CN118078202A - Multi-mode dynamic vision testing system - Google Patents
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Abstract
The invention relates to a multi-mode dynamic vision testing system, which comprises a host, an information acquisition unit, a display unit and a database; the host is provided with a data processing unit, a data storage and retrieval module, a display module and a judgment module; the information acquisition unit is used for collecting information input by the inspector and judging information of the tested person; the display unit is used for displaying a user interface, a sighting target setting interface, a test interface and a result display interface; the database is used for storing the information of the testee and the test information; the data processing unit is used for receiving the information of the tested person collected by the information collecting unit and storing the information in a tested information table in the database through the data storage and retrieval module; the judging module is used for comparing the opening direction of the visual target actually displayed with the judging opening direction input by the tested person in the testing process so as to judge whether the input by the tested person is correct or incorrect; after the test is finished, the test result is displayed in a result display interface of the display unit through the display module.
Description
Technical Field
The invention relates to the technical field of vision testing, in particular to a multi-mode dynamic vision testing system.
Background
Vision is an important way for humans to obtain external information, and vision-related inspection plays an important role in diagnosis, treatment and prognosis evaluation of ophthalmic clinical diseases. Dynamic vision refers to the ability of a subject to discern details of objects that have relative motion with themselves, which are closely related to our lives, including sports, driving, and the like. In current ophthalmic clinical practice vision related examinations focus mainly on static vision, i.e. the target object or light source used for the examination is in a stationary state, including vision, contrast sensitivity, wavefront phase differences, etc. In real life, there is often relative motion between surrounding objects and observers, so that merely evaluating static vision cannot fully reflect the visual quality in real life. On the other hand, the nerve conduction path of dynamic vision is not the same as that of static vision. There are two types of ganglion cells in the retina, of which P ganglion cells are mainly responsible for transmitting visual signals with high spatial frequencies, while M ganglion cells are mainly responsible for transmitting visual signals with high temporal frequencies, i.e. dynamic visual signals. In the visual center, static visual signals are transmitted through the dorsal/ventral dual-flow pathway, while dynamic visual signals are relayed through the critical zone MT/V5 zone and then to zones with different functions, including attention, cognition, eye movement, etc. Therefore, the dynamic vision inspection can provide information different from static vision, and can reflect the vision quality of various scenes for observing the dynamic optotype in daily life more effectively, so that the dynamic vision inspection method has great significance for evaluating the dynamic vision.
The method for checking dynamic vision is mainly divided into dynamic vision of the movement of the optotype and dynamic vision of the static optotype. Wherein during a dynamic vision examination of a static optotype, which is mainly used for the evaluation of vestibular ocular reflex by the otorhinolaryngology, the subject needs to recognize details of the object in a static state while his head is actively or passively rotated. The dynamic vision test of the optotype movement enables the observer in a static state to identify the vision target in a moving state, and judges whether the dynamic vision of the observer is good or bad according to the ability of the testee to identify the details of the moving object. The visual target movement dynamic vision (hereinafter referred to as "dynamic vision") examination method includes two kinds of visual target display by mechanical method and electronic screen display. Wherein the mechanical method displays the optotype and drives the optotype to move by means of a special motor device. The mechanical method shows that the optotype needs a specific device, which is inconvenient for clinical popularization and application. The electronic screen display optotype examination uses the edited program to display the optotype with a certain size, movement pattern and movement speed on the screen, and at the same time, examines the minimum optotype which can be recognized by the testee. The required equipment is easy to obtain and the inspection method is easy to standardize. The prior dynamic vision test is mostly used for scientific research, athlete evaluation and screening of special professions, including drivers, pilots and the like, but no dynamic vision test equipment applied to ophthalmic clinical diagnosis and treatment exists at present. Reasons for limiting the clinical application of current dynamic vision testing equipment include the lack of standardized test targets and test patterns that meet ophthalmic clinical requirements, and the disadvantages of inconvenient operation, long learning curves, etc. of current testing equipment.
The disadvantages of the dynamic vision testing systems of the prior art mainly include:
(1) Current dynamic vision testing systems only display horizontally moving optotypes, but in real life, optotypes with multiple movements are encountered, so that dynamic vision testing of horizontally moving optotypes only has a certain limitation.
(2) The current dynamic vision testing system needs to set various testing parameters before each test, including initial optotype size, optotype movement mode, optotype movement speed, optotype display interval, testing logic and the like, which is inconvenient.
(3) The current dynamic vision test system needs to set each test parameter before each test, if the tested person needs to perform dynamic vision test in multiple modes successively, the inspector needs to return to a setting interface for resetting in the test process and then perform the dynamic vision test, so that the system is inconvenient.
(4) The current dynamic vision testing system can only perform the pre-test in a fixed mode, and cannot adjust the pre-test parameters.
(5) The current dynamic vision test system has no tested information and test information management system, and is inconvenient to store and trace the result.
(6) The current dynamic vision testing system needs the inspector to calculate the result according to the judgment of the testee on the optotype, so that the system is inconvenient.
Disclosure of Invention
The invention aims to provide a multi-mode dynamic vision testing system, and the technical problems to be solved at least comprise how to perform combined setting of a plurality of testing modules according to testing requirements before testing and how to perform dynamic vision testing of a plurality of movement modes.
In order to achieve the above object, the present invention provides a multi-mode dynamic vision testing system, comprising a host, an information acquisition unit, a display unit and a database; the host is provided with a data processing unit, a data storage and retrieval module, a display module and a judgment module;
the information acquisition unit is used for collecting information input by an inspector and judging information of a tested person;
The display unit is used for displaying a user interface, a sighting target setting interface, a test interface and a result display interface;
The database is used for storing the information and test information of the tested person, including a tested information table, a visual target information table and a finished test table, and can be searched and called by using the data processing unit of the host;
the data processing unit is used for receiving the information of the tested person collected by the information collecting unit and storing the information in a tested information table in the database through the data storage and retrieval module;
the data in the tested information table in the database can be accessed through the data storage and retrieval module;
Displaying the information of the tested person in a user interface of a display unit through a display module;
the data processing unit of the host has a sighting mark setting function, can accept setting parameters input by the information acquisition unit, comprises parameters of pre-test and formal test in each test module in each test mode, and displays the setting parameters in the display unit in the test process by the display module;
The judging module is used for comparing the opening direction of the visual target actually displayed with the judging opening direction input by the testee in the test process so as to judge whether the input by the testee is correct or incorrect; after the test is finished, the test result is displayed in a result display interface of the display unit through the display module, so that a result output function is realized.
Preferably, the information input by the inspector comprises basic information of the testee and optotype setting parameters.
Preferably, the basic information of the tested person includes the name, the medical record number and the birth year and month of the tested person.
Preferably, the judging information of the tested person is that the tested person judges according to the opening direction of the observed movement optotype, and one of the judged upper, lower, left or right is input into the judging device.
Preferably, the setting parameters input through the information acquisition unit include a size of the optotype, a movement speed, and a movement pattern.
Preferably, the optotype information table contains basic information of the optotype required for the test, and the optotype is associated with the test distance and the size of the display unit; the test information table contains basic information of the test person.
Preferably, the completed test meter includes test module information under each test, optotype parameters of each test module, and test result data of each test module, which are all associated with the information of the tested person.
Preferably, the multi-mode dynamic vision testing system can preset corresponding custom test modes according to test requirements, each test mode comprises a plurality of test modules, each test module comprises a pre-test and a formal test, and various parameters of the test can be pre-determined, so that quick selection can be performed before the test.
Preferably, the "motion pattern" in the pre-test includes horizontal right to left, horizontal left to right, horizontal random, vertical up to down, vertical down to up, vertical random and diagonal random; the "interval time" is the time interval from the end of the previous optotype movement to the appearance of the next optotype, in seconds; the "pass logic" is a condition for passing the pre-test, and specifically includes the number of the optotypes which are required to be continuously judged to be correct by the pre-test and the number of the optotypes which are required to be continuously recognized to be wrong by switching to the large-size optotype.
Preferably, the "movement pattern" in the formal test includes horizontal right to left, horizontal left to right, horizontal random, vertical up to down, vertical down to up, vertical random and diagonal random; the "interval time" is the time interval from the end of the previous optotype movement to the appearance of the next optotype, in seconds; the "pass criteria" is set in percentage and calculated in rounded fashion to indicate how many subjects are identified as passing a particular size subject during display of that particular size subject.
Preferably, the "optotype size switching mode" in the formal test is logic for switching the size of the test optotype, including a fast mode and a standard mode; the quick mode needs to set the maximum number of optotypes to be displayed under each optotype size, and once the correct number of optotypes is identified by a tested person to reach the passing standard in the test process, the quick mode is immediately switched to the small-size optotype, and the like until the display number under the specific optotype size reaches the total number, the correct number identified by the tested person cannot reach the standard; the standard mode needs to set the maximum number of optotypes required to be displayed for each optotype size, the display number of the optotypes with each size reaches the set number in the test process, after the display is finished, if the number of the optotypes which are identified by the testee to be correct reaches the passing standard, the optotypes are switched to be one-size-smaller optotype, and the like until the number which is displayed under the specific optotype size reaches the total number, and the number which is identified by the testee to be correct cannot reach the standard.
Preferably, the multimode dynamic vision testing system has a sighting target display function; the sighting target display function is used for automatically displaying sighting targets with random opening directions of specific sizes, movement speeds, movement modes and time intervals in the pre-test and the formal test of each test module according to preset parameters, and can automatically switch the sighting target sizes and the test modules according to the preset parameters.
The invention also provides a dynamic vision testing method of the multi-mode dynamic vision testing system, which comprises the following steps:
S1, introducing a test flow: adjusting the distance between the tested person and the screen to enable the tested person to be in line with the testing distance; adjusting the seat height of the tested person so that the eyes of the tested person are positioned at the central level of the screen;
s2, entering a user interface, wherein the upper left part of the user interface is patient information, clicking the new increment can add a new test patient, inputting the name, the birthday and the medical record number of the patient, clicking and storing the input patient information; click modification can modify the basic information of the patient who has completed the test; click searching can search the patient results after the test is completed according to the information; the lower left shows information for all patients who have completed the test; clicking to select one of the patients, clicking the 'modification' to modify the information corresponding to the patient at the upper left; the lower right is the previous test performed by the patient, including test date, test eyes and results; the upper right can quickly select a test mode to be performed; selecting an eye, clicking to start a test and entering the test after the selection is completed; clicking "modify" can modify the current test pattern; clicking "delete" can delete the current test mode;
S3, entering a test mode setting interface: clicking a newly added test mode setting interface in the test mode setting interface;
(1) Inputting self-defined test basic information in the test information, wherein the self-defined test basic information comprises a test name, test conditions and test module interval time, and clicking the save can store the current test information;
(2) Clicking the module plus to increase the test modules, so that a plurality of test modules can be increased, and each test module is displayed in sequence in the test process;
(3) In the setting of the test module, pre-test and formal test parameters are set;
(4) Selecting yes in the pre-test setting, and continuing to set pre-test parameters; setting the initial optotype size, the optotype speed, the movement mode, the optotype interval time, the passing test logic and the pre-test-front-view test time interval of the pre-test;
(5) Setting formal tests, including initial optotype size, optotype speed, movement mode, optotype interval time, pass criteria and pass logic;
(6) Clicking 'save' to save the set parameters; or click "reset" to reset all parameters; clicking 'return', returning to the initial interface;
S4, starting a test:
(1) Clicking a 'start test' in an initial interface to enter a test, clicking a 'space' to start a pre-test;
(2) In the pre-test process, displaying a visual target with random opening directions according to set parameters including the size, the speed, the movement mode and the time interval of the visual target, judging the opening directions of the visual target by a tested person in a time period from the beginning of movement of the visual target to the occurrence of the next visual target, inputting the judgment of the tested person into a judging device by an inspector, and ending the pre-test after the tested person continuously judges the opening directions of the correct 5 visual targets;
(3) After passing the pre-test, waiting for 10 seconds or clicking a space to start the formal test;
(4) In the process of formal test, according to set parameters including initial optotype size, optotype speed, movement mode and time interval, displaying optotype with random opening direction, in the time period from starting movement of optotype to appearance of next optotype, making judgement of opening direction of optotype by tested person, and inputting judgement of tested person by inspector; judging when to switch to a small first visual target according to the set visual target size switching mode, and ending the test;
(5) The results show that:
after the testing of one module is finished, clicking a space to continue to the next module, and if the next module is not available, displaying the module as the "clicking the space to finish the testing";
s5, calculating a test result: the results are displayed in a decimal representation of the optotype, including the minimum optotype that the subject can reach "pass", and the number of optotypes that are one sign smaller than the minimum optotype that the subject can reach "pass", which are connected by a plus sign, can be identified as correct.
Compared with the prior art, the invention has the beneficial effects that:
(1) The dynamic vision testing system of the present invention is capable of displaying optotypes having multiple modes of motion, including horizontal motion, vertical motion, and diagonal motion.
(2) The dynamic vision test system can preset corresponding test modes according to test requirements, and can quickly select the required test modes by one key before testing, wherein the modes comprise preset parameters.
(3) The dynamic vision testing system can support multi-module combined testing, and each module can set independent testing parameters, including initial optotype size, optotype movement mode, optotype movement speed, optotype display interval, testing logic and the like. In the testing process, the tested person can complete multiple dynamic vision tests with different parameters at one time without repeatedly adjusting the testing parameters.
(4) The dynamic vision testing system can adjust pre-test parameters, including the size of the optotype, the movement speed of the optotype, the movement mode of the optotype, the display interval time, the testing logic and the like. Meanwhile, the pre-test parameters can be independently set in each test module, so that the tested test can conveniently finish multi-module and differentiated pre-test setting in one test.
(5) The dynamic vision testing system comprises a user interface which is easy to interact, is convenient for increasing, modifying, searching and storing the information of the tested person according to the keywords, and can display the testing mode and the testing result of each detection of the tested person.
(6) The dynamic vision testing system can automatically display the testing result after testing and store the testing result in the server, and can inquire the result of each examination of the patient in the user interface, thereby being convenient for statistics and tracing.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate and do not limit the application.
Fig. 1 is a schematic diagram of a connection structure of different functional modules in the present invention.
FIG. 2 is a schematic diagram of a user interface in accordance with the present invention.
Fig. 3 is a schematic diagram of a test mode information setting of the test mode setting interface in the present invention.
FIG. 4 is a schematic diagram of a test module configuration of a test mode configuration interface according to the present invention.
Fig. 5 is a schematic illustration of an initial interface in the present invention.
FIG. 6 is a schematic illustration of the interface after passing the pre-test in the present invention.
FIG. 7 is a schematic view of the interface after the test of the present invention.
Detailed Description
The present invention is described in more detail below to facilitate an understanding of the present invention.
As shown in fig. 1 to 7, the multi-mode dynamic vision testing system according to the present invention includes a host, an information acquisition unit, a display unit, and a database; the host is provided with a data processing unit, a data storage and retrieval module, a display module and a judgment module;
the information acquisition unit is used for collecting information input by an inspector and judging information of a tested person;
The display unit is used for displaying a user interface, a sighting target setting interface, a test interface and a result display interface;
The database is used for storing the information and test information of the tested person, including the tested information table, the visual target information table (i.e. visual target data table) and the completed test table, and can be searched and called by the data processing unit of the host computer
The data processing unit is used for receiving the information of the tested person collected by the information collecting unit and storing the information in a tested information table in the database through the data storage and retrieval module;
the data in the tested information table in the database can be accessed through the data storage and retrieval module;
Displaying the information of the tested person in a user interface of a display unit through a display module;
the data processing unit of the host has a sighting mark setting function, can accept setting parameters input by the information acquisition unit, comprises parameters of pre-test and formal test in each test module in each test mode, and displays the setting parameters in the display unit in the test process by the display module;
The judging module is used for comparing the opening direction of the visual target actually displayed with the judging opening direction input by the testee in the test process so as to judge whether the input by the testee is correct or incorrect; after the test is finished, the test result is displayed in a result display interface of the display unit through the display module, so that a result output function is realized.
Preferably, the information input by the inspector comprises basic information of the testee and optotype setting parameters.
Preferably, the basic information of the tested person includes the name, the medical record number and the birth year and month of the tested person.
Preferably, the judging information of the tested person is that the tested person judges according to the opening direction of the observed movement optotype, and one of the judged upper, lower, left or right is input into the judging device.
Preferably, the setting parameters input through the information acquisition unit include a size of a sighting target, a movement speed, a movement mode, and the like.
Preferably, the optotype information table contains basic information of the optotype required for the test, and the optotype is associated with the test distance and the size of the display unit; the test information table contains basic information of the test person.
Preferably, the completed test meter includes test module information under each test, optotype parameters of each test module, and test result data of each test module, which are all associated with the information of the tested person.
In a preferred embodiment, the multi-mode dynamic vision testing system of the present invention is capable of integrating and storing basic information of a subject in a database.
(1) FIG. 2 is a user interface, left side of FIG. 2, for clicking "Add" before testing to enable the addition of information about the subject, including the subject's name, date of birth, and medical record number. After clicking "save", the subject's information appears in the patient list at the bottom left and is saved in the database. And selecting a certain tested person from the patient list, clicking the 'modification', changing the basic information of the tested person, clicking the 'save' again, and modifying the information stored in the database. The key words of the patient information are input in the patient information column at the upper left corner, the 'search' is clicked, related instructions are input into the database and fed back to the patient list at the lower left, and the information of the tested person meeting the corresponding conditions is displayed.
(2) The completed test information and results, including test date, test pattern, test eyes, and test results, are shown as the selected subject at the bottom right of fig. 2. The test mode is a certain test mode which is selected quickly before the test, the test eyes are the test eyes which are selected before the test, and the test results sequentially display the test results of each test module in the test mode.
In a preferred embodiment, the multi-mode dynamic vision testing system of the present invention can preset corresponding custom test modes according to the test requirements, each test mode may include a plurality of test modules, each test module includes a pre-test and a formal test, and various parameters of the test may be pre-determined, so that quick selection may be performed before the test. Clicking on "new" or "modified" in the upper right hand corner of picture 2 may enter the test mode setting interface (e.g., fig. 3 and 4), clicking on "back" in the upper right hand corner of fig. 3 or 4 may return to the user interface.
(1) Test mode information setting: as shown in fig. 3, basic information of the test, including a test name, test conditions, and module interval time, may be set according to the test requirement. The test name can be set according to the actual clinical requirements, such as 'cataract postoperative test', and the like. The test condition setting comprises test distance (unit cm), screen length (unit cm) and screen width (unit cm), and the program calculates the size of the sighting target to be displayed according to the corresponding formulas. The module interval time is the time interval between a plurality of test modules in seconds. After the setting is completed, clicking the save, the set parameters can be saved in the database. Clicking "reset" clears the parameters and can be reset entirely.
(2) And (3) setting a testing module: as shown in fig. 3, clicking on the "module+" above may add a test module, thereby jumping to the module setting shown in fig. 4. Multiple clicks may be made to add multiple test modules.
(3) Pre-test settings: as shown on the left side of fig. 4, the pre-test procedure is set according to the test requirements, including whether to pre-test, initial optotype size, optotype speed, movement mode, interval time, pre-test-formal test interval, pass logic. In the selection of whether to pre-test, if yes, the module contains pre-test, and if no, the module does not contain pre-test. The initial optotype size is the optotype size displayed at the beginning of the pre-test, and is input by a decimal representation method. "optotype speed" is the speed of movement of the optotype in degrees/second during the pre-test. "motion pattern" includes horizontal right to left, horizontal left to right, horizontal randomization, vertical up to down, vertical down to up, vertical randomization, and diagonal randomization. The "interval time" is the time interval in seconds from the end of the movement of the previous optotype to the appearance of the next optotype. The pre-test-formal test interval is the duration of the interval between the end of the pre-test and the frontal test, in seconds. "pass logic" is a condition for passing the preliminary test, where the number of optotypes required to continuously judge correct by the preliminary test and the number of optotypes required to continuously recognize errors by switching to the large one-size optotype can be input.
(4) Formal test settings: as shown on the right side of fig. 4, the formal test procedure is set according to the test requirement, including initial optotype size, optotype speed, movement mode, interval time, and switching modes by standard and optotype size.
The "initial optotype size" is the optotype size displayed at the beginning of the front view test, and is expressed by a decimal representation.
The "optotype speed" is in degrees/second. "motion pattern" includes horizontal right to left, horizontal left to right, horizontal randomization, vertical up to down, vertical down to up, vertical randomization, and diagonal randomization.
The "interval time" is the time interval in seconds from the end of the movement of the previous optotype to the appearance of the next optotype.
"Pass criteria" is set in percentage and calculated in rounded fashion to indicate how many subjects are identified as passing a particular size subject during display of that size subject.
The "optotype size switching mode" is logic for testing the optotype size switching, and includes a fast mode and a standard mode. The quick mode needs to set the maximum number of optotypes to be displayed under each optotype size, and once the correct number of optotypes is identified by a tested person to reach the passing standard in the test process, the quick mode is immediately switched to the one-size-smaller optotype, and the like until the display number under the specific optotype size reaches the total number, the correct number identified by the tested person cannot reach the standard. The standard mode needs to set the maximum number of optotypes required to be displayed for each optotype size, the display number of the optotypes with each size reaches the set number in the test process, after the display is finished, if the number of the optotypes which are identified by the testee to be correct reaches the passing standard, the optotypes are switched to be one-size-smaller optotypes, and the like until the display number reaches the total number under the specific optotype size, and the number which is identified by the testee to be correct cannot reach the standard.
Clicking "save" saves the set parameters in the database. Clicking "reset" clears the parameters and can be reset entirely. Clicking "delete" deletes the module.
(5) Test mode selection: before the test starts, in the options behind the test mode at the upper right corner of the user interface, clicking on the corresponding gray circle to quickly select the preset test mode and perform the test, and re-setting parameters before each test is required. After clicking the gray circle, clicking "modify" may enter the test mode setting interface to modify the parameters. Clicking "delete" after clicking the gray circle may delete the current test pattern.
In a preferred embodiment, the multimode dynamic vision testing system of the present invention has a optotype display function; the sighting target display function is used for automatically displaying sighting targets with random opening directions of specific sizes, movement speeds, movement modes and time intervals in the pre-test and the formal test of each test module according to preset parameters, and can automatically switch the sighting target sizes and the test modules according to the preset parameters.
(1) Optotype morphology: the adopted optotype is letter E in the international standard visual acuity chart, the letter E is black, the contrast is 100%, the width of each line of the letter E is the same, and the gap width between the lines is the same as the width of the line. The E letter includes four openings, opening up, down, left and right.
(2) Optotype size: the size of the optotype is designed according to the visual angle principle of the international standard visual acuity chart, namely the size of the displayed optotype corresponds to the visual angle formed by the tested distance. The reciprocal θ 1 of the number entered by the small number expression is equal to 1/5 of the viewing angle θ 2 that the optotype forms at the test distance. When the size of the optotype is a, the view angle θ 2 =5/(60×a) ° formed by the optotype, the movement track length w of the optotype (the track length is the screen width if moving horizontally and the track length is the screen height if moving vertically) is based on the test distance L input before the test, and the program can automatically obtain the total pixel value P in the movement track direction of the screen, so that the pixel value p=2 (L/w) P tan ((θ 2 ×pi)/(2×180)) occupied by the optotype can be calculated according to the following company.
(3) Optotype movement pattern: the movement patterns of the optotype include horizontal right to left, horizontal left to right, horizontal random, vertical up to down, vertical down to up, vertical random, and diagonal random.
Horizontal right to left: the optotype appears from the middle of the leftmost side of the screen, moves horizontally to the middle of the rightmost side of the screen, and then disappears.
Horizontal left to right: the optotype appears from the middle of the rightmost side of the screen, moves horizontally to the middle of the leftmost side of the screen, and then disappears.
Horizontal randomization: the optotype randomly appears from the leftmost or rightmost side of the screen, moves horizontally to the middle of the opposite side, and then disappears.
Vertical up to down: the optotype appears from the uppermost middle of the screen, moves vertically to the lowermost middle of the screen, and then disappears.
Vertically down to up: the optotype appears from the lowest middle of the screen, moves vertically to the uppermost middle of the screen, and then disappears.
Vertical randomization: the optotype randomly appears from the uppermost or lowermost part of the screen, moves vertically to the middle of the opposite side, and then disappears.
Diagonal randomization: the optotype randomly appears from the upper right/lower left/upper left corner of the screen, moves to the corresponding corner along the diagonal of the screen, and then disappears.
(4) Speed of optotype movement: the speed of movement of the optotype is in units of view angle/second, i.e. the size of view angle per second of movement. In the implementation manner, when the program obtains that the refreshing frequency of the screen is f, under the condition of setting the speed v, each refreshing makes the visual angle of the optotype moving along the motion track be epsilon, wherein epsilon=v/f. According to the test distance L input before the test, the optotype motion track length w (if the optotype motion track length is the screen width; if the optotype motion track length is the screen height), the program can automatically obtain the total pixel value P of the screen motion track direction, so that the pixel value p=2 (L/w) P tan ((epsilon pi)/(2 x 180)) moving every time the screen is refreshed can be calculated according to the following formula.
(5) Optotype switching: in the process of pre-test and formal test, the size of the optotype is automatically switched in the test process according to the preset passing logic and the optotype size switching mode.
For the pre-test, the targets with the initial target size are sequentially displayed according to the preset interval time and the initial target size, and if the number of continuous identification errors of the testee is greater than or equal to the number set in the pass logic, the display module calls the targets which are greater than the current targets by one number, and so on. If the number of the tested person continuously identifying the correct number is more than or equal to the number set in the 'pass logic', the pre-test is passed.
For the formal test, the optotype having the "initial optotype size" is displayed at intervals of a preset interval time and initial optotype size. In the fast mode, when the number of the tested person judged to be correct reaches the number required to judge to be correct by the passing standard, the display module instantly calls the number of the targets smaller by one, and the like, until the number of the targets displayed reaches the total number required to be displayed for each set target, the tested person judges that the number of the tested person does not reach the passing standard, and the test is ended. In the standard mode, starting from the initial optotype size, after the number of the display optotypes reaches the set number, if the number of the correct optotypes identified by the testee reaches the passing standard, the display module calls the small-number optotype, and so on until the number of the display with a certain optotype size reaches the set number, the number of the correct optotypes identified by the testee cannot reach the standard, and at the moment, the test is ended.
In a preferred embodiment, the multi-mode dynamic vision testing system of the present invention further comprises a determiner, which is a keypad comprising four keys, up, down, left and right, connected to the host computer via bluetooth. In the testing process, the moving optotype displayed in the tested observation screen starts to move from the current optotype to the next optotype, the opening direction of the optotype needs to be input into the judging device by the tested person, and the program automatically compares the source direction of the judging device with the opening direction of the actually displayed optotype, so that the judgment of the opening direction of the display optotype by the tested person is correct. If the testee does not press any judging key before the next visual target appears, automatically identifying that the testee judges the judgment is wrong; and displaying the optotype, switching the optotype or ending the test according to the number of judging the correct errors and the preset 'through logic'.
In a preferred embodiment, the multimode dynamic vision testing system of the present invention has a result output function:
(1) And (3) outputting results: in the front view testing process, after each testing module is finished, the testing result is automatically displayed in the screen, as shown in fig. 7. The results are displayed in a fractional representation of the optotype, including the minimum optotype that the subject can reach "pass criteria", and the number of optotypes that are one smaller than the minimum optotype that the subject can reach "pass criteria", are able to identify the correct number, connected by a plus sign.
(2) Results show that: the results of each test and the original data of the test are automatically stored in a database. The time, test mode, eye and test result of each test are displayed in the table in the lower right corner of the user interface, and the test result of each module is displayed in turn. The original data of the test is automatically stored in a database, and the original data comprises the test mode parameters, the opening direction of the display optotype and the determined opening direction in the whole test process, and can be exported to a local folder.
In a preferred embodiment, the multi-mode dynamic vision testing system of the present invention has a database function, that is, various inspection related data related to the multi-mode dynamic vision testing system of the present invention is stored in a database of a server, so that retrieval and backtracking can be performed. The data contained therein are:
(1) Patient basic information tables, including patient name, date of birth, and medical record number, are used as keywords to index patients.
(2) The completed test table, indexed by the test code generated by the system based on the time stamp, contains the patient's basic information of the test, the time the test was completed, the test pattern record, the test eye and the test results.
(3) The sighting target data table takes the sighting target type as an index and comprises sighting targets with various sizes, and the sighting target data table corresponds to the calculation relation of the minimum resolution angle, the test distance, the screen size and the pixel value.
(4) The test mode data table takes a test code generated based on the time stamp as an index and comprises a test name, test conditions, module interval time and information of each module.
(5) And the test module data table comprises information such as module codes, pre-test setting parameters, formal test setting parameters and the like generated based on the time stamp.
(6) The test result data table takes the test code generated based on the time stamp as an index, comprises patient basic information, a test name, a module code, a test eye number and a test original record (comprising the size of a visual target, a movement mode, the movement mode and judgment input of a tested person displayed each time), and can generate excel and export the excel to the local.
In a preferred embodiment, the test apparatus employed in the multi-mode dynamic vision testing system of the present invention includes a test computer, a screen and a determiner. The test computer is a win10 system, the screen is an IPS screen, the refresh frequency is 120hz-500hz, and the response time is 1ms or less. The screen is connected with the test computer through a DP connecting wire. The determiner is connected with the computer through Bluetooth.
The invention also provides a dynamic vision testing method of the multi-mode dynamic vision testing system, which comprises the following steps:
s1, introducing a test flow: the distance between the tested person and the screen is adjusted to be in accordance with the testing distance (such as 3 meters); adjusting the seat height of the tested person so that the eyes of the tested person are positioned at the central level of the screen;
S2, entering a user interface, as shown in FIG. 2;
The upper left part is patient information, a new test patient can be added by clicking the new test patient, the name, the date of birth and the medical record number of the patient are input, and the input patient information can be saved by clicking the test patient. Click modification may modify the basic information of the patient who has completed the test. Click searches may search for patient results for which the test has been completed according to information.
The lower left shows information for all patients who have completed the test. Clicking on one of the patients (graying out) then clicking on "modify" to modify the information corresponding to that patient at the top left.
The lower right panel is the previous tests performed by the patient, including test date, test eye and results.
The upper right can quickly select the test mode to be performed, for example, click on a gray circle on the left side of the test 1, or click on "new" to perform custom setting of the test mode; after the selection is completed, clicking to start the test and entering the test. Clicking "modify" may modify the current test pattern. Clicking "delete" may delete the current test pattern.
S3, entering a test mode setting interface:
click "Add" test mode setup interface, FIG. 3.
(1) The user-defined test basic information is input into the test information, wherein the test basic information comprises a test name (such as 'post-operation test'), a test condition (such as a test distance of 3 meters, a test screen width of 53cm and a test screen height of 40 cm), and a test module interval time (such as 60 seconds), and the current test information can be stored by clicking 'save'.
(2) Clicking the module plus to increase the test modules, so that a plurality of test modules can be increased, and each test module is sequentially displayed in the test process
(3) In the setting of the test module, pre-test and formal test parameters are set (the pre-test can help a testee to know the movement mode of a test optotype, so that the accuracy of the test is improved).
(4) If yes, the pre-test parameters are set continuously. The pre-test initial optotype size (e.g., 0.5), optotype speed (e.g., 20 degrees/sec), movement pattern (e.g., horizontal left to right), optotype interval time (e.g., 2 sec), pass test logic (e.g., correct 5 pass tests in succession, incorrect 2 switch to the large one-number optotype), pre-test-front test interval (e.g., 10 sec).
(5) The setting of the formal test includes an initial optotype size (e.g., 0.5), an optotype speed (e.g., 20 degrees/sec), a movement pattern (e.g., horizontal left to right), an optotype interval time (e.g., 2 sec), a passing criterion (e.g., 50%), and a passing logic (e.g., set to "quick mode, and if the correct number is recognized out of 8 optotypes, it becomes one-number smaller optotype until the test is completed").
(6) Clicking 'save' to save the set parameters; the reset may also be clicked, resetting all parameters. Clicking "back" returns to the original interface.
S4, starting a test:
(1) Clicking on "start test" in the initial interface to enter the test, as in FIG. 5, clicking on "space" to start pre-test;
(2) In the pre-test process, according to set parameters including the size of the optotype, the speed of the optotype, the movement mode and the time interval, displaying the optotype with random opening direction, judging the opening direction of the optotype by the testee in the time period from the beginning of the movement of the optotype to the occurrence of the next optotype, inputting the judgment of the testee into a judging device by the testee, for example, judging that the opening is up by the testee, and pressing an up direction key by the testee. After the testee continuously judges the opening directions of the correct 5 optotypes, the pre-test is finished.
(3) After passing the pre-test, the method displays FIG. 6, waits for 10 seconds or clicks on a "space" to begin the formal test;
(4) In the process of formal test, displaying a visual target with random opening direction according to set parameters including initial visual target size, visual target speed, movement mode and time interval, judging the opening direction of the visual target by a tested person in a time period from the beginning of movement of the visual target to the occurrence of the next visual target, inputting the judgment of the tested person by an inspector, for example, judging that the opening is up by the tested person, and pressing an up direction key by the inspector; the system determines when the test can be ended when the test can be switched to a small one-size visual target according to the set visual target size switching mode. If the initial size is 0.5, the index size switching mode is "if the identification correct number of the 8 indexes reaches the standard, the index is changed into the smaller index of one number, until the test is finished", then 8 indexes with the size of 0.5 are displayed at most, if the tested number is judged to be correct to be full of 5 in the display process, the index is switched to the smaller index of one number at any time, namely 0.625, and the process is repeated until the judgment correct number of the 8 indexes is less than 5. At this point the test ends.
(5) The results show that:
after the testing of one module is finished, the module is shown as figure 7, and clicking on a space is continued to the next module, and if the next module is not present, the module is shown as clicking on the space to finish the testing;
s5, calculating a test result: the results are displayed in a decimal representation of the optotype, including the minimum optotype that the subject can reach "pass", and the number of optotypes that are one sign smaller than the minimum optotype that the subject can reach "pass", which are connected by a plus sign, can be identified as correct.
In this example, the test passing logic is "if the correct 5 out of 8 optotypes are judged, the optotype becomes smaller one number", and if the correct 6 (more than or equal to 5/8) optotypes are recognized by 0.8 optotypes of testees in the test, the correct 2 are recognized by 1.0 optotypes, the result is 0.8+2.
The key points of the invention include:
(1) The dynamic vision testing system of the present invention is capable of displaying optotypes having multiple modes of motion, including horizontal motion, vertical motion, and diagonal motion.
(2) The dynamic vision test system of the invention can preset corresponding test modes according to test requirements, including the size, the speed, the movement mode and the passing logic of the optotype used in the pre-test and the formal test, and can quickly select the required test mode by one key before the test, wherein the test mode comprises preset parameters without resetting the parameters each time.
(3) The dynamic vision testing system can support multi-module combined testing, and each module can set independent testing parameters, including initial optotype size, optotype movement mode, optotype movement speed, optotype display interval, testing logic and the like. In the testing process, the tested person can complete multiple dynamic vision tests with different parameters at one time without repeatedly exiting to adjust the testing parameters.
(4) The dynamic vision testing system can adjust pre-test parameters, including the size of the optotype, the movement speed of the optotype, the movement mode of the optotype, the display interval time, the testing logic and the like.
(5) The dynamic vision testing system comprises a user interface which is easy to interact, is convenient for increasing, modifying, searching and storing the information of the tested person according to the keywords, and can display the testing mode and the testing result of each detection of the tested person.
(6) The dynamic vision testing system can automatically display the testing result after testing and store the testing result in the server, and can inquire the result of each examination of the patient in the user interface, thereby being convenient for statistics and tracing.
Compared with the prior art, the invention can preset the tested parameters according to the test requirement, including the size of the sighting target, the speed of the sighting target, the movement mode and the passing logic, and select a key before the test, thereby being convenient and quick; meanwhile, the parameter setting supports multi-module combination, namely, combination tests of multiple movement speeds and movement modes can be sequentially completed in one test, and parameter setting is not required to be carried out by repeatedly returning to a parameter setting interface; meanwhile, personalized pre-test setting is added in parameter setting, so that the problem that no independent pre-test module exists in the prior inspection equipment is solved.
The invention develops a user interface and a database which are easier to interact, is convenient for the input and the retrieval of the information of the testee, and checks the checking result and traces the source.
The foregoing describes preferred embodiments of the present invention, but is not intended to limit the invention thereto. Modifications and variations to the embodiments disclosed herein may be made by those skilled in the art without departing from the scope and spirit of the invention.
Claims (10)
1. The multi-mode dynamic vision detection system is characterized by comprising a host, an information acquisition unit, a display unit and a database; the host is provided with a data processing unit, a data storage and retrieval module, a display module and a judgment module;
the information acquisition unit is used for collecting information input by an inspector and judging information of a tested person;
The display unit is used for displaying a user interface, a sighting target setting interface, a test interface and a result display interface;
The database is used for storing the information and test information of the tested person, including a tested information table, a visual target information table and a finished test table, and can be searched and called by using the data processing unit of the host;
the data processing unit is used for receiving the information of the tested person collected by the information collecting unit and storing the information in a tested information table in the database through the data storage and retrieval module;
the data in the tested information table in the database can be accessed through the data storage and retrieval module;
Displaying the information of the tested person in a user interface of a display unit through a display module;
the data processing unit of the host has a sighting mark setting function, can accept setting parameters input by the information acquisition unit, comprises parameters of pre-test and formal test in each test module in each test mode, and displays the setting parameters in the display unit in the test process by the display module;
The judging module is used for comparing the opening direction of the visual target actually displayed with the judging opening direction input by the testee in the test process so as to judge whether the input by the testee is correct or incorrect; after the test is finished, the test result is displayed in a result display interface of the display unit through the display module, so that a result output function is realized.
2. The multi-mode dynamic vision testing system of claim 1, wherein the information input by the examiner includes basic information of the examinee and optotype setting parameters.
3. The multi-mode dynamic vision testing system of claim 1, wherein the basic information of the subject includes the subject's name, medical record number, and birth year and month.
4. The multi-mode dynamic vision testing system of claim 1, wherein the decision information of the subject is that the subject decides based on the opening direction of the moving optotype to be seen, and inputs one of the up, down, left or right of the decision into the decision maker.
5. The multi-mode dynamic vision testing system of claim 1, wherein the set parameters input through the information acquisition unit include a size of a visual target, a movement speed, and a movement mode.
6. The multi-mode dynamic vision testing system of claim 1, wherein the visual target information table contains basic information of visual targets required for testing, and the visual targets are associated with the testing distance and the size of the display unit; the test information table contains basic information of the test person.
7. The multi-mode dynamic vision testing system of claim 1, wherein the completed test chart contains test module information under each test, optotype parameters of each test module, and test result data of each test module, all associated with the information of the subject.
8. The system of claim 1, wherein the system is capable of presetting a respective custom test mode according to test requirements, each test mode comprising a plurality of test modules, each test module comprising a pre-test and a formal test, the various parameters of the test being capable of being pre-determined for quick selection prior to testing.
9. The multi-mode dynamic vision testing system of claim 8, wherein the "motion mode" in the pre-test includes horizontal right to left, horizontal left to right, horizontal random, vertical up to down, vertical down to up, vertical random and diagonal random; the "interval time" is the time interval from the end of the previous optotype movement to the appearance of the next optotype, in seconds; the "pass logic" is a condition for passing the pre-test, and specifically includes the number of the optotypes which are required to be continuously judged to be correct by the pre-test and the number of the optotypes which are required to be continuously recognized to be wrong by switching to the large-size optotype.
10. The multi-mode dynamic vision testing system of claim 8, wherein the "movement modes" in the formal test include horizontal right to left, horizontal left to right, horizontal random, vertical up to down, vertical down to up, vertical random and diagonal random; the "interval time" is the time interval from the end of the previous optotype movement to the appearance of the next optotype, in seconds; the "pass criteria" is set in percentage and calculated in rounded fashion to indicate how many subjects are identified as passing a particular size subject during display of that particular size subject.
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