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:
Aug. 15, 1989
Filed:
Feb. 17, 1987
Kent P Pflibsen, Franklin, MA (US);
Michael T Milbocker, Boston, MA (US);
Eye Research Institute of Retina Foundation, Boston, MA (US);
Abstract
An eye movement tracker for stabilizing in two dimensions a diagnostic, treatment or other ophthalmic illumination on the fundus has a laser source which produces a narrow directed tracking beam, an optical steering assembly for controllably directing the beam to illuminate a region of the fundus, and an optical imaging assembly for imaging the illuminated region on a spatially-distributed photodetecting element. A tracking circuit scans the detecting element to detect motion of a spatially variant intensity feature and controls the optical steering assembly to redirect the optical path and maintain the feature in a fixed position. This repositions the diagnostic or other illumination, maintaining it in a fixed position on the fundus during eye movement. Scanning rates many times those of conventional systems are achieved, effectively stabilizing even very rapid eye movements. A viewing port provides an operator with a 30 degree field of the subject's eye fundus.