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. 25, 1998
Filed:
Jul. 18, 1996
Kazuo Ichikawa, Nagoya, JP;
Toshiyuki Nakajima, Tokyo, JP;
Canon Staar Co. Inc., Tokyo, JP;
Abstract
An ophthalmologic knife includes a handle, and a blade having a base portion fixed to the tip of the handle and an incision-forming portion integrally formed with the base portion. The entire portion of the blade or at least part of the incision-forming portion which is inserted into the cornea of an eyeball has an arcuate cross section. By using the ophthalmologic knife, a three-dimensional incision having an arcuate cross section is formed in the cornea or the like. When a three-dimensional object having a cylindrical cross section or the like is inserted into the incision, the convex portion surrounded by the incision is bent toward the inside of the eyeball. This allows smooth insertion of the object.