89 results about "Vision testing" patented technology

The invention discloses an intelligent visual chart, and relates to the technical field of vision detection. The intelligent visual chart comprises a controller, a distance sensor, a voice recognition module and a display screen. The distance sensor is used for detecting the distance between a detected user and the display screen; the voice recognition module is used for performing voice recognition on the user voice of the tested user; the controller is used for starting a vision detection process based on the voice recognition result when the distance between the detected user and the display screen reaches a preset detection distance, ending the vision detection process or determining whether the orientation of the detected user for the vision symbols displayed by the display screen is correct or not in the vision detection process; the controller is further used for controlling the display screen to display the vision symbols in the vision detection process and obtaining the vision value of the detected user based on the orientation judgment result of the detected user for the vision symbols displayed by the display screen in the vision detection process. According to the intelligent visual chart disclosed by the invention, the tested user can independently complete vision testing, and vision testing is facilitated.

A vision test can be implemented in a virtual reality (VR) environment using a computer device that includes a head-mounted display (HMD). The computer device can obtain historical vision data of a patient user. Based on the historical vision data, the computer device determines an ordered sequence of vision tests including a first vision test for the patient user. The first vision test is followed by a set of one or more subsequent vision tests of the ordered sequence of vision tests. The computer device executes a user application configured to enable the ordered sequence of vision tests by rendering a user interface on the display. A first visual stimulus of the first vision test is displayed on the user interface. The computer device obtains a user response to the first visual stimulus, and dynamically adjusts one or more subsequent visual stimuli based on the user response.

In some embodiments, initial feedback indicating threshold characteristics (under which a user sees initial stimuli presented on a user interface) may be provided to a prediction model, and a set of predicted characteristics (for a set of locations of the user interface) may be obtained via the prediction model. Based on predicted characteristics associated with one or more selected locations, stimuli may be presented at the selected locations during the visual test presentation. Visual defect information for the user may be generated based on feedback from the visual test presentation. In some embodiments, the selection of the locations to be tested during a visual test presentation may be performed based on a set of confidence scores associated with the predicted characteristics. As an example, the locations may be selected over one or more other locations of the set of locations based on the set of confidence scores.

The invention provides a distributed camera vehicle ADAS electromagnetic immunity test system and method, and the system comprises a semi-anechoic chamber, the top of the semi-anechoic chamber is symmetrically provided with a plurality of radiation emitters, and the inner bottom of the semi-anechoic chamber is provided with a fixed ribbon and a simulation guide rail; a foresight test platform which is installed right in front of the test vehicle and is used for simulating a road scene in front of the test vehicle; the two groups of side view test platforms are respectively arranged on the side surfaces of the test vehicle and are used for simulating the road scene on the side surfaces of the test vehicle; the road condition simulation assembly is installed on the simulation guide rail and used for simulating the positions of vehicles and pedestrians around the test vehicle; and the main control system is used for controlling the radiation emitter, the simulation guide rail, the foresight test platform, the side view test platform and the road condition simulation assembly to operate and collecting related data. According to the invention, the electromagnetic anti-interference capability of the ADAS function of the vehicle can be verified.

This application is directed to implementing a vision test by an electronic device having a head-mounted display (HMD). The electronic device executes a user application associated with the vision test, and obtains an instruction to implement a target vision test. A target user interface is selected between a virtual reality (VR) user interface corresponding to a three-dimensional (3D) virtual environment and an augmented reality (AR) user interface corresponding to a 3D AR environment. The electronic device implements the target vision test on the target user interface. In some embodiments, the VR user interface has a background view (e.g., a static beach view, a static city night scene, a dynamic traffic view) on which visual stimuli are overlaid. In some embodiments, the electronic device enables the AR user interface by setting the HMD to show a field of view and overlaying visual stimuli on the field of view.

The invention relates to the technical field of ophthalmology medical information systems, in particular to a child vision screening and tracking system and method based on computer vision, and the system comprises an eyeball movement analysis module which is used for collecting and analyzing eyeball movement data; the AR test module is used for carrying out eyeball movement enhancement and vision test; the vision development prediction module is used for predicting the vision development trend; the vision knowledge base is used for providing professional knowledge support; the intelligent assistant module is used for providing personalized suggestions; the system background is used for realizing data uploading and statistical analysis; according to the invention, a comprehensive and intelligent children vision health management platform is constructed. By integrating advanced technologies such as computer vision, augmented reality, artificial intelligence and the like, the system realizes full-process automation from data acquisition, analysis and processing to prediction and suggestion. The efficiency and accuracy of vision screening are greatly improved, and powerful technical support is provided for long-term management of vision health of children.

Brain activity can be monitored to facilitate a vision test in a virtual reality (VR) environment using an electronic device that includes a head-mounted display (HMD) and a plurality of electrodes. The electronic device can execute a user application configured to enable a virtual vision test, and generates a VR user interface corresponding to a three-dimensional (3D) virtual environment. The electronic device renders, on the HMD, a user interface including a first visual stimulus corresponding to the virtual vision test. While displaying the visual stimulus, in real time, the electronic device collects a plurality of electrical signals by the plurality of electrodes that contact a head of a user, and determines information of at least one of a second visual stimulus following the first visual stimulus and a user response to the first visual stimulus based on the plurality of electrical signals.

This application is directed to implementing a vision test based on an avatar in a virtual environment. An electronic device includes a head-mounted display. The electronic device executes a user application configured to enable a virtual vision test, and generates a virtual reality (VR) user interface corresponding to a three-dimensional (3D) virtual environment. The electronic device obtains user information of a user associated with the electronic device, and concurrently displays an avatar and a sequence of visual stimuli on the VR user interface. While displaying each respective visual stimulus, the electronic device determines avatar characteristics based on the user information and the respective visual stimulus, and adjusts display of the avatar adaptively based on the avatar characteristics. The avatar characteristics includes a location of the avatar in the 3D virtual environment.

The utility model discloses a portable foldable far-vision testing chart, which comprises a dial plate member, the dial plate member is provided with an inclined plane, and testing scales are arranged on the inclined plane; a supporting frame body is arranged above the dial piece, the bottom end of the supporting frame body is fixedly connected with the dial piece, the two sides of the top end of the supporting frame body are rotationally connected with a first reflection assembly and a second reflection assembly, a first reflection mirror is arranged in the first reflection assembly, and a second reflection mirror is arranged in the second reflection assembly; the first reflecting mirror is located between the dial plate piece and the second reflecting mirror and reflects the test scales on the dial plate piece to the second reflecting mirror, and the second reflecting mirror is located above the first reflecting mirror and reflects the test scales reflected to the second reflecting mirror to the eyes of a tested person. According to the utility model, the indoor space occupied by the test distance is effectively shortened; vision testing work can be carried out in a small indoor space, and the using effect of the visual chart is improved.

The invention provides a vision change condition monitoring device, and relates to the technical field of vision detection.The vision change condition monitoring device comprises a laser speckle generation system and a cam zoom system.The laser speckle generation system comprises a laser source and a diffuse reflection disc, and the diffuse reflection disc rotates around the center axis of the diffuse reflection disc; and a slit, a field-of-view segmentation inversion system, and a radially rotating third prism, wherein the third prism rotates the incident beam. The laser source emits laser, the laser forms laser speckles after passing through the rotating diffuse reflection disc, the laser speckles form diffraction fringes after passing through the slit, the diffraction fringes are changed into two groups of fringes with opposite movement directions after passing through the view field segmentation inversion system, and the two groups of fringes reach the cam zoom system after passing through the third prism rotating in the radial direction. And finally reaching the fundus retina. The vision change condition monitoring device provided by the invention is simple and reliable, a patient does not need to distinguish the clearness of an image, astigmatism can be measured besides myopia and hyperopia, and the device is convenient to use.

The invention discloses an infrared remote control visual chart-oriented synchronous mirror image control vision examination auxiliary system, which comprises an infrared receiving and transmitting device and a PC terminal, the infrared receiving and transmitting device comprises a development board, an infrared receiving module and an infrared transmitting module, and the PC terminal comprises a PC and is equipped with a bar code or two-dimensional code scanning gun and a bar code thermal printer. The PC is connected to an internal network and is connected with the development board; a signal pin of the infrared receiving module is connected with a digital pin D3 of the development board, a signal pin of the infrared transmitting module is connected with a digital pin D2 of the development board, and power supply pins of the infrared receiving module and the infrared transmitting module are respectively connected with a 5V pin and a GND pin of the development board; coding analysis software for infrared remote control of the visual chart and synchronous mirror image software for the infrared remote control visual chart are written in the PC, an infrared signal analysis database is established through the coding analysis software, and the software receives and sends infrared coding data through a COM port and an infrared receiving and emitting device.

The invention relates to the technical field of vision detection equipment, in particular to a vision detection device. The internal projection device comprises a display assembly used for projecting a visual chart, an imaging support movably connected with the display assembly, an internal projection base arranged below the imaging support and used for being matched with the display assembly, a driving assembly used for changing the projection angle of the display assembly and a connecting rod assembly. And the imaging bracket is internally and movably connected with a rotary reflector assembly which is matched with the inner projection base and is used for changing a projection light path of the display assembly. The method has the advantages that the problem that the visual function detection equipment is difficult to efficiently switch the detection state in the same scene is solved, and the flexibility of the detection equipment is improved.

1. Name of the product in this design: Vision tester (self-service). 2. Purpose of this design: For vision testing. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1. 5. As shown in other views, the top view is omitted; the bottom surface of this design product is a part that is not easily seen or cannot be seen during use, so the bottom view is omitted.

The invention relates to a method for checking at least one visual impression of a test subject by means of a vision testing system, wherein the vision testing system comprises a lens carrier receptacle that serves to receive a lens carrier and is successively mounted, from distal to proximal, between a corneal optical unit 40 and an eyepiece optical unit 45 on a central visual axis 21 of the optical beam path, said method comprising at least the following steps: (a.) positioning a first lens carrier with an intraocular lens in the lens carrier receptacle of the vision testing system; (b.) displacing the corneal optical unit 40 and the lens carrier receptacle with the intraocular lens along the visual axis 21, with the eyepiece optical unit 45 remaining at a fixed distance from at least one eye of the test subject; (c.) acquiring at least one piece of information indicative of the visual impression; (d.) assigning the at least one piece of indicative information to the first intraocular lens. The invention also relates to vision testing systems and to a lens carrier.

The invention discloses a student vision detection and management system based on edge artificial intelligence gesture recognition. The method comprises the following steps: firstly, judging identity information of a detected object student through a face recognition technology; if the comparison succeeds, the system confirms the standing position of the student through ultrasonic ranging, and preparation is made for vision detection. Then the screen displays' E 'for vision examination, gestures of the student are detected through the camera, and parents can check the vision condition and change condition of the child through the mobile phone applet end and take corresponding measures in time. The product can be deployed in public positions of teaching buildings of all schools in a sporadic manner, students can perform self-testing at any time / at regular time, individual and group vision data is persistent in the cloud for subsequent deep analysis and mining, such as transverse comparison and longitudinal analysis of different regions, different age groups and different genders, and the distribution condition and the change trend of vision problems are deeply understood. And a scientific basis is provided for making a targeted vision care plan.

A telescopic ocular refraction test system includes a display that displays a vision testing image. The system includes a telescope configured to be positioned in front of an eye of a patient for viewing the vision testing image through the telescope. The system also includes a control system that determines a vision correction parameter based on a position of a focus adjustment device that focuses the telescope.

The utility model discloses a bull eye optometry mechanism which comprises a bull eye assembly used for vision examination. A driving motor; the shell is provided with an accommodating cavity, and the side wall of the shell is provided with an optometry hole communicated with the accommodating cavity; the supporting plate is arranged at the top of the containing cavity of the shell, a sliding groove is formed in the supporting plate, and the bull eye assembly is arranged in the sliding groove in a sliding mode; one end of the rotating rod is rotationally arranged on the supporting plate, the other end of the rotating rod corresponds to the sliding groove, and the other end of the rotating rod is connected with the bullseye assembly so as to drive the bullseye assembly to slide in the sliding groove; wherein the driving motor is arranged on the supporting plate, and a rotating shaft of the driving motor is connected with the rotating rod, so that the driving motor drives the rotating rod to rotate. By means of the mode, the bull eye assembly of the bull eye optometry mechanism is adjustable, the bull eye assembly can be driven by the rotating rod to slide in the shell so as to flexibly adjust the position of the bull eye assembly, the bull eye assembly cannot be exposed out of the optometry hole frequently, flexibility is high, and various maintenance operations are facilitated.

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.

An information processing device for estimating eyesight of a person comprises a processor coupled to memory storing machine readable instructions. The processor obtains image data representing an image of an eye and inputs the data into a machine learning algorithm trained to estimate eyesight characteristics from eye images. The system estimates the person's eyesight by determining at least one of myopia, hyperopia, and astigmatism based on the image data and algorithm output. The invention addresses limitations of traditional manual eyesight tests that are prone to human error and subjective patient feedback. The machine learning algorithm analyzes eye relaxation states and micromovements that indicate optimal vision correction, enabling objective automated eyesight assessment deployable in remote locations or consumer devices.

The invention provides an auxiliary vision testing device for the ophthalmology department, and belongs to the technical field of medical instruments. Comprising a seat and a base, a vertical plate is vertically and fixedly mounted on the base, a mirror is fixedly mounted on the vertical plate, the seat comprises a mounting block, side plates are symmetrically and fixedly mounted on the upper top wall of the mounting block, and covering assemblies are arranged on the side plates; the covering assembly comprises a vertical groove formed in the side plate, and a mounting rod is movably mounted in the vertical groove. By arranging the covering plate, a to-be-tested person can rotate the covering plate to a proper position and cover a single eye, meanwhile, the first elastic telescopic rod can fix the horizontal position of the covering plate, and the second elastic telescopic rod can fix the covering plate in the vertical direction, so that the to-be-tested person does not need to hold the covering plate by hand for testing for a long time; therefore, the accuracy of the test result is influenced by the physical strength of the to-be-tested person, and the test accuracy is improved.

1. Name of the product of this design: Graphical user interface for vision test of electronic equipment. 2. Purpose of this design product: used in an electronic device. 3. The design key points of this appearance design product are: the graphical user interface content. 4. The picture or photo that best illustrates the key points of the design: main view. 5. The electronic equipment is of conventional design, and the rear view, left view, right view, top view and bottom view are omitted. 6. Uses of Graphical User Interface: Used for vision testing. 7. Description of the changing states of the graphical user interface: Click "E-shaped Eye Chart" in the main view to enter Changing State Diagram 1; click "Start Test" in Changing State Diagram 1 to enter Changing State Diagram 2; set the test method in Changing State Diagram 2, and click "OK" to enter Changing State Diagram 3. In Changing State Diagram 3, click the answer to the question in the floating window in the lower right corner to display the next question; after completing the answers to the questions in Changing State Diagram 3, enter Changing State Diagram 4. 8. Other situations that require explanation: The X in the view is text content; the filled area is the content screen.

The invention discloses a child vision evaluation method and device, a storage medium and a terminal, and belongs to the technical field of image processing. The method comprises the steps that when a child watches a display screen of the communication terminal, a vision test page is displayed on the display screen, and the vision test page at least comprises a vision test image; when the children use the vision test image to test the vision, test parameters of the children are collected, and the test parameters at least comprise distance parameters between the eyes of the children and the display screen; evaluating a vision test result of the child according to the test parameters; and sending the vision test result to a medical institution terminal, so that the medical institution terminal generates a vision test report according to the vision test result, and feeds back the vision test report to a guardian of the child. According to the application, the eyesight of the child can be evaluated without feeling in the process of using the communication terminal by the child, so that a guardian can find the myopia problem of the child as early as possible and give an early warning, and can also find the error of the eye using habit of the child and timely remind the child.

1. The name of this design product: Eye chart projector. 2. Purpose of this design product: This design product is used for vision testing or screening of the eyes. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic Drawing 1. 5. Designate Design 1 as the base design.

A system for testing and / or training the vision of a user is disclosed herein. The system includes at least one camera, a visual display device having an output screen, and a data processing device operatively coupled to the at least one camera and the visual display device. In one embodiment, the data processing device is programmed to determine a head position, head velocity, and / or head speed of a user during a vision test or vision training routine from a plurality of images of the head of the user captured by the at least one camera. In another embodiment, the data processing device is programmed to determine, based upon an input signal received from a user input device, a contrast display setting for a screen background relative to at least one visual target, the contrast display setting enabling the user to gradually adapt to increasing levels of visual stimulation.

A vision test can be aided with controller actuation in a virtual environment. An electronic device, such as a head-mounted display, can establish a communication link between the electronic device and a controller held by a user associated with the electronic device. A user application can be executed to enable the vision test. The electronic device can display a VR user interface based on a driver license issuing requirement to create a 3D virtual environment, and the VR user interface can include a moving traffic scene on which one or more visual stimuli are displayed. The electronic device can drive one or more actuators of a controller in synchronization with displaying the VR user interface.

The present invention provides a method for calibrating a visual mark displayed on a terminal screen and a vision detection system. The calibration method first generates a reference line segment of a specified pixel on the terminal screen, and then uses a physical ruler to adjust and calibrate the reference line segment displayed on the screen by increasing or decreasing the pixels one by one, until the display length of the reference line segment reaches a specific size marked by the ruler, and then substitutes the pixel adjustment ratio into the conversion formula of the visual mark size for conversion, thereby obtaining the accurate size of the visual mark displayed on the terminal screen. This calibration method does not need to obtain the accurate screen density of the terminal screen, and is not affected by factors such as the manufacturing process of the terminal screen. The calculation is accurate and easy to implement. The vision detection system using this method can ensure that the size of the visual mark seen during the vision detection is consistent with the size of the visual mark seen by other users on their respective terminal screens, thereby effectively ensuring that the vision results detected by the vision detection system on different terminals are consistent and comparable.

The invention discloses a vision detection method, a robot and equipment. The method comprises the following steps: acquiring first image data of a detection object; based on the first image data of the detection object, determining a current vision detection type of the detection object; the current vision detection type is used for representing whether the detected object wears a vision correction appliance or not; based on the current vision detection type of the detection object, determining a vision detection strategy of the detection object; and performing vision detection on the detected object by adopting the vision detection strategy to obtain a vision detection result of the detected object. In this way, the efficiency and convenience of vision testing can be improved.

The invention discloses vision detection equipment, and belongs to the technical field of vision detection, the vision detection equipment comprises a driving device and a vision detection device, the vision detection device is connected with the driving device, so that the driving device can drive the vision detection device to move to detect the vision of different eyes of a user. The driving device is controlled to drive the vision detection device to move, so that the vision detection device does not need to cover the range of two eyes of a user at the same time, the size of the vision detection device can be reduced, the size of the whole vision detection equipment is reduced, and transportation and installation of the vision detection equipment are facilitated. And the driving device can automatically drive the vision detection device to move, so that the operation is simple, convenient and more accurate, the detection error possibly caused by holding the vision detection device by a user is avoided, and the automation degree of the vision detection equipment is improved.

The utility model relates to a vision board, which comprises a vision board main body provided with a test hole for vision examination; and the adjusting plate is movably arranged on the vision board main body, a through hole matched with the shape of the test hole is formed in the adjusting plate, and the position of the through hole can be adjusted by controlling the adjusting plate to move, so that the through hole is overlapped and communicated with the test hole and staggered from the test hole to shield the test hole. According to the vision board, through the matched design of the adjusting plate and the testing holes, an extra small-hole black film or other auxiliary tools are not needed any more, a subject can directly adjust the adjusting plate on the vision board to rapidly switch to a small-hole vision examination mode, and the vision board has the functions of small-hole vision examination and normal vision examination at the same time; the practicability of the vision board is improved, the requirement for replacing or adding additional auxiliary tools in the examination process is reduced, and the complexity and time cost in the examination process are reduced.