Intraocular lens alignment

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...

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

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