| 摘要 |
An improved lens with Rugate filter (50) 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 (16) with a Rugate filter (50) deposited thereon to selectively block visible blue light. Other layers may be added including a polarizing filter layer (17), dielectric layer (14) and additional lens layer (18) in a lens sandwich configuration, with either/both lens layers (16, 18) color-tinted, to additionally give a high degree of UVA and UVB protection, color contrast, and glare reduction. The Rugate filter (50) forms a stop band which yields an exceptional light transmission profile under all light conditions, maximizing protection without sacrificing 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.
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