Clear Vision: If 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. Convenient adhesive lenses: Our bifocal lenses are designed for optimal adhesion. No adhesive or water is needed, leaving no marks on precious glasses, easy to install, and providing clear vision anytime, anywhere. Bifocal Reading Lenses: Attach the reading lenses,the glasses will become bifocal lenses,see close objects clearly through the attached lenses and through other areas look at distance . No Water/Adhesive Required: Our bifocal lenses are designed for optimal adhesion.No adhesives and water is needed, won't leave any marks on your precious eyeglasses. Suitable for More Glasses: Bifocal 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.