FUNCTIONAL VISION TESTING USING LIGHT FIELD DISPLAYS

• US 20170055825A1
• Filed: 04/20/2015
• Published: 03/02/2017
• Est. Priority Date: 04/24/2014
• Status: Active Grant

• Current Assignee: Carl Zeiss Meditec Incorporated (Carl-Zeiss-Stiftung)
• Original Assignee: Carl Zeiss Meditec Incorporated (Carl-Zeiss-Stiftung)
• Inventors: TUMLINSON, Alexandre R.
• Granted Patent: US 9,895,057 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 3/0008 provided with illuminating means A61B3/117 takes precedence; goniolenses used for laser treatment A61F9/009; illuminating means for optical instruments G02B27/00
• 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 3/0075 provided with adjusting devices, e.g. operated by control lever manipulators B25J
• CPC Class Codes: A61B 3/024 for determining the visual field, e.g. perimeter types
• CPC Class Codes: A61B 3/032 Devices for presenting test symbols or characters, e.g. test chart projectors A61B3/036 takes precedence

Abstract

Systems and methods for performing visual field testing using light field displays are described. The light field display (201, 202; 801; 504; 601-604; 704; 801), that can correct for the focus and cylindrical refractive error of the subject, can be used to perform a variety of visual field testing strategies by rendering visual stimuli to the eye (203). The light field display may be included near the subject'"'"'s eye, or reimaged by a relay optical system (802). Several embodiments of head and arm mounted systems (711; 704) including a near eye light field display (704) are presented.

Claims

1. A method for testing the visual sensitivity of an eye of a subject, comprising:

displaying a plurality of visual stimuli to different locations of the eye of the subject, said stimuli generated using a light field display;

recording the response of the subject to the stimuli;

processing the responses to determine the subject'"'"'s visual sensitivity at different locations in the eye.

2. A method as recited in claim 1, wherein the light field display accounts for the refractive error of the eye in generating the visual stimuli.

3. A method as recited in claim 2, wherein the refractive error is focus.

4. A method as recited in claim 2, where the refractive error is spherical or cylindrical.

5. A method as recited in claim 1, wherein the stimuli are part of a standard automated perimetry test.

6. A method as recited in claim 1, further comprising performing a second type of vision testing using the light field display.

7. A method as recited in claim 1, wherein the stimuli are displayed in the central field of vision of the subject and further comprising controlling the illumination in the periphery.

8. A methods as recited in claim 7, wherein the illumination in the periphery is controlled using a second light field display or a non-stimulus producing homogenous illumination control.

9. A method as recited in claim 1, further comprising recording an image of the subject'"'"'s eye during the test and using the images to do one of:

adjust the position of a stimulus, delay the presentation of a stimulus, or adjust the test results.

11. A method as recited in claim 1, further comprising presenting auditory information to the subject during the test.

12. A method as recited in claim 1, wherein the response of the subject is recorded using a button click or a microphone.

13. A method as recited in claim 1, wherein the displaying, recording and processing steps are carried out on both eyes in a binocular arrangement.

10. (canceled)

14. A device for testing the visual sensitivity of an eye of a subject comprising:

a light field display for generating a plurality of visual stimuli presented to different locations of the eye of the subject;

a feedback collection detector for recording the response of the subject to the stimuli presentations; and

a processor for analyzing the responses from the feedback collection detector to map the visual sensitivity of the subject at different locations in the eye.

15. A device as recited in claim 14, wherein the light field display comprises an active source display coupled to a passive beam steering array.

16. A device as recited in claim 15, wherein the active source display is an organic light emitting diode (OLED) array.

17. A device as recited in claim 15, wherein the passive beam steering array is a lenslet array.

18. A device as recited in claim 15, wherein the generated visual stimuli account for the refractive error of the eye.

19. A devices as recited in claim 14, further comprising an imaging system for recording images of the subject'"'"'s eye during the testing.

20. A device as recited in claim 14, wherein the device is mounted to the subject'"'"'s head.

21. A device as recited in claim 14, wherein the device is mounted to an adjustable arm for positioning relative to the subject'"'"'s eye.

22. A device as recited in claim 14, wherein the stimuli are generated to account for the refractive error of the patient.

23. A device as recited in claim 14, wherein the visual stimuli are presented to the central region of the subject'"'"'s field of view.

24. A device as recited in claim 23, further comprising a second light field display for controlling the illumination in the periphery of the visual field during the testing.

25. A device as recited in claim 23, further comprising a light pipe for controlling the illumination in the periphery of the visual field during the testing.

26. A device as recited in claim 14, further comprising a second light field display for generating a plurality of visual stimuli presented to different locations on the second eye of the subject in a binocular arrangement.