CN111956177B

CN111956177B - System for quantifying deformation of visual object

Info

Publication number: CN111956177B
Application number: CN202010825325.9A
Authority: CN
Inventors: 张琪; 吕林
Original assignee: Zhongshan Ophthalmic Center
Current assignee: Zhongshan Ophthalmic Center
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2022-01-11
Anticipated expiration: 2040-08-17
Also published as: CN111956177A

Abstract

The invention relates to a system for quantifying deformation of an object, which can comprehensively evaluate the deformation of the object and comprises the following components: a central display module; the table display module is used for displaying a table in a preset X' display area so that a user can watch a central watching graph and feed back whether the seen table is deformed or not, and the display of the table is cancelled after the user finishes the feedback that whether the seen table is deformed or not; the dot matrix testing module is used for displaying n1 display dot matrixes after the table display is cancelled, sequentially displaying a plurality of rectangular dot matrixes each time to enable a user to watch the central watching graph and judge whether a deviation point exists or not, and displaying the next display dot matrix after the user finishes the judgment of the deviation point; and the intersection testing module displays a plurality of parallel lines in the preset X' display area so that a user can watch the central watching graph and feed back whether the parallel lines are intersected or not and the number of the intersected parallel lines.

Description

System for quantifying deformation of visual object

Technical Field

The invention relates to the technical field of quantitative evaluation of ophthalmic medical visual functions, in particular to a system for quantifying visual object deformation.

Background

The retina of a human eye is laid on the inner surface of the choroid very smoothly like a mirror, and when the normal eye looks at things, the object image projected on the retina is very smooth and can objectively reflect the size and the shape of the object image. If the retina becomes rough or edematous for some reason (e.g., central serous retinopathy, retinal detachment, pre-macular membrane, macular hole, high myopia macular cleavage or hole, macular degeneration, hemorrhage, etc.), east and west of the eye deform, medically known as optic deformation.

Existing ophthalmic medicine performs qualitative or quantitative assessment of visual deformation by a variety of methods, one of which includes the Amsler grid. The Amsler grid size is 10cm by 10cm, and there are 20 by 20 grids, each 5mm by 5mm, and the patient views the grid at 30cm with a 1 degree viewing angle. The procedure for examining visual distortion using the Amsler checkerboard was: the Amsler grid table is placed at a position 30cm away from a patient to be examined, the central fixation point is watched by a single eye, and whether the lines and the grids are deformed or not and whether dark spots exist or not are observed. Generally, people with visual artifacts can find uneven lines or distorted grids in the Amsler grid table. The Amsler grid table is used for detecting whether a patient has visual object deformation, is a qualitative measurement method, is simple and feasible, can systematically evaluate the visual object deformation and scotoma, has good correspondence between visual function and retina structure, but has low sensitivity, poor self-detection feasibility of the patient, is easily influenced by refractive factors, and cannot quantify the visual object deformation degree.

A method for quantitative assessment of visual deformation, one of which includes the degree of visual deformation (M-charts). The severity of the ocular deformation can be quantified using M-charts, and the ocular deformation is evaluated by measuring the Vertical ocular deformation Score (MV), the Horizontal ocular deformation Score (MH) and the average value (M-Score) thereof. The procedure for quantifying the degree of visual deformation using M-charts is: establishing a scale with a vertical line and a horizontal line, wherein the line is composed of 19 points, placing the scale at a position 30cm away from a patient, correcting ametropia, watching a central fixation point by a single eye, observing whether a straight line is deformed, continuously enlarging the distance between the points, and when the straight line visual object deformation disappears, determining the deformation of the visual object, and respectively detecting the deformation degrees in the vertical direction and the horizontal direction. The M-charts scale is not only used for quantifying the deformation degree of the visual objects, but also used for evaluating the deformation and the spatial resolution of the visual objects, has higher sensitivity, but has a limited range of detection visual fields, can only detect the deformation degrees in the vertical direction and the horizontal direction through the fovea centralis, and cannot comprehensively evaluate the deformation of the visual objects of patients.

Disclosure of Invention

The present invention is directed to overcoming at least one of the above-mentioned deficiencies in the prior art and providing a system for quantifying visual deformation for overall evaluation of the quantified visual deformation and establishing a visual deformation scoring system for simple and convenient quantification of the visual deformation.

The invention adopts the technical scheme that a system for quantifying the deformation of an object to be viewed comprises the following components:

the central display module is used for displaying a central watching graph;

the table display module is used for displaying a table in a preset X X X' display area so that a user can watch the central watching graph and feed back whether the seen table is deformed or not, and the display of the table is cancelled after the user finishes the feedback that whether the seen table is deformed or not;

a dot matrix testing module, configured to cancel the display of the table, display n1 times of display dot matrices in the preset X × X' display area, where n1 is an integer greater than or equal to 1, sequentially display a rectangular dot matrix of a rectangular area surrounded by four points (i, j), (i, Yk-i +1), (Yk-j +1, j), (Yk-i +1, Yk-j +1) each time the display dot matrix is displayed, Yk is a side length point of the rectangular dot matrix displayed at the kth time, the side length points Yk of the dot matrix displayed at each time are different, and i and j are respectively 1,2, … …, and 1/2(Yk-1), so that a user can watch the center watching graph and determine whether there is a deviation point or not when the user finishes displaying the dot matrix at one time, and after determining the deviation point, displaying the next display dot matrix;

and the intersection testing module is used for displaying a plurality of parallel lines in the preset X' display area after the dot matrix testing module displays the display dot matrix for n1 times so that a user can watch the center watching graph and feed back whether the observed parallel lines are intersected or not and the number of the intersected parallel lines.

The invention relates to a system for quantifying deformation of an object to be viewed, which realizes comprehensive quantification of deformation of the object to be viewed by utilizing a computer-aided technology, combines quantification of deformation of the object to be viewed with analysis of subjective deformation data of the object to be viewed by an Amsler grid table and evaluation of visual quality, mainly comprises a central display module, a table display module, a dot matrix test module and an intersection module, and adopts a plurality of modules in the system to realize the process of evaluating and quantifying deformation of the object to be viewed: firstly, a central watching graph is displayed on a computer screen through a central display module and is always displayed in each module of the system, so that a user can always keep a watching point in macular fovea in the visual deformation evaluation detection, and the central watching graph can be any graph including a circle, a square, a cross and the like; secondly, displaying a table in a preset display area of X multiplied by X ' through a table display module, wherein the size of the table displayed in the display area of X multiplied by X ' is X multiplied by X ', the side length of the display area is set in the table display module by the system, the display areas in a dot matrix test module and an intersection module are kept fixed, namely the size of a display dot matrix is X multiplied by X ', and the size of a parallel line display area in the intersection module is X multiplied by X ', so that a user can watch the center watching graph and feed back whether the seen table is deformed or not through the table display module, and the display of the table is cancelled when the user feeds back whether the seen table is deformed or not; displaying n1 times of display dot matrix by a dot matrix test module in a preset X' display area, wherein n1 is an integer which is more than or equal to 1, and displaying a rectangular dot matrix in a rectangular area surrounded by four points (i, j), (i, Yk-i +1), (Yk-j +1, j), (Yk-i +1, Yk-j +1) in turn when displaying the dot matrix in the dot matrix test module, wherein Yk is the length of the rectangular dot matrix displayed at the kth time, the length of the dot matrix length Yk of the rectangular dot matrix displayed at each time is different, i and j are respectively 1,2, … … and 1/2(Yk-1), so that a user can watch the center watching graph and judge whether a deviation point appears or not when displaying the dot matrix at each time, the deviation point is one or more points which are not on a straight line (no matter horizontal or vertical) in the rectangular dot matrix, after the user finishes judging the deviation points in the dot matrix displayed for one time, continuously displaying the next display dot matrix until the display of all the display dot matrixes is finished; and finally, after displaying the dot matrix for n1 times, displaying a plurality of parallel lines and a central watching graph in a preset X' display area through an intersection test module, wherein the direction of the parallel lines can be any angle, so that a user can watch the central watching graph and feed back whether the observed parallel lines are intersected or not and the number of the intersected parallel lines.

The system for quantifying the deformation of the visual objects is innovative on the basis of the combination of an Amsler check table and a visual object deformation degree quantification table, overcomes the defects of low self-detection feasibility, small detection visual field range and the like of the traditional detection method, can qualitatively, quantitatively and comprehensively measure the deformation of the visual objects, analyzes the visual object deformation data and evaluates the visual quality by using a computer-aided technology and an image processing technology, and more simply, conveniently and comprehensively realizes the evaluation and quantitative detection of the deformation of the visual objects of patients.

Further, the dot matrix testing module is further configured to acquire the coordinates of the deviated points, and cancel the display of the deviated points after acquiring the coordinates of the deviated points.

In the invention, a dot matrix test module displays n1 display dot matrixes and a central watching graph so that a user watches the central watching graph and judges whether a deviation point exists, a plurality of display dot matrixes in the dot matrix test module are displayed by utilizing a computer technology and an image processing technology, the judgment of a patient on the deviation point can be specifically that the seen deviation point is selected by clicking, to trigger the computer to recognize and acquire the positioning coordinates of the clicked deviated point, wherein the deviated point is one or more points in the direction deviated from the straight line in the display dot matrix, when the user finishes the judgment of the deviation point and the computer identifies and acquires the positioning coordinate of the judged deviation point, the display of the deviation point judged to be the display is cancelled, and after the user finishes judging all the deviated points in the n 1-time display dot matrix and the dot matrix testing module acquires the positioning coordinates of all the deviated points, the display of the displayed dot matrix is cancelled. In the dot matrix testing module, the arrangement and display rules of the dot matrix are complex, the displayed dot matrix times can be preset according to actual conditions, more comprehensive evaluation and measurement are carried out on a detection user by displaying the dot matrix for multiple times and simultaneously displaying the rectangular dot matrix for multiple times in the displayed dot matrix, the side length and the number of the dot matrix displayed in the rectangular dot matrix are different each time (but the distance between the dot and the dot is the same), and the deformation degree of a visual object of a patient is quantized more specifically and comprehensively through data analysis by obtaining the coordinate data of the deviated dot in the displayed dot matrix each time, so that the deformation degree is quantitatively recorded.

Further, the intersection test pattern includes:

the first intersection testing unit is used for displaying N first parallel lines parallel to the set direction in the preset X' display area after the dot matrix testing module displays N1 display dot matrixes, so that a user can watch the central watching graph and feed back whether the first parallel lines are intersected or not and the number of the intersected parallel lines;

and the second intersection testing unit is used for displaying N second parallel lines vertical to the set direction in a preset X' display area after the user feeds back whether the first parallel lines are intersected or not, so that the user can watch the central watching graph and feed back whether the second parallel lines are intersected or not and the number of the intersected parallel lines.

The intersection testing module is used for displaying a plurality of parallel lines and a central watching graph in a preset X' display area through the intersection testing module after displaying the dot matrix for n1 times, so that a user can watch the central watching graph and feed back whether the observed parallel lines are intersected or not, wherein the parallel lines are displayed in two set directions which are perpendicular to each other, and therefore the parallel line display in the two perpendicular directions is respectively completed through the first intersection testing unit and the second intersection testing unit. The first intersection testing unit is used for displaying N first parallel lines parallel to the set direction in a preset X' display area after N1-time dot matrixes are displayed, a user watches the central watching graph and feeds back whether the first parallel lines are intersected or not and the number of the intersected parallel lines when the first parallel lines are intersected, and the feedback result is input to a computer and then the display of the first parallel lines is cancelled; the second intersection testing unit is used for displaying N second parallel lines which are perpendicular to the set direction after the user feeds back whether the first parallel lines are intersected or not (no matter whether the first parallel lines are intersected or not fed back by the user) and cancels the display of the first parallel lines, namely the second parallel lines are perpendicular to the first parallel lines, and the user continuously watches the central watching graph and feeds back whether the second parallel lines are intersected or not and feeds back the number of the intersected parallel lines when the second parallel lines are intersected. On the basis of M-charts quantitative visual object deformation degree, two mutually perpendicular lines are added to a plurality of mutually perpendicular parallel lines, and the deformation degrees in two set directions are respectively detected; and the number of the parallel lines which are intersected is fed back by the patient, namely, the influence of the deformation degree of the visual object and the deformation of the visual object on the life of the patient is measured in another dimension, wherein if all the lines are deformed but do not have crossed meanings, the fonts of the patient read in reality are deformed but can be recognized, and therefore the score of the deformation of the visual object is not as high as the crossed value.

Further, the first intersection testing unit is specifically configured to display N2 times of N first parallel lines parallel to a set direction in the preset X × X' display area after the dot matrix testing module finishes displaying the dot matrix for N1 times, so that a user can watch the central watching graph and feed back whether the first parallel lines are intersected or not when displaying the first parallel lines each time, and the number and the spacing of the first parallel lines are different when displaying the first parallel lines each time;

the second intersection testing unit is specifically configured to display N2 times of N second parallel lines perpendicular to the set direction in the preset X × X' display area after the user feeds back whether the first parallel lines are intersected, so that the user watches the central watching graph and feeds back whether the second parallel lines are intersected every time the user displays the second parallel lines, and the number and the distance of the second parallel lines are different every time the second parallel lines are displayed.

The first intersection test unit and the second intersection test unit respectively comprise a plurality of times of display of a first parallel line and a second parallel line, and the method specifically comprises the following steps: the first intersection testing unit is specifically configured to display N2 times of N first parallel lines parallel to the set direction in the preset X × X' display area, and set the distance and the number of the N first parallel lines at each time, where the distance and the number of the first parallel lines at each time are different, so that a user can watch a central watching graph and feed back whether the first parallel lines are intersected or not when displaying the first parallel lines at each time; similarly, the number of times the second cross test unit is displayed and the distance and the number of N second parallel lines displayed at a time are the same as those of the first cross test unit, and the directions of the first parallel lines and the second parallel lines are perpendicular to each other. According to the invention, on the basis of adding a plurality of parallel lines to enlarge the visual field range, the user can feed back the distance between the parallel lines which are intersected according to the distance between the parallel lines on the basis of feeding back whether the parallel lines are intersected or not by displaying the plurality of parallel lines for a plurality of times and quantifying the number and the distance of the parallel lines, so that the quantitative evaluation of the visual deformation of the user is realized.

Furthermore, X is 0-25 cm, and X' is 0-25 cm.

Furthermore, the number Yk of the side points of the rectangular lattice is 0-200.

Furthermore, the number N of the first parallel lines and the number N of the second parallel lines are respectively 0-200.

The dot matrix testing module displays n1 times of display dot matrixes, wherein each time the display area is X multiplied by X', the side length of the display dot matrixes is the same, the range of the side length X of the display area which can be set according to the size of an actual display computer screen is 0-25 cm, each time the rectangular dot matrixes in the rectangular area enclosed by four points of (i, j), (i, Yk-i +1), (Yk-j +1, j), (Yk-i +1, Yk-j +1) are displayed once, the side length Yk of the rectangular dot matrixes displayed each time are different, and the preset can be carried out in the range of 0-200 Yk according to the condition of an actual patient. Similarly, the side length of the display dot matrix is preset according to the size of an actual display screen, the number of the corresponding first parallel lines and the number of the corresponding second parallel lines are also preset on a specified display screen, the range of the number N of the parallel lines is 0-200, the direction of the parallel lines adopted in the system can be any angle, the length of the parallel lines is 0-25 cm, the parallel lines are consistent with the side length of the rectangle of the dot matrix test module, and the side length value is set according to the specific condition of a patient.

Further, n1 takes a value of 4, and the number Yk of side points of the display lattice displayed 4 times is 5, 11, 21 and 41 respectively.

The value range of the side length X of the display lattice in the lattice testing module can be 0-25 cm, the value range of X 'can be 0-25 cm, the specific value of X can be determined according to the size of an actual display screen, the size of X can be expanded or reduced on the size of 10cm multiplied by 10cm of the existing amsler table, and after the size of the side length X of the display lattice and the size of X' are preset, the rectangular dot matrix is displayed within a rectangular range formed by the side length of a plurality of display dot matrixes, the invention particularly displays the dot matrixes by four times within a display area of 10 multiplied by 10, and the number Yk of the side length points of the rectangular dot matrix formed in each display dot matrix is different, Yk is respectively 5, 11, 21 and 41, if the display dot matrix expands the interval n times on the basis of the interval of 20 multiplied by 20 grids of the amsler table, when the value is 5 multiplied by 5 points, the distance is expanded by 2 times on the basis of 20 multiplied by 20 grid distances of an amsler table; the values are 11 and 21, 11 × 11 is the interval expansion 1 times on the basis of the amsler table, 21 × 21 is the same as the amsler table interval, 41 × 41 is the interval reduction 1 time. The invention can simply and definitely identify whether the distortion exists or not based on the mode of continuously expanding the distance of the amsler square table, particularly, the distortion is difficult to identify from dense lattices when a patient with poor eyesight uses the amsler square table to detect, and false negative easily appears, the invention uses the points to replace lines, measures the degree of distortion of the visual object by reducing the distance between the points (the distance between each point and each point is the same), designs four times of lattice tests skillfully for many times, continuously and sequentially expands the size of the display lattice in each lattice, is equivalent to continuously adding a rectangular ring layer for displaying the lattice on the computer level, thereby expanding the detection visual field range of the distortion of the visual object of a user, judging whether the deviation exists or not for the user aiming at each rectangular ring layer lattice, and quantitatively processing the coordinates of the deviation points through the distance between the size of the display lattice and the points, and further, the aim of quantifying the deformation of the visual object of the user is fulfilled.

Further, when the value of N2 is 4, and the parallel lines are displayed 4 times, the number N of the parallel lines is 5, 11, 21, and 41, respectively.

The method comprises the steps of displaying a dot matrix four times in a display area of 10cm multiplied by 10cm, and then displaying a plurality of parallel lines, wherein the value of n2 is 4, namely, a first intersection testing unit and a second intersection testing unit respectively display the plurality of parallel lines four times, specifically, after the dot matrix testing module displays all the dot matrixes and clears the dot matrixes, the first intersection testing unit firstly displays 5 first parallel lines parallel to a set direction and a center watching graph, and the distance between the 5 first parallel lines is 2cm, so that a user can watch the center watching graph and feed back the distance of the first parallel lines with intersection; then 11 first parallel lines parallel to the set direction and a center watching graph are displayed, wherein the distance between the 11 first parallel lines is 1cm, so that a user can watch the center watching graph and feed back the distance of the intersected first parallel lines; then 21 first parallel lines parallel to the set direction and a center watching graph are displayed, wherein the distance between the 21 first parallel lines is 0.5cm, so that a user can watch the center watching graph and feed back the distance of the intersected first parallel lines; finally, 41 first parallel lines parallel to the set direction and a center gazing figure are displayed, and the interval of the 41 first parallel lines is 0.25cm, so that the user can gaze at the center gazing figure and feed back the interval of the first parallel lines where the intersection appears. Similarly, after the first parallel lines are displayed 4 times, the display of the first parallel lines is cleared, and the second parallel lines perpendicular to the set direction are continuously displayed according to the same display rule as the first parallel lines. The invention relates to a method for quantitatively measuring the deformation of a visual object of a patient by establishing a single transverse and longitudinal straight line in the mutually vertical direction according to the deformation degree of the traditional M-charts quantitative visual object, which is based on an M-charts quantitative visual object deformation degree table and continuously enlarges parallel lines, so that the patient can simply and clearly identify whether the parallel lines are deformed, particularly, when the patient with poor eyesight uses the M-charts quantitative visual object deformation degree, the deformation is difficult to identify from dense lattices, false negatives easily occur, a plurality of parallel lines are used, and the deformation degree of the visual object is measured by increasing the number of the parallel lines.

Further, the system also comprises a report generation module which is used for automatically generating the visual deformation analysis report according to the feedback of the user.

The system also comprises a report generation module which can automatically generate the visual deformation analysis report according to the feedback data of the user. Specifically, the report generation module may analyze the quantitative data according to data of deformation of a user feedback form in the form display module, positioning coordinate data of a user feedback deviation point in the dot matrix test module, whether the first parallel line and the second parallel line are intersected or not, the number of intersected parallel lines and the like fed back by the user in the first intersection test unit and the second intersection test unit, and further may set a score ratio for the data content, and automatically generate a score table of the visual object deformation.

Compared with the prior art, the invention has the beneficial effects that: the invention relates to a system for quantifying the deformation of a visual object, which is innovatively invented on the basis of combining an Amsler check sheet and a visual object deformation degree quantification sheet, overcomes the defects of low self-detection feasibility, low sensitivity, small detection visual field range and the like of the traditional detection method, has simple and feasible steps, can be used for the self-detection of patients on line, can qualitatively, quantitatively, simply, conveniently and comprehensively analyze the deformation of the visual object, utilizes a computer-aided technology and an image processing technology to analyze the deformation data of the visual object and evaluate the visual quality, more comprehensively realizes the evaluation and quantitative detection of the deformation of the visual object of the patient, and is favorable for the patient and a doctor to know the change of the illness state and to seek medical advice in time through a visual object deformation analysis report.

Drawings

FIG. 1 is a system block diagram of the present invention.

FIG. 2 is a flow chart of the system of the present invention.

Detailed Description

The drawings are only for purposes of illustration and are not to be construed as limiting the invention.

The system development of the invention adopts a cross-platform development language Java, and simultaneously adopts a mainstream desktop operating system, such as Windows, MacOS, Linux, apple, android app system and the like. Before each module in the system is displayed and tested, attention needs to be paid to calibrating the pixel density of a display device screen to be displayed, and the specific calibration process comprises the following steps: a screen pixel density (PPI), i.e., pixels per inch, is obtained through the API and converted to pixels per millimeter (PPMM). Conversion formula: and y is x/2.54/10, wherein x is PPI, y is PPMM, and a 6-digit significant digit is reserved after the decimal point. Since some operating systems cannot accurately acquire the screen PPI, the system should also provide a function of manually calibrating the PPI. The process of manually calibrating PPI is: in the setting-display calibration, the process of continuously adjusting the physical size of the graph displayed on the screen is realized by manually appointing the PPI value of the screen, when the physical size of the graph displayed on the screen is consistent with the algorithm design, the PPI at the moment is recorded as the correct PPI value of the current display equipment, after one-time calibration, software remembers the value, and then calibration is not needed.

Moreover, because the PPIs of different display screens are different, when the system is applied to a display device screen to be displayed, the accumulated deviation occurs in the position of the central gaze point, and in order to eliminate the problem of slight deviation of the central gaze point and the central orthogonal axis caused by the accumulated deviation, parity compensation needs to be performed on the gaze point and the orthogonal axis coordinate passing through the gaze point, so that when the orthogonal axis width is even number of pixel points, the central gaze point can be automatically adjusted to be even number of pixel points even if the central gaze point is odd number of pixel points, thereby ensuring that the gaze point is always symmetrical about the central orthogonal axis.

Examples

As shown in fig. 1, the present embodiment is a system for quantifying visual deformation, including:

the central display module is used for displaying a central gazing figure, and specifically, the central gazing point is adopted in the embodiment;

the table display module is used for displaying a table in a preset X' display area so that a user can watch the central gazing point and feed back whether the viewed table is deformed or not, and the display of the table is cancelled after the user finishes the feedback of whether the viewed table is deformed or not;

the dot matrix testing module is used for displaying n1 times of display dot matrixes in a preset X' display area after the display of the table is cancelled, n1 takes the value of an integer larger than or equal to 1, a rectangular dot matrix of a rectangular area surrounded by four points (i, j), (i, Yk-i +1), (Yk-j +1, j), (Yk-i +1, Yk-j +1) is sequentially displayed each time the dot matrixes are displayed, Yk is the side length point number of the rectangular dot matrix displayed at the kth time, the side length point number Yk of the rectangular dot matrix displayed each time is different, i and j take the values of 1,2, … … and 1/2(Yk-1) respectively, so that the user can watch the central gazing point and judge whether there is a deviation point when displaying the dot matrix each time, after the user finishes judging the deviation point when displaying the dot matrix for one time, displaying the next dot matrix;

preferably, the dot matrix testing module is further configured to acquire coordinates of the deviated point, and cancel display of the deviated point after acquiring the coordinates of the deviated point;

the intersection testing module is used for displaying a plurality of parallel lines in a preset X' display area after the dot matrix testing module finishes displaying n1 dot matrixes, so that a user can watch the central fixation point and feed back whether the observed parallel lines are intersected or not and the number of the intersected parallel lines;

preferably, the intersection testing module comprises:

the first intersection testing unit is used for displaying N first parallel lines parallel to the set direction in a preset X' display area after the dot matrix testing module displays N1-time display dot matrixes, so that a user can watch the central fixation point and feed back whether the first parallel lines are intersected or not and the number of the intersected parallel lines; specifically, the first intersection testing unit is specifically configured to display N2 times of N first parallel lines parallel to a set direction in a preset X × X' display area after the second dot matrix testing module displays N1 times of dot matrices, so that a user watches the central gaze point and feeds back whether the first parallel lines are intersected and the number of intersected parallel lines every time the first parallel lines are displayed, and the number and the interval of the first parallel lines are different every time the first parallel lines are displayed;

the second intersection testing unit is used for displaying N second parallel lines vertical to the set direction in a preset X' display area after the user feeds back whether the first parallel lines are intersected or not so that the user can watch the central fixation point and feed back whether the second parallel lines are intersected or not and the number of the intersected parallel lines; specifically, the second intersection testing unit is specifically configured to display N2 times of N second parallel lines perpendicular to the set direction in a preset X × X' display area after the user feeds back whether the first parallel lines are intersected, so that the user watches the central gaze point and feeds back whether the second parallel lines are intersected and the number of the intersected parallel lines every time the user displays the second parallel lines, and the number and the interval of the second parallel lines are different every time the second parallel lines are displayed.

And the report generation module is used for automatically generating a visual deformation analysis report according to the feedback of the user.

Fig. 2 is a system flowchart according to an embodiment of the present invention, and the implementation steps of the system are specifically described in detail according to the flowchart:

1. firstly, the system is started, and a table display module is started: a 20 x 20 table is shown, each grid size being 5x5mm, with a central gazing point in the center of the table, the size being 1.5x1.5 mm. The line width of the table is 0.5mm, inquiring whether the table and the lines of the patient deform, and entering 2 after the judgment is finished;

2. entering a dot matrix test module, starting to display the dot matrix for 4 times, and entering a 5 multiplied by 5 dot matrix test when the side length Yk of the rectangular dot matrix in the dot matrix for the first time is 5: the screen is cleared, showing 5x5 points and a central fixation point, point size 1x1mm, allowing the patient to click on points that are not on a straight line (regardless of horizontal or vertical), and the clicked point disappears (except for the central fixation point). Then entering into step 3;

3. when the number Yk of the side points of the rectangular dot matrix in the second display dot matrix is 11, an 11 multiplied by 11 dot matrix test is carried out: the screen is cleared and the 11x11 dot matrix test is entered, dot size 1x1 mm. The center fixation point is shown, and the size is 1.5X1.5 mm. Points of a rectangular region surrounded by four points (i, j), (i,11-i +1), (11-j +1, j), (11-i +1,11-j +1) are shown in order, that is, (1, 1), (1, 11), (11, 1), (11, 11); and (2, 2), (2, 10), (10, 2) and (10, 10) … …, wherein i and j have the values of 1-5, so that the patient clicks a point which is not on a straight line, and the clicked point disappears. Then entering 4;

4. when the number Yk of the rectangular lattice side length points in the lattice is 21 in the third display, a 21x21 lattice test is carried out: the screen is cleared and the 21x21 dot matrix test is entered, dot size 1x1 mm. The center fixation point is shown, and the size is 1.5X1.5 mm. Points of a rectangular region surrounded by four points (i, j), (i,21-i +1), (21-j +1, j), (21-i +1,21-j +1) are shown in order, that is, (1, 1), (1, 11), (11, 1), (11, 11); and (2, 2), (2, 10), (10, 2) and (10, 10) … …, wherein i is 1-10, so that the patient clicks a point which is not on a straight line, and the clicked point disappears. Then 5 is entered;

5, when the rectangular lattice side length point Yk in the lattice is displayed for the fourth time to be 41, entering a 41 × 41 lattice test: clear screen, enter 41x41 dot matrix test, dot size 1x1 mm. The center fixation point is shown, and the size is 1.5X1.5 mm. Points of a rectangular region surrounded by four points (i, j), (i,21-i +1), (21-j +1, j), (21-i +1,21-j +1) are shown in order, that is, (1, 1), (1, 11), (11, 1), (11, 11); and (2, 2), (2, 10), (10, 2) and (10, 10) … …, wherein i is 1-20, so that the patient clicks a point which is not on a straight line, and the clicked point disappears. Then entering into step 6;

more specifically, for several steps in the dot matrix test module, a central fixation point appears after entering the dot matrix, and a rectangle formed by a layer of dots from inside to outside with the central fixation point as the center appears in sequence.

6. Entering an intersection testing module, starting to display the first intersection testing module, and entering a longitudinal 5 parallel line intersection test: and clearing the screen, displaying a central fixation point, wherein the size of the central fixation point is 1.5x1.5mm, the width of the line is 0.5mm, and displaying 5 longitudinal parallel lines, the length of the parallel lines is 10cm, the distance between the parallel lines is 2cm, so that a patient can see whether an intersecting line appears and obtain the distance between the two intersecting parallel lines. Then 7 is entered;

7. entering a longitudinal 11 parallel line intersection test: the density of the added lines was 11, spaced 1cm apart, allowing the patient to see if intersecting lines were present and to obtain the spacing of the two parallel lines that intersect. Then 8 is entered;

8. entering a longitudinal 21 parallel line intersection test: the density of the added lines was 21 lines with a spacing of 0.5cm, allowing the patient to see if an intersecting line appeared and to obtain the spacing of the two parallel lines that intersected. Then 9 is entered;

9. entering a longitudinal 41 parallel line intersection test: the density of the added lines was 41 lines with a spacing of 0.25cm, allowing the patient to see if an intersecting line appeared and to obtain the spacing of the two parallel lines that intersected. Then 10 is entered;

10. and starting a second intersection testing module in the intersection testing modules to respectively start horizontal 5, 11, 21 and 41 parallel line tests: emptying the screen, changing the longitudinal line into the transverse line, and repeating the step 5-7;

11. a report generation module: and generating and storing a visual deformation analysis report.

The system can be put into a cloud platform for use, the implementation steps are simple and easy to implement, and a user is guided to perform one-step operation and can be used for user online self-test; the visual deformation and the influence of the visual deformation on the life quality can be comprehensively evaluated and quantified, the change of the illness state of a patient before and after treatment can be monitored, and the patient can see a doctor in time; eliminates the influence of refraction factors and has high detection sensitivity.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.

Claims

1. A system for quantifying visual deformation, comprising:

the central display module is used for displaying a central watching graph;

a dot matrix testing module, configured to cancel the display of the table, display n1 times of display dot matrixes in the preset X × X' display area, where n1 is an integer greater than or equal to 1, sequentially display a rectangular dot matrix of a rectangular area surrounded by four points (i, j), (i, Yk-i +1), (Yk-j +1, j), (Yk-i +1, Yk-j +1) each time the display dot matrix is displayed, Yk is a side length point of the rectangular dot matrix displayed at the kth time, the side length points Yk of the dot matrix displayed at each time are different, and i and j are respectively 1,2, … …, and 1/2(Yk-1), so that a user can watch the center watching graph and determine whether there is a deviation point or not when the user finishes determining the deviation point in one-time display, displaying the next display dot matrix;

and the intersection testing module is used for displaying a plurality of parallel lines in the preset X' display area after the dot matrix testing module finishes displaying the dot matrix for n1 times so that a user can watch the center watching graph and feed back whether the observed parallel lines are intersected or not and the number of the intersected parallel lines.

2. The system according to claim 1, wherein the dot matrix testing module is further configured to obtain coordinates of the deviation point, and cancel the display of the deviation point after obtaining the coordinates of the deviation point.

3. A system for quantifying visual deformation according to claim 1, wherein the intersection testing module comprises:

4. The system according to claim 3, wherein the first intersection testing unit is specifically configured to display N2 times N first parallel lines parallel to a set direction in the predetermined X' display area after the dot matrix testing module displays N1 times of display dot matrices, so that a user can watch the central watch pattern and feed back whether the first parallel lines are crossed and the number of crossed parallel lines is different each time the first parallel lines are displayed;

5. The system according to claim 1, wherein X is 0-25 cm and X' is 0-25 cm.

6. The system for quantifying visual deformation according to claim 1, wherein the number Yk of the dot length points of the rectangular lattice is 0-200.

7. The system according to claim 4, wherein the number N of the first parallel lines and the second parallel lines is 0-200.

8. The system of claim 6, wherein n1 is 4, and the number Yk of the side points of the displayed dot matrix is 5, 11, 21, 41 respectively when n1 is 4.

9. The system of claim 7, wherein N2 is 4, and the number N of the first parallel lines and the second parallel lines is 5, 11, 21, and 41 when the first parallel lines and the second parallel lines are displayed 4 times.

10. A system for quantifying visual deformation according to any one of claims 1 to 9, further comprising: