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Blue ray blocking : The filter lens are designed using the Japan HEV-Adsorb substrate absorption technology. It can absorb high-energy blue light. UV protection :Anti-Blu-ray Lenses utilize special U.S. substrate processing technology to protect the eyes from ultraviolet radiation and block UV400.Anti eye fatigue : Long time exposure to blue light would lead to digital eye fatigue. Use Saco Blue Light Blocking Screen Protector Panel, no more tired eyes. Reduce eye strain and sensitivity to light when facing digital screens. Great for office workers or anyone who has to look at screen all day. Minimize headache : Do you suffer headaches from long time screen time? Saco Blue Light Blocking Screen Protector Panel will supercharge your health by blocking detrimental blue light while letting in all other beneficial light. Sleep better : Exposure to high rate blue light will impact our sense of circadian rhythms and wreck our internal rock, then lost sleep. Saco Blue Light Blocking Screen Protector Panel will improve your sleep, help you sleep better and have good night