Plastic frame Resin lens Non Polarized Lens width: 3 centimeters Bifocal Reading LensesAttach the reading lenses, the glasses will become bifocal lenses, see close objects clearly through the attached lenses and through other areas look at distance . Clear VisionIf you wear the sunglasses and have trouble seeing near clear, maybe you just need a pair of glasses, choose the correct degree, it will help you see close objects clearly, like your phone screen. No Water NeededThese Stick-on Bifocal Lenses easy to use, no water is needed. When you find that the position of the sticker is not accurate, you can remove it first and stick it again. Suitable for More GlassesBifocal Reading Lenses can be attached to all kinds of glasses, such as sunglasses, goggles, blue light blocking glasses , etc. It's good for you to do experiments in laboratory or go out fishing, cycling, driving, swimming, cycling, diving, skiing. NotePlease press the lens with the glasses cloth, do not touch the lens directly with your hands, which may leave finger marks. When you find that the air bubbles cannot be removed during sticking, please remove the lens first, make sure the lens is dry, and then try to stick it again. If you have any other problems, please contact us for a timely solution.