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:
Sep. 08, 1998
Filed:
Oct. 24, 1996
Alan R Kirschbaum, Oakland, CA (US);
Christopher L Petersen, Danville, CA (US);
Carl Zeiss, Inc., Thornwood, NY (US);
Abstract
An embodiment of the present invention is a refractively corrected, wavelength selective, transparent visual field test occluder for a non-tested eye used in a visual field testing apparatus which uses a stimulus that produces light in a first color spectral range and a background illumination that produces light in a second color spectral range, the visual field test occluder comprising: (a) a base; (b) a fastener configured to fasten the base over a subject's eye; (c) a mounting affixed to the base configured to hold a filter and a refractive lens; and (d) a filter held in the mounting; wherein the filter substantially prevents transmission of light in the first color spectral range and substantially transmits light in the second color spectral range.