Intraocular lens alignment using corneal center
First Claim
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1. A method for generating an alignment alignment guide for surgeon to assist in intraocular lens placement in an eye, comprising:
- collecting preoperative corneal topography data comprising a corneal vertex location and a pupil center location for an eye that is not dilated;
determining an offset between the corneal vertex location and the pupil center location;
determining alignment data for an intraocular lens based on the offset;
locating a dilated pupil center for an image of the eye taken by a camera after the eye is dilated using image analysis software;
determining an adjusted offset between the corneal vertex and the dilated pupil center; and
displaying adjusted alignment data on the image of the eye based on the adjusted offset.
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Abstract
A method for generating a radial alignment guide for an eye includes collecting preoperative corneal topography data. The data includes a corneal vertex location and a pupil center location for an eye that is not dilated. The method then includes locating a dilated pupil center for the eye after the eye is dilated. The method further includes determining an adjusted offset between the corneal vertex and the dilated pupil center and displaying alignment data on an image of the eye based on the adjusted offset.
26 Citations
23 Claims
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1. A method for generating an alignment alignment guide for surgeon to assist in intraocular lens placement in an eye, comprising:
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collecting preoperative corneal topography data comprising a corneal vertex location and a pupil center location for an eye that is not dilated; determining an offset between the corneal vertex location and the pupil center location; determining alignment data for an intraocular lens based on the offset; locating a dilated pupil center for an image of the eye taken by a camera after the eye is dilated using image analysis software; determining an adjusted offset between the corneal vertex and the dilated pupil center; and displaying adjusted alignment data on the image of the eye based on the adjusted offset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for generating an alignment guide for a surgeon to assist in intraocular lens placement in an eye, comprising:
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a memory operable to store preoperative corneal topography data comprising a corneal vertex location and a pupil center location for an eye that is not dilated, an offset between the corneal vertex location and the pupil center location, and preoperative alignment data for an intraocular lens based on the offset; a processor operable to locate a dilated pupil center for an image of the eye taken by a camera after the eye is dilated and determine an adjusted offset between the corneal vertex and the dilated pupil center; and a display operable to display adjusted alignment data on the image of the eye based on the adjusted offset. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. Software embodied in a computer-readable medium executable by a processor to perform the steps of:
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collecting preoperative corneal topography data comprising a corneal vertex location and a pupil center location for an eye that is not dilated, an offset between the corneal vertex location and the pupil center location, and preoperative alignment data for an intraocular lens based on the offset; locating a dilated pupil center for an image of the eye taken by a camera after the eye is dilated; determining an adjusted offset between the corneal vertex and the dilated pupil center; and displaying adjusted alignment data on the image of the eye based on the adjusted offset. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification