+18 How Much Blue Light Should My Glasses Block 2023. Diagram of the blue light hazard spectrum and melatonin suppression spectrum. Lenses that block more than 40 percent of blue light begin to have a yellow tint.

The american optometric association recommends that blue light blocking glasses should block at least 95% of blue light in the 400 to 440 nanometer range. Purchase glasses that clearly label how much blue light is blocked to ensure you can use an item that will be effective in protecting the cornea and retina from damage. Usually, not all blue light is blocked, and the amount of blue light reduced varies depending on the type and manufacturer of the lens.web


