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Is your smartphone the last thing you look at before your bed time? Beyond that, if you look at a phone, computer, or TV screen during the day and 30-percent of adults spend more than 9 Hours a day doing so the exposure to blue light can lead to eye strain, headaches, blurred vision, and dry eyes. Long-term use of digital products hurt eyes very much,the hurt from glare,UV and blue ray is chronic and irreversible . How to choose a truly effective anti blue light glasses ? 1. The lens must be real optical lens . A common lens, like made of plastics, ordinary glass, etc... can not reach the requirement of optical lenses, will do harm to your eyes. 2. The lens color should be yellow-tinted or amber tinted . Colorless the lens are, the lower anti blue light effect is to get. If it is deep color, chromatism is bigger, the eyes are more inconvenience. 3. Light-weight and portable, wear with comfortable . Less tendency of material deformation. ABOUT US: We have been making eyeglasses Since 1969 and have 48 Years history . We have experience in OEM production for 40 Years, provide OEM processing services for some World brands. All the eye glasses we made have undergone stringent tests, the material of lenses are used in optics glasses , aerospace and other fields. The product has high quality and the design for the eyeglasses is according to the somatology, Ergonomic streamlining with comfortable. Ultra light weight. A pair of glasses only 0.6 Ounce . Minimum amounts of color distortion while still providing maximum protection for your eyes. ------We are sure you will satisfied with the anti blue light glasses !