Method of producing haptics for intraocular lenses having high fracture toughness

US5158719A · kind A · utility

Assignee

• Optical Radiation Corporation · US

Inventors

• Scott Chang · Los Angeles, US
• Thomas Paul · Herne, DE
• Kenneth E. Weber · Burbank, US
• Edwin A. Creasman · Fontana, US
• Mei-Ing Cheng · Walnut, US
• David R. Navarrete · Cerritos, US
• Jimmy D. McCullough · Chino, US

Key dates

• Filing date: Jan 28, 1991
• Grant date: Oct 27, 1992
• Expiry date: Jan 28, 2011

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2995/0079
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

In a method of producing an intraocular lens having a substantially clear optic and at least one filamentous haptic having high fracture toughness, solid particles are mixed into an uncured polymer, and the mixture is inserted into a mold. Ultrasonic energy is applied to the mold until the mixture solidifies. Heat is applied to complete the curing process. Ultrasonic energy is also preferably applied to the particles and uncured polymer mixture to improve dispersion of the particles therein.