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What Is Blue Light And How Does FUNGLASSES Blue Light Glasses Work?The color in the visible light spectrum ranges from blue to red. Blue light sits on the very edge of the spectrum, close to invisible UV light. Blue light is considered "high-energy visible light" (HEV), hits our eyes at a higher frequency that we're exposed to on a daily basis.As we spend more time staring at monitors, iPads, and smartphones, we increase the amount of blue light we're exposed to — and that's where blue light filtering glasses might help.How FUNGLASSES blue light glasses work?The glasses have filtering materials or surface coatings on the lenses that block a portion of blue light, made of Polycarbonate, a very popular, impact-resistant lens. It made from high-tech plastics, makes screen time more comfortable and helps significantly reduce symptoms of digital eye strain.