Unless things have drastically changed in the 2 years since I got my glasses, it's just going to be a special UV coating. I used to get a lot of headaches from

Unless things have drastically changed in the 2 years since I got my glasses, it's just going to be a special UV coating. I used to get a lot of headaches from eye strain (I assumed). Since I started wearing these glasses while programming, they have happened much more infrequently.