Abstract: An ophthalmic measuring apparatus in one aspect of the invention for examining the crystalline lens of an eye having a measuring unit which projects a measuring light beam on the crystalline lens of the eye and receives the measuring light scattered by the crystalline lens comprises: a reference position setting means for setting a reference position for the eye in a three-dimensional space; a moving means for moving the measuring unit in a three-dimensional space relative to the eye; and a displacement detecting means for detecting the displacement of the measuring unit from the reference position for the eye.

Abstract: A lens meter comprising light sources for project luminous flux for measurement to a lens to be examined and a light receiving element for detecting the measuring luminous flux passed through the lens to be examined, wherein refractive characteristics of the lens is detected on the basis of the examined data by the light receiving element, the lens meter comprises a measurement target having predetermined patterns, device for moving the target to one of a plurality of arrangement positions on the optical path of the measuring luminous flux, device for selecting one position to which the measurement target is to be moved among a plurality of arrangement positions on the optical path on the basis of the examined data by the light receiving element, device for controlling the target moving device in accordance with the selection by the selecting device.

Abstract: An ophthalmic apparatus for analyzing a section of an anterior part of an eye providing an input device for inputting a photographed image data of corneal section which is cut optically by a slit light, an image memory for memorizing the image data of corneal section inputted by the input device, an image analyzing device for analyzing an optical density of the image of corneal section by processing the image data of corneal section memorized by the image memory, and a display device for displaying an analyzed result of the image analyzing device.

Abstract: A irrigation/aspiration apparatus to be used in a cataractal operation comprises an irrigation fluid supply means for supplying an irrigation fluid contained in an irrigation bottle to the patient's eye, and an irrigation fluid aspirating means for aspirating, together with loosened tissues and the like, the irrigation fluid supplied into the patient's eye. The irrigation/aspiration apparatus is characterized by an irrigation flow rate varying means for varying the irrigation rate of the irrigation fluid at which the irrigation fluid supply means supplies the irrigation fluid, and an irrigation flow rate control means for controlling the irrigation flow rate varying means according to the operating condition of the irrigation fluid aspirating means to regulate the irrigation flow rate so that the variation of the pressure in the anterior chamber of the patient's eye is suppressed during the cataractal operation.

Abstract: An ophthalmic apparatus for photographing a section of an anterior part of an eye having slit light projection optical system for projecting a slit light onto an anterior part of an eye to be examined, and section photographing device for photographing a sectional image of the anterior part of the eye where is cut optically by the slit light, including section photographing optical system which is disposed based on the Scheimpflug's principle, the apparatus providing first target projection optical system for projecting a first alignment target onto a cornea of the examined eye, front photographing device for photographing a first alignment target image projected onto the cornea of the examined eye from the front side, first displaying device for displaying an image which is photographed by the front photographing device, second target projection optical system for projecting a second alignment target from a slanting direction corresponding to the examined eye, and second displaying device for displaying a se

Abstract: A fundus camera for photographing fundus of an eye to be examined, comprises observing illumination/target projection optical system provided with a slit-plate having a pin-hole aperture and a ring-slit, for illuminating the eye to be examined with an illumination light bundle for use in observation that is formed by the ring-slit to be ring-shaped by illuminating the slit-plate uniformly, and for projecting an alignment index onto a cornea of the eye to be examined by using a light bundle that has passed through the pin-hole aperture, photographing illumination optical system for illuminating the eye to be examined with a ring-shaped illumination light bundle for use in photography by using a part of optical path of the observing illumination/target projection optical system, observation optical system for observing the focused condition of an image of the alignment index projected onto the cornea of the eye to be examined and the fundus of the eye to be examined by using the observing illumination/target pr

Abstract: A confocal scanning microscope comprises rotational disk having numerous pinholes arranged at positions that are conjugate with respect to an object to be observed, illumination optical system for implementing the pinhole-illumination for the object to be observed through the rotational disk, and observation optical system for conducting a reflected light beam from the illuminated object to be observed through the rotational disk and focuses the light beam to form an image for observation at a position that is conjugate with respect to the rotational disk, wherein the pinholes of the rotational disk are in equiangular arrangement on a parabolic spiral. The number of loops M of the parabolic spiral and the number of equiangular divisions in one round of the parabolic spiral at which the pinholes are located have any of relations: M:N=1:2, 3:2, 5:2, . . . , (2i-1):2, where i is an integer.

Abstract: An ophthalmic apparatus providing a subjective refractive power measuring device for respectively placing optical elements in inspection windows and inspecting refractive powers of eyes to be examined, on a subjective basis, an object indicating device for presenting an object to each eye to be examined, an optometry program designing device for designing an optometry program for activating each of the subjective refractive power measuring device and the object indicating device, and a program executing device for executing the optometry program.

Abstract: An ophthalmic measuring apparatus is provided for automatically detecting blinking and insufficient fixation of an eye under examination, and the light reflected from the cornea, as well as for automatically correcting the variation of sensitivity of the apparatus without using any special calibration devices, in order to obtain highly reliable measurements. The apparatus comprising a laser beam projecting optical system for emitting and converging a laser beam to the crystalline lens of the eye and a scattered light detecting optical system for detecting light scattered by the protein molecules within the crystalline lens through a light-receiving optical system into a photoelectric transducer in order to measure the crystalline lens on the basis of the output signals of the photoelectric transducer.

Abstract: An ophthalmic apparatus for measuring the shape of the cornea of the eye, capable of measuring the pupil in a natural state of vision is provided. An illuminating light source illuminates a cornea shape measuring pattern with red or infrared light to project an image of the cornea shape measuring pattern on the cornea of the eye, and a CCD camera picks up the image of the cornea shape measuring pattern formed on the cornea. A computer analyzes the image of the cornea shape measuring pattern to obtain data of the shape of the cornea and processes the data to calculate the regional curvatures of regions of the cornea. An intraocular illuminating light source illuminates the interior of the eye with red or infrared light, and the CCD camera picks up an image of a pupillary region illuminated by the light emitted by the intraocular illuminating light source and reflected by the interior of the eye.

Abstract: A fundus camera which may maintain sufficient working distance to an eye to be examined, providing a first illumination optical system for illuminating an eye to be examined by using infrared light, a second illumination optical system for illuminating the eye to be examined by using visible light for photo-imaging with part of light path being shared with that of the first illumination optical system an alignment index projection optical system for projecting an alignment index for the adjustment of working distance onto an cornea of the eye to be examined, an observation optical system having photoelectric imaging elements for observing the images of the focusing of the alignment index image and the fundus of the eye to be examined, a first display device for displaying images formed by the photoelectric imaging elements of the observation optical system, a photographing optical system having photoelectric imaging elements for forming images of the fundus of the eye to be examined with part of light path be