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US 2009/0270984 A1Published application
Intraocular lens
AssigneeHoya Corporation
InventorsDemas Sanger, Tjundewo Lawu
Life of this patent
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AssigneeHoya Corporation
InventorsDemas Sanger, Tjundewo Lawu
Estimating the term…
An intraocular lens in which deterioration in contrast is suppressed even when the optical axis of the intraocular lens is decentred from the optical axis of the eyeball when the intraocular lens is inserted into the eye while the advantage of a conventional aberration reduction type intraocular lens that the image is seen clearly is sustained by employing such a power distribution as respectively having at least one positive power deviation region (E1) having a power larger than that represented by the reference power distribution and at least one negative power deviation region (E2) having a power smaller than that represented by the reference power distribution in the central region of the intraocular lens assuming that a power distribution being set to cancel the spherical aberration of cornea when the intraocular lens is inserted into the eye is the reference power distribution.
An intraocular lens in which deterioration in contrast is suppressed when an optical axis of the intraocular lens inserted into an eye is decentred from an optical axis of an eyeball, by employing such a power distribution as respectively having at least one positive power deviation region having a larger power than that represented by a reference power distribution and at least one negative power deviation region having a smaller power than that represented by the reference power distribution in a region in the vicinity of the center of the intraocular lens, assuming that the reference power distribution being set to cancel a spherical aberration of cornea when the intraocular lens is inserted into the eye.
Dependencies are inferred from the claim text.