公开(公告)号：US10881294B2

公开(公告)日：2021-01-05

申请号：US16132507

申请日：2018-09-17

Applicant: TOPCON CORPORATION

Inventor： Kouta Fujii ,  Makoto Saika ,  Jun Sakai

IPC: A61B3/10 ,  A61B3/12 ,  A61B3/00 ,  A61B3/14

Abstract: An ophthalmic apparatus of an embodiment include a data acquisition device, distribution data generator, correction value calculator, magnification corrector, and data comparator. The data acquisition device acquires three dimensional data by applying OCT to the fundus of a subject's eye. The distribution data generator generates distribution data of a predetermined measurement value in the fundus based on the three dimensional data. The correction value calculator calculates a magnification correction value based on a predetermined condition for acquiring the three dimensional data. The magnification corrector changes at least one of the size of standard distribution data generated in advance for the predetermined measurement value and the size of the distribution data, based on the magnification correction value. The data comparator compares the distribution data with the standard distribution data, at least one of whose sizes has been changed by the magnification corrector.

公开(公告)号：US12220171B2

公开(公告)日：2025-02-11

申请号：US17665586

申请日：2022-02-06

Applicant: Topcon Corporation

Inventor： Yoko Tatara ,  Suguru Miyagawa ,  Tatsuo Yamaguchi ,  Makoto Saika

IPC: A61B3/00 ,  A61B3/02 ,  A61B3/028 ,  A61B3/10 ,  A61B3/103 ,  A61B3/12 ,  A61B3/15

Abstract: The ophthalmologic device to be coupled to a correcting device for correcting subject eyes, the correcting device including a right-left pair of two examination windows and a right-left pair of arrangement mechanisms that each arrange first optical elements, includes: a coupling member configured to be detachably coupled to each of coupled members provided on a side surface of the correcting device on a side opposite to an eyepiece side for each subject eye; a second optical element arranged at a position facing a second examination window opposite to a first examination window which is an eyepiece window, when the coupling member is coupled to the coupled member, the second optical element configured to branch a second optical path from a first optical path along the optical axes; and an objective measuring system arranged on the second optical path and configured to acquire ocular characteristics of each subject eye.

公开(公告)号：US11363948B2

公开(公告)日：2022-06-21

申请号：US16691882

申请日：2019-11-22

Applicant: OSAKA UNIVERSITY ,  TOPCON CORPORATION

Inventor： Takashi Fujikado ,  Yoko Hirohara ,  Makoto Saika ,  Suguru Miyagawa

IPC: A61B3/103 ,  A61B3/00 ,  A61B3/10 ,  A61B3/18

Abstract: An ophthalmologic device includes: a visual target presenting unit configured to present a common visual target to be viewed with both subject's eyes; a presenting distance changing unit configured to change a presenting distance of the visual target presented by the visual target presenting unit from a predetermined far vision distance to a predetermined near vision distance; an ocular characteristic acquiring unit configured to objectively acquire an optical characteristic of the subject's eyes; an addition power adding unit configured to add the addition power to the both subject's eyes; and a control unit configured to cause the presenting distance changing unit to change the presenting distance and the ocular characteristic acquiring unit to continuously acquire the optical characteristic, in a state in which an addition power is added to the both subject's eyes by the addition power adding unit.

公开(公告)号：US11185221B2

公开(公告)日：2021-11-30

申请号：US16540085

申请日：2019-08-14

Applicant: TOPCON CORPORATION

Inventor： Makoto Saika ,  Tsutomu Kikawa

IPC: A61B3/10 ,  A61B3/12 ,  A61B3/15 ,  A61B3/103 ,  A61B3/14

Abstract: An ophthalmologic apparatus includes an OCT measurement unit, a corneal shape measurement unit, an eyeball model generator, and a site specifying unit. The OCT measurement unit is configured to acquire data of a subject's eye by deflecting measurement light using an optical scanner to project onto the subject's eye and detecting interference light between returning light of the measurement light from the subject's eye and reference light. The corneal shape measurement unit is configured to obtain curvature radius distribution on a cornea by detecting returning light of a measurement pattern projected onto a cornea of the subject's eye. The eyeball model generator is configured to generate an eyeball model using the curvature radius distribution on the cornea. The site specifying unit is configured to specify a traveling direction of the measurement light by performing ray tracing on the measurement light incident on each of a plurality of incident positions on the cornea based on a scan angle and the eyeball model, and to specify a position corresponding to an intraocular site of the subject's eye in the traveling direction based on the data acquired using the measurement light.

公开(公告)号：US11013400B2

公开(公告)日：2021-05-25

申请号：US16139195

申请日：2018-09-24

Applicant: TOPCON CORPORATION

Inventor： Kouta Fujii ,  Makoto Saika ,  Jun Sakai

IPC: A61B3/12 ,  A61B3/10 ,  A61B3/00 ,  A61B3/14 ,  G01B9/02

Abstract: An ophthalmic apparatus of an exemplary embodiment is capable of applying OCT to the fundus of a subject's eye, and includes an optical system, an optical scanner, an optical path length changing device, and a controller. The optical system splits light output front a light source into measurement light and reference light, projects the measurement light onto the fundus, generates interference light by superposing returning light of the measurement light from the subject's eye on the reference light, and detects the interference light. The optical scanner deflects the measurement light for scanning the fundus. The optical path length changing device changes at least one of an optical path length of the measurement light and an optical path length of the reference light. The controller controls the optical scanner based on at least the optical path length.

公开(公告)号：US11089956B2

公开(公告)日：2021-08-17

申请号：US16129839

申请日：2018-09-13

Applicant: TOPCON CORPORATION

Inventor： Makoto Saika

IPC: A61B3/117 ,  A61B3/113 ,  A61B3/00 ,  A61B3/14 ,  A61B3/107 ,  A61B3/11 ,  A61B3/12 ,  A61B3/10

Abstract: An ophthalmologic apparatus is configured to control an optical scanner so as to perform a scan by measurement light in an intersecting direction which intersects a traveling direction of the measurement light, to specify a scan length based on a detection result of interference light corresponding to the scan, the detection result being acquired by an interference optical system, the scan length being a length of a scan range in the intersecting direction within a characteristic region in an anterior segment of the subject's eye, and to specify a movement amount of the subject's eye based on a reference value of the characteristic region and the scan length.

公开(公告)号：US10959615B2

公开(公告)日：2021-03-30

申请号：US16085595

申请日：2017-02-20

Applicant: OSAKA UNIVERSITY ,  TOPCON CORPORATION

Inventor： Takashi Fujikado ,  Masakazu Hirota ,  Kohji Nishida ,  Makoto Saika ,  Tatsuo Yamaguchi ,  Suguru Miyagawa

IPC: A61B3/113 ,  A61B3/10 ,  A61B3/08 ,  A61B3/00

Abstract: An eye-fatigue examining device and an eye-fatigue examining method capable of examining eye fatigue of a subject's eye regardless of an age of a patient are provided. The eye-fatigue examining device includes: a light quantity difference adjusting unit that increases a light quantity difference between lights respectively incident on right and left subject's eyes; a gaze direction detecting unit that detects gaze directions of the respective subject's eyes while the light quantity difference adjusting unit increases the light quantity difference; and a light quantity difference deciding unit that decides a specific light quantity difference at which a change in the gaze directions due to the increase in the light quantity difference occurs, based on the detection result of the gaze direction detecting unit.

公开(公告)号：US10182721B2

公开(公告)日：2019-01-22

申请号：US15202963

申请日：2016-07-06

Applicant: TOPCON CORPORATION

Inventor： Akemi Miwa ,  Tatsuo Yamaguchi ,  Makoto Saika

IPC: A61B3/14 ,  A61B3/12 ,  A61B3/10 ,  G02B6/06 ,  G02B21/00

Abstract: According to one embodiment, a fundus imaging apparatus includes a light source, an optical scanner, an optical fiber, a light guide system, a photodetector unit, and an image forming unit. The optical scanner scans the fundus of a subject's eye with light from the light source. The optical fiber includes a plurality of optical waveguides. The light guide system guides the light returning from the fundus to the entrance end of the optical fiber. The photodetector unit detects light output from each of at least three regions at the exit end of the optical fiber. The image forming unit forms a first image based on a detection result of light output from a first region of the at least three regions, and a second image based on detection results of light output from two or more regions of the at least three regions other than the first region.