# US 10,871,660 B2 · Dynamic presbyopia correction in electronic contact lenses > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,871,660 B2 - Document ID: US10871660B2 - Status: Granted - Kind: B2 - Application number: 16/228,288 - Filed: 2018-12-20 - Published: 2020-06-25 - Granted: 2020-12-22 - Earliest claimed: 2018-12-20 - Assignees: Tectus Corporation - Applicants: Spy Eye, LLC - Inventors: Brian Elliot Lemoff - Web page: https://patentgrep.com/patent/US10871660B2 ## CPC - G02C 7/041: {bifocal; multifocal} - G02C 7/047: {Contact lens fitting; Contact lenses for orthokeratology; Contact lenses for specially shaped corneae} - G02C 7/049: {Contact lenses having special fitting or structural features achieved by special materials or material structures} - G02C 7/083: {Electrooptic lenses} - G02C 11/10: {Electronic devices other than hearing aids} - G02F 1/29: for the control of the position or the direction of light beams, i.e. deflection - G06F 3/012: {Head tracking input arrangements} - G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)} - G06F 3/0346: with detection of the device orientation or free movement in a three-dimensional [3D] space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors - G02F 1/294: {Variable focal length devices} - 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) - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A contact lens comprises a variable focal length lens embedded within the contact lens and a plurality of oxygen channels extending from an oxygen-permeable outer layer of the contact lens to an oxygen-permeable inner layer of the contact lens. The variable focal length lens is embedded within a non-oxygen-permeable core layer of the contact lens. The contact lens comprises a controller configured to change the operating mode of the contact lens by adjusting the focal distance of the variable focal length lens, for instance in response to an input from a user or in response to determining that the user is looking at a nearby object. For instance, the controller can configure the contact lens to operate in a reading mode or in a normal focus mode. ## Claims ### Claim 1 A contact lens comprising: a variable focal length lens embedded within the contact lens; a plurality of oxygen channels extending from an oxygen-permeable outer layer of the contact lens to an oxygen-permeable inner layer of the contact lens, wherein the variable focal length lens is embedded within a non-oxygen-permeable core layer, the non-oxygen-permeable core layer between the oxygen-permeable outer layer and the oxygen-permeable inner layer, and wherein an air gap is formed between the non-oxygen-permeable core layer and each of the oxygen-permeable outer layer and the oxygen permeable inner layer; and a controller configured to: receive an input indicating a request to configure the contact lens to operate in a reading mode; and in response to the input, configure the variable focal length lens into a reading mode configuration. ### Claim 2 (depends on 1) The contact lens of claim 1, further comprising an image sensor embedded within the contact lens to capture images representative of a field of view of the user's eye, and wherein receiving the input comprises detecting vergence of the user's eyes. ### Claim 3 (depends on 1) The contact lens of claim 1, further comprising one or more eye tracking sensors configured to sense an orientation of the user's eye, and wherein receiving the input comprises detecting a movement of the user's eye that corresponds to an eye gesture associated with the reading mode. ### Claim 4 (depends on 1) The contact lens of claim 1, further comprising one or more eye tracking sensors configured to sense an orientation of the user's eye, and wherein receiving the input comprises a detection of vergence of the user's eyes beyond a predetermined threshold. ### Claim 5 (depends on 1) The contact lens of claim 1, further comprising a sensor embedded within the contact lens, and wherein receiving the input comprises detecting a distance between the sensor and a corresponding sensor in a second contact lens falling below a threshold distance. ### Claim 6 (depends on 1) The contact lens of claim 1, wherein receiving the input comprises detecting a hand gesture associated with the reading mode. ### Claim 7 (depends on 1) The contact lens of claim 1, wherein receiving the input comprises detecting a spoken command associated with the reading mode. ### Claim 8 (depends on 1) The contact lens of claim 1, wherein receiving the input comprises determining that the user is reading. ### Claim 9 (depends on 1) The contact lens of claim 1, wherein receiving the input comprises detecting that the user is looking downward with respect to the head. ### Claim 10 (depends on 9) The contact lens of claim 9, wherein detecting that the user is looking downward comprises detecting a bottom eyelid of the user by a capacitive sensor within the contact lens. ### Claim 11 (depends on 9) The contact lens of claim 9, wherein detecting that the user is looking downward comprises detecting a downward motion of an eye of the user by one or more sensors within the contact lens. ### Claim 12 (depends on 1) The contact lens of claim 1, wherein a focal length of the variable focal length lens is adjusted by adjusting at least a voltage provided to the variable focal length lens, the adjusted voltage causing a refractive index of a material of the variable focal length lens to change. ### Claim 13 (depends on 1) The contact lens of claim 1, wherein the variable focal length lens has a flat surface. ### Claim 14 (depends on 13) The contact lens of claim 13, wherein the variable focal length lens is between 1 mm and 5 mm in diameter. ### Claim 15 (depends on 1) The contact lens of claim 1, wherein the variable focal length lens has a curved surface. ### Claim 16 (depends on 15) The contact lens of claim 15, wherein the surface of the variable focal length lens is between 2 mm and 8 mm in diameter. ### Claim 17 A method comprising: receiving an input from a user, the input indicating a request to configure an electronic contact lens to operate in a reading mode; and in response to receiving the input, configuring a variable focal length lens of the electronic contact lens into a reading mode configuration, the variable focal length lens embedded in a contact lens, wherein the contact lens comprises a plurality of oxygen channels extending from an oxygen-permeable outer layer of the contact lens to an oxygen-permeable inner layer of the contact lens, wherein the variable focal length lens is embedded within a non-oxygen-permeable core layer, the non-oxygen-permeable core layer between the oxygen-permeable outer layer and the oxygen-permeable inner layer, and wherein an air gap is formed between the non-oxygen-permeable core layer and each of the oxygen-permeable outer layer and the oxygen permeable inner layer. ### Claim 18 (depends on 17) The method of claim 17, wherein the electronic contact lens further comprises an image sensor embedded within the contact lens to capture images representative of a field of view of the user's eye, and wherein receiving the input comprises detecting vergence of the user's eyes. ### Claim 19 (depends on 17) The method of claim 17, wherein the electronic contact lens further comprises one or more eye tracking sensors configured to sense an orientation of the user's eye, and wherein receiving the input comprises detecting a movement of the user's eye that corresponds to an eye gesture associated with the reading mode. ### Claim 20 (depends on 17) The method of claim 17, wherein the electronic contact lens further comprises one or more eye tracking sensors configured to sense an orientation of the user's eye, and wherein receiving the input comprises a detection of vergence of the user's eyes beyond a predetermined threshold.