Closed-loop laser eye surgery treatment

Patent metadata

Field	Value
Publication number	US-2016228296-A1
Application number	US-201514968783-A
Country	US
Kind code	A1
Filing date	Dec 14, 2015
Priority date	Feb 6, 2015
Publication date	Aug 11, 2016
Grant date	—

Abstract

A laser eye surgery system includes a laser to generate a laser beam. A topography measurement system measures corneal topography. A processor is coupled to the laser and the topography measurement system, the processor embodying instructions to measure a first corneal topography of the eye. A first curvature of the cornea is determined. A target curvature of the cornea that treats the eye is determined. A first set of incisions and a set of partial incisions in the cornea smaller than the first set of incisions are determined. The set of partial incisions is incised on the cornea by the laser beam. A second corneal topography is measured. A second curvature of the cornea is determined. The second curvature is determined to differ from the target curvature and a second set of incisions are determined. The second set of incisions is incised on the cornea.

First claim

What is claimed is:

1 . A method of treating an eye, comprising:
measuring a first corneal topography of the eye; determining a first curvature of the cornea based on the first corneal topography, and a target curvature of the cornea that treats the eye; determining a first set of incisions in the cornea to achieve the target curvature in the cornea and a set of partial incisions in the cornea smaller than the first set of incisions; performing the set of partial incisions on the cornea by a laser; measuring a second corneal topography after performing the set of partial incisions; determining a second curvature of the cornea on the basis of the second corneal topography; determining that the second curvature differs from the target curvature; determining a second set of incisions in the cornea different from the first set of incisions to achieve the target curvature in the cornea; and performing the second set of incisions on the cornea by the laser.

2 . The method of claim 1 , further comprising:
measuring a third corneal topography after performing the second set of incisions; determining a third curvature of the cornea on the basis of the third corneal topography; determining that the third curvature differs from the target curvature; determining a third set of incisions to achieve the target curvature in the cornea; and performing the third set of incisions on the cornea; measuring a fourth corneal topography after performing the third set of incisions; and determining a fourth curvature of the cornea on the basis of the fourth corneal topography; and determining that the fourth curvature achieves the target curvature.

3 . The method of claim 1 , wherein the first set of incisions and the second set of incisions are based on a nomogram.

4 . The method of claim 3 , further comprising:
determining the set of partial incisions based on a predetermined uncertainty level of the nomogram.

5 . The method of claim 1 , wherein the second set of incisions overlaps the first set of incisions so as to deepen the first set of incisions.

6 . The method of claim 1 , wherein the second set of incisions are parallel to the first set of incisions.

7 . The method of claim 1 , wherein the corneal topography measurement uses optical coherence tomography imaging.

8 . The method of claim 1 , wherein the second corneal topography measures a volume of bubbles formed as a result of the set of partial incisions.

9 . The method of claim 1 , wherein the laser is a femtosecond laser.

10 . The method of claim 1 , wherein the method treats higher order aberrations of the eye.

11 . A laser eye surgery system, comprising:
a laser to generate a laser beam; a topography measurement system for measuring topography of the cornea of the eye; a processor coupled to the laser and the topography measurement system, the processor comprising a tangible non-volatile computer recordable medium embodying instructions to:
measuring a first corneal topography of the eye using the topography measurement system;
determining a first curvature of the cornea based on the first corneal topography, and a target curvature of the cornea that treats the eye;
determining a first set of incisions in the cornea to achieve the target curvature in the cornea and a set of partial incisions in the cornea smaller than the first set of incisions;
performing the set of partial incisions on the cornea by the laser beam generated by the laser;
measuring a second corneal topography using the topography measurement system after performing the set of partial incisions;
determining a second curvature of the cornea on the basis of the second corneal topography;
determining that the second curvature differs from the target curvature;
determining a second set of incisions in the cornea different from the first set of incisions to achieve the target curvature in the cornea; and
performing the second set of incisions on the cornea by the laser beam generated by the laser.

12 . The system of claim 11 , wherein the processor comprising a tangible medium embodying instructions to:
measuring a third corneal topography using the topography measurement system after performing the second set of incisions; determining a third curvature of the cornea on the basis of the third corneal topography; determining that the third curvature differs from the target curvature; determining a third set of incisions to achieve the target curvature in the cornea; and performing the third set of incisions on the cornea by the laser beam generated by the laser; measuring a fourth corneal topography using the topography measurement system after performing the third set of incisions; determining a fourth curvature of the cornea on the basis of the fourth corneal topography; and determining that the fourth curvature achieves the target curvature.

13 . The system of claim 11 , wherein the first set of incisions and the second set of incisions are based on a nomogram.

14 . The method of claim 13 , further comprising:
determining the set of partial incisions based on a predetermined uncertainty level of the monogram.

15 . The system of claim 11 , wherein the second set of incisions overlaps the first set of incisions so as to deepen the first set of incisions.

16 . The system of claim 11 , wherein the second set of incisions is parallel to the first set of incisions.

17 . The system of claim 11 , wherein the corneal topography measurement uses optical coherence tomography imaging.

18 . The system of claim 11 , wherein the second corneal topography measures a volume of bubbles formed as a result of the set of partial incisions.

19 . The system of claim 11 , wherein the laser is a femtosecond laser.

20 . The system of claim 11 treating higher order aberrations of the eye.

Assignees

• Optimedica Corp

Inventors

• Woodley Bruce R
• Simoneau Michael J
• Woo Raymond
• Gonzalez Javier G

Classifications

• A61F2009/00859

  considering nomograms · CPC title

• A61F9/00804

  Refractive treatments · CPC title

• A61F2009/00882

  based on topography · CPC title

• A61F9/00806

  Correction of higher orders · CPC title

• A61F2009/00851

  Optical coherence topography [OCT] · CPC title