# US 2025/0082201 A1 · Slit-lamp microscope and ophthalmic system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0082201 A1 - Document ID: US20250082201A1 - Status: Published application - Kind: A1 - Application number: 18/957,935 - Filed: 2024-11-25 - Published: 2025-03-13 - Earliest claimed: 2018-03-14 - Assignees: Topcon Corporation - Applicants: Topcon Corporation - Inventors: Kazuhiro OHMORI; Yasufumi FUKUMA; Satoshi YAMAMOTO - Web page: https://patentgrep.com/patent/US20250082201A1 ## CPC - A61B 3/135: Slit-lamp microscopes - A61B 3/0008: {provided with illuminating means (A61B3/117, A61B3/14 take precedence)} - A61B 3/0025: {characterised by electronic signal processing, e.g. eye models} - A61B 3/0091: {Fixation targets for viewing direction} - A61B 3/10: Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions - A61B 3/14: Arrangements specially adapted for eye photography - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A slit lamp microscope of an aspect example includes an illumination system, first photographing system, fixation system, movement mechanism, and controller. The illumination system projects slit light onto an anterior segment of a subject's eye from a first direction. The first photographing system photographs the anterior segment onto which the slit light is being projected, from a second direction different from the first direction. The fixation system outputs fixation light for fixation of the subject's eye. The movement mechanism moves the illumination system and the first photographing system, the controller performs a first control for the movement mechanism to move at least the illumination system and a second control for the first photographing system to photograph the anterior segment a plurality of times in parallel with each other while causing the fixation system to output the fixation light. ## Claims ### Claim 1 An ophthalmic system comprising a slit lamp microscope and an information processing apparatus connected via a communication path, wherein the slit lamp microscope includes: an illumination system including an illumination light source and configured to project slit light onto an anterior segment of a subject's eye from a first direction; a first photographing system including a lens and configured to photograph the anterior segment onto which the slit light is being projected, from a second direction different from the first direction; a second photographing system configured to photograph the anterior segment; a fixation system including a fixation light source and configured to output fixation light for fixation of the subject's eye; a movement mechanism including an actuator and configured to be capable of moving the illumination system and the first photographing system; a controller circuit configured to perform a first control for the movement mechanism to move at least the illumination system, a second control for the first photographing system to photograph the anterior segment a plurality of times in parallel with each other while causing the fixation system to output the fixation light, and a third control for the second photographing system to photograph the anterior segment a plurality of times in parallel with the first control and the second control; and a transmitter configured to transmit a plurality of images acquired by the first photographing system under the second control to the information processing apparatus via the communication path, and the information processing apparatus includes: a receiver configured to receive the plurality of images transmitted by the transmitter, and a three dimensional image construction circuit configured to construct a three dimensional image based on the plurality of images received by the receiver. ### Claim 2 (depends on 1) The ophthalmic system of claim 1, wherein the controller circuit performs the first control to move the illumination system and the first photographing system together with each other. ### Claim 3 (depends on 1) The ophthalmic system of claim 1, wherein the movement mechanism is capable of moving the illumination system and the first photographing system independently of each other. ### Claim 4 (depends on 1) The ophthalmic system of claim 1, wherein the slit lamp microscope further includes a memory that stores, in advance, initial position information in which an initial position of the illumination system and an initial position of the first photographing system are recorded, and the controller circuit controls the movement mechanism based on the initial position information to place the illumination system and the first photographing system at respective initial positions. ### Claim 5 (depends on 1) The ophthalmic system of claim 1, wherein the movement mechanism is capable of changing at least a movement direction of the illumination system under the first control. ### Claim 6 (depends on 5) The ophthalmic system of claim 5, wherein the slit lamp microscope further includes an orientation changing circuit configured to change an orientation of the slit light projected by the illumination system, and at least the movement direction of the illumination system under the first control is a width direction of a cross section of the slit light. ### Claim 7 (depends on 1) The ophthalmic system of claim 1, wherein the controller circuit performs association between the plurality of images acquired by the first photographing system under the second control and a plurality of images acquired by the second photographing system under the third control. ### Claim 8 (depends on 7) The ophthalmic system of claim 7, wherein the transmitter transmits the plurality of images acquired by the first photographing system under the second control, the plurality of images acquired by the second photographing system under the third control, and correspondence relationship obtained by the association.