Reusable lens molds and methods of use thereof
AssigneeNovartis AG
InventorAlice Weimin Liu
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Abstract
Described herein are devices for producing ophthalmic lenses including at least one mold half defining an optical surface where the mold half is made from a polymer that includes an aromatic polyimide, a polyphenylene, or a combination thereof. The devices exhibit numerous advantages including, but not limited to, good chemical resistance, durability, machineability, and UV absorbing properties. Also described are methods for producing ophthalmic lenses using the devices described herein. The ophthalmic lenses produced with the devices described herein exhibit excellent optical properties when compared to lenses produced from conventions molds.
Claims29
A device for producing an ophthalmic lens comprising a mold half defining an optical surface, wherein the mold half is made from a polymer comprising an aromatic polyimide, a polyphenylene, or a combination thereof.
A method for producing an ophthalmic lens comprising the steps of:
- (a) introducing a lens forming material into a female mold half configured to form a cavity for receiving a lens forming material;
- (b) applying a male mold to the female mold comprising the lens forming material, wherein the male mold and female mold are configured to receive each other and form a mold cavity, wherein at least one mold half is made from a polymer comprising an aromatic polyimide, a polyphenylene, or a combination thereof;
- and
- (c) exposing the lens forming material to energy in order to crosslink the lens forming material and produce the lens.
Dependencies are inferred from the claim text.