Wettable, rigid gas permeable, substantially non-swellable...

Details Wettable, rigid gas permeable, substantially non-swellable... Wettable, rigid gas permeable, substantially non-swellable...

C - Chemistry, Metallurgy

08

G

400/2005

C08G 77/46 (2006.01) C08G 18/81 (2006.01) G02B 1/04 (2006.01)

Patent

CA 1339223

1 3 3 9 2 2 3 This invention relates to ophthalmic devices, such as contact lenses and intraocular implants, and particularly contact lenses of a block copolymer containing polysiloxane and polyoxyalkylene oxide units possessing an advantageous blend of desirable properties including a) high oxygen permeability, b) good wettability, c) optical clarity and d) a substantially lack of aqueous swellability in the ocular environment of use. Even the preparation thereof and methods of treating vision defects therewith are disclosed as well as the polymers suitable for these ophthalmic devices.

591976

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