Boston Glasses Blue Light Cut Non-Prescription Glasses for Computer PC Black Stylish PC glasses, an essential item for modern people. The screens of computers, smartphones, TVs, and other electronic devices used daily emit light called blue light, which is a strong energy that reaches the retina. Prolonged use can cause flickering vision and glare, straining your eyes. PC glasses are an essential item to protect your eyes from such blue light. 95% Blue Light Cut Rate!! Use for office work with a lot of computer tasks or when using your smartphone at home. Blue Light Cut, UV Cut!!! Not only for computers and smartphones, but also for UV protection!! Not only blue light from smartphones and computers, but also the effects of UV-A and UV-B on the eyes have become a problem in recent years. Blue light from smartphones and computers can not only cause eye strain but also sleep disorders, potentially disrupting the human circadian rhythm. Size Please refer to the image. Frame Black Comes with the main unit only.