I work as a Graphic Artist and my days are filled with long hours of looking at the computer screen. I have good vision, but had begun to have trouble focusing near to far quickly. I also began having headaches and my eyes felt as though they were straining. I ordered these based on a review from Gizmodo and I do not regret it. The difference is immediate. My eyes feel great and my screen looks clearer. If I had to make a complaint, it would be that the lenses give the screen a bit of yellow tint. I would give it 4.5 stars because of the yellow tint, but rounded up to five for default. Make sure to read the instructions, they are NOT to be used as sunglasses or while driving! It’s been a month and I’m used to the yellow tint. These glasses are great! I’m considering buying a second pair for home!