Intraocular lens alignment

An intraocular lens, data technology, applied in the field of radial alignment guide system, can solve the problems of negative effects of infection, inaccurate marking, drift, etc.

Active Publication Date: 2012-01-18
ALCON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Marks obtained by markers may be imprecise and may wash out or drift
Furthermore, piercing the cornea is invasive and carries considerable risk of infection and / or other side effects

Method used

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  • Intraocular lens alignment
  • Intraocular lens alignment
  • Intraocular lens alignment

Examples

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Embodiment Construction

[0019] In various embodiments of the invention, toric intraocular lens (IOL) alignment for cataract surgery is improved by providing a precise radial grid or alignment guide to assist the surgeon in lens placement. A slit lamp microscope may be used to obtain images of the eye, and image overlays including radial grids, lens alignment guides, and / or other fiducials for rotational alignment may be provided as surgical guides in any suitable form, The modalities include computer displays, printed images of the eye displaying information, or projected directly onto the eye during the procedure.

[0020] According to various methods and systems described herein, a radial grid is centered on the pupil center and overlaid on the image of the eye (or directly on the eye in one embodiment). The center of the pupil may be located, for example, automatically using any suitable center-finding image processing technique, or manually by clicking on a computer interface or the like. For ex...

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Abstract

A method for generating a radial alignment guide for an eye includes collecting preoperative alignment data relative to a pupil from an eye that is not dilated. The method also includes locating a pupil center of the eye while dilated. The method further includes displaying the alignment data on an image of the dilated eye relative to the pupil center. In particular embodiments, software embodied in a computer-readable medium is executable by a processor to perform the steps of such a method.

Description

[0001] related application [0002] This application claims priority to Provisional Application Serial No. 61 / 153,709 filed February 19, 2009 and Provisional Application Serial No. 61 / 155,562 filed February 26, 2009. Background technique [0003] Over the past decade, eye surgeons have tried various methods to correct pre-existing astigmatism during cataract eye surgery, including incisions into the cornea to alter the shape of the eye. Now thanks to the unique design of the toric intraocular lens (IOL), astigmatism can be reduced or corrected without further surgical intervention. A toric IOL restores the focus of the eye when the natural lens or cataract is removed, but it is also designed to correct pre-existing astigmatism using the same technology that has been used successfully with contact lenses. [0004] Prior to surgery, the amount of corneal astigmatism that needs to be corrected must be determined. Typically, the procedure is as follows: [0005] 1. Preoperative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/11A61B3/135A61F3/16
CPCA61B3/135A61B3/11A61F2/16A61F2/1602A61F2/1662A61F9/0017A61F9/007A61F9/013A61B3/0025A61B3/0041A61F2/1645A61B3/15A61B3/0058A61F9/0008
Inventor I·李维斯K·拉缇B·纳里波特斯基
Owner ALCON INC
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