Nidek Co., Ltd.

Other

Yutaka Fukuda

Yasuo Tano

Takashi Fujikado

Takeshi Morimoto

Tomomitsu Miyoshi

Yoshikatsu Asano

Koichiro Muneki

Yutaka Ishizaka

Kazuo Aoki

Hiroichi Nabeshima

Tetsuya Yagi

Koji Minagawa

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

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

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).

Visual restoration aiding device

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

A method and apparatus for determining or adjusting a projecting direction of a light beam emitted from an automobile headlight is provided. In a first aspect of the present invention, the peripheral region of a light beam is used in determining its projecting direction. In particular, a region definable in a light pattern of the projected beam having a proportionality relation between log S and I, where S indicates the value of an area having light intensity I or above, is determined and its outer contour or any predetermined point in the contour is used in determining the projecting direction. In a second aspect, apparatus for determining a projecting direction of a light beam emitted from an automobile headlight includes an indicator which automatically indicates a predetermined position of a light pattern of the light beam projected. In a third aspect, there is provided a system for automatically adjusting a projecting direction of a light beam if it deviates from a predetermined direction using a motor engageable with a mounting structure of the headlight.

Growing community of inventors

Toyonaka, Japan

Yutaka Fukuda