I bought a pair about 1.5 years ago because of headaches/eye strain when using devices with a screen. I've started to work at home, staring at my monitor (8hrs) in addition to my personal use after work. When I don't use them, I get headaches quickly so I've been using them more often. When I use them, I don't get headaches/eye strain, or I get them mildly after the workday. They are pretty good quality, I recently broke mine but after a year of accidentally dropping them repeatedly (and slightly sitting on them) lol. I really like them and they've helped to reduce the headaches/eye strain I experience :)