Methods and systems for performing slit lamp examination

• US 10,473,934 B2
• Filed: 09/19/2016
• Issued: 11/12/2019
• Est. Priority Date: 03/16/2015
• Status: Active Grant

• Current Assignee: Magic Leap, Inc.
• Original Assignee: Magic Leap, Inc.
• Inventors: Samec, Nicole Elizabeth, Macnamara, John Graham, Harrises, Christopher M., Schowengerdt, Brian T., Abovitz, Rony, Baerenrodt, Mark
• Primary Examiner(s): Wang, Jin Cheng
• Application Number:
  US15/269,609
• Publication Number:
  US 20170000340A1
• Time in Patent Office: 1,149 Days
• Field of Search: 351206, 351208, 351246, 600443, 600452, 345 8, 345633, 604294, 607 45, 607141
• CPC Class Codes: A61B 2562/0204 Acoustic sensors
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• 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 3/005 Constructional features of the display
• CPC Class Codes: A61B 3/022 for testing contrast sensitivity
• CPC Class Codes: A61B 3/024 for determining the visual field, e.g. perimeter types
• CPC Class Codes: A61B 3/028 for testing visual acuity; for determination of refraction, e.g. phoropters
• CPC Class Codes: A61B 3/0285 Phoropters
• CPC Class Codes: A61B 3/032 Devices for presenting test symbols or characters, e.g. test chart projectors A61B3/036 takes precedence
• CPC Class Codes: A61B 3/036 for testing astigmatism
• CPC Class Codes: A61B 3/063 for testing light sensitivity, i.e. adaptation
• CPC Class Codes: A61B 3/066 for testing colour vision
• CPC Class Codes: A61B 3/08 for testing binocular or stereoscopic vision, e.g. strabismus
• CPC Class Codes: A61B 3/085 for testing strabismus
• CPC Class Codes: A61B 3/10 Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
• CPC Class Codes: A61B 3/1005 for measuring distances inside the eye, e.g. thickness of the cornea A61B3/11 takes precedence
• CPC Class Codes: A61B 3/101 for examining the tear film
• CPC Class Codes: A61B 3/1015 for wavefront analysis
• CPC Class Codes: A61B 3/102 : for optical coherence tomography [OCT]
• CPC Class Codes: A61B 3/1035 : for measuring astigmatism testing astigmatism A61B3/036
• CPC Class Codes: A61B 3/113 : for determining or recording eye movement
• CPC Class Codes: A61B 3/12 : for looking at the eye fundus, e.g. ophthalmoscopes A61B3/13 takes precedence
• CPC Class Codes: A61B 3/1216 : for diagnostics of the iris
• CPC Class Codes: A61B 3/1241 : specially adapted for observation of ocular blood flow, e.g. by fluorescein angiography
• CPC Class Codes: A61B 3/13 : Ophthalmic microscopes
• CPC Class Codes: A61B 3/14 : Arrangements specially adapted for eye photography apparatus or arrangements for taking photographs per se G03B
• CPC Class Codes: A61B 3/165 : Non-contacting tonometers
• CPC Class Codes: A61B 5/0059 : using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• CPC Class Codes: A61B 5/0066 : Optical coherence imaging
• CPC Class Codes: A61B 5/0077 : Devices for viewing the surface of the body, e.g. camera, magnifying lens
• CPC Class Codes: A61B 5/01 : Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• CPC Class Codes: A61B 5/12 : Audiometering
• CPC Class Codes: A61B 5/14532 : for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1455 : using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/14555 : specially adapted for the eye fundus
• CPC Class Codes: A61B 5/361 : Detecting fibrillation
• CPC Class Codes: A61B 5/369 : Electroencephalography [EEG] devices for psychotechnics A61B5/16
• CPC Class Codes: A61B 5/398 : Electrooculography [EOG], e.g. detecting nystagmus; Electroretinography [ERG]
• CPC Class Codes: A61B 5/6803 : Head-worn items, e.g. helmets, masks, headphones or goggles
• CPC Class Codes: A61B 8/10 : Eye inspection
• CPC Class Codes: A61B 8/461 : Displaying means of special interest
• CPC Class Codes: A61F 2007/0004 : Eyes or part of the face surrounding the eyes
• CPC Class Codes: A61F 2007/004 : Hip
• CPC Class Codes: A61F 2009/00863 : Retina
• CPC Class Codes: A61F 9/0026 : Ophthalmic product dispenser attachments to facilitate positioning near the eye
• CPC Class Codes: A61H 2201/165 : Wearable interfaces
• CPC Class Codes: A61M 2021/0022 : by the tactile sense, e.g. vibrations
• CPC Class Codes: A61M 2021/0027 : by the hearing sense
• CPC Class Codes: A61M 2021/0066 : with heating or cooling
• CPC Class Codes: A61M 21/02 : for inducing sleep or relaxation, e.g. by direct nerve stimulation, hypnosis, analgesia for massage A61H; electrotherapy A61N, e.g. applying alternating or intermittent electric currents for producing anaesthesia A61N1/36021
• CPC Class Codes: A61M 2205/3375 : Acoustical, e.g. ultrasonic, measuring means
• CPC Class Codes: A61M 2205/507 : Head Mounted Displays [HMD]
• CPC Class Codes: A61N 2005/0648 : the light being directed to the eyes
• 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 2027/0185 : Displaying image at variable distance
• CPC Class Codes: G02B 21/0032 : Optical details of illumination, e.g. light-sources, pinholes, beam splitters, slits, fibers G02B21/0036 - G02B21/008; means for illumination of specimens in general G02B21/06
• CPC Class Codes: G02B 27/0093 : with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
• CPC Class Codes: G02B 27/0172 : characterised by optical features
• CPC Class Codes: G02B 27/0179 : Display position adjusting means not related to the information to be displayed
• CPC Class Codes: G02C 7/027 : considering wearer's parameters
• CPC Class Codes: G06T 19/006 : Mixed reality object pose determination, tracking or camera calibration for mixed reality G06T7/00
• CPC Class Codes: G06T 2207/10024 : Color image
• CPC Class Codes: G06T 2207/10148 : Varying focus
• CPC Class Codes: G06T 2207/10152 : Varying illumination
• CPC Class Codes: G06T 2207/30041 : Eye; Retina; Ophthalmic
• CPC Class Codes: G16H 20/17 : delivered via infusion or injection
• CPC Class Codes: G16H 40/63 : for local operation
• CPC Class Codes: G16H 40/67 : for remote operation
• CPC Class Codes: G16H 50/20 : for computer-aided diagnosis, e.g. based on medical expert systems

Abstract

Configurations are disclosed for a health system to be used in various healthcare applications, e.g., for patient diagnostics, monitoring, and/or therapy. The health system may comprise a light generation module to transmit light or an image to a user, one or more sensors to detect a physiological parameter of the user'"'"'s body, including their eyes, and processing circuitry to analyze an input received in response to the presented images to determine one or more health conditions or defects.

Claims

1. A wearable augmented reality device comprising:

an augmented reality head-mounted ophthalmic system comprising an augmented reality display platform configured to pass light from the world into an eye of a wearer wearing the head-mounted ophthalmic system;

a light source configured to provide augmented reality content on a plurality of depth planes and to project an illumination beam of light into the eye of the wearer to illuminate an anterior or posterior portion of the eye, a cross-sectional beam shape of the illumination beam configured such that a dimension of the cross-sectional beam shape along a superior-inferior direction of the eye is greater than a dimension of the cross-sectional beam shape along a nasal-temporal direction of the eye; and

an imaging system configured to track a gaze of the wearer'"'"'s eye and to capture an image of the illuminated portion of the wearer'"'"'s eye to perform a slit lamp examination to determine health of the eye.

2. The device of claim 1, wherein the light source is configured to project the illumination beam onto a location on a surface of the eye at an angle with respect to a normal to the surface at the location, wherein the angle is between about ±

10-degrees and about ±

90-degrees.

3. The device of claim 2, wherein the illumination beam is incident the location along an axis intersecting the eye and passing through the pupil.

4. The device of claim 1, wherein the illumination beam has a width along a temporal-nasal axis of the wearer'"'"'s eye, wherein the width is between about 25 microns and about 1.0 mm.

5. The device of claim 1, wherein the imaging system comprises a camera configured to track the wearer'"'"'s eye and to image the illuminated portion of the wearer'"'"'s eye to perform the slit lamp examination.

6. The device of claim 1, wherein the device is further configured to determine the health of the eye by matching a known pattern with the image captured by the imaging system.

7. The device of claim 1, wherein the device is further configured to compare the image captured by the imaging system with a previously obtained image of the eye.

8. The device of claim 1, wherein the light source comprises a fiber scanning device comprising a scanning fiber having a tip, wherein the tip of the scanning fiber is configured to move in a pattern to produce the illumination beam of light having the cross-sectional beam shape.

9. The device of claim 1, further comprising an adaptable optics element configured to project the illumination beam to selected portions of the wearer'"'"'s eye.

10. The device of claim 9, wherein the adaptable optics element comprises a variable focus element.

11. The device of claim 10, wherein the variable focus element comprises a membrane mirror.

12. The device of claim 11, further comprising:

one or more electrodes coupled to the membrane mirror; and

a control system configured to selectively control the one or more electrodes to modify a shape of the membrane mirror.

13. The device of claim 9, wherein the adaptable optics element is configured to change the angle of incidence of the illumination beam at the selected portion of the wearer'"'"'s eye.

14. The device of claim 9, wherein the adaptable optics element is configured to vary a width of the illumination beam.

15. The device of claim 9, wherein the adaptable optics element is configured to vary a depth in the wearer'"'"'s eye at which the illumination beam is focused.

16. The device of claim 1, wherein the illumination beam comprises a sheet of light.

17. A wearable augmented reality device comprising:

an augmented reality head-mounted ophthalmic system comprising an augmented reality display platform configured to pass light from the world into an eye of a wearer wearing the head-mounted ophthalmic system;

a scanning fiber device configured to project light into the eye of the wearer to illuminate the eye to perform a slit lamp examination of the eye, wherein the scanning fiber device comprises an actuator and a scanning fiber having a tip for outputting light, wherein the actuator is configured to move the tip in a pattern to project an illumination beam into the eye; and

a camera configured to capture an image of the illuminated portion of the wearer'"'"'s eye to determine a health of the eye.

18. The device of claim 17, wherein the illumination beam has a rectangular cross-sectional shape.

19. The device of claim 18, wherein a dimension of the rectangular cross-sectional shape along a superior-inferior direction of the eye is greater than a dimension of the rectangular cross-sectional beam shape along a nasal-temporal direction of the eye.

20. The device of claim 17, wherein the device is further configured to determine the health of the eye by matching a known pattern with the image captured by the camera.

21. A wearable augmented reality device configured to be used by a wearer, the device comprising:

an augmented reality head-mounted ophthalmic system comprising an augmented reality display platform configured to pass light from the world into an eye of a wearer wearing the head-mounted system, wherein the augmented reality display platform comprises a light source configured to provide augmented reality content into the eye of the wearer, wherein the light source is also configured to project a sheet of light into the eye of the wearer to illuminate an anterior or posterior portion of the eye for a slit lamp examination; and

a camera configured to capture an image of the illuminated portion of the wearer'"'"'s eye to perform the slit lamp examination to determine a health of the eye.

22. The device of claim 21, wherein the light source is configured to project the sheet of light incident on a location on a surface of the eye at a non-normal angle to the surface of the eye at the location.

23. The device of claim 21, wherein the device is further configured to determine the health of the eye by matching a known pattern with the image captured by the camera.

24. The device of claim 21, wherein the camera comprises an infrared camera.