132 results about "Vision test" patented technology

An apparatus for determining the refraction of a patient's eye includes a wavefront measurement device that determines aberrations in a return beam from the patient's eye viewing a target through a corrective test lens in the apparatus. The wavefront measurement device preferably outputs an display representative of the quality of vision afforded the patient through the test lens. The display may be, e.g., a representation of a Snellen chart convolved with the optical characteristics of the patient's vision, an overall quality of vision scale, or the optical contrast function, all of which are based on the wavefront measurements of the patient's eye. The examiner may use the display information to conduct a refraction examination or other vision tests without the subjective response from the patient.

A system and method for remotely ordering and purchasing eyeglasses via a network includes a user interface unit, an eyeglass ordering and marketing service center, and a network that connects therebetween. The system includes an eyeglass frame selection unit for selecting eyeglass frames from among a plurality of eyeglass frames in response to user input, a unit for creating display information concerning eyeglass frames, a unit for testing the vision of the user, and an eyeglass lens selection unit for selecting lenses from among a plurality of eyeglass lenses in response to user input. The system also includes an eyeglass ordering and marketing processor wherein the frame selection unit, the vision test unit, and the lens selection unit performing a vision test in response to the requirements of the user. Appropriate eyeglass frames and eyeglass lenses are determined which best fit the user.

The invention relates to a vision tester, which comprises a control module, a display module, a test result processing module, a memory module, an input module, a distance detection module and a distance-vision grade database, wherein the control module is respectively connected with the display module, the test result processing module, the memory module, the input module, the distance detection module and the distance-vision grade database. The vision tester is highly portable, and cannot be limited by regions and time; a tester can independently carry out a vision test, and the vision tester is extremely convenient to operate; the interference of anthropic factors is prevented, and therefore the test result is accurate; and a test result and related advices can be obtained in time.

In one aspect, there is provided a handheld vision tester comprising a display, cursor control, interface port, and camera. The display delivers a series of images making up vision tests to a user who interacts with the vision tests by using the display and cursor control of the handheld vision tester. The camera verifies the user is taking the vision tests. The results of the vision tests are stored in the handheld communication device. The interface port allows for communication of the stored results of the vision tests with external devices. In another aspect, there is provided a calibration system for the handheld vision tester. The calibration system includes a stand to hold the handheld vision tester and a reflective surface substantially parallel to a display of the handheld vision tester.

The invention discloses a method for testing vision with a mobile phone and the mobile phone. The testing method includes the following steps: (1) using the mobile phone to receive a horizontal distance (S) between eyes of a tester and the mobile phone, (2) adjusting a currently tested icon from a standard size on a standard vision test table into a testing size with the mobile phone so as to be output onto a display screen of the mobile phone in accordance with the horizontal distance (S) which is received in the step (1), (3) receiving the tested results of the tester with the mobile phone, (4) judging whether the mobile phone tested results are correct or not, entering a test of a next testing icon to repeat the step from (2) to (3) if the tested results are correct, and converting the smallest size of the icon which the tester can recognize correctly into a visual value for outputting so that the test is over if the tested results are not correct. By the aid of the method for testing the vision with the mobile phone and the mobile phone, the tester can test the vision at any time and at any place, the fact that others testers detect and show the icons does not need extra standard test space also does not need, and thus the method for testing the vision with the mobile phone and the mobile phone are very convenient and practical.

The invention discloses a method for detecting the vision of an infant. The method comprises the following steps of A, setting system parameters, wherein the system parameters comprise an initial detection vision value, the distance from a display to the infant, the time interval of changing the position of a pattern for one time and the test times of each vision value; B, drawing the attention of the infant; C, displaying an infant selective watching chart on an image display, wherein the selective watching chart is formed by vision test bar grating patterns and a grey background, and the width of each bar grate corresponds to one vision value in the international standard vision chart; D, changing the positions of the bar grating patterns in the selective watching chart; testing each vision value according to the test times set in the step A; E, adjusting a next test vision value according a test result in the step D until a highest vision value is detected. According to the method disclosed by the invention, the selective watching capacity of the infant can be objectively, effectively, conveniently and automatically identified.

A vision test system based on computer and multimedia technique for testing the vision and the chromatic discrimination power of human eye is composed of computer, image pick-up card, camera head, sound enclosure, wireless operator and printer. Its test method includes such steps as automatically and randomly generating E or C characters and choosing the chromatic patterns by system, providing their answers by a person to be tested via wireless operator, and judging the vision and chromatic discrimination powder of the person by system.

The invention provides a vision test method and a smart terminal. The vision test method includes the steps that the smart terminal acquires the distance between the smart terminal and a testee; according to the distance, the size of a first vision test pattern is adjusted; feedback information of the testee is obtained; according to the feedback information, the vision condition of the testee isjudged. Through the vision test method and the smart terminal, the vision of the testee is rapidly tested on the smart terminal. The testee can be aware of own vision changes in time, and the vision of the testee is well protected.

The invention discloses an eyesight testing method and device, electronic equipment and a computer storage medium. The method comprises the steps of measuring the test distance between an examinee anda vision test card case; according to the test distance, adjusting the display size of a vision test card displayed in the vision test card case; through the adjusted vision test card, testing the eyesight of the examinee, and obtaining the eyesight value of the examinee. In this way, the eyesight testing process is not affected by a site, even when the site cannot meet the requirement for a standard distance, the eyesight still can be accurately tested, and great convenience is brought.

A system for eyesight diagnosis may include a vision test unit and a controller. The vision test unit may include at least one eye movement tracking unit configured to track the movement of a portion of the eye, at least one screen for visual stimulation and a shuttering unit configured to controllably block the field of view (FOV) of each eye separately. The controller may be configured to: display to a patient a first visual stimulation on the at least one screen, cause the shuttering unit to block the FOV of a first eye of the patient while unblocking the FOV of a second eye, receive a first signal indicative of the second eye movement of the patient from the at least one eye movement tracking unit and diagnose the patient's eyesight based on the received first signal.

The invention discloses a test circuit for a display device, comprising multiple array test circuits and a vision test control circuit, wherein each array test circuit comprises multiple CMOS (complementary metal oxide semiconductor) transmission gates and multiple branch switches; the input end of each CMOS transmission gate is connected with a power signal, the output end of each CMOS transmission gate is connected with the corresponding branch switch, and a first control end and a second control end are respectively connected with an output signal of the vision test control circuit and the inverted signal of the output signal of the vision test control circuit; and the vision test control circuit is used for controlling the branch switches to switch off through the CMOS transmission gates during vision test. When the test circuit is used for carrying out a vision test, the branch switches of array test circuits are not suspended in midair, so that the test circuit is not interfered by the outside environment, and the accuracy of the test result is guaranteed; and meanwhile, the number of power signal gaskets is reduced, and the difficulty in selecting IC (integrated circuit) or FPC (flexible printed circuit) during design is reduced.

An apparatus for determining the objective refraction of a patient's eye includes a transparent window and a wavefront measurement device that determines aberrations in a return beam from the patient's eye after the beam passes through a corrective test lens in the apparatus. The wavefront measurement device outputs an instant display representative of the quality of vision afforded the patient through the test lens. The display can be a representation of a Snellen chart, convoluted with the optical characteristics of the patient's vision, an overall quality of vision scale or the optical contrast function, all based on the wavefront measurements of the patient's eye. The examiner may use the display information to conduct a refraction examination and other vision tests without the subjective response from the patient.

The invention relates to a test device, in particular to a rapid vision test device for medical ophthalmology, and aims to provide a rapid vision test device which is used for the medical ophthalmology, is high in working efficiency, enables pressure of workers of hospitals to be low and saves time. The rapid vision test device for the medical ophthalmology comprises a bottom plate, a chair, a left support, an eye shielding ring, an electric push rod, a rotating shaft, a first motor, a visual chart, a roller, a contact rolling wheel, a first connecting rod, a third motor, a sliding sleeve, a lifting rod, a second connecting rod, a sliding rail, a sliding block, a rack, a gear, a second motor, a support rod and an indicating bar. The device has the effects of being high in working efficiency, enabling the pressure of the workers of the hospitals to be low and saving time, vision can be tested conveniently, the number of medical workers is reduced , and services of the hospitals are improved continuously.

The invention discloses an online optometry system and method, wherein the system includes a mobile client, a display device, and an optometry server, wherein the optometry server is used to provide optometry test information to the display device, according to the mobile client Reply information to adjust the size of the optometry target in the optometry test information output by the display device of the optometry center, and send the optometry result to the mobile client of the optometry center according to the reply information of the mobile client user of the optometry center after adjusting the size of the target. The test information includes an association relationship between the optometry test and its test information, wherein the test information includes an optometry chart and/or question-and-answer information. The present invention can realize optometry only through a display device and a mobile terminal, which is simple and easy, and the user does not need to go to an optical shop or a hospital for optometry, so that the optometry efficiency is high and the user experience is good.

The invention relates to the technical field of computers, aims to solve the problem of low accuracy of an existing stereoscopic vision test method, and provides a dynamic and static stereoscopic vision test method and a terminal. The dynamic and static stereoscopic vision test method comprises the following steps: receiving a preset stereoscopic vision speed and parallax value, and generating a stereoscopic vision test image; receiving first test information, generating a first stereoscopic vision test result, if the first stereoscopic vision test result is qualified, adjusting the parallax value of the specified sighting target in a stepped manner, receiving second test information, and generating a second stereoscopic vision test result; and if the second stereoscopic vision test resultis qualified, controlling the parallax value of a specified sighting mark to be continuously increased from zero to a preset parallax value, adjusting the parallax value of the specified sighting mark to be zero, controlling the parallax value of the specified sighting mark to be continuously increased from zero to the preset parallax value, controlling all the sighting marks to move horizontallyin random directions in this way, ad receiving third test information; and generating a stereoscopic test result according to the first test information, the second test information and the third test information.

The invention discloses a human vision monitor which comprises a transmitting unit, a monitoring unit and a power controller. The monitoring unit comprises a receiving unit, a clock circuit, a memory card, a data processor, a display screen and an EEPROM (electrically erasable programmable read-only memory), and the data processor is used as a core element of the monitoring unit and is used for analyzing data and exchanging the data. The human vision monitor has the advantages that vision tests can be independently completed for users in real time by the aid of the monitor, vision test results can be stored, and vision conditions in a period of time can be retrieved according to requirements of the users, so that the users can conveniently query vision change conditions in the period of time; the users can observe the vision change conditions in the period of time while the vision of the users is monitored, so that a vision change warning effect can be realized for the users; the vision of the users can be conveniently tested by the aid of the human vision monitor, the test results are accurate, and the vision change conditions can be tracked for a long time owing to a data echoing function of the human vision monitor.

The invention provides an intelligent facility detection device comprising a shell, a controller, a voice storage module, a lens turning mechanism, a liquid crystal vision test chart, a touch screen, answering buttons and a printer. The shell is provided with a left sight hole and a right sight hole; the lens turning mechanism is provided with a left eye lens mechanism and a right eye lens mechanism corresponding to the left sight hole and the right side hole respectively. The intelligent facility detection device is characterized by intelligent fully-automatic one-button operations, increases the accuracy of detection results, prevents myopia test card printing error, detection distance error, detection time error, error caused by single-eye viewing instead of double-eye viewing, operation error, counting error, and subject cooperation error, increases the detection efficiency, standardizes detection result records, provides voice interaction, improves the enthusiasm of subjects, has complete functions, can be used for both detecting and training facility, and can monitor and guarantee the training effect and improve the training efficiency.

The invention provides a vision test method and device. The method comprises the steps that a test request sent by a user terminal is received, and height information of an object is acquired according to the test request; a vision test image is displayed at the height matched with the height information; a test result returned by the user terminal is received; the vision of the object is evaluated based on the test result and a preset judgement criterion.

The invention relates to a vision test chart, a vision chart back lighting technology, a vision chart control system and an LED (light emitting diode) solid state lighting energy saving technology, in particular to a medical LED (light emitting diode) vision test instrument. The medical LED vision test instrument has the technical scheme that the medical LED vision test instrument comprises a sighting target plate, light sources, a main body machine case and an auxiliary protecting cover, wherein a plastic cement case is adopted as the main body machine case, the plastic cement case and a bottom plate form a main body sealed case of the test instrument, the main body sealed case mainly provides the protection and support effects for the vision test instrument, the light sources are a plurality of LED light sources which are uniformly distributed in the main body machine case and are arranged on a base plate, and the protecting cover is made of transparent acrylic materials. The medical LED vision test instrument has the beneficial effects that on the basis that the test functions are various, and the surface brightness of the sighting target plate is uniform and constant, the effects of remote operation, portability, simplicity, energy saving and the like are further realized, so better use prospects are realized.

The invention discloses an electronic astigmatic chart for measuring astigmatism focal power. The electronic astigmatic chart comprises a plurality of astigmatic axes intersecting at one point and vision test letters located at two ends of the astigmatic axes, and the vision test letters at two ends of each astigmatic axis are identical in size. During the whole process of astigmatism focal power measuring, only a cylindrical lens is adjusted instead of adjusting of the cylindrical lens and a spherical lens, and the astigmatism focal power can be measured fast and accurately.