Great purchase! When I started university a couple years I never stepped away from blue ray lighting. Wether it be my monitor, a projector, computer at internship, or fluorescent lighting. It was everywhere. I started to get a sharp pain behind both of my eyes which weren’t quite the headache you feel behind your eyes, but a sharper pain. I went to my eye doctor eventually and it turns out I have 20/15 vision and blue light (all lighting) takes a bigger strain on my eyes since they can focus so well from such a length away. I used a $50 pair of blue light glasses that I ended up losing after a semester and could not repurchase (I was a university student. Aka- no money). I thought these may not work since they were so budget friendly but I though “Why not?”. When I wear these I never get strain ache and and have seriously loved it. I recommend these glasses. I also recommend buying a case for them and a lenses cleanser!