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Zonal diffractive multifocal intraocular lens with central monofocal diffractive region

A single-focal and multi-focal technology, applied in the field of multi-focal intraocular lenses, can solve the problems of chromatic aberration, chromatic aberration, and suboptimality of patients' eyes

Inactive Publication Date: 2012-05-16
NOVARTIS AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, many conventional IOLs exhibit excellent aberrations, chromatic aberrations that can reduce the IOL's efficiency in focusing light energy incident on it onto the patient's retina
Such conventional IOLs are also generally not designed to address the chromatic aberrations inherent in the optics of the patient's eye
Additionally, many conventional multifocal IOLs may not be optimal for distance viewing because they direct a significant fraction of the light energy to the near focus even for small pupil sizes

Method used

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  • Zonal diffractive multifocal intraocular lens with central monofocal diffractive region
  • Zonal diffractive multifocal intraocular lens with central monofocal diffractive region
  • Zonal diffractive multifocal intraocular lens with central monofocal diffractive region

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Embodiment Construction

[0032]The present invention generally provides multifocal ophthalmic lenses, e.g., multifocal intraocular lenses (IOLs), which employ a monofocal diffractive structure to provide primarily a single focusing power (e.g., a far focus power), and employ a multifocal diffractive structure ( Typically a bifocal diffractive structure) to provide multiple focusing powers (eg far focus and near focus power). In the following examples, salient features of various aspects of the invention are discussed in connection with intraocular lenses (IOLs). The teachings of the present invention can also be applied to other ophthalmic lenses, such as contact lenses. The term "intraocular lens" and its abbreviation "IOL" are used interchangeably herein to describe a lens that is implanted inside the eye to replace the eye's natural lens or to enhance vision regardless of whether the natural lens is removed. Intracorneal lenses and phakic intraocular lenses are examples of lenses that can be impla...

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Abstract

An ophthalmic lens includes an optic having an anterior surface and a posterior surface. The lens also includes a monofocal diffractive structure disposed on one of said surfaces for providing a diffractive focusing power. The lens further includes at least one multifocal diffractive structure disposed on one of said surfaces for providing a plurality of diffractive focusing powers. The multifocal diffractive structure is adapted to provide chromatic aberration compensation for near vision.

Description

[0001] priority application [0002] This application claims priority to US Provisional Application Serial No. 61 / 185,512, filed June 9, 2009, the contents of which are hereby incorporated by reference. [0003] related application [0004] This application is related to co-pending application Serial No. _________, entitled "IOL WITH VARYING CORRECTION OF CHROMATIC ABERRATION," which claims the benefit of application Serial No. 61 / 185,510 filed on the same date as the application from which this application claims priority. priority. technical field [0005] The present invention relates generally to multifocal ophthalmic lenses, and more particularly to multifocal intraocular lenses (IOLs) that provide compensation for chromatic aberrations. Background technique [0006] Intraocular lenses are often used to replace a blocked natural lens through cataract surgery. In other cases, an intraocular lens can be implanted in a patient's eye while retaining the natural lens to i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/04A61F2/16
CPCG02C2202/22G02C7/041A61F2/1613G02C2202/20A61F2/1616A61F2/1637A61F2/1654A61F2/16G02C7/04G02B3/10
Inventor 洪昕张晓啸
Owner NOVARTIS AG
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