Eye measurement and modeling techniques

• US 20110208172A1
• Filed: 02/25/2011
• Published: 08/25/2011
• Est. Priority Date: 08/28/2008
• Status: Abandoned Application

• Current Assignee: Anton Hilger, Birgit Lutzenberger, Gerhard Youssefi, Julia Hoff
• Original Assignee: Anton Hilger, Birgit Lutzenberger, Gerhard Youssefi, Julia Hoff
• Inventors: Hoff, Julia, Hilger, Anton, Lutzenberger, Birgit, Youssefi, Gerhard
• Application Number:
  US13/035,174
• Publication Number:
  US 20110208172A1
• Time in Patent Office: Days
• US Class Current: 606/5
• CPC Class Codes: A61B 3/102 for optical coherence tomography [OCT]
• CPC Class Codes: A61F 2009/00844 Feedback systems
• CPC Class Codes: A61F 2009/00872 Cornea
• CPC Class Codes: A61F 2009/0088 based on wavefront
• CPC Class Codes: A61F 9/00804 Refractive treatments
• CPC Class Codes: A61F 9/00827 Refractive correction, e.g. lenticle

Abstract

A refractive surgical system, comprising a refractive treatment apparatus adapted to alter multiple localized regions of a cornea and an ophthalmic measurement device adapted to measure a corneal shape parameter at at least two locations on the cornea. A corneal modeling apparatus and method to calculate anticipated corneal shape parameters at two or more locations based on parameters of a refractive treatment, and compare shape parameters measured at two or more locations on the cornea corresponding to the two or more locations of the anticipated corneal shape parameters.

Claims

1. A refractive surgical system, comprising:

a refractive treatment apparatus adapted to alter multiple regions of a cornea; and

an ophthalmic measurement device adapted to measure corneal shape parameters at at least two locations on the cornea affected by the treatment apparatus.

2. The system of claim 1, wherein the measurement device comprises a Fourier domain OCT device.

3. The system of claim 1, wherein the treatment apparatus comprises a laser.

4. The system of claim 3, wherein the laser comprises one of an excimer laser and a femtosecond laser.

5. The system of claim 3, wherein the system is adapted to modify a fluence of the laser in response to the measured corneal shape parameters.

7. The system of claim 1, wherein the corneal shape parameters are corneal positions.

8. The system of claim 1, wherein the at least two locations span at least 2 millimeters.

9. The system of claim 1, wherein the measurement device comprises a moveable time-domain OCT device.

10. The system of claim 1, further comprising a processor adapted to A) calculate anticipated corneal shape parameters at the two or more locations based on parameters of a refractive treatment, and B) compare the shape parameters measured at the two or more locations to the anticipated corneal shape parameters.

11. The apparatus of claim 10, wherein the system is adapted to modify a fluence of the laser in response to a difference between the measured shape parameters measured and the anticipated corneal shape parameters.

12. The apparatus of claim 11, wherein the system is adapted to notify an operator of the system if a difference between the measured shape parameters measured and the anticipated corneal shape parameters is too great.

6. The system of claim I, wherein the corneal shape parameters are thicknesses of the cornea.

13. A corneal modeling apparatus comprising a processor adapted to A) calculate anticipated corneal shape parameters at two or more locations based on parameters of a refractive treatment, and B) compare shape parameters measured at two or more locations on a cornea to the anticipated corneal shape parameters, the two or more locations on the cornea corresponding to the two or more locations of the anticipated corneal shape parameters.

14. The apparatus of claim 13, further comprising a refractive treatment apparatus adapted to perform the refractive treatment on the cornea.

15. The apparatus of claim 14, further comprising an ophthalmic measurement device adapted to obtain the two or more measured shape parameters.

16. The apparatus of claim 15, wherein the measurement device comprises a Fourier domain OCT device.

17. The apparatus of claim 14, wherein the treatment apparatus comprises a laser.

18. The apparatus of claim 17, wherein the laser comprises an excimer laser and a femtosecond laser.

19. The apparatus of claim 17, wherein the system is adapted to modify a fluence of the laser in response to a difference between the measured shape parameters measured and the anticipated corneal shape parameters.

20. The apparatus of claim 19, wherein the system is adapted to notify an operator of the system if a difference between the measured shape parameters measured and the anticipated corneal shape parameters is too great.

21. The apparatus of claim 13, wherein the corneal shape parameters are thicknesses of the cornea.

22. The apparatus of claim 13, wherein the corneal shape parameters are corneal positions.

23. The apparatus of claim 13, wherein the at least two locations span at least 2 millimeters.

24. A corneal modeling method comprising:

calculating anticipated corneal shape parameters at two or more locations based on parameters of a refractive treatment; and

comparing shape parameters measured at two or more locations on a cornea to the anticipated corneal shape parameters, the two or more locations on the cornea corresponding to the two or more locations of the anticipated corneal shape parameters.

25. The method of claim 24, further comprising a refractive treatment apparatus adapted to perform the refractive treatment on the cornea.

26. The method of claim 25, further comprising an ophthalmic measurement device adapted to obtain the two or more measured shape parameters.

27. The method of claim 26, wherein the measurement device comprises a Fourier domain OCT device.

28. The method of claim 25, wherein the treatment apparatus comprises a laser.

29. The method of claim 28, wherein the laser comprises an excimer laser and a femtosecond laser.

30. The method of claim 28, wherein the system is adapted to modify a fluence of the laser in response to a difference between the measured shape parameters measured and the anticipated corneal shape parameters.

31. The method of claim 30, wherein the system is adapted to notify an operator of the system if a difference between the measured shape parameters measured and the anticipated corneal shape parameters is too great.

32. The method of claim 24, wherein the corneal shape parameters are thicknesses of the cornea.

33. The method of claim 24, wherein the corneal shape parameters are corneal positions.

34. The method of claim 24, wherein the at least two locations span at least 2 millimeters.

35. One or more processor readable storage devices having processor readable code embodied on said processor storage devices, said processor readable code for programming one or more processors to execute a method for providing a corneal modeling, comprising:

calculating anticipated corneal shape parameters at two or more locations based on parameters of a refractive treatment; and

comparing shape parameters measured at two or more locations on a cornea to the anticipated corneal shape parameters, the two or more locations on the cornea corresponding to the two or more locations of the anticipated corneal shape parameters.

36. The processor readable storage device of claim 35, further comprising a refractive treatment apparatus adapted to perform the refractive treatment on the cornea.

37. The processor readable storage device of claim 36, further comprising an ophthalmic measurement device adapted to obtain the two or more measured shape parameters.

38. The processor readable storage device of claim 37, wherein the measurement device comprises a Fourier domain OCT device.

39. The processor readable storage device of claim 36, wherein the treatment apparatus comprises a laser.

40. The processor readable storage device of claim 39, wherein the laser comprises an excimer laser and a femtosecond laser.

41. The processor readable storage device of claim 39, wherein the system is adapted to modify a fluence of the laser in response to a difference between the measured shape parameters measured and the anticipated corneal shape parameters.

42. The processor readable storage device of claim 40, wherein the system is adapted to notify an operator of the system if a difference between the measured shape parameters measured and the anticipated corneal shape parameters is too great.

43. The processor readable storage device of claim 35, wherein the corneal shape parameters are thicknesses of the cornea.

44. The processor readable storage device of claim 35, wherein the corneal shape parameters are corneal positions.

45. The processor readable storage device of claim 35, wherein the at least two locations span at least 2 millimeters.