The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 18, 2000
Filed:
Nov. 05, 1997
Applicant:
Inventors:
Richard Blankenbecler, Stanford, CA (US);
Paul K Manhart, Tucson, AZ (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C / ; G02B / ;
U.S. Cl.
CPC ...
3511 / ; 359652 ; 359653 ; 359654 ;
Abstract
A radial gradient contact lens is provided. The methodology described above allows the parameters of the lens and of the radial gradient profile to be chosen to improve the vision and the comfort of the wearer. The lens can be made thinner and the optical performance remains improved as the CL moves around in the eye. The improved vision leads to higher contrast when the iris of the eye is fully open as it is under low light level conditions. The use of an anamorphic lens consisting of an elliptical index profile for use in correcting astigmatism is described.