Single vision spectacle lens
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United States of America Patent
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Jun 22, 2004
Grant Date -
Sep 18, 2003
app pub date -
Nov 7, 2002
filing date -
Dec 16, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Described is a single vision spectacle lens for spherical or astigmatic prescriptions. It is characteristic of the present invention that at least one surface is an atoroidal surface, and that along at least one line the refraction defect and the astigmatic defect for viewing angles of up to 40.degree. are each smaller than .+-.0.15 dpt. In the case of an astigmatic prescription the deviation of the cylinder axis or axis orientation from the prescribed cylinder axis or axis orientation is smaller than 1.degree..
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