This used to happen to me a lot before I started using an e-reader. I found that if I put the font on the ‘open dyslexia’ font and bump up the print size significantly, this rarely happens anymore. It’s strange since my eyesight is 20/20 so I don’t have a problem seeing the words, I think it might be that seeing all of the other text on the page ads eyestrain and distraction.

Try it out! It might help.