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:
May. 19, 1992
Filed:
Dec. 11, 1989
Applicant:
Inventor:
Tom N Cornsweet, Irvine, CA (US);
Assignee:
Pulse Medical Instruments, Rockville, MD (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
351204 ; 351206 ; 351211 ; 351221 ; 351224 ;
Abstract
A perimetry system uses pupillary light response to a small bright light spot or other suitable stimulus which moves at a constant speed in generally a circular path centered on a fixation mark upon which the patient's field of view is fixed. The pattern traced by the spot may be a spiral, starting at the periphery and shrinking toward the fixation mark. A measuring system continuously monitors pupil size and if the retinal image of the moving light spot moves across a region of reduced sensitivity, this event is signaled by a change in pupil size.