71 results about "Vision test" patented technology

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 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.

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.

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 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.

The invention provides an intelligent visual training method and system based on AI, and relates to the field of intelligent data processing.The intelligent visual training method comprises the steps that firstly, vision optometry is conducted on a user to collect vision test data, then a target image is displayed in front of the sight line of the user through a display module, and the module can move according to the sight line direction of the user; and when the user watches the target image, creating a three-dimensional visual effect, and finally controlling the moving speed of the display module based on the user vision test data. Therefore, more accurate movement speed control can be realized, the visual training effect can be improved, meanwhile, visual training can be automatically completed, and the problem of human errors in the training process is effectively solved.

The present invention discloses a method for testing vision based on a spatial vision chart. The spatial vision chart includes: n+1 character surfaces, the n+1 character surfaces standing upright on a surface and perpendicular to a horizontal plane, the n+1 character surfaces being parallel to each other, at least one optotype being provided on each character surface, and when multiple optotypes are formed on each character surface, all optotypes on the character surface have the same vertical length, M vision detection lines parallel to the character surfaces are formed on the surface, the n+1 character surfaces are located on one side of the M vision detection lines, and optotype 1 faces the M vision detection lines, the n+1 character surfaces are at different distances from the same vision detection line, and the tester has no visual obstruction between each vision detection line and the optotypes on all character surfaces, and the tester's visual size of the optotypes on the n+1 character surfaces gradually decreases from near to far. By moving a person forward and backward to view the spatial vision chart, a vision test of the visual representation of a three-dimensional spatial environment is achieved.

This device provides a phoropter for examining an individual's eye while observing a target along the optical path. [Solution] The present invention relates to a phoropter (100) for examining an individual's eyes while they are observing a target, the phoropter (100) comprises: - Two optical units (110, 120) for the individual's binoculars, each having an entrance on the target side, an exit aperture on the individual's side, and an optical system for providing different visual acuity correction powers to the corresponding eyes of the individual; - Moving means adapted to adjust the relative positions of the two optical units; - A partial reflection mirror (27) positioned between the optical units and the target; - An image acquisition device oriented toward the partial reflection mirror to acquire an image of the individual's eyes viewing the target through the two optical units; and - An image display device suitable for displaying the acquired image.

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.

1. The name of the design product: electronic device's setting visual acuity test distance graphical user interface. 2. The use of the design product: for electronic device. 3. The design points of the design product: in the graphical user interface. 4. The picture or photo that best indicates the design points: design 1 front view. 5. Design 1 is designated as the basic design. 6. The use of the graphical user interface: for test distance setting when visual acuity test. 7. The change state description of the graphical user interface: click "next" in design 1 front view to display design 1 change state figure 1, click "finish" after selecting test distance in design 1 change state figure 1 to display design 1 change state figure 2, the interaction mode of design 2 and design 3 is the same as that of design 1. 8. A, B, C parts in the view are content picture areas, and X in the view represents replaceable text.

A fundus imaging apparatus (100) is provided with: a light source (11); a scanning unit (20) for scanning a light beam (50) emitted from the light source (11); a first optical system (30) for converging a plurality of light beams (50) to a first convergence point (36), wherein the plurality of light beams (50) have been derived by scanning the light beam (50) with the scanning unit (20) and emitted in different directions from the scanning unit (20); a reflection component (16) provided at the first convergence point (36) and configured to reflect the plurality of light beams (50); a second optical system (40) for converging the plurality of light beams (50) to a second convergence point (46) in an eye (70) of a subject and projecting the converged light beams onto a retina (72), wherein the plurality of light beams (50) have been reflected by the reflection component (16), passed through the first optical system (30), and reflected by the scanning unit (20); a light detector (84) for detecting the plurality of light beams (50) reflected by the retina (72); and an image generation unit for generating a fundus image from the plurality of light beams (50) detected by the light detector (84).