Invention Grant
- Patent Title: Progressive multifocal ophthalmic lens
- Patent Title (中): 渐进多焦点眼科镜片
-
Application No.: US13578050Application Date: 2011-02-08
-
Publication No.: US08876288B2Publication Date: 2014-11-04
- Inventor: Marie-Anne Berthezene , Bernard Bourdoncle , Laurent Calixte , Cyril Guilloux , Soazic Mousset , Damien Paille
- Applicant: Marie-Anne Berthezene , Bernard Bourdoncle , Laurent Calixte , Cyril Guilloux , Soazic Mousset , Damien Paille
- Applicant Address: FR Charenton-le Pont
- Assignee: Essilor International (Compagnie Generale d'Optique)
- Current Assignee: Essilor International (Compagnie Generale d'Optique)
- Current Assignee Address: FR Charenton-le Pont
- Agency: Polsinelli PC
- Priority: FR1050897 20100209
- International Application: PCT/IB2011/050529 WO 20110208
- International Announcement: WO2011/098952 WO 20110818
- Main IPC: G02C7/06
- IPC: G02C7/06

Abstract:
The invention relates to a finished or semi-finished lens which comprises: a disc containing all the points of the lens that have the same abscissa and the same ordinate as points located within a circle in the reference plane having a diameter of 30 millimeters and centered on the prism reference point; a progression length of less than 14.5 millimeters; a first specific point having a cylinder value equal to the maximum cylinder value of all the points of the lens located in the nasal area and in the disc; and a second specific point having a cylinder value equal to the maximum cylinder value of all the points of the lens located in the temporal area and in the disc; a first ratio between: the maximum gradient of the cylinder for the points of the lens that have the same abscissa and the same ordinate as the points located on segments connecting the mounting cross to the first and second specific points, and surface addition of less than 0.095 per millimeter; and a second ratio between: the maximum cylinder value of the first and second specific points, and surface addition of no more than 0.85. The invention enhances the comfort of the wearer.
Public/Granted literature
- US20130038833A1 PROGRESSIVE MULTIFOCAL OPHTHALMIC LENS Public/Granted day:2013-02-14
Information query