Being a young geek, I spent way too much time staring at computers and, back then, they were all bad CRT's (remember having to have a screen saver to avoid burn-in?). I had eye issues because all I was doing was college and work. Everytime I went outside I couldn't tell 100 yards from 300 yards and everything was too bright. A trip to the optometrist got me a prescription for tinted windows on my car (now THAT'S another story), but he also told me the "cure" was to start finding ways to focus longer distances. It took a while and, from then on, I made it a habit to have offices with views or at least go outside and look into the distance more. I also have some glasses that are mostly black, but with pin-holes in them that supposedly help strengthen the eyes.
All of that said, I think just knowing it was possible made the biggest difference.
(And I did find two of the programs but, since they're all paid for I can't post 'em! One is called the "Program For Better Vision" and the other is called "Vision Without Glasses." )