Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 4544246 | System for producing selective stabilization of a portion of the retinal image A system is provided for producing a stabilized visual scotoma or aperture which comprises means for projecting the image of a visual scene along a first optical path including first and second mirrors positioned serially along the optical path. Both mirr... | 10/01/1985 |
| 4528989 | Screening method for monitoring physiological variables A screening method and apparatus suitable for diagnosing dyslexia which includes a television camera for detecting reflected light to track eye movements in response to projected visual stimuli. The loci of said eye movements are superimposed over the vis... | 07/16/1985 |
| 4402325 | Ophthalmic device to diagnose the eye fundus The present invention provides an ophthalmic device to diagnose the circulation of blood in an eye fundus by producing a pair of plethysmograms for synchronized comparison. A pair of fiber optic conduits are attached to a coupler that can be sealingly aff... | 09/06/1983 |
| 4397531 | Eye closure discrimination system A system for determining whether an eye within a field of view is closed for a predetermined period of time and for distinguishing between reflections from an open eye and any specular reflections within the field of view. The system comprises detection a... | 08/09/1983 |
| 4387974 | Circuit for calculating the position of the eye An eye position measurement circuit is disclosed for calculating the posin of the cornea of the human eye. The eye position measurement circuit includes a dual axis infrared light detector which will sense the position of the cornea of the eye upon recei... | 06/14/1983 |
| 4373787 | Accurate three dimensional eye tracker A three dimensional eye tracker, for measuring as a function of time the point in three dimensional space on which the eye is fixed, includes a portion which functions as a two dimensional double Purkinje eye tracker for measuring movement of the eye in r... | 02/15/1983 |
| 4300818 | Multifocal ophthalmic lens The specification discloses a multifocal ophthalmic lens to provide a variable focusing power lens for near and farsighted corrected vision. The lens includes a first and second lens element. First and second electrodes are disposed between the lens eleme... | 11/17/1981 |
| 4287410 | Double Purkinje eye tracker An eye tracker measures the point in space on which the eye is fixated. An input mirror reflects an input image into the eye and directs the Purkinje images so formed in the eye back into the eye tracker mechanism. The images are gathered by a collimating... | 09/01/1981 |
| 4264152 | Visual stimulus deflector A deflector, through which a subject views a target or visual stimulus, can independently move the visual stimulus horizontally and vertically to stimulate or compensate the subject's eye movement and can alter the optical distance to stimulate or compens... | 04/28/1981 |
| 4257688 | Eye examining instrument The instrument projects, to the anterior portion of a human eye, plural component beams images of which form a single mark image when said component beams are aligned, and inspects if said component images of the mark are aligned. The instrument is exactl... | 03/24/1981 |
| 4181408 | Vision compensation A vision compensation system includes a lens receiving frame with a pair of lens members, at least one of which has variable optical compensation capabilities. Carried by the frame are means for producing a signal as a function of the relative angular pos... | 01/01/1980 |
| 4169663 | Eye attention monitor A device for monitoring eye attention along an axis includes a telescope directed toward the eye, and a four quadrant photocell detector disposed at the image plane of the telescope. The four photocell outputs are summed to produce X, Y, and common mode s... | 10/02/1979 |
| 4149787 | Eye fundus camera In an eye fundus camera an optical system illuminates the eye fundus and a sensor detects the intensity of reflection from the eye. When the intensity of reflection is sufficient to indicate that the person being examined has blinked his eye, the photogra... | 04/17/1979 |
| 4146311 | Automatic visual field mapping apparatus A device for automatically mapping the visual field of a subject includes a concave, generally hemispherical viewing screen, with a plurality of light-conducting fibers extending thereto from the convex side of the screen. The other ends of the light cond... | 03/27/1979 |
| 4145122 | Method and apparatus for monitoring the position of the eye This invention relates to an apparatus for monitoring the position of the eye and generating an electrical signal based upon its displacement from a neutral position, such apparatus being characterized by a pair of eyeglasses modified to provide an infrar... | 03/20/1979 |
| 4105302 | Automatic refraction apparatus and method Apparatus and method provide for automatically measuring the refractive error of a subject's eye and thus the prescription for lens or eye glasses for correcting this error. Under the control of a programmed automatic data processing system, an objective ... | 08/08/1978 |
| 4102564 | Portable device for the accurate measurement of eye movements both in light and obscurity A portable device for accurately measuring horizontal and vertical movements of each eye of a subject by reflecting thereon non-modulated invisible infrared light and converting the movements into continuous voltages. The device comprises emitters and det... | 07/25/1978 |
| 4075657 | Eye movement monitoring apparatus An apparatus is disclosed for testing the eye movements of a viewer in response to visual stimuli, such as an advertisement, displayed on a screen. One camera cooperates with a light source to detect eye movements indicated by a light beam deflected off t... | 02/21/1978 |
| 4059348 | Objective plotting of visual fields by eye movement monitoring An apparatus for measuring and evaluating a subject's visual field presents a target image, consisting of a spot of light, at a series of selected locations within the subject's visual field. Means are provided to monitor his resulting eye movement and po... | 11/22/1977 |
| 4034401 | Observer-identification of a target or other point of interest in a viewing field A head-up display system in a military aircraft provides projection of flight and weapon-aiming information into the pilot's line-of-sight through a partially-transparent reflector. The pilot operates a button firstly when he recognizes a target viewing t... | 07/05/1977 |
| 4003642 | Optically integrating oculometer An improved oculometer yielding simplified data accumulation and reduction techniques because of the use of a cylindrical lens system which optically integrates the light reflected from the eye being studied. The use of the cylindrical lens system and a l... | 01/18/1977 |
| 3992087 | Visual acuity tester A device for objectively determining visual acuity includes a viewing screen on which a moving spot of light of diminishing intensity is projected. Infrared eye tracking sensors scan the eyes of the subject and generate a voltage analog signal of the eyes... | 11/16/1976 |
| 3986030 | Eye-motion operable keyboard-accessory An eye-motion operable keyboard-accessory includes light source means for directing a light ray at an eye of an operator, for obtaining a light reflection therefrom, and a plurality of light-responsive sensors selectively actuable by the operator-reflecte... | 10/12/1976 |
| 3984156 | Objective plotting of visual fields by eye movement monitoring An apparatus for measuring and evaluating a subject's visual field presents a target image, consisting of a spot of light, at a series of selected locations within the subject's visual field. Means are provided to monitor his resulting eye movement and po... | 10/05/1976 |
