I bought these LensCovers because I have mature onset complex partial seizures. The seizures cause extreme light sensitivity and migraines. It became so severe a problem that I wasn't able to leave the house, simply because I couldn't see. I had tried all sorts of sunglasses, but nothing worked. These LensCovers were a final effort, and they have finally done the trick. The medium size fits perfectly over my prescription glasses and are surprisingly light. They don't cause any discomfort at all, and they block light around the entirety of my vision without cutting down my peripheral vision. Since I started using them, I'm finally able to see out of both eyes at once, and I no longer have to squint. My migraines are becoming less severe, and I've even noticed a decrease in seizures - apparently UV light was one of my triggers. My wife thought it was funny at first that I wear them tfrom dawn to dusk, but she enjoys the benefits so much that she no longer minds. When I go out, which is much more frequent now, people often look at me funny for wearing shades inside, but it's worth it. As for aesthetics, the profile is such that they actually look rather good. The picture in the description is very accurate. It's hard to tell I have glasses underneath, and they aren't large and bulky, as most fitovers. If I could give them more than five stars, I would.