Methods of obtaining ophthalmic lenses providing the eye...

A - Human Necessities – 61 – F

Patent

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A61F 2/16 (2006.01) A61B 3/107 (2006.01)

Patent

CA 2431470

An intraocular coorection lens and a method of designing such a lens. According to the invention the lens is capable of reducing aberrations of an eye after its implantation and it is adapted to be placed between the cornea and the capsular bag of the eye. The method comprises according to the invention the steps of, (i) measuring the wavefront aberration of the uncorrected eye using a wavefront sensor; (ii) measuring the shape of at least one corneal surface in the eye using a corneal topographer; (iii) characterizing the at least one corneal surface and a lens located in the capsular bag of the eye comprising said cornea as mathematical models; (iv) calculating the resulting aberrations of said corneal surface(s) and the lens in said capsular bag by employing said mathematical models; (v) selecting an optical power of the intraocular correction lens; (vi) modeling the intraocular correction lens such that a wavefront arriving from an optical system comprising said intraocular correction lens and the mathematical models of said corneal and said lens in the capsular bag obtains reduced aberrations.

La présente invention concerne une lentille correctrice intraoculaire et un procédé permettant la conception d'une lentille de ce type. Selon l'invention, la lentille est capable de réduire les aberrations dans un oeil après son implantation, et est conçue pour être placée entre la cornée et le sac capsulaire de oeil. Le procédé comprend selon l'invention les étapes suivantes: (i) mesure de l'aberration de front d'ondes de oeil sans correction, au moyen d'un détecteur; (ii) mesure de la forme d'au moins une surface de cornée dans oeil, au moyen d'un topographe cornéen; (iii) caractérisation de la/des surface(s) de cornée et d'une lentille située dans le sac capsulaire de l'oeil comprenant ladite cornée en tant que modèles mathématiques; (iv) calcul des aberrations résultantes de la/desdites surface(s) de cornée et de la lentille dans ledit sac capsulaire, par utilisation desdits modèles mathématiques; (v) sélection d'une puissance optique de la lentille correctrice intraoculaire; (vi) modélisation de la lentille correctrice intraoculaire de sorte qu'un front d'ondes arrivant d'un système optique comprenant ladite lentille correctrice intraoculaire et les modèles mathématiques de ladite cornée et de ladite lentille située dans le sac capsulaire, permet d'obtenir des aberrations réduites.

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