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Iol with varying correction of chromatic aberration

A lens and chromatic aberration technology, applied in the field of intraocular lenses, which can solve problems such as reduced efficiency

Active Publication Date: 2013-11-06
ALCON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Iol with varying correction of chromatic aberration
  • Iol with varying correction of chromatic aberration
  • Iol with varying correction of chromatic aberration

Examples

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Embodiment Construction

[0020] The present invention generally provides intraocular lenses with two diffractive structures having a common focus which are used in combination with optical filters to provide chromatic aberration in two different wavelength ranges to limit the color spectrum requiring correction. The first diffractive structure provides chromatic aberration correction for relatively long wavelengths above 550 nm, and the second diffractive structure surrounding the first diffractive structure provides chromatic aberration correction in the shorter wavelength range while allowing chromatic aberration in the longer wavelength range. In operation, the combination of diffractive structures provides good chromatic aberration correction for small pupil conditions. The outer diffractive elements function in large pupil conditions to provide sharp images at shorter wavelengths without chromatic aberration, corresponding to the peak sensitivity of the eye in low light conditions. The combinatio...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/02G02C7/04A61F2/16
CPCG02C2202/22G02C7/041A61F2/1654A61F2/1613G02C2202/20
Inventor 张晓啸C·E·库拉图K·文卡特斯瓦兰D·R·卡森M·卡拉克雷洪昕刘悦皑
Owner ALCON INC