Multifocal ophthalmic lenses and processes for their production
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United States of America Patent
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Jan 28, 2003
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N/A
app pub date -
Jul 19, 1999
filing date -
Jul 19, 1999
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Abstract
The invention provides lenses that have zones of more than one optical power, or focal length, and a smooth transition between the zones of differing power.
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