I have perfect vision, but my eyes hurt and words sometimes blur when I use the computer or watch TV?

You don't have perfect vision. You have a real vision problem. You are probably far sighted or presbyopic although there are a number of other problems that could cause the symptoms you are experiencing. Get an eye exam.

I am the same way with computers, and one thing I noticed is that it's a lot worse when there is something moving on the screen. Your mind tries to focus on the words as well as any motion. Sometimes another cause is the color of the words and background. While books have cream colored pages and brown-ish lettering, computer screens have stark white backgrounds(for the most part) and solid black lettering. However, I have yet to find an option on my laptop that allows you to change letters and backgrounds.

Hope this helps!

You been watching the tv too long and using the computer too long. Take a rest.

You could try and lower the brightness on your screen.