader. On those you can change and enlarge the font, and the screen is much more comfortable to look at (even more comfortable than paper IMO). And remember you are reading for entertainment and pleasure. Stop reading when it stops feeling good! Go do something else.