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It is easy to overlook the fact that appliances which emit heat have near-infrared light, like sunlight which has more than 50% of near-infrared light. Near-infrared rays pass through the crystal and the macula to the optic nerve, which can cause optic nerve damage and early-onset cataracts. As the eyes do not feel the damage of the heat, prolonged exposure can burn the cornea or retina and blue light in digital products is more likely to cause macular degeneration of the retina. 21Ray can effectively block harmful near infrared red light and blue light from penetrating the eyes and reduce damage. 21Ray uses an aspherical lens to block UV light and filter out harmful blue light whilst retaining beneficial blue light. SGS certified with a blocking rate of more than 40% in the near infrared, more than 50% in the blue light, and more than 90% in the ultraviolet light, which reduces eye damage.
