Bicomposite intraocular lenses
AssigneeAlcon Laboratories, Inc.
InventorsGraham D. Barrett, Barry Stevens
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Abstract
Bicomposite intraocular lenses and methods for their manufacture are disclosed. Bicomposite, hydrogel intraocular lenses with one or more haptic portions having a lower water content than the corresponding optic portions, and methods for their manufacture are disclosed. The bicomposite lenses are manufactured by (i) preparing a bicomposite button of hydrogel material containing one or more polymers or copolymers; (ii) lathing the button to produce a dehydrated intraocular lens with an optic and at least one haptic; and (iii) hydrating the lens.
Claims33
A self-supporting bicomposite intraocular lens suitable for implantation in the human eye to replace the natural crystallin lens, comprising:
- an optic portion comprising a hydrogel capable of being folded and a UV absorber;
- and
- a haptic portion comprising a hydrogel, which in its hydrated state has lower water content than the hydrated optic portion.
A bicomposite intraocular lens comprising:
- an optic comprising a copolymer of HEMA and ethoxyethylmethacrylate and an ultraviolet absorber;
- and
- a haptic portion comprising a copolymer of HEMA and MMA.
A method for manufacturing an ultraviolet-absorbing, bicomposite, hydrogel intraocular lens having a higher water content in the optic portion than in the haptic portion, which comprises:
- a. manufacturing a bicomposite button comprising one or more ultraviolet absorbing polymers or copolymers;
- b. lathing the button to produce a dehydrated intraocular lens with an optic and at least one haptic;
- and
- c. hydrating the dehydrated intraocular lens.
A bicomposite intraocular lens comprising:
- an optic portion comprising a copolymer of HEMA and ethoxyethylmethacrylate in a ratio of about 3:1 and o-methallyl tinuvin P in a concentration from about 1.5% to about 2.0%;
- and
- a haptic portion comprising a copolymer of HEMA and MMA wherein the percentage of HEMA is between about 25 and 50%.
Dependencies are inferred from the claim text.