Anti blue light glasses technology

1. Substrate absorption: Anti blue light factors are added to the lens substrate to absorb harmful blue light in daily life, achieving the protective purpose of blocking blue light and protecting the eyes.
2. Film reflection: The surface of the lens is coated with a film to reflect harmful blue light, achieving the protective purpose of blocking blue light.
3. Substrate absorption+membrane reflection: This technology combines the advantages of the first two technologies, working together to achieve dual protection. 
According to the principle of complementary colors, blue and yellow are complementary colors. Whether absorbed through the lens substrate or reflected by the film layer, they block some of the blue light, so the background color of anti blue glasses will be yellow.  The higher the blocking rate of anti blue light glasses, the darker the background color of the lenses, which is the basic physical principle of anti blue light glasses.