Patent ID: 7377641
Filing Date: 2008-05-27
Classification: A61B,A61F,G01J,G02C

Abstract:
1. A method of designing a multifocal ophthalmic lens, comprising: selecting a representative group of patients; collecting corneal topographic data for each subject in the group; transferring the data to terms representing a corneal surface shape of each subject for a preset aperture size; for a mean cornea, calculating at least one of a mean corneal surface shape term and a mean corneal wavefront aberration term, the mean corneal wavefront aberration term being obtained by transforming the mean corneal surface shape term; from at least one of the mean corneal surface shape term and the mean corneal wavefront aberration term, designing a multifocal ophthalmic lens capable of reducing a wavefront aberration term of an optical system comprising the mean cornea and the lens for at least one foci of the lens; and calculating an aspheric surface descriptive constant for the lens to be designed from the mean corneal surface shape terms or from the mean corneal wavefront aberration terms for a predetermined radius.