Multifocal ophthalmic lens

Details Multifocal ophthalmic lens Multifocal ophthalmic lens

A - Human Necessities

61

F

A61F 2/16 (2006.01) A61F 2/14 (2006.01) G01J 9/00 (2006.01) G02B 5/18 (2006.01) G02C 7/02 (2006.01) G02C 7/04 (2006.01) G02C 7/06 (2006.01)

Patent

CA 2507659

A method of designing a multifocal ophthalmic lens with one base focus and at least one additional focus, capable of reducing aberrations of the eye for at least one of the foci after its implantation, comprising the steps of: (i) characterizing at least one corneal surface as a mathematical model; (ii) calculating the resulting aberrations of said corneal surface(s) by employing said mathematical model; (iii) modelling the multifocal ophthalmic lens such that a wavefront arriving from an optical system comprising said lens and said at least one corneal surface obtains reduced aberrations for at least one of the foci. There is also disclosed a method of selecting a multifocal intraocular lens, a method of designing a multifocal ophthalmic lens based on corneal data from a group of patients, and a multifocal ophthalmic lens.

Procédé de conception de lentille ophtalmique multifocale comportant un foyer de base et au moins un foyer supplémentaire, qui permet, après implantation, de réduire les aberrations de l'oeil pour au moins un des foyers. Le procédé comporte les étapes consistant à : (1) caractériser au moins une surface cornéenne comme modèle mathématique ; (2) calculer les aberrations obtenues de la ou des surfaces cornéennes à l'aide du modèle mathématique ; (3) modéliser la lentille ophtalmique multifocale afin qu'un front d'onde provenant d'un système optique comprenant ladite lentille et cette ou ces surfaces cornéennes produise des aberrations réduites pour au moins des foyers. L'invention concerne aussi un procédé de sélection de lentille ophtalmique multifocale, un procédé de conception de lentille ophtalmique multifocale basé sur des données relatives à la cornée d'un groupe de patients, et une lentille ophtalmique multifocale.

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