1.56 Anti-blue photochromic lens refers to a lens with a refractive index of 1.56, which has the function of anti-blue light and photochromic. This kind of lens not only has anti-blue properties, can effectively reduce the blue light emitted by electronic products on the eye irritation, but also has the color change function, can darken under light and ultraviolet irradiation, protect the eyes from strong light and ultraviolet damage.
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