I got new glasses a few weeks ago and just last Friday, I started getting these tension headaches that lasted up until now. I don't get it since I had the new glasses for a week and a half and everything was peachy keen and then, bam! My head started going crazy and I felt sick. My vision did seem to have gotten a bit worse, but I don't think the prescription is too strong. I talked to someone in the optometrist's office and he said it could be working on the computer plus stress. So he said to try wearing my old glasses when working on the computer and my new glasses for everything else. I'll try anything to prevent having to get bifocals!