Method to Guide a Cataract Procedure by Corneal Imaging

• US 20100324542A1
• Filed: 06/24/2010
• Published: 12/23/2010
• Est. Priority Date: 11/02/2007
• Status: Abandoned Application

• Current Assignee: Alcon LenSx, Inc. (Alcon Incorporated)
• Original Assignee: LensX Lasers, Inc. (Alcon Incorporated)
• Inventors: Kurtz, Ronald M.
• Application Number:
  US12/823,040
• Publication Number:
  US 20100324542A1
• Time in Patent Office: Days
• US Class Current: 606/6
• CPC Class Codes: A61B 2090/3937 Visible markers
• CPC Class Codes: A61F 2009/00851 Optical coherence topography [OCT]
• CPC Class Codes: A61F 2009/00855 Calibration of the laser system
• CPC Class Codes: A61F 2009/0087 Lens
• CPC Class Codes: A61F 2009/00872 Cornea
• CPC Class Codes: A61F 2009/0088 based on wavefront
• CPC Class Codes: A61F 2009/00882 based on topography
• CPC Class Codes: A61F 2009/00887 Cataract
• CPC Class Codes: A61F 2009/00889 Capsulotomy
• CPC Class Codes: A61F 9/008 using laser
• CPC Class Codes: A61F 9/00825 for photodisruption
• CPC Class Codes: A61F 9/00827 Refractive correction, e.g. lenticle
• CPC Class Codes: A61F 9/00836 Flap cutting

Abstract

A method of performing a cataract procedure may include the steps of: imaging one or more corneal marks created by a corneal procedure, determining corneal location information regarding a location of a treatment region of the corneal procedure based on the imaged corneal marks, and placing laser pulses for a cataract surgery using the corneal location information. A corresponding ophthalmic laser system may include an imaging system to image a corneal region of an eye, an image analyzer to facilitate a determination of corneal location information based on one or more image provided by the imaging system, and a surgical laser system to place laser pulses into a lens of the eye using the corneal location information. The imaging system may include an ophthalmic coherence tomographic (OCT) system.

Claims

1. A method of performing a cataract procedure, the method comprising the steps of:

imaging one or more corneal marks, created by a corneal procedure;

determining corneal location information regarding a location of a treatment region of the corneal procedure based on the imaged corneal marks; and

placing laser pulses for a cataract surgery using the corneal location information.

2. The method of claim 1, the one or more corneal marks comprising:

a mark related to a corneal flap, created as part of a LASIK procedure with a femtosecond laser.

3. The method of claim 1, the imaging step comprising:

using an ophthalmic coherence tomographic (OCT) imaging system.

4. The method of claim 1, the determining the corneal location information step comprising:

determining at least one of a perimeter of the corneal flap, a center of the corneal flap, a position of the corneal flap relative to an optical axis of the cataract surgical system, or a position of the corneal flap relative to a location of the lens of the eye.

5. The method of claim 1, the placing the laser pulses step comprising:

placing the laser pulses in an approximate circle into a lens capsule as part of a capsulotomy procedure, wherein

the circle is essentially concentric with a perimeter of a corneal flap, determined in the determining the corneal location information step.

6. The method of claim 1, the placing the laser pulses step comprising:

placing the laser pulses into a nucleus of the eye to create cataract surgical patterns using the determined corneal location information.

7. The method of claim 6, the placing the laser pulses into the nucleus step comprising:

placing the laser pulses in the cataract surgical pattern centered in relation to a determined center of a corneal flap, wherein

the cataract surgical pattern is at least one of a circular pattern, a spiral pattern, a radial pattern, or a chop pattern.

8. The method of claim 1, the placing the laser pulses step comprising:

placing the laser pulses for the cataract surgery to balance an undesirable outcome of the prior corneal procedure, wherein

the undesirable outcome was determined from the image provided by the imaging one or more corneal mark step.

9. An ophthalmic laser system, comprising:

an imaging system, configured to image a corneal region of an eye;

an image analyzer configured to facilitate a determination of corneal location information based on one or more image provided by the imaging system; and

a surgical laser system, configured to place laser pulses into a lens of the eye using the corneal location information.

10. The laser system of claim 9, the imaging system comprising:

an ophthalmic coherence tomographic (OCT) system.

11. The laser system of claim 9, the surgical laser system comprising:

a femtosecond laser system, configured to create cataract surgical patterns in the lens.

12. The laser system of claim 9, the image analyzer comprising:

a processor, configured and programmed to analyze an image generated by the imaging system.

13. The laser system of claim 12, wherein:

the processor is configured

to fit a circle to an image of a LASIK flap in the cornea, imaged by the imaging system;

to determine a location of a center of the fitted circle;

to generate a cataract surgical pattern centered with the determined center of the fitted circle; and

to guide the surgical laser system to place laser pulses into the lens according to the generated cataract surgical patterns.

14. The laser system of claim 9, the image analyzer comprising:

a video-microscope, configured to assist an operator of the laser system to determine the corneal location information.

15. The laser system of claim 9, the image analyzer comprising:

a system memory, configured to store the corneal location information.

16. A method of performing a cataract procedure, the method comprising the steps of:

imaging a portion of a cornea before and after a corneal procedure;

determining corneal shape-change information by comparing pre-procedure images with post-procedure images of a treatment region of the corneal procedure; and

placing laser pulses for cataract surgery using the corneal shape-change information.

17. The method of claim 16, comprising:

selecting an intra-ocular lens based on the corneal shape-change information; and

inserting the selected intra-ocular lens into a capsular bag of the eye.

18. An ophthalmic laser system, comprising:

an imaging system, configured to image a corneal region of an eye before and after a corneal procedure;

an image analyzer, configured to facilitate a determination of a corneal shape-change information based on one or more images provided by the imaging system before and after the corneal procedure; and

a surgical laser system, configured to place laser pulses into a lens of the eye using the determined corneal shape-change information.

19. The ophthalmic laser system of claim 18, the image analyzer comprising:

a processor, configured

to facilitate a determination of the corneal shape-change information by comparing pre-procedure images with post-procedure images of a treatment region of the corneal procedure.

20. The ophthalmic laser system of claim 18, comprising:

a surgical laser system, configured to place laser pulses into the cornea of the eye using the determined corneal shape-change information.

21. The ophthalmic laser system of claim 20, wherein:

the ophthalmic laser system is configured to create LASIK flaps and cataract surgery incisions.

22. A method of performing an integrated ophthalmic procedure, the method comprising the steps of:

imaging a portion of a cornea before a corneal procedure;

performing a corneal LASIK procedure;

determining corneal shape-change information by comparing pre-procedure images with post-procedure images of a treatment region of the corneal LASIK procedure;

placing laser pulses for cataract surgery using the corneal shape-change information;

selecting an intra-ocular lens based on the corneal shape-change information; and

inserting the selected intra-ocular lens into a capsular bag of the eye.