Eye tracking headset and system for neuropsychological testing including the detection of brain damage
First Claim
1. In a neuropsychological testing system involving smooth pursuit eye tracking, an apparatus for measuring gaze direction without calibration while eliminating environmental effects, the apparatus comprising:
- a headset adapted to fit over a face of a test subject and to be mounted on a head of said test subject, the headset including a screen positioned at a predetermined distance from the eyes of said test subject when the headset is mounted on the head of said test subject,wherein the headset further includes a pair of prisms positioned between the eyes of said test subject and said screen such that the prisms direct light emitted from a spot on the screen to the eyes of the test subject.
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Accused Products
Abstract
A universal headset-mounted Neuropsychological Testing System utilizes eye tracking, with a single screen fixed with respect to the face and a dot on the screen driven to present an object that both eyes are focused on using a set of prisms, with the prisms eliminating interocular distance considerations. Ultrathin optics cast a virtual image at 40 centimeters and a universal mask against which the test taker'"'"'s face is placed fixes the single screen with respect to the face so that head movement is not a factor. Additionally, miniature cameras are located in the headset housing beneath the eyes, and a quick release tensioning unit provides easy headset mounting and removal. Moreover, all elements are located in the headset hood to eliminate the effects of head movement as well as environmental distractions.
34 Citations
17 Claims
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1. In a neuropsychological testing system involving smooth pursuit eye tracking, an apparatus for measuring gaze direction without calibration while eliminating environmental effects, the apparatus comprising:
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a headset adapted to fit over a face of a test subject and to be mounted on a head of said test subject, the headset including a screen positioned at a predetermined distance from the eyes of said test subject when the headset is mounted on the head of said test subject, wherein the headset further includes a pair of prisms positioned between the eyes of said test subject and said screen such that the prisms direct light emitted from a spot on the screen to the eyes of the test subject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A neuropsychological testing system involving smooth pursuit eye tracking, comprising:
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a headset having a hood adapted to cover a face of a test subject, the headset including a screen spaced from the eyes of a test subject; a flexible spine coupled to said headset with one end of said hood attached to a forward end of said spine, said spine having an occipital lobe contact pad at a distal end of said spine and adapted to contact the occipital lobe of said test subject when said headset is mounted on the head of the test subject; a pair of strands running from the end of said spine adjacent to said occipital lobe contact pad to said hood; and a knob for tightening said strands to draw said hood towards said occipital lobe contact pad, with said spine flexing during the tightening of said strands.
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13. A universal headset mounted neuropsychological testing system utilizing eye tracking, the system comprising:
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a headset adapted to fit over a face of a test subject said headset including a hood adapted to be attached to a front side of the face of the test subject and including a single screen, wherein a dot moving along a path is provided on said single screen; a mask fixed to said headset and adapted to contact the face of said test subject around the periphery thereof, the mask having apertures therein adapted to be positioned adjacent to the eyes of said test subject; a pair of prisms between the apertures in said mask and said single screen so as to direct light emitted from a spot on said screen to the eyes of the test subject; a camera located within said hood and adapted to be trained on an eye of said test subject, said camera having a focal plane array and optics to project the iris of the associated eye of said test subject onto said focal plane array; a light emitting device and optics adapted to focus the light therefrom onto a portion of the iris of the eye of said test subject to form a glint thereon; and a processor coupled to said focal plane array for measuring the centroid of said iris and the position of the associated glint, for calculating the direction of gaze of the eye of said test subject based on a vector between said centroid position and said glint position, and for calculating anticipatory timing of said eye as it tracks said dot on said screen in response to said gaze calculation, wherein said hood and mask filter out environmental factors while said screen and said light emitting device are positioned at predetermined distances from the eye of said test subject. - View Dependent Claims (14, 15, 16, 17)
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Specification