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. 15, 2016
Filed:
Jan. 20, 2014
Hoya Corporation, Tokyo, JP;
Volkhard Schroth, Freiburg, DE;
Wolfgang Jaschinski, Dortmund, DE;
Hans Warntjes, Dronten, NL;
Takashi Hatanaka, Higashimurayama, JP;
HOYA CORPORATION, Tokyo, JP;
Abstract
A prism prescription value acquisition system that includes a calculation part for numerically transforming a fixation disparity amount (unit: angle), which indicates a degree at which the visual axis is shifted from the central fovea of the retina when a subject conducts visual fixation of a target, into a prism prescription value by multiplying the fixation disparity amount by a coefficient when the fixation disparity amount is within ±4 minutes. Herein, the prism prescription value is calculated according to the following equation: AP=k*FD, AP=k*FDproviding that each of coefficients kand ksatisfies the following conditions: 0.3≦k≦0.7, 1.4≦k≦2.0.