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, apparatus for measuring gaze direction without calibration while at the same time eliminating environmental effects, comprising:
- A headset adapted to fit over the face of a test subject, the headset locating a single screen spaced a predetermined distance from the eyes of said 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.
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Citations
20 Claims
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1. In a neuropsychological testing system involving smooth pursuit eye tracking, apparatus for measuring gaze direction without calibration while at the same time eliminating environmental effects, comprising:
A headset adapted to fit over the face of a test subject, the headset locating a single screen spaced a predetermined distance from the eyes of said test subject. - View Dependent Claims (2, 3, 4, 5, 8, 9, 10, 11, 12, 13, 14)
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6. In a neuropsychological testing system involving smooth pursuit eye tracking, apparatus useful in the measuring of gaze direction without calibration while at the same time eliminating environmental effects, comprising:
A headset adapted to fit over the face of a test subject, the headset locating a single screen spaced a predetermined distance from the eyes of said test subject, said headset including a hood having a mask at the end opposite that carrying said screen, said mask adapted to fit about the face of said test subject and having apertures therethrough so that the test subject can look through the mask to said screen. - View Dependent Claims (7)
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15. In a neuropsychological testing system involving smooth pursuit eye tracking,
a headset having a hood adapted to cover the face of a test subject, the headset locating 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 pad at a distal end adapted to contact the occipital lobe of said test subject when said headset is in place, a pair of strands running from the end of said spine adjacent said occipital lobe pad to said hood; - and,
a ratchet for tightening said strands to draw said hood towards said occipital lobe pad, with said spine flexing during the tightening of said strands.
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16. A universal headset mounted neuropsychological testing system utilizing eye tracking comprising:
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a headset adapted to fit over the face of a test subject said headset including a hood adapted to be attached to the front face of the test subject and including a single screen; a driver for providing a dot on said single screen that moves along a path; 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 the eyes of said test subject; a pair or prisms between the apertures in said mask and said single screen so as to bend the lines of sight from the eyes of said test subject to converge at a single spot on said screen; 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 said subject to form a glint thereon; and
,a smooth pursuit processor coupled to said focal plane array for measuring the centroid of said iris and the position of the associated glint and 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, said hood and mask filtering out environmental factors while locating said screen and said light emitting device at a predetermined distance from the eye of said test subject. - View Dependent Claims (17, 18, 19, 20)
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Specification