Wavefront measurement pre-smoothing systems and methods

Patent metadata

Field	Value
Publication number	US-9655513-B2
Application number	US-201414579782-A
Country	US
Kind code	B2
Filing date	Dec 22, 2014
Priority date	Dec 31, 2013
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

Embodiments of the present invention encompass systems and methods for generating a vision treatment target for an eye of a patient. Exemplary techniques can involve obtaining a wavefront measurement for the eye of the patient, processing the wavefront measurement, using a low pass filter, to obtain an ocular wavefront, and generating the vision treatment target based on the ocular wavefront. In some cases, the wavefront is processed by applying a Fourier transform to the wavefront measurement to obtain a Fourier spectrum of the wavefront, convolving, in the Fourier domain, the Fourier spectrum of the wavefront and the low pass filter to obtain a Fourier spectrum convolution result, and applying an inverse transform to the convolution result to obtain the ocular wavefront. The ocular wavefront can represent a low pass filtered version of the wavefront measurement, such that high spatial frequency features present in the wavefront measurement are not present in the ocular wavefront.

First claim

What is claimed is:

1. A method of generating a vision treatment target for an eye of a patient, comprising:
receiving, at a processor, a wavefront measurement for the eye of the patient;
executing, on the processor, computer executable code stored on a non-transitory computer readable medium, the computer executable code comprising instructions that when executed on the processor cause the processor to process the wavefront measurement, using a low pass filter, to obtain an ocular wavefront; and
generating the vision treatment target based on the ocular wavefront.

2. The method according to claim 1 , wherein the instructions that cause the processor to process the wavefront measurement comprise instructions that when executed on the processor cause the processor to:
apply a Fourier transform to the wavefront measurement to obtain a Fourier spectrum of the wavefront;
convolve, in the Fourier domain, the Fourier spectrum of the wavefront and the low pass filter to obtain a Fourier spectrum convolution result; and
apply an inverse transform to the convolution result to obtain the ocular wavefront,
wherein the ocular wavefront represents a low pass filtered version of the wavefront measurement, such that high spatial frequency features present in the wavefront measurement are not present in the ocular wavefront.

3. The method according to claim 2 , wherein the low pass filter is a Gaussian low-pass filter having a kernel size of 0.3 mm.

4. The method according to claim 1 , further comprising administering the vision treatment target to the eye of the patient.

5. The method according to claim 1 , further comprising processing the treatment target with a deconvolution protocol to obtain a deconvolved treatment target.

6. The method according to claim 5 , further comprising administering the deconvolved treatment target to the eye of the patient.

7. A system for generating a vision treatment target for an eye of a patient, comprising:
a processor;
a first module comprising a tangible medium embodying machine-readable code executed on the processor to obtain a wavefront measurement for the eye of the patient;
a second module comprising a tangible medium embodying machine-readable code executed on the processor to process the wavefront measurement with a low pass filter to obtain an ocular wavefront; and
a third module comprising a tangible medium embodying machine-readable code executed on the processor to generate the vision treatment target based on the ocular wavefront.

8. The system according to claim 7 , wherein the tangible medium embodying machine-readable code of the second module, when executed on the processor, applies a Fourier transform to the wavefront measurement to obtain a Fourier spectrum of the wavefront, convolves, in the Fourier domain, the Fourier spectrum of the wavefront and the low pass filter to obtain a Fourier spectrum convolution result, and applies an inverse transform to the convolution result to obtain the ocular wavefront, and
wherein the ocular wavefront represents a low pass filtered version of the wavefront measurement, such that high spatial frequency features present in the wavefront measurement are not present in the ocular wavefront.

9. The system according to claim 8 , wherein the low pass filter is a Gaussian low-pass filter having a kernel size of 0.3 mm.

10. The system according to claim 7 , further comprising a fourth module comprising a tangible medium embodying machine-readable code executed on the processor to administer the vision treatment target to the eye of the patient.

11. The system according to claim 7 , further comprising a fourth module comprising a tangible medium embodying machine-readable code executed on the processor to process the treatment target with a deconvolution protocol to obtain a deconvolved treatment target.

12. The system according to claim 11 , further comprising a fifth module comprising a tangible medium embodying machine-readable code executed on the processor to administer the deconvolved treatment target to the eye of the patient.

13. A computer product embodied on a tangible computer readable storage medium, comprising:
code for obtaining a wavefront measurement for the eye of the patient;
code for processing the wavefront measurement, using a low pass filter, to obtain an ocular wavefront; and
code for generating the vision treatment target based on the ocular wavefront.

14. The computer product according to claim 13 , wherein the code for processing the wavefront measurement comprises:
code for applying a Fourier transform to the wavefront measurement to obtain a Fourier spectrum of the wavefront;
code for convolving, in the Fourier domain, the Fourier spectrum of the wavefront and the low pass filter to obtain a Fourier spectrum convolution result; and
code for applying an inverse transform to the convolution result to obtain the ocular wavefront,
wherein the ocular wavefront represents a low pass filtered version of the wavefront measurement, such that high spatial frequency features present in the wavefront measurement are not present in the ocular wavefront.

15. The computer product according to claim 14 , wherein the low pass filter is a Gaussian low-pass filter having a kernel size of 0.3 mm.

16. The computer product according to claim 13 , further comprising code for administering the vision treatment target to the eye of the patient.

17. The computer product according to claim 13 , further comprising code for processing the treatment target with a deconvolution protocol to obtain a deconvolved treatment target.

18. The computer product according to claim 17 , further comprising code for administering the deconvolved treatment target to the eye of the patient.

Assignees

• Amo Dev Llc

Inventors

• Fabrikant Anatoly
• Chernyak Dimitri
• Dai Guang-Ming
• Shah Jayesh

Classifications

• A61F2009/00872

  Cornea · CPC title

• A61F9/00804 Primary

  Refractive treatments · CPC title

• A61F2009/0087

  Lens · CPC title

• A61F9/00827

  Refractive correction, e.g. lenticle · CPC title

• A61B3/1015 Primary

  for wavefront analysis · CPC title