Contact lens

G - Physics – 02 – C

Patent

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Details

G02C 7/04 (2006.01) A61F 2/14 (2006.01) B29D 11/00 (2006.01) C08F 30/08 (2006.01) C08F 220/56 (2006.01) C08F 230/08 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2392298

This invention is directed to ophthalmic materials and ophthalmic lenses that are a co-polymerization product of a (a) hydrophilic monomer with (b) a tris(siloxy)silyl group-containing monomer, (c) a wide variety of hydrophobic monomers (both aliphatic and aromatic) and usually a (d) polyfluorinated monomer, as well as optional monomers or monomer mixtures that can include a cationic monomer, a non-aromatic hydrophobic monomer and a poly(dimethylsiloxy)silyl group-containing monomer. A contact lens prepared from such a co-polymer exhibits enhanced water content, while maintaining exceptional oxygen permeability, thereby providing a lens that can be worn comfortably for prolonged periods of time. A process for the preparation of such lenses is also disclosed.

L'invention concerne des matériaux ophtalmiques et des lentilles ophtalmiques consistant en un produit de copolymérisation (a) d'un monomère hydrophile avec (b) un monomère contenant un groupe tris(siloxy)silyle, (c) une variété importante de monomères hydrophobes (à la fois aliphatique et aromatique) et normalement (d) un monomère polyfluoré, ainsi que des monomères éventuels ou des mélanges de monomères pouvant contenir un monomère cationique, un monomère hydrophobe non aromatique et un monomère contenant un groupe poly(diméthysiloxy)silyle. La lentille de contact préparée au moyen de ce copolymère présente une teneur en eau améliorée, tout en conservant une perméabilité exceptionnelle à l'oxygène, ce qui permet d'obtenir une lentille pouvant être portée confortablement pendant des durées prolongées. Elle concerne également un procédé de préparation de ces lentilles.

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