84 results about "Vision test" patented technology

A method and apparatus for generating a visual field pattern which serves as a subjective test protocol to evaluate central vision using dynamic image generation to prevent the brain from filling-in to provide better results of patient feedback and reporting of locations of visual disturbance. This enables effective central vision testing to detect the presence of visual field disruptions including scotoma, visual-neurological perceptual effects such as filling-in, and Troxler fading. The present method and apparatus can be used for vision monitoring and self-assessment, and more particularly for monitoring vision for damage or disease to the macula or retina.

The present invention relates to a multi-luminance visual navigation test field for performing a vision test on a test subject. The multi-luminance visual navigation test field comprises: a test map, which can be operated to form a plurality of test scenes, each of which is provided with a preset walking route; a plurality of static obstacles, which are arranged on the test map and are used to form obstacles on the test map to hinder the test subject's progress; and a light source assembly, which is used to provide a plurality of light intensities. The multi-luminance visual navigation test field solves the problem in the prior art that the route design of the MLMT scheme is a full white background and arrows are used to indicate the direction of travel, but since most RP patients have extremely low vision and show decreased panretinal light sensitivity mainly due to rod cell damage, the problem that patients have difficulty distinguishing route markings and thus have difficulty in detection is solved. The multi-luminance visual navigation test field has a wide range of applications, low cost and higher detection accuracy.

A user's visual disorders can be treated via a virtual reality (VR) system, which can include a VR headset in electronic communication with a computing device. The computing device causes vision tests to be displayed on the VR headset. Using varying combinations of eye-tracking sensors, eye-tracking cameras, motion-tracking sensors, handheld devices, and microphones, the VR headset can collect data about the user as she completes the vision tests. Using the data collected by the VR headset, the computing device can evaluate the user for various visual disorders and develop a personalized vision therapy plan for the user. Optionally, advanced algorithms in the computing device dynamically alter the vision therapy plan based on the user's performance and the progression of her visual disorders.

The application discloses an abnormal refraction state recognition method and device based on an eye abnormal posture, and the method comprises the following steps: acquiring video data corresponding to a vision test process of a subject, wherein the vision test process is a vision test performed by the subject based on a target change video played by a preset target change device; performing image frame processing on the video data, determining a face region in each frame of image, and performing face feature point extraction on the face region to determine eye socket feature points and eyebrow feature points in the face feature points; recognizing an eye abnormal posture based on the eye socket feature points and the eyebrow feature points, and determining an image frame corresponding to the eye abnormal posture, so as to determine vision test data according to the image frame, wherein the vision test data comprises the shape of a target, the distance between the subject and the target, and the blurring degree of the target. The application can accurately judge whether the subject has an abnormal refraction state by extracting the eye abnormal posture.

The utility model provides a test lens for amblyopia correction, which comprises a carrier provided with a plurality of light-transmitting parts arranged at intervals; the additional part is arranged on the light-transmitting part and is used for blurring the light-transmitting part so as to depress the dominant eye vision of the patient; additional pieces with different suppression degrees are correspondingly arranged on the different light-transmitting parts, and the suppression degrees of the additional pieces are gradually increased in the arrangement direction of the light-transmitting parts. According to the utility model, the plurality of additional parts with different depression degrees are arranged on the carrier, so that the requirements of different patients on vision conditions can be met, the vision test of the patients is facilitated, and meanwhile, the plurality of additional parts with different depression degrees are integrated on one carrier, so that the structure integration is realized, the operation of a user is facilitated, and the test efficiency is improved.

There is provided a method for determining type of cataract by an electronic device. The method includes performing vision focus calibration for a user, determining central and peripheral regions of interest on a display of the electronic device based on fixated vision, performing a primary test for obtaining scores for the central and peripheral regions of interest, selecting at least one vision test mode based on the obtained score, and adapting at least one visual display parameter based on the obtained score and the selected at least one vision test mode. The method also includes determining a type of cataract from the selected at least one vision test mode, determining severity of the determined type of cataract, and providing the determined type of cataract and the determined severity with one or more recommendations to the user.

The invention relates to the technical field of self-service optometry, and discloses an intelligent voice-guided self-service optometry operation system. A voice input acquisition module of the system obtains a user voice instruction, preprocesses the user voice instruction and outputs digital voice data; the optometry data real-time acquisition module synchronously captures eye physiological parameters and a vision test response sequence to generate an actually measured optometry data set; the dynamic optometry model construction module is used for outputting a vision state prediction value based on a historical optometry data warehouse training model; a multi-dimensional difference analysis module calculates a multi-dimensional deviation between a predicted value and an actually measured optometry data set, and generates an optometry difference index matrix; the visual problem positioning module executes spatial distribution mapping according to the matrix and outputs a thermodynamic diagram of a visual anomaly region; the adaptive voice guidance module generates a customized voice guidance instruction sequence based on the thermodynamic diagram. According to the system, optometry interaction convenience and data processing scientificity are improved, visual abnormity is accurately positioned, personalized guidance is provided, and self-service optometry experience and result accuracy are improved.

A virtual vision test can be performed to evaluate response time in detecting subtle visual changes under varying light conditions 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 photorealistic virtual environment, simulating dynamic lighting scenarios. The device can continuously track eye movements in response to visual stimuli presented in these scenarios. The system can then evaluate the detection of subtle visual changes based on the tracked eye movements, and provide a comprehensive assessment of visual acuity and responsiveness under different lighting conditions.

A vision test can be performed based on real-time audio instructions in a virtual environment. An electronic device, such as a head-mounted display, can execute a visual assessment application, including generating a user interface corresponding to a three-dimensional virtual environment. The electronic device can display a plurality of visual stimuli in the user interface, and each visual stimulus can be displayed in duplication with respect to a respective target depth. The electronic device can receive one or more user responses, and each user response can indicate whether a user perceives a corresponding visual stimulus in duplication at the respective target depth. Based on the one or more user responses, the electronic device can determine a depth perception profile of the user, and the depth perception profile can include a plurality of depth perception levels corresponding to a plurality of target depths.

To perform a visual acuity test with high accuracy so as to be easily understood even by a child or the like.SOLUTION: A visual acuity examination display tool 20 includes a display tool body 21 and a visual acuity examination mark 100 displayed on the display tool body 21, and the visual acuity examination mark 100 includes a mark part 101 which can be recognized by an examination object person including a child, and a notch part 105 which is formed in a part of the mark part 101 and indicates a minimum separation threshold.SELECTED DRAWING: Figure 1

A vision screening device for administering vision screening tests to a patient, and in particular vision screening test(s) to determine the presence of diseases and / or abnormalities in the eye(s) of the patient, is described herein. The vision screening device includes emitters for emitting near-infrared light and white light from a patient-facing side and includes a sensor to receive reflected light and energy for performing vision screening tests. The received reflected energy comes into ana emission surface and is reflected by a beam splitter to a sensor. The vision screening device includes a first display for displaying digital objects for a vision test and a second display for a clinician to interact. The vision screening device further includes a sensor to aid in proper positioning of a patient during screening.

The embodiments of the present disclosure provide a method for visual acuity test, a head-mounted display device, and a computer-readable medium. In one specific embodiment, the method comprises: executing a visual acuity test operation in response to that a head-mounted display device corresponds to a target diopter; providing a diopter adjustment prompt according to a first visual acuity test result; triggering the execution of an eye dynamic training operation in response to completion of the diopter adjustment; providing a diopter adjustment prompt according to the target diopter in response to the completion of the execution; executing a visual acuity test operation in response to that the head-mounted display device corresponding to the target diopter; and displaying the first visual acuity test result, a second visual acuity test result, and a dynamic training accuracy rate. The embodiment relieves the visual acuity reduction caused by blurry visions during the visual acuity training, and can thus acquire the real training effect of a user via the visual acuity training. In addition, when the eye dynamic training operation comprises interactive dynamic training and playing visual fatigue relieving videos, the eye-brain cooperation can be promoted, thus generally improving the visual fatigue relieving effect.

The invention discloses a fine exercise training method and system under visual guidance for improving a visual function, and relates to the technical field of visual function improvement or recovery, and the method comprises the steps: determining a minimum threshold value according to a visual test index page, and generating a training scheme of a current training period based on a visual function impaired eye visual minimum recognition threshold value; when the training scheme is executed, to-be-copied characters with the character size being the real-time training character size are called from a paper copybook or a to-be-copied electronic character library to generate a current day copybook; the trainee is in a standard sitting posture, has a preset distance from the desktop and shields the eye-care copybook to copy the current day copybook; performing visual function testing after the training scheme is executed, and adjusting the training scheme of the next training period based on the evaluation training effect. The trainee can quickly improve the vision of the patient with the impaired optic nervous system function in a short time through fine movement under visual guidance, the compliance of the patient is improved, and the system has the advantages of being low in cost, high in feasibility and capable of being extended at home.

A virtual eye test can be conducted to evaluate night vision and glare sensitivity in a virtual reality (VR) environment. The test can be conducted using an electronic device that includes a head-mounted display (HMD) and a camera. The electronic device can generate a VR user interface corresponding to a photorealistic virtual environment and render the VR user interface on the HMD. The electronic device can simulate one or more dynamic lighting scenarios and while simulating these scenarios, in real time, continuously track eye movements and response times to visual stimuli using the camera. The device can then evaluate user response based on the eye movements and response times for testing night vision and glare sensitivity.

A vision test can be implemented in a virtual environment using an electronic device, such as a head-mounted display. The device can execute a visual assessment application and generate a user interface corresponding to a three-dimensional (3D) virtual environment. A plurality of visual stimuli can be displayed at a first acuity level in the 3D virtual environment and can have a plurality of first shadings. The electronic device can obtain one or more user responses and determine a first contrast perception level corresponding to the first acuity level. The electronic device can also determine a shading range for a second acuity level based on the first contrast perception level. The device can further determine a plurality of second shadings in the shading range. The plurality of visual stimuli can be displayed at a second acuity level in the 3D virtual environment with the plurality of second shadings.

The invention relates to the technical field of vision detection, in particular to an intelligent vision detection method and an intelligent vision test system. The intelligent vision detection method comprises the following steps: dynamically calculating a target visual angle and a size of a sighting target according to a test distance; generating the sighting mark by adopting an equivalent vision method; and displaying the sighting marks on a display device in a consistent manner at the target visual angle. The vision testee can independently complete vision detection under the condition that the vision testee is not limited by spatial distance, and the accuracy of a detection result is improved.

In an embodiment of the disclosure, there is provided a handheld vision tester for vision self-testing by a user. The handheld vision tester comprises a touchscreen display, a control, and an interface port. The touchscreen display is configured to present different shapes, either statically or dynamically, to the user for the vision self-testing. One of the different shapes may be a modulated version of another similar shape displayed at the same time and includes a modulated edge. The control is configured to allow a user to trigger operations of the tester and allow the user to select one of the different shapes. The handheld vision tester is configured to determine results of the vision self-testing from the user selections and store the results in the handheld vision tester. The interface port is configured to transmit the stored results to a healthcare provider who uses the results to enhance treatment routines.

A virtual reality (VR) system can be implemented for vision testing and eye health monitoring. The system utilizes an electronic device equipped with a high-resolution VR headset, eye-tracking sensors, and wearable devices capable of measuring intraocular pressure, tear film stability, and ocular blood flow. The device generates a VR user interface corresponding to a three-dimensional virtual environment and renders it on the VR headset. Within this environment, the system conducts a series of vision tests. Throughout these tests, the system continuously monitors eye movements using the eye-tracking sensors and collects vital data from the wearable devices. This data is then evaluated to assess both visual performance and overall eye health, providing a more holistic view of the user's ocular condition in a controlled virtual setting.

The invention relates to a support device (100) for supporting an optotype (102) for an examination of the near vision of a subject, the support device comprising: - an attachment means (110) intended to receive a near-vision test bar (15) fixed to a refractor head (12), the attachment means comprising a partly open hook (115) extending from a base (112), the hook having an inner surface provided with a bearing portion on which the near-vision test bar is adapted to bear, the bearing portion having a cross section with a broken-line shape formed by a hexagonal portion and a square portion, the hexagonal portion being intersected by the square portion such that the square portion forms a notch in the hexagonal portion; and - a support portion (130) for supporting the optotype mounted on the base of the attachment means.

The present invention relates to a vision testing method and device. The vision testing method comprises the following steps: S1. setting a plurality of movable sight marks for a test subject to test, and presetting a test plan, wherein the test plan includes the number of tests, the number a1 of sight marks used in each test, and the time the sight marks are used each time; S2. When the test subject arrives at the test location, executing the pre-set test plan and obtaining the number a2 of sight marks identified by the test subject in use during each test. By setting a plurality of movable sight marks and pre-setting a test plan, the vision testing method avoids errors caused by fixed content and memory effects in traditional vision tests. The mobility of the sight marks increases the randomness and difficulty of the test, allowing the test results to more truly reflect the test subject's vision level, thereby reducing vision test errors caused by repeated test content and improving the accuracy of the vision test.

A method for a self-guided vision test can include, at a first electronic device in communication with a second electronic device, obtaining data indicative of a position of a target displayed by the second electronic device relative to the first electronic device or a user of the first electronic device while the target moves relative to the first electronic device, tracking, using one or more first image sensors, a direction of gaze of the user, and based on a relationship between the position of the target and the direction of gaze while the target moves relative to the first electronic device or a user of the first electronic device, presenting an indication of abnormal eye movement.

The utility model discloses a physical examination center vision testing auxiliary device which comprises two clamps, the two clamps are fixedly clamped on two glasses legs of glasses respectively, the middle portions of the two clamps are fixedly connected to one ends of corresponding connecting pipes, and the other ends of the connecting pipes are hinged to one side of a shielding plate. The vision testing auxiliary device for the physical examination center comprises two clamps, the two clamps are fixedly clamped on two glasses legs of glasses respectively, the face, provided with the first protective layer, of the shielding plate is made to be tightly attached to lenses, and therefore the first protective layer is arranged on the side, provided with the second protective layer, of the shielding plate. The eyeglasses are provided with the shielding plates, so that the eyes corresponding to the eyeglasses are shielded, blurring of the eyeglasses caused by directly shielding the eyeglasses by hands is avoided, the vision accuracy is improved, when the eyes need to be tested, the shielding plates for shielding the eyes are rotated and opened along the hinge parts, and the eyeglasses are very convenient to use and suitable for old people and children.

The present disclosure provides a vision test optical system for improving eye health and a control method thereof, wherein the vision test optical system comprises: a ring-shaped light beam generating component for generating a ring-shaped light beam; a target light beam generating component for generating a target light beam; a control component for performing operation control processing on the ring-shaped light beam generating component and the target light beam generating component by using a mutual exclusion control strategy; and an optical system for projecting the ring-shaped light beam or the target light beam to the user's eye. Thus, by using the mutual exclusion control on the two light beam generating components, the vision test processing on the user's eye can be performed before and after the intervention on the user's eye. Through the two times of vision test processing, the intervention effect on the user's eye can be known, so that the compliance of the user in the eye intervention process is good, and the photobiomodulation effect is further improved. In addition, the vision test function and the eye intervention function are integrated into the same system, thereby reducing the cost.

A vision test can be performed for assessing eye depth perception in a virtual environment. An electronic device, such as a head-mounted display, can execute a visual assessment application, including generating a user interface corresponding to a three-dimensional virtual environment. The electronic device can identify a first line of sight of a user associated with the electronic device and select a plurality of positions on the first line of sight. For example, each position can be located in a respective position range. For each position, an object can be displayed at a plurality of locations within the respective position range. The electronic device can obtain a plurality of user responses to the displaying of the object for each position and determine a depth perception level of the user associated with the first line of sight based on the plurality of user responses.

A vision test can be performed for evaluating eye depth perception in a virtual environment. An electronic device, such as a head-mounted display, can execute a visual assessment application, including generating a user interface corresponding to a three-dimensional (3D) virtual environment. The electronic device may display a first visual stimulus at a first depth in the user interface, and the first depth can be measured on a first line of sight. The electronic device may display the first visual stimulus at a second depth in the user interface, and the second depth can be distinct from the first depth and measured on the first line of sight. The electronic device may obtain one or more user responses to displaying of the first visual stimulus. Based on the one or more user responses, the electronic device may determine a depth perception level for a user associated with the electronic device.

The utility model provides an observation device, the observation device includes: shell, optical lens, object module, circuit board subassembly, guide rail, be equipped with said optical lens on said shell, said optical lens with object module parallel arrangement, object module with circuit board subassembly electric connection, said guide rail is equipped with said guide rail, said guide rail is equipped with said guide rail, said guide rail is equipped with said guide rail. The real object module is movably arranged on the guide rail, and the optical axis of the optical lens is parallel to the direction of the guide rail; in the using process, a user observes the real object module through the optical lens, carries out vision testing, moves the real object module on the guide rail till the sight line is clear and determines the moving distance of the real object module when the sight line is clear, and the circuit board assembly outputs vision data of the user according to the moving distance. According to the utility model, the problems of large size, long testing time and inconvenience in carrying of the existing testing device can be solved.

Methods, systems, and devices to improve the assessment of visual function and overcoming limitations of current methods to identify the visual function that potentially could be reached by a given eye. Multiple eye tests including visual stimuli plus optical measurement components, and methods to combine the results, identify and quantify sources of decreased vision resulting from optical sources, such as a lens and cornea as distinguished from retinal sources. By identifying potentially correctable optical sources of decreased vision, and overcoming physiological limitations such as size of the eye's pupil, the visual benefits of treatment such as by cataract or corneal surgery are distinguished from retinal pathology that requires medical intervention. The devices and methods provide metrics that include an expected value of the visual function and sources of variability including both optical and neural components, to guide treatment and improve clinical trials.

The utility model discloses a portable auxiliary detection device for an automobile indirect visual field test, which comprises a plastic shell, a sliding assembly and a detection assembly are arranged in the plastic shell, the detection assembly is connected with the sliding assembly, the plastic shell is provided with two telescopic rods and an adjustable assembly in the second direction, and the adjustable assembly is connected with the sliding assembly. The adjustable assembly is connected with the two telescopic rods; according to the utility model, the structure is simple, the design is reasonable, the plastic shell is light in weight, the edge is smooth and chamfered, the rear part of the plastic shell is provided with a sliding cover structure, the maintenance and the carrying are convenient, and the potential safety hazard problem is reduced; the distance in the second direction can be adjusted, rotation in the first direction can be carried out, the working angle of the adjustable assembly is changed, the structure is simple, assembly and replacement are convenient, the installation reliability of the whole equipment is improved through the adjustable assembly, and the whole equipment is not prone to falling off.

The invention provides a vision testing device and a using method thereof. The vision testing device disclosed in the present application can be used to measure ametropia, visual acuity, and combinations thereof. A vision testing device has a tilted screen for displaying one or more characters, symbols or predefined patterns. The one or more characters, symbols, or predefined patterns are shrunk by the first and second mirrors before being visually presented to the eye of the subject.

This visual inspection system comprises: a visual acuity inspection image presentation unit that presents, to a subject, a visual acuity inspection image including a visual target for measuring the visual acuity of the subject and a background region around the visual target; a visual acuity inspection image changing unit that changes at least one of the luminance or hue of the visual acuity inspection image; and a visual acuity measurement unit that measures the visual acuity of the subject by inspecting whether the subject can recognize the visual target when viewing the visual acuity inspection image.