EXTENDED WEAR OPHTHALMIC LENS

摘要

PROBLEM TO BE SOLVED: To provide a material of a contact lens that is sufficient to maintain corneal health and wearer comfort during long term wear.

SOLUTION: An ophthalmic lens has ophthalmically compatible inner and outer surfaces, the lens being suited to extended periods of wear in continuous, intimate contact with ocular tissue and ocular fluids. The lens comprises a polymeric material which has a high oxygen permeability and a high ion permeability. The polymeric material being formed from polymerizable materials comprises: at least one oxyperm polymerizable material and at least one ionoperm polymerizable material.The lens allows oxygen permeation in an amount sufficient to maintain corneal health and wearer comfort during a period of extended, continuous contact with ocular tissue and ocular fluids. The lens allows ion or water permeation in an amount sufficient to enable the lens to move on the eye such that corneal health is not substantially harmed and wearer comfort is acceptable during a period of extended, continuous contact with ocular tissue and ocular fluids.

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