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Blue cut lenses feature a special coating that reflects harmful blue light and restricts it from passing through the lenses of your eyeglasses. Blue light is emitted from computer and mobile screens and long term exposure to this type of light increases the chances of retinal damage. Blue cut glasses, also known as blue light glasses, are used for the purpose of limiting blue light exposure from digital screens. They are important to use for people who spend long hours working with screens and are at a higher risk of developing premature eye damage and loss of visual acuity.