Nidek Co., Ltd.

Other

Hoya Healthcare Corporation

Inami & Co., Ltd.

Yasuo Tano

Takashi Fujikado

Yutaka Fukuda

Yasuo Ota

Eiji Yonezawa

Takeshi Morimoto

Tomomitsu Miyoshi

Hirokazu Sakaguchi

Hitoshi Abe

Kiyoshi Makihara

Masanori Enomoto

Hiroyuki Kanda

Sayaka Nakajima, Legal Representative

Kojiro Tano, Legal Representative

Ryotaro Tano, Legal Representative

Ryoko Tano, Legal Representative

Tetsuya Yagi

Park In Won

Yoshihiro Saitou

Masato Ooji

Motohiro Kamei

John M Lewis

An object is to provide an artificial vision system ensuring a wide field of view without damaging a retina. In the artificial vision system, a plurality of electrodes () are to be implanted so as to stick in an optic papilla of an eye of a patient. A signal for stimulation pulse is generated based on an image captured by an image pick up device () to be disposed outside a body of the patient. The electrical stimulation signals outputted from the electrodes () based on the signals for stimulation pulse stimulate an optic nerve of the eye, thereby enabling the patient to visually recognize the image from the image pickup device ().

Artificial vision system

A sight regeneration assisting device for regenerating the sight of a patient comprises a plurality of needlelike electrodes each having a pointed distal end and being to be inserted in an optic papilla of a patient's eye in use; and a signal generator connected with the electrodes through a conductive wire to generate an electric stimulus pulse signal to be outputted from the electrodes, each of the electrodes, excepting a predetermined portion including the distal end, being coated with a coating layer made of resin exhibiting good biocompatibility and insulation, and the coating layer being formed with a turn-back retaining portion for retaining the electrode.

Sight regeneration assisting device

A visual restoration aiding device for restoring vision of a patient, comprises: a signal generation unit including a substrate to be placed on an outer side of a choroid of a patient's eye and a plurality of electrodes arranged on the substrate for applying electrical stimulation pulse signals to cells constituting a retina; a photographing unit which photographs an object to be recognized by the patient; and a processing unit which converts image data obtained by the photographing unit to data for electrical stimulation pulse signal and transmits the converted data to the signal generation unit: wherein, based on the data for electrical stimulation pulse signal transmitted from the processing unit, the signal generation unit forms a waveform of an electrical stimulation pulse signal to be outputted from each electrode into a biphasic rectangular wave including rectangular waves of opposite polarities, and sets a pulse width of the electrical stimulation pulse signal to 0.2 msec. or more and 2 msec. or less.

Visual restoration aiding device

A vision regeneration assisting device for regenerating vision of a patient, comprising: a plurality of electrodes which are stuck and placed into an optic disc of the patient; a storage unit which stores a generation position of a phosphene specific to the patient in association with the first output conditions for the stimulation signal that has caused to generate the phosphene, the storage unit storing various first output conditions for the stimulation signals and the generation positions of the phosphenes caused by the stimulation signals based on the various first output conditions in association with each other; a processor which sets second output conditions for the stimulation signal based on image data obtained by an external photography unit and the generation positions of the phosphenes stored in the storage unit, and converts the obtained image data into data for the stimulation signal based on the set second output conditions.

Vision regeneration assisting device

An ophthalmic treatment method for inhibiting death of retinal constitutive cells of an eye by stimulating the cells includes a first step of placing a positive electrode and a negative electrode in such positions outside the eye that the electrodes provide electrical stimulation to the cells, at least one of the electrodes being placed on one of a cornea and sclera of the eye; and a second step of generating an electrical stimulation pulse having an electric current set at 20 &#x3bc;A or more but not exceeding 300 &#x3bc;A from each placed electrode.

Ophthalmic treatment stimulation method for inhibiting death of retinal cells

In surgery of the vitreous body in an eyeball of a human body, a burden on and time of a surgeon is suppressed from being spent, a burden on the eyeball of a patient is greatly reduced, and further, the possibility of a complication after the surgery is also lessened. A holding apparatus, which has eyelid opener portions for pulling and opening upper and lower eyelids, a lens ring for holding a surgical contact lens on the eyeball, and connecting portions for connecting the eyelid opener portions with the lens ring of the surgical contact lens so that the surgical contact lens is held on the eyeball, is set on the eyeball of the patient, which makes it unnecessary to stitch of the lens ring on the eyeball.

Holder of contact lens for vitreous body operation, and holding part and connection part of contact lens for vitreous body operation

A visual restoration aiding device for restoring vision of a patient, comprises: a substrate which will be placed on or under a retina, a choroid or a sclera of a patient's eye; a plurality of electrodes arranged on the substrate for applying electrical stimulation pulse signals to cells constituting the retina; a photographing unit which photographs an object to be recognized by the patient; and a control unit which controls output of the electrical stimulation pulse signals from each electrode based image data captured by the photographing unit. The number of the electrodes placed on the substrate is less than the number of electrodes that can simultaneously output the electrical stimulation pulse signals based on the image data corresponding to one frame. The control unit is configured to sequentially output the electrical stimulation pulse signals at predetermined time interval based on the divided image data corresponding to one frame so as to allow the patient to recognize the image corresponding to one frame by joining two or more divided sections of the image corresponding to one frame.

A visual restoration aiding device includes an electrode array () having a plurality of electrodes () placed on an outside of a choroid (E) of a patient's eye (E) to electrically stimulate cells constituting a retina (E).

An ophthalmic treatment apparatus includes an electrode which is set on a place to apply electrical stimulation to cells constituting a retina; and an electrical stimulation pulse generator which is connected to the electrode, for generating, from the electrode, a predetermined electrical stimulation pulse whose electric current is set at 20 &#x3bc;A or more but not exceeding 300 &#x3bc;A.

Ophthalmic treatment apparatus

In a treatment laser apparatus, when the data on a laser spot magnification of a contact lens CL to be used for treatment of a patient's eye E is input by means of a controller and the data on a spot size of treatment laser beams in air is input by means of a change knob a real spot size of the laser beams which is irradiated to an affected part of the patient's eye E is calculated in a control section based on the both inputted data, and the calculated result is displayed on a display section

Laser treatment apparatus and laser treatment information display device

An instrument for removing proliferative membranes in a treatment for proliferative vitreoretinal disorders includes an ophthalmic treatment tool for using in an ophthalmic surgery, the tool including: a grip portion; a rod-shaped body attached to one end of the grip portion; an elastic body fitted along a direction toward a front end of the rod-shaped body to the front end side of the rod-shaped body; and hard inorganic fine-grains or particles fixed on a tapered tip of the elastic body.

Membrane eraser

An ophthalmic surgical apparatus for vitreous surgery in the eyeball comprises a probe provided with a guide knife, having an end portion formed in a predetermined curve, and a dissecting knife movable along the curve of the guide knife to dissect proliferated membrane, moving device that moves the dissecting knife so as to reciprocate between an initial position and the end portion of the guide knife.

Ophthalmic surgical apparatus

An ophthalmic laser apparatus has a proper exit angle from a probe to prevent a sclera from being damaged when the probe is used to treat an eye of a patient. A laser beam emitted from a laser oscillator is directed to a light cable receptacle connector by an optical system. The laser beam is directed to a delivery optical system or a probe by a light cable having a connecting part at one end thereof to be connected to the light cable receptacle connector. The probe is bent near an end thereof and the end of the probe is generally spherically shaped.

Growing community of inventors

Kobe, Japan

Yasuo Tano