Patent ID: 8529623
Filing Date: 2013-09-10
Classification: A61B,A61F,G01J,G02C

Abstract:
1. A diffractive multifocal intraocular lens for treatment of an eye of a patient, the eye comprising a cornea, the diffractive multifocal intraocular lens comprising: a diffractive pattern and at least one nonspherical surface, the lens having one base focus and at least one additional focus, wherein the lens is configured to reduce, when implanted in the patient's eye, a chromatic aberration and one or more monochromatic aberrations of the eye for at least one of the foci, wherein said at least one nonspherical surface is configured such that the lens for at least one of the foci, provides to a passing wavefront at least one wavefront aberration term having a value with opposite sign to a mean value of the same aberration term obtained from corneal measurements of a selected group of people, to which said patient is categorized, such that the lens is configured to, when implanted in the patient's eye, obtain a reduction of a wavefront arriving from the cornea of the patient's eye in said at least one aberration term provided by the cornea after passing said lens, wherein the lens is configured to reduce said chromatic aberration in a near focus as a result of the diffractive pattern and wherein at least one of the monochromatic aberrations is a spherical aberration that the lens is configured to reduce as a result of the at least one nonspherical surface, wherein the reduction of the spherical aberration is a predetermined fraction of a mean spherical aberration of said selected group of people to which the patient is categorized.