Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Celine Carimalo0
Cyril Guilloux0
Diane De Gaudemaris0
Marie-Anne Berthezene0
Date of Patent
December 29, 2009
0Patent Application Number
117246040
Date Filed
March 15, 2007
0Patent Primary Examiner
Patent abstract
A method for the determination of a progressive ophthalmic lens for a given wearer comprises the stages of:determining the axial length (LA) of the wearer's eye,determining an ergorama associating a sight point with each direction of viewing under wearing conditions,determining power and resulting astigmatism defect targets for each direction of viewing under wearing conditions, the targets being a function of the axial length of the wearer's eye,calculating the power required on the lens for each direction of viewing by successive iterations in order to obtain the target power defect and the target resulting astigmatism.
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