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公开(公告)号：US20220244568A1
公开(公告)日：2022-08-04
申请号：US17659401
申请日：2022-04-15
Applicant: KOWA COMPANY, LTD.
Inventor： Haruo Ishikawa
Abstract: An ophthalmic lens has a cross-sectional shape in an arbitrary meridian direction on a lens surface of the ophthalmic lens. The cross-sectional shape is expressed by the following formula (1), Z = c r 2 1 + [ 1 - c 2 r 2 ( k + 1 ) ] 1 / 2 + A ( θ ) r 2 + B ( θ ) r 4 . In the formula, c is a paraxial curvature of the ophthalmic lens, r is a distance from a lens center of the ophthalmic lens, k is a conic constant of a surface which is in rotation symmetry with respect to an optical axis of the lens in the ophthalmic lens. The variables c, r and k are used in common in the meridian direction on the lens surface, and A(θ) and B(θ) are parameters expressed by functions depending on an angle in the meridian direction.
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公开(公告)号：US20160331522A1
公开(公告)日：2016-11-17
申请号：US15111158
申请日：2015-01-16
Applicant: KOWA COMPANY, LTD.
Inventor： Kimiya Shimizu , Haruo Ishikawa
CPC classification number: A61F2/1645 , G02C7/02 , G02C7/022 , G02C7/04 , G02C2202/06
Abstract: A tonic ophthalmic lens is described in which refractivity of the lens differs between a first direction on a plane perpendicular to an optical axis of the lens and a second direction which differs from the first direction on the plane. In addition, refractivity difference which is the difference between the refractivity in the first direction and the refractivity in the second direction varies depending on a position of the lens in a radial direction.
Abstract translation: 描述了一种矫正眼科镜片，其中透镜的折射率在垂直于透镜的光轴的平面上的第一方向与不同于平面上的第一方向的第二方向不同。 此外，作为第一方向的折射率与第二方向的折射率的差的折射率差根据透镜在径向的位置而变化。
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公开(公告)号：US11622851B2
公开(公告)日：2023-04-11
申请号：US16309903
申请日：2017-06-14
Applicant: Kowa Company, Ltd.
Inventor： Haruo Ishikawa , Akemi Taniguchi , Norio Shimizu
IPC: A61F2/16
Abstract: There is provided a toric intraocular lens which improves the visibility of a toric axis. The toric intraocular lens is a toric intraocular lens including a lens body provided with an astigmatic axis. A mark indicating the astigmatic axis is formed at an optical surface of an outer rim portion of the lens body, and a length in a radial direction of the lens body and a length in a circumferential direction of the lens body of external dimensions of the mark are different from each other in top view of the optical surface.
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Patent Agency Ranking
公开(公告)号：US20210063768A1
公开(公告)日：2021-03-04
申请号：US17096718
申请日：2020-11-12
Applicant: KOWA COMPANY, LTD.
Inventor： Haruo Ishikawa
Abstract: An ophthalmic lens has a cross-sectional shape in an arbitrary meridian direction on a lens surface of the ophthalmic lens. The cross-sectional shape is expressed by the following formula (1), Z = c r 2 1 + [ 1 - c 2 r 2 ( k + 1 ) ] 1 / 2 + A ( θ ) r 2 + B ( θ ) r 4 . In the formula, c is a paraxial curvature of the ophthalmic lens, r is a distance from a lens center of the ophthalmic lens, k is a conic constant of a surface which is in rotation symmetry with respect to an optical axis of the lens in the ophthalmic lens. The variables c, r and k are used in common in the meridian direction on the lens surface, and A(θ) and B(θ) are parameters expressed by functions depending on an angle in the meridian direction.
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公开(公告)号：US11366336B2
公开(公告)日：2022-06-21
申请号：US16467473
申请日：2017-12-06
Applicant: Kowa Company, Ltd.
Inventor： Haruo Ishikawa
Abstract: To realize a toric ophthalmic lens including an edge that makes it possible to design a lens contributing to secondary cataract prevention without deteriorating a degree of freedom of lens design. The toric ophthalmic lens is a toric ophthalmic lens in which, in a top view of an optical portion, a substantially flat portion having a substantially fixed edge thickness of the optical portion is provided to overlap a steep meridian of a toric surface of the optical portion.
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公开(公告)号：US10856969B2
公开(公告)日：2020-12-08
申请号：US16092188
申请日：2017-04-07
Applicant: Kowa Company, Ltd.
Inventor： Haruo Ishikawa
IPC: A61F2/16
Abstract: A toric intraocular lens includes a lens body, support portions, and connecting portions for connecting the lens body and the support portions. The lens is housed in an insertion apparatus that includes a tubular apparatus body having an insertion tube for the lens and a plunger for moving the lens. Each of the connecting portions is arranged at a position where the connecting portions face each other across a center of an optical axis of the lens body. One end of the flat meridian of the lens body is located at a position opposite to a position, with respect to an axis that passes through the center and connects the connecting portions, at which the plunger contacts the lens body. An angle between the flat meridian and an axis along which the lens is pushed by the plunger is larger than 0° and equal to or smaller than 90°.
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公开(公告)号：US20170045756A1
公开(公告)日：2017-02-16
申请号：US15125097
申请日：2015-01-28
Applicant: KOWA COMPANY, LTD.
Inventor： Haruo Ishikawa
CPC classification number: G02C7/028 , A61F2/16 , A61F2/1637 , A61F2/1645 , G02B3/06 , G02C7/02 , G02C7/022 , G02C7/024 , G02C7/04 , G02C2202/22
Abstract: It is provided with an ophthalmic lens having a cross-sectional shape in an arbitrary meridian direction on a lens surface of the ophthalmic lens. The cross-sectional shape is expressed by the following formula (1), Z = cr 2 1 + [ 1 - c 2 r 2 ( k + 1 ) ] 1 / 2 + A ( θ ) r 2 + B ( θ ) r 4 (1) wherein c is a paraxial curvature of the ophthalmic lens, r is a distance from a lens center of the ophthalmic lens, k is a conic constant of a surface which is in rotation symmetry with respect to an optical axis of the lens in the ophthalmic lens, c, r and k are used in common in the meridian direction on the lens surface, and A(θ) and B(θ) are parameters expressed by functions depending on an angle in the meridian direction.
Abstract translation: 在眼镜片的镜片表面设置有在任意子午线方向上具有横截面形状的眼科镜片。 横截面形状由以下Z = cr 2 1 + 1'c 2 r 2 k + 1½+ A¸r 2 + B¸r 4（1）表示，其中c是眼镜片的近轴曲率 r是距离眼镜片的透镜中心的距离，k是相对于眼镜片中的透镜的光轴旋转对称的表面的圆锥常数，c，r和k被共同使用 在透镜表面的子午线方向上，A（¸）和B（¸）是根据子午线方向上的角度的函数表示的参数。
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公开(公告)号：US10646328B2
公开(公告)日：2020-05-12
申请号：US15111158
申请日：2015-01-16
Applicant: KOWA COMPANY, LTD.
Inventor： Kimiya Shimizu , Haruo Ishikawa
Abstract: A tonic ophthalmic lens is described in which refractivity of the lens differs between a first direction on a plane perpendicular to an optical axis of the lens and a second direction which differs from the first direction on the plane. In addition, refractivity difference which is the difference between the refractivity in the first direction and the refractivity in the second direction varies depending on a position of the lens in a radial direction.
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