PLASTIC SPECTACLE LENS AND SPECTACLES
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United States of America
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Aug 16, 2019
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Aug 16, 2019
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Abstract
A plastic spectacle lens includes at least a plastic base. In the plastic spectacle lens, a difference between a highest transmittance and a lowest transmittance for light in a range of wavelengths of not less than 400 nm and not greater than 780 nm, is not greater than 10 points, and an internal transmittance of the base for light in a range (visible range) of wavelengths of not less than 380 nm and not greater than 780 nm is not less than 80% over the entirety of the range of the wavelengths.
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