54 results about "Visual acuity chart" patented technology

The invention provides a remote control adjustable visual acuity chart, and belongs to the technical field of visual acuity charts. The remote control adjustable visual acuity chart comprises a box body formed by connecting an outer shell and a panel. A bottom plate and a guide plate are arranged in the box body in parallel. Vision mark rotating systems are arranged between the bottom plate and the guide plate in a matched mode. A control circuit board used for controlling the vision mark rotating system is fixedly arranged on the guide plate. Each vision mark rotating system comprises a motor fixedly arranged on the bottom plate, a rotating sleeve connected with the motor in a transmission mode, a lampshade fixed to the rotating sleeve, and a vision mark fixed to one end of the lampshade. Lamp holders are arranged in the lampshades in a matched mode. A set of LED bulbs are fixedly arranged on each lamp holder. The remote control adjustable visual acuity chart has the advantages that the vision marks are reduced; the influences on view angles are reduced, and the testing accuracy is improved; due to the remote control, no indication sticks are needed, and the influences of the indication sticks do not exist; meanwhile, due to the fact that only one grade of illumination is used in each time of remote control, the view marks randomly rotate, and the possibility that tested people improve the tested vision by remembering the visual acuity chart is eliminated.

The invention relates to a method and experimental device for carrying out vision measurement by adjusting objective and background luminance. According to the method and experimental device for carrying out the vision measurement by adjusting the objective and background luminance, a colorless dull polish film is used as an attenuation sheet to control the luminance of an objective light source, diffuse reflection white foam of high reflectance is used for reflecting changes of the luminance of a background control light source, under the situation that the luminance of the objective light source or the luminance of the background light source in a visual field is maintained to be unchanged, the luminance of one of the objective light source or the background light source is changed in an infinitely variable mode to achieve different objective contrast ratios, a standard logarithmic visual acuity chart is taken as an observation visual standard in a hollow mode, and therefore the vision degrees under contrast ratios of different objectives are measured. The method and experimental device for carrying out the vision measurement by adjusting the objective and background luminance can enable illumination levels under all kinds of visual conditions to be simulated, can quantitatively evaluate the quality of different types of light sources (such as LEDs, high pressure sodium lamps and high pressure mercury lamps) in illumination engineering, and can quantitatively measure the visual degrees of objectives in different illuminating levels (such as photopic vision, scotopic vision or mesopic vision).

A diopter adaptive adjustment method and a head-mounted display device (100) are provided. The diopter adaptive adjustment method includes: in response to the diopter correction signal, a display screen (P1) including the visual acuity chart (T1) is outputted through a first preset optical path; when the optometry of the eye receiving the display screen (P1) output by the first preset optical pathis determined to be completed according to input, the display screen (P1) including the visual acuity chart (T1) is output through the second preset optical path; and the second preset is determinedaccording to the input. When the optometry of the other eye of the display screen (P1) of the optical path output is completed, the diopter adjustment module (30) of the diopter control device (100) according to the left and right eye optometry controls the first and / or second preset. The focal length of the light path is adjusted. The head-mounted display device (100) and the diopter adaptive adjustment method can automatically adjust according to the user's diopter to correct the diopter of the user.

The invention discloses a Kinect based interactive visual target display system and optimization method, relating to visual target display systems and methods. By adopting the system and the optimization method, the sight distance between a subject and a visual target display unit can be accurately measured, and visual target display is decided according to the distance between the subject and the visual target display unit. The system and the optimization method have the beneficial effects that visual targets corresponding to the sight distances between the subject and the visual target display unit are further displayed according to the difference of the sight distances, so that a visual acuity chart is no longer single; a Kinect judges whether the choices made by the subject are correct via an own skeleton tracking system, thus truly achieving man-machine interaction and reaching efficient and accurate standards; during visual target testing at the same level, the visual targets at the same level are used for testing at least twice, and at most four times and display of the visual target directions each time is random and unrepeatable, thus reducing the chance when the subject distinguishes the visual target directions; and during conversion testing of visual target levels, the stop standards of visual target display are set, and final visual targets are displayed.

The invention provides a seat system for vision detection. The seat system comprises a base, a lifting mechanism, a chair body, a lifting control switch, a telescopic part, a light receiver, a guide rail and an infrared light transmitter, the lifting mechanism is connected with the base and the chair body, the lifting control switch controls the lifting mechanism, one end of the telescopic part is arranged on the chair body, the light receiver is arranged on the telescopic part and can move along with stretch and shrink of the telescopic part along the vertical direction, so that the light receiver and eyes of a vision detection person are positioned on the same horizontal line, the guide rail is arranged on one side of a standard visual acuity chart, and the infrared light transmitter can move along the guide rail, so that the infrared light transmitter and a detected sighting mark of the standard visual acuity chart are positioned on the same horizontal line. When the light receiver and the infrared light transmitter are positioned on the same horizontal line, the lifting mechanism stops operation, and the eyes of the vision detection person and the detected sighting mark are positioned on the same horizontal line, so that vision detection accuracy is improved.

The invention discloses a visual chart, which comprises a visual chart body, wherein the visual chart body is provided with a plurality of test cards which rotate around a spindle; the test cards are fixed on the visual chart body by dowels; the test cards are round or square; and the test cards are provided with a word 'E'. Because the test cards can rotate around the spindle, the direction can be continuously changed, and certain cheating phenomena in the optometry can be effectively avoided. The visual chart has the advantages of simple structure and convenience in use.

The invention relates to a visual acuity screening method. The visual acuity screening method comprises the following steps: establishing a connection relation between a mobile end and a visual acuityscreening apparatus, and loading an information interface at the mobile end; transmitting personal information of a user to a main controller of the visual acuity screening apparatus via operation onthe information interface; and then, starting visual acuity test on the user by the visual acuity screening apparatus. The visual acuity screening apparatus is provided with an indicator stick, and adriving device connected with the indicator stick; the main controller correspondingly controls the working state of the driving device; the driving device is used for driving the indicator stick tomove along a plane of a visual acuity chart; the indicator stick is used for indicating visual targets on the visual acuity chart, as well as synchronously acquiring the directions of visual targets inputted by the user and recording whether the directions of the visual targets inputted by the user are in coincidence with the set directions of the visual targets; and then, recorded results are sorted out so as to obtain a visual acuity inspection result. The visual acuity screening method needs no auxiliary detection by assistant personnel at all, so that visual acuity inspection can be done by a user himself / herself; and thus, visual acuity screening becomes more common and convenient.

The invention relates to a vision detection method and device, a computer storage medium and a computer apparatus. The vision detection method includes: acquiring a position indicated by an indicatorrod when the indicator rod indicates a visual mark on a visual acuity chart; obtaining corresponding visual mark information at the position according to the stored visual mark information table; receiving a response signal from a subject to a visual target at the location; judging whether or not the response signal is wrong is judged according to the visual target information. If yes, the numberof errors is recorded and whether or not the number of errors satisfies the preset condition is judged. If yes, the visual detection result of the subject is outputted. The method performs positioningand judgment by a machine and outputs a vision detection result without requiring too much professional knowledge of the operator and requiring the operator to write down the detection result by hand, thereby improving accuracy and saving time and energy of the operator. The invention also provides an eyesight detection device, a computer storage medium and a computer device.

The invention discloses a system and a method for reading visual acuity examination. The system comprises a reading visual acuity examination APP module, which is used for acquiring a parameter setting instruction, setting a reading parameter of a reading visual acuity chart, controlling display of a reading visual acuity chart, and analyzing and recording a reading time of the subject. Reading accuracy and reading critical visual indicators, analyzing the relevant data of the records and giving the analysis graphics to diagnose the reading vision of the subject; the display module is used todisplay the reading visual acuity chart. The system and the method can not only clearly display all the visual targets of the decimal point recording 0.06 to 2.0 in the close-range inspection of 25 to40 cm, but also record the reading time, the reading accuracy and the reading critical target size through the speech recognition engine. A graphical analysis of reading vision is given to accuratelyand quickly test the subject's text recognition ability and reading speed.

The invention discloses an interactive distant-vision automated training method, and relates to the technical field of optometry. By the adoption of the interactive distant-vision automated training method, the technical problem of training eye muscles is solved. The method includes the steps that an automated training device composed of a training terminal, a display screen and a remote controller is adopted, and when adopting the automated training device to carry out automated vision training, a user selects a set of optotypes from a logarithmic visual acuity chart to form an optotype sequence; then, the selected optotypes are displayed one by one on the display screen in a from-large-to-small mode, and every time when one optotype is displayed, the user adopts a direction button on theremote controller to send a remote control signal representing the direction to the training terminal; if the direction of the remote control signal accords with that of the current optotype, it is determined that the user selects correctly, and otherwise, it is determined that the user selects wrongly. The interactive distant-vision automated training method is particularly suitable for homes touse.

Disclosed herein are system and method for testing and analysis of visual acuity and changes using an acuity model, the acuity model generated based on one or more acuity chart design parameters and candidate acuity parameters calculated using the acuity test data of the subject, the acuity model comprising a chart-specific psychometric function determined using a family of multiple-optotype psychometric functions, and wherein the acuity model is configurable to estimate possibility of obtaining the acuity test data of the subject.

The invention discloses an intelligent vision detector based on a gesture recognition technology and a using method thereof. The intelligent vision detector comprises a detector body, an infrared distance measuring device and an image collecting device; a first electric wire is connected between the detector body and the infrared distance measuring device, and a second electric wire is connected between the detector body and the image collecting device; a main controller device and an algorithm device are mounted in the detector main body, and a display and a loudspeaker are arranged at the front end of the detector main body. According to the intelligent vision detector based on the gesture recognition technology and the use method of the intelligent vision detector, the intelligent vision detector is composed of the high-definition camera, the infrared distance measuring sensor, the display screen and the control device, and compared with a traditional standard logarithmic visual chart detection method and an electronic vision detection device, the intelligent vision detector improves the detection efficiency and reduces the detection cost; intelligentization of the vision detection equipment is achieved, and the intelligent vision detection equipment has important significance in market popularization.

The invention discloses an intelligent vision detection system based on a virtual reality technology. The intelligent vision detection system comprises VR glasses and a mobile terminal; the VR glassesare wirelessly connected with the mobile terminal; and the VR glasses comprise a VR glasses body, a wireless communication module, a visual chart projection module and a vision test module. The invention also discloses the intelligent vision detection method based on the virtual reality technology, wherein the method comprises the following steps: S1, enabling a detected person to wear the VR glasses body, starting the vision detection, and building a virtual visual chart; S2, projecting the virtual visual chart to a screen of the selected VR glasses body; S3, randomly selecting and marking adetection symbol, and feeding back the opening direction of the selected detection symbol by the detected person, until stopping vision detection; and S4, according to all the feedback results, combining a vision detection standard to obtain a vision detection result. According to the invention, the problem in the prior art that vision detection needs a large place and needs to be realized by cooperation of workers is effectively solved, and the working efficiency and the intelligent development of vision detection are greatly improved.

Disclosed is a centesimal visual acuity chart. The centesimal visual acuity chart is characterized in that a centesimal system is adopted to express visual acuity, so that the better the visual acuity is, the higher the score. Each visual target of the visual acuity chart is in the shape of a notched ring, a notch is fan-shaped, a circle center angle is 12.76 degrees, width of the ring is equal to that of the middle of the notch, outer diameter of the ring is 10 times of width of the ring while inner diameter of the same is 8 times of width of the ring, size of the visual targets is in continuous gradient changing, and a vision score difference of each gradient is 10 scores.100 scores is for a test of 5 m, the width of the middle of the notch is 1.454 mm, the visual target of 100 scores is taken as a base point, the size of the visual targets of 90 scores and lower scores is sequentially increased progressively outward by 1.25 times, and the size of the visual targets of 110 scores and higher scores is sequentially decreased progressively inward by 0.8 time. The visual targets can sleeved and overlapped at intervals according to size order to form four groups to be combined into the visual acuity chart, and size of the visual acuity chart is reduced. The visual acuity chart can be made into an electronic product, namely a visual acuity tester, by using a led semitic form to increase interestingness when visual acuity of children is tested.

The invention discloses a vision inspection device which comprises a distance measuring device, a visual chart installing and adjusting device and a visual chart supporting device. The visual chart installing and adjusting device is fixed to the visual chart supporting device for converting and display different visual charts, the distance measuring device is used for measuring the distance between a person to be inspected and the visual chart to be inspected, and the visual chart or the imaging of the visual chart in a mirror is the visual chart to be inspected. During vision inspection, alternative conversion inspection of different visual charts is adopted, when a heterogenous visual chart and a single visual chart are adopted for inspection, the inspection distance between the person to be inspected and the visual chart to be inspected is converted, and therefore the best vision of the person to be inspected is obtained. Whether or not the vision inspected by standard logarithmic visual acuity chart is the real vision judged according to vision differences between different visual charts and different vision inspection results, and the disguised vision can be effectively found.

The invention provides a remote control adjustable visual acuity chart, and belongs to the technical field of visual acuity charts. The remote control adjustable visual acuity chart comprises a box body formed by connecting an outer shell and a panel. A bottom plate and a guide plate are arranged in the box body in parallel. Vision mark rotating systems are arranged between the bottom plate and the guide plate in a matched mode. A control circuit board used for controlling the vision mark rotating system is fixedly arranged on the guide plate. Each vision mark rotating system comprises a motor fixedly arranged on the bottom plate, a rotating sleeve connected with the motor in a transmission mode, a lampshade fixed to the rotating sleeve, and a vision mark fixed to one end of the lampshade. Lamp holders are arranged in the lampshades in a matched mode. A set of LED bulbs are fixedly arranged on each lamp holder. The remote control adjustable visual acuity chart has the advantages that the vision marks are reduced; the influences on view angles are reduced, and the testing accuracy is improved; due to the remote control, no indication sticks are needed, and the influences of the indication sticks do not exist; meanwhile, due to the fact that only one grade of illumination is used in each time of remote control, the view marks randomly rotate, and the possibility that tested people improve the tested vision by remembering the visual acuity chart is eliminated.

The invention discloses a medical test visual acuity device for outdoor display, wherein the medical test visual acuity device comprises a lamp box and a lifting base. The top and the bottom of the lamp box are rotatably connected with an upper mounting frame and a lower mounting frame through rotating shafts respectively; a bracket is arranged between the upper mounting frame and the lower mounting frame, and the bottom of the lower mounting frame is connected with the lifting base through a stand column; the lifting base comprises an upper lifting platform and a base plate, and a lifting cylinder and a lifting rod are arranged between a base plate and the upper lifting platform. The medical test visual acuity device has the advantages of simple structure and convenient use; the lifting base mounted at the bottom of the lamp box of a visual acuity chart can adjust the height of the lamp box of the visual acuity chart according to the actual height of different inspectors, so as to keep the height of the lamp box of the visual acuity chart at the same level as possible with the sight line of to-be-inspected people; the lamp box of the visual acuity chart is rotated by the rotatingshafts according to the sitting posture of the people, and the visual acuity chart on the lamp box is allowed to be in a same horizontal straight line with the sight line of the people, so as to improve the accuracy of the visual acuity examination of the people by the lamp box of the visual acuity chart.

The invention discloses a vision detection method, device, electronic equipment and computer storage medium. The method includes measuring the test distance between the subject and the vision chart box; The display size of the visual acuity chart; through the adjusted visual acuity chart, the visual acuity test is performed on the subject to obtain the visual acuity value of the subject. Through the above method, the visual acuity detection process is not affected by the venue, even when the venue does not meet the standard distance, the visual acuity can still be accurately detected, which is very convenient.

The present invention relates to the field of medical devices, in particular to a two-in-one eye chart light box, which includes a box body, a transmission shaft, a motor, an eye chart, a travel switch, a remote controller, a light-emitting board, a control unit and a receiving unit. The transmission shaft is connected to the top of the box, and the vision chart is wound on the transmission shaft; the travel switch is electrically connected to the control unit; the receiving unit is used to receive the signal from the remote control, and the control unit controls the light-emitting panel and motor. The box is also provided with a light guide plate and reflective paper, the eye chart is sandwiched between the light guide plate and the front panel of the box, and the luminescent plate is sandwiched between the light guide plate and the reflective paper; the box is also equipped with an electromagnetic Iron, the electromagnet is electrically connected with the control unit, and the eye chart is provided with a magnetic piece used in conjunction with the electromagnet. The invention realizes the switching of different eye charts by controlling the transmission shaft through the remote controller, and can adjust the luminous intensity of the light box to meet the needs of patients, thereby improving the accuracy of visual inspection.

The invention discloses a visual training method and device, a terminal, a system and a storage medium. The visual training method comprises the steps of: randomly displaying different training icons,wherein the training icons include at least one type of letters, numbers and E characters, and corresponding visions of the training icons in a visual chart are the same; receiving a selection resultof a user; according to a preset rule, determining whether the selected result is a success or a failure; if the selected result is the success, displaying a training icon smaller than a previous training icon by one size; and if the selected result is the failure, displaying a training icon bigger than the previous training icon by one size until preset training time is reached. According to thevisual training method provided by the invention, the vision of the user can be promoted.

The invention discloses a multifunctional detection visual acuity chart which comprises a rectangular plate body, wherein plugging slots are formed in the rectangular plate body; a black plugboard and a red plugboard are respectively plugged into the plugging slots; the front end surface of the rectangular plate body is coated with a green coating layer; a plurality of circular grooves are formed in the green coating layer; circular turntables are connected into the circular grooves in a plugging manner; E-shaped grooves are formed in the circular turntables; the E-shaped grooves are communicated with the adjacent plugging slots in the rectangular plate body; four positioning slots are formed in the upper, lower, left and right side walls of each circular turntable; the connecting line of two positioning slots at opposite positions is a horizontal line or a vertical line; four positioning ball-head plungers corresponding to the positioning slots are screwed into the inner side walls of the circular grooves; ball heads of the positioning ball-head plungers are embedded into the corresponding positioning slots; arc-shaped shifting handles are formed on the circumferential edges of the surfaces of the circular turntables; the shifting handles are positioned between the adjacent positioning slots. The multifunctional detection visual acuity chart can simultaneously detect red-green color-blindness, and the direction of E can be changed to prevent cheating.

The invention discloses a computer distant and near vision testing system, which relates to the application of the computer technology in the medical care and the hygiene. At present the distant and near vision testing result is manually judged. The production costs of other vision testing testers are high. The technical proposal of the computer distant and near vision testing system for solving the problem is as follow: the visual targets of the international standard visual acuity chart are scanned and processed through software, such as photoshop, to form visual target pictures, programming is performed through the computer VB programming language, the visual target pictures are displayed on a computer in equal ratio according to the hygienic vision testing requirements, the person to be tested inputs the directions of the visual targets through the four direction keys on the keyboard, the result is judged through the computer, and the testing result is automatically added into a data base. The testing system is mainly applied to the screening and examining to the human vision in medical institutions, health agencies, schools, eyeglasses stores and families, the user interface is friendly, the operation is convenient, the prior computer equipment is utilized, and the popularization is easy.

The invention discloses a memorize-proof visual chart which includes a stationary box and a remote control. A monolithic integrated circuit microcontroller and a power device are arranged in the fixing box, the output end of the power device is provided with a moving lever, the moving lever is arranged perpendicularly to the fixing box, a display is vertically and fixedly connected to the end of the moving lever, the upper end of the display is provided with a camera, the camera is electrically connected with the microcontroller of the single chip microcomputer, the power device can set the display and the human head image at the same height through the single chip microcomputer microcontroller under the capturing of the human head image by the camera, the remote controller is controllableand sends a visual acuity value test signal individually, the display can realize the single display of the corresponding vision value test pattern by the single chip microcomputer microcontroller when the remote controller sends the vision value test signal. Thus, the random display of the visual acuity value test pattern is realized, and people are prevented from artificially interfering with and improving the personal visual acuity value test value by reciting and memorizing the visual acuity chart of the fixed structure, so as to improve the authenticity and accuracy of the visual acuityvalue test.

Disclosed is a polarized visual chart projector that generates visual charts polarized differently from each other in order to perform binocular visual inspection. The polarized visual chart projector includes: a first image display device (30a) that projects a first visual chart (40a) polarized in a first direction; a second image display device (30b) that projects a second visual chart (40b) polarized in a second direction; and a beam splitter (50) that directly passes through the first visual chart (40a) emitted from the first image display device (30a), projects the first visual chart (40a) polarized in the first direction toward the subject, and reflects the second visual chart (40b) polarized in the second direction emitted from the second image display device (30b), so that the second visual chart (40c) polarized in a third direction different from the first direction is projected in the direction of the subject.

The invention provides an intelligent vision detection system. The intelligent vision detection system comprises an intelligent visual chart and an input device, the intelligent visual chart comprises a chart box, and a visual chart panel is arranged on the chart box. The visual chart panel is provided with test standard characters, the rear part of the visual chart panel is provided with LED indicating lamps, and the positions and the number of the LED indicating lamps are in one-to-one correspondence with those of the test standard characters on the visual chart panel; the meter box is also internally provided with a single-chip microcomputer programmable controller, a signal receiver and a loudspeaker. The LED indicating lamp, the signal receiver and the loudspeaker are all connected with the single-chip microcomputer programmable controller through signal lines. A direction selection module and a signal sending module are arranged in the input device; the method and the device are used for realizing intelligent operation of vision detection and improving the accuracy and efficiency of vision detection.

The invention discloses a detection method of eyesight and relates to the technologies of human eyesight and colorblindness detection. The invention aims to solve the problem that a person to be tested can remember a visual acuity chart so as to lead the inaccurate test result. The detection method comprises the following steps of: connecting a computer with a display, connecting the computer with a controller by a doctor, controlling the computer via the controller by the doctor so that 'E'-shaped icons with different sizes and different directions or all kinds of color blindness pictures can be displayed on the display, and acquiring the test result according to the responses of the person to be tested. By using the detection method of eyesight provided by the invention, the phenomenon of the inaccurate test result caused by remembering the visual acuity chart by the person to be tested can be avoided at the same time of the eyesight detection.