PLACIDO RING MEASUREMENT OF ASTIGMATISM AXIS AND LASER MARKING OF ASTIGMATISM AXIS

• US 20110190740A1
• Filed: 01/31/2011
• Published: 08/04/2011
• Est. Priority Date: 02/01/2010
• Status: Abandoned Application

• Current Assignee: LensAR, Inc. (PDL BioPharma, Inc.)
• Original Assignee: LensAR, Inc. (PDL BioPharma, Inc.)
• Inventors: Frey, Rudolph W., Bott, Steven E.
• Application Number:
  US13/017,499
• Publication Number:
  US 20110190740A1
• Time in Patent Office: Days
• US Class Current: 606/5
• CPC Class Codes: A61F 2009/0087 Lens
• CPC Class Codes: A61F 2009/00872 Cornea
• CPC Class Codes: A61F 2009/00889 Capsulotomy
• CPC Class Codes: A61F 9/00825 for photodisruption
• CPC Class Codes: A61F 9/00827 Refractive correction, e.g. lenticle

Abstract

A laser treatment system that includes means for measuring an astigmatism axis of a cornea of an eye of a patient and means for applying a laser beam to the eye.

Claims

1. A laser system comprising:

means for measuring an astigmatism axis of a cornea of an eye of a patient; and

means for applying a laser beam to said eye after said means for measuring has measured said astigmatism axis.

2. The laser system of claim 1, wherein said means for applying a laser beam to said eye treats said eye.

3. The laser system of claim 1, wherein said means for applying a laser beam to said eye marks said eye so as to identify said astigmatism axis.

4. An astigmatism axis measurement system comprising:

means for directing light toward a cornea of an eye of an eye of a patient; and

means for measuring an astigmatism axis of said cornea based on light reflected off of said cornea.

5. An astigmatism axis measurement system comprising:

means for measuring an astigmatism axis of a cornea of an eye of a patient; and

means for determining an apex of said cornea.

6. An astigmatism axis measurement system comprising:

an annular source generating a light beam directed toward a cornea of an eye of a patient;

a detector for receiving light reflected from said cornea;

a processor for receiving signals from said detector and determining an astigmatism axis of said cornea.

7. The system of claim 6, further comprising a second detector that receives further light reflected from said cornea and determines an apex of said cornea.

8. A method of identifying an astigmatism axis of a cornea or an eye of a patient, the method comprising:

directing annular light beams toward a cornea of an eye of a patient;

receiving light reflected from said cornea; and

determining an astigmatism axis of said cornea based on said received light.

9. The method of claim 8, further comprising marking said eye with a laser beam so as to form a tag on said eye that identifies said astigmatism axis.

10. A method of marking an eye as to where an astigmatism axis of a cornea exists, the method comprising:

determining an astigmatism axis of said cornea; and

marking said eye with a laser beam so as to form a tag on said eye that identifies said astigmatism axis.

11. A laser treatment system comprising:

means for generating light beams directed toward a cornea of an eye of a patient;

means for receiving light reflected from said cornea;

means for determining a shape of said cornea based on said received light; and

means for applying a laser beam to said eye after said means for determining said shape of said cornea has determined said shape of said cornea.

12. A laser treatment system comprising:

multiple annular sources generating light beams directed toward a cornea of an eye of a patient;

a detector for receiving light reflected from said cornea;

a processor for receiving signals from said detector and determining a shape of said cornea based on said received light; and

a laser that applies a laser beam to said eye based on said shape of said cornea determined by said processor.

13. A method of measuring a corneal shape comprising:

generating light beams directed toward a cornea of an eye of a patient;

receiving light reflected from said cornea;

determining a shape of said cornea based on said received light; and

applying a laser beam to said eye based on said determined shape of said cornea.