1. Substrate Absorption: Blue light blocking agents are added to the lens substrate to absorb harmful blue light in daily life, achieving the purpose of blue light blocking protection and thus protecting the eyes.
2. Coating Reflection: A coating on the lens surface reflects harmful blue light, achieving the purpose of blue light blocking protection.
3. Substrate Absorption + Coating Reflection: This technology combines the advantages of the previous two technologies, providing dual-effect protection.
Based on the principle of complementary colors, blue and yellow are complementary colors. Whether the blue light is absorbed by the lens substrate or reflected by the coating, a portion of the blue light is blocked. Therefore, the base color of blue light blocking glasses is yellow. The higher the blue light blocking rate of blue light blocking glasses, the darker the base color of the lens will be. This is the basic physical principle of blue light blocking glasses.
