Multifocal multizone diffractive ophthalmic lenses
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United States of America Patent
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Mar 17, 1992
Grant Date -
N/A
app pub date -
May 14, 1990
filing date -
May 14, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Multifocal lenses for improving vision are disclosed. The lenses of the present invention use at least one diffractive zone located in a defined portion of the surface of a refractive lens to achieve highly efficient multifocal vision by providing nearly 100% efficiency in the +1 diffractive order. The lenses disclosed may be used for both contact lenses and intraocular lens as well as other vision correcting applications.
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