Pinhole lens and contact lens

US5980040A · kind A · utility

Assignee

• Wesley Jessen Corporation · US

Inventors

• David Xu · Shanghai, CN
• David Miller · Menlo Park, US
• Leroy Meshel · Mill Valley, US

Key dates

• Filing date: Jun 30, 1997
• Grant date: Nov 9, 1999
• Expiry date: Jun 30, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C7/04
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A contact lens comprising an optically transparent lens body having a concave surface adapted to the patient's eye curvature and a convex surface. The lens has three regions: (1) an annular region of a first optical power; (2) at the center of said annular region, which is also at the optical center of said lens, a substantially pinhole-like aperture; and (3) a second larger annular region exterior to the first annular region.