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1.56 FSV Blue Block HMC Blue Coating Optical lenses
Blue Block Lens, we also call it Blue Cut Lens or UV420 Lens.And it has two kinds different blue block lens, one is material blue block lens, this kind is block the blue light by material;another one is adding a blue block coating to block the blue light.Most customers choose material blue block lens, because it’s cheaper and easy to check its block function, just need a blue light pen is enough.
