# US 2014/0156000 A1 · Sensors for triggering electro-active ophthalmic lenses > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0156000 A1 - Document ID: US20140156000A1 - Status: Published application - Kind: A1 - Application number: 14/041,312 - Filed: 2013-09-30 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Assignees: Novartis AG - Applicants: Novartis AG - Inventors: JOHN ALFRED CAMPIN; GEORGE H. PETTIT - Web page: https://patentgrep.com/patent/US20140156000A1 ## CPC - A61F 2/1624: {having adjustable focus; power activated variable focus means, e.g. mechanically or electrically by the ciliary muscle or from the outside} - A61B 5/389: Electromyography [EMG] - A61B 5/6803: {Head-worn items, e.g. helmets, masks, headphones or goggles} - G02C 7/04: Contact lenses for the eyes (disinfection or sterilisation of contact lenses A61L12/00) - G02C 7/083: {Electrooptic lenses} - A61B 3/09: for testing accommodation - A61F 2/482: {Electrical means} - A61F 2250/0002: for data transfer - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - 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 An electro-active ophthalmic lens includes an electromyography sensor, a processor, and an electro-active optical element. The electromyography sensor is configured to detect an electric field in a ciliary muscle of the eye that is proportional to a force exerted by the ciliary muscle and to generate a sensor signal indicative of the electric field. The processor is operable to receive the signal from the electromyography sensor and to determine, based on the sensor signal, an adjustment to optical power for an electro-active optical element and to generate a control signal for the electro-active optical element. The electro-active optical element is operable to receive the control signal and to change an optical power of the electro-active optical element in response to the control signal. ## Claims ### Claim 1 An electro-active ophthalmic lens, comprising: at least one electromyography sensor configured to detect an electric field in a ciliary muscle of the eye that is proportional to a force exerted by the ciliary muscle and to generate a sensor signal indicative of the electric field; a processor coupled to the electromyography sensor operable to receive the signal from the electromyography sensor and to determine, based on the sensor signal, an adjustment to optical power for an electro-active optical element and to generate a control signal for the electro-active optical element; and the electro-active optical element coupled to the processor operable to receive the control signal and to change an optical power of the electro-active optical element in response to the control signal. ### Claim 2 (depends on 1) The lens of claim 1, wherein the lens is an intraocular lens. ### Claim 3 (depends on 1) The lens of claim 1, wherein the lens is a contact lens. ### Claim 4 (depends on 1) The lens of claim 1, wherein the at least one sensor comprises a plurality of sensors including a reference sensor. ### Claim 5 (depends on 1) The lens of claim 1, wherein the at least one sensor comprises an electrode in contact with the ciliary muscle. ### Claim 6 (depends on 1) The lens of claim 1, wherein the at least one sensor comprises a non-contact electromagnetic sensor. ### Claim 7 An electro-active ophthalmic lens, comprising: at least one sensor configured to detect a predetermined manual trigger for an electro-active optical element; a processor coupled to the sensor operable to receive the signal from the sensor and to determine, based on the sensor signal, an adjustment to optical power for the electro-active optical element and to generate a control signal for the electro-active optical element; and the electro-active optical element coupled to the processor operable to receive the control signal and to change an optical power of the electro-active optical element in response to the control signal, wherein the change in the optical power of the electro-active element is at least 6 Diopters. ### Claim 8 (depends on 1) The lens of claim 1, wherein the manual trigger comprises a pattern of eye blinks. ### Claim 9 (depends on 1) The lens of claim 1, wherein the manual trigger comprises pressure exerted on an eye. ### Claim 10 (depends on 1) The lens of claim 1, wherein the manual trigger comprises motion of a hand near an eye. ### Claim 11 (depends on 1) The lens of claim 1, wherein the manual trigger comprises pressing on a subdermal switch. ### Claim 12 (depends on 1) The lens of claim 1, wherein the manual trigger comprises moving a magnetic control near the eye. ### Claim 13 (depends on 1) The lens of claim 1, wherein the manual trigger comprises triggering a signal from a wireless remote. ### Claim 14 (depends on 1) The lens of claim 1, wherein the processor is configured to automatically revert the optical power of the electro-active optical element to an initial state in response to detecting a fail-safe condition.