# US 10,869,598 B2 · Eyeball optical measuring device and eyeball optical measuring method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,869,598 B2 - Document ID: US10869598B2 - Status: Granted - Kind: B2 - Application number: 15/723,314 - Filed: 2017-10-03 - Published: 2018-04-12 - Granted: 2020-12-22 - Earliest claimed: 2016-10-06 - Assignees: Fuji Xerox Co., Ltd. - Applicants: Fuji Xerox Co., Ltd. - Inventors: Hideaki Ozawa; Kazuyuki Matsushita; Kazutaka Takeda; Kouhei Yukawa; Taku Kinoshita; Hideo Nakayama - Web page: https://patentgrep.com/patent/US10869598B2 ## CPC - A61B 3/117: for examining the anterior chamber or the anterior chamber angle, e.g. gonioscopes - A61B 5/14507: {specially adapted for measuring characteristics of body fluids other than blood (devices for taking samples of body liquids A61B10/0045)} - A61B 5/14532: {for measuring glucose, e.g. by tissue impedance measurement} - A61B 5/1455: using optical sensors, e.g. spectral photometrical oximeters - A61B 5/6821: {Eye} - A61B 3/112: {for measuring diameter of pupils} - A61B 2562/0233: Special features of optical sensors or probes classified in A61B5/00 - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An eyeball optical measuring device includes: an optical measuring unit that irradiates an eyeball of a subject with measuring light to perform an optical measurement of the eyeball; and a light irradiation unit that irradiates the eyeball with irradiation light prior to the optical measurement by the optical measuring unit, the irradiation light having a lower energy density than an energy density of the measuring light. ## Claims ### Claim 1 An eyeball optical measuring device comprising: an optical measuring unit configured to irradiate an eyeball of a subject with measuring light to perform an optical measurement of the eyeball; and a light irradiation unit configured to irradiate the eyeball with irradiation light for making a pupil diameter of the eyeball smaller prior to the optical measurement by the optical measuring unit, the irradiation light having a lower energy density than an energy density of the measuring light, wherein the measuring light travels along an optical path in a direction intersecting another direction toward the fundus of the eyeball, the direction passing across an anterior chamber of the eyeball. ### Claim 2 (depends on 1) The eyeball optical measuring device according to claim 1, wherein the light irradiation unit irradiates the eyeball with the irradiation light at a timing that is prior to the optical measurement by the optical measuring unit and that ensures that a size of a pupil of the eyeball narrowed by the irradiation light does not return to a pre-irradiation size during the optical measurement. ### Claim 3 (depends on 1) The eyeball optical measuring device according to claim 1, further comprising a pupil diameter calculation unit configured to calculate a pupil diameter of the eyeball, wherein the optical measuring unit configured to perform the optical measurement of the eyeball if the pupil diameter calculated by the pupil diameter calculation unit becomes smaller than or equal to a predetermined value by being irradiated with the irradiation light from the light irradiation unit. ### Claim 4 (depends on 1) The eyeball optical measuring device according to claim 1, wherein the light irradiation unit irradiates the eyeball with the irradiation light during the optical measurement by the optical measuring unit. ### Claim 5 (depends on 1) The eyeball optical measuring device according to claim 1, wherein wavelengths of the measuring light and the irradiation light are different from each other. ### Claim 6 (depends on 5) The eyeball optical measuring device according to claim 5, wherein the optical measuring unit includes a wavelength cut filter that prevents the irradiation light from entering a light receiving unit for receiving the measuring light. ### Claim 7 An eyeball optical measuring method for optically measuring an eyeball of a subject, comprising: irradiating the eyeball with irradiation light that has a lower energy density than an energy density of measuring light used for the optical measurement; and irradiating the eyeball with the measuring light to optically measure the eyeball, wherein the measuring light travels along an optical path in a direction intersecting another direction toward the fundus of the eyeball, the direction passing across an anterior chamber of the eyeball. ### Claim 8 (depends on 7) The eyeball optical measuring method according to claim 7, further comprising: calculating a pupil diameter of the eyeball, wherein the eyeball is optically measured in response to the pupil diameter calculated becoming smaller than or equal to a predetermined value after being irradiated with the irradiation light. ### Claim 9 (depends on 1) The eyeball optical measuring device according to claim 1, wherein the measuring light is directed into the eyeball at an angle different than the irradiation light. ### Claim 10 (depends on 7) The eyeball optical measuring method according to claim 7, wherein the measuring light is directed into the eyeball at an angle different than the irradiation light. ### Claim 11 (depends on 1) The eyeball optical measuring device according to claim 1, wherein the optical measuring unit configured to irradiates the measuring light to measure an optical rotation angle. ### Claim 12 (depends on 7) The eyeball optical measuring method according to claim 7, wherein the measuring light is irradiated in a manner to measure an optical rotation angle. ### Claim 13 (depends on 1) The eyeball optical measuring device according to claim 1, wherein the irradiation unit is a liquid crystal display. ### Claim 14 (depends on 13) The eyeball optical measuring device according to claim 13, wherein the liquid crystal display is configured to display a mark to guide the direction of the eyeball. ### Claim 15 (depends on 1) The eyeball optical measuring device according to claim 1, wherein the irradiation unit is a LED. ### Claim 16 (depends on 1) The eyeball optical measuring device according to claim 1, wherein the measuring light travels along an optical path that passes across an anterior chamber of the eyeball from one of an internal canthus side of the anterior chamber and an external canthus side of the anterior chamber toward the other of the internal canthus side and the external canthus side.