Matches 101 - 150 out of 160 < 1 2 3 4 >
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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...
4995717 Device for moving eye campimetry  
The computer-assisted moving eye campimetric device is a computer display of a moveable test grid having a central reference spot. The patient's eye is kept focussed on the spot by giving the...
4988186 Apparatus for quantifying visual function defects  
Apparatus for quantifying visual function defects comprises a plurality of testing elements (1) having a surface (3) provided with a selected visual stimulus (5) and with a machine readable code...
4979812 Method and graphics for achieving optimal lens correction for subnormal vision due to impaired retinas and undeveloped defective focusing abilities  
Patients suffering severe retinal damage and focusing impairment are examined in an area having actual or simulated outdoor illumination by viewing a large graphic having colored familiar objects,...
4968131 Visual acuity test device and method of preparing same  
A visual acuity testing device and method of preparing same are provided, the device being in the form of an optotype as well as a series of optotypes of the same nature, each of which is defined...
4859052 Portable screen assembly for visual acuity testing  
A portable screen assembly for use in combination with a series of visual acuity testing cards to test the visual acuity of an infant or otherwise functionally young (handicapped) person requiring...
4854695 Visual acuity testing  
A visual acuity testing device and method of preparing same are provided, the device being in the form of an optotype as well as a series of optotypes of the same nature, each of which is defined...
4838684 Apparatus for and method of testing visual acuity  
A hand-held, rotatable, cylindrical drum provided with a series of sequentially interchangeable stimulus patterns that cover the drum which, when rotated in front of a patient, induces optokinetic...
4818097 Ocular-pursuit measuring  
A unique technical process which must be taught is provided for quickly, simply, objectively and accurately measuring an individual's ocular tracking ability. The technique includes a process for...
4789234 Apparatus and method for testing the motion contrast visual sensitivity of an individual  
The motion contrast visual sensitivity of an individual is tested by means of a target having thereon patches each composed of alternating light and dark bars, with individual patches varying in...
4778267 Amblyopia screening  
Pre-literate children are screened for amblyopia utilizing a simple device. A pair of eyepieces are mounted by a static structure so that the fields of view through the eyepieces are segregated. A...
4753527 Visual acuity testing apparatus  
A visual acuity testing apparatus is herein disclosed which comprises a test chart displayer having a display surface pointing to an upward direction; a first reflector, for downwardly reflecting a...
4747682 Method and graphic to achieve optimal lens correction for subnormal vision due to impaired retinas and undeveloped defective focusing abilities  
Patients suffering severe retinal damage and focusing impairment are tested in an area having actual or simulated outdoor illumination by viewing a graphic having colored familiar objects and...
4740072 Vision testing apparatus  
A vision tester having a casing horizontally adjustable with respect to a base. Inside the casing a rotating drum has a first end rotatably fixed to the casing and a second end unconnected to the...
4714330 Device for detecting and/or measuring visual deficiencies  
The present invention relates to a device for detecting and/or measuring visual deficiencies in which an image observable by a patient presents several series of test signs, each corresponding with...
4660948 Eye chart  
An eye chart for use in a treatment program that includes eye exercises comprises a peripheral line defining a geometric shape and a pair of intersecting lines within the area defined by the...
4615594 Vision test chart and method using Gaussians  
A novel vision test device and method for measuring the ability of a subject to perceive contrasts is described, which comprises a chart for display to the subject having a plurality of visual test...
4611893 Eye chart for screening computer monitor operators  
The present invention relates to a novel visual acuity chart for testing operators of computers and other apparatus employing cathode ray tube monitors for potential vision problems.
4607923 Contrast sensitivity function measurement chart and method  
A novel device and method for determining the contrast sensitivity of a subject is provided and comprises a test chart including a plurality of patches systematically organized in a predetermined...
4597651 Apparatus for the detection of eye sight defects and cassette for the operation of such an apparatus  
The present invention relates to an apparatus for eye sight examination, allowing to test both of the patient's eyes, especially to detect his common failures and vision defects, for far and close...
4572629 Apparatus for presentation of eye tests for testing near and distant vision  
Apparatus for displaying eyesight tests for patients comprising a viewing station a test support having a plurality of eyesight tests selectively visible from the viewing station along first and...
4536065 Fixation device for eye testing  
A fixation device having primary utility in testing children's eyes is disclosed. The device comprises employing remote control of a variety of fixation targets to maintain the attention of the...
4526452 Method and apparatus for measuring contrast sensitivity  
A method is provided for testing the ability of a subject to visually perceive contrast between adjacent fields of different luminance. The subject is presented with a series of visual test...
4435052 Ophthalmic test apparatus having magnification compensation  
In apparatus for determining the refractive correction for a patient's eye, a plurality of similar test targets are presented to the patient simultaneously, with these test targets being viewed...
4421392 Apparatus for detecting visual field defects of the eye  
A perimeter for testing visual field light-sensitivity presents a moving spot or a set of fixed spots visually to a patient. The spot or spots have ill-defined edges so that the effect of visual...
4412729 Vision testing device  
A vision testing device, wherein projected or transilluminated indicia in the form of characters and/or symbols of different sizes and recognizabilities are shown to a subject under a test in a...
4408846 Method and apparatus for increasing visual acuity  
A method and apparatus for increasing visual acuity of a person wherein a target is selectively moved toward or away from the person to different positions at accurately determined distances...
4379699 Method of and means for improved reading efficiency of persons with specific dyslexia  
A method of and structure for improving the reading efficiency of persons with specific dyslexia. The method of effecting such improvement includes providing to the dyslexiac reading material...
4365873 Spatial frequency and contrast sensitivity test chart  
A chart and method for measuring and quantifying generalized visual sensitivity in terms of contrast sensitivity and spatial frequency response. The chart contains a multiplicity of grating patches...
4349250 Process and apparatus for the dynamic or static perimetry of the human eye  
A process and apparatus for dynamic or static perimetry of the human eye wherein topographical measuring threshold values of eye sensitivity for the eye being tested are obtained and are...
4324459 Optical test pattern  
A stelliform arrangement of sectors each having a uniform optical density and with different sectors having different optical densities.
4298253 Method and apparatus for presenting test images at different distances from a subject  
Method and apparatus for presenting test images to a subject at different distances and a constant visual angle. The test indicia are located at a single predetermined distance from the viewer. An...
4293200 Visual faculty testing apparatus  
Visual faculty testing apparatus is proposed to facilitate contrast sensitivity assessment. Existing procedures are limited and involve the presentation to a subject of a target of which the...
4257690 Eye testing chart  
An eye chart having a plurality of rows of letters where each letter is composed of a line-stroke having a plurality of adjoining black and white segments to provide an average reflectance which is...
4222639 Apparatus and system for analyzing fixation disparity  
Apparatus is provided for testing subjects for fixation disparity. The apparatus includes a first sheet-like element having an opening therein which is spaced from the subject being tested. This...
4070102 Apparatus for sensory control of a person undergoing test  
A sensory control apparatus to determine the visual acuteness of persons tested. The apparatus has at least one optical device to view images of figures provided by a step-by-step parade means. The...
3822693 METHOD FOR INDUCING HYPNOSIS  
A hypnotic state is induced in humans by placing a subject in a darkened chamber, applying stereo head phones to the subject, playing a pre-recorded hypnotic-inducing message through the ear phones...
3698800 VISUAL AND AUDIO PERCEPTION TESTING AND TRAINING APPARATUS  
Visual and audio perception testing and training apparatus comprising a satellite or tracking member of hollow construction provided with sound producing means for use as a source of audio signals...
3639042 APPARATUS FOR MEASURING THE ACUITY OF LOW-VISION PATIENTS  
An optical system for measuring the acuity of a low-vision patient has a variably magnified image of a reference character displayed on a rear vision screen. The image is effectively rotatable in...
3634003 OPTICAL SYSTEM FOR IMAGING SCHEINER APERTURES IN AN OPTOMETER  
In an optometer of the type employing Scheiner apertures, an optical system is disclosed for projecting those apertures into a plane proximate to the eye, most commonly the plane of the pupil....
3623799 TECHNIQUES FOR OBJECTIVELY MEASURING VISUAL ACUITY  
A technique for measuring either binocular or monocular visual acuity in which the subject's eye or eyes are stimulated by an oscillating target designed to induce an easily measured, large,...
3584931 BINOCULAR VIEWING INSTRUMENT  
Binocular viewing instrument having two viewing channels including two light entry apertures and two light exit apertures. Arranged near the entry and exit apertures, respectively, are reflecting...
3574450 METHOD AND APPARATUS FOR DETERMINING THE EFFECTIVENESS OF SPATIAL VISION  
A method and apparatus for testing the spatial vision of a subject by obtaining averaged evoked cortical responses produced by various patterned stimuli; and by obtaining such responses produced by...
3486813 VISION TESTING DEVICE  
3484155 HEAD MOUNTED ELECTRIC SQUINT LIGHT  
3469904 NIGHT VISION PERFORMANCE TESTER  
3419323 Eye testing and training apparatus incorporating optical projector and relatively rotatable target templates  
3355237 Visual acuity testing apparatus with test characters representing stylized human hand  
3328113 Night vision testing device  
3258303 Binocular vision training and testing instrument having interconnected rotatable reflector and target means  
Matches 101 - 150 out of 160 < 1 2 3 4 >