CN212729759U

CN212729759U - Dynamic vision detection system

Info

Publication number: CN212729759U
Application number: CN202020761689.0U
Authority: CN
Inventors: 王岳鑫; 李学民
Original assignee: Peking University Third Hospital Peking University Third Clinical Medical College
Current assignee: Peking University Third Hospital Peking University Third Clinical Medical College
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2021-03-19
Anticipated expiration: 2030-05-09

Abstract

The utility model provides a dynamic vision detection system, which comprises a display unit, a sighting mark control unit, an information acquisition unit, a data processing unit and a data storage unit; the display unit, the sighting target control unit and the information acquisition unit are connected with the data processing unit; the data processing unit is connected with the data storage unit. The utility model provides a developments eyesight detecting system can the automatic adjustment look the size of target and show on the display element, can adjust the switching to the target as required in the testing process, and the testing result is formed to the testing data after data processing unit handles to the storage is in data storage unit. The utility model discloses a developments visual acuity test system can control the size and the speed of sighting target to convenient, swift realization developments visual assay.

Description

Dynamic vision detection system

Technical Field

The utility model relates to the field of medical equipment, concretely relates to developments eyesight detecting system.

Background

Dynamic vision refers to the ability of an observer to discern the details of an object with which there is relative motion, while dynamic vision refers to the smallest viewing angle of a motion state object that it is able to discern, i.e., a quantitative assessment of dynamic vision. Currently, the evaluation of vision in ophthalmic clinical practice is limited to static vision, while less attention is paid to dynamic vision, which is actually closely related to our daily life, including driving, sports, etc. With the continuous progress of medical technology and the improvement of living standard of people, the evaluation of simple static vision is far from enough, and dynamic vision evaluation is also needed to be applied to know the living ability of a detected object.

In addition, because the generation of dynamic vision is closely related to the M ganglion cell pathway in the brain, and different ophthalmic lesions can damage different ganglion cells, the evaluation result of the dynamic vision can more effectively perform more specific early diagnosis aiming at some ophthalmic diseases compared with the static vision, thereby being beneficial to improving the prognosis of patients.

However, the current dynamic vision test is mainly carried out by driving the physical visual chart through the motor, the testing device fixes different standard visual charts on the bracket, and then the bracket is driven to move horizontally through the rotating motor, thereby realizing the horizontal movement of the visual chart. However, the device has the problems of limited moving speed of the sighting target, inconvenient selection of the size of the sighting target, complicated operation and recording process and the like, and is difficult to meet the actual detection requirement.

SUMMERY OF THE UTILITY MODEL

In view of the various problems existing in the prior art, the utility model provides a dynamic vision testing system which can be widely applied in the clinical process of ophthalmology and is convenient to operate. Compared with the prior dynamic vision detection device, the system can adapt to different detection distances, is convenient to operate, and has a standard detection operation flow, so that the detection is easier to carry out, and the accuracy is improved. The specific technical scheme is as follows:

a dynamic vision testing system, comprising: the display unit is used for displaying the dynamic sighting mark; the sighting target control unit is used for receiving the control instruction and sending the control instruction to the data processing unit so as to control the dynamic sighting target displayed on the display unit; the information acquisition unit is used for acquiring detection data; the data processing unit is used for processing data; and a data storage unit; the display unit, the sighting target control unit and the information acquisition unit are connected with the data processing unit; the data processing unit is connected with the data storage unit.

Further, the display unit is a liquid crystal display unit or an optical projection display unit. The display unit is used for displaying the dynamic sighting marks, and can also execute operations of displaying an interactive interface, outputting a detection result and the like according to actual needs.

Further, the optotype control unit may be capable of controlling at least one of a shape, a size, a speed, a direction, and a color of the dynamic optotype. The shape of the sighting mark can be a letter E or a letter C with openings facing different directions, and can also be other letters or symbols, such as 'H', 'O', 'V', 'T' and the like; in the detection process, the displayed dynamic sighting target can be controlled and switched in real time through the sighting target control unit. Preferably, the visual target control unit may have a plurality of keys or adjusting knobs for controlling and switching the shape, size, speed, direction and color of the visual target according to an externally input control command.

Furthermore, the information acquisition unit is provided with an information input module for inputting detection data. The information input module can be an information input device such as a keyboard, a touch screen and the like; the detection data comprises at least one of detection distance, basic information of the detection object, feedback information of the detection object to the dynamic sighting target and the like. Wherein the detection distance is an optical linear distance between the eye to be detected and the display unit.

Furthermore, the information acquisition unit is provided with an information identification module for automatically identifying and acquiring the detection data. Specifically, the information identification module comprises at least one of a distance measurement component, an image identification component and a sound identification component; the distance measurement component can automatically identify and acquire the detection distance, and the image identification component and the voice identification component can identify and acquire feedback information of the detection object to the dynamic sighting target according to the image and the voice of the detection object respectively.

Furthermore, the dynamic vision detection system also comprises a result printing unit, wherein the result printing unit is connected with the data processing unit and can print and output a final detection result.

Further, the dynamic vision detection system is integrally arranged. Through setting up each unit integration with dynamic eyesight detecting system, can improve the compactness and the convenience of equipment, be favorable to popularizing the detection of dynamic eyesight.

The utility model discloses compare with current developments optometry device, have following beneficial effect:

(1) the system can adjust the size of the sighting target and the movement speed of the sighting target according to the detection distance, is not limited by the detection distance, and widens the application range; the system can adjust the size and the moving speed of the cursor according to the width and the resolution of the screen used for testing, and is not limited by the screen.

(2) The system can rapidly control and switch the sighting target in the detection process, and the test process is more flexible;

(3) the system can automatically record and process the detection data and can quickly and accurately obtain the detection result.

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 embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of a dynamic vision testing system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an embodiment of the present invention showing the size of the optotype;

FIG. 3 is a schematic diagram illustrating the speed of the optotype in an embodiment of the present invention;

fig. 4 is an interactive interface displayed in an embodiment of the present invention;

fig. 5 is a diagram illustrating a dynamic sighting mark according to an embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Fig. 1 is a schematic diagram of an embodiment of the present invention, and as shown in fig. 1, the dynamic vision testing system includes: a display unit 1 for displaying a dynamic optotype; the sighting target control unit 2 is used for receiving the control instruction and sending the control instruction to the data processing unit so as to control the dynamic sighting target displayed on the display unit; the information acquisition unit 3 is used for acquiring detection data; the data processing unit 4 is used for processing the control instruction received by the sighting target control unit and the detection data acquired by the information acquisition unit; and a data storage unit 5; the display unit 1, the sighting target control unit 2 and the information acquisition unit 3 are connected with the data processing unit 4; the data processing unit 4 is connected with the data storage unit 5; the dynamic vision testing system also comprises a result printing unit 6, and the result printing unit 6 is connected with the data processing unit 4 and used for printing and outputting the final testing result.

The display unit 1 is a liquid crystal display unit for displaying a dynamic sighting mark moving horizontally.

The dynamic sighting target is an E-shaped sighting target in an international standard visual chart, the color of a letter E is black, the background is white, the contrast is 95%, the width of each line is the same, and the width of a gap between the lines is the same as that of the lines.

The size of the optotype is expressed in decimal notation. The decimal expression method is designed according to the visual angle principle of the international standard visual chart, namely the size of the displayed visual target corresponds to the size of the visual angle formed under the detection distance. As shown in fig. 2, for a visual target having a certain decimal a, the viewing angle θ 1 corresponding to the line width is 1/(60 × a) °, and the viewing angle θ 2 corresponding to the entire visual target is 5/(60 × a) °, and if the detected distance L, the display screen width W, and the resolution of the display screen are obtained by the information acquisition unit 3, the actual size of the visual target at the distance should be Pix pixel values by conversion.

The moving speed of the optotype is in units of view angle/second, i.e., the view angle at which the optotype moves in unit time. As shown in fig. 3, if the moving angle of the optotype in the unit time along the horizontal direction is ∈, if the detection distance L, the display screen width W, and the resolution of the display screen are obtained by the information acquisition unit 3, the actual distance of translation of the optotype in the unit time should be Pix pixel values through conversion; preferably, as shown in fig. 4, the information acquisition unit 3 is used for inputting data such as the detection distance by the user through an interactive interface.

The optotype control unit 2 includes a plurality of control keys. In the detection process, a user can press corresponding control keys, including a visual target selection key and a visual target parameter switching key. Pressing the optotype selection key to cause the optotype display unit 1 to display "E" optotypes (up/down/left/right) oriented in a specific direction; and pressing a sighting target parameter switching key to quickly switch the size and the moving speed of the dynamic sighting target according to a preset mode. Preferably, as shown in fig. 5, the current size and moving speed of the dynamic optotype may be displayed on a display unit for the user to record.

The information acquisition unit 3 has an information entry module and an information identification module. Through an information entry module, such as an information entry device like a keyboard, a touch screen, etc., a user can enter information through an interactive interface, as shown in fig. 4; the input information comprises tested information, a testing distance and a screen width, and the information recognition module is provided with an image recognition component and/or a sound recognition component and can recognize the action and the voice of the detection object, so that the feedback information of the detection object to the dynamic sighting target is obtained.

The data processing unit 4 is capable of processing data. Specifically, the data processing unit 4 can calculate the actual pixel value of the optotype and the pixel value of the movement per second through a formula according to the screen width and the test distance acquired by the information acquisition unit 3, and the set size and the set movement speed of the optotype, so that the corresponding optotype is displayed on the display unit 1; the data processing unit 4 can also directly calculate the detection result, that is, the dynamic vision evaluation result of the detection object according to the preset formula according to the displayed sighting target and the feedback information of the detection object.

The data storage unit 5 and the result printing unit 6 can store and output the detection results. In some cases, the result printing unit 6 may be omitted and the detection result may be displayed directly by the display unit 1.

The various units of the dynamic vision detection system may be separate from one another, but one or more of the various units may also be integrally disposed for reasons of device compactness and manufacturing cost. Preferably, the dynamic vision testing system is integrated.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A dynamic vision testing system, comprising:

the display unit is used for displaying the dynamic sighting mark;

the sighting target control unit is used for receiving the control instruction and sending the control instruction to the data processing unit so as to control the dynamic sighting target displayed on the display unit;

the information acquisition unit is used for acquiring detection data;

the data processing unit is used for processing data; and

a data storage unit;

the display unit, the sighting target control unit and the information acquisition unit are connected with the data processing unit; the data processing unit is connected with the data storage unit.

2. The dynamic vision detection system of claim 1, wherein the display unit is a liquid crystal display unit or an optical projection display unit.

3. The dynamic vision detection system of claim 1, wherein at least one of a shape, size, speed, direction, and color of the dynamic optotype can be controlled by the optotype control unit.

4. The dynamic vision inspection system of claim 1, wherein the information acquisition unit has an information entry module for entering inspection data.

5. The dynamic vision inspection system of claim 1, wherein the information collection unit has an information recognition module for automatically recognizing the acquired inspection data.

6. The dynamic vision detection system of claim 5, wherein the information recognition module includes at least one of a ranging component, an image recognition component, and a sound recognition component.

7. The dynamic vision detection system of claim 1, further comprising a result printing unit, the result printing unit coupled to the data processing unit.

8. The dynamic vision detection system of any one of claims 1-7, wherein the dynamic vision detection system is integrally disposed.