Color: Black, Shape: Rectangular WHY BLUE LIGHT BLOCKING GLASSES? Many of today's electronic devices use LED back-light technology to help enhance screen brightness and clarity. These LEDs emit very strong blue light waves. Smart phones, computers, tablets and flat screen televisions are just among a few of the devices that use this technology. It's well known that exposure to Blue light in the evening and long hours of screen time ruins your sleep and causes sore eyes and headaches. Blue light blocking glasses are a safe and comfortable sleep aid that prevents insomnia and other sleep disorders. Blue light from digital screens reaches deeper into the eye and its cumulative effect can cause damage to the retina and can cause the development of age-related macular degeneration and cataracts. WHAT'S THE DIFFERENTCES between BIOGLASS BLUE LIGHT BLOCKING GLASSES and OTHERS? -99% Anti-blue light(380nm~430nm) -100% Anti-UV and Anti-Radiation -Photochromic(color changing) lens - Automatically color changing (Yellow to Gray) -Hight technology Frame Material: ULTEM - safe, flexible, super light and durable frame.
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