578results about "Phoropters" patented technology

A wearable ophthalmic device is disclosed. The device may include an outward facing head-mounted light field camera to receive light from a user's surroundings and to generate numerical light field image data. The device may also include a light field processor to access the numerical light field image data, to obtain an optical prescription for an eye of the user, and to computationally introduce an amount of positive or negative optical power to the numerical light field image data based on the optical prescription to generate modified numerical light field image data. The device may also include a head-mounted light field display to generate a physical light field corresponding to the modified numerical light field image data.

A system and method for helping ensure that a user of a computer is set up to optimally view the computer monitor under optimal conditions in order to minimize eyestrain. The system includes determining an optimal viewing distance and monitoring the distance of a user from the computer monitor during use of the computer. The system further includes notifying the user when they stray from the optimal viewing distance and further may include testing various aspects of the user's eyesight during use of the computer monitor.

Systems and methods are provided for improving overall vision in patients suffering from a loss of vision in a portion of the retina (e.g., loss of central vision) by providing symmetric or asymmetric optic with aspheric surface which redirects and / or focuses light incident on the eye at oblique angles onto a peripheral retinal location. The intraocular lens can include a redirection element (e.g., a prism, a diffractive element, or an optical component with a decentered GRIN profile) configured to direct incident light along a deflected optical axis and to focus an image at a location on the peripheral retina. Optical properties of the intraocular lens can be configured to improve or reduce peripheral errors at the location on the peripheral retina. One or more surfaces of the intraocular lens can be a toric surface, a higher order aspheric surface, an aspheric Zernike surface or a Biconic Zernike surface to reduce optical errors in an image produced at a peripheral retinal location by light incident at oblique angles.

A method for diagnosing impairments of a subject's gaze stabilization system is provided. The method includes measuring the subject's static visual acuity to obtain an assessment, setting at least one test parameter based on the assessment, measuring the subject's dynamic visual acuity using the test parameters to obtain a first dynamic measurement and a second dynamic measurement, and determining an impairment of the subject's gaze stabilization system using the assessment and the first and second dynamic measurements.

Medical tests and examinations are performed with consumer computing devices. The medical tests and examinations are selected and customized in accordance with conditions present in the testing environment, as well as physical characteristics of a user taking the test. The tests can include visual acuity tests, colorblindness tests and other medical tests, such as hearing tests.

An automatic self-service vision screening kiosk and method that allows individuals to screen their eyesight without assistance. The device carries out subjective and / or objective testing via an interactive video and software program that measures visual acuity and contrast sensitivity. The invention is designed to provide a report with test results. The device and method may also provide a means for making referrals, scheduling appointments, ordering lenses, dispensing lenses and / or forwarding prescriptions to eye care professionals or lens manufacturers.

One embodiment is directed to a system comprising a head-mounted member removably coupleable to the user's head; one or more electromagnetic radiation emitters coupled to the head-mounted member and configured to emit light with at least two different wavelengths toward at least one of the eyes of the user; one or more electromagnetic radiation detectors coupled to the head-mounted member and configured to receive light reflected after encountering at least one blood vessel of the eye; and a controller operatively coupled to the one or more electromagnetic radiation emitters and detectors and configured to cause the one or more electromagnetic radiation emitters to emit pulses of light while also causing the one or more electromagnetic radiation detectors to detect levels of light absorption related to the emitted pulses of light, and to produce an output that is proportional to an oxygen saturation level in the blood vessel.

Unified vision testing and / or training kiosk may utilize display devices and input devices to administer a number of visual testing and / or training tasks to an individual. One or more display devices may provide desired resolution, geometry, and / or touch sensitivity. One or more input devices may receive inputs of different types from different positions relative to a display device. Methods of visual testing and / or training may utilize the one or more display devices, one or more input devices, and / or other types of equipment to evaluate and / or improve the visual abilities of an individual.

A vision test apparatus includes a viewing assembly connected to a chassis wherein the viewing assembly creates an optical path between an image display and at least one front lens. A near / far assembly includes a secondary lens selectively operable with the front lens to create virtual visual distances. An optional transparent panel intersects the optical path and operates at least partially obscure the image display so that the vision testing apparatus has a means to isolate a portion of the image display. A lifting mechanism is operable to raise or lower the viewing assembly for patients of various heights. The viewing apparatus is also rotatable independently of said chassis to present natural lines of sight to a patient during near and far testing.

Techniques for a visual disability detection system that employs virtual reality to assess visual performance of a patient based on activities of daily living are described. The virtual reality platform can integrate the testing of different components of visual function based on activities of daily living to provide a direct and clinically relevant measure of the impact of any visual disability on a patient's daily life. By simulating daily tasks for evaluation of visual disability, clinicians can better understand from a patient's perspective how visual impairment affects their daily tasks and quality of life.

Systems and methods for providing a video game to map macular visual acuity comprising a multiple choice test where the fixation point is ensured by brief simultaneous presentation of both a central and pericentral targets. The game may be implemented on a hardware platform including a video display, a user input device, and a video camera. The camera is used to monitor ambient light level and the distance between the device and the eyes of the test subject. The game serves as a macular acuity perimeter that produces a map of the acuity of an eye that may be compared with normative data. The type of acuity tested is preferably Vernier acuity, but resolution acuity can also be tested. The test results are transmitted to a health care professional by telecommunications means to facilitate the diagnosis or monitoring of age-related macular degeneration or other relevant eye diseases.

A visual acuity examination is performed on a patient by bringing a confocal imaging apparatus up to a patient's eye. Stimuli at various points in the patient's field of view are generated while the patient fixates on a point. The patient's responses to the stimuli are recorded with the movement of the eye with is tracked with the aid of the confocal imaging apparatus. The position of said stimuli on the retina is corrected to take into account any movement of the eye between stimuli.

A subjective refraction technique uses a plane wave light source including substantially a point as a viewing target. The refraction method provide for a number of distinct identifiable end points. By finding such end points the process leads to an aberration-corrected vision. A defocus corrector assembly (DCA) includes a lens that is moveable along an optical axis between a patient's eye and the point light source for adjusting defocus power until the patient indicates that the blurry image has become a relatively focused line image. An astigmatism corrector assembly (ACA) which is capable of continuously variable in its amplitude is provided including a pair of astigmatism plates for adjusting astigmatism power and axis angle. The ACA is adjusted until the patient indicates that the line image has become a substantially round image. A reference marker provides displayed items including a sweep line overlapping at the point source and having an orientation which is adjustable. The patient may subjectively control the sweep angle of the sweep line and indicate that the sweep line is aligned with the sharp line image of the point source, thereby providing axis angle data of astigmatism errors of the patient's eye.

A method for isolating and quantifying impairments of a subject's gaze stabilization system is provided. A subject's static visual acuity is measured to arrive at an assessment. The subject's visual acuity is then measured when the subject's head is moving and a display object is fixed to arrive at a first dynamic measurement. The subject's visual acuity is also measured when the subject's head is fixed and the display object is moving to arrive at a second dynamic measurement. The assessment and the first and second dynamic measurements are then used to determine an impairment of the subject's gaze stabilization system.

An optical wavefront correction plate incorporates a unique, three-dimensional spatial retardation distribution utilizing the index of refraction change of resin mixture in its cured state. The optical wave plate comprises a pair of transparent plates, containing a layer of a monomers and polymerization initiators, such as resin mixture. This resin mixture exhibits a variable index of refraction as a function of the extent of its curing. Curing of the resin mixture may be made by exposure to light, such as ultraviolet light, and may be varied across and through the surface of the resin mixture to create a particular and unique three-dimensional wavefront retardation profile. The optical wave plate provides improved performance in large area mirrors, lenses, telescopes, microscopes, and ophthalmic diagnostic systems.

A system and method of testing vision performance includes displaying a visual recognition test to a subject and receiving from the subject a response to the visual recognition test. After receiving the response to the visual recognition test, a subsequent visual recognition test is selected based on the response received from the subject, the subsequent visual recognition test is displayed, and a response is received from the subject. The subsequent visual recognition tests are repeated until a predetermined criterion is reached. A vision performance score is determined based on the visual recognition tests displayed and the set of responses received from the subject and output from the system.

Optical devices, systems, and methods can produce and / or measure cylindrical (as well as spherical) lens shapes throughout a range of both powers and cylindrical axes. Fluid focus lenses employ electrical potentials to vary the shape of a fluid / fluid interface between two immiscible fluids having differing indices of refractions by controlling localized angles between the interface and a surrounding container wall. Spherical power, cylindrical power, and cylindrical access alignment may be varied with no moving parts (other than the fluids).

Systems and methods are provided for obtaining sight screenings, optical prescriptions and fittings for eyeglasses and contact lenses. A system can be self-operated through a voice-activated response system that enables an individual to determine one's own refraction, or can be operated with the assistance of a technician. A plurality of customer diagnostic locations can include digital equipment and optical instruments to conduct the sight screening. The data generated at these locations can be transferred to a remotely located eye doctor who interacts with a customer via a live audio-video connection to assist with interpreting the data, diagnosing the customer and operating the instruments at the locations. The eye doctor diagnoses, consults and authorizes the prescriptions for the customer. The customer's data can be sent to a lens laboratory to enable the fabrication, purchasing, and delivery of eyeglasses or contact lenses.

Novel vision monitoring, screening, and testing tools and help-seeking enablers that may be used individually as or in combination with other vision monitoring and screening testing systems that improves patients' ability to recognize the onset and progression of visual changes over time. Patients' ability to identify acute or chronic visual conditions on their own may drive earlier help-seeking behavior by the patient, enable earlier clinical diagnosis by an eye care specialist, and therefore resulting in earlier treatment and reduced likelihood of severe vision loss.

The present invention provides methods, devices, and systems for automated measured correction of the eyes and provision of sunglasses and eyeglasses for individuals, including individuals with a visual acuity of 20 / 20 or better.

Provided is an optometer capable of recording an examination result without making an error even in a case of using an apparatus with a structure to mechanically display the examination result. The optometer includes a phoropter (120), an imaging device (2) for taking an image of the phoropter (120), the image including a display portion of the phoropter (120), a display position specifying portion (135b) for analyzing the taken image and specifying a position of the display portion in the taken image, a display content acquisition portion (135c) for acquiring display contents (examination results) of the display portion whose position is specified, and a display control portion (135d) for displaying the acquired examination results on a monitor portion (131). The display portion includes a PD display portion (122), a spherical power display portion (161), a spherical power display portion (162), a cylindrical axis display portion (164), and a rotary prism portion (155).

An ophthalmic apparatus includes: a fundus observation optical system for observing a fundus; a target presenting device including a scanning member for two-dimensionally scanning a visible laser beam emitted from a laser source, the device being configured to control emission of the laser source during two-dimensional scanning by the scanning member to project predetermined target on the fundus under observation through the fundus observation optical system; and control means to change an irradiation diameter of the laser beam by inserting / removing an optical member into / from an irradiation optical path of the laser beam or moving the optical member in an axial direction and to change resolution of the target by changing each scan range of the laser beam by the scanning member according to the changed irradiation diameter of the laser beam. Accordingly, in the ophthalmic apparatus used in close and face-to-face position to an examinee, the size and shape of a target to be presented can be easily set. A test target with high resolution unrealizable by a conventional LCD can be presented.

An optometric apparatus and an optometric method includes the steps of acquiring subject's attributes and an orientation selected by the subject on an astigmatic axis determination chart displayed on the computer screen, displaying vision measurement charts in the acquired orientation and the orientation perpendicular thereto to acquire visual recognition limits selected by the subject, calculating far point distances based on the acquired visual recognition limits and the acquired subject's attributes, and calculating a refractive power based on the acquired orientation and the calculated two far point distances. The far point distance is calculated using a neural network that has been determined by a number of subjects in advance. The astigmatic axis determination chart has four groups of a plurality of parallel lines, each group having lines arranged in their respective orientation, and the vision measurement chart has a plurality of light and dark line images of different sizes, thereby reducing the risk of presenting an erroneous refractive power.

An electric joystick mechanism for an ophthalmic apparatus which is capable of improving manipulation performance of a joystick and is simple in structure comprises a base, a joystick having a shaft, a driving unit having a motor for moving an ophthalmic examination unit horizontally, and a control unit for controlling the driving unit in response to tilting manipulation of the joystick by an examiner, wherein the control unit performs first control of finely moving the examination unit by controlling the driving unit based on a manipulation signal of the joystick, and second control of roughly moving the examination unit by controlling the driving unit when tilting condition of the joystick becomes a predetermined tilting condition, and in the second control, velocity of driving of the driving unit is controlled based on velocity of the tilting manipulation of the joystick in the first control.