WAVEFRONT GENERATION FOR OPHTHALMIC APPLICATIONS

• US 20140313484A1
• Filed: 03/10/2014
• Published: 10/23/2014
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Amo Groningen B.V (Johnson & Johnson)
• Original Assignee: Amo Groningen B.V (Johnson & Johnson)
• Inventors: Bogaert, Theophilus
• Granted Patent: US 9,510,748 B2
• Time in Patent Office: Days
• US Class Current: 351/211
• CPC Class Codes: A61B 3/0025 characterised by electronic signal processing, e.g. eye models
• CPC Class Codes: A61B 3/0041 characterised by display arrangements
• CPC Class Codes: A61B 3/028 for testing visual acuity; for determination of refraction, e.g. phoropters
• CPC Class Codes: A61B 3/1015 for wavefront analysis
• CPC Class Codes: A61F 2009/0088 based on wavefront
• CPC Class Codes: A61F 9/008 using laser
• CPC Class Codes: G02B 2027/011 comprising device for correcting geometrical aberrations, distortion
• CPC Class Codes: G02B 2027/0138 comprising image capture systems, e.g. camera
• CPC Class Codes: G02B 2027/014 comprising information/image processing systems
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02C 2202/10 Optical elements and systems for visual disorders other than refractive errors, low vision

Abstract

Embodiments of this invention relate to the generation of wavefronts for measurements, diagnostics, and treatment planning for ophthalmic applications. In some embodiments, a wavefront generator generates light having a uniform wavefront, which is focusable on the retina of an emmetropic eye by the normal function of the emmetropic eye. In some embodiments, the wavefront generator can generate light having a custom wavefront which is not focusable on the retina of the emmetropic eye. In some embodiments, the wavefront generator can receive information relating to an optical aberration of the eye, generate a custom wavefront, and project light having this custom wavefront, which in combination with the optical aberration of the eye is focusable on the retina.

Claims

1. A method of projecting a desired image, the method comprising:

receiving data identifying an optical aberration in a user'"'"'s eye;

calculating a custom wavefront based on the data identifying the optical aberration in the user'"'"'s eye;

calculating a modified version of the image using the desired image and the custom wavefront;

displaying the modified image on a display device; and

projecting the modified image from the display device, through a lenslet array, and toward the eye, wherein the calculated modification of the image compensates for the custom wavefront so that the optical aberration of the user'"'"'s eye alters the projected image from the modified image toward the desired image.

2. The method of claim 1, further comprising measuring the optical aberration in the user'"'"'s eye.

3. The method of claim 2, wherein the optical aberration in the user'"'"'s eye is measured with a Shack-Hartmann analyzer.

4. The method of claim 1, wherein the custom wavefront in combination with the optical aberration of the user'"'"'s eye causes the projection of the image to focus on the retina of the user'"'"'s eye.

5. The method of claim 4, wherein the projection of the image focuses on the retina of the user'"'"'s eye when the display device is a specified distance and angle from the user'"'"'s eye.

6. The method of claim 5 further comprising:

measuring the distance between the user'"'"'s eye and the display device; and

adjusting the custom wavefront so that the specified distance between the user'"'"'s eye and the display device is the measured distance between the user'"'"'s eye and the display device.

7. The method of claim 6 further comprising:

measuring the angle between the user'"'"'s eye and the display device; and

adjusting the custom wavefront so that the specified angle between the user'"'"'s eye and the display device is the measured angle between the user'"'"'s eye and the display device.

8. The method of claim 1, further comprising receiving image data for projection.

9. The method of claim 8, wherein the image data is generated by a user controlled camera.

10. The method of claim 9, wherein the image data comprises at least one of a landscape and a text string.

11. A display system comprising:

a manipulable display configurable to produce a modified image;

a lenslet array in a projection path from the manipulable display so that the modified image is projected by the lenslet array from the manipulable display toward a location for viewing with the user'"'"'s eye; and

a processor configured;

to receive an indicator defining an optical aberration of the user'"'"'s eye; and

to control the manipulable display so that the modified image of the manipulable display is modified from a desired image per the optical aberration of the user'"'"'s eye so that the optical aberrations of the user'"'"'s eye alter the modified image toward the desired image.

12. The display system of claim 11, wherein the modified image is modified from the desired image in response to characteristics of the lenslet array, wherein the desired image comprises a complex image so that a plurality of lenslets of the array each project an associated two-dimensional modified image portion.

13. The display system of claim 11, further comprising memory comprising an indicator corresponding to the optical aberration of the user'"'"'s eye and of the custom wavefront.

14. The display system of claim 11, further comprising an input feature configured to receive the indicator defining the optical aberration of the user'"'"'s eye and to provide the indicator defining the optical aberration of the user'"'"'s eye to the processor.

15. The display system of claim 13, wherein the input feature comprises a user interface.

16. The display system of claim 14, wherein the user interface comprises a keyboard.

17. The display system of claim 14, wherein the user interface comprises a seamier.

18. The display system of claim 16, wherein the scanner comprises a Shack-Hartmann analyzer.

19. The display system of claim 13, wherein the input feature comprises a communication feature.

20. The display system of claim 18, wherein the communication feature is configured to receive the indicator defining the optical aberration of the user'"'"'s eye from a medical record.

21. The display system of claim 11, wherein the processor controls the manipulable display so that the manipulable display and lenslet array project the image having the custom wavefront, wherein the custom wavefront corresponds to the optical aberration of the user'"'"'s eye when the manipulable display is a specified distance from and at a specified angle relative to the user'"'"'s eye.

22. The display system of claim 20, further comprises a sensor configured to sense the distance between the manipulable display and the user'"'"'s eye, and wherein the processor is configured to receive the sensed distance and adjust the custom wavefront so that the sensed distance matches the specified distance.

23. The display system of claim 21, further comprises a sensor configured to sense the angle between the manipulable display and the user'"'"'s eye, and wherein the processor is configured to receive the sensed angle and adjust the custom wavefront so that the sensed angle matches the specified angle.

24. A method of simulating benefits of a vision correction, the method comprising:

generating optical aberration data for an eye of a patient;

generating a custom wavefront solution, wherein the custom wavefront solution represents a custom wavefront which in combination with the optical aberration of the patient'"'"'s eye causes light to focus on the retina of the patient'"'"'s eye to the same extent as light is expected to focus on the patient'"'"'s retina after performing a corrective eye procedure;

calculating a modified version of an image using the desired image and the custom wavefront;

displaying the modified image on a display device;

projecting the modified image from the display device, through a lenslet array, and toward the eye, wherein the calculated modification of the image compensates for the custom wavefront so that the optical aberration of the user'"'"'s eye alters the projected image from the modified image toward the desired image and thereby simulates corrected eyesight; and

performing the corrective procedure on the patient'"'"'s eye.

25. The method of claim 24, wherein the light is projected onto the patient'"'"'s eye with a Shack-Hartmann projector.

26. The method of claim 24, wherein the custom wavefront corrects for at least one of:

myopia, hyperopia, and astigmatism.

27. A method of limiting the effects of macular degeneration, the method comprising:

determining the location of unhealthy regions of the retina of a patient'"'"'s eye;

determining the location of healthy regions of the retina of the patient'"'"'s eye;

generating optical aberration data for the patient'"'"'s eye;

generating a custom wavefront solution, wherein the custom wavefront solution represents a custom wavefront which in combination with the optical aberration of the patient'"'"'s eye causes an image to focus on the retina of the patient'"'"'s eye;

calculating a modified version of an image using the desired image and the custom wavefront solution;

calculating a deformed version of the modified version of the image, wherein the deformations correspond to the location of the healthy and unhealthy regions of the patient'"'"'s eye such that the image is projectable onto only the healthy portions of the retina; and

projecting the deformed version of the image from a display device, through a lenslet array, and toward the healthy portions of the retina.

28. The method of claim 27, wherein the unhealthy portions of the retina of the patient'"'"'s eye comprise portions of the retina affected by macular degeneration.

29. The method of claim 28, wherein the macular degeneration is age related macular degeneration.

30. The method of claim 27, further comprising determining the orientation of the patient'"'"'s eye relative to the display device.

31. The method of claim 30, wherein determining the orientation of the patient'"'"'s eye comprises scanning the patient'"'"'s eye and identifying a reference feature of the eye.

32. The method of claim 30, further comprising orienting the projected deformed image relative to the patient'"'"'s eye so that the image is projected onto only the healthy regions of the retina.

33. The method of claim 27, further comprising receiving an indicator of a magnification level.

34. The method of claim 33, further comprising magnifying the image according to the received indicator of a magnification level.