an improved lens with rugate filter specifically designed to be worn in prescription and non - prescription glasses , contact lenses , intraocular lenses and sunglasses , and to provide protection against macular degeneration by reducing harmful visible blue light transmission and ocular photochemical damage . the lens at least includes a single lens layer with a rugate filter deposited thereon to selectively block visible blue light . other layers may be added including a polarizing layer , dielectric layer and / or color tint in a lens sandwich configuration , to additionally give a high degree of uva and uvb protection , color contrast , and glare reduction . the rugate filter is a stop band which yields an exceptional light transmission profile under all light conditions , thereby maximizing protection as well as clarity of vision . in the multi - layer embodiment , all of the lens layers provide comprehensive protection for preventing macular degeneration , cataracts and other ocular injuries , yet maintain a balanced light transmission profile for visual acuity .