Silicone hydrogel contact lenses

US9121998B2 · kind B2 · utility

Assignee

• COOPERVISION INTERNATIONAL LIMITED · GB

Inventors

• Charlie Chen · San Ramon, US
• Yuwen Liu · Dublin, US
• Yuan Xu · Fremont, US
• Ying Zheng · Suwanee, US
• Junhao Ge · Johns Creek, US
• Li Yao · Corning, US
• Arthur Back · Danville, US

Key dates

• Filing date: Feb 23, 2012
• Grant date: Sep 1, 2015
• Expiry date: Sep 21, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B1/043
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Silicone hydrogel contact lenses are described. The lenses are derived from a polymerizable composition including 30-60 unit parts by weight of a hydrophilic monomer(s) having one N-vinyl group, 10 to 50 unit parts by weight of 2-hydroxyethyl methacrylate (HEMA), and a first siloxane monomer component comprising a siloxane monomer of formula (1) as described herein or a siloxane monomer of formula (2) as described herein or a siloxane monomer of formula (3) as described herein or any combination thereof, where the total amount of siloxane monomer(s) present in the polymerizable composition is from 15 to 40 unit parts by weight. Batches of silicone hydrogel contact lenses and methods of making silicone hydrogel contact lenses are also described.