I have owned a few pairs of glasses, but they have always given me a headache. I went to renew my drivers license, and the lady said that I missed 1 number on each try of the eye exam. I know that I'll eventually have to have glasses, but I don't know if I can wear them comfortably. I know that I can't do contacts. I have heard that a bad perscription will sometimes cause the headaches, but I don't think that was the case with me. Any tips?