Crizal Prevencia lens coatings provide three way protection of the eyes. It protects the eyes from UV and blue-violet light as well as reducing eye strain and improving comfort on the computer. UV light is a know cause of cataracts while blue-violet light is thought to contribute to the development of macula degeneration. While we all know that we need protection from sunlight, blue light is also emitted from LEDs, computers, smart phones and other electronic devices.
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