Wafer deforming composite ophthalmic lens method
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United States of America Patent
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Dec 22, 1998
Grant Date -
N/A
app pub date -
Mar 7, 1997
filing date -
Mar 7, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Methods for quickly and inexpensively producing photochromic non-prescription (e.g., sunglasses, safety glasses, reading glasses, etc.), prescription, multifocal and progressive plastic optical quality eyeglass. The lenses are formed by a process wherein a thin wafer lens is deformed to assume the curvature of a base lens. Deformation may be by heat treatment and application of pressure while adhering the wafer lens against a base lens. The invention further concerns lenses produced by the methods. The lenses are characterized by an extremely rapid photochromic response.
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