Matches 51 - 100 out of 160 < 1 2 3 4 >
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5894339 Apparatus for presenting a test chart  
An apparatus for presenting a test chart for testing a visual performance of an eye to be examined, the apparatus comprising a test chart plate including a plurality of test chart pictures provided...
5888074 System for testing and evaluating driver situational awareness  
A system for testing and evaluating driver situational awareness incorporates a device for displaying road and traffic images to a subject being tested, road and traffic image data for simulating...
5883694 Method for the improvement of reading skills  
A quantitative visual test measures the rate at which an individual is able to complete a defined visual task, either on paper or on a self illuminated screen. The task involves comparing a...
5883693 Ophthalmic refractor  
An ophthalmic refractor is constructed to judge whether a visual acuity value of a symbol with a mask is minimum or maximum among values in a selected charts, select a chart containing a symbol...
5880814 Visual acuity tester with improved test character generation  
A visual acuity tester based on a personal computer is provided that is capable of displaying visual acuity test characters at varying sizes on a monitor. The visual acuity tester antialiases the...
5877841 Application and method for self eye examination using a video appliance  
Apparatus and method for eye examination by a video appliance which enables a person to conduct an eye examination, whenever required, especially by means of a remote controller. According to the...
5844660 Objectives refraction measuring apparatus  
An objective refraction measurement apparatus includes a separate chart having a pair of charts arranged separately, an optical system for projecting the separate chart to an eye to be examined...
5839970 Mallet-type putter and eye predominance determining method for golfers  
The head of a mallet-type putter includes on its upper surface indicia in the form of a first long line, a second short line, and a series of even shorter lines extending from the end of the short...
5825460 Visual function measuring apparatus  
A visual function measuring apparatus includes a visual target displaying device for presenting visual targets of different sizes successively to an eye to be examined, and a response inputting...
5801809 Eye chart with color vision screening  
The present invention is an improvement over existing methods of testing a patient for color perception. The present invention provides a means by which color perception can be tested at the same...
5764340 Portable device for evaluation of binocular vision problems  
A vision evaluation device which measures the three vision parameters of stereoscopic vision, fusion testing, and fusion recovery measurement. The device comprises a stereo-pair of images in...
5731863 Ophthalmic apparatus for inspecting a refractive power of an eye  
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...
5729324 Presbyometer including lockstep means  
A presbyometer for aid in selecting the appropriate strength of over-the-counter (OTC) reading glasses is disclosed. The device comprises a view assembly with a pair of rotational lens wheels. The...
5694199 Method and apparatus for performing automated vision performance tests  
An improved visual performance tester is provided which measures and stores very precise information concerning the visual sensitivity of a human eye, by use of a series of contrasting images on a...
5661539 Visual tool for assessing the ergonomic position of a video display terminal  
A novel apparatus for assessing and quantifying the ergonomic position of a video display terminal (VDT) is disclosed. In the preferred embodiment, the apparatus includes a substantially planar...
5629748 Visual function examination apparatus including binocular fixation target  
A visual function examination apparatus, comprising an optotype presenting device for presenting optotypes for use in examinations of visual functions of examinee's eyes, for examining visual...
5619291 Patient-user interactive psychotherapy apparatus and method  
A patient-user interactive psychotherapy apparatus for use in Eye Movement Desensitization and Reprocessing treatment is disclosed. The psychotherapy apparatus includes a pair of visual displays,...
5596379 Portable visual acuity testing system and method  
A portable visual acuity testing system and method is used to measure the visual acuity of a person being tested. The portable visual acuity testing system includes a portable visual acuity testing...
5592247 Apparatus and method to measure visual function under simulated nighttime conditions  
An apparatus and method for measuring visual function under simulated nighttime conditions where the pupil is large by maintaining extremely low ambient illumination when the test is performed in a...
5589898 Method and system for color vision deficiency correction  
The present invention is an apparatus and method for the testing of computer users for color vision defects, sometimes referred to as "color blindness," and then the automatic adjustment of color...
5589897 Method and apparatus for central visual field mapping and optimization of image presentation based upon mapped parameters  
A method and apparatus for testing individuals having a sub-optimal central field of vision so as to identify areas within the visual field in which images can be perceived and for determining...
5568209 Automated pocket-sized near vision tester  
A lightweight, pocket-sized, hand-held near vision test apparatus that selectively retroilluminates different near vision test objects located on an interchangeable near vision test card, or...
5552842 Process and apparatus for generating comparison image representative of actual subject view  
A segmented objective vision test is administered to a patient for determining a quantitative measurement of vision capability in the tested segments. Human vision can be tested in separate...
5550602 Apparatus and method for examining visual functions  
Examinations of the visual field required a spatially large system in the form of a perimeter or a (noise-field) campimeter with a microcomputer, a control and a video monitor. Additional testing...
5546142 Method and apparatus of optometry  
A method and apparatus of optometry, which lets a subject observe an optometrical target through a correcting optical system having a variable refractive power, are designed to measure the optical...
5543867 Method and apparatus for the amelioration for visual stress and dyslexia  
A quantitative visual test measures the rate at which an individual is able to complete a defined visual task, either on paper or on a self illuminated screen. The task involves comparing a...
5515118 Reflective stimulus for computer screen simulation for eye examinations  
A test card for use in eye examinations emulates the light return profile of a video display screen such as those commonly used in connection with computers. The test card is used for prescribing...
5486879 Portable, public use reading glasses eye tester  
Two identical plates somewhat in the shape of very large eyeglass frames sandwiching two rotable discs, one for each eye, form the front section of the device. Each disc has a series of magnifying...
5485230 Chromatic motion diagnosis system and methods  
A system and method are described for determining a subject's perceived motion ability utilizing chromatic pathways. The equiluminant point between two selected colors is determined and two similar...
5485231 Apparatus for visual acuity test having an adjustable mirror  
An apparatus for visual acuity test of an examinee's eye comprises test chart presenting device for changing and presenting test chart to the examinee's eye, a switch for designating test chart to...
5436681 Apparatus and method for screening individuals for ametropic conditions  
A vision screening apparatus and screening method that includes a myopic screening test image and a hyperopic screening test image. In one embodiment, each screening test image includes a test...
5430510 Equipment for testing visual acuity and/or sensitivity to spatial contrasts in humans, and a corresponding device and manufacturing process  
Equipment for testing visual acuity and/or visual sensitivity to spatial contrasts in humans comprises a sheet having a plurality of optotypes disposed on one of its faces, the optotypes being...
5420652 Visual acuity test mark displaying device  
A visual acuity test mark displaying device comprises: a test mark selecting means provided with a plurality of test mark selecting keys which are operated for the sequential selection of visual...
5416540 Apparatus for visual acuity test  
An apparatus for visual acuity testing by presenting visual test charts to an examinee by utilizing an electro-optic effect, the apparatus comprising a test charts displaying device in which test...
5381195 Method and apparatus for testing a subject's perception of visual stimuli  
In a method of testing a subject's perception of successively presented visual stimuli, a predetermined preliminary response time window is used at the beginning of the test to preliminarily...
5381196 Contrast sensitivity tester  
A device for testing visual contrast sensitivity is disclosed whereby the contrast between a vectographically polarized test symbol and a reference background may be continuously varied by changing...
5349397 Apparatus and method for determining a patient's dominant eye  
An examining device is provided which quickly and easily determines the "sidedness" of an individual's eyes. The device has a viewing port and conical opaque sidewalls which converge to a small...
5325136 Computer display screen simulation for optometric examination  
An improved vision tester apparatus and method are disclosed for use in conducting optometric examinations of patients who use video display terminals (VDTs). Specifically, the tester simulates...
5319399 Optical alignment device  
An optical device for aligning an instrument so that active zones in the instrument are the same distance from the plane of a remote object comprising a lens attached to the instrument, the lens...
5302982 Projector slide apparatus  
A projector slide apparatus for use in a duplex optical chart projector of the type used by optometrists and eye care professionals. The apparatus is insertable into and capable of variable...
5255027 Eye testing device  
A vision-testing apparatus includes a concave mirror and at least one test object (2) which can be changed in position and is arranged between the concave mirror (1) and its focal point (f) in a...
5223865 Method and apparatus for measuring visual function  
The inventive method and apparatus are based on the display of a striped target with constantly accurate contrast to the patient for finding a visual function disturbance associated with such eye...
5223866 Small, simple and cost-effective scheiner-principle optometer with computer interface for automated assessment  
A Scheiner-principle optometer for automated assessment of accommodative state is disclosed. The specific advantages of the instant invention over earlier ones are: a) simplicity of design, b) hand...
5220362 Ophthalmic lighting apparatus  
An ophthalmic lighting apparatus for operable attachment to ophthalmic articles, such as ophthalmic refractors, which articles are capable of supporting and deploying a protruding reading card rod,...
5191367 Instrument and method for use in optometric examinations  
An optical instrument for use in conducting optometric examinations which generates an alphanumeric type display simulating the optical features of displays provided by video display terminals. The...
5176147 Method and apparatus for detecting optic neuropathy  
A patient is presented with a series of sinusoidal gratings truncated at varying diameters in each quadrant of the visual field (superior nasal, inferior nasal, superior temporal, inferior...
5067806 Quick screening for scotopic sensitivity syndrome  
A device permitting the rapid determination of scotopic sensitivity syndrome comprised of small cards with colored filters on visual test patterns. The filter's frequencies correspond to the...
5065767 Method for use in diagnosis of glaucoma  
Existing techniques for diagnosis of glaucoma, namely observation of a scotoma, measurement of intraocular tension and assessment of color vision defects have drawbacks. The present invention...
5054908 Method and apparatus for evaluating human visual function  
A method and apparatus for evaluating a human visual function employ a set of test objects that have viewing surfaces. One viewing surface bears no visually perceptible pattern and hence is...
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...
Matches 51 - 100 out of 160 < 1 2 3 4 >