Patents by Inventor Tsutomu Sunada

Tsutomu Sunada has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20120197102
    Abstract: An ophthalmic surgical microscope comprises: an observation optical system for observing a patient's eye during surgery; a corneal shape measuring unit for measuring a corneal shape of the patient's eye placed in a surgical position; and a controller configured to output guide information for guiding a surgery with an intraocular lens based on a measurement result obtained by the corneal shape measuring unit to an output device.
    Type: Application
    Filed: January 26, 2012
    Publication date: August 2, 2012
    Applicant: NIDEK CO., LTD.
    Inventors: Masaaki HANEBUCHI, Michihiro TAKII, Masakazu ENDO, Tsutomu SUNADA
  • Patent number: 7276080
    Abstract: An intraocular lens for amblyopia designed in consideration of normalizing vision as well as magnifying vision, is provided with an optical part having predetermined refractive power, which includes front and rear side refractive surfaces, a supporting part for supporting the optical part within the eye, a first reflecting part formed at a rear surface side of the optical part for reflecting an incident light bundle, which has passed through the front surface of the optical part, toward the front surface, and a second reflecting part formed at a front surface side of the optical part for reflecting the incident light bundle, which has been reflected by the first one, toward the rear surface, wherein the first and second reflecting parts form a reflecting telescopic system which forms a magnified image on a retina, and at least one of them has a property of transmitting a part of the light bundle.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: October 2, 2007
    Assignee: Nidek Co. Ltd.
    Inventors: Naho Murakami, Yoshihiro Nakahata, Tsutomu Sunada
  • Patent number: 7232896
    Abstract: A colorant for ocular lenses represented by the formula (I) defined herein or a colorant for ocular lenses represented by the formula (II) defined herein.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: June 19, 2007
    Assignee: Nidek Co., Ltd.
    Inventors: Sadao Miki, Masaki Kuwahara, Yoshihiro Nakahata, Tsutomu Sunada
  • Patent number: 7160488
    Abstract: A method of manufacturing an intraocular lens includes: a first step of producing a base material for the intraocular lens by polymerizing a first polymerizable monomer which is a raw material of the base material; a second step of producing a monomer-impregnated base material by impregnating the base material produced in the first step with a second polymerizable monomer; a third step of setting a protective member on a surface of the base material produced in the second step to prevent the surface of the base material from drying; and a fourth step of polymerizing the second polymerizable monomer impregnated in the base material on which the protective member is set.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: January 9, 2007
    Assignee: Nidek Co., Ltd.
    Inventors: Ken Ichikawa, Yoshihiro Nakahata, Tsutomu Sunada
  • Publication number: 20060271063
    Abstract: An intraocular lens injector for injecting a foldable intraocular lens in an aye, comprises: a substantially cylindrical main unit including a substantially cylindrical insertion part which is insertable through an incision made in the eye, the main unit being adapted to internally hold the intraocular lens and release the intraocular lens to the outside of the injector through the insertion part; a push unit inserted in the main unit to push the intraocular lens to the outside through the insertion part, the push unit being disposed to be unrotatable relative to the main unit but movable in an axial direction of the main unit; and a rotatable member disposed to be rotatable relative to the main unit.
    Type: Application
    Filed: May 30, 2006
    Publication date: November 30, 2006
    Applicant: NIDEK CO., LTD.
    Inventors: Tsutomu Sunada, Shinji Nagasaka, Haruo Oda
  • Publication number: 20060265059
    Abstract: An intraocular lens capable of obtaining favorable accommodative power, which is to be arranged inside a lens capsule as a replacement for a crystalline lens, includes a front-side and rear-side optical parts having predetermined refractive power and an elastic part having predetermined elasticity by containing water to swell, wherein the elastic part is bonded to the optical parts so that optical axes of the optical parts coincide and so that the elastic part does not cover their optical zones, an elastic part thickness before containing water is determined so that an intraocular lens thickness after containing water completely to swell corresponds to a crystalline lens thickness at near vision, and a distance between the rear surface of the front-side optical part and the front surface of the rear-side optical part of the intraocular lens arranged inside the lens capsule is changed according to relaxation and tension of a ciliary muscle.
    Type: Application
    Filed: April 28, 2006
    Publication date: November 23, 2006
    Applicant: NIDEK CO. LTD.
    Inventors: Tsutomu Sunada, Kyoko Miura, Yoshihiro Nakahata
  • Publication number: 20060096044
    Abstract: A colorant for ocular lenses represented by the formula (I) defined herein or a colorant for ocular lenses represented by the formula (II) defined herein.
    Type: Application
    Filed: November 10, 2005
    Publication date: May 11, 2006
    Inventors: Sadao Miki, Masaki Kuwahara, Yoshihiro Nakahata, Tsutomu Sunada
  • Publication number: 20050027355
    Abstract: An intraocular lens for amblyopia designed in consideration of normalizing vision as well as magnifying vision, is provided with an optical part having predetermined refractive power, which includes front and rear side refractive surfaces, a supporting part for supporting the optical part within the eye, a first reflecting part formed at a rear surface side of the optical part for reflecting an incident light bundle, which has passed through the front surface of the optical part, toward the front surface, and a second reflecting part formed at a front surface side of the optical part for reflecting the incident light bundle, which has been reflected by the first one, toward the rear surface, wherein the first and second reflecting parts form a reflecting telescopic system which forms a magnified image on a retina, and at least one of them has a property of transmitting a part of the light bundle.
    Type: Application
    Filed: July 28, 2004
    Publication date: February 3, 2005
    Inventors: Naho Murakami, Yoshihiro Nakahata, Tsutomu Sunada
  • Publication number: 20040041289
    Abstract: A method of manufacturing an intraocular lens includes: a first step of producing a base material for the intraocular lens by polymerizing a first polymerizable monomer which is a raw material of the base material; a second step of producing a monomer-impregnated base material by impregnating the base material produced in the first step with a second polymerizable monomer; a third step of setting a protective member on a surface of the base material produced in the second step to prevent the surface of the base material from drying; and a fourth step of polymerizing the second polymerizable monomer impregnated in the base material on which the protective member is set.
    Type: Application
    Filed: August 25, 2003
    Publication date: March 4, 2004
    Applicant: NIDEK CO., LTD.
    Inventors: Ken Ichikawa, Yoshihiro Nakahata, Tsutomu Sunada
  • Patent number: 6699284
    Abstract: An intraocular lens to be placed in an anterior chamber of a patient's eye is disclosed. The intraocular lens includes a lens part with a predetermined refractive power, including a front lens surface facing toward a cornea side and a back lens surface facing toward a fundus side when the intraocular lens is placed in the anterior chamber, a support part provided in an edge of the lens part and with an end positioned opposite to the edge, the end being insertable into an iris to penetrate to a fundus side thereof and back to a cornea side thereof to hold the lens part in the anterior chamber, and a hook provided in the end of the support part for preventing the support part from coming off the iris.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: March 2, 2004
    Assignee: Nidek Co., Ltd.
    Inventor: Tsutomu Sunada
  • Publication number: 20030009216
    Abstract: An intraocular lens (1) to be placed in an anterior chamber of a patient's eye is disclosed. The intraocular lens includes: a lens part (2) with a predetermined refractive power, including a front lens surface (2a) facing toward a cornea side and a back lens surface (2b) facing toward a fundus side when the intraocular lens is placed in the anterior chamber; a support part (3) provided in an edge of the lens part (2) and with an end positioned opposite to the edge, the end being insertable into an iris to penetrate to a fundus side thereof and back to a cornea side thereof to hold the lens part (2) in the anterior chamber; and a hook (30) provided in the end of the support part (3) for preventing the support part from coming off the iris.
    Type: Application
    Filed: July 1, 2002
    Publication date: January 9, 2003
    Applicant: NIDEK CO., LTD.
    Inventor: Tsutomu Sunada
  • Patent number: 6096846
    Abstract: An ultraviolet absorbing base material is disclosed in which a vinyl copolymerizable monomer and a benzotriazole ultraviolet absorbing monomer represented by formula (I) or (II) are copolymerized: ##STR1## wherein X represents H or a halogen, R.sub.1 is H or an alkyl group having 1 to 6 carbon atoms, R.sub.2 and R.sub.3 each represents a linear or branched C.sub.1 -C.sub.10 alkylene group and R.sub.4 represents H or CH.sub.3.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: August 1, 2000
    Assignee: Nidek Co., Ltd.
    Inventors: Haruo Oda, Tsutomu Sunada, Yoshihiro Nakahata