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:
Jun. 24, 2014
Filed:
Feb. 08, 2011
Marie-anne Berthezene, Charenton le Pont, FR;
Bernard Bourdoncle, Charenton le Pont, FR;
Laurent Calixte, Charenton le Pont, FR;
Cyril Guilloux, Charenton le Pont, FR;
Souazic Mousset, Charenton le Pont, FR;
Damien Paille, Charenton le Pont, FR;
Marie-Anne Berthezene, Charenton le Pont, FR;
Bernard Bourdoncle, Charenton le Pont, FR;
Laurent Calixte, Charenton le Pont, FR;
Cyril Guilloux, Charenton le Pont, FR;
Souazic Mousset, Charenton le Pont, FR;
Damien Paille, Charenton le Pont, FR;
Essilor International, Paris, FR;
Abstract
Implementations described and claimed herein provide a complex surface of a progressive multifocal ophthalmic lens. In one implementation, the complex surface includes: a difference in ratio between cylinder value and surface addition less than 0.2 in absolute value; a first ratio between a maximum cylinder value for all points in a grouping circle and a surface addition; and a second ratio between a maximum cylinder value for all points on a disc and a surface addition. In another implementation, the complex surface includes: a difference in ratio between resultant astigmatism value and prescribed addition less than 0.3 in absolute value; a first ratio between a value of resultant astigmatism for all directions of gaze passing through an angular circle and a surface addition; and a second ration between a value of resultant astigmatism for all directions of gaze passing inside the angular circle and a prescribed addition.