Invention Grant
- Patent Title: High refractive index siloxane insert materials for embedded contact lenses
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Application No.: US17205186Application Date: 2021-03-18
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Publication No.: US11618823B2Publication Date: 2023-04-04
- Inventor: Jing Cheng , Steve Yun Zhang
- Applicant: Alcon Inc.
- Applicant Address: CH Fribourg
- Assignee: Alcon Inc.
- Current Assignee: Alcon Inc.
- Current Assignee Address: CH Fribourg
- Agent Jian Zhou
- Main IPC: C08L83/06
- IPC: C08L83/06 ; C08F220/12 ; C08G77/442 ; C08G77/20 ; G02B1/04

Abstract:
The invention is generally related to an insert for being embedded in a silicone hydrogel contact lens. The insert is made of a crosslinked materials which are rigid in dry state at room temperature (from about 22° C. to about 26° C.), have a high oxygen permeability and a high refractive index in fully hydrated state. Such materials are useful for making inserts in embedded contact lenses for correcting corneal astigmatism, presbyopia, and color blindness lenses and for imparting photochromic characteristics to the lenses. The invention is also related to a method for making embedded silicone hydrogel contact lenses comprising an insert of the invention therein and to embedded silicone hydrogel contact lenses comprising an insert of the invention therein.
Public/Granted literature
- US20210292557A1 HIGH REFRACTIVE INDEX SILOXANE INSERT MATERIALS FOR EMBEDDED CONTACT LENSES Public/Granted day:2021-09-23
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