Iol with varying correction of chromatic aberration

Abstract

An ophthalmic lens includes an optical filter operable to filter out at least visible light having a wavelength less than 450 nm. The lens also includes a first diffractive structure adapted to produce a focus for visible light in a first wavelength range above 550 nm and to reduce longitudinal chromatic aberration to less than one diopter for incoming visible light in the first wavelength range. The lens also includes a second diffractive structure outside the first diffractive structure in a radial direction and adapted to produce a focus for visible light in a second wavelength range between 450 nm and 550 nm. The second diffractive structure is also adapted to reduce longitudinal chromatic aberration for incoming visible light in the second wavelength range to less than one diopter while allowing longitudinal chromatic aberration in the first wavelength range in an amount greater than the first diffractive structure.

Description

[0001] priority application [0002] This application claims priority to US Provisional Application Serial No. 61 / 185,510, filed June 9, 2009, the contents of which are incorporated herein by reference. [0003] related application [0004] This application is related to co-pending Application Serial No. 12 / 780,244, entitled "ZONAL DIFFRACTIVE MULTIFOCAL INTRAOCULAR LENS WITH CENTRAL MONOFOCAL DIFFRACTIVE REGION," claiming priority to Application Serial No. 61 / 185,512, which is the same as that claimed in this application The priority application is filed on the same day. technical field [0005] The present invention relates generally to ophthalmic lenses, and more particularly to intraocular lenses (IOLs) that provide chromatic aberration compensation. Background technique [0006] Intraocular lenses are routinely used following cataract surgery to replace the clouded natural crystalline lens. In other cases, an intraocular lens can be implanted in a patient's eye while...

AI Technical Summary

Problems solved by technology

[0007] However, many commonly used IOLs exhibit chromatic aberration, which can make these IOLs less efficient at focusing light energy incident on them onto the patient's retina

Such commonly used IOLs are also generally not designed to account for chromatic aberrations inherent in the lens and / or present in the optics of the patient's eye

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