Abstract: A fundus imaging apparatus comprises: a beam emitter which simultaneously emits a first laser beam and a second laser beam having a different wavelength from the first beam; an irradiation optical system having a beam scanner which scans the emitted first and second beams in two dimensions on a fundus, the irradiation optical system being adapted to irradiate the emitted first and second beams onto the fundus; a first filter which intercepts the first and second beams reflected by the fundus and second fluorescence from the fundus by irradiation of the second beam and transmits first fluorescence from the fundus by irradiation of the first beam; a second filter which intercepts the first and second beams reflected by the fundus and the first fluorescence from the fundus and transmits the second fluorescence from the fundus; an imaging optical system having a photo-receiving element which receives the first fluorescence having passed through the first filter and the second fluorescence having passed through th

Abstract: A device for examining for the eyeground of a patient's eye (1) has a head holder (3) for fixing the patient's head and a slit lamp unit (19 or 22). Provided on the head holder is a laterally movable lens carriage (9), in the shaft guide (10) of which a lens holder (11) can be introduced with its shaft (27) from above. For positioning the lens (12) in front of the eye (1), the lens holder is coupled in terms of movement to the microscope by means of an adapter (25) and a guide plate (24). The lens carriage, the lens holder and the adapter or the guide plate are in this case formed in such a way that the lens holder can be spatially fixed and uncoupled from the microscope with few manipulations, which makes it possible for an image of the eyeground to be formed the microscope in an optimum way.

Abstract: A method of diagnosing, prognosing, staging, and/or monitoring a mammalian amyloidogenic disorder or a predisposition thereto by detecting a protein or polypeptide aggregate in the cortical and/or supranuclear regions of an ocular lens of the mammal.

Abstract: A portable slit-lamp apparatus, including a body (11) able to be held in the hand of an operator and a solid state lamp means (55) and associated optics (52) carried by the body for generating a narrow beam of light and projecting the beam onto the cornea of a patient s eye for reflection by structures of the eye, when the body is held at a suitable position in front of the eye. Means (22) is mounted in cooperation with the body and the solid state lamp means to detect a reflection of the narrow beam of light by structures of the eye and to make an image thereof, which image is, or is processable to provide, a digital record of the reflection.

Abstract: A device for projecting a light beam on an object includes a light source for generating the light beam and projection optics for transmitting the light beam from the light source to the object. At least one prism with at least two essentially plane-parallel surfaces is arranged in the beam path of the light beam between the light source and the object as part of the projection optics. The prism is movably supported and can be driven by a drive unit in such a way that the light beam is shifted in a parallel fashion by an amount (X) that depends on the position of the prism when the light beam passes through the plane-parallel surfaces of the prism.

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 eye's optical characteristic measuring system comprises an aperture diaphragm 14 arranged at a position approximately conjugate to a pupil of an eye 1 under testing and for determining regions to pass a light beam on the pupil 18, a projection optical system 2 for projecting a primary index image on a fundus of the eye under testing via the aperture diaphragm, a photodetection optical system 3 for forming a secondary index image on a photoelectric detector 21 via the aperture diaphragm by a reflected light beam from the fundus of the eye under testing, and detecting units 26, 27 and 28 for detecting a light amount intensity distribution of the secondary index image based on a signal from the photoelectric detector.

Abstract: There is provided an ophthalmologic apparatus that prevents ghost light from generating. In the ophthalmologic apparatus, on an optical path commonly used for an eye fundus illumination optical system and an image taking optical system including an image taking diaphragm, an objective lens for forming an image of the image taking diaphragm onto an anterior ocular segment of an eye to be examined is provided. The objective lens is formed such that the entire light beam from the center of the image taking ,diaphragm is substantially perpendicularly incident thereon. The objective lens is a refractive index distributed lens in which a refractive index is high in a vicinity of an optical axis and reduces as a distance from the optical axis increases.

Abstract: An ophthalmic apparatus has an illumination optical system for illuminating a preselected point of a patient's eye with slit-light. Objective lenses are each disposed in an observation optical path for forming an image of the preselected point of the patient's eye. Eyepiece systems are disposed in respective ones of the observation optical paths for observing the image of the preselected point of the patient's eye. An imaging device captures the image of the preselected point of the patient's eye. An optical element guides the image of the preselected point of the patient's eye to the imaging device. The optical element is disposed between the objective lenses at a position that does not lie in any of the observation optical paths.

Abstract: The present invention intends to provide an apparatus for analyzing a sectional image of an anterior eye segment and a program for the same which reduce a burden on an examiner, and to provide a more reliable, reproducible result. The apparatus for analyzing a sectional image of an anterior eye segment which is light-sectioned by slit light and photographed comprises a defining device for defining a target opacity part in the sectional image based on a density distribution being between a cornea and a fundus and being in a first direction perpendicular to an optical axis of an eye to be examined, a determining device for determining an area to be analyzed based on the defined opacity part, and an analyzing device for analyzing an opacity condition base on the density distribution in the determined area.

Abstract: The invention relates to an ophthalmoscope for examining the fundus of an eye of a patient, which comprises at least one illuminating device producing at least one illuminating beam, in addition to an imaging lens system which can be associated with the illuminating device and which images the illuminating beam onto the fundus of the eye of a patient; also comprising an observation device, wherein the imaging lens system images an observation beam onto the fundus of the eye, said observation beam being produced by reflecting the illuminating beam; also comprising a diaphragm arrangement introduced into the illuminating beam and the observation beam, whereby the gap of said diaphragm can be variably modified and synchronised.

Abstract: An ophthalmic apparatus includes an illumination optical system for illuminating a specified point of a subject eye with slit-light and an observation optical system having left and right eyepiece systems to enable an examiner to use both eyes to observe an image of the specified point formed by objective lenses. An optical element is located between the objective lenses and the specified point and between the effective diametric centers of the left and right eyepiece systems to guide the image of the specified point of the eye to an imaging means. Such an arrangement enables differences between the observed and captured images to be substantially eliminated and the images to be observed with no degradation.

Abstract: An ophthalmic photographing apparatus capable of photographing a fundus and a slit-sectioned anterior segment of an eye in non-mydriatic conditions. The apparatus is provided with a light source unit including an infrared light source optical system for observation and a visible light source optical system for photographing, a hand-held photographing unit including a first illumination optical system with an illumination lens, and an observation/photographing optical system with an objective lens, and being separated from the light source unit, a slit light illumination unit including a second illumination optical system with a slit plate and an illumination lens, and being removably attached to the photographing unit, and a photoconductive tube connecting the light source unit to the photographing or illumination unit and transmitting infrared light for observation and visible light for photographing from the light source unit to the first or second illumination optical system.

Abstract: An ophthalmic measuring device for obtaining three-dimensional information of an eye to be examined without time lag by projecting pulsed light chirped in such a manner that color is continuously changed from the leading end through the tail end of a pulsed light with time on the eye to be examined, cutting out the pulsed light reflected from the eye to be examined at a predetermined timing by a shutter, and obtaining spectroscopic distribution characteristic of the cut-out image by a spectroscopic unit.

Abstract: One or more embodiments of the present invention provide a method and apparatus to determine a corneal thickness profile of an eye. In particular, one embodiment of the present invention is a corneal diagnostic instrument including: (a) a Placido ring illuminator disposed to project a Placido ring image onto a cornea to generate a reflected Placido ring image; (b) multiple slit lamp projectors disposed to project slit light beams onto the cornea to generate slit light beam images; (c) a camera system optically disposed to detect the reflected Placido ring image and the slit light beam images; and (d) a controller, coupled to the slit lamp projectors, the Placido ring illuminator, and the camera system, to cause the slit light beam images and the reflected Placido ring image to be generated and detected in a predetermined sequence, wherein the controller is responsive to the detected reflected Placido ring image and the detected slit light beam images to determine a corneal thickness profile.

Abstract: A visual acuity examination apparatus is provided with a mark display face which has an outer face on which at least one mark is displayed so as to be viewed and which is formed such that the at least one mark and the periphery thereof are illuminated with a predetermined brightness, and a light shielding face which is disposed in front of the display face to be subjected to high speed movement, which is formed with a slit having a proper width and whose front face is formed so as to be illuminated with the same brightness as that of the mark display face. Accordingly, an accurate display contrast of the mark can be realized with a simple structure and without deterioration with age.

Abstract: A measurement system is provided for measuring distances in the anterior chamber of an eye in conjunction with a slit lamp ophthalmologic microscope table. The measurement system includes a linearly movable interface assembly operative to pick up motions of the microscope assembly in a direction along an optical axis of the eye. A linear measurement assembly is coupled to the interface assembly and operative to determine a distance traveled by the interface. The measurement system may further be provided with a three-axis motion assembly and an optical microscope assembly mounted on the motion assembly. An image recording device is optically aligned with the optical microscope assembly to record images from the optical microscope assembly.

Abstract: There is provided a slit lamp microscope in which a dedicated image pickup device is installed to an observation system to enhance the image pickup function for an eye to be examined, operability of the observation system by an examiner is excellent, and moreover the cables are not exposed, thereby achieving a superior outward appearance. The slit lamp microscope includes an illumination system for illuminating an eye to be examined, an observation system for observing the eye to be examined, a support arm for supporting the observation system on the upper end side thereof, a base for rotatably on a protruding shaft barrel portion thereof the illumination system and the lower end side of the support arm supporting the observation system, a pedestal for supporting the base, a chin rest stand for securing the eye to be examined with a state in which the eye is opposed to the observation system, and a table on which the pedestal is installed and to which the chin rest stand is attached.

Abstract: A portable slit-lamp apparatus, including body (11) able to be held in the hand of an operator and a solid state lamp means (55) and associated optics (52) carried by the body for generating a narrow beam of light and projecting the beam onto the cornea of a patients eye for reflection by structures of the eye, when the body is held at a suitable position in front of the eye. Means (22) is mounted in cooperation with the body and the solid state lamp means to detect a reflection of the narrow beam of light by structures of the eye and to make an image thereof, which image is, or is processable to provide, a digital record of the reflection.

Abstract: A system and method for objectively testing for ocular changes including age-related macular degeneration through reliance on involuntary physical reactions such as the fixation reflex and optokinetic nystagmus. A narrow band of visible blue light is beamed at the patient's eye through alternate apertures in a mask which are separated by a relatively small angle of subtendance at the entrance pupil. In the presence of a healthy macula, the blue light is filtered out and the fixation reflex is absent. Conversely, if the macula is in the process of degenerating by the progressive loss of protective pigments, then the impinging of the narrow band of visible blue light upon the macula, via the alternate apertures, will evoke the fixation reflex.

Abstract: Embodiments of the present invention provide a method and apparatus for measurement of a corneal profile of an eye. In particular, one embodiment of the present invention is a corneal diagnostic instrument including: (a) a Placido ring illuminator disposed to project radiation onto a cornea to generate a Placido ring image; (b) multiple slit lamp projectors disposed to project slit light beam images onto the cornea to generate slit light beam images; (c) a camera system optically disposed to detect the Placido ring image and the slit light beam images; and (d) a controller, coupled to the slit lamp projectors, the Placido ring illuminator, and the camera system, to cause the slit light beam images and the Placido ring image to be generated and detected in a predetermined sequence, wherein the controller is responsive to the detected Placido ring image and the detected slit light beam images to determine a corneal thickness profile.

Abstract: An ocular optical characteristic measuring apparatus measures light intensity distribution in a target image projected on the fundus of an eye and determines the ocular optical characteristic of the eye on the basis of the light intensity distribution. A light-projecting optical system projects light emitted by a light source on the eye to form a target image on the fundus of the eye, a light-receiving optical system focuses reflected light reflected by the fundus to form a target image on a photoelectric device. An arithmetic unit determines a light intensity distribution in the target image formed on the photoelectric device on the basis of an image signal provided by the photoelectric device and estimates the optical characteristic of the eye from the light intensity distribution in the target image.

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: The invention is a low cost, low input power eye viewing device well suited for viewing wide field retinal images through an undilated pupil. Included in the device are a converging light illumination system and an aperture stop. The converging light illumination system provides ease of entry of light rays into an eye, wide field retinal illumination, reduced glare and reduced power consumption. The aperture stop blocks unwanted received glare light not forming part of the retinal image. The device is made especially well suited for retinal viewing through an undilated pupil if the aperture is sized in accordance with the diameter of an undilated pupil.

Abstract: The present invention relates to a system for the stereoscopic examination of a patient's eye using a slit-lamp microscope (3), wherein the patient's eye (1) is illuminated by a light strip of a predetermined cross section which is emitted by a light source (5). The light source (5) is arranged on the vertical arm (20) of a support (7) and the eye (1) to be examined is placed in an essentially horizontal plane on one side of said support. The stereo-microscope (3) is essentially placed on a plane which is located on the side opposite to the first side of the support (7). The vertical arm (20) of the support (7) is made in the shape of a column having a narrow cross section so as to minimize the optical obstruction between the stereo-microscope (3) and the patient's eye. Using at least one beam (30b) from the stereo-microscope (3), a partial ray is stopped down and the image information of said ray is directed to a reception unit (44) located in said stereo-microscope (3).

Abstract: The invention relates to a slit projector comprising a light source, a slit diaphragm arranged in front of the light source, and a lens system arranged in front of the slit diaphragm. Such a slit projector is used in particular in slit lamps. The front chamber of the eye can be illuminated with such slit projectors in order to be able, for example, to take pictures of the slit image of the front chamber of the eye. High performance light sources are needed for this. These are presently not available at acceptable prices. Therefore, the purpose exists to improve a slit projector in such a manner that same presents a slit of the needed brightness for viewing the eye and in particular for slit image photography. This is attained in such a manner that the light source consists of several light diodes 1 arranged essentially in a longitudinal direction of the slit, namely in the plane of the projected slit.

Abstract: An eye's optical characteristic measuring system comprises an aperture diaphragm 14 arranged at a position approximately conjugate to a pupil of an eye 1 under testing and for determining regions to pass a light beam on the pupil 18, a projection optical system 2 for projecting a primary index image on a fundus of the eye under testing via the aperture diaphragm, a photodetection optical system 3 for forming a secondary index image on a photoelectric detector 21 via the aperture diaphragm by a reflected light beam from the fundus of the eye under testing, and detecting units 26, 27 and 28 for detecting a light amount intensity distribution of the secondary index image based on a signal from the photoelectric detector.

Abstract: An anterior segment photographing apparatus comprises a slit light beam projecting system for projecting a slit light beam on an eye to be examined, an image forming optical system disposed right in front of the eye to be examined and capable of forming an image of a section of the anterior segment of the eye represented by the slit light beam reflected from the eye on a light receiving, a concave mirror having a concave reflecting surface in a shape of rotational symmetry with respect to the optical axis of the image forming optical system and capable of collecting and reflecting the reflected slit light beam reflected from the eye, and a reflecting mirror for reflecting the reflected light reflected from the concave mirror toward the image forming optical system.

Abstract: In order to observe a front eye portion of an eye (E) to be examined, when a frame is moved to within a first region to approach the eye E to be examined, a stereo angle converting portion as means for shifting an optical path and a color temperature converting element (61) as optical converting means are removed from right and left optical axes (L1 and L2). On the other hand, in order to observe an eye fundus portion of the eye (E) to be examined, when the frame is moved to within a second region to leave the eye (E) to be examined, the stereo angle converting portion and the color temperature converting element (61) are disposed on the right and left optical axes (L1 and L2).

Abstract: The invention is characterised by the provision that in a slit lamp or a slit lamp projector an oblique thin glass flat with a partial reflection of the light is disposed at a defined angle relative to the optical path above the filter assembly between the latter and the “slit projector” lens (4), and in the configuration with an achromatic doublet lens between the lens assemblies in the parallel optical path, in such a way that as a result one part of the incident rays is incident as deflected light cone on a detector assembly which is arranged laterally in the housing at an angle dependent on the angle of the thin glass flat in the housing, which detector assembly measures the respectively existing luminous intensity, transmits the detected values to an evaluation and control means which compares the values so received against a predetermined maximum value, calculates the irradiation dose for the phakic or aphakic eye and, when the value is exceeded, signals this situation on an indicating alarm

Abstract: The invention relates to a device for the examination of an eye using a Scheimpflug camera and a slit light projector for slit images of an eye. The Scheimpflug camera and the slit light projector are carried by a stand, whereby the slit light projector and the scheimpflug camera are arranged rotatably about a common axis coinciding essentially with the optic axis of the eye. Such a device is improved so that without interruptions and returns of the Scheimpflug camera to an initial position, the eye can be scanned multiply by means of the device. This is achieved by the slit light projector and the Scheimpflug camera being freely rotatable about the axis through more than 360°, and by a voltage supply to both the Scheimpflug camera and the slit light projector occurring through a transmitter.

Abstract: A slit-lamp biomicroscope which illuminates an eye to be examined with slit illumination light, the biomicroscope comprises an illumination optical system provided with an illumination light source and a slit plate of which slit width is adjustable, a plurality of types of filters each having a different optical characteristic which are inserted into, and removed from an optical path of the illumination optical system, a filter detection device for detecting a type of the filter being inserted in the optical path of the illumination optical system, a light amount change device for changing an amount of illumination light on a side of the illumination light source with respect to the slit plate and a control device for controlling the light amount change device such that the amount of illumination light is adjusted to an amount corresponding to the detected filter based on a detection result obtained by the filter detection device.

Abstract: The present invention consists of obtaining from a series of measurements or original images of varying precision of a mobile object, such as a beating heart, a sequence of restored images minimizing an error function comprising an adequation term between the restored images and the measurements, a space moving term of images to be restored and a time smoothing term of restored images, taking account of an evaluation of the movement of the object between the original image during the considered phase of the movement and the image of the object in a neighboring phase.

Abstract: Systems, methods, and apparatus are provided for deriving the relative position of an eye by tracking a boundary of the eye such as the limbus (i.e., the interface between the white sclera and the colored iris). A technique for tracking the position of the eye of patient comprises directing light to an annular region of the eye between the sclera and the iris and receiving reflected light from that region. The intensity of the reflected light is then measured to determine a relative position of the eye. In some embodiments, the measured region is scanned around the boundary. In other embodiments, a light spot is scanned around a substantially annular trajectory radially outward from the pupil. The signals corresponding to the intensity of the reflected light are then processed and measured to determine the eye's position. A flap of tissue covering the boundary may be automatically detected so as to selectively measure the boundary away from the flap.

Abstract: An auxiliary lamp for a slit lamp device used in eye examination, to improve digital photography of the eye being examined, includes a casing and a fiber optic bundle terminating in a glued and polished end face, which end face forms a light emitting line. A cylindrical lens is positioned in front of the end face and is adjusted by a finger-operated screw device to be moved toward, and away from, the end face to focus the line of light.

Abstract: The instrument is to be adapted to an ophthalmic slit-lamp (2,6) and includes holders for fluorescence excitation and barrier filters (3,5) to the light path and a detector system made of a linear array of photodiodes (8) with respective circuitry for reading and control. The light is focused in a chosen zone of the eye (13) inducing fluorescence by using specific wavelength. The fluorescence is measured by the detector (8) coupled to one of the eyepieces (12) of the slit-lamp (26) or to a beam-splitter (7) placed before the eyepieces (12). There is a system for digitalization of the signal from the detector (8) which is connected to an IBM compatible computer (11) where the data is stored and analyzed.

Abstract: An imaging optical instrument with an optical system establishing an observation beam, and illuminating device generating a lighting beam, a slot-like observation diaphragm moving in an intermediate image plane of the observation beam and a slot-like lighting diaphragm moving synchronously in an intermediate image plane of the lighting beam, in which the observation beam and the lighting beam meet obliquely on the object plane and the slot images of the observation diaphragm and the lighting diaphragm substantially coincide in the object plane.

Abstract: A surface treatment laser beam delivery and tracking system is provided. The laser generates laser light along a original beam path at an energy level suitable for treating (e.g., eroding) a surface. An optical translator shifts the original beam path onto a resulting beam path. An optical angle adjuster changes the angle of the resulting beam path relative to the original beam path such that the laser light is incident on, and spatially distributed, the surface to be treated. A motion sensor transmits light energy to the surface and receives reflected light energy from the surface via the optical angle adjuster. The light energy transmitted by the motion sensor travels on a path that is parallel to the shifted beam as they travel through the optical angle adjuster. The reflected light energy is used by the motion sensor to detect movement of the surface relative to the original beam path and generate error control signals indicative of the movement.

Abstract: An optical diagnostic apparatus for measuring toric contact lens rotation comprising a slit lamp optical instrument including a light source, a slit light projector for projecting a beam of light, and a slit light rotator for rotating the beam of light, a patient head retainer in alignment with the projector to project a slit light beam from the projector onto the eye of a patient and a contact lens on the eye, a slit light rotator actuator for the slit light rotator, for rotating the projected slit light over a range of angles onto the patient's eye and the contact lens thereon, a gravity responsive angle indicator and/or electronic indicator at the slit light rotator, and an arcuate angle scale rotatable with the slit light rotator and cooperable with the indicator to indicate angle of rotation of the angle scale and rotator, whereby the contact lens toric angle can be observed for determining the toric contact lens prescription.

Abstract: A scan imaging device capable of generating a stereoscopic image of an object to be examined projects two light beams and scans the object with the light beams, and the reflected light beams are obtained through the same light path and are respectively received by two light detectors for generating a set of images with a parallax. The images are displayed alternately on a television monitor and are viewed through spectacles with polarizing screens, whereby the examiner can obtain a stereoscopic view of the object.

Abstract: This invention provides a microscope for operation which can form a black point for protecting a patient's retina even when the retina part is not at the center of the field of view of the microscope. The microscope for operation has an X-Y stage for moving the microscope body, a CCD camera for obtaining an image in the field of view of the microscope, a liquid crystal device provided with a light transmitting surface transmitting illuminating light therethrough and comprised of display dots disposed in the form of a matrix, and a control device for controlling and driving the liquid crystal device.

Abstract: In an ophthalmic measurement apparatus providing optical systems for focusing-and-projecting a laser beam for use in measuring onto an anterior portion of an eye to be examined, and for receiving a scattered light by the internal tissues of the anterior portion of the eye by a scattered laser beam by guiding the scattered light to a photoelectric transducing element, and for measuring tissues and components in the internal parts of the anterior portion of the eye based on an output signal transmitted from the photoelectric transducing element, alignment is performed by advancing a cylindrical shaped lens for forming a laser beam to be a slit-shaped light bundle in a light path in laser beam projecting optical system with observing an image of a section of the anterior portion of the eye which is light-sectioned by a slit-shaped laser beam, or by scanning a laser beam by laser beam scanning device with observing an image of a section of the anterior portion of the eye which is light-sectioned by the scanned la

Abstract: An eye examining apparatus has a light source generating a beam of light to be applied to an eye to be examined, and a photoelectric sensor for receiving the light from the eye to be examined. The examination of the eye to be examined is executed by the light reception of the photoelectric sensor. The apparatus further includes a scanning optical system for deflecting the beam of light to be applied from the light source to the eye to be examined and executing the scanning of the eye to be examined by the beam of light to be applied. The scanning optical system directs the light from the scanned position of the eye to be examined to the photoelectric sensor. The apparatus also includes an observation system for the eye to be examined for displaying an area wider than the scanned region of the eye to be examined by the use of the light passed through a portion of a member the scanning optical system.

Abstract: An apparatus for measuring the refractive power of an optical system has a scan optical system for scanning a fundus with slit light beams, a measuring optical system for taking the slit light beams reflected from the fundus of the examined eye, a plurality of light receivers for detecting the slit light beams taken in by the measuring optical system, and a calculator for obtaining Fourier spectrums by Fourier-transforming detection signals of the plurality of light receivers and thus calculating the eye refractive power of the examined eye on the basis of predetermined frequency components of Fourier spectrums of the detection signals.

Abstract: A slit lamp microscope, which includes an illumination optical system for slit illumination onto an eye to be examined and an observing optical system containing an objective lens for observation of the eye exposed to the slit illumination, comprises a confocal scanning microscope unit containing an illumination optical system for illuminating a rotating circular disc provided with a plurality of pinholes and illuminating an observation plane of the eye to be examined by illumination light transmitted through the pinholes of the rotating circular disc, and a light delivery optical system for focusing the luminous flux reflected from the observation plane of the eye on the rotating circular disc and delivering it to the objective lens, and a setting device to set the confocal scanning microscope unit in the front of the objective lens.

Abstract: A glare tester suitable for use with conventional subjective refractors for testing visual acuity is disclosed. The tester may be fitted to new refractors or retrofitted to existing refractors. The preferred tester is a plastic annular ring with a plurality of LEDs mounted in recesses to direct light toward the test axis and a surface to reflect the LED light toward the patient's eye. A coating on the ring surface opposite the patient's eye improves the LED efficiency.

Abstract: A fundus camera, for taking photographs by fluorescence, has an illuminating optical system to illuminate a fundus. The illuminating optical system is provided with a diaphragm that can be adjusted to modify the illumination state of the fundus according to the light reflected from the fundus when taking photographs by fluorescence. As a result, a good photographic image of the fundus can always be obtained.

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 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 auxiliary lamp for a slit lamp device used in eye examination, to improve digital photography of the eye being examined, includes a casing and a fiber optic bundle terminating in a glued and polished end face, which end face forms a light emitting line. A cylindrical lens is positioned in front of the end face and is adjusted by a finger-operated screw device to be moved toward, and away from, the end face to focus the line of light.