Progressive power multifocal lens
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 2, 2002
Grant Date -
Jan 3, 2002
app pub date -
May 9, 2001
filing date -
May 10, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A series of progressive power multifocal lenses having a plurality of base curves which are designed to have substantially the same basic lens specifications and substantially the same optical characteristics in the worn state with respect to all of the base curves, so as to have an excellent optical performance in the worn state. The progressive power multifocal lens secures a wide clear vision range with a smaller amount of astigmatism in the far portion and a smaller amount of blur of the image due to a dioptric power error.
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Family
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Cited Art Landscape
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