Abstract: A method for measuring an optical error of a subject comprises displaying to said subject stimuli comprising different levels of blurring.

Abstract: Method of calibrating a computerised colour vision test and method of testing colour vision on a computer The invention relates to a method of calibrating a colour vision test for testing colour vision under given ambient lighting conditions, which colour vision test is to be displayed on a colour display (12) of a computer (10) having at least one input interface (14), characterised by displaying a calibration test on the display (12) under given ambient lighting conditions to a person with normal colour vision before starting the colour vision test, displaying within at least one measuring region (31) of the display (12) a colour determination task requiring user input as a part of the calibration test, reading the user input through at least one input interface (14) of the computer (10), evaluating the read user input and determining as a result of the evaluation a display error resulting from a combination of a colour reproduction capability of the display (12) and an effect of the ambient lighting condit

Abstract: A head-mountable display (HMD) system includes at least one detector to detect a gaze direction of an eye of a user wearing the HMD, receiving circuitry to receive a user input from the user indicating a type of eye condition for the eye of the user associated with at least partial vision loss for a region of vision, a display unit to display one or more images to the user, and a processor to generate the one or more images for display to the user by the display unit in dependence upon the type of eye condition and an output of the at least one detector indicative of the detected gaze direction of the eye.

Abstract: An electronic device may include a lenticular display. The lenticular display may have a lenticular lens film formed over an array of pixels. The lenticular lenses may be configured to enable stereoscopic viewing of the display such that a viewer perceives three-dimensional images. The display may have a number of independently controllable viewing zones. A eye and/or head tracking system may use a camera to capture images of a viewer of the display. Control circuitry in the electronic device may use the captured images from the eye and/or head tracking system to determine which viewing zones are occupied by the viewer's eyes. The control circuitry may disable or dim viewing zones that are not occupied by the viewer's eyes in order to conserve power. An unoccupied viewing zone and an adjacent, occupied viewing zone may display the same image to increase sharpness in the display.

Abstract: A container closure includes a dosage body including at least one peripheral wall defining a containment chamber. The peripheral wall has an internal wall surface adjacent the containment chamber, the internal wall surface having a surface luminance. Indicia is carried by the internal wall surface, the indicia having an indicia luminance. A contrast between the surface luminance and the indicia luminance is at least about 0.67% on the Weber scale.

Abstract: Disclosed are assessment devices and methods to assess eyesight. In one embodiment, an eyesight assessment device includes a medium having one or more imaging functionalities and operable to project images for display based on the one or more imaging functionalities. The device also includes an optical source operable to project light and being positioned at one or more positions relative to the medium, such that at least one of images are projected from the medium based on the position of the optical source relative to the medium and the one or more imaging functionalities of the medium, where each image corresponds to an object provided for display at a virtual distance relative to a user of the eyesight assessment device, and where each image includes one or more of user assessable display characteristics that are indicative of a visual condition of the user.

Abstract: Described are various embodiments of an electronic device for a user having reduced visual acuity to fine tune a prescription thereof corresponding with their reduced visual acuity. The device comprises a digital light-field display, a hardware processor; and a non-transitory computer-readable medium having statements and instructions stored thereon for execution by said hardware processor in correcting an output image to be rendered by said digital light-field display in accordance with an image pre-filtering function, wherein said image pre-filtering function receives as input a light-field display optics parameter and a progressively adjustable vision correction parameter that corresponds to vision correction prescriptions.

Abstract: A 3D display element (2) comprising a plurality of emission regions (20) adapted to emit electromagnetic radiation (L), wherein at least some emission regions (20) are associated with a first group and at least some emission regions (20) are associated with a second group (21, 22), wherein by means of the emission regions (20) of the first group (21) respectively a pixel (100) of a first perspective (11) of an image (B) can be represented, and by means of the emission regions (20) of the second group (22) respectively a pixel (100) of a second perspective (12) of the image (B) can be represented the sum of all emission regions (20) is greater than the sum of all pixels (100) of all perspectives (11, 12).

Abstract: A mount assembly includes a stage including a base and one or more sidewalls extending upward from the base to define an elongated channel, and a holder including an elongated body having a first end portion and a second end portion opposite the first end portion, a bracket extending upward from the elongated body at the first end portion, and a foot extending upward from the elongated body at the second end portion. The elongated body is positionable within the elongated channel. An inspection device is extendable between the bracket and the foot.

Abstract: The invention relates to a method for reducing crosstalk on an autostereoscopic display, wherein the display comprises an array of pixels lined with a view altering layer, such as a lenticular lens stack or parallax barrier, which display further comprises an eye tracking system for determining the position of the eyes of a viewer relative to the display, which method comprises the steps of: —defining a common nonlinear physical model for a view altering layer portion corresponding to a pixel or group of pixels, which nonlinear physical model has at least one variable for the position of the respective pixel or group of pixels relative to the display, a variable for the viewing position of the eyes of a viewer relative to the display and parameters related to the variables; —calibrating the autostereoscopic display by repeating for all pixels or group of pixels of the display, the steps of: +obtaining calibration data by observing the visibility of a pixel or group of pixels from at least two viewing position

Abstract: In certain embodiments, vision defect information may be generated via a dynamic eye-characteristic-based fixation point. In some embodiments, a first stimulus may be displayed at a first location on a user interface based on a fixation point for a visual test presentation. The fixation point for the visual test presentation may be adjusted during the visual test presentation based on eye characteristic information related to a user. As an example, the eye characteristic information may indicate a characteristic of an eye of the user that occurred during the visual test presentation. A second stimulus may be displayed during the visual test presentation at a second interface location on the user interface based on the adjusted fixation point for the visual test presentation. Vision defect information associated with the user may be generated based on feedback information indicating feedback related to the first stimulus and feedback related to the second stimulus.

Abstract: A method for administering a cone contrast color vision test to a patient using a computer, including displaying a first character in a color at a first contrast level on a display connected to the computer, receiving a first input signal from the patient via an input device that indicates whether the patient recognizes the first character, displaying a second character in the color at a second contrast level which is not equivalent to the first contrast level, receiving a second input signal from the patient that indicates whether the patient recognizes the second character, assigning a score related to a cone sensitivity of the patient to the color at the first and second contrast levels, storing the score in a storage device, and comparing the score to at least one previous score from the patient to calculate a progression of a cone sensitivity loss.

Abstract: Systems and methods are provided for automated analysis of angiographic images. An angiographic imaging system is configured to capture a first image of a region of interest, representing a first time, and a second image of a region of interest, representing a second time. A registration component is configured to register the first image to the second image. A difference component is configured to generate a difference image from the first image and the second image. A pattern recognition component is configured to assign a clinical parameter to the region of interest from the difference image and at least one of the first image and the second image.

Abstract: Physical burden when a head-mounted display is mounted to the head of a user for use is reduced. A head-mounted display unit includes a head-mounted display, and a fixing stand configured so as to enable the attachment and detachment of the head-mounted display, and to enable the head-mounted display to be mounted in a fixed state. The fixing stand includes a base member, a support column projecting perpendicularly upwards from the base member, a pedestal mount attached to an upper end portion of the support column, a retaining member attached to the pedestal mount, a clamping implement, and a chin rest. The fixing stand is configured such that the head-mounted display is detachably mounted to the retaining member using the clamping implement.

Abstract: A subjective optometry apparatus includes a light projecting optical system that projects a target light flux to an examinee's eye, a fixed optical element that guides an image of the target light flux to the examinee's eye so as to have an optically predetermined examination length, a calibration optical system disposed in an optical path of the light projecting optical system to change optical characteristics of the examinee's eye, a measurement unit that accommodates the light projecting optical system; a positional information acquiring portion that acquires positional information of the measurement unit, a correction amount setting portion that sets a correction amount for correcting a projection magnification of the target light flux projected to the examinee's eye, based on the positional information, and a correction portion that corrects the projection magnification of the target light flux based on the correction amount set by the correction amount setting portion.

Abstract: Approaches for optimized computer display rendering for user vision conditions are provided. A computer-implemented method includes: detecting, by a computer device, a user at the computer device; sending, by the computer device, data associated with the user to a server; receiving, by the computer device, settings from the server; and automatically rendering, by the computer device, a display of the computer device using the settings.

Abstract: In certain embodiments, vision defect information may be generated via a dynamic eye-characteristic-based fixation point. In some embodiments, a first stimulus may be displayed at a first location on a user interface based on a fixation point for a visual test presentation. The fixation point for the visual test presentation may be adjusted during the visual test presentation based on eye characteristic information related to a user. As an example, the eye characteristic information may indicate a characteristic of an eye of the user that occurred during the visual test presentation. A second stimulus may be displayed during the visual test presentation at a second interface location on the user interface based on the adjusted fixation point for the visual test presentation. Vision defect information associated with the user may be generated based on feedback information indicating feedback related to the first stimulus and feedback related to the second stimulus.

Abstract: Systems and methods for improving the peripheral vision of a subject are disclosed. In one aspect, embodiments of the present disclosure includes a method, which may be embodied on a system, for improving peripheral vision of a subject using a visual marker on a display screen, the method includes, displaying a peripheral target on the display screen, the peripheral target having a visually discernable characteristic and determining whether the subject is able to correctly identify the peripheral target displayed on the display screen using the peripheral vision. The visual marker is intended for viewing using central vision of the subject and the peripheral target is intended for identification using the peripheral vision of the subject.

Abstract: An autostereoscopic 3D image display device using time division is provided. The image display device includes a backlight, an image display panel, a controller, and a viewer position tracking system. The backlight includes a plurality of line sources which are disposed at certain intervals. The image display panel displays a 3D image. The controller controls the backlight and a viewing point image of the image display panel. The viewer position tracking system determines a pupil position of a viewer and transfers position information to the controller. The image display panel provides two or more viewing points. The line sources configure two or more line source sets that are separately driven at the same time. The two or more line source sets are sequentially driven.

Abstract: Systems and methods for compensating for visual distortion caused by surface features on a display are disclosed. For example, one disclosed system includes: a display including one ore more surface features; a processor configured to: receive a display signal including graphical data; determine a location of the surface feature; transform the display signal based at least in part on the location of the surface feature; and cause the transformed display signal to be displayed.

Abstract: Systems, apparatus, and methods are provided for quantifying inter-ocular suppression in binocular vision impairment. The systems, apparatus, and methods may include a stimulus presentation device and a controller which present different stimuli to each eye of a patient. The stimuli can include letters, numbers, or shapes which are arranged in rows, and columns with a stimulus presented to each eye in a location corresponding a stimulus presented to the other eye. The combined contrast of corresponding stimuli equals a predetermined value, and this contrast can be adjusted with each iteration of stimuli presented. This adjustment can be based upon the patient's reports of what is seen and adjustments made by an algorithm executed by the controller. Suppression can thus be determined in terms of visual field location and quantified.

Abstract: A method, system, and computer readable medium which automatically determine the side, field and a level of image quality of fundus images of the retina of a human eye is disclosed. The disclosure combines image processing, computer vision and pattern recognition techniques in a unique way to provide a robust process to identify and grade the quality of fundus images with application to improve efficiency and reduce errors in clinical or diagnostic retinal imaging workflows.

Abstract: A lens barrel includes: a base frame having a first through-hole; an adhesion plate having a second through-hole; a lens frame disposed within the base frame; and an adhesively fixing portion fixing the lens frame to the base frame, wherein the adhesion plate is disposed in a vicinity of the first through-hole and movably held by the base frame, the lens frame includes a projection projecting radially relative to an optical axis of the lens barrel, the projection being engaged with the second through-hole and inserted in the first through-hole, the projection is movable within the first through-hole so as to change a position of the lens frame relative to the base frame, and the adhesively fixing portion is disposed in the first through-hole.

Abstract: An electronic device may include a display and control circuitry that operates the display. The control circuitry may be configured to daltonize input images to produce daltonized output images that allow a user with color vision deficiency to see a range of detail that the user would otherwise miss. The daltonization algorithm may be specific to the type and severity of color vision deficiency that the user has. The control circuitry may conduct a color vision assessment using the display. The color vision assessment may include a sequence of test images that are each displayed for a predetermined period of time before moving to the next test image in the sequence. Each test image may include a color patch on a neutral background. A predetermined number of severity levels for each type of color vision deficiency may be tested during the color vision assessment.

Abstract: Disclosed are computer implemented methods for testing astigmatism which display differently colored bars against a contrasting background. In one implementation, parallel colored bars are separated and joined through various angles of rotation against a constant background. In another implementation one set of bars is formed by variable grating pattern which is rotated within an annulus of solid color bars, desirably against a contrasting intermediate background and a reference background having a linear grating pattern.

Abstract: Systems and methods for improving the peripheral vision of a subject are disclosed. In one aspect, embodiments of the present disclosure includes a method, which may be embodied on a system, for improving peripheral vision of a subject using a visual marker on a display screen, the method includes, displaying a peripheral target on the display screen, the peripheral target having a visually discernable characteristic and determining whether the subject is able to correctly identify the peripheral target displayed on the display screen using the peripheral vision. The visual marker is intended for viewing using central vision of the subject and the peripheral target is intended for identification using the peripheral vision of the subject.

Abstract: Systems and methods for improving the peripheral vision of a subject are disclosed. In one aspect, embodiments of the present disclosure includes a method, which may be embodied on a system, for improving peripheral vision of a subject using a visual marker on a display screen, the method includes, displaying a peripheral target on the display screen, the peripheral target having a visually discernible characteristic and determining whether the subject is able to correctly identify the peripheral target displayed on the display screen using the peripheral vision. The visual marker is intended for viewing using central vision of the subject and the peripheral target is intended for identification using the peripheral vision of the subject.

Abstract: A lens includes a material spanning an area and providing an inside reflective three-dimensional (3D) surface. The reflective 3D surface is defined by a plurality of reflective optical elements including a first reflective optical element and at least a second reflective optical element that each include a sub-element set including a center sub-element (CS) and a plurality of neighboring sub-elements. The plurality of reflective optical elements each have their own non-overlapping optical center axis; and a cylindrically bent spherical surface. The cylindrically bent spherical surface is defined by the neighboring sub-elements in each reflective optical element being located at different 3D points so that the reflective optical elements relative to at least one neighboring reflective optical element provides different values of spherical curvature and different values of cylindrical axis orientation.

Abstract: A refraction device determines a refraction end point to provide corrective optics for a test subject. The device includes an adjustable optical system providing corrective optics to the test subject and an adjustable viewing target disposed along an optical path such as to be viewable through the adjustable optical system by a test subject. The adjustable viewing target includes a directional indicator linked synchronously to at least two choices of corrective optics presented to the test subject.

Abstract: A subjective optomater that is capable of measuring accommodation ability of an eye while reducing the influence of accommodative convergence is provided. A subjective optometer includes: a visual target that is presented to an eye through a measuring optical axis; a measuring optical system that includes a spherical lens capable of changing spherical power on the measuring optical axis; a spherical power changer that changes the spherical power of the spherical lens; and an optical axis deflector that deflects the measuring optical axis so as to align the measuring optical axis with a visual axis of the eye, wherein accommodation ability is measured based on the spherical power of the spherical lens in a state in which the measuring optical axis is deflected by the optical axis deflector.

Abstract: The present disclosure relates generally to a system and method for determining the refractive error of a patient, more particularly determining the patient's refractive error by using a computerized screen, and providing the patient with a prescription for the patient's preferred type of corrective lenses. The system and method do not require the trip or expense of a doctor visit, and are optimized for convenience and cost effectiveness. In a general embodiment, the present disclosure provides a method for determining a corrective lenses prescription of a patient. The method includes, separately, for each eye of the patient, determining the astigmatism prescription of the patient via a computerized screen, and determining the power of the corrective lenses prescription of the patient via the computerized screen.

Abstract: Systems and methods for improving the peripheral vision of a subject are disclosed. In one aspect, embodiments of the present disclosure includes a method, which may be embodied on a system, for improving peripheral vision of a subject using a visual marker on a display screen, the method includes, displaying a peripheral target on the display screen, the peripheral target having a visually discernable characteristic and determining whether the subject is able to correctly identify the peripheral target displayed on the display screen using the peripheral vision. The visual marker is intended for viewing using central vision of the subject and the peripheral target is intended for identification using the peripheral vision of the subject.

Abstract: A measurement apparatus for measuring aberration based on return light of measuring light radiated to an object, includes a light source configured to emit the measuring light, a focusing unit configured to focus the measuring light on the object, an acquisition unit configured to acquire, from a storage unit, information indicating a state of the focusing unit corresponding to identification information of a specific object, and a control unit configured to control the focusing unit based on the acquired information indicating the state of the focusing unit.

Abstract: User interfaces facilitate user interaction with virtual representations of anatomical structures that are displayed on computing systems. The user interfaces demonstrably reflect relative impacts on the anatomical structures based on corresponding conditions and treatments.

Abstract: The present invention relates to an apparatus and method for the assessment and rehabilitation of vision impairment. In particular, the invention is concerned with an apparatus displaying visual stimuli and the method of using this device for the purpose of assessment and rehabilitation of individuals with acquired brain injury and visual impairment resulting therefrom. The apparatus comprises a display means with a plurality of visual stimuli switched on and off in predetermined sequences. The sequences are adapted to be used to assess and rehabilitate a person's visual impairment.

Abstract: Systems and methods are provided for predicting the results of a therapeutic intervention to an eye. An imaging system is configured to provide image data representing at least a portion of the eye of the patient. An input device is configured to permit a user to design a proposed therapeutic intervention for the eye of the patient. A finite element modeling component is configured to generate a finite element model representing the condition of the eye of the patient after the proposed therapeutic intervention according to the image data, the proposed therapeutic intervention, and at least one biomechanical property of tissue comprising the eye. The generated model is constructed as to have no a priori restraints on the motion of the corneal limbus. A display is configured to display the generated model to the user.

Abstract: This invention relates to a flicker threshold measurement device including: an arithmetic processing unit 1; a display unit 8 with a fixed refresh rate; and an operation unit 9, wherein: the arithmetic processing unit 1 displays an image on the display unit 8 in an ON/OFF manner; the arithmetic processing unit 1 changes the display timing by monotonously increasing or decreasing the number of OFF periods per second; the arithmetic processing unit 1 monotonously increases or decreases at least one of: the number of OFF pixels in the image, the size of the image, and the contrast of the OFF pixels, during a period in which the display timing is not changed; each of the OFF periods is a reciprocal of the refresh rate; and the arithmetic processing unit 1 determines the number of OFF periods when a test subject 10 operates the operation unit 9 as he/she starts or stops perceiving flicker, as information corresponding to a flicker threshold.

Abstract: There is provided a subjective eye refracting power measurement apparatus which measures a refracting power of a subject eye. The apparatus includes a projection optical system which projects a visual target light flux toward the subject eye to form a visual target on a fundus of the subject eye; a correction optical system which changes a refracting power thereof; a relay optical system which relays a light flux passing through the correction optical system and to form an image of the correction optical system in front of the subject eye; a deviation detector which detects a positional deviation of the image of the correction optical system with respect to the subject eye; and a correction unit which optically corrects a formation position of the image based on a detection result by the deviation detector such that the image is formed in front of the subject eye.

Abstract: A vision testing method and apparatus are disclosed, the method including measuring the modulation to a wavefront of light that is imparted by an intra-ocular lens, determining the wavefront modulation necessary to emulate the optical properties of the IOL after it replaces the crystalline lens in a patient's eye, generating a static or dynamic image viewable by a patient, modulating the wavefront of the image remote from the patient to attain the wavefront that necessary to emulate the optical properties of the IOL after it is implanted, and relaying said wavefront to a plane nearby, on, or within the patient's eye.

Abstract: A static visual field scanning apparatus including: visual field scanning screen generating means; fixation image displaying and controlling means; scan line setting means; scanning point setting means; visual target displaying and controlling means; the first detection means; the second detection means; visual field mapping screen generating means; immediate post first detection scan continuation means; immediate post second detection scan continuation means; response waiting means; visual target display coordinates storing means; visual target perception inability symbol mapping means; the first completion judgement means; the second completion judgement means; post first completion judgement the next scanning point calculation means; and post second completion judgement the next scanning point calculation means.

Abstract: An optometry apparatus includes; a housing accommodating a concave mirror disposed on a reference axis; and a display disposed outside the housing and out of the reference axis for projecting a target light flux onto the concave mirror. The concave mirror is configured to reflect the target light flux output from the display toward an examinee's eye along the reference axis.

Abstract: In exemplary implementations of this invention, cataracts in the human eye are assessed and mapped by measuring the perceptual impact of forward scattering on the foveal region. The same method can be used to measure scattering/blocking media inside lenses of a camera. Close-range anisotropic displays create collimated beams of light to scan through sub-apertures, scattering light as it strikes a cataract. User feedback is accepted and analyzed, to generate maps for opacity, attenuation, contrast and sub-aperture point-spread functions (PSFs). Optionally, the PSF data is used to reconstruct the individual's cataract-affected view.

Abstract: The invention relates to a method for characterizing a perception of blur by a subject (10) in order to determine a dioptric blur value for an image (C) observed by the subject. The image has a blur generated by the low-pass filtering of the image components in accordance with the respective space frequencies of said image components. An indication of the perception thereof of blur in the image is provided by the subject and is associated with the dioptric blur value. Several images associated with different dioptric blur values are used for defining a dioptric blur threshold value for the subject that corresponds to a blur perception criterion. The invention can be used for adjusting the design of a progressive lens for the subject in accordance with the sensitivity to said visual blur of said object.

Abstract: Systems and methods for improving the reliability of visual field test results are presented. In one embodiment, images of the eye are recorded during the presentation of visual stimuli and are displayed to the user to provide information on eye motion, eye position relative to trial lens, and eyelid closure during the test. Individual or combined images can be displayed for individual stimuli, specific test points, or points in the gaze trace in various embodiments of the invention.

Abstract: The aim of the present invention is to provide a projector device and a medical device with said projector device, said devices facilitating an improved projection of a two-dimensional pattern onto a plane in an optical body, in particular in an eye.

Abstract: A gaze target determination device includes an event setting unit that generates, for each object at different times, a display event which triggers a movement of the gaze direction of the user who is gazing at the object and which indicates a movement or a change of the object; and a gaze trajectory calculation unit that calculates a gaze trajectory based on the detected user's gaze direction. An eye movement event detection unit detects an event detection time which is a time at which the gaze direction moves according to the display event, based on the calculated gaze trajectory. A synchronization structure analysis unit calculates, for each object, time difference between the event detection time and event occurrence time; and a gaze target determination unit determines the object at which the user is gazing from among the objects, based on the calculated time difference.

Abstract: A visual function testing device includes: a visual target image presentation unit that presents a visual target image; a visual target image rendering unit that renders the visual target image to be presented on the visual target image presentation unit; a visual function test item selection unit that selects a visual function test item; a visual target image generation unit that generates a visual target image corresponding to the test item selected by the visual function test item selection unit; a viewpoint distance input unit that inputs a distance between the visual target image presentation unit and a viewpoint of an observer; and a visual angle input unit that inputs an angle to be made by the visual target image and the viewpoint of the observer. Based on the viewpoint distance and the visual angle, a display size and display position of a visual target image are calculated.

Abstract: Provided herein are devices, systems and methods for evaluating the eye. For example, the devices, systems and methods are optionally used for evaluating the visual potential of an eye.

Abstract: An eyesight testing apparatus includes an imaging device for virtual imaging a test object located within a focal length of the imaging device and imaged at different distances into eyes of a subject located in a focal point of the imaging device, an optical deflection device arranged in a beam path between the imaging device and the test object to deflect the beam path by 180°, wherein the deflection device is displaceable in the direction of the beam path and the test object is not, a monitor device that generates the test object and that comprises a single monitor, optical components lying in the beam path sized so that both eyes are able to take part in a test, and so a partial beam path is formed for each eye, and a blocking device arranged in the beam path, which comprises two LCD blocking elements for the partial beam paths.

Abstract: According to a first aspect of the present invention, there is provided a method of measuring a property of an eye of a subject using an apparatus which is: arranged to provide a bleaching light, a background light ostensibly invisible to rods (e.g. substantially red, and/or having or being a wavelength greater than 580 nm) and a target light ostensibly visible to rods (e.g. substantially green, and/or having or being a wavelength less than 580 nm and greater than 400 nm, e.g.