When I first started needing glasses for distance (I think I was 8), I went to a doctor who didn't believe that you should wear your glasses except for when you "really" needed to see. He also undercorrected my prescription. I think he was ascribing to the philosophy that your eyesight got used to whatever prescription you had, and that made your eyesight get worse. In retrospect, all it did was make me go around in a blur for about 10-12 years. I only wore my glasses to see the board in school and when I was driving. Finally, in my senior year of college, I started wearing them all of the time. I couldn't believe how much I had missed by going around in a blur. My eyesight got progressively worse, anyway. Of course, vanity got to me a year or so after I graduated, and I started wearing contacts.