Unobtrusive active eye interrogation
First Claim
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1. A system for sensing information from an eye of a subject, comprising:
- an interrogation signal source for delivering an interrogation signal to the eye of the subject;
a response signal sensor for sensing a response signal produced by the eye of the subject responsive to the interrogation signal;
a gaze attractor adapted to attract the gaze of the subject to thereby cause the eye of the subject to move into alignment with at least one of the interrogation signal source and the response signal sensor; and
signal processing circuitry including;
a response signal processor configured to process a response signal sensed from the eye of the subject when the eye of the subject is in alignment with respect to the at least one of the interrogation signal source and the response signal sensor to determine a physiological parameter from the response signal; and
an data transmission structure adapted to output a signal relating to the determined physiological parameter.
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Abstract
Methods and systems for determining a physiological parameter of a subject through interrogation of an eye of the subject with an optical signal are described. Interrogation is performed unobtrusively. The physiological parameter is determined from a signal sensed from the eye of a subject according to a schedule, under the control of a scheduling controller.
48 Citations
43 Claims
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1. A system for sensing information from an eye of a subject, comprising:
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an interrogation signal source for delivering an interrogation signal to the eye of the subject; a response signal sensor for sensing a response signal produced by the eye of the subject responsive to the interrogation signal; a gaze attractor adapted to attract the gaze of the subject to thereby cause the eye of the subject to move into alignment with at least one of the interrogation signal source and the response signal sensor; and signal processing circuitry including; a response signal processor configured to process a response signal sensed from the eye of the subject when the eye of the subject is in alignment with respect to the at least one of the interrogation signal source and the response signal sensor to determine a physiological parameter from the response signal; and an data transmission structure adapted to output a signal relating to the determined physiological parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 29, 30, 31)
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8. A method of measuring information from an eye of a subject, comprising;
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delivering an interrogation signal to the eye of the subject with an interrogation signal source; detecting a response signal from the eye of the subject with a response signal sensor, wherein the interrogation signal is reflected from a region or structure within the eye of the subject to form the response signal; controlling a gaze attractor to cause the eye of the subject to move into alignment with at least one of the interrogation signal source and the response signal sensor; determining a physiological parameter of the subject from the response signal detected from the eye of the subject when the eye of the subject is in alignment with respect to the at least one of the interrogation signal source and the response signal sensor, wherein the physiological parameter includes a measurement of at least one of a substance in the blood of the subject, a substance in an aqueous humor of the subject, oxygen, glucose, a salt, a protein, a lipid, a gas, a hormone, a drug, a pulse rate, a blood flow, and a temperature; and transmitting at least one of information regarding the subject, information regarding a method used for determining the physiological parameter, or information regarding the physiological parameter to a data processing system. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification