Multifocal artificial ocular lens with a transparency varying with illumination
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United States of America Patent
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Jan 25, 2000
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N/A
app pub date -
Dec 30, 1996
filing date -
Dec 29, 1995
priority date (Note) -
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Abstract
A multifocal artificial ocular lens has at least two corrective areas, namely a near vision area to correct near vision and a distance vision area to correct distance vision. The transparency of the lens varies in inverse proportion to its illumination. A photochromic substance is incorporated into the material of the lens, which improves optical performance. Applications include central near vision contact lenses.
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