公开(公告)号：US20190167416A1

公开(公告)日：2019-06-06

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.

公开(公告)号：US20190328509A1

公开(公告)日：2019-10-31

申请号：US16467473

申请日：2016-12-07

Applicant: Kowa Company, Ltd.

Inventor： Haruo ISHIKAWA

IPC: A61F2/16 ,  G02C7/04 ,  G02C7/02

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.

公开(公告)号：US20230301775A1

公开(公告)日：2023-09-28

申请号：US18023704

申请日：2021-10-07

Applicant: KOWA COMPANY, LTD.

Inventor： Shuji ABE ,  Yasuhiro HISHINUMA ,  Kotaro MITSUMOTO ,  Haruo ISHIKAWA ,  Norio SHIMIZU

IPC: A61F2/16

CPC classification number: A61F2/1618 ,  A61F2/1654 ,  G02B27/4205

Abstract: A multifocal diffractive lens is provided which achieves efficient use of light. The multifocal diffractive lens 100 includes a diffraction grating 1c. Negative-order light L2 produces a focal point f2 for far vision and 0-order light L1 produces a focal point f1 nearer to that for far vision. The number of focal points is two or more. The focal position fc for far vision in polychromatic performance evaluation is located nearer to the multifocal diffractive lens than the focal position fs for far vision in monochromatic performance evaluation.

公开(公告)号：US20190091008A1

公开(公告)日：2019-03-28

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°.