A myopia screening device

Abstract

This invention provides a myopia screening device. The first end of the housing is designated as the detection end for testing the subject's eyes. A visual target screen, a screening camera, and an optical path assembly are all housed within the housing. The visual target screen is located on one side wall of the housing, the optical path assembly is positioned between the detection end and the visual target screen, and the screening camera is located at the second end of the housing. The screening camera captures a light and shadow image of the subject's pupil. A processor processes and analyzes the light and shadow image captured by the screening camera. An input device communicates with the processor and inputs the image seen by the subject on the visual target screen into the processor. This invention enables not only refractive error testing but also visual acuity testing and color blindness / color weakness testing. Furthermore, this invention can estimate the subject's visual acuity based on the refractive error test results, generate a corresponding estimated visual target based on the estimated visual acuity, and quickly complete the visual acuity test, effectively shortening the visual acuity screening time.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically a myopia screening device. Background Technology

[0002] Currently, myopia screening consists of two parts: refractive error measurement and visual acuity testing. Refractive error measurement is usually performed by computer refraction or visual acuity screening instrument, while visual acuity testing is performed by visual acuity chart. Therefore, myopia screening currently takes a relatively long time. Utility Model Content

[0003] In view of this, the present invention provides a myopia screening device to solve the problem that myopia screening currently requires a long time.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A myopia screening device includes: a housing, a visual target screen, a screening camera, a processor, an optical path assembly, and an input device;

[0006] The first end of the housing is the detection end used to detect the subject's eyes;

[0007] The visual target screen, screening camera, and optical path components are all housed within the casing;

[0008] The target screen is mounted on one side wall of the housing;

[0009] The optical path component is located between the detection end and the optotype screen. The optical path component is used to enable the subject's eyes to see the image on the optotype screen, which includes the V-shaped fixation point, letter optotypes, and color blindness / color weakness images.

[0010] The screening camera is located at the second end of the housing. The screening camera is used to emit an infrared light source to the eyes of the examinee and to capture the light and shadow image of the examinee's pupils.

[0011] The processor is used to process and analyze the light and shadow images captured by the screening camera, and to determine the refractive state, pupil diameter, interpupillary distance and eye position information of the examinee's eyes;

[0012] The input device is connected to the processor and is used to input the image seen by the subject on the visual target screen into the processor.

[0013] Preferably, the optical path component includes: a reflector;

[0014] The reflector is located between the target screen and the opposite side wall of the housing on which the target screen is mounted.

[0015] Preferably, it also includes: a support frame;

[0016] The housing is rotatably mounted on the support frame.

[0017] Preferably, the bracket includes: a base and a support portion;

[0018] The bottom consists of a first rod, a second rod, and a third rod, which are connected in sequence to form a U-shaped structure;

[0019] The support includes a first support rod and a second support rod. The first end of the first support rod and the first end of the second support rod are set at a preset angle at both ends of the U-shaped structure. The second end of the first support rod and the second end of the second support rod are rotatably connected to the two sides of the housing.

[0020] Preferably, it also includes: a wireless data receiver;

[0021] The wireless data receiver is located in the housing and is electrically connected to the processor. The wireless data receiver is used for wireless communication with input devices.

[0022] Preferably, the wireless data receiver is Bluetooth.

[0023] Preferably, the second end of the housing has multiple heat dissipation holes.

[0024] Preferably, the inner wall of the housing is provided with a black light-blocking material.

[0025] Preferably, the housing includes: a first cylindrical body, a second cylindrical body, a third cylindrical body, and a rear cover;

[0026] One end of the first cylinder is connected to one end of the second cylinder;

[0027] The other end of the second cylinder is connected to one end of the third cylinder, and the rear cover is located at the other end of the third cylinder;

[0028] The target screen, screening camera, processor, and optical path components are located in the third cylinder.

[0029] Based on the above-described myopia screening device provided by this utility model, the first end of the housing is configured as a detection end for detecting the subject's eyes. The optotype screen, screening camera, and optical path assembly are all housed within the housing. The optotype screen is located on one side wall of the housing, and the optical path assembly is positioned between the detection end and the optotype screen. The optical path assembly enables the subject's eyes to see the image on the optotype screen. The screening camera is located at the second end of the housing. The screening camera emits infrared light to the subject's eyes and captures the light and shadow images of the subject's pupils. A processor processes and analyzes the light and shadow images captured by the screening camera to determine the refractive state, pupil diameter, interpupillary distance, and eye position information of the subject's eyes. An input device communicates with the processor and inputs the image seen by the subject on the optotype screen into the processor. This disclosed myopia screening device can not only perform refractive error detection but also visual acuity and color blindness detection. Furthermore, this application can predict the subject's visual acuity based on the refractive error detection results, generate corresponding predicted optotypes based on the predicted visual acuity, and quickly complete the visual acuity test, effectively shortening the visual acuity screening time. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 A schematic diagram of a myopia screening device provided for an embodiment of this utility model;

[0032] Figure 2 A cross-sectional view of the third cylinder provided in an embodiment of this utility model;

[0033] Figure 3 A cross-sectional view of the third cylinder provided in an embodiment of this utility model from another angle.

[0034] The components include: shell 1, first cylinder 11, second cylinder 12, third cylinder 13, rear cover 14, visual target screen 2, screening camera 3, optical path assembly 4, support frame 5, bottom 51, and support part 52. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] This utility model embodiment provides a myopia screening device, see [link]. Figure 1 and combined Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of a myopia screening device, which includes: a housing 1, a visual target screen 2, a screening camera 3, a processor, an optical path assembly 4, and an input device;

[0037] The first end of the housing 1 is a detection end used to detect the subject's eyes;

[0038] The visual target screen 2, the screening camera 3, and the optical path assembly 4 are all housed inside the housing 1;

[0039] The target screen 2 is disposed on one side wall of the housing 1;

[0040] The optical path component 4 is disposed between the detection end and the optotype screen 2. The optical path component 4 is used to enable the subject's eyes to see the image on the optotype screen 2, wherein the image includes a V-shaped fixation point, letter optotypes and color blindness / color weakness images.

[0041] The screening camera 3 is located at the second end of the housing 1. The screening camera 3 is used to emit infrared light sources to the eyes of the examinee and capture light and shadow images of the pupils of the examinee.

[0042] The processor is used to process and analyze the light and shadow images captured by the screening camera 3, and to determine the refractive state, pupil diameter, pupillary distance and eye position information of the examinee's eyes;

[0043] The input device is connected to the processor and is used to input the image seen by the subject on the visual target screen 2 into the processor.

[0044] It should be noted that the screening camera 3 is a device that emits infrared light sources to the examinee's eyes. When the infrared light source is projected onto the examinee's retina, the light reflected back from the retina presents different patterns under different refractive states. At this time, the screening camera 3 captures the light and shadow image of the examinee's pupils. Then, the processor processes and analyzes the light and shadow image captured by the screening camera 3 to obtain the examinee's corresponding refractive data such as spherical lens, cylindrical lens, and axis. This allows the doctor to determine the refractive state, pupil diameter, pupillary distance, and eye position information of the examinee's eyes, facilitating the doctor's rapid screening and comprehensive understanding of the examinee's visual development. Specifically, after the examinee completes the refractive test, the processor generates an estimated visual acuity value based on the refractive data. The estimated visual acuity value corresponds to an estimated optotype. Then, the corresponding estimated optotype (E optotype or C optotype) is displayed on the optotype screen 2. Finally, the doctor inputs the corresponding optotype into the input device based on the examinee's feedback. The processor outputs the examinee's visual acuity based on the input structure, thus completing the visual acuity test.

[0045] In this application, when conducting vision tests, if the test subject's feedback is the same as the visual target, the visual target screen 2 will be controlled to display a smaller visual target; if the test subject's feedback is different from the visual target, the visual target screen 2 will be controlled to display a larger visual target. This process can be repeated to complete the test subject's vision test.

[0046] When conducting color blindness and color weakness tests on examinees, this application can play color blindness and color weakness images through the visual target screen 2. Then, the doctor can obtain the examinee's test results by comparing the examinee's feedback results with the color blindness and color weakness images.

[0047] In addition, this application also allows doctors to manually operate the optotype screen 2 to display optotypes of different sizes to conduct vision tests on the examinee.

[0048] It is worth noting that when the myopia screening device of this application measures the refractive power of the examinee, it can first control the optotype screen 2 to display three light spots to form a V-shaped fixation point, then have the examinee's eyes fixate on the V-shaped fixation point, and then emit an infrared light source to the examinee's eyes through the screening camera 3 and capture the light and shadow image of the examinee's pupils.

[0049] It should also be noted that the visual target screen 2 displays three light spots forming a V-shaped fixation point, which can provide the examinee with a gaze target, thereby avoiding random eye movements and improving the speed and success rate of refractive screening.

[0050] The housing 1 of this application has a channel, in which the visual target screen 2, the screening camera 3 and the optical path assembly 4 are all disposed. The channel is connected to the first end of the housing 1, so the examinee can see the image displayed on the visual target screen 2 at the first end.

[0051] This invention sets the first end of the housing 1 as the detection end for detecting the eyes of the examinee. The visual target screen 2, the screening camera 3, and the optical path assembly 4 are all disposed inside the housing 1. The visual target screen 2 is disposed on one side wall of the housing 1. The optical path assembly 4 is disposed between the detection end and the visual target screen 2. The optical path assembly 4 is used to enable the examinee's eyes to see the image on the visual target screen 2. The screening camera 3 is disposed at the second end of the housing 1. The screening camera 3 is used to emit infrared light sources to the examinee's eyes and capture the light and shadow image of the examinee's pupils. The light and shadow image captured by the screening camera 3 is processed and analyzed by the processor to determine the refractive state, pupil diameter, pupillary distance, and eye position information of the examinee's eyes. The input device is connected to the processor and inputs the image seen by the examinee on the visual target screen 2 into the processor. The aforementioned myopia screening device can not only perform refractive error testing on patients, but also visual acuity testing and color weakness / color blindness testing. Furthermore, this application can predict the visual acuity of the examinee based on the results of the refractive error testing, generate corresponding predicted optotypes based on the predicted visual acuity, and quickly complete the visual acuity test, effectively shortening the time for visual acuity screening.

[0052] Specifically, optical path component 4 includes: a reflector;

[0053] The reflector is located between the target screen 2 and the other side wall of the housing 1 opposite to the side wall on which the target screen 2 is mounted.

[0054] It should be noted that the reflector is positioned between the visual target screen 2 and the other side wall of the housing 1 opposite to the side wall on which the visual target screen 2 is installed, so that the examinee can see the content displayed in the visual target screen 2 through the reflector, and the screening camera 3 can also capture the light and shadow image of the examinee's pupil.

[0055] It is worth noting that the reflector in this application is located between the detection end and the screening camera 3. The examinee can see the image displayed on the visual target screen 2 through the reflector, but cannot see the screening camera 3 through the reflector. The screening camera 3 can capture the light and shadow image of the examinee's pupil through the reflector.

[0056] Furthermore, the myopia screening device also includes: a support frame 5;

[0057] The housing 1 is rotatably mounted on the support frame 5.

[0058] It should be noted that by setting up the support frame 5 and rotatably mounting the housing 1 on the support frame 5, the myopia screening device can adjust the height of the detection end by rotating the housing 1 to meet the detection needs of subjects of different heights.

[0059] Specifically, the bracket includes: a bottom 51 and a support 52;

[0060] The bottom 51 includes a first rod, a second rod, and a third rod, which are connected in sequence to form a U-shaped structure;

[0061] The support part 52 includes a first support rod and a second support rod. The first end of the first support rod and the first end of the second support rod are set at a preset angle at both ends of the U-shaped structure. The second end of the first support rod and the second end of the second support rod are rotatably connected to the two sides of the housing 1.

[0062] It should be noted that the first rod, the second rod, and the third rod are connected in sequence to form a U-shaped structure, and the first end of the first support rod and the first end of the second support rod are set at a preset angle at both ends of the U-shaped structure. The second end of the first support rod and the second end of the second support rod are rotatably connected to the two sides of the housing 1. This structure is simple and allows the examinee to adjust the height of the detection end of the myopia screening device according to their own height requirements.

[0063] Furthermore, the myopia screening device also includes: a wireless data receiver;

[0064] The wireless data receiver is located in housing 1 and is electrically connected to the processor. The wireless data receiver is used for wireless communication with input devices.

[0065] It should be noted that by setting a wireless data receiver for wireless communication with the input device in the housing 1, and electrically connecting the wireless data receiver to the processor, the input device can wirelessly connect with the wireless data receiver and transmit data to the wireless data receiver, thereby transmitting the data input by the examinee to the processor.

[0066] Specifically, the wireless data receiver uses Bluetooth.

[0067] It should be noted that the wireless data receiver can be Bluetooth or other wireless receiving modules (such as wireless networks, 5G and other wireless communication modules), and those skilled in the art can choose according to their needs.

[0068] Specifically, the second end of the housing 1 has multiple heat dissipation holes.

[0069] It should be noted that by opening multiple heat dissipation holes at the second end of the housing 1, heat dissipation of the visual target screen 2 and the screening camera 3 can be achieved in a timely manner, thereby extending the service life of the visual target screen 2 and the screening camera 3.

[0070] Furthermore, the inner wall of the housing 1 is provided with a black light-blocking material.

[0071] It should be noted that the black light-blocking material on the inner wall of the housing 1 ensures that the housing 1 is in a dark room environment, effectively preventing the external environment from affecting the test results of refractive error detection, visual acuity detection, and color weakness and color blindness detection.

[0072] Specifically, the shell 1 includes: a first cylinder 11, a second cylinder 12, a third cylinder 13, and a rear cover 14;

[0073] One end of the first cylinder 11 is connected to one end of the second cylinder 12;

[0074] The other end of the second cylinder 12 is connected to one end of the third cylinder 13, and the rear cover 14 is disposed at the other end of the third cylinder 13;

[0075] The visual target screen 2, screening camera 3, processor and optical path assembly 4 are located in the third cylinder 13.

[0076] It should be noted that the housing 1 is configured as a first cylinder 11, a second cylinder 12, a third cylinder 13 and a rear cover 14, with one end of the first cylinder 11 connected to one end of the second cylinder 12, the other end of the second cylinder 12 connected to one end of the third cylinder 13, and the rear cover 14 located at the other end of the third cylinder 13. The visual target screen 2, the screening camera 3, the processor and the optical path assembly 4 are located in the third cylinder 13, which not only reduces the difficulty of production, but also facilitates transportation.

[0077] Preferably, the first cylinder 11, the second cylinder 12, the third cylinder 13 and the rear cover 14 are all connected by snap-fit.

[0078] It should be noted that the first cylinder 11, the second cylinder 12, the third cylinder 13 and the rear cover 14 can all be connected by snap-fit, or they can be connected by other connection methods. Those skilled in the art can choose according to their needs.

[0079] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A myopia screening device, characterized in that, include: Housing, visual target screen, screening camera, processor, optical path components, and input devices; The first end of the housing is a detection end used to detect the subject's eyes; The visual target screen, the screening camera, and the optical path assembly are all housed within the housing; The target screen is disposed on one side wall of the housing; The optical path component is disposed between the detection end and the optotype screen. The optical path component is used to enable the subject's eyes to see the image on the optotype screen, wherein the image includes a V-shaped fixation point, letter optotypes, and color blindness / color weakness images. The screening camera is located at the second end of the housing. The screening camera is used to emit an infrared light source to the eyes of the subject and to capture the light and shadow image of the subject's pupils. The processor is used to process and analyze the light and shadow images captured by the screening camera, and to determine the refractive state, pupil diameter, interpupillary distance and eye position information of the examinee's eyes; The input device is communicatively connected to the processor and is used to input the image seen by the subject on the visual target screen into the processor.

2. The myopia screening device according to claim 1, characterized in that, The optical path component includes: a reflector; The reflector is located between the target screen and the other side wall of the housing opposite to the side wall on which the target screen is mounted.

3. The myopia screening device according to claim 1, characterized in that, Also includes: Support frame; The housing is rotatably mounted on the support frame.

4. The myopia screening device according to claim 3, characterized in that, The bracket includes: a bottom and a support portion; The bottom includes a first rod, a second rod, and a third rod, which are connected in sequence to form a U-shaped structure; The support includes a first support rod and a second support rod. The first end of the first support rod and the first end of the second support rod are set at a preset angle at both ends of the U-shaped structure. The second end of the first support rod and the second end of the second support rod are rotatably connected to both sides of the housing.

5. The myopia screening device according to claim 1, characterized in that, Also includes: Wireless data receiver; The wireless data receiver is disposed in the housing and electrically connected to the processor. The wireless data receiver is used for wireless communication with the input device.

6. The myopia screening device according to claim 5, characterized in that, The wireless data receiver is Bluetooth.

7. The myopia screening device according to claim 1, characterized in that, The second end of the housing has multiple heat dissipation holes.

8. The myopia screening device according to claim 1, characterized in that, The inner wall of the housing is lined with a black light-blocking material.

9. The myopia screening device according to claim 1, characterized in that, The housing includes: a first cylindrical body, a second cylindrical body, a third cylindrical body, and a rear cover; One end of the first cylinder is connected to one end of the second cylinder; The other end of the second cylinder is connected to one end of the third cylinder, and the rear cover is disposed at the other end of the third cylinder; The visual target screen, the screening camera, the processor, and the optical path assembly are disposed in the third cylinder.

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