Eyeglass lens and eyeglass lens manufacturing method
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United States of America Patent
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Sep 26, 2017
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app pub date -
Sep 19, 2014
filing date -
Sep 20, 2013
priority date (Note) -
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Abstract
A spectacle lens is provided belonging to a series of spectacle lenses having each of first refractive power and second refractive power in common, where a progressive region length, which is a length along a meridian within a progressive region, is shorter than a predetermined reference spectacle lens belonging to the series of spectacle lenses, and a designed maximum differential value where a normalized addition refractive power distribution in the progressive region is differentiated is caused to be close to a reference maximum differential value where a normalized addition refractive power distribution in the progressive region of the reference spectacle lens is differentiated.
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