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公开(公告)号：EP3329880B1
公开(公告)日：2020-07-29
申请号：EP16830223.0
申请日：2016-06-29
发明人： ICHIKAWA, Kazuo , YOSHIDA, Norihiko
IPC分类号： A61F2/16
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公开(公告)号：EP3847983A1
公开(公告)日：2021-07-14
申请号：EP20217629.3
申请日：2020-12-29
发明人： ICHIKAWA, Kazuo
摘要： Provided is an ophthalmic instrument that is for retaining a tube member for providing communication between the inside and the outside of an eyeball, such that the tube member is stuck into an outer membrane of the eyeball and that is suitable for retaining the tube member at an outer peripheral portion of a cornea.
An ophthalmic instrument 1 includes a main body 2 and a needle portion 6 connected to one end side of the main body 2. The main body 2 has a straight portion 3 extending in a straight manner, and a bent portion 4 extending in a direction different from that of the straight portion 3. The needle portion 6 is connected to a tip end 5 of the bent portion 4 and has a shape extending in a straight manner in the same direction as that of the bent portion 4. When attaching a tube member to an eyeball, first, the needle portion 6 is inserted through the tube member, and the tube member is stuck into an outer peripheral portion of a cornea as the outer membrane of the eyeball while a hole is made in the outer peripheral portion of the cornea with the needle portion 6. Thereafter, the instrument 1 is pulled out, thereby retaining the tube member at the outer peripheral portion of the cornea.-
3.发明公开
公开(公告)号：EP3838114A1
公开(公告)日：2021-06-23
申请号：EP20215153.6
申请日：2020-12-17
发明人： MAJIMA, Kiyoyuki , ICHIKAWA, Kazuo , ICHIKAWA, Kei
摘要： Provided are a method, a device, or a program for easily determining a crystalline lens nucleus state.
A gray scale anterior segment image taken by optical coherence tomography is obtained (S21), and posterization of the anterior segment image is performed to obtain tone-changed images having 3 tones, 4 tones, and 5 tones (S22). One, of a plurality of predetermined grades, corresponding to the crystalline lens nucleus state is determined based on a combination of states of observed images of the crystalline lens nucleus in the tone-changed images (S23). The grades are set for classification according to whether or not an image of a crystalline lens nucleus is observed, whether the observed image is spot-shaped or band-shaped, or whether or not the entire image of the crystalline lens nucleus is observed.-
公开(公告)号：EP3417764A1
公开(公告)日：2018-12-26
申请号：EP18176704.7
申请日：2018-06-08
发明人： ICHIKAWA, Kazuo , SATO, Hiroyuki , TANAKA, Yoshiki
摘要： Provided are an apparatus and a method, for testing a visual function of a subject, that make it possible to appropriately test the sensitivity for each color for each region of a visual field. In a state in which the subject is caused to gaze at one point 6 in a background 7, a visual target 5 for testing a color-related visual function of the subject is displayed in a peripheral region of the gaze point 6 such that the luminance of the background 7 has a numerical value included between a numerical value smaller by 10% and a numerical value greater by 10% than the luminance of the visual target 5. Then, for each measurement point 300, a threshold that is a size of the visual target 5 that determines whether or not the subject can perceive the visual target 5 is obtained for a plurality of times.
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公开(公告)号：EP4094700A1
公开(公告)日：2022-11-30
申请号：EP22173495.7
申请日：2022-05-16
发明人： ICHIKAWA, Kazuo , TODA, Hiroto
摘要： Provided is an eyeball attachment tube that is temporarily attached to an outer membrane of an eyeball in ophthalmic surgery for communication between the inside and the outside of the eyeball such that the eyeball attachment tube is inhibited from becoming unstable when attached in a direction deviating from a direction perpendicular to the external surface of the eyeball.
An eyeball attachment tube 1 includes: a tubular portion 2 configured to be in a state of puncturing an outer membrane when the eyeball attachment tube 1 is attached to the outer membrane; and a large diameter portion 3 which is disposed on a proximal end side of the tubular portion 2, has an outer diameter larger than that of the tubular portion 2, and is exposed externally from the outer membrane when the eyeball attachment tube 1 is attached to the outer membrane. An end portion 31 of the large diameter portion 3 on the tubular portion 2 side is shaped so as to have a height difference in the direction parallel to a center axis L1 between one end 31a and another end 31b in the direction perpendicular to the center axis L1 of the tubular portion 2. Specifically, the end portion 31 is formed as a plane inclined relative to the center axis L1 of the tubular portion 2. A proximal end 32 of the large diameter portion 3 is formed as a plane perpendicular to the center axis L1.-
公开(公告)号：EP3875066A1
公开(公告)日：2021-09-08
申请号：EP21160059.8
申请日：2021-03-01
发明人： ICHIKAWA, Kazuo , TODA, Hiroto
IPC分类号： A61F9/007
摘要： Provided is an ophthalmic surgery instrument that is capable of simplifying the structure of a rod-shaped portion, which is inserted into an eyeball during ophthalmic surgery, and that is suitable for excising a to-be-excised part of the eyeball.
The ophthalmic surgery instrument includes a rod-shaped portion 2 that is inserted into an eyeball during ophthalmic surgery, and a grip portion that is connected to a base end portion of the rod-shaped portion 2. The rod-shaped portion 2 has a single passage 5 formed therein so as to penetrate from one end portion thereof to another end portion thereof. A bent portion 7 is formed at a tip end of the rod-shaped portion 2. An angle θ2 of the bent portion 7 with respect to an extension line 103 of a contour line 102 extending in a direction of an axis 100 of the rod-shaped portion 2 is larger than 90 degrees. A tip end opening portion 6 of the passage 5 is formed so as to be inclined relative to the axis 100 of the rod-shaped portion 2. A liquid is caused to flow through the passage 5 to flow out from the tip end opening portion 6 or a to-be-excised part is sucked through the passage 5 while excising the to-be-excised part with the bent portion 7.-
公开(公告)号：EP3417764B1
公开(公告)日：2019-10-30
申请号：EP18176704.7
申请日：2018-06-08
发明人： ICHIKAWA, Kazuo , SATO, Hiroyuki , TANAKA, Yoshiki
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公开(公告)号：EP4137036A1
公开(公告)日：2023-02-22
申请号：EP22189664.0
申请日：2022-08-10
发明人： ICHIKAWA, Kazuo , YOKOYAMA, Sho , TANAKA, Yoshiki
IPC分类号： A61B3/06
摘要： Provided is a visual target display device or a visual target presentation method which can test the cone-specific visual function more accurately in a device that displays a visual target, of a chromatic color, for testing the color-related visual function of a subject or a method of presenting the visual target.
A visual target 8, of a chromatic color, for testing the color-related visual function of a subject and a background 9 around the visual target 8 are presented in such a way that the brightness of the background 9 is a numerical value between a numerical value 10% less than the brightness of the visual target 8 and a numerical value 10% greater than the brightness of the visual target 8 and a combination of the color of the visual target 8 and the color of the background 9 is a combination of colors which are in a relationship of confusion colors in dichromatism. The color of the background 9 is set to a chromatic color, for example. For example, the color of the visual target 8 and the color of the background 9 are set to chromatic colors located on opposite sides of a region of an achromatic color on the same confusion color locus passing through the region of the achromatic color in a chromaticity diagram. The color of the visual target 8 and the color of the background 9 are set to colors of the same chroma, for example.-
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公开(公告)号：EP3329880A1
公开(公告)日：2018-06-06
申请号：EP16830223.0
申请日：2016-06-29
发明人： ICHIKAWA, Kazuo , YOSHIDA, Norihiko
IPC分类号： A61F2/16
CPC分类号： A61F2/16 , A61F2/1608 , A61F2/1629 , A61F2/1664 , A61F2002/1681 , A61F2002/1682 , A61F2002/16903 , A61F2002/1699 , A61F2220/0016
摘要： In an eye of a patient, ciliary processes 21 project from a ciliary body 20 located in a circumferential direction about a visual axis C, toward the visual axis C. A hook portion 4 is provided which is formed so as to extend from base portions 21a of the ciliary processes 21 along the outer surfaces of the ciliary processes 21 via anterior end portions 21b of the ciliary processes 21 to base portions 21c at the opposite side. A leg portion 3 extending from the hook portion 4 toward the visual axis C is connected to the hook portion 4, and a lens 2 to be mounted in the eye of the patient is supported by the leg portion 3. The lens 2 is held in the eye of the patient in a state where the hook portion 4 is hooked or fitted to the ciliary processes 21. Accordingly, an intraocularly-mounted object and an intraocularly-mounted object holding member that are allowed to move directly in conjunction with relaxation/contraction movement of ciliary muscle, are provided.
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