Multifocal ophthalmic lens
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United States of America Patent
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Feb 13, 2001
Grant Date -
N/A
app pub date -
Nov 5, 1998
filing date -
Jun 1, 1987
priority date (Note) -
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status (Latency Note)
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Abstract
An improved ophthalmic lens is disclosed which has a plurality of alternating power zones with a continuously varying power within each zone, as well as in transition from one zone to another. In other words, a plurality of concentric zones (at least two) are provided in which the variation from far to near vision correction is continuous, i.e., from near correction focal power to far correction focal power, then back to near, and again back to far, or vice versa. This change is continuous (progressive), without any abrupt correction changes, or 'edges'.
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