I've had these for about 2 weeks and they're wonderful for blocking the blue light from the computer screen. I'm a copywriter and spend all day working on my computer. I had a pair of the Womack computer glasses, which worked very well. Unfortunately, the frame broke after a year of use. I went a few weeks using my regular reading glasses and my eyes constantly felt like they were full of sand and I'd get headaches and brain fog. I decided to try these because they appeared sturdier than the Womack, we'll have to see how they hold up. I was apprehensive when they came because the lens seemed to be a lighter tint, but they work every bit as well, if not better, because the screen doesn't have a dark tint like it did with the others. They sit comfortably on my face and fit well. So far, I love 'em!