Abstract: In a corneal surgery apparatus, a corneal shape measurement unit for measuring a three-dimensional shape of a cornea includes a measurement light projecting optical system for projecting measurement light onto the cornea and its convergent point is shifted by moving a focusing lens along an optical axis, a measurement light receiving optical system including a photo-detector for receiving reflected light from the cornea and its convergent point is shifted by moving a focusing lens along an optical axis, a scanning unit for shifting a projection spot of the measurement light on the cornea in XY directions and an arithmetic unit for performing arithmetic to obtain the three-dimensional shape of the cornea from a position of the projection spot, a result detected by the photo-detector and a position to which the focusing lens is moved.

Abstract: An apparatus for examining an anterior-segment of an eye, capable of grasping each part of the anterior-segment of the eye three-dimensionally and the condition of the center of its pupil accurately.

Abstract: An ophthalmic surgery apparatus comprising a system for observing an anterior portion of an eye, and an optical system for irradiating a laser beam for treatment to the eye, the apparatus is a corneal surgery apparatus irradiating the laser beam to a cornea and ablating a surface thereof, the apparatus comprising a moving device for moving the optical system relatively against the eye, an illuminating device for illuminating a large area of the anterior portion of the eye, a photoelectric transducing device having a two-dimensional light sensing plane, for sensing distribution of light volume of the anterior portion of the eye, a pupil position sensing device for sensing the position of a pupil, a control device for controlling the moving device based on sensed results, a tracking signal generating device for generating a signal to track movement of the eye, whereby the moving device is controlled by the control device so as to track movement of the eye by inputting a signal generated by the tracking signal g

Abstract: An ophthalmic surgery apparatus comprising a system for observing an anterior portion of an eye, and an optical system for irradiating a laser beam for treatment to the eye, the apparatus is a corneal surgery apparatus irradiating the laser beam to a cornea and ablating a surface thereof, the apparatus comprising a moving device for moving the optical system relatively against the eye, an illuminating device for illuminating a large area of the anterior portion of the eye, a photoelectric transducing device having a two-dimensional light sensing plane, for sensing distribution of light volume of the anterior portion of the eye, a pupil position sensing device for sensing the position of a pupil, a control device for controlling the moving device based on sensed results, a tracking signal generating device for generating a signal to track movement of the eye, whereby the moving device is controlled by the control device so as to track movement of the eye by inputting a signal generated by the tracking signal g

Abstract: The present invention intends to provide an ophthalmic apparatus which enables an examiner to diagnose a patient with cataract and the like in the early stage, and which can be used even for a screening examination and the like. The ophthalmic apparatus comprises an illumination optical system for having illumination light enter an inside of an eye to be examined so that the light scattered and reflected on a fundus of the eye illuminates an anterior part of the eye and a photographing optical system having an imaging spectroscope for obtaining an image including spectral information, for photographing a retroillumination image of the illuminated anterior part of the eye with the imaging spectroscope.

Abstract: An ophthalmic apparatus used in refractive surgery for changing a radius of curvature of a cornea, the apparatus comprising a first input device for inputting data about a pre-operative corneal shape of a patient's eye, a second input device for inputting data about an intended post-operative corneal shape of the eye, a third input device for inputting data about a pre-operative MTF of an ocular imaging system of the eye, and an arithmetic device for obtaining an intended post-operative MTF of the ocular imaging system of the eye based on each inputted data.

Abstract: An ophthalmic apparatus used in refractive surgery for changing a radius of curvature of a cornea, the apparatus comprising a first input device for inputting data about a pre-operative corneal shape of a patient's eye, a second input device for inputting data about an intended post-operative corneal shape of the eye, a third input device for inputting data about a pre-operative MTF of an ocular imaging system of the eye, and an arithmetic device for obtaining an intended post-operative MTF of the ocular imaging system of the eye based on each inputted data.

Abstract: A laser treatment apparatus having a guide beam forming mechanism for guiding a treatment laser beam to a diseased part, including a laser beam irradiation optical system which irradiates the diseased part with the treatment laser beam, a target for obtaining a position of the central fovea of a patient's eye which is projected to the fundus, and a fixation mark for fixing the patient's eye so that the central fovea is located at a predetermined position with respect to the target. With the laser treatment apparatus, the central fovea of a patient's eye is easily judged, and, even for a patient's eye having reduced central visual acuity, the fixation is stably conducted.

Abstract: An ophthalmic surgery apparatus comprising a system for observing an anterior portion of an eye, and an optical system for irradiating a laser beam for treatment to the eye, the apparatus is a corneal surgery apparatus irradiating the laser beam to a cornea and ablating a surface thereof, the apparatus comprising a moving device for moving the optical system relatively against the eye, an illuminating device for illuminating a large area of the anterior portion of the eye, a photoelectric transducing device having a two-dimensional light sensing plane, for sensing distribution of light volume of the anterior portion of the eye, a pupil position sensing device for sensing the position of a pupil, a control device for controlling the moving device based on sensed results, a tracking signal generating device for generating a signal to track movement of the eye, whereby the moving device is controlled by the control device so as to track movement of the eye by inputting a signal generated by the tracking signal g

Abstract: An ophthalmic operating apparatus comprising an observation optical system for observing an anterior part of patient's eye, a laser beam irradiating optical system for irradiating a laser beam for treatment on the patient's eye, a moving device for moving the laser beam irradiating optical system relatively with respect to the patient's eye, an illumination optical system for projecting an illumination light from a pupil of the patient's eye so that the anterior part being illuminated by a reflected light at a fundus of the patient's eye from a rear side, and a photographic element for photographing a retro-illumination image of the anterior part illuminated by the illumination optical system.

Abstract: An ablation apparatus for ablating only a convex part on a rough surface efficiently in a short time, providing a light delivering optical system for delivering a laser beam being a slender from a laser beam source rectangular shape to an object to be ablated, a beam moving device for moving the laser beam to an intersecting direction relative to the optical axis of the light delivering optical system, a dividing-and-masking device for dividing selectively a longer-side direction of the laser beam of which a cross section is a rectangular shape and masking the same selectively, a data input device for inputting data relating to an ablation area of the object, and a control device for controlling the condition masked by the dividing-and-masking device at respective positions of the laser beam moved by the beam moving device based on the data inputted by using the data input device, wherein convex parts of the object of which a surface being roughness is ablated by the laser beam through the dividing-and-maskin

Abstract: An apparatus for use in operating upon a cornea of an eye comprises a light delivery optical system for delivering an ultraviolet laser beam emitted from a laser source onto the cornea, a diaphragm with an aperture, disposed in the light delivery optical system, for restricting an irradiation area of the laser beam, a device for shifting the laser beam with respect to an optical axis of the light delivery optical system, a device for rotating the laser beam about the optical axis of the light delivery optical system at each shifting position to ablate the cornea circularly, a device for inputting information necessary for determining the shape of the postoperation cornea, a device for determining ablation amount at each shifting position of the laser beam by the beam shifting device, based on the information input through the input device, and a device for controlling the laser source and action of the beam rotating device based on the ablation amount determined by the ablation amount determining device at ea

Abstract: An apparatus for ablating the surface of the cornea using a laser beam to correct the refractive of an eye to be operated having a laser source for emitting a laser beam having a non-uniform intensity distribution of Gaussian distribution and the like to one direction and a uniform beam intensity in another direction, an ablation optical system for ablating the surface of the cornea by the laser beam emitted from the laser source, translational scanning device for scanning the laser beam in the direction of non-uniform intensity distribution, beam rotating device for rotating the laser beam emitted from the laser source round the optical axis in the ablation optical system, control device which controls the beam rotation by the beam rotating device whenever the laser beam is scanned in parallel by the scanning device.

Abstract: An operation apparatus for ablating the cornea by laser beam and correcting ametropia of the eye comprising a diaphragm with variable aperture, which is disposed on the optical path along which the laser beam is irradiated on the cornea, a shading member for shading the aperture of the diaphragm in the meridian diameter direction of the aperture, which is capable of varying the shading area to the aperture of the diaphragm by changing the turning angle to the optical path, in which aperture diameter of the diaphragm and variation in scope of the shading area by the shading member being controlled, and a beam rotator disposed in the eye side to the diaphragm rotates the laser beam passed through the aperture of the diaphragm about the optical path, whereby the cornea is ablated thicker at the periphery than at the center so as to correct hypermetropia.

Abstract: An ophthalmic apparatus for measuring and operating a subject's eye, which includes an ophthalmic operation apparatus, provides an alignment mechanism including a slit image projecting system for projecting an alignment slit image on the subject's eye, a slit image observing system for observing the slit image projected on the subject's eye, wherein a plurality of the slit image projecting system are arranged so as to project the slit image from at least two directions on the subject's eye, the directions putting the optical axis of the slit image observing system therebetween, and an alignment moving device by which an apparatus body including the slit image observing system is moved relatively to the subject's eye in three-dimensional direction.

Abstract: An apparatus for laser surgery on a cornea for correcting the refractive error of a patient's eye by removing away a part of the cornea by a laser beam.

Abstract: An ablation apparatus for ablating an object to a uniform depth by a laser beam. The laser may be an excimer laser, having non-uniform beam intensity of Gaussian distribution and like. Therefore the laser beam is scanned to the non-uniform intensity distribution and irradiated on the surface of the objection, whereby uniform depth of ablation is achieved. The apparatus is preferably applied to the operation of the cornea.

Abstract: An operation apparatus for ablating the cornea by laser beam and correcting ametropia of the eye comprising a diaphragm with variable aperture, which is disposed on the optical path along which the laser beam is irradiated on the cornea, a shading member for shading the aperture of the diaphragm in the meridian diameter direction of the aperture, which is capable of varying the shading area to the aperture of the diaphragm by changing the turning angle to the optical path, in which aperture diameter of the diaphragm and variation in scope of the shading area by the shading member being controlled, and a beam rotator disposed in the eye side to the diaphragm rotates the laser beam passed through the aperture of the diaphragm about the optical path, whereby the cornea is ablated thicker at the periphery than at the center so as to correct hypermetropia.

Abstract: An ablation apparatus for ablating the surface of a cornea by laser beam having a laser source for emitting a laser beam, an ablation optical system for ablating the surface of a cornea by the laser beam emitted from the laser source, an diaphragm with a variable diameter for changing an ablation area on the cornea, a cornea shape forming device for forming a desired shape of cornea's optical zone by superposing the irradiation through the ablation optical system, an input device for inputting a data to determine a transition zone as to be connected the optical zone with a non-ablation area smoothly, and a control device for controlling the diameter of the diaphragm by determining the shape of the transition zone based on the data inputted through the input device.