What is blue light? Blue light refers to light with a wavelength of 380-495 nanometers, which is a kind of visible light. Blue light carries high-energy visible light (HEVL) which cannot be absorbed by cornea and lens, and directly affects the retina of fundus, resulting in serious damage to eyes. Long-term exposure of eyes to blue light may have a great impact on our health-headache, insomnia, eye inflammation, fatigue, freckles and other health problems. Our products: Anti blue light Our products block harmful blue light from digital screens, which can cause eye fatigue, headache, dry eye and blurred vision, especially for children and adolescents. Anti-glare Anti-glare blue light filter can prevent eye fatigue, reduce discomfort when watching TV, and improve sleep quality. HD high transparency The screen filter can block blue light from entering your eyes, but still allow harmless light to pass through the screen, so the blue light blocking screen has no retro orange tone, just a full-color clear screen.