Unobtrusive active eye interrogation
First Claim
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1. A method of measuring information from an eye of a subject, comprising;
- 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;
determining whether the eye of the subject is in alignment with respect to at least one of the interrogation signal source and the response signal sensor, wherein determining whether 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 includes determining that the at least one of the interrogation signal source and the response signal sensor lies within a specified number of degrees of a gaze direction of the eye of the subject; and
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, including at least one of determining the physiological parameter of the subject from the response signal detected from the eye of the subject at one or more set times and determining the physiological parameter of the subject from the response signal detected from the eye of the subject at a set time interval.
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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 when the eye of the subject is properly aligned with regard to an interrogation signal source and/or response signal sensor.
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22 Claims
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1. 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; determining whether the eye of the subject is in alignment with respect to at least one of the interrogation signal source and the response signal sensor, wherein determining whether 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 includes determining that the at least one of the interrogation signal source and the response signal sensor lies within a specified number of degrees of a gaze direction of the eye of the subject; and 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, including at least one of determining the physiological parameter of the subject from the response signal detected from the eye of the subject at one or more set times and determining the physiological parameter of the subject from the response signal detected from the eye of the subject at a set time interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification