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:
Feb. 06, 1996
Filed:
Feb. 10, 1994
Randy H Kardon, Iowa City, IA (US);
University of Iowa Research Foundation, Oakdale, IA (US);
Abstract
An automated system and method for determining pupillary threshold response is described. The system achieves the determination of pupillary threshold levels through the measurement of supra-threshold responses at varying light intensities, which measured values are processed by a non-linear regression routine to approximate threshold response. The system takes supra-threshold measurements by means of a computerized pupillometer which is linked to an automated perimeter. The measurements are sequentially taken at varied light intensities which are reiteratively selected in response to the comparison between responses that have been previously measured during the test and a pre-stored response curve of expected values. The measured values are then processed by a non-linear regression routine to indirectly generate an estimated threshold level. The system is fully automated, produces accurate and reliable results, and is not subject to the uncertainties which are attendant with the measurement of threshold levels by the taking of subjective measurements.