53 results about "Visual field testing" patented technology

An adjustable and foldable device for visual field testing or treatment includes a computer display mounted on a base and presents visual stimuli to the patient. An associated head support assembly with a chinrest supports and positions the head of the subject with respect to the display. An articulated arm joins the base and the head support assembly. The arm will resist a given downward force supplied by the head, and is foldable toward the display to create a more compact and portable device. Additional articulations may allow the head support assembly to fold upon arm, and the arm to fold upon the base. The device may include a locking mechanism that secures the device in a folded or unfolded configuration.

A method is provided for stimulating a motion-detecting visual pathway of a subject. A subject is tasked with fixating on a central stimulus displayed on a computer-driven display. While the subject is visually fixated, a peripheral stimulus is presented on the display. At least one characteristic of the peripheral stimulus is altered so as to trigger the motion-sensitive visual pathway of the subject. The altered characteristic may be the spatial locus, size, pattern, luminosity or hue of the stimulus. The altered and base stimulus may be alternately displayed in a cyclical manner to sustain the display of a dynamic peripheral stimulus. While alternately displaying the base and altered stimulus, the subject's response, indicative of their detection of the stimulus, may be monitored and recorded. The dynamic peripheral stimulus may be, for example, a repetitively translating object, or a repetitively blinking object.

Alteration of a fixation or peripheral stimulus displayed on a computer-driven display allows a human subject to maintain extended visual fixation upon the resulting dynamic stimulus. The fixation is presented upon the display and the stimulus is altered to allow resensitization of the subject's retina, thereby allowing prolonged visual fixation upon the resulting dynamic target. A dynamic stimulus may utilize a frequency doubling illusion.

An adjustable and foldable device for visual field testing or treatment includes a computer display mounted on a base and presents visual stimuli to the patient. An associated head support assembly with a chinrest supports and positions the head of the subject with respect to the display. An articulated arm joins the base and the head support assembly. The arm will resist a given downward force supplied by the head, and is foldable toward the display to create a more compact and portable device. Additional articulations may allow the head support assembly to fold upon arm, and the arm to fold upon the base. The device may include a locking mechanism that secures the device in a folded or unfolded configuration.

The present invention relates to a system, device and a method for objective visual field testing and in particular, to such a system and method in which provides objective chromatic perimetry test or color vision test using a pupillometer.

Systems and methods for providing variable refractive correction in a visual field testing device are presented. One embodiment of the variable refractive correction involves two or more aligned transmissive plates arranged to produce changes in refractive power by translation or rotation of the plates relative to each other. Several alternative designs for providing variable refractive correction are described. The refractive correction can be set manually or automatically based on knowledge of the refractive error of a specific patient and spherical and cylindrical refractive correction are possible. Additional lens systems can be used to extend the range of refractive correction to accommodate a larger patient population.

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.

A visual field testing apparatus for scanning the visual field of a human eye in great detail, precision, and clarity so as to detect the smallest blind area whereby allowing users the ability of early detection of glaucoma and other eye diseases of visual loss. The apparatus is small and inexpensive so that anyone can afford to purchase it and self-test without assistance so that the user can test frequently at home which further leads to early detection of eye diseases. Because of its great precision and detail in test results, the present invention is especially useful to doctors and researchers. One embodiment of the present invention is a visual field tester which comprises: (a) a recording surface having eye fixation means to fixate an eye's visual field relative to said recording surface; and (b) a handheld scanning device which has a test mark for detecting very small blind areas in said eye's visual field and marking means for mapping said detected very small blind areas onto said recording surface.

A method and apparatus for electronically performing a visual field test for a patient. A visual field test pattern is displayed to the patient on an electronic display device and the patient's responses to the visual field test pattern are recorded. A visual field representation is generated from the patient's responses. The visual field representation is then used as an input into a variety of automated diagnostic processes. In one process, the visual field representation is used to generate a statistical description of the rapidity of change of a patient's visual field at the boundary of a visual field defect. In another process, the area of a visual field defect is calculated using the visual field representation. In another process, the visual field representation is used to generate a statistical description of the volume of a patient's visual field defect.

A virtual reality system can perform a visual field test for detecting an ocular disorder. The system can include a display unit and a virtual reality headset. The virtual reality headset can be in wireless communication with the display unit. The virtual reality headset can include a display screen configured to present a test scene to a patient to thereby detect the ocular disorder.

Methods and systems for assessing a visual field of a person are provided. Information can be presented to a person undergoing a visual field testing in a manner that utilizes the person's natural tendency to look at an object that is displayed so that it attracts the person's attention. A fixation target can be displayed on a display viewed by a user. Once it is determined that the user has viewed the fixation target and the person's eye(s) location is determined, a test target is displayed on the display in a location corresponding to a location on the user's visual field. The test target isdetermined to be either detected or missed based on user input acquired as the user is viewing the display.

A visual field testing apparatus for scanning the visual field of a human eye in great detail, precision, and clarity so as to detect the smallest blind area whereby allowing users the ability of early detection of glaucoma and other eye diseases of visual loss. The apparatus is small and inexpensive so that anyone can afford to purchase it and self-test without assistance so that the user can test frequently at home which further leads to early detection of eye diseases. Because of its great precision and detail in test results, the present invention is especially useful to doctors and researchers. One embodiment of the present invention is a visual field tester which comprises: (a) a recording surface having eye fixation means to fixate an eye's visual field relative to said recording surface; (b) a handheld scanning device which has a test mark for detecting very small blind areas in said eye's visual field and marking means for mapping said detected very small blind areas onto said recording surface; and (c) a head support for supporting a user's head.

The invention belongs to the commercial vehicle performance test field and especially relates to a suspended commercial-vehicle integrated visual field testing device. The device is attached to a vehicle window glass fixing device through a powerful suction disc. A suspension rod, a universal adjustment structure and the like are adjusted to determine that a position of a laser emitter is superposed with an eyespot position of a driver. A laser irradiator uniformly sweeps the dots along an edge of a visible area in front of a cab and the edge of sight glass, and tested ground light spots forma track curve according to an irradiation sequence. Each curve combination divides surrounding areas of a vehicle to form a visible area and a visual field blind area according to a visual field category, and a vehicle comprehensive visual field performance map is obtained after correction. In the invention, installation and dismounting are convenient, a high model matching degree is possessed, and the device is suitable for visual field measurement of various commercial vehicles. A commercial-vehicle integrated visual field measuring function is realized. In addition to a front visual field,visual-field visual range measurement of a front-view mirror, a main rear view mirror, a wide-angle external view mirror, a blind compensation mirror and other indirect visual field devices is added.

The present invention relates to a system, device and a method for objective visual field testing and in particular, to such a system and method in which provides objective chromatic perimetry test or color vision test using a pupillometer.

The present invention relates to a system, device and a method for objective visual field testing and in particular, to such a system and method in which provides objective chromatic perimetry test or color vision test using a pupillometer.

The invention concerns a device designed for eyesight examination, which can be applied in medicine, in particular in ophthalmology The device can be used for perimetry / visual field testing and also other parameters where tests are conducted by means of light stimuli displayed in front of the patient's eyes.

A method is disclosed for improving accuracy of visual field testing in head-mounted displays. The method includes retrieving a visual field testing pattern for a head-mounted display, the visual field testing pattern including stimuli displayed at respective locations in a visual field of the head-mounted display. The visual field testing pattern is generated on the head-mounted display. Data is retrieved from a tilt sensor, located at the head-mounted display, for detecting degrees of head tilt of a user wearing the head-mounted display and the degree of head tilt is determined. A comparison is made between the degree of head tilt of the user to a first threshold degree. In response to the degree of head tilt of the user meeting or exceeding the first threshold degree, a recommendation to the user is generated for display on the head-mounted display.

The embodiment of the invention discloses a display content adjustment method and device, computer equipment and a storage medium. The method includes displaying view test content; acquiring a region of interest of a user for the visual field test content; obtaining a projection area of the visual field of the user on a display screen where the display content is located according to the attention area; in the projection area, selecting a corresponding target visible area according to the type of the display content; and adjusting the display content based on the target visual area, so that a relatively proper display range is set for the user with the visual field disorder, and the universality of the display is improved.

A binocular visual field (VF) testing system and a method employing spherical (non-Euclidean) geometric modeling and eye-tracking technology to generate cyclopean visual field maps are disclosed. The system projects dichoptic stimuli to each eye independently at controlled fixation distances and dynamically records vergence responses using eye tracking. A non-Euclidean spatial encoding model based on logarithmic spirals and Jacobian analysis is applied to the resulting binocular data, enabling three-dimensional topographic field mapping. This approach extends traditional monocular field testing by accounting for retinal curvature, binocular integration, and fixation depth effects, resulting in volumetric visual field models more representative of real-world spatial perception. The system includes hardware (BINOSCOPE) and software modules that implement real-time depth encoding, topological mapping, and boundary detection of peripheral visual fields.

A method for performing a visual field test that includes presenting, through a set of light emitters within a visual field test area, a first sequence of light stimuli; receiving, responsive to each light stimulus, a user response; and generating a sensitivity map of a visual field of a user as output of a machine learning (ML) model responsive to the user responses as input. The method includes determining that a subset of emitters are to present a second sequence of light stimuli based on the first predicted sensitivity map; presenting, through the subset of emitters, the second sequence of light stimuli; receiving, responsive to each light stimulus, the user response; and generating a second sensitivity map (e.g., by updating the first sensitivity map) as output of the ML model responsive to the user responses to the first and second sequence of light stimuli as input into the ML model.

The present invention discloses a method, device, system, and computer-readable storage medium for testing helmet visual field. The method includes the following steps: S1, placing a tester's head at a preset position inside a helmet, and constructing a three-dimensional coordinate system with the tester's eyebrow center as the origin, wherein the X direction represents the front-to-back direction, the Y direction represents the left-to-right direction, and the Z direction represents the up-down direction; S2, setting the eyebrow center as a first test point, and setting multiple second test points at preset positions outside the helmet. When testing the upper and lower visual fields and the horizontal visual field, the corresponding second test point is moved from back to front. When the second test point enters the tester's line of sight, the spatial position of the second test point and the corresponding first test point in the three-dimensional coordinate system is recorded and connected; S3, calculating the upper and lower visual field values ​​and the horizontal visual field values ​​respectively using the connection line in step S2 and the angles between the XZ plane and the XY plane in the three-dimensional coordinate system. The helmet visual field testing method according to the present invention has the advantage of more accurate test results.

A method and a device for visual field testing are provided. The method is applied to a piece of display equipment which includes a display for presenting a detection interface. Within a preset first duration, a central stimulus point is displayed on the detection interface. Within a preset second duration, a central target and a peripheral target are displayed on the detection interface based on a preset target display strategy. In response to a subject's first trigger operation on the detection interface, a first response result corresponding to the first trigger operation and a target position area of a next round of display of the peripheral target are determined. Further, a testing result of the subject is determined based on the first response results corresponding to a preset number of detections.

Methods and systems for identifying a patient at increased risk for development of a retinal condition employ visual field tests. A method of identifying a patient at increased risk for development of a retinal condition includes monitoring the patient via one or more visual field tests. Each of the visual field tests includes displaying stimuli for viewing by an eye of the patient and receiving indications of locations of the stimuli as perceived by the patient. A visual field test score for each of the visual field tests is determined based on the stimuli and the indications of locations of the stimuli as perceived by the patient. In response to at least one of the visual field test scores exceeding a screening threshold, the patient is identified as being at increased risk for development of the retinal condition.

The invention relates to the technical field of direct field of view testing, in particular to a marker device for direct field of view testing. Comprising a base, universal wheels arranged at the lower end of the base, an electric lifting rod arranged at the upper end of the base, an objective table arranged at the upper end of the electric lifting rod, a clamping groove formed in the objective table, an RFID reader-writer and an optical sensor which are embedded in the clamping groove, a marker arranged on the objective table, a plug arranged at the lower end of the marker, and an RFID chip arranged on the plug. The overhanging frame is arranged at the front end of the objective table; the positioning module is arranged on the overhanging frame; the plug is matched with the clamping groove, the RFID chip corresponds to the RFID reader-writer, the telescopic end of the electric lifting rod is vertically upward and fixed to the lower end of the objective table, the objective table has the lifting freedom degree through the electric lifting rod, one end of the overhanging frame is fixed to the objective table, and the other end of the overhanging frame horizontally overhangs forwards. The positioning module is fixed to the overhanging end of the overhanging frame. According to the invention, various reference targets in a vehicle view can be simulated, all test heights and angles required in a standard test are fully covered, and the use flexibility and the operation convenience are greatly improved.

The present system is intended to enable self-service field-of-view testing at home using common computing devices and without the participation of experts. The system can adapt to the differences of different technical platforms, and according to various described embodiments, the accuracy and reliability of detection are ensured by calibrating the screen size and brightness, monitoring the real-time viewing distance, adjusting the display curvature, and using a front-facing camera to identify the staring stability and detect the eye shielding condition.

A visual field-testing system is provided. The visual field-testing system include a method utilizing a virtual reality output device operatively associated with a central fixation standard / static automated perimetry visual field test. The virtual reality output device is embodied in goggles providing stationary high design technology enabling a fixed axial length from the lens of each eye being tested, producing highly accurate and repeatable testing results.

The utility model belongs to the technical field of vehicle testing, and particularly relates to a vehicle indirect visual field testing device, which comprises a user terminal, a vehicle-mounted visual field testing device, a three-dimensional 'H' point device, a wireless communication module and a mounting bracket, and is characterized in that the user terminal is used for receiving and displaying test image data of the vehicle-mounted visual field testing device; the three-dimensional 'H' point device is installed on a vehicle driver seat, the vehicle-mounted visual field testing device is connected with the three-dimensional 'H' point device through the installation support, and the vehicle-mounted visual field testing device rotates on the three-dimensional 'H' point device up, down, left and right under the action of the installation support; the vehicle-mounted visual field testing device comprises a camera, a light source module and a laser module, the camera and the light source module are located at eye points of the three-dimensional H-point device, and the laser module is installed on the peripheral side of the camera. According to the utility model, a problem of inconvenient operation in a vehicle indirect visual field test process in the prior art can be solved.

A virtual eye test can be performed for visual field testing using a dynamic grid of light points in a virtual reality (VR) environment. The test can be conducted using an electronic device with a head-mounted display (HMD) and a camera. The device can generate and render a VR user interface in a three-dimensional virtual environment, simulating test scenarios with a dynamic grid of light points. The device can continuously track eye movements in response to one or more visual stimuli and analyze the detection and identification of light points to assess visual detection across the visual field.