Bifocal contact lens of the bivisual type

US4618228A · kind A · utility

Assignee

• Titmus Eurocon Kontaktlinsen GmbH & Co. KG.

Inventors

• Heinz Baron · Frechen, DE
• Peter Hoefer · San Francisco, US
• Herbert Schwind · Goldbach, DE

Key dates

• Filing date: Dec 9, 1983
• Grant date: Oct 21, 1986
• Expiry date: Dec 9, 2003

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C7/048
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A bifocal contact lens has two, differently-focusing lens parts with a transitional zone therebetween and an arrangement to orient the zone vertically in use. The focus of the lens part then closer to user's nose is preferably adapted for reading and the other for distance. Preferably, too, the transitional area runs across the optical and physical center of at least an optical portion of the lens.