These things are so thin I did not like them.I got these after trying a friend’s computer glasses when I had a headache. These are a lifesaver. I work full time in front of a computer and I got to school and a lot of my books are eBooks, so I’m almost always in front of a computer. I used to get really bad headaches because I didn’t realize I was squinting sometimes. Now that I’ve been using these when on the computer, my headaches are gone and I don’t feel as drained at the end of the day. I love them. They fit very comfortably, they’re light, and I really like that they came with a little zippered case with a cloth to clean the lenses. These were an all around great buy. Came with a hard shell case, soft pouch, lens cleaning cloth, a carabiner, and the sunglasses! Great deal for $18!