Blue light blocking glasses. These do not have any prescription. I wore them for long periods and didn't get tired. I'm no longer using them because my presbyopia has progressed, so I'm selling them! The frame has a stylish matte finish. Ultra-lightweight frame with a casual impression. * Glasses only Size: Unisex Purchased a few years ago, used a few times for computer work, and then stored at home. Please refrain from purchasing if you are sensitive to used items and/or home storage.