Invention Grant
- Patent Title: Progressive multifocal ophthalmic lens
- Patent Title (中): 渐进多焦点眼科镜片
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Application No.: US13578037Application Date: 2011-02-08
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Publication No.: US08757799B2Publication Date: 2014-06-24
- Inventor: Marie-Anne Berthezene , Bernard Bourdoncle , Laurent Calixte , Cyril Guilloux , Souazic Mousset , Damien Paille
- Applicant: Marie-Anne Berthezene , Bernard Bourdoncle , Laurent Calixte , Cyril Guilloux , Souazic Mousset , Damien Paille
- Applicant Address: FR Paris
- Assignee: Essilor International
- Current Assignee: Essilor International
- Current Assignee Address: FR Paris
- Agency: Polsinelli PC
- Priority: FR1050896 20100209
- International Application: PCT/IB2011/050528 WO 20110208
- International Announcement: WO2011/098951 WO 20110818
- Main IPC: G02C7/06
- IPC: G02C7/06

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.
Public/Granted literature
- US20130148078A1 PROGRESSIVE MULTIFOCAL OPHTHALMIC LENS Public/Granted day:2013-06-13
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