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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 5971543 | Method of measuring metabolic activity employing an anomaloscope In this device, we employed four sets (or three sets) of different wavelength light sources and mixed each other to form the Moreland's color matching equation (a 580 nm+b 480 nm=c 440 nm+d 500 nm) or the Rayleigh's color matching equation (a 590 nm=b 546... | 10/26/1999 |
| 5956126 | Optical instrument and method for the treatment of amblyopia A method and apparatus for treating muscular disorders of the eye. The method comprising placing an object in front of the patient at a predetermined distance and placing a binocular optical system comprising lenses and prisms between the objects and the ... | 09/21/1999 |
| 5956125 | System and method for screening for dementia An easily administered, non-invasive, sensitive and specific system and method for screening persons for dementia, particularly dementia of the Alzheimer's type, is provided. The system and method include means for irradiating the eye of a person with lig... | 09/21/1999 |
| 5949521 | Method and apparatus for improving vision and the resolution of retinal images A method of and apparatus for improving vision and the resolution of retinal images is described in which a point source produced on the retina of a living eye by a laser beam is reflected from the retina and received at a lenslet array of a Hartmann-Shac... | 09/07/1999 |
| 5946075 | Vision screening system A method for detecting the presence of eye disease in a human eye. A test subject is presented with a fixation target positioned on a colored planar surface. The test subject focuses a test eye on the fixation target and positions the test eye a sufficien... | 08/31/1999 |
| 5933210 | Ophthalmological method and instrument for producing dichoptic stimuli A method for presenting two simultaneous images having respective cross-sectional areas A1 and A2, on respective first and second 2-dimensional image arrays so as to be seen by an observer as a dichoptic stimulus of substantially equ... | 08/03/1999 |
| 5929972 | Communication apparatus and method for performing vision testing on deaf and severely hearing-impaired individuals An apparatus and method for communicating to a deaf or severely hearing impaired individual while vision testing utilizing indicator lights (52A), (52B), (52C), and (52D) positioned in the same plane as a visual acuity test chart (54) having optotypes (50... | 07/27/1999 |
| 5920375 | Process for measuring the visual field recognizable by the eye of a patient A perimetric structure and a testing process having a digitalized camera mechanism for storing the image and evaluating with a visual field testing device, in which the individual testing points of varying size and varying contrast are sequentially offere... | 07/06/1999 |
| 5914772 | Method and device for testing eyes The present invention relates to a device and methods for testing eyes. This method is objective in nature and can be performed by a technician, only requiring specialized personal to interpret the final prescription. The method comprises: Obtaining autor... | 06/22/1999 |
| 5912721 | Gaze detection apparatus and its method as well as information display apparatus Apparatus disclosed herein includes an information presentation section 120 for performing presentation of information selected, a gaze-point detecting section 130 for estimating the user's gaze point, a display change section 150 for changing the display... | 06/15/1999 |
| 5912723 | Method and apparatus for early detection of glaucoma A diagnostic test for glaucoma which preferably uses four types of frequency doubled illusion patterns to determine the existence of glaucomatous damage in different regions of the eye. The four frequency doubled illusion patterns are preferably generated... | 06/15/1999 |
| 5898474 | Visual field testing method and apparatus A method and apparatus are disclosed for using virtual reality for testing and quantifying visual information from the eye, the visual pathways, and the brain. Headgear configuration allows the patient to observe a field of view into which sequenced test ... | 04/27/1999 |
| 5894340 | Method for quantifying optical properties of the human lens Method for quantifying optical properties of the human lens. The present invention includes the application of fiberoptic, OMA-based instrumentation as an in vivo diagnostic tool for the human ocular lens. Rapid, noninvasive and comprehensive assessment o... | 04/13/1999 |
| 5892570 | Method and apparatus for measuring and correcting metamorphopsia A method and apparatus are provided for the evaluation and measurement of metamorphopsia. The apparatus includes a pattern generator that displays a deformable pattern, such as an Amsler grid, on a computer monitor. The rectilinear grid includes substanti... | 04/06/1999 |
| 5886768 | Apparatus and method of imaging interior structures of the eye An apparatus and method provides images of the anterior structure of the eye which can be captured. Various slit lamp projections are captured by a camera utilizing a CCD along the line of sight axis so that all images which are taken are referenced to th... | 03/23/1999 |
| 5886770 | Device for use in the examination of the visual field of a subject A visual field test device (10) is disclosed which allows a larger area of the visual field to be examined and allows use of the device for testing for diseases of the eye and brain, for example, glaucoma. The device consists of a chart (12) which has vis... | 03/23/1999 |
| 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 plurality of similar appearing numbers to determine if they are a... | 03/16/1999 |
| 5880811 | Infant eye trainer for a baby bottle An infant eye trainer (10) for a baby bottle (12) comprising a structure (14) for gripping the baby bottle (12). An extension member (16) extends from the gripping structure (14). A visually attractive ornament (18) on a distal free end of the extension m... | 03/09/1999 |
| 5880812 | Method and apparatus for evaluating and mapping visual field A method for examining a visual field of a subject includes the steps of stimulating the subject eye movement reflex to an off field visual stimulus and mapping the subject visual field based on a positive reflex to the stimulus. An apparatus (20) for eva... | 03/09/1999 |
| 5880813 | Retinal diagnostic device An ophthalmological diagnostic system and method providing improved resolution and enhanced visualization of internal anatomical structures of the eye. The optical transform of light reflected and scattered by the internal anatomical structures of the eye... | 03/09/1999 |
| 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 apparatus, if a user sets an eye examination mode by an eye... | 03/02/1999 |
| 5864385 | Method of determining the perimeter of the visual field of the human eye A multiplicity of test sites determined by coordinates are stipulated in the visual field. This is done in such a way that at least one further test site is present within a specific circle around each test site and a stimulus is applied only once at each... | 01/26/1999 |
| 5864381 | Automated pupil remapping with binary optics Methods and apparatuses for pupil remapping employing non-standard lenslet shapes in arrays; divergence of lenslet focal spots from on-axis arrangements; use of lenslet arrays to resize two-dimensional inputs to the array; and use of lenslet arrays to map... | 01/26/1999 |
| 5859686 | Eye finding and tracking system A system and method for finding and tracking the location of a subject's eyes. This system and method employs an imaging apparatus which produces digital image frames including the face and eyes of a subject. An eye position finding and tracking apparatus... | 01/12/1999 |
| 5838420 | Method and apparatus for ocular motility testing Apparatus for ocular motility testing comprising, an item of headgear 5 onto which is mounted: gaze-detection means 25 for determining the visual axis directions of one or both eyes of an observer 14 wearing the headgear in relation to a reference primary... | 11/17/1998 |
| 5835192 | Contact lenses and method of fitting contact lenses A design family of contact lenses includes a central area utilized for distance vision, surrounded by multiple alternating annuli of near and distance optical powers, surrounded by a peripheral distance zone. The design can also be used in intraocular len... | 11/10/1998 |
| 5830147 | Method and apparatus for examining optic nerve head circulation A laser source attached to an ophthalmic observation instrument, such as a fundus camera, projects a spot, and a light collector is positioned in the image field of the instrument over the spot to collect return light scattered from a homogeneous tissue b... | 11/03/1998 |
| 5822037 | Automated dark adaptometer The present invention modifies the Goldmann-Weeker's dark adaptometer so that all testing may be done automatically and analysis of the data may be completed in a rapid manner and further varied. The automated dark adaptometer is composed of the standard ... | 10/13/1998 |
| 5822035 | Ellipsometer A system and method for the in-vivo measurement of optical characteristics of a cornea includes an ellipsometer which measures the phase shift in reflected light after it has passed through the cornea or been reflected from the retina. This ellipsometer h... | 10/13/1998 |
| 5815242 | Wide field scanning laser opthalmoscope A scanning ophthalmoscope which produces images of the rear surface of the human eye, and particularly of the retina, by utilising an aspherical mirror to reflect light beams, produced by multiple scanning laser light sources, into the retina. This ophtha... | 09/29/1998 |
| 5805270 | Device and method for testing field of vision An apparatus for performing assessments of field of vision that is portable, does not require the patient to adopt a particular posture or position relative to the testing device and may be operated so as to require minimal active responses from the patie... | 09/08/1998 |
| 5801808 | Method and apparatus for determining spectral sensitivity parameters of color-sensitivite receptors in the eye Method for determining spectral sensitivity parameters of color-sensitive receptors in the eye, in the course of which at least one testing light beam is introduced onto an area of the retina of an eye to be tested, and at least one sensitivity parameter ... | 09/01/1998 |
| 5801810 | Method and apparatus for testing visual attention capabilities of a subject A system for assessing subjects for inadequate visual attention capabilities presents a sequence of display screens to the subject on a conventional computer monitor. The display screens include a foveal target and a peripheral target, and may additionall... | 09/01/1998 |
| 5796463 | Apparatus and method for improving the operation of an autorefractor An apparatus to improve the operation of an autorefractor includes a first circuit to obtain objective refraction data and a second circuit to receive patient age data. An autorefractor output adjustment device is connected to the first circuit and the se... | 08/18/1998 |
| 5790235 | Method and apparatus to measure pupil size and position Embodiments of the present invention are method and apparatus for measuring the size and position of an eye's pupil, and for doing so rapidly. In particular, embodiments of the present invention are methods and apparatus for determining pupil size and pos... | 08/04/1998 |
| 5784145 | Apparatus for determining pupil dimensions A binocular apparatus for determining pupil dimensions for the eyes of a subject which include an optical imaging apparatus permitting images defining each pupil to be simultaneously transmitted along separate optical paths to a common optical sensing dev... | 07/21/1998 |
| 5777720 | Method of calibrating an observer tracking display and observer tracking display A calibration method is provided for an observer tracking display, for instance of the autostereoscopic 3D type, which forms steerable viewing zones and which comprises a tracking system for tracking an observer and a controller for controlling the viewin... | 07/07/1998 |
| 5767942 | Hand-held slit lamp apparatus and associated methods A hand-held slit lamp instrument has a substantially elongated handle that houses one or more batteries and that connects to a line filament lamp. A front knob is threaded to the handle so that it is rotatable about the elongated axis of the handle. The f... | 06/16/1998 |
| 5757461 | Method for displaying a photographing point of a cornea in an apparatus for obtaining video images of corneal cells A method for displaying a photographing point of a cornea which is used in an apparatus for obtaining video images of corneal cells. The apparatus includes (a) first optical assembly having a video camera provided in front of a subject eye for observing a... | 05/26/1998 |
| 5754274 | Field of vision collimator A field of view collimator for self-monitoring peripheral vision loss. The field of view collimator includes a hand-held housing having a viewing aperture for placement adjacent to the subject's eye. A lens projects an image to the eye. The image, in the ... | 05/19/1998 |
