What Is Bule-ray? In the light source of electronic devices such as mobile phones,TV,Game machine, LEDs, fluorescent lamps, etc., visible light with a blue light band between 445 and 475 nanometers has the greatest damage to human eyes, and is called "high-energy short-wave blue light". Hazards of Blue Light! Injury the structure of macular,will cause eye strain and blurred vision, more seriously,will leading to macular degeneration lesions, decreased vision, and even blindness. After a test, Norperwis blue light blocking glasses lenses can effectively reduce Blu-ray damage.