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Lens surface with combined diffractive, toric, and aspheric components

A toric and aspheric technology, applied in the field of diffractive ophthalmic lenses, can solve the problems of expensive and time-consuming IOL

Inactive Publication Date: 2014-07-23
ALCON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, making such IOLs can be time-consuming and expensive

Method used

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  • Lens surface with combined diffractive, toric, and aspheric components
  • Lens surface with combined diffractive, toric, and aspheric components
  • Lens surface with combined diffractive, toric, and aspheric components

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Embodiment Construction

[0036] The present invention mainly relates to a diffractive ophthalmic lens, which can provide compensation for spherical aberration and astigmatic aberration, and can provide far focus and near focus refractive power. In the following examples, various aspects of the invention will be discussed in connection with an intraocular lens (IOL). However, it should be understood that the teachings of the present invention are also applicable to other ophthalmic lenses, such as contact lenses. Furthermore, the term "intraocular lens" and its abbreviation "IOL" are used interchangeably herein to describe a lens that can be implanted in the eye to replace the eye's natural lens or to enhance vision with or without removal of the natural lens.

[0037] refer to figure 1 , an IOL 10 according to one embodiment of the present invention includes an optic 12 having an anterior optical surface 14 and a posterior optical surface 16 . The IOL also includes a plurality of fixation members or...

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Abstract

The present invention provides in one aspect an intraocular lens (IOL) comprising an optic having a surface and a posterior surface, and a plurality of diffractive regions disposed on one of the anterior and posterior surfaces. The surface having the plurality of diffractive regions has a profile characterized by a combination of an aspheric portion and a toric portion.

Description

technical field [0001] This invention relates generally to ophthalmic lenses, and more particularly to diffractive ophthalmic lenses that provide compensation for a variety of aberrations. Background technique [0002] During cataract surgery, an intraocular lens (IOL) is usually implanted in the patient's eye to replace the natural lens. In some cases, an IOL may include diffractive structures so as to have not only far-focus optical power, but also near-focus optical power, thereby providing a degree of pseudoaccommodation. Various aberrations, such as spherical and astigmatic aberrations, can adversely affect the optical properties of such lenses. For example, spherical aberration can reduce visual contrast, especially for large pupil sizes. [0003] Diffractive IOLs are known that provide compensation for various aberrations. However, making such IOLs can be time-consuming and expensive. [0004] Accordingly, there is a need for an improved ophthalmic lens, particula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/16G02C7/04G02B5/18
CPCG02B3/06A61F2/1613G02B3/08G02B5/1876G02B3/04A61F2/1654A61F2/164A61F2/1645Y10T82/10Y10T82/16016Y10T82/2502
Inventor 洪昕D·摩根
Owner ALCON INC