# US 2014/0155726 A1 · Dynamic tonometry device and method for controlling coaxiality of probe with eyeball > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155726 A1 - Document ID: US20140155726A1 - Status: Published application - Kind: A1 - Application number: 14/232,262 - Filed: 2013-01-07 - Published: 2014-06-05 - Earliest claimed: 2012-08-06 - Assignees: Huainan Normal University - Applicants: Huainan Normal University - Inventors: Jianguo Ma; Jin Zhang; Yijie Wang; Ming Liu - Web page: https://patentgrep.com/patent/US20140155726A1 ## CPC - A61B 3/16: for measuring intraocular pressure, e.g. tonometers - A61B 3/0025: {characterised by electronic signal processing, e.g. eye models} - A61B 3/14: Arrangements specially adapted for eye photography - A61B 3/0008: {provided with illuminating means (A61B3/117, A61B3/14 take precedence)} - A61B 3/18: Arrangement of plural eye-testing or -examining apparatus - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A dynamic tonometry device includes a probe, a housing, a sleeve, a light source, an image sensor, a pressure sensor, a microprocessor and a display storage. The probe is a truncated cone with small at left and large at right. The sleeve is fitted on the probe. An end face of a small end of the probe is situated to a left of a left end face of the sleeve. A right end of the sleeve is connected to a left end of the housing; on a large end of the probe is installed the pressure sensor; inside the housing are installed the light source and the image sensor. Light emitted by the light source is collimated into a light beam which is incident to the probe and totally reflected before entering the image sensor. With the microprocessor are connected the pressure sensor, the image sensor and the display storage. ## Claims ### Claim at position 1 1-10. (canceled) ### Claim 11 A dynamic tonometry device, comprising a probe, a housing, a sleeve, a light source, an image sensor, a pressure sensor, a microprocessor, a display storage and a power source, the probe taking a form of a truncated cone with small at left and large at right and being made of transparent optical materials; an inner hole of the sleeve being in the same form as the probe; the sleeve being slidably fitted on the probe; an end face of a small end of the probe being situated to a left of a left end face of the sleeve; a right end of the sleeve being fixedly connected with a left end of the housing; on a large end of the probe being installed the pressure sensor; a sensing end of the pressure sensor being pressed against a left end face of the housing; inside the housing being installed the light source, the image sensor and a convex lens; light emitted by the light source being collimated through the convex lens into a parallel light beam, and then the light beam being vertically incident to the large end of the probe; after performing total reflection inside the probe, the light beam entering into the image sensor; inside the housing being installed the microprocessor, the display storage and the power source; with the power source being connected the microprocessor, the display storage, the pressure sensor, the image sensor and the light source; with the microprocessor being connected the pressure sensor, the image sensor and the display storage. ### Claim 12 (depends on 11) The dynamic tonometry device according to claim 11, wherein a central axis of the convex lens coincides with an axis of the probe. ### Claim 13 (depends on 11) The dynamic tonometry device according to claim 11, wherein the light source and the image sensor are respectively located on both sides of an axis of the probe. ### Claim 14 (depends on 11) The dynamic tonometry device according to claim 11, wherein on an inner wall of the left end of the housing is fixedly mounted an annular metallic press-ring; the pressure sensor is an annular electric pressure sensor; at a joint portion between a right end face and a circumferential face of the probe is provided an annular groove, inside which the pressure sensor is fixedly mounted; and the sensing end of the pressure sensor is in contact with the annular metallic press-ring. ### Claim 15 (depends on 12) The dynamic tonometry device according to claim 12, wherein on an inner wall of the left end of the housing is fixedly mounted an annular metallic press-ring; the pressure sensor is an annular electric pressure sensor; at a joint portion between a right end face and a circumferential face of the probe is provided an annular groove, inside which the pressure sensor is fixedly mounted; and the sensing end of the pressure sensor is in contact with the annular metallic press-ring. ### Claim 16 (depends on 13) The dynamic tonometry device according to claim 13, on wherein an inner wall of the left end of the housing is fixedly mounted an annular metallic press-ring; the pressure sensor is an annular electric pressure sensor; at a joint portion between a right end face and a circumferential face of the probe is provided an annular groove, inside which the pressure sensor is fixedly mounted; and the sensing end of the pressure sensor is in contact with the annular metallic press-ring. ### Claim 17 (depends on 14) The dynamic tonometry device according to claim 14, wherein the light source is a light emitting diode. ### Claim 18 (depends on 15) The dynamic tonometry device according to claim 15, wherein the light source is a light emitting diode. ### Claim 19 (depends on 16) The dynamic tonometry device according to claim 16, wherein the light source is a light emitting diode. ### Claim 20 (depends on 17) The dynamic tonometry device according to claim 17, wherein the probe is made of glass or resin. ### Claim 21 (depends on 18) The dynamic tonometry device according to claim 18, wherein the probe is made of glass or resin. ### Claim 22 (depends on 19) The dynamic tonometry device according to claim 19, wherein the probe is made of glass or resin. ### Claim 23 (depends on 20) The dynamic tonometry device according to claim 20, further comprising a speaker which is fixedly mounted inside the housing and is connected with the microprocessor. ### Claim 24 (depends on 21) The dynamic tonometry device according to claim 21, further comprising a speaker which is fixedly mounted inside the housing and is connected with the microprocessor. ### Claim 25 (depends on 23) The dynamic tonometry device according to claim 23, wherein the light source is also provided on a left side with a wave filter. ### Claim 26 (depends on 24) The dynamic tonometry device according to claim 24, wherein the light source is also provided on its left side with a wave filter. ### Claim 27 (depends on 11) The dynamic tonometry device according to claim 11, further comprising a green optical filter which is fixedly disposed in a central axis of the probe and is located at a left side of the light source. ### Claim 28 (depends on 11) A method for controlling a coaxiality of a probe axis of the dynamic tonometry device, according to claim 11, with a longitudinal axis of an eyeball, comprising steps of: (a) turning on the power source to supply the dynamic tonometry device with electricity; (b) aligning perpendicularly the probe with a top of an eye cornea and aligning a central point of a left end face of the probe with an apex point of a dome-shaped cornea; (c) depressing slowly the probe, along with a gradual increase of applanation force, on the display storage being displayed a half-loop or loop applanation image; and (d) uniformizing a loop width of the half-loop or loop applanation image. ### Claim 29 (depends on 25) A method for controlling a coaxiality of a probe axis of the dynamic tonometry device, according to claim 25, with a longitudinal axis of an eyeball, comprising steps of: (a) turning on the power source to supply the dynamic tonometry device with electricity; (b) aligning perpendicularly the probe with a top of an eye cornea and aligning a central point of a left end face of the probe with an apex point of a dome-shaped cornea; (c) depressing slowly the probe, along with a gradual increase of applanation force, on the display storage being displayed a half-loop or loop applanation image; and (d) uniformizing a loop width of the half-loop or loop applanation image. ### Claim 30 (depends on 26) A method for controlling a coaxiality of a probe axis of the dynamic tonometry device, according to claim 26, with a longitudinal axis of an eyeball, comprising steps of: (a) turning on the power source to supply the dynamic tonometry device with electricity; (b) aligning perpendicularly the probe with a top of an eye cornea and aligning a central point of a left end face of the probe with an apex point of a dome-shaped cornea; (c) depressing slowly the probe, along with a gradual increase of applanation force, on the display storage being displayed a half-loop or loop applanation image; and (d) uniformizing a loop width of the half-loop or loop applanation image. ### Claim 31 (depends on 27) A method for controlling a coaxiality of a probe axis of the dynamic tonometry device, according to claim 27, with a longitudinal axis of an eyeball, comprising steps of: (a) turning on the power source to supply the dynamic tonometry device with electricity; (b) aligning perpendicularly the probe with a top of an eye cornea and aligning a central point of a left end face of the probe with an apex point of a dome-shaped cornea; (c) depressing slowly the probe, along with a gradual increase of applanation force, on the display storage being displayed a half-loop or loop applanation image; and (d) uniformizing a loop width of the half-loop or loop applanation image.