# US 2014/0194710 A1 · Contact lens with integrated pulse oximeter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194710 A1 - Document ID: US20140194710A1 - Status: Published application - Kind: A1 - Application number: 14/029,345 - Filed: 2013-09-17 - Published: 2014-07-10 - Earliest claimed: 2012-08-21 - Assignees: Google Inc. - Applicants: Google Inc. - Inventors: Harvey Ho; Babak Amirparviz - Web page: https://patentgrep.com/patent/US20140194710A1 ## CPC - A61B 5/14555: {specially adapted for the eye fundus} - A61B 5/0004: {characterised by the type of physiological signal transmitted} - A61B 5/0205: Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition - A61B 5/024: Measuring pulse rate or heart rate - A61B 5/02416: {using photoplethysmograph signals, e.g. generated by infrared radiation (A61B5/14552 takes precedence)} - A61B 5/02444: {Details of sensor (A61B5/02427 takes precedence)} - A61B 5/14551: {for measuring blood gases} - A61B 5/1495: Calibrating or testing of in-vivo probes - A61B 5/6821: {Eye} - A61B 5/72: {Signal processing specially adapted for physiological signals or for diagnostic purposes} - A61B 5/7445: {Display arrangements, e.g. multiple display units} - G02C 7/04: Contact lenses for the eyes (disinfection or sterilisation of contact lenses A61L12/00) - G02C 11/10: {Electronic devices other than hearing aids} - A61B 5/02427: {Details of sensor} - A61B 5/14552: {Details of sensors specially adapted therefor} - A61B 2560/0223: of calibration, e.g. protocols for calibrating sensors - A61B 2560/0242: adapted to measure environmental factors, e.g. temperature, pollution - A61B 2560/0247: for compensation or correction of the measured physiological value - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00) ## Abstract Apparatus, systems and methods employing a contact lens having a pulse oximetry sensor to detect information indicative of a blood oxygen content and/or pulse rate of a wearer of the contact lens, are provided. In some aspects, a contact lens includes a substrate that forms at least part of a body of the contact lens and a pulse oximetry sensor located on or within the substrate that detects information associated with at least one of blood oxygen content or a pulse rate of a wearer of the contact lens. The pulse oximetry sensor comprises one or more light emitting diodes that illuminate a blood vessel of at least one of a region of an eye or an eyelid and a detector that receives light reflected from the blood vessel and generates the information. ## Claims ### Claim 1 A contact lens, comprising: a substrate that forms at least part of a body of the contact lens; and a pulse oximetry sensor located on or within the substrate configured to detect information associated with at least one of a blood oxygen content or a pulse rate of a wearer of the contact lens, the pulse oximetry sensor comprising: one or more light emitting diodes configured to illuminate a blood vessel of at least one of a region of an eye or an eyelid; and a detector configured to receive light from the blood vessel and generate the information; wherein the one or more light emitting diodes and the detector are positioned away from a center of the contact lens; the contact lens configured to maintain an orientation when worn on an eye such that the one or more light emitting diodes and the detector are not covered by an eyelid when the eye is open. ### Claim 2 (depends on 1) The contact lens of claim 1, wherein the detector is further configured to receive light reflected from the blood vessel of the eye, and wherein the information includes a signal indicating an amount of light reflected from the blood vessel in response to illumination of the blood vessel by the one or more light emitting diodes. ### Claim 3 (depends on 1) The contact lens of claim 1, wherein the one or more light emitting diodes are configured to illuminate the blood vessel over a period of time as the blood vessel expands and contracts, and wherein the information includes a signal indicating time variance in an amount of light received from the blood vessel, in response to illumination of the blood vessel by the one or more light emitting diodes, between blood vessel expansion and contraction. ### Claim 4 (depends on 1) The contact lens of claim 1, wherein the detector is further configured to receive light transmitted through the blood vessel of the eye, and wherein the information includes a signal indicating an amount of light transmitted through the blood vessel in response to illumination of the blood vessel by the one or more light emitting diodes. ### Claim 5 (depends on 1) The contact lens of claim 1, wherein the information includes a signal indicating an amount of light reflected from the blood vessel when the one or more light emitting diodes do not illuminate the blood vessel and the eye is open, and an amount of light reflected from the blood vessel when the one or more light emitting diodes do not illuminate the blood vessel and the eye is shut. ### Claim 6 (depends on 1) The contact lens of claim 1, wherein at least one of the one or more light emitting diodes are configured to emit infrared light. ### Claim 7 (depends on 1) The contact lens of claim 1, wherein the one or more light emitting diodes include a first diode that is configured to emit infrared light and a second diode that is configured to emit red light. ### Claim 8 (depends on 1) The contact lens of claim 1, further comprising: a circuit disposed on or within the substrate configured to receive the information associated with the at least one of the blood oxygen content or the pulse rate; and a transceiver configured to transmit the information. ### Claim 9 (depends on 8) The contact lens of claim 8, wherein the pulse oximetry sensor is configured to detect the information in response to a request from a device external to the contact lens and wherein the transceiver is configured to receive the request and transmit the information in response to the request. ### Claim 10 (depends on 8) The contact lens of claim 8, further comprising a processor configured to determine at least one of the blood oxygen content or the pulse rate of the wearer of the contact lens based on the information. ### Claim 11 (depends on 9) The contact lens of claim 9, wherein the transceiver is configured to transmit a message indicating at least one of the blood oxygen content or the pulse rate of the wearer of the contact lens in response to a determination that the blood oxygen content or the pulse rate is outside a predetermined range. ### Claim 12 A method comprising: detecting information associated with at least one of a blood oxygen content or a pulse rate of a wearer of a contact lens using a pulse oximetry sensor located on or within the contact lens, the pulse oximetry sensor comprising one or more light emitting diodes and a detector, wherein the one or more light emitting diodes and the detector are positioned away from the center of the contact lens, the contact lens configured to maintain an orientation when worn on an eye such that the one or more light emitting diodes and the detector are not covered by an eyelid when the contact lens is worn on an eye and the eye is open. ### Claim 13 (depends on 12) The method of claim 12, wherein the detecting the information comprises: illuminating a blood vessel of at least one of a region of an eye or an eyelid via the one or more light emitting diodes; receiving reflected light reflected from the blood vessel at the detector; and generating the information based in part on the reflected light. ### Claim 14 (depends on 13) The method of claim 13, wherein the information includes a signal indicating an amount of light reflected from the blood vessel in response to the illuminating. ### Claim 15 (depends on 13) The method of claim 13, wherein the illuminating further comprises, via the one or more light emitting diodes, illuminating the blood vessel over a period of time as the blood vessel expands and contracts, and wherein the information includes a includes a signal indicating a time variance in an amount of light reflected from the blood vessel, in response to the illuminating, between blood vessel expansion and contraction. ### Claim 16 (depends on 12) The method of claim 12, wherein the detecting the information comprises: illuminating a blood vessel of at least one of a region of an eye or an eyelid via the one or more light emitting diodes; receiving transmitted light transmitted through the blood vessel at the detector in response to the illuminating; and generating the information based in part on the transmitted light. ### Claim 17 (depends on 12) The method of claim 12, wherein the detecting the information comprises: receiving open light at the detector when the one or more emitting diodes are off and the eye is open; receiving closed light at the detector when the one or more emitting diodes are off and the eye is shut, wherein the closed light is transmitted through a blood vessel in the eyelid; and generating the information based in part on open light and the closed light. ### Claim 18 (depends on 12) The method of claim 12, wherein at least one of the one or more light emitting diodes emit infrared light. ### Claim 19 (depends on 12) The method of claim 12, wherein the one or more light emitting diodes include a first diode that emits infrared light and a second diode that emits red light. ### Claim 20 (depends on 12) The method of claim 12, further comprising transmitting the information to a device external to the contact lens. ### Claim 21 (depends on 12) The method of claim 12, further comprising: receiving a request for the information from a device external to the contact lens, wherein the detecting the information comprises detecting the information in response to the request; and transmitting the information to the device in response to the request. ### Claim 22 A device, comprising: a memory that stores computer executable components; and a processor that executes the following computer executable components stored in the memory: an interface component that interfaces with and receives from a contact lens, data collected from a sensor on the contact lens relating to at least one of a blood oxygen content or a pulse rate of a wearer of a contact lens; a request component that transmits a request to the contact lens, wherein the request includes instructions for the sensor to generate calibration information, wherein the calibration information includes a baseline environmental light level; an analysis component that analyzes the received data and the calibration information and determines at least one of the blood oxygen content or the pulse rate of a wearer of a contact lens; and a display component that generates a display corresponding to the data. ### Claim 23 (depends on 22) The device of claim 22, wherein the request includes a request for the data.