Search International and National Patent Collections

1. (WO1999008147) CONTACT LENS

Pub. No.:    WO/1999/008147    International Application No.:    PCT/GB1998/002379
Publication Date: Fri Feb 19 00:59:59 CET 1999 International Filing Date: Sat Aug 08 01:59:59 CEST 1998
IPC: G02C 7/04
Applicants: VISTA OPTICS LIMITED
HOUGH, Denis, Anthony
Inventors: HOUGH, Denis, Anthony
Title: CONTACT LENS
Abstract:
The invention provides a rigid contact lens which acts as a varifocal device when worn on a specified eye in which the varifocal functionality is obtained from the goemetry of the back surface of the lens. A process for the manufacture of such a rigid contact lens is also provided together with a process for shaping the back surface of such a rigid contact lens and a rigid contact lens blank having a back surface prepared by such a process.