Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1996-07-17
1998-12-15
Merriam, Andrew E. C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523107, 351160H, 526279, 528 32, G02C 704, C08F23008
Patent
active
058498117
ABSTRACT:
An ophthalmic lens suited for extended-wear for periods of at least one day on the eye without a clinically significant amount of corneal swelling and without substantial wearer discomfort. The lens has a balance of oxygen permeability and ion or water permeability, with the ion or water permeability being sufficient to provide good on-eye movement, such that a good tear exchange occurs between the lens and the eye. A preferred lens is a copolymerization product of a oxyperm macromer and an ionoperm monomer. The invention encompasses extended wear contact lenses, which include a core having oxygen transmission and ion transmission pathways extending from the inner surface to the outer surface.
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Baron Richard Carlton
Chabrecek Peter
Court John
Domschke Angelika
Griesser Hans Jorg
Ciba Vision Corporation
Lee Michael U.
Meece R. Scott
Merriam Andrew E. C.
The Commonwealth of Australia Commonwealth Scientific and Indust
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