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:
Mar. 17, 1981
Filed:
Feb. 22, 1979
Samuel W Cohen, Brooklyn, NY (US);
Settimio Infantino, Brooklyn, NY (US);
Velotron Machine Corp., Brooklyn, NY (US);
Abstract
A cornea-examining instrument includes a plate-shaped examining element of a transparent material, which has at least one light-reflective formation on one end face thereof. The examining element has a bore which extends generally parallel to said one face. A light source, particularly a penlight, has a mounting portion which is accommodated in the bore and through which a beam of light is emitted into the transparent examining element to illuminate the formation so that light reflected therefrom forms an image of the formation on the cornea being examined when a main axis of the examining element intersects the cornea, the shape of the image being indicative of the shape of the cornea. The formation can consist of a continuous groove or a plurality of spaced depressions. When a plurality of the formations is provided, they may be shaped as parallel straight lines symmetrically arranged with respect to the main axis, or as concentric rings. In the latter event, the depressions are preferably radially aligned with one another as between the formations so that the axes of corneal asphericity can be determined. The periphery of the examining element may be provided with an inwardly facing light-reflective layer to reflect light rays back into the examining element, and a bore centered on said main axis provided for examining the cornea therethrough. A magnifying lens may be pivotally mounted on the examining element adjacent the end face carrying the formation.