Aspherical spectacle lens
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United States of America Patent
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Feb 7, 2006
Grant Date -
Sep 9, 2004
app pub date -
Mar 2, 2004
filing date -
Mar 3, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
There is provided a spectacle lens having an outer surface and an inner surface, one of the outer and inner surfaces being configured to be a rotationally-asymmetrical aspherical surface. When a curvature at a coordinate (h,θ) of the outer surface is represented by C1(h,θ), a curvature at a coordinate (h,θ) of the inner surface is represented by C2(h,θ), and a difference between curvatures of the outer surface and the inner surface at the coordinate (h,θ) is represented by C2-1(h,θ)=C2(h,θ)-C1(h,θ), if C2-1(0,θ)>0, within the ranges of 10 mm≦h[mm]≦20 mm and 30°≦θ[°]≦150° the spectacle lens satisfying a condition (1):
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