CN214549357U - Automatic strabismus checking system - Google Patents

Abstract

The present application provides an automatic strabismus inspection system, the system comprising: the posture fixing piece is provided with a bracket, and a chin rest is fixed on the bracket; the display screen is fixed on the wall surface facing the posture fixing piece, and a sliding rail capable of moving up and down is arranged behind the display screen; a camera is arranged on the display screen; the display screen displays the point light sources according to a plurality of different preset positions on the image of the Hess screen. The method and the device can effectively improve the accuracy of strabismus examination, save examination time, and simultaneously keep examination data of an examinee in an electronic form, thereby facilitating subsequent disease analysis.

Description

Automatic strabismus checking system

Technical Field

The application relates to the technical field of eye strabismus inspection equipment, in particular to an automatic strabismus inspection system.

Background

The traditional Hess screen has 9 red light marked patterns, for example, each side of the patterns is 7.5cm, and the red light can be respectively turned on and off. In the conventional Hess screen, when the examinee is diagnosed with an oblique angle at each diagnostic eye position, the examinee is seated on the opposite side of the Hess screen. The red and green glasses are used for examination, because the red and green are complementary. The eye wearing the red lens can only see the red light target, while the green indicator light or the green pointer stick is only seen by the other eye wearing the green glasses. The patient is usually required to point out the position of a red mark or a red indicator light on the Hess screen using a green laser pointer or to mark the red light seen using a green indicator stick and the examiner positions the green spot on the Hess screen, examines both the 15 ° and 30 ° ranges of red marks, and draws on paper by the doctor to record the position it points to. After one eye examination, the two eyes of the red and green glasses are exchanged in color, and then the other eye is examined and the graph is recorded.

The inspection process has the following problems:

1. during the inspection, the inspector needs to confirm the position of the green spot with the inspected person several times and record the positions on the paper one by one. Resulting in overlong examination time of the whole examination and easy generation of visual fatigue and hand muscle fatigue of patients. Therefore, the patient will have some errors in marking the observation point.

2. When a Hess screen is inspected, an inspection room is in a dark light environment, an inspector needs to record the position of a green spot on the Hess screen on a recording paper, and certain observation errors exist.

3. The examination results of the patient are respectively drawn on two pieces of result recording paper, so that the electronic filing is inconvenient, and the data of two eyes are not convenient to fuse and compare.

The prerequisite of the Hess screen inspection is that the human eye height is at the same height as the central sighting mark of the Hess screen. However, in the actual examination process, the position of the Hess screen is fixed, and the heights of the examined persons are different, so that the eyeball height of the examined person can be adjusted by adjusting the position of the lower jaw support, but the adjustment range is limited.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present application is to provide an automatic strabismus inspection system for solving at least one of the problems of the prior art.

To achieve the above and other related objects, the present application provides an automatic strabismus inspection system, comprising: the posture fixing piece is provided with a bracket, and a chin rest is fixed on the bracket; the display screen is fixed on the wall surface facing the posture fixing piece, and a sliding rail capable of moving up and down is arranged behind the display screen; a camera is arranged on the display screen; the display screen displays the point light sources according to a plurality of different preset positions on the image of the Hess screen.

In an embodiment of the present application, the camera is used for identifying the eye position of the examinee, so as to drive the slide rail to adjust the height of the display screen, so that the central sighting mark of the display screen is consistent with the eye position of the examinee.

In an embodiment of the present application, the camera is further configured to record and collect coordinates of a center point of a bright spot on a cornea of a detected eye of the detected person and coordinates of a center point of a pupil of the detected person when the detected person looks at the point light source on the display screen, so as to generate the contrast image data.

In an embodiment of the present application, the contrast image data corresponds to a left eye or a right eye respectively; and fusing the contrast image data corresponding to the left eye and the contrast image data corresponding to the right eye to obtain the contrast image data fused with the two eyes.

In an embodiment of the present application, the comparison image data may be connected to the coordinates of the lines of sight of the examinee falling on the display screen corresponding to the light sources of each point for comparison with the grid lines on the image of the Hess screen.

In an embodiment of the present application, the system further includes: a light source controller; the handheld control of the inspected person is used for triggering the switching action of the point light source on the display screen after the inspected person confirms that the point light source on the display screen is observed.

In an embodiment of the present application, a communication manner between the light source controller and the display screen includes: wired or wireless communication; the wireless communication includes: any one of Bluetooth, wifi, infrared light, radio frequency, and NB-IOT.

In summary, the present application provides an automatic strabismus inspection system, the system comprising: the posture fixing piece is provided with a bracket, and a chin rest is fixed on the bracket; the display screen is fixed on the wall surface facing the posture fixing piece, and a sliding rail capable of moving up and down is arranged behind the display screen; a camera is arranged on the display screen; the display screen displays the point light sources according to a plurality of different preset positions on the image of the Hess screen.

Has the following beneficial effects:

the method and the device can effectively improve the accuracy of strabismus examination, save examination time, and simultaneously keep examination data of an examinee in an electronic form, thereby facilitating subsequent disease analysis.

Drawings

Fig. 1 is a schematic structural diagram of an automatic strabismus inspection system according to an embodiment of the present application.

FIG. 2 is a schematic view of a Hess screen image according to an embodiment of the present invention.

Fig. 3 is a schematic view illustrating a scene for identifying the eyes of a subject according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of a model for calculating the gaze coordinate according to an embodiment of the present invention.

FIG. 5A is a schematic diagram illustrating left-eye and right-eye contrast image data according to an embodiment of the present application.

Fig. 5B is a schematic diagram illustrating contrast image data of binocular fusion according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only schematic and illustrate the basic idea of the present application, and although the drawings only show the components related to the present application and are not drawn according to the number, shape and size of the components in actual implementation, the type, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complex.

Throughout the specification, when a part is referred to as being "connected" to another part, this includes not only a case of being "directly connected" but also a case of being "indirectly connected" with another element interposed therebetween. In addition, when a certain part is referred to as "including" a certain component, unless otherwise stated, other components are not excluded, but it means that other components may be included.

The terms first, second, third, etc. are used herein to describe various elements, components, regions, layers and/or sections, but are not limited thereto. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the scope of the present application.

Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," and/or "comprising," when used in this specification, specify the presence of stated features, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, operations, elements, components, items, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions or operations are inherently mutually exclusive in some way.

In order to solve the defects of the existing patient strabismus examination based on the Hess screen, the application provides an automatic strabismus examination system.

Fig. 1 is a schematic structural diagram of an automatic strabismus inspection system according to an embodiment of the present invention. As shown, the automatic strabismus inspection system comprises:

the posture fixing piece 1 is provided with a bracket 11, and a chin rest 12 is fixed on the bracket 11;

the display screen 2 is fixed on the wall surface facing the posture fixing piece 1, and a sliding rail 3 capable of moving up and down is arranged behind the display screen 2; and the display screen 2 is provided with a camera 4.

Preferably, the display screen 2 displays point light sources at a plurality of different positions preset on the Hess screen image. And point light sources corresponding to different positions on the image of the Hess screen are sequentially displayed through the display screen 2.

As shown in fig. 2, a schematic view of a scene shown as a Hess screen image. In this embodiment, the Hess screen image displayed on the display screen 2 forms a curved grid line by a plurality of arcs curved toward the center, and 25 different positions (or eye positions) with central symmetry are selected from the grid line as positions of different point light sources displayed on the display screen 2.

It should be noted that, while the display screen 2 of the present application displays 25 different eye positions in the Hess screen image, the conventional method mainly detects 9 positions on the Hess screen image. Because the camera 4 is adopted for visual field tracking, the precision is much higher than that of the traditional mode that a person to be inspected needs to take a green indicator light or a green pointer to indicate, more eye positions can be selected on a Hess screen image, and the problem that the precision is influenced due to overlarge density is avoided. And this application because detected more eyes position, through subsequent comparison, can more accurate aassessment person's strabismus degree.

Preferably, the camera 4 is used for identifying the eye position of the examinee, so as to drive the slide rail 3 to adjust the height of the display screen 2, so that the central sighting mark of the display screen 2 is consistent with the height of the eye position of the examinee.

In this embodiment, in the conventional practice, since the position of the Hess screen is fixed, the height of the examinee is different, and although the eyeball height of the examinee can be adjusted by adjusting the position of the lower jaw support, the adjustment range is relatively limited. After the preparation work in the embodiment shown in fig. 1 is done, the camera 4 of the display screen 2 can be used for collecting data of the tested eye of the tested person, so as to adjust the height of the display screen 2.

As shown in fig. 3, for example, the tested eye of the examinee is the right eye, the left eye of the examinee is shielded by wearing a green single-sided eye, the inner canthus B and the outer canthus a of the right eye of the examinee are identified by the camera 4 on the display screen 2, as shown in fig. 3, B and a, and A, B points are connected to obtain an AB line segment, the horizontal line of which can be used as the reference height of the eyes of the examinee, and based on this, the central sighting target or the central position of the display screen 2 is adjusted to the height of the AB line segment by the slide rail 3 arranged behind the display screen 2, so as to adjust the relative height of the display screen 2 and the examinee.

In one or more practical embodiments, the pupil position can be identified as the reference height of the examiner's eye, or the upper eyelid and the lower eyelid of the examined eye of the examinee are connected through the middle point of the connecting line to serve as the reference height of the examiner's eye.

Preferably, the camera 4 is further configured to record and collect coordinates of a center point of a bright spot on a cornea of a detected eye of the examinee and coordinates of a center point of a pupil of the examinee when the examinee looks at the point light source on the display screen 2, so as to generate contrast image data.

It should be noted that, because only the red bright light of the point light source is in the examination room, the red bright spot on the cornea of the eye of the examinee can be easily collected by the camera 4.

For example, the coordinates of the center point of the bright spot on the cornea of the tested eye of the tested person can be recorded and collected to further obtain the coordinates of the center point of the curved surface of the cornea of the tested eye of the tested person, thereby realizing data calibration. Furthermore, the coordinate of the central point of the bright spot and the coordinate of the central point of the pupil of the person to be inspected can be combined according to the central point of the curved surface of the cornea of the eye, so as to obtain the sight line coordinate of the sight line of the person to be inspected, which corresponds to the sight line of the person to be inspected and falls on the display screen 2. It should be noted that the manner of obtaining the coordinates may be obtained by means of an auxiliary extension line, which is not the protection focus of the present system, and the present system does not depend on this method.

The system further comprises: a light source controller 5; the handheld control of the examinee is used for triggering the switching action of the point light source on the display screen 2 after the examinee confirms that the point light source on the display screen 2 is observed.

Preferably, the light source controller 5 and the display screen 2 may be in communication connection through wires or wirelessly, such as bluetooth, wifi, infrared light, radio frequency, NB-IOT, and the like.

For example, after the examinee confirms the position of the point light source P1, the camera 4 records a next sight line coordinate point P1^/When the enter key of the handheld light source controller 5 is pressed, the red point light source on the display screen 2 jumps to the next light source point P2, and as shown in fig. 4, the camera 4 continues to record the next sight line coordinate point P2^/And performing the operations one by one until the 25 eye positions of the tested eye on the side are checked, and storing the sight line coordinate point sets of the tested eye corresponding to the 25 eye positions respectively. After the data of the side eye is collected, the patient is prompted to switch the other side eye, the examinee wears the unilateral green glasses on the other side, and the Hess screen image on the display screen 2 restarts to display the point light source once from the first eye position so that the other side eye can continue to examine.

Preferably, the point light source coordinates and the sight line coordinates corresponding to the point light sources at different positions generate contrast image data for evaluating the strabismus degree of the tested eye.

Wherein the contrast image data corresponds to a left eye or a right eye respectively; and fusing the contrast image data corresponding to the left eye and the contrast image data corresponding to the right eye to obtain the contrast image data fused with the two eyes. And in the comparison image data, the sight line coordinates corresponding to the light sources of each point can be connected for comparison with grid lines on the Hess screen image.

In an embodiment of the present application, the contrast image data corresponds to a left eye or a right eye, respectively, as shown in fig. 5A; fusing the contrast image data corresponding to the left eye with the contrast image data corresponding to the right eye to obtain two-eye fused contrast image data, as shown in fig. 5B; and the sight line coordinates corresponding to each point light source can be connected in the comparison image data so as to be compared with the grid lines on the Hess screen image.

For example, the application can evaluate the deviation between the connecting line of the observation point and the normal value of the image of the Hess screen: an inward shift is paralysis of the eye muscles, and an outward shift is overstraining of the eye muscles.

Generally, when there is an eye movement disorder, the contrast image appears to be smaller toward the action of the paralyzed muscle. As the paralyzed eye is gazing, the partner muscles of the paralyzed muscles contract excessively (according to Hering's law). Thus, secondary deflection (which refers to the degree of deflection exhibited when the paralyzed eye is fixated) is greater than primary deflection (which refers to the degree of deflection exhibited when the paralyzed eye is fixated) as exhibited on the Hess screener pattern, the paralyzed eye pattern becomes smaller and the non-paralyzed eye pattern becomes larger. The position with the greatest degree of deviation of the eye position is the place where the paralyzed muscles are located or the place where the limitation of the eyeball movement is obvious.

In one or more embodiments, the automatic strabismus inspection system of the present application is used as follows:

first, it is necessary that the examinee sits on the seat and then fixes the chin on the chin rest 12, and the bracket 11 of the posture fixing member 1 is set to a proper height so that the examinee sits with the chin at a height close to the chin rest 12. The posture fixing member 1 is spaced from the display screen 2 of the wall surface by a certain distance, for example, 50 cm. Preferably, the posture fixing member 1 is directed to the central axis of the display screen 2.

Then, since the eyes of the examinee need to be examined one by one, the examinee needs to open the eye to be examined, wear a green single-sided eye on the eye not to be examined, and hold the screen light source controller 5, so that the preparation work before the examination is completed.

After entering the examination phase, firstly, the camera 4 on the display screen 2 adjusts the height of the display screen 2 through the slide rail 3 by acquiring relevant data (such as the positions of the inner and outer canthus) of the tested eye of the tested patient, so that the central sighting target (or the central position) of the display screen 2 is consistent with the eye height; then, the light source in the examination room is turned off, the display screen 2 displays point light sources (such as red light) at a plurality of different positions (eye positions) preset by the display Hess screen, the examined person looks at the point light sources, the camera 4 collects relevant data (such as bright spots, sight lines, pupil center coordinates and the like falling on the cornea of the examined eye) of the examined person at the moment, and after the examined person confirms that the examined person observes the point light sources through the keys on the light source controller 5, the light source controller 5 sends information to trigger the display screen 2 to display the next point light source. And by analogy, when all the point light sources corresponding to different positions on all the Hess screen images are displayed, the point light sources are restarted for the examination of another eye to be tested.

Finally, after the alternate binocular vision examination is finished, the sight line coordinate of the examinee falling on the display screen 2 is calculated through the relevant data collected by the light sources of all the points, and the examination reports of the left eye and the right eye of the examinee are automatically generated through the comparison with the coordinates of different positions on the Hess screen image, so that the degree of strabismus of the examinee can be evaluated.

Therefore, the system can be automatically checked by a person to be checked, and doctors do not need to record or guide the whole process; secondly, the detected data are all stored in an electronic form, so that the subsequent disease analysis is facilitated; in addition, the accuracy of the strabismus examination is effectively improved, and the examination time is saved. The method and the device can effectively improve the accuracy of strabismus examination, save examination time, and simultaneously keep examination data of an examinee in an electronic form, thereby facilitating subsequent disease analysis.

In summary, the present application provides an automatic strabismus inspection system. The system comprises: the posture fixing piece is provided with a bracket, and a chin rest is fixed on the bracket; the display screen is fixed on the wall surface facing the posture fixing piece, and a sliding rail capable of moving up and down is arranged behind the display screen; a camera is arranged on the display screen; the display screen displays the point light sources according to a plurality of different preset positions on the image of the Hess screen.

The application effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.

Claims (7)

1. An automated strabismus inspection system, the system comprising:

the posture fixing piece is provided with a bracket, and a chin rest is fixed on the bracket;

the display screen is fixed on the wall surface facing the posture fixing piece, and a sliding rail capable of moving up and down is arranged behind the display screen; a camera is arranged on the display screen; the display screen displays the point light sources according to a plurality of different preset positions on the image of the Hess screen.

2. The system according to claim 1, wherein the camera is used for identifying the eye position of the examinee, so that the slide rail is driven to adjust the height of the display screen, and the central sighting mark of the display screen is consistent with the height of the eye position of the examinee.

3. The system of claim 1, wherein the camera is further configured to record and collect coordinates of a center point of a bright spot falling on a cornea of a tested eye of the tested person and coordinates of a pupil center of the tested person when the tested person looks at the point light source on the display screen, so as to generate the contrast image data.

4. The system of claim 3, wherein the contrast image data corresponds to a left eye or a right eye, respectively; and fusing the contrast image data corresponding to the left eye and the contrast image data corresponding to the right eye to obtain the contrast image data fused with the two eyes.

5. The system according to claim 4, wherein the comparative image data is connected with the line-of-sight coordinates of the examinee's line of sight corresponding to each point light source falling on the display screen for comparison with the grid lines on the Hess screen image.

6. The system of claim 1, further comprising: a light source controller; the handheld control of the inspected person is used for triggering the switching action of the point light source on the display screen after the inspected person confirms that the point light source on the display screen is observed.

7. The system of claim 6, wherein the light source controller in communication with the display screen comprises: wired or wireless communication; the wireless communication includes: any one of Bluetooth, wifi, infrared light, radio frequency, and NB-IOT.

Images