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:
Apr. 22, 2008
Filed:
Sep. 30, 2003
Mitsuhiro Yanari, Tokyo, JP;
Mitsuhiro Yanari, Tokyo, JP;
Nikon-Essilor Co., Ltd., Tokyo, JP;
Abstract
indicates the rotating point of the eyeball,indicates the first eye position,indicates the second eye position, andindicates the third eye position. The lines indicated by thick lines at the respective eye positions are the horizontal meridian and vertical meridian (principal meridian) of the cornea. As is seen from the figure, the directions of the horizontal meridian and vertical meridian of the cornea at the third eye position, in particular, do not coincide with the directions of the horizontal meridian and vertical meridian at the first eye position. In the present means, in order to perform aberration correction of the ophthalmic lens not only in the first eye position and second eye position but also in the third eye position under conditions that are suited to the prescription of the user and conditions of use, the prescription surface is made aspherical while taking into account the astigmatic axis of the eye at arbitrary eye positions in accordance with the laws of Donders-Listing. As a result, the prescription surface can be designed so that favorable optical characteristics can be obtained in the case of various specifications involving individual information such as the prescription of the ophthalmic lens user.