IP Library › Granted Patent US 12,440,102
Granted Patent B2
US 12,440,102 · App. 19/094,328 · Granted Oct 14, 2025

Systems and methods for analyzing the eye

Inventors: John S. Berestka (Minneapolis, MN); Jan Bonel (Gava, ES); Charilaos Gkinis (Megara, GR); Dimitrios Christaras (Athens, GR); Alexandros Pennos (Larisa, GR); Spyridon Tsoukalas (Athens, GR); Matthew Berestka (Minneapolis, MN)
Assignee: Lightfield Medical Inc.
A61B3/145A61B3/0083A61B3/107
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Quick Facts
Patent No.
US 12,440,102
App. No.
19/094,328
Granted
Oct 14, 2025
Kind
B2
Abstract

Medical devices and methods of use are disclosed to exam an eye of a patient. A medical device may include a digital projector as part of an illumination system. A medical device may include one or more cameras as part of an observation system to capture reflected light from the eye. The observation system may include one or more adjustable optical systems. The digital projector may produce a slit of light to be projected onto the eye. The slit of light and the observation system may be focused at a plurality of focal depths within the eye.

Claims (33)

1. A medical device for imaging at least a portion of an eye of a patient, the medical device comprising:

an illumination system including a digital projector producing at least one image to illuminate the eye and a first adjustable optical assembly to project the at least one image towards the eye;

an observation system including a second adjustable optical assembly positioned to receive imaging rays produced by reflection of light from the eye of the patient due to the projection of the at least one image towards the eye by the illumination system and a first camera configured receive the imaging rays from the second adjustable optical assembly, the illumination system and the observation system being positioned in a first spatial configuration with an optical axis of the first adjustable optical assembly and an optical axis of the second optical assembly intersecting at an apex of a cornea of the eye; and

a controller operatively coupled to the illumination system and to the observation system, the controller configured to adjust the first adjustable optical assembly of the illumination system and the second adjustable optical system of the observation system to a plurality of focal depths relative to the eye while the illumination system and observation system are in the first spatial configuration.

2. The medical device of claim 1 , wherein the at least one image includes a test pattern.

3. The medical device of claim 2 , wherein the test pattern includes a vertical slit and in a first image of the at least one image the vertical slit is in a first transverse position and in a second image of the at least one image the vertical slit is in a second transverse position, the second traverse position in second image of the at least one image being spaced apart from the first transverse position in the first image.

4. The medical device of claim 3 , wherein the controller focuses the first adjustable optical assembly of the illumination system at a first focal depth of the plurality of focal depths when the first image of the at least one image is produced by the digital projector to focus the vertical slit in the first transverse position on the cornea at a first location offset from the apex of the cornea and focuses the first adjustable optical assembly of the illumination system at a second focal depth of the plurality of focal depths when the second image of the at least one image is produced by the digital projector to focus the vertical slit in the second transverse position on the cornea at a second location offset from the apex of the cornea, the second location on the cornea being offset from the first location on the cornea.

5. The medical device of claim 4 , wherein the controller further focuses the second adjustable optical assembly of the observation system at the first focal depth of the plurality of focal depths when the first image of the at least one image is produced by the digital projector to focus the vertical slit in the first transverse position on the cornea at the first location offset from the apex of the cornea and focuses the second adjustable optical assembly of the observation system at the second focal depth of the plurality of focal depths when the second image of the at least one image is produced by the digital projector to focus the vertical slit in the second transverse position on the cornea at the second location offset from the apex of the cornea.

6. The medical device of claim 3 , wherein the controller is configured to adjust the first adjustable optical assembly of the illumination system and the second adjustable optical system of the observation system to a plurality of focal depths relative to the apex of the cornea while the illumination system and observation system are in the first spatial configuration, wherein a first subset of the plurality of focal depths are part of a first contour and a second subset of the plurality of focal depths are part of a second contour, the second contour being offset relative to the first contour, and wherein the digital projector produces the first image having the vertical slit in the first transverse position for a first focal depth of the first subset of the plurality of focal depths of the first contour and a first focal depth of second subset of the plurality of focal depths of the second contour and the digital projector produces the second image having the vertical slit in the second transverse position for a second focal depth of the first subset of the plurality of focal depths and a second focal depth of second subset of the plurality of focal depths.

7. The medical device of claim 6 , wherein the first contour has a first shape and the second contour has a second shape, the second shape being different than the first shape.

8. The medical device of claim 7 , wherein the second shape is flatter than the first shape.

9. The medical device of claim 1 , wherein the first adjustable optical assembly of the illumination system includes a first tunable lens.

10. The medical device of claim 1 , wherein the second adjustable optical assembly of the observation system includes a second tunable lens.

11. The medical device of claim 2 , wherein the test pattern has a first color value in a first image and a second color value in a second image, the second color value being different from the first color value.

12. The medical device of claim 2 , wherein the test pattern further includes one or more of a time stamp, a patient name, an indication of nasal and temporal sides of a projected image.

13. The medical device of claim 2 , wherein the test pattern further includes a watermark.

14. The medical device of claim 2 , wherein the test pattern includes multiple slits including a first slit and a second slit spaced apart from the first slit.

15. The medical device of claim 1 , wherein the controller is further configured to determine a movement of the eye during an examination.

16. The medical device of claim 15 , wherein the controller based on images captured by the observation system determines the movement of the eye during an examination.

17. The medical device of claim 15 , wherein the controller is further configured to determine a direction and a magnitude of the movement of the eye and adjust the first adjustable optical assembly of the illumination system and the second adjustable optical system of the observation system.

18. The medical device of claim 1 , wherein the controller is further configured to determine a blink of the eye during an examination.

19. The medical device of claim 1 , further comprising a base, the illumination system being coupled to the base and the observation system being coupled to the base.

20. The medical device of claim 19 , wherein the illumination system is movable relative to the base.

21. The medical device of claim 19 , wherein the illumination system is movable relative to the observation system.

22. The medical device of claim 21 , wherein the illumination system is rotatable relative to the base about a first rotation axis.

23. The medical device of claim 22 , wherein the illumination system includes an illumination system support arm supporting the at least one source.

24. The medical device of claim 22 , wherein the observation system is rotatable relative to the base about the first rotation axis.

25. The medical device of claim 24 , wherein the observation system includes an observation system support arm supporting the first camera.

26. The medical device of claim 21 , further comprising a patient support adapted to position the eye of the patient, wherein

the base is a movable base moveable relative to the patient support,

the illumination system further includes an illumination system support arm supporting the at least one source, the illumination system support arm being supported by the moveable base and rotatable relative to the moveable base, and

the observation system further includes an observation system support arm supporting the first camera, the observation system support arm being supported by the moveable base and rotatable relative to the moveable base and rotatable relative to the illumination system support arm.

27. The medical device of claim 19 , further comprising a patient support adapted to position the eye of the patient, and wherein the base is a movable base movable relative to the patient support.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 31, 2025
From: BERESTKA, JOHN S.; BONEL, JAN; BERESTKA, MATTHEW
To: LIGHTFIELD MEDICAL INC.
Reel/Frame 070686/0490 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 31, 2025
From: GKINIS, CHARILAOS; CHRISTARAS, DIMITRIOS; PENNOS, ALEXANDROS; TSOUKALAS, SPYRIDON
To: DIESTIA SYSTEMS
Reel/Frame 070686/0559 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 31, 2025
From: DIESTIA SYSTEMS
To: LIGHTFIELD MEDICAL INC.
Reel/Frame 070686/0575 →
Continuity (3)
Continuation PCTUS2024054811 · Nov 6, 2024
Provisional Application 63547628 · Nov 7, 2023
Related Publication 20250221622A1 · Jul 10, 2025
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