Apparatus and method for operating a real time large dipoter range sequential wavefront sensor

• US 9,101,292 B2
• Filed: 11/06/2013
• Issued: 08/11/2015
• Est. Priority Date: 01/20/2006
• Status: Expired due to Fees

• Current Assignee: Clarity Medical Systems, Inc.
• Original Assignee: Clarity Medical Systems, Inc.
• Inventors: Zhou, Yan, Chew, Bradford, Shea, William
• Primary Examiner(s): MAI, HUY KIM
• Application Number:
  US14/073,775
• Publication Number:
  US 20140063455A1
• Time in Patent Office: 643 Days
• Field of Search: 351/205, 351/209, 351/210, 351/212, 351/246, 351/206
• US Class Current: 1/1
• CPC Class Codes: A61B 3/1015 for wavefront analysis
• CPC Class Codes: A61B 3/102 for optical coherence tomography [OCT]
• CPC Class Codes: A61B 3/112 for measuring diameter of pupils
• CPC Class Codes: G01J 2003/064 Use of other elements for scan, e.g. mirror, fixed grating
• CPC Class Codes: G01J 9/00 Measuring optical phase difference devices or arrangements for controlling the phase of light beams G02F1/01; Determining degree of coherence; Measuring optical wavelength spectrometry G01J3/00

Abstract

A wavefront sensor includes a wavefront scanning module configured to output wavefront tilt measurements of a wavefront beam returned from a subject eye, a biometric/anatomic measurement device configured to output biometric/anatomic measurements of the subject eye and a processing system, coupled to the scanning module and the biometric/anatomic measurement device, configured to process biometric/anatomic measurements output during a surgical procedure to determine eye status information and to concurrently output eye status information and wavefront tilt information during the surgical procedure.

Claims

1. A wavefront sensor comprising:

a wavefront scanning module configured to output wavefront tilt measurements of different sub-wavefronts of a wavefront beam returned from a subject eye, wherein a tilt measurement indicates the angular offset of the wavefront from a plane wavefront;

a biometric/anatomic measurement device configured to output biometric/anatomic measurements of the subject eye; and

a processing system, coupled to the wavefront scanning module and the biometric/anatomic measurement device, configured to process biometric/anatomic measurements output during a surgical procedure to determine eye status information and to concurrently output eye status information and wavefront tilt measurements during the surgical procedure.

2. The wavefront sensor of claim 1 where the biometric/anatomic measurements include one or more of measurements of axial eye distance, anterior chamber depth, cornea thickness, corneal refractive power and eye lens refractive power.

3. The wavefront sensor of claim 1 with the processing system further configured to process biometric/anatomic measurements to measure scattering and/or opacity of media in the subject eye.

4. The wavefront sensor of claim 3 configured to measure cataract opacity.

5. The wavefront sensor of claim 3 configured to detect the presence of optical bubbles.

6. The wavefront sensor of claim 1 where the biometric/anatomic measurement device is an optical coherence tomographer.

7. The wavefront sensor of claim 1 where the biometric/anatomic measurement device is a low optical coherence interferometer.

8. The wavefront sensor of claim 1 further comprising:

an image sensor configured to output an image of the subject eye; and

with the processing system further configured to process the image to determine transverse position movement of the subject eye.

9. The wavefront sensor of claim 1 further comprising:

an image sensor configured to output an image of the subject eye; and

with the processing system further configured to process the image to determine pupil size.

10. A wavefront sensor comprising:

a wavefront scanning module configured to sequentially output wavefront tilt measurements of different sub-wavefronts of a wavefront beam returned from a subject eye, wherein a tilt measurement indicates the angular offset of the sub-wavefront from a plane wavefront;

a biometric/anatomic measurement device configured to output biometric/anatomic measurements of the subject eye, with the biometric/anatomic measurement device including a beam directing element configured to scan an illumination beam across a portion of the subject eye; and

a processing system, coupled to the wavefront scanning module and the biometric/anatomic measurement device, with the processing system configured to control the beam directing to return reflections/scatterings of the illumination beam returned from a portion of the subject eye to the biometric/anatomic measurement device, configured to process biometric/anatomic measurements output during a surgical procedure to determine eye status information and configured to output eye status information and wavefront tilt measurements during the surgical procedure.

11. The wavefront sensor of claim 10 with the processing system further configured to control the beam directing element to scan the illumination beam across the cornea of the subject eye.

12. The wavefront sensor of claim 10 with the processing system further configured to control the beam directing element to scan the illumination beam across the lens (natural or artificial) of the subject eye.

13. The wavefront sensor of claim 10 with the processing system further configured to control the beam directing element to scan the illumination beam across the retina of the subject eye.

14. The wavefront sensor of claim 10 with the processing system further configured to sequentially or spectrally separate sub-wavefront tilt measurements from biometric/anatomic measurements to prevent biometric/anatomic reflections/scatterings from degrading sub-wavefront tilt measurement accuracy.