# US 10,765,558 B2 · Method and arrangement for eye measurements > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,765,558 B2 - Document ID: US10765558B2 - Status: Granted - Kind: B2 - Application number: 15/911,867 - Filed: 2018-03-05 - Published: 2018-07-12 - Granted: 2020-09-08 - Earliest claimed: 2015-09-03 - Assignees: Photono Oy - Applicants: Photono Oy - Inventors: Edward Haeggström; Ari Salmi; Ivan Kassamakov; Heikki Nieminen; Timo Rauhala; Kalle Hanhijärvi; Antti Kontiola - Web page: https://patentgrep.com/patent/US10765558B2 ## CPC - A61F 9/00781: {Apparatus for modifying intraocular pressure, e.g. for glaucoma treatment (drainage implants in general A61M27/002)} - A61B 3/1005: {for measuring distances inside the eye, e.g. thickness of the cornea (A61B3/11 takes precedence)} - A61B 3/16: for measuring intraocular pressure, e.g. tonometers - A61B 3/165: {Non-contacting tonometers} - A61F 9/008: using laser - A61F 2009/00872: {Cornea} - 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) ## Abstract An intraocular pressure measurement arrangement is disclosed for measuring pressure of an eye of a patient. The arrangement can detect at least one of acoustic reflectivity, optical reflectivity, optical path difference, positioning of intraocular pressure measurement arrangement with respect to the eye, orientation of intraocular pressure measurement arrangement with respect to the eye, shape of cornea and corneal thickness. At least one source can produce acoustic, nonlinear acoustic, mechanical or a nonlinear mechanical wave from a distance, coupling to the eye to generate at least one surface wave. Upon triggering data acquisition, at least one surface wave from a distance from the eye can be detected to extract surface wave information with pressure information of the eye being based on the surface wave information. ## Claims ### Claim 1 An intraocular pressure measurement arrangement for measuring eye pressure, the arrangement comprising: at least one source configured to produce an excitation pressure pulse formed by nonlinear waves in which a principle of superposition does not hold, and transmitted by air to a surface of an eye to generate at least one surface wave for an eye measurement; a detector configured to detect, based on light reflected off the eye, the at least one surface wave at a distance from the surface for extracting surface wave information; and one or more processors configured to determine the eye pressure based on said surface wave information. ### Claim 2 (depends on 1) The intraocular pressure measurement arrangement according to claim 1, wherein the detector configured to detect the at least one surface wave comprises: one or more devices configured to determine the velocity of the surface wave. ### Claim 3 (depends on 1) The intraocular pressure measurement arrangement according to claim 1, wherein the detector configured to detect the at least one surface wave comprises: one or more processing devices configured to determine changes, caused by the surface wave, in a light-interference pattern on a corneal eye surface. ### Claim 4 (depends on 1) The intraocular pressure measurement arrangement according to claim 1, further comprising: means for linear wave pick-up. ### Claim 5 (depends on 1) The intraocular pressure measurement arrangement according to claim 1, further comprising: means for shaping the nonlinear waves. ### Claim 6 (depends on 1) The intraocular pressure measurement arrangement according to claim 1, further comprising: a measurement system configured to measure the surface wave with a 2-8 mm wide measurement beam. ### Claim 7 (depends on 1) The intraocular pressure measurement arrangement according to claim 1, further comprising: means for obtaining corneal curvature information. ### Claim 8 (depends on 1) The intraocular pressure measurement arrangement according to claim 1, further comprising: means for obtaining corneal thickness information. ### Claim 9 (depends on 1) The intraocular pressure measurement arrangement according to claim 1, further comprising: one or more processors configured to determine curvature of a cornea. ### Claim 10 An intraocular pressure measurement method for measuring eye pressure, the method comprising: producing an excitation pressure pulse formed by nonlinear waves in which a principle of superposition does not hold, and transmitted by air to a surface of an eye to generate at least one surface wave for an eye measurement; detecting, based on light reflected off the eye, at least one surface wave at a distance from the surface to extract eye surface wave information; and determining the eye pressure based on said surface wave information. ### Claim 11 (depends on 10) The intraocular pressure measurement method according to claim 10, further comprising: determining the velocity of the surface wave. ### Claim 12 (depends on 10) The intraocular pressure measurement method according to claim 10, further comprising: determining changes, caused by the surface wave, in a light-interference pattern on a corneal eye surface. ### Claim 13 (depends on 10) The intraocular pressure measurement method according to claim 10, further comprising: conducting a linear wave pick-up. ### Claim 14 (depends on 10) The intraocular pressure measurement method according to claim 10, further comprising: shaping the non-linear waves. ### Claim 15 (depends on 10) The intraocular pressure measurement method according to claim 10, further comprising: measuring the surface wave with a 2-8 mm wide measurement beam. ### Claim 16 (depends on 10) The intraocular pressure measurement method according to claim 10, further comprising: obtaining corneal curvature information. ### Claim 17 (depends on 10) The intraocular pressure measurement method according to claim 10, further comprising: obtaining corneal thickness information. ### Claim 18 (depends on 10) The intraocular pressure measurement method according to claim 10, further comprising: determining curvature of a cornea. ### Claim 19 An intraocular pressure measurement arrangement for measuring eye pressure, the arrangement comprising: at least one source configured to produce an excitation pressure pulse formed by nonlinear waves in which a principle of superposition does not hold, and transmitted by air to a surface of an eye to generate at least one surface wave for an eye measurement; a detector configured to detect, based on light reflected off the eye, the at least one surface wave at a distance from the surface to extract surface wave information; and one or more processors configured to determine an eye pressure based on said surface wave information.