Matches 251 - 300 out of 435 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
5141303 Method and apparatus for discriminating eye fundus blood vessels  
Light beams of predetermined different wavelengths are projected into an eye fundus and light scattered therefrom is detected to distinguish blood vessels from surrounding tissue in the eye fundus....
5135299 Surgical operation microscope  
A surgical operation microscope has an observing optical system for observing an eye through an objective lens, and an illuminating optical system for illuminating the eye. The illuminating optical...
5116114 Ophthalmologic apparatus  
An ophthalmologic apparatus can measure the eye axis length of an eye to be examined and other information of the eye to be examined (for example, the cornea refractive power). In the case of the...
5114222 Method and apparatus for perimetry  
A perimetry system uses pupillary light response to a small bright light spot or other suitable stimulus which moves at a constant speed in generally a circular path centered on a fixation mark...
5074307 Ophthalmological diagnosis apparatus  
An ophthalmological diagnosis apparatus is provided in which a laser beam is projected at a region of the eye fundus to produce a laser speckle pattern formed by light scattered from tissues of the...
5070883 Eye movement analyzing device utilizing pupil center-of-gravity data  
A goggle type eye movement analyzing device which can be mounted on examinee's head incorporating a pair of eyepieces positioned in front of the eyes. Each eyepiece includes a light source, a...
5071245 Ocular refracting power measuring system  
An ocular refracting power measuring system includes a projector system for projecting the image of a light source on the eyeground of an eye to be tested and a light receiving system for...
5066117 Perimeter  
A perimeter has a predetermined index to be projected onto a fundus of an eye to be examined and an index projection imaging optical system which can form an intermediate image of the index in...
5066116 Optical system in a laser scanning eye fundus camera  
The present invention relates to the optical system in a laser scanning eye fundus camera. The optical system comprises an illuminating optical system for scanning an eye fundus with an...
5042940 Optical measuring apparatus for examining eye  
An optical measuring apparatus for examining an eye which automatically aligns the optical axes of said apparatus and the eye with each other and focusing the light emitted by said apparatus on the...
5042938 Apparatus for measuring length of visual line length, depth of anterior chamber, thickness of crystal lens, etc.  
A measuring apparatus has a model eye for measuring a distance from a first objective surface to a second objective surface, an observation optical system for observing an interference between...
5011276 Apparatus for measuring refractive power of eye  
An apparatus for measuring the refractive power of eye having an optical measuring device provided with a measuring optical system and a main body for calculating the refractive power of eye based...
5002385 Target device used in eye movement tests  
A target device used in an eye movement testing device made up of a light group and a refractor. The light group includes a plurality of light sources lined-up side by side behind an window which...
4999009 Device for use with a cornea shape measuring apparatus  
The corneal reflection virtual image of an index mark for cornea shape measurement is displaced by a variation in the working distance, but a light beam regulating device for extracting the corneal...
4997269 Scheiner-principle pocket optometer for self evaluation and bio-feedback accommodation training  
A method and optometer apparatus for measuring the accommodative state of eye of a subject is disclosed. In a preferred embodiment, the optometer apparatus includes: a pinhole aperture plate having...
4991584 Ophthalmic examining apparatus and method capable of examining glaucoma  
An ophthalmic examining apparatus which is provided with at least non-contact type eye pressure measuring means and eye fundus observation means for observing the fundus of an eye to be examined...
4964715 Comparative surgical keratometer  
A keratometer designed to be attached to a conventional ophthalimic surgical microscope for use in measuring the power and angle of orientation of an astigmatism of the cornea of an eye. The...
4960327 Optical system in a lasar scanning eye fundus camera  
The present invention relates to the optical system in a laser scanning eye fundus camera. The optical system comprises: an illuminating optical system for scanning an eye fundus with an...
4957360 Ophthalmic disease detection apparatus  
An apparatus for detecting ophthalmic diseases such as inflammation in the camera oculi of a patient's eye. A laser beam is focussed at a selected spot in the camera oculi of an eye, and the light...
4953968 Automated visual assessment system with steady visual evoked potential stimulator and product detector  
An automated visual testing system is disclosed which presents an alternating steady state visual stimulus to a patient through an optical system that modifies the stimulus image. As the image...
4952049 Apparatus for measuring the refraction of eye  
An eye refractometer comprising a projection optical system for projecting an index mark onto an eye fundus of an eye to be examined through a first aperture stop disposed substantially conjugate...
4952050 Ophthalmological diagnosis method and apparatus  
Disclosed is an ophthalomological diagnosis method and apparatus in which a blood vessel in the eye fundus is illuminated with a laser beam of a predetermined beam spot whose diameter is...
4943151 Scheiner-principle vernier optometer  
In a preferred embodiment, the optometer apparatus includes: a pinhole apure plate having first and second horizontally positioned apertures disposed on opposite sides of a first optical axis;...
4938584 Ophthalmic diagnostic method and apparatus  
An ophthalmic diagnostic method and apparatus measures the distance between the corneal surface and the fundus of an eye being examined by projecting a beam of coherent light at the eye and varying...
4917480 Eye refractive power measuring apparatus  
An eye refractive power measuring apparatus is disclosed. It includes a chart projection system for projecting a chart image for test use to a retina of an eye under test by using visible light, a...
4887897 Eye examining apparatus  
An eye examining apparatus has an eye examining lens of an elastic material opposed to an eye to be examined, and control means for causing the marginal portion of the eye examining lens to...
4870964 Opthalmic surgical device and method with image data reflected off of the eye  
Method and apparatus providing to a medical practitioner visual feedback of information revelant to a surgical or therapeutic procedure are described. Vacuum and pressure conditions are sensed by a...
4859051 Eye testing apparatus  
An eye testing apparatus, in which a cornea reflecting image and a retina reflecting image formed by projecting each target mark image onto a cornea and a retina of an eye to be tested are...
4856891 Eye fundus tracker/stabilizer  
An eye movement tracker for stabilizing in two dimensions a diagnostic, treatment or other ophthalmic illumination on the fundus has a laser source which produces a narrow directed tracking beam,...
4848895 Automatic eye refractive power measuring apparatus  
There is disclosed an automatic eye refractive power measuring apparatus for automatically measuring refractive power of an eye under test by means of objective measurement. It comprises a...
4848896 Eye refractometer  
The present invention is directed to an eye refractometer, one embodiment of which, includes two-aperture stops positioned substantially conjugate with the pupil of the eye to be examined. Further,...
4846568 Method of analyzing an electroretinogram  
A method of separating an oscillatory potential wave from an electroretinogram of a subject which contains an "a" wave, a "b" wave and said oscillatory potential wave that overlap each other. The...
4838682 Ocular topology system  
Topological information of the cornea and anterior chamber of an eye is optically developed by projecting toward said eye a target image sharply focused in a movable flat plane. As the plane is...
4834529 Apparatus and method for determining the symmetry of a surface  
Disclosed is an apparatus and method for determining the symmetry of a light reflecting surface by superimposition and comparison of a first reflected image ("first image") upon the same image...
4834528 Infrared photoretinoscope  
A retinoscope utilizing a plurality of infrared light sources each positioned at a difference distance, or eccentricity, from the optical axis of a camera is disclosed. The plural light sources are...
4832480 Differential diagnosis of sensory abnormalities using a normalized, ratiometric analysis of steady state evoked potentials  
A method for testing the visual system to detect the presence of disease, and to distinguish disease which has degraded the linear visual pathway from disease degrading the nonlinear visual pathway...
4828381 Automatic visibility correction viewfinder system for optical devices  
A viewfinder system for cameras and the like which automatically corrects its visibility to accommodate the particular version of the viewer. A lens in the viewfinder optical system, which is...
4820037 Apparatus for measuring the refractive power of an eye  
An apparatus for measuring the refractive power of an eye has a target projecting system for projecting a target light beam onto the fundus of an eye to be examined through a predetermined region...
4810083 Binocular indirect ophthalmoscope  
The invention provides a binocular indirect ophthalmoscope in which light reflected from an eye under test is split and guided to left and right oculars (7, 8). Left and right mirrors (10, 11) for...
4807989 Surgical microscope system  
A surgical microscope comprises an illuminating light source for observation and/or photographing, an observation optical system, an index projecting optical system and a cornea configuration...
4793700 Gaze-fixing device for surgical microscope  
A gaze-fixing device for a surgical microscope which is capable of providing a marking without an error at the time of a radial keratotomy operation. The device comprises a gaze-fixing target which...
4786163 Auto-keratometer  
An auto-keratometer attached to an operating microscope to measure the refraction and astigmatic condition of the cornea comprises a cornea irradiating light source section disposed below the...
4772114 Dynamic optometer  
In a dynamic optometer, a variation in the direction of a subject's eye, namely, in the direction of gaze is measured by a direction detector to tilt a bi-axial rocking mirror according to the...
4770523 Apparatus for measuring curvature  
Apparatus for measuring curvature of an object automatically is so composed to guide two radiation beams reflected by the object to a linear image sensor, and determine the curvature of the object...
4764006 Ophthalmic measuring apparatus  
An ophthalmic measuring apparatus has an ultrasonic detector for measuring the length of a predetermined region of an eye to be examined, a device provided with a center axis coaxial with the...
4761070 Eye refractometer  
An eye refractometer is disclosed. It comprises a projection optical system including a light source portion and an objective lens disposed opposite to an eye under test, and a ring-shaped...
4758080 Pointspread retinoscope  
A simple pointspread retinoscope and method of retinoscopy is described. The retinoscope consists of a variable radius shield mounted on a light source, to provide variable eccentricity between the...
4755041 Eye refractive power measuring apparatus  
An eye refractive power measuring apparatus having a unit for projecting a plurality of index images onto the fundus of an eye to be examined, a unit for detecting the eye fundus reflected light...
4755043 Portable scanning digital pupillometer and method of use thereof  
A portable, hand-held, dynamic, automatic scanning, measuring and recording device capable of inspecting holes and measuring gaps in any animate or inanimate object of up to about 10 millimeters in...
4750830 Method and apparatus for monitoring blood-glucose concentration by measuring focal properties of the eye  
Optical power of a living subject's eye is measured and compared with a calibration value that corresponds to a reference blood-glucose level. The reference level is determined conventionally, as...
Matches 251 - 300 out of 435 < 1 2 3 4 5 6 7 8 9 >