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. 01, 1986
Filed:
Apr. 01, 1983
Applicant:
Inventors:
Steven E Feldon, San Marino, CA (US);
Barry G Broome, Glendora, CA (US);
David A Wallace, Hermosa Beach, CA (US);
Assignee:
Keratometer Research and Development, Hermosa Beach, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
351212 ; 351205 ; 351221 ;
Abstract
An improved keratometer instrument capable of measuring keratometric values of an eye is provided. An optical reference of a predetermined dimensional value is directed at the cornea of the eye and an optical sensor measures the same at different meridians. A computer circuit can determine whether the instrument is de-centered or de-focused relative to the eye and can derive measurements of keratometric values. The axis of astigmatism can be visually displayed to the surgeon during an operation.