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Intraocular lens with extended depth of focus

A technology of intraocular lens and optical power, which is applied in the direction of intraocular lens, prosthesis, household appliances, etc., can solve problems such as poor visual quality, loss of incident light, difficulty in intermediate vision, etc.

Pending Publication Date: 2022-03-18
PHYSIOL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, multifocal IOLs typically have a limited number of two or three foci while providing poor visual quality out of focus
In the case of e.g. bifocal IOLs designed to have two focal points for near and distance respectively, this can lead to difficulties with intermediate vision which then lead to the patient having to wear glasses
Another disadvantage in the specific case of diffractive multifocal IOLs is related to the presence of a proportionate (approximately 18%) loss of incident light at high diffraction orders, which produces focal points outside the visually useful distance range
In addition, multifocal IOLs have other adverse side effects such as scattered light, halos, and glare

Method used

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  • Intraocular lens with extended depth of focus
  • Intraocular lens with extended depth of focus
  • Intraocular lens with extended depth of focus

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Embodiment Construction

[0231] This section presents specific preferred embodiments of the present invention. The embodiments are described with reference to the accompanying drawings, but the present invention is not limited by these referenced drawings. In particular, the drawings or figures described below are only schematic and not limiting in any way. This detailed description will only relate to preferred embodiments of the invention, wherein the first surface and the second surface are the front optical surface and the rear optical surface, respectively. Then, for the convenience of reading, the indicators st and nd are replaced by the indicators ant and post, respectively. Furthermore, the reference numeral 2 (respectively, 3) is used in the detailed description and the drawings to denote the front (respectively, rear) optical surface (which then corresponds to the first (in turn, the second) surface).

[0232] As shown in the figure below, the present invention provides a refractive intrao...

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Abstract

The invention relates to an intraocular lens (1) with an extended depth of focus, said intraocular lens (1) comprising an aspheric front and rear optical surface (2, 3).

Description

Technical field [0001] The present invention relates to an intraocular lens (IOL). More specifically, the present invention relates to an intraocular lens with extended depth of focus (EDOF). Background technique [0002] Age-related changes in proteins in the eye's natural lens can lead to the formation of cataracts. In cataract surgery, an IOL is often used to replace the natural lens. [0003] Implantation of a monofocal IOL usually provides good quality vision by selecting the appropriate IOL power, usually for distance. [0004] However, the eye with an IOL implant loses residual accommodation. Therefore, patients with monofocal IOLs often need to wear near and intermediate glasses during activities that require finer vision. This refers to a wide range of activities that may have a strong impact on the patient's daily life, such as reading and computer work. [0005] Today, patients increasingly want to avoid wearing glasses for myopia after cataract surgery. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/16
CPCA61F2/1613A61F2/1616A61F2/164A61F2002/1681A61F2/1602A61F2/1618A61F2240/004B29D11/023
Inventor 苏珊娜·马科斯·塞莱斯蒂诺卡洛斯·多龙索罗·迪亚兹苏亚德·瑞德佐维克克里斯多夫·帕纽利
Owner PHYSIOL