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:
Nov. 16, 1993
Filed:
Jan. 12, 1993
Deborah K Hall, Menlo Park, CA (US);
Erik Rencs, Baltimore, MD (US);
Walter J Stark, Baltimore, MD (US);
Iatrotech, Inc., Del Mar, CA (US);
Abstract
A phantom cornea for calibrating surgical lasers is formed by superimposition of thin-films of alternating colors. After ablation by a laser beam, the resulting spherical cavity appears as a pattern of nested circles whose concentricity and spacing reflect the alignment and intensity of the laser beam. These patterns can be visually or instrumentally analyzed to determine the proper setting of the laser. The calibration cornea can be planar, or arcuate to mimic the natural cornea. The calibration cornea may be mounted in a phantom eyeball including a removable iris of small diameter which constitutes a convenient target for the alignment of the laser beam.