CN116725472B - Color dynamic vision testing system and method - Google Patents
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Abstract
The invention relates to a color dynamic vision testing system and method, the system includes the color dynamic vision testing equipment, the visual target display unit of the color dynamic vision testing and the output unit of the color dynamic vision result, the testing equipment includes the computer, screen and judgement device for testing, the key information pressed by the judgement device will be transmitted to the computer, the computer judges the correct and incorrect automatically; the computer is used for the user to set basic parameters, quickly set, test color setting and exercise setting, and run the color dynamic vision testing software to test the color dynamic vision; the color dynamic vision test optotype display unit is used for controlling the color dynamic vision test optotype to display on the screen along the set movement mode according to the preset parameters, and the color dynamic vision result output unit is used for automatically recording the whole process of the color dynamic vision test, automatically outputting the test result after the test is finished, and simultaneously storing the original data in the local file.
Description
Technical Field
The invention relates to the technical field of dynamic vision testing, in particular to a color dynamic vision testing system and method.
Background
Dynamic vision refers to the ability of a person to resolve moving object details from a visual perspective. Dynamic vision is vital to everyday life, including sports, driving, and the like. Good dynamic vision is critical to quality of life and exercise safety. Therefore, in clinical practice, evaluation of simple static vision is far from sufficient, and dynamic vision evaluation is also required to be applied to understand the living ability of the patient.
The evaluation method of dynamic vision comprises a kinesthetic behavior test, static dynamic vision of the optotype and dynamic vision of the optotype. The kinesthesia behavior test is mainly used for psychological test, and is used for testing the perception of the movement. Static dynamic vision of the optotype is mainly used in the otorhinolaryngology department to evaluate the vestibular function of the subject. However, the most clinically used is the dynamic vision test of the movement of the optotype (hereinafter referred to as dynamic vision), which refers to the test procedure in which the head of the subject is fixed while observing the standard movement optotype located at a distance in front of it, and the details of the movement optotype are distinguished. The system capable of performing dynamic vision testing developed at present mainly comprises a system for performing dynamic vision testing based on a motor driving an entity vision testing board, a testing system based on portable wearable equipment and a testing system based on software and a screen. The method of realizing adjustable dynamic optotype display by utilizing software programming and then projecting the optotype into a screen by a certain method is widely applied in clinic. The novel dynamic vision detection system developed by the applicant in the earlier stage is the mode, is simple and easy to operate and convenient to popularize, can conveniently adjust the test distance, the size of the sighting mark and the movement speed in the test process, and can meet clinical requirements to a certain extent.
However, the dynamic vision assessment system applied at present is similar to the static vision assessment, and only can display a black visual target and a white background, however, a large number of visual signals contacted by people in daily life have various different colors. Only assessing dynamic vision of a white background/black optotype has certain limitations. Meanwhile, currently, in clinic, color vision inspection comprises a false color chart, a Farnsworth15 color code test inspection, an FM-100 color inspection and the like, and all the inspection is performed by adopting a static optotype. After light enters the eye, photoreceptors receive light signals and integrate at ganglion cells to deliver vision into the brain. Different ganglion cells tend to transmit different signals, with P ganglion cells transmitting primarily high spatial frequency signals, as well as color vision signals, and through the V1 region of the visual cortex to the V4 region. Whereas M ganglion cells transmit primarily motor visual signals and pass through the V1 region of the visual cortex to the MT/V5 region. However, studies have shown that the visual pathways associated with P ganglion cells and M ganglion cells are not independent of each other in the transmission of visual signals, and that P ganglion cells also transmit a portion of the high spatial frequency signal, i.e., the motor visual signal, while P ganglion cells communicate with the MT/V5 region, thereby integrating a portion of the color vision signal. The prior literature shows that the visual evoked potentials induced by sinusoidal stripe motion optotypes with different colors have different latency periods and amplitudes; meanwhile, the motion adaptability visual potential caused by the sinusoidal stripe motion optotype with different colors is also different. Thus, at the signal path level, color vision and dynamic vision have interactions. Therefore, it is of great clinical importance to develop detection systems capable of detecting different color dynamic vision.
The disadvantages of the dynamic vision test in the prior art mainly include: only black moving optotypes and white backgrounds can be displayed, and color dynamic vision test cannot be performed; the color motion optotype/background and test system developed by applicant team for stimulation of different photoreceptor cells only provides a combination pattern of specific colors and backgrounds for three photoreceptor cells (cone, rod and ipRGC cells), with a relatively fixed match of optotype colors and background colors.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide a color dynamic vision testing system and method, and the technical problems to be solved at least include how to provide a dynamic vision testing system capable of displaying a moving optotype with a specific color and a moving background of the optotype, and the dynamic vision testing system can set various optotype colors and background colors at will to match, so as to perform color dynamic vision testing more comprehensively.
In order to achieve the above object, the present invention provides a color dynamic vision testing system, which comprises a color dynamic vision testing device, a color dynamic vision testing optotype display unit and a color dynamic vision result output unit, wherein the color dynamic vision testing device comprises a computer for testing, a screen and a determiner, wherein the screen is connected with the computer and is used for displaying a quick setting interface, a test color setting interface, a motion setting interface, a color dynamic vision testing optotype, a pre-training interface and a result output interface; the judging device is connected with the computer and the screen, and the key information which is tested to be pressed on the judging device is transmitted to the computer, so that the computer can automatically judge whether the key information is correct or incorrect; the computer is used for a user to set basic parameters, quickly set, test colors and exercise, and operates the color dynamic vision testing software to test the color dynamic vision; the color dynamic vision test optotype display unit is used for controlling the color dynamic vision test optotype to display on the screen along the set movement mode according to the preset parameters, and the color dynamic vision result output unit is used for automatically recording the whole process of the color dynamic vision test, automatically outputting the test result after the test is finished, and simultaneously storing the original data in the local file.
Preferably, the preset parameters include background color, target size, target speed and movement pattern.
Preferably, the color dynamic vision test optotype displayed on the screen is capitalized letter E with the opening facing up, down, left or right, wherein the optotype E adopts letters in the international standard visual chart, the width of each line of the letter E is the same, and the width of the gap between the lines is the same as the width of the line.
Preferably, the size of the optotype is input according to a small number expression method according to a static vision testing habit, and the color dynamic vision testing optotype display unit automatically calculates the actual optotype size to be displayed on the screen according to the testing distance, the screen width, the screen pixels and the input optotype size.
Preferably, the target speed is input in units of visual angle/second; the color dynamic vision test optotype display unit automatically calculates the pixel value which needs to move on the screen every second according to the test distance, the screen width, the screen pixels and the input optotype speed.
Preferably, the background color is coded by RGB or HSV, is set before the test, and is always displayed in the test process.
Preferably, the optotype color is coded by adopting RGB or HSV, is set before the test, and enables the optotype to be always positioned above the background to move in the process of the test, and the color of the optotype is not overlapped with the color of the background.
Preferably, the motion mode comprises horizontal motion, vertical motion, oblique motion and random motion, and is set before the test starts; wherein the horizontal movement appears from the middle of the left edge or the right edge of the screen, moves to the other side along the horizontal line, and then disappears; the vertical movement occurs from the middle of the upper edge or the lower edge of the screen, moves to the other side along the vertical line, and then disappears; diagonal movement is from one of the four corners of the screen, diagonally to the other corner; the random motion is a random occurrence of horizontal motion, vertical motion or oblique motion.
Preferably, the test result automatically output by the color dynamic vision result output unit comprises background color, optotype movement speed, movement mode and dynamic vision; the original data comprise background color, optotype moving speed, moving mode, optotype opening direction and optotype opening direction of tested response when displaying each optotype in the test process.
Preferably, the test computer is further connected with a keyboard, and when a specific key on the keyboard is pressed, the corresponding optotype moves along a set movement mode and disappears after movement; pressing a specific key on the keyboard again after the optotype disappears enables the corresponding optotype to be displayed again, whereas pressing a specific key on the keyboard does not react when there is movement of the optotype on the screen.
The invention also provides a dynamic stereoscopic vision detection method, which comprises the following steps:
s1, equipment connection and basic parameter setting: opening a computer and a screen and connecting, running color dynamic vision testing software on the computer, jumping to a basic parameter setting interface, and inputting a testing distance and a testing screen width;
s2, adjusting the distance and the height: adjusting the position of a tested seat according to the required test distance, and adjusting the height of the seat according to the position of the screen so that the tested sight looks at the central position of the screen in a head-up mode;
s3, setting test parameters: entering a test parameter setting interface, and performing shortcut key setting, color setting and motion setting;
s4, pre-training: clicking to determine to enter a pre-training interface after the color setting and the movement setting are completed, wherein a test parameter column is arranged above the pre-training interface, and the background color, the optotype movement mode, the optotype movement speed and the optotype size in the current test state are displayed in the test parameter column; wherein the background color and the optotype color are displayed in a set coding form, including RGB, HSV and standard colors; the movement speed of the optotype is displayed in units of degrees/second, and the size of the optotype is displayed as a small number representation method; clicking the black triangle at the upper right corner can hide the test parameter column; after hiding, clicking again to redisplay; default hiding test parameter fields in the test process; clicking to start pre-training starts pre-training, clicking to skip pre-training skips pre-training to start formal test; the pre-training background color, the optotype color and the optotype moving speed are the same as those of the formal test, wherein the optotype size is the initial optotype size of the formal test; pressing keys with corresponding sighting mark openings facing up, down, left or right in the keyboard, and displaying letters E with corresponding openings facing different directions; or pressing a key correspondingly displaying the optotype with the random opening direction, and displaying the optotype with the random opening direction in the screen; guiding letters appearing in the tested observation screen, pressing keys in corresponding directions in the judging device according to the opening directions of the letters, and automatically judging whether the tested judgment is correct or not by a computer program; pre-training 10 optotypes until the tested can continuously and correctly identify 5 or more optotypes, and ending the pre-training;
S5, formal test: pressing a shortcut key corresponding to the opening direction of the sighting target to be displayed, or pressing a shortcut key capable of displaying the sighting target with random opening direction, so that a patient can recognize the opening direction of a moving letter appearing in a screen, and pressing a judging key; the decision logic adopts a standard static vision examination method; at most 5 optotypes of each size are displayed, and if the patient can identify 3 optotypes of the current size, the optotype is switched to an optotype which is one number smaller than the current optotype; switching the size of the optotype by using the shortcut key for switching the size of the optotype; if the patient recognizes that the number of the current size optotypes is smaller than 3, switching to an optotype which is larger than the current optotype by one; finally obtaining at least 3 minimum optotypes which can be identified by the test, wherein the size of each optotype is T1, the size of each optotype which is larger than the minimum optotype is T2, and the number N which can be identified by the size; the dynamic vision size tested at this speed is-lgT 2-N0.02;
after testing the color dynamic vision at the speed, switching the movement speed by using the shortcut key for switching the movement speed of the optotype, thereby testing the color dynamic vision at different speeds;
after the test is finished, the test entering result output interface can be finished by pressing the carriage return; pressing the ESC exits the test.
Compared with the prior art, the invention has the beneficial effects that:
1) The dynamic vision testing system in the prior art can only display black moving optotypes and has limited application. The color dynamic vision testing system can set the color of the display optotype before testing, thereby testing the dynamic vision applying different color optotypes. By setting the color of the display optotype before the test, the dynamic optotype with the corresponding color is displayed during the test.
2) The dynamic vision testing system in the prior art can only display white background and has limited application. The color dynamic vision testing system sets the color of the displayed test background before testing, so that the test background is the dynamic vision with different colors.
3) The conventional sports optotype and test system for stimulating different photoreceptor cells only provides optotypes with specific colors and backgrounds for three photoreceptor cells (cone cells, rod cells and ipRGC cells) for testing, the matching of the optotypes with the colors of the backgrounds is relatively fixed, and the system has certain limitation.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate and do not limit the invention.
FIG. 1 is a schematic diagram of a quick setup interface for a color dynamic vision testing system according to the present invention.
FIG. 2 is a schematic diagram of a test color setting interface of the color dynamic vision testing system of the present invention.
FIG. 3 is a schematic diagram of a motion setup interface for a color dynamic vision testing system according to the present invention.
FIG. 4 is a schematic diagram of a pre-training interface of a color dynamic vision testing system in accordance with the present invention.
FIG. 5 is a schematic diagram of a result output interface of a color dynamic vision testing system in accordance with the present invention.
Detailed Description
The present invention is described in more detail below to facilitate an understanding of the present invention.
In view of the various problems existing in the prior art, the invention provides a color dynamic vision detection system which can be widely applied in the ophthalmic clinical diagnosis and treatment process and is convenient to operate. Compared with the dynamic vision testing system developed before, the invention is redesigned, so that the color dynamic vision testing system can display the sports optotype with specific color and simultaneously can display the background with specific color, thereby being capable of performing color dynamic vision testing.
In order to achieve the above object, the present invention provides a color dynamic vision testing system, which comprises a color dynamic vision testing optotype display unit and a color dynamic vision result output unit.
The color dynamic vision test optotype display unit can realize the corresponding optotype along the set movement mode according to preset parameters including background color, optotype size, optotype speed and movement mode when a specific key is pressed, and disappears after movement. Pressing a specific cursor key again after the cursor has disappeared can display the corresponding cursor again, whereas pressing the cursor key does not react when there is a cursor movement on the screen.
(1) The moving optotype is shown as capital letter E with the opening facing up/down/left/right, wherein the optotype E is a letter in the international standard visual chart, i.e. 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.
(2) The size of the sighting target is input according to a static vision detection habit and a small number expression method, and the actual sighting target size required to be displayed on the screen is automatically calculated according to the test distance, the screen width, the screen pixels and the input sighting target size.
(3) Wherein the optotype speed is input in units of view angle/second. According to the test distance, the screen width, the screen pixels and the input motion speed, automatically calculating the pixel value which needs to be moved on the screen every second.
(4) The background color is coded by adopting RGB or HSV, is set before the test and is always displayed in the test process.
(5) The method comprises the steps of setting the color of a visual target by adopting RGB or HSV, and enabling the visual target to be always positioned on a background to move in the testing process, wherein the color of the visual target is not overlapped with the color of the background.
(6) Wherein the movement pattern includes horizontal movement, vertical movement, diagonal movement, and random movement, and is set before the start of the test. Wherein the horizontal movement appears from the middle of the left/right edges of the screen, moves to the other side along the horizontal line, and disappears; the vertical movement appears from the middle of the upper/lower edges of the screen, moves to the other side along the vertical line, and disappears; the diagonal movement is from four corners of the screen, diagonally to the other corner. The random motion is random occurrence of the three motion modes.
The color dynamic vision result output unit is used for automatically recording the whole process of color dynamic vision test. After the test is completed, the test result is automatically output, and meanwhile, the original data is stored in a local file. The resulting output includes background color, optotype movement speed, movement pattern and dynamic vision. The original data comprises background color, optotype moving speed, moving mode, optotype opening direction and optotype opening direction of tested response when displaying each optotype in the test process. The automatic storage function is convenient for tracing the testing process, so that the accuracy of data is ensured.
The color dynamic vision testing process comprises the following steps:
the test equipment comprises a test computer, a screen and a judging device: the color dynamic vision testing system of the invention requires to support the DP protocol for the test computer. The screen requires refresh frequency to be above 120Hz and response time to be below 1ms, so that the moving optotype can be well displayed; the color gamut is 100% sRGB and above, the color number is 8bit and above, and the color difference delta E is less than or equal to 5, so that different colors can be accurately displayed. The determiner is a keypad including up, down, left, and right direction keys for determining an opening direction of the display optotype to be tested.
The measuring process of the color dynamic vision testing system comprises the following steps:
(1) Device connection and basic parameter settings: and opening the computer and the screen, connecting, running color dynamic vision testing software on the computer, jumping to a basic parameter setting interface, and inputting a testing distance and a testing screen width.
(2) Distance and height adjustment: and adjusting the position of the tested seat according to the required test distance, and adjusting the height of the seat according to the position of the screen so that the tested sight is in a head-up state at the central position of the screen.
(3) And (3) setting test parameters: entering a test parameter setting interface, including shortcut key setting, color setting and motion setting.
Fig. 1 is a quick setting interface including a target direction, target speed switching, and target size switching quick setting. The sighting target direction is set to be different shortcut keys respectively after the sighting target with the opening facing up/down/left/right directions, so that the corresponding sighting target is displayed by pressing the corresponding shortcut key in the testing process. A random opening visual target display shortcut key is also required to be set, so that the shortcut key is pressed down to display the visual target with the random opening direction in the test process. The speed switching of the optotype is quickly set as a shortcut key for setting up/down the movement speed of the optotype and the speed of each increase/decrease, so that pressing the corresponding shortcut key in the test can quickly switch the movement speed of the optotype at set intervals. The quick setting of the size of the visual target is that the quick key setting for setting the size of the visual target to be increased/decreased is realized, a series of visual targets with the size being built in the system is set according to the size of the international standard visual chart.
Wherein fig. 2 is a test color setting interface. The colors to be set include background color and optotype color. The setting of the background color and the optotype color can be selectively performed in one of two modes of RGB or HSV. Clicking gray origin before RGB or HSV confirms selecting RGB or HSV color coding mode, and sequentially inputting three parameters of required color in a frame after RGB or HSV parameters. In addition to the two color coding modes of RGB and HSV, the right-most standard color can be clicked, and the standard color can be selected in the drop-down menu, wherein the standard color comprises common black, white, red, green, blue, yellow and the like.
After setting the background color and the sighting target color, clicking the preview button below can preview the background and sighting target condition after the selected color. Clicking "clear" can reset the color setting, clicking "ok" completes the color setting.
Fig. 3 is a motion setting interface including a motion mode setting, an initial motion speed setting, and an initial optotype size setting. Among which alternative modes of motion include horizontal motion, vertical motion, diagonal motion, and random motion. Clicking the gray button before the starting point of the movement to select the required movement mode. Wherein, the horizontal movement, the vertical movement and the oblique movement can all select a random starting point mode, namely, the starting point of the visual target in the test process is a random one of 2-4 starting points which can be selected in the movement mode. And selecting a random motion mode, namely, selecting the motion mode of each sighting target in the test process as random one of horizontal motion, vertical motion and oblique motion. The initial movement speed is set, and the required initial optotype movement speed can be input in the corresponding box, wherein the unit is degree/second. The initial optotype size is set, the required initial optotype size can be input in the corresponding box, and the optotype size is expressed by a small number representation method. Clicking on "clear" below can reset, clicking on "ok" completes the motion setup.
(4) Pre-training: click determination after completion of color setting and motion setting enters the pre-training interface as shown in fig. 4. Above the pre-training interface is a test parameter column, displaying background color, optotype movement mode, movement speed and optotype size under the current test state. Wherein the background color and the optotype color are displayed in a set coding form including RGB, HSV and standard colors. The movement speed of the optotype is displayed in degrees/second, and the size of the optotype is displayed in a decimal representation. Clicking on the black triangle in the upper right corner may hide the test parameters bar. After hiding, clicking again can redisplay. The test parameter fields are hidden by default during testing.
The pre-training is needed before the formal test starts, so that the patient can know the test process and the movement mode conveniently, the learning effect of the test is reduced, and the accuracy and the repeatability of the test are improved. Clicking on the start pre-training may begin pre-training, clicking on the skip pre-training skips the pre-training and begins the formal test. The pre-trained background color, the optotype color and the optotype movement speed are the same as those of the front vision test, wherein the optotype size is the initial optotype size of the formal test. Pressing keys on the keyboard that correspond to the up/down/left/right of the optotype opening, e.g. 1/2/3/4 of the number keys, may display the letter E with the corresponding opening facing in a different direction. A button, such as the number key 5, corresponding to the display of the optotype with the random opening direction may be pressed, and the optotype with the random opening direction is displayed in the screen. The patient is guided to observe letters appearing in the screen, the keys in the corresponding directions in the judging device are pressed according to the opening directions of the letters, and the computer program automatically judges whether the tested judgment is correct or not. Pre-training about 10 optotypes is completed until the test can more easily and continuously and correctly identify 5 or more optotypes.
(6) Formally testing: pressing a shortcut key corresponding to the opening direction of the sighting target to be displayed, or pressing a shortcut key capable of displaying the sighting target with random opening direction, enabling a patient to recognize the opening direction of a moving letter appearing in a screen, and pressing a judging key. The decision logic takes the form of a standard static vision test. Each size of optotype displays a maximum of 5, and if the patient is able to identify 3 of the current size of optotypes, then switch to an one-size smaller optotype than the current one. And switching the size of the sighting target by using the sighting target size switching shortcut key. If the patient recognizes that the number of current size optotypes is less than 3, switching to an optotype which is one number larger than the current optotype. Finally, the size of at least 3 minimum optotypes which can be identified by the test is T1, the size of the optotype which is larger than the minimum optotype is T2, and the number N which can be identified by the size is obtained. The dynamic vision size tested at this speed was-lgT 2-N0.02.
After testing the color dynamic vision at the speed, the movement speed is switched by using the cursor movement speed switching shortcut key, so that the color dynamic vision at different speeds is tested.
After the test is completed, the test entering result output interface can be finished by pressing the carriage return, as shown in fig. 5. Pressing the ESC exits the test.
On the basis of the specific embodiment, the invention provides a color dynamic vision testing system, which comprises color dynamic vision testing equipment, a color dynamic vision testing optotype display unit and a color dynamic vision result output unit, wherein the color dynamic vision testing equipment comprises a computer for testing, a screen and a judging device, wherein the screen is connected with the computer and is used for displaying a quick setting interface, a test color setting interface, a motion setting interface, a color dynamic vision testing optotype, a pre-training interface and a result output interface; the judging device is connected with the computer and the screen, and the key information which is tested to be pressed on the judging device is transmitted to the computer, so that the computer can automatically judge whether the key information is correct or incorrect; the computer is used for a user to set basic parameters, quickly set, test colors and exercise, and operates the color dynamic vision testing software to test the color dynamic vision; the color dynamic vision test optotype display unit is used for controlling the color dynamic vision test optotype to display on the screen along the set movement mode according to the preset parameters, and the color dynamic vision result output unit is used for automatically recording the whole process of the color dynamic vision test, automatically outputting the test result after the test is finished, and simultaneously storing the original data in the local file.
Preferably, the preset parameters include background color, target size, target speed and movement pattern.
Preferably, the color dynamic vision test optotype displayed on the screen is capitalized letter E with the opening facing up, down, left or right, wherein the optotype E adopts letters in the international standard visual chart, the width of each line of the letter E is the same, and the width of the gap between the lines is the same as the width of the line.
Preferably, the size of the optotype is input according to a small number expression method according to a static vision testing habit, and the color dynamic vision testing optotype display unit automatically calculates the actual optotype size to be displayed on the screen according to the testing distance, the screen width, the screen pixels and the input optotype size.
Preferably, the target speed is input in units of degrees/second; the color dynamic vision test optotype display unit automatically calculates the pixel value which needs to move on the screen every second according to the test distance, the screen width, the screen pixels and the input optotype speed.
Preferably, the background color is coded by RGB or HSV, is set before the test, and is always displayed in the test process.
Preferably, the optotype color is coded by adopting RGB or HSV, is set before the test, and enables the optotype to be always positioned above the background to move in the process of the test, and the color of the optotype is not overlapped with the color of the background.
Preferably, the motion mode comprises horizontal motion, vertical motion, oblique motion and random motion, and is set before the test starts; wherein the horizontal movement appears from the middle of the left edge or the right edge of the screen, moves to the other side along the horizontal line, and then disappears; the vertical movement occurs from the middle of the upper edge or the lower edge of the screen, moves to the other side along the vertical line, and then disappears; diagonal movement is from one of the four corners of the screen, diagonally to the other corner; the random motion is a random occurrence of horizontal motion, vertical motion or oblique motion.
Preferably, the test result automatically output by the color dynamic vision result output unit comprises background color, optotype movement speed, movement mode and dynamic vision; the original data comprise background color, optotype moving speed, moving mode, optotype opening direction and optotype opening direction of tested response when displaying each optotype in the test process.
Preferably, the test computer is further connected with a keyboard, and when a specific key on the keyboard is pressed, the corresponding optotype moves along a set movement mode and disappears after movement; pressing a specific key on the keyboard again after the optotype disappears enables the corresponding optotype to be displayed again, whereas pressing a specific key on the keyboard does not react when there is movement of the optotype on the screen.
Preferably, the quick setting interface is used for realizing quick setting of the direction of the optotype, quick setting of the speed switching of the optotype and quick setting of the size switching of the optotype; wherein the sighting target direction is rapidly set for setting different shortcut keys after the sighting target with the opening facing up, down, left or right directions respectively, thus, the corresponding shortcut key is pressed down to display the corresponding optotype in the test process; the method can also set a random opening visual target display shortcut key, so that the visual target with a random opening direction can be displayed by pressing the random opening visual target display shortcut key in the test process; the speed switching of the optotype rapidly sets a shortcut key for setting the movement speed of the optotype to be increased or decreased and the speed of each time of increase or decrease, so that the movement speed of the optotype can be rapidly switched according to the set interval by pressing the corresponding shortcut key in the test; the quick setting of the size of the optotype is used for setting a shortcut key for increasing or decreasing the size of the optotype, a series of optotypes with the size are arranged in the color dynamic vision test system, and the setting is carried out according to the size of an international standard vision chart.
Preferably, the test color setting interface is used for setting background color and optotype color; setting the background color and the optotype color by adopting one of RGB or HSV modes; clicking gray origin before RGB or HSV to confirm and select RGB or HSV color coding mode, and sequentially inputting three parameters of required color in a frame after the three parameters of RGB or HSV; in addition to the two color coding modes of RGB and HSV, clicking the rightmost standard color is allowed, and the standard color is selected in the drop-down menu, wherein the standard color comprises black, white, red, green, blue or yellow; after setting the background color and the sighting mark color, clicking a preview button below the background color and the sighting mark color can preview the background and the sighting mark condition after the selected color; setting can be carried out again by clicking "clear", and setting of the color is completed by clicking "ok".
Preferably, the motion setting interface is used for realizing motion mode setting, initial motion speed setting and initial optotype size setting; in the motion mode setting, the motion modes allowed to be selected comprise horizontal motion, vertical motion, oblique motion and random motion; clicking a gray button before a required movement mode and a movement starting point to select; wherein the horizontal movement, the vertical movement and the oblique movement all allow to select a random starting point mode, namely, the starting point of the appearance of the optotype in the test process is a random one of 2 to 4 starting points allowed to be selected in the movement mode; if a random movement mode is selected, namely, the movement mode of each sighting target in the test process is random one of horizontal movement, vertical movement and oblique movement; in the initial movement speed setting, the required initial optotype movement speed is allowed to be input in a corresponding frame, wherein the unit is degree/second; in the setting of the initial optotype size, the required initial optotype size is allowed to be input in a corresponding frame, and the optotype size is expressed by a small number representation method; clicking the "clear" below can reset the setting, clicking the "ok" completes the motion setting.
The invention also provides a method for testing the color dynamic vision by using the color dynamic vision testing system, which comprises the following steps:
s1, equipment connection and basic parameter setting: opening a computer and a screen and connecting, running color dynamic vision testing software on the computer, jumping to a basic parameter setting interface, and inputting a testing distance and a testing screen width;
s2, adjusting the distance and the height: adjusting the position of a tested seat according to the required test distance, and adjusting the height of the seat according to the position of the screen so that the tested sight looks at the central position of the screen in a head-up mode;
s3, setting test parameters: entering a test parameter setting interface, and performing shortcut key setting, color setting and motion setting;
s4, pre-training: clicking to determine to enter a pre-training interface after the color setting and the movement setting are completed, wherein a test parameter column is arranged above the pre-training interface, and the background color, the optotype movement mode, the optotype movement speed and the optotype size in the current test state are displayed in the test parameter column; wherein the background color and the optotype color are displayed in a set coding form, including RGB, HSV and standard colors; the movement speed of the optotype is displayed in units of degrees/second, and the size of the optotype is displayed as a small number representation method; clicking the black triangle at the upper right corner can hide the test parameter column; after hiding, clicking again to redisplay; default hiding test parameter fields in the test process; clicking to start pre-training starts pre-training, clicking to skip pre-training skips pre-training to start formal test; the pre-training background color, the optotype color and the optotype moving speed are the same as those of the formal test, wherein the optotype size is the initial optotype size of the formal test; pressing keys with corresponding sighting mark openings facing up, down, left or right in the keyboard, and displaying letters E with corresponding openings facing different directions; or pressing a key correspondingly displaying the optotype with the random opening direction, and displaying the optotype with the random opening direction in the screen; guiding letters appearing in the tested observation screen, pressing keys in corresponding directions in the judging device according to the opening directions of the letters, and automatically judging whether the tested judgment is correct or not by a computer program; pre-training 10 optotypes until the tested can continuously and correctly identify 5 or more optotypes, and ending the pre-training;
S5, formal test: pressing a shortcut key corresponding to the opening direction of the sighting target to be displayed, or pressing a shortcut key capable of displaying the sighting target with random opening direction, so that a patient can recognize the opening direction of a moving letter appearing in a screen, and pressing a judging key; the decision logic adopts a standard static vision examination method; at most 5 optotypes of each size are displayed, and if the patient can identify 3 optotypes of the current size, the optotype is switched to an optotype which is one number smaller than the current optotype; switching the size of the optotype by using the shortcut key for switching the size of the optotype; if the patient recognizes that the number of the current size optotypes is smaller than 3, switching to an optotype which is larger than the current optotype by one; finally obtaining at least 3 minimum optotypes which can be identified by the test, wherein the size of each optotype is T1, the size of each optotype which is larger than the minimum optotype is T2, and the number N which can be identified by the size; the dynamic vision size tested at this speed is-lgT 2-N0.02;
after testing the color dynamic vision at the speed, switching the movement speed by using the shortcut key for switching the movement speed of the optotype, thereby testing the color dynamic vision at different speeds;
after the test is finished, the test entering result output interface can be finished by pressing the carriage return; pressing the ESC exits the test.
The dynamic vision evaluation system applied in clinic in the prior art is similar to the static vision evaluation, and can only display a black visual target and a white background, but a large number of visual signals contacted by people in daily life have various different colors. Meanwhile, currently, in clinic, color vision inspection comprises a false color chart, a Farnsworth15 color code test inspection, an FM-100 color inspection and the like, and all the inspection is performed by adopting a static optotype. However, color vision and dynamic vision have interactions. There is no scheme or test method for integrating color vision and dynamic vision for inspection. Therefore, the invention has the advantage of checking the tested color dynamic vision and has important clinical significance.
The technical key points of the invention include:
1. a testing scheme and a flow of color dynamic vision;
2. in the test process, the movement speed and the movement size of the test optotype are rapidly switched through a user-defined shortcut key;
3. and a result automatic output function.
The applicant of the present invention has developed a color dynamic vision testing system which can be widely used in ophthalmic clinical procedures and which is easy to operate. Compared with the dynamic vision testing system developed before, the dynamic vision testing system is redesigned, and can display the sports optotype with specific color and simultaneously display the background with specific color, so that the color dynamic vision test can be performed.
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 (4)
1. A method for color dynamic vision testing using a color dynamic vision testing system, comprising the steps of:
s1, equipment connection and basic parameter setting: opening a computer and a screen and connecting, running color dynamic vision testing software on the computer, jumping to a basic parameter setting interface, and inputting a testing distance and a testing screen width;
s2, adjusting the distance and the height: adjusting the position of a tested seat according to the required test distance, and adjusting the height of the seat according to the position of the screen so that the tested sight looks at the central position of the screen in a head-up mode;
s3, setting test parameters: entering a test parameter setting interface, and performing shortcut key setting, color setting and motion setting;
s4, pre-training: clicking to determine to enter a pre-training interface after the color setting and the movement setting are completed, wherein a test parameter column is arranged above the pre-training interface, and the background color, the optotype movement mode, the optotype movement speed and the optotype size in the current test state are displayed in the test parameter column; wherein the background color and the optotype color are displayed in a set coding form, including RGB, HSV and standard colors; the movement speed of the optotype is displayed in units of degrees/second, and the size of the optotype is displayed as a small number representation method; clicking the black triangle at the upper right corner can hide the test parameter column; after hiding, clicking again to redisplay; default hiding test parameter fields in the test process; clicking to start pre-training starts pre-training, clicking to skip pre-training skips pre-training to start formal test; the pre-training background color, the optotype color and the optotype moving speed are the same as those of the formal test, wherein the optotype size is the initial optotype size of the formal test; pressing keys with corresponding sighting mark openings facing up, down, left or right in the keyboard, and displaying letters E with corresponding openings facing different directions; or pressing a key correspondingly displaying the optotype with the random opening direction, and displaying the optotype with the random opening direction in the screen; guiding letters appearing in the tested observation screen, pressing keys in corresponding directions in the judging device according to the opening directions of the letters, and automatically judging whether the tested judgment is correct or not by a computer program; pre-training 10 optotypes until the tested can continuously and correctly identify 5 or more optotypes, and ending the pre-training;
S5, formal test: pressing a shortcut key corresponding to the opening direction of the sighting target to be displayed, or pressing a shortcut key capable of displaying the sighting target with random opening direction, so that a patient can recognize the opening direction of a moving letter appearing in a screen, and pressing a judging key; the decision logic adopts a standard static vision examination method; at most 5 optotypes of each size are displayed, and if the patient can identify 3 optotypes of the current size, the optotype is switched to an optotype which is one number smaller than the current optotype; switching the size of the optotype by using the shortcut key for switching the size of the optotype; if the patient recognizes that the number of the current size optotypes is smaller than 3, switching to an optotype which is larger than the current optotype by one; finally obtaining at least 3 minimum optotypes which can be identified by the test, wherein the size of each optotype is T1, the size of each optotype which is larger than the minimum optotype is T2, and the number N which can be identified under the size T2; the dynamic vision size tested at this speed is-lgT 2-N0.02;
after testing the color dynamic vision at the speed, switching the movement speed by using the shortcut key for switching the movement speed of the optotype, thereby testing the color dynamic vision at different speeds;
after the test is finished, the test entering result output interface can be finished by pressing the carriage return; pressing the ESC to exit the test;
The color dynamic vision testing system comprises color dynamic vision testing equipment, a color dynamic vision testing optotype display unit and a color dynamic vision result output unit, wherein the color dynamic vision testing equipment comprises a computer for testing, a screen and a judging device, and the screen is connected with the computer and is used for displaying a quick setting interface, a test color setting interface, a movement setting interface, a color dynamic vision testing optotype, a pre-training interface and a result output interface; the judging device is connected with the computer and the screen, and the key information which is tested to be pressed on the judging device is transmitted to the computer, so that the computer can automatically judge whether the key information is correct or incorrect; the computer is used for a user to set basic parameters, quickly set, test colors and exercise, and operates the color dynamic vision testing software to test the color dynamic vision; the color dynamic vision test optotype display unit is used for controlling the color dynamic vision test optotype to display on the screen along a set movement mode according to preset parameters, and the color dynamic vision result output unit is used for automatically recording the whole process of the color dynamic vision test, automatically outputting the test result after the test is finished, and simultaneously storing the original data in a local file;
The test result automatically output by the color dynamic vision result output unit comprises background color, optotype movement speed, movement mode and dynamic vision; the original data comprise background color, optotype movement speed, movement mode, optotype opening direction and optotype opening direction of tested response when displaying each optotype in the test process;
the test computer is also connected with the keyboard, and when a key on the keyboard is pressed, the corresponding sighting mark moves along a set movement mode and disappears after the movement; pressing the key on the keyboard again after the optotype disappears can display the corresponding optotype again, and pressing the key on the keyboard does not respond when the optotype moves on the screen;
the method comprises the steps that the optotype color is coded by adopting RGB or HSV, setting is carried out before testing, and the optotype is always located on a background to move in the testing process, wherein the optotype color is not overlapped with the background color;
the motion mode comprises horizontal motion, vertical motion, oblique motion and random motion, and is set before the test starts; wherein the horizontal movement appears from the middle of the left edge or the right edge of the screen, moves to the other side along the horizontal line, and then disappears; the vertical movement occurs from the middle of the upper edge or the lower edge of the screen, moves to the other side along the vertical line, and then disappears; diagonal movement is from one of the four corners of the screen, diagonally to the other corner; the random motion is a random occurrence of horizontal motion, vertical motion or oblique motion;
The movement speed of the optotype is input by taking the visual angle/second as a unit; the color dynamic vision test optotype display unit automatically calculates a pixel value which needs to move on a screen every second according to the test distance, the screen width, the screen pixels and the input optotype movement speed;
the background color is coded by adopting RGB or HSV, is set before the test and is always displayed in the test process;
the background color and the optotype color are standard colors, including black, white, red, green, blue or yellow.
2. The method of claim 1, wherein the predetermined parameters include background color, target size, target movement speed and movement pattern.
3. The method for performing color dynamic vision testing using a color dynamic vision testing system as defined in claim 2, wherein the color dynamic vision testing optotype displayed on the screen is uppercase letter E with its opening facing up, down, left or right, and wherein optotype E is letters in the international standard visual acuity chart, each line of letter E has the same width, and the gap width between lines is the same as the width of the line.
4. The method for color dynamic vision testing using color dynamic vision testing system according to claim 1, wherein the size of the optotype is inputted according to a small number expression method according to a static vision testing habit, and the color dynamic vision testing optotype display unit automatically calculates the size of the actual optotype to be displayed on the screen according to the testing distance, the screen width, the screen pixels and the inputted optotype size.
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