SURFACE TREATED CONTACT LENS

A contact lens for correction of astigmatism is formed from a single polymeric or copolymeric material. The lens has a central optical zone of greater rigidity than a surrounding non-optical zone. The rigidity of the central optical zone is sufficient for it to retain an astigmatism-correcting shape...

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Bibliographic Details
Main Authors SHAOW B. LIN, LYLE M. BOWMAN, S. KUMAR CHANDRASEKARAN, THOMAS HARVEY, ROBERT ERICH BAUMAN
Format Patent
LanguageEnglish
Published 19.02.1987
Edition4
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
CONTACT LENSES
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
ORGANIC MACROMOLECULAR COMPOUNDS
PHYSICS
SPECTACLES
SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Summary:A contact lens for correction of astigmatism is formed from a single polymeric or copolymeric material. The lens has a central optical zone of greater rigidity than a surrounding non-optical zone. The rigidity of the central optical zone is sufficient for it to retain an astigmatism-correcting shape when worn on an eye, while the surrounding non-optical zone conforms to the shape of the eye.
Bibliography:Application Number: AU19860061108