Retinoscopy device and system

Abstract

The embodiment of the present application discloses a retinoscopy optometry device and system. The retinoscopy optometry device comprises: an eyepiece, an eyepiece adjustment device, a retinoscopy mirror, a camera and a controller; the camera is arranged on the retinoscopy hole of the retinoscopy mirror, the camera is used to obtain the retinoscopy optometry image of the inspected eye, and the camera is connected to the controller by signal; the eyepiece adjustment device is connected to the controller by signal, and the controller is used to control the eyepiece adjustment device to adjust at least one parameter of the eyepiece according to the retinoscopy optometry image.

Description

Technical Field

[0001] The present application relates to the field of optometry equipment, and in particular to a retinoscopy optometry equipment and system. Background Art

[0002] Retinoscopy is an optometry method that uses the brightness and movement of images formed by light reflected from the retina to determine the refractive state (emmetropia, myopia, hyperopia and astigmatism). Its basic principle is to find the far point of the eye to be examined and correct the far point to the peephole of the retinoscope. The refractive state of the eye to be examined is determined by observing the direction, speed, brightness and shape of the reflected light. Retinoscopy is a commonly used clinical ophthalmology and optometry examination method for objectively examining the refractive state of the human eye, and is also an effective means of examining refractive errors for special groups. Summary of the invention

[0003] One of the embodiments of the present application provides a retinoscopy device, comprising: an eyepiece, an eyepiece adjustment device, a retinoscope, a camera and a controller; the camera is arranged on the retinoscopy hole of the retinoscope, the camera is used to obtain a retinoscopy image of an examined eye, and the camera is signal-connected to the controller; the eyepiece adjustment device is signal-connected to the controller, and the controller is used to control the eyepiece adjustment device to adjust at least one parameter of the eyepiece according to the retinoscopy image.

[0004] In some embodiments, the retinoscopy optometry device further comprises a sight tube, and the eyepiece, the eyepiece adjustment device and the retinoscope are all connected to the sight tube.

[0005] In some embodiments, the distance between the eyepiece and the retinoscope is 0.5m, 0.67m or 1m.

[0006] In some embodiments, the at least one parameter of the eyepiece comprises at least one of the following parameters: a diopter, an astigmatism power, and an astigmatism axis of the eyepiece.

[0007] In some embodiments, the retinoscope comprises a strip light retinoscope or a spot light retinoscope.

[0008] In some embodiments, the retinoscope is signal-connected to the controller; the controller is further used to control the movement and / or rotation of the light emitted by the retinoscope.

[0009] In some embodiments, the retinoscope includes a light source and a reflector.

[0010] In some embodiments, the retinoscope includes a screen capable of emitting light.

[0011] In some embodiments, the retinoscopy device further includes an information display screen, and the information display screen is used to display the retinoscopy image.

[0012] In some embodiments, the retinoscopy device further includes a control device; the examiner can control the eyepiece adjustment device to adjust the diopter of the eyepiece through the control device.

[0013] In some embodiments, the retinoscopy optometry device includes two eyepieces, two retinoscopes and two cameras; the eyepiece adjustment device can adjust at least one parameter of the two eyepieces respectively; each eyepiece corresponds to a retinoscope and a camera; the retinoscopy optometry device can perform retinoscopy on both eyes of a user at the same time.

[0014] In some embodiments, the retinoscopy optometry device further comprises a sight tube, wherein the sight tube comprises a partition, and the partition is used to separate the optometry areas of the two eyes.

[0015] One of the embodiments of the present application provides a retinoscopy system, which uses the retinoscopy device as described in any of the embodiments of the present application to perform optometry, and the system includes: an image acquisition module, a state determination module and an adjustment module; the image acquisition module is used to acquire the retinoscopy image taken by a camera; the state determination module is used to determine the state of the examined eye according to the retinoscopy image; the adjustment module is used to control the eyepiece adjustment device to adjust at least one parameter of the eyepiece according to the state of the examined eye.

[0016] In some embodiments, the retinoscopy optometry system further includes a retinoscope control module; the retinoscope control module is used to control the movement and / or rotation of the light emitted by the retinoscope.

[0017] In some embodiments, the state determination module includes a refractive state determination unit, and the adjustment module includes a refractive power adjustment unit; the refractive state determination unit is used to determine the refractive state of the examined eye according to the retinoscopy image; the refractive power adjustment unit is used to control the eyepiece adjustment device to adjust the refractive power of the eyepiece according to the refractive state of the examined eye.

[0018] In some embodiments, the state determination module includes an astigmatism state determination unit, and the adjustment module includes an astigmatism adjustment unit; the astigmatism state determination unit is used to determine the astigmatism state of the examined eye according to the retinoscopy image; the astigmatism adjustment unit is used to control the eyepiece adjustment device to adjust the astigmatism degree and / or astigmatism axis of the eyepiece according to the astigmatism state of the examined eye. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present application will be further described in the form of exemplary embodiments, which will be described in detail by way of the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0020] Figure 1 is a schematic diagram of the structure of a retinoscopy optometry device according to some embodiments of the present application;

[0021] Figure 2 is an exemplary flow chart of performing optometry according to the retinoscopy optometry device shown in some embodiments of the present application;

[0022] Figure 3 It is a module diagram of a retinoscopy system according to some embodiments of the present application. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0024] It should be understood that the "system", "device", "unit" and / or "module" used herein are a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0025] Flowcharts are used in the present application to illustrate the operations performed by the system according to the embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, the various steps may be processed in reverse order or simultaneously. At the same time, other operations may also be added to these processes, or one or more operations may be removed from these processes.

[0026] Figure 1 1 is a schematic diagram of the structure of the retinoscopy optometry device according to some embodiments of the present application. Figure 1 The retinoscopy optometry device involved in this application is introduced. It should be noted that: Figure 1 This is only an example and does not limit the specific shape and structure of the retinoscopy device.

[0027] like Figure 1 As shown, the retinoscopy optometry device 100 may include an eyepiece 110, an eyepiece adjustment device 120, a retinoscope 140, a camera 150, and a controller 160. In some embodiments, the retinoscopy optometry device may also include a viewing tube 130, an information display screen 170, a subject's head fixing device 190, etc. or any combination thereof.

[0028] like Figure 1As shown, the eyepiece 110 may include lenses with different diopters and different astigmatism. When performing retinoscopy, the eye 180 to be examined may be close to the eyepiece 110 for examination. The eyepiece 110 may be adjusted by the eyepiece adjustment device 120.

[0029] In some embodiments, the eyepiece adjustment device 120 can be used to adjust the diopter of the eyepiece 110. In some embodiments, the eyepiece adjustment device 120 can include at least one convex lens combination box and / or at least one concave lens combination box. In some embodiments, the convex lens combination box and / or the concave lens combination box can include at least one lens disk. The lens disk can be composed of lenses of different degrees installed on a compass that can rotate around the central axis according to a certain rule. In some embodiments, the diopter adjustment range of the lens disk can be 0D-±20.75D. In some embodiments, lenses of different degrees can be arranged according to the degree size in a gradient of 0.25D to form a lens disk. For example, lenses with degrees of -4.0D, -3.75D, ..., -2.25D form lens disk 1; lenses with degrees of -2.0D, -1.75D, ..., -0.25D form lens disk 2, and so on. In some embodiments, each lens disk can also include a flat mirror (i.e., with a degree of 0D). For example, the lens power of lens disk 1 is -4.0D, -3.75D, ..., -2.25D, 0D; the lens power of lens disk 2 is -2.0D, -1.75D, ..., -0.25D, 0D, etc. In some embodiments, the eyepiece adjustment device 120 may also include at least one adjustment knob or dial for adjusting the rotation of the lens disk. For example, the adjustment knob or dial may be connected to the rotation axis of the lens disk. In other embodiments, the adjustment knob or dial may be the compass itself that carries the lens. In some embodiments, the eyepiece adjustment device 120 may have a mark indicating the lens power to facilitate adjustment and selection of the required lens and to facilitate reading. For example, the adjustment knob or dial may have a label indicating the lens reading. By rotating the label (such as -2.0D) to a mark (such as a pointer, a scale line, etc.) indicating the position of the eyepiece, it means that the current eyepiece is a -2.0D lens.

[0030] In some embodiments, the eyepiece adjustment device 120 can be used to adjust the astigmatism of the eyepiece 110. In some embodiments, the eyepiece adjustment device 120 can include at least one positive cylindrical lens combination box and / or at least one negative cylindrical lens combination box. In some embodiments, the positive cylindrical lens combination box and / or the negative cylindrical lens combination box can include at least one cylindrical lens disk. The cylindrical lens disk can be composed of cylindrical lenses of different degrees radially installed on a compass that can rotate around the central axis according to a certain rule. In some embodiments, the astigmatism adjustment range of the cylindrical lens disk can be 0D-±6.5D. In some embodiments, cylindrical lenses of different degrees can be arranged according to the degree size in a gradient of 0.25D to form a lens disk. For example, the cylindrical lens degree of cylindrical lens disk 1 can be -4.0D, -3.75D, ..., -2.25D, 0D; the cylindrical lens degree of cylindrical lens disk 2 can be -2.0D, -1.75D, ..., -0.25D, 0D, etc. In some embodiments, the eyepiece adjustment device 120 can also include at least one adjustment knob or dial for adjusting the rotation of the cylindrical lens disk. For example, the adjustment knob or dial may be connected to the rotation axis of the cylindrical lens disk. In other embodiments, the adjustment knob or dial may be the compass itself that carries the cylindrical lens. In some embodiments, the eyepiece adjustment device 120 may have a mark indicating the degree of the cylindrical lens to facilitate adjustment and selection of the required cylindrical lens and to facilitate reading.

[0031] In some embodiments, the eyepiece adjustment device 120 can also be used to adjust the astigmatism axis of the eyepiece 110. In some embodiments, the eyepiece adjustment device 120 can also include a cylindrical axis position knob, a cylindrical axis cursor, a cylindrical axis scale, etc., to adjust the cylindrical axis position (i.e., the astigmatism axis). For example, by rotating the knob to rotate the cylindrical axis cursor to the 125° scale, it can be indicated that the astigmatism axis of the eyepiece 110 is 125°.

[0032] In some embodiments, the eyepiece adjustment device 120 may have a signal connection (such as an electrical connection, a wireless connection, etc.) with the controller 160. The controller 160 may control the eyepiece adjustment device 120 to adjust the diopter, astigmatism, and / or astigmatism axis of the eyepiece 110. In some embodiments, the eyepiece adjustment device 120 may also include one or more adjustment motors for adjusting the diopter, astigmatism, and / or astigmatism axis of the eyepiece 110 under the control of the controller 160. For example, the adjustment motor may be used to drive the lens disk to rotate to adjust the diopter of the eyepiece 110. For another example, the adjustment motor may be used to drive the cylindrical lens disk to rotate to adjust the astigmatism of the eyepiece 110. For another example, the adjustment motor may be used to drive the rotation of the cylindrical lens to adjust the astigmatism axis of the eyepiece 110.

[0033] In some embodiments, the controller 160 can control the eyepiece adjustment device 120 to adjust the diopter, astigmatism and / or astigmatism axis of the eyepiece 110 according to the retinoscopy image. For example, when the movement direction of the reflected light band in the retinoscopy image is opposite to that of the projected light band (i.e., reverse movement), the controller 160 can control the eyepiece adjustment device 120 to increase the negative lens degree of the eyepiece 110. For another example, when the reflected light bands corresponding to the projected light bands at different angles in the retinoscopy image are all in the same direction as the movement direction of the corresponding projected light bands (i.e., forward movement), the controller 160 can control the eyepiece adjustment device 120 to increase the positive lens degree of the eyepiece 110 appropriately. In some embodiments, the controller can determine the degree of the positive lens or negative lens that needs to be increased according to the degree of forward movement and reverse movement. For example, if the reflected light band of the current retinoscopy image has a large reverse amplitude, and the final eyepiece diopter under the same retinoscopy conditions (such as the same eyepiece diopter) and the same reverse amplitude in the historical data is -5.0D, the controller 160 can control the eyepiece adjustment device 120 to adjust the diopter of the eyepiece 110 to -5.0D.

[0034] In some embodiments, the eyepiece adjustment device 120 may be signal-connected to the control device 120. The control device may be used to control the eyepiece adjustment device 120 to adjust the diopter, astigmatism and / or astigmatism axis of the eyepiece 110.

[0035] In some embodiments, the retinoscope 140 can be used to project light to the inspected eye 180. The retinoscope 140 can also change or adjust the properties (such as shape, orientation, direction of movement, etc.) of the projected light to meet different inspection requirements. In some embodiments, the retinoscope 140 can include a projection module, a retinoscope hole, and an adjustment module.

[0036] In some embodiments, the projection module may include a combination of one or more of a light source, a condenser, a light bar, a reflector, etc. The light source may be used to generate projection light. For example, the light source may include a halogen incandescent lamp, an LED lamp, a fluorescent lamp, a linear filament bulb, etc. The condenser may be used to converge the projection light emitted from the light source. For example, the condenser may converge the projection light into parallel light. The light bar may be used to limit the luminous flux to shape the projection light. For example, the light bar may include a circular slit to shape the projection light into a circular beam. For another example, the light bar may include a strip slit to shape the projection light into a strip beam. Depending on the light beam, the retinoscope 140 may include a point light retinoscope and a strip light retinoscope. In some embodiments, the light bar may be a combination of a circular slit and a strip slit with an adjustable diameter, so that the projection light can be shaped into a circular beam or a strip beam as needed. In some embodiments, the mirror surface of the reflector may be at an angle of 0 to 90° with the projection light (such as a circular beam or a strip beam) to reflect the projection light to the eye 180 to be examined. Specifically, the angle between the mirror surface of the reflector and the projected light may be 30° to 60° (eg, 45°).

[0037] The retinoscope hole can be used to receive reflected light (such as reflected light from the retina of the inspected eye). In some embodiments, the retinoscope hole can be set in the middle of the reflector. The aperture of the retinoscope hole can be 1 to 5 mm (such as 1 mm, 2 mm, 3 mm, 5 mm, etc.). In some embodiments, the adjustment module can be used to adjust the light projected by the projection module. For example, the adjustment module can include a convergence adjustment unit and an axial adjustment unit. The convergence adjustment unit can adjust the distance between the condenser and the light source to adjust the degree of convergence of the projected light. The axial adjustment unit can rotate the strip slit light bar so that the strip projection light rotates in the meridian direction of the inspected eye 180. In some embodiments, the retinoscope 140 can have a signal connection with the controller 160, so that the controller 160 can automatically or according to the parameters input manually adjust the various modules / units of the retinoscope. For example, the controller can adjust the angle of the projection light emitted by the light source and the corresponding reflector angle, the distance between the light source and the condenser, the type of light bar, the angle of the strip light bar, etc. In some embodiments, the adjustment module can also be used to adjust the moving direction, moving distance, moving speed, etc. of the light projected by the projection module. For example, the adjustment module may adjust the movement of the projected light by adjusting the mirror orientation of the reflector.

[0038] It should be noted that the above description of the structure of the retinoscope 140 is only for the purpose of exemplary illustration and is not intended to limit the scope of the present application. In some alternative embodiments, the retinoscope 140 can also have other variations. For example, in some embodiments, the reflector can be a semi-transparent and semi-reflective mirror. In this case, the retinoscope hole may not be provided in the middle of the reflector, and the camera 150 may be arranged behind the semi-transparent and semi-reflective mirror. In some embodiments, the retinoscope 140 may include a screen and a retinoscope hole that can emit light, wherein the screen that can emit light can be placed parallel to the eyepiece 110 and the retinoscope hole can be provided in the middle of the screen. In some embodiments, the screen that can emit light can have a signal connection with the controller 160. The luminous screen can display shapes such as light spots and light bands according to the received signal. The size, size, brightness, color, movement mode, rotation mode, etc. of the shape displayed by the luminous screen can be adjusted by the controller 160.

[0039] In some embodiments, the camera 150 may be disposed on the retinoscope hole of the retinoscope 140. The camera 150 may be used to receive a retinoscopy image. The retinoscopy image may include light reflected by the retina of the inspected eye. In some embodiments, the distance between the camera 150 and the eyepiece 110 may be set to 0.5m, 0.67m or 1m. In some alternative embodiments, the distance between the camera 150 and the eyepiece 110 may also be other values. In some embodiments, the eyepiece 110 may include a working lens. The degree of the working lens may be adjusted accordingly according to the different distances between the camera 150 and the eyepiece 110. For example, when the distance between the camera 150 and the eyepiece 110 is 0.5m, the degree of the working lens may be 2D; when the distance is 0.67m, the degree of the working lens may be 1.5D; when the distance is 1m, the degree of the working lens may be 1D. In some embodiments, the camera 150 may have a signal connection with the controller 160, so that the camera may perform image acquisition according to the signal received from the controller 160. The controller 160 can control the camera's acquisition frequency, acquisition duration, image clarity and other parameters. For example, the camera 150 can capture a frame of image at intervals (such as 0.1s, 0.2s, 0.5s, 1s, etc.). For another example, the camera 150 can capture a video for a continuous period of time (such as 3s, 5s, 10s, etc.). For another example, the camera can capture images / videos with a clarity of 1080P (or 480P, 720P, etc.). In some embodiments, the camera 150 can send the captured images / videos to the information display screen 170 for display. In some embodiments, the camera 150 can send the captured images / videos to a storage device (for example, internal storage, external storage, etc.) for storage. In some embodiments, the controller 160 can retrieve the images / videos captured by the camera 150 and analyze the images / videos.

[0040] In some embodiments, the controller 160 can be used to execute the instructions of the present application. Specifically, the controller 160 can execute the methods, programs, objects, components, data structures, processes, modules and functions of the specific functions described in the present application. For example, the controller 160 can control the eyepiece adjustment device 120 to adjust the diopter, astigmatism and / or astigmatism axis of the eyepiece 110. For another example, the controller 160 can control and / or adjust the various modules / units of the retinoscope. In some embodiments, the controller 160 can send parameters (e.g., the diopter of the eyepiece 110) and instructions (e.g., selection instructions, switching instructions, etc.) associated with the eyepiece 110 to the eyepiece adjustment device 120 so that the eyepiece adjustment device 120 selects the required eyepiece 110. In some embodiments, the controller 160 may send parameters associated with the movement of the projected light of the retinoscope 140 (e.g., the moving speed, moving range, distance of each movement, moving direction, etc.) and instructions (e.g., start moving instructions, stop moving instructions, etc.) and instructions associated with the movement of the projected light of the retinoscope 140 to the retinoscope 140, so that the projected light generated by the retinoscope 140 moves accordingly. In some embodiments, the controller 160 may include at least one hardware processor, such as a microcontroller, a microprocessor, a reduced instruction set computer (RISC), an application specific integrated circuit (ASIC), an application specific instruction set processor (ASIP), a central processing unit (CPU), a graphics processing unit (GPU), a physical processing unit (PPU), a microcontroller unit, a digital signal processor (DSP), a field programmable gate array (FPGA), an advanced RISC machine (ARM), a programmable logic device (PLD), any circuit or processor capable of performing at least one function, or any combination thereof.

[0041] In some embodiments, the retinoscopy optometry device 100 may further include a sight tube 130. The sight tube 130 may be connected to the eyepiece 110, the eyepiece adjustment device 120, the retinoscope 140 and the camera 150. In some embodiments, the sight tube 130 may be a cylindrical hollow tube with a certain cross-sectional shape (e.g., circular, square, rectangular, etc.). The eyepiece 110 / eyepiece adjustment device 120 and the camera 150 may be placed at the two ends of the sight tube 130 respectively, and the retinoscope 140 may be placed in the sight tube 130 and close to the camera 150. In some embodiments, the length of the sight tube 130 may be adjusted (e.g., manually adjusted, automatically adjusted, etc.). For example, the sight tube 130 may be stretched or contracted. The stretching or contraction of the sight tube 130 may be used to change the spacing between the camera 150 and the eye 180 to be examined. In some embodiments, the sight tube 130 may have a scale indicating the length of the sight tube, for displaying / determining the length of the current sight tube. In some embodiments, the sight tube 130 may be connected to the controller 160 by a signal so as to automatically adjust the length of the sight tube according to the signal of the controller. In some embodiments, the controller 160 may also control the eyepiece adjustment device to adjust the degree of the eyepiece (such as the working lens) according to the length of the sight tube.

[0042] In some embodiments, the retinoscopy device 100 may include an information display screen 170. The information display screen 170 may display information such as user information, retinoscopy images and / or diopter test results. In some embodiments, the information display screen 170 may display the user's name, gender, age, ID number, ID photo, affiliated unit, social identity, eye medical history, etc. or any combination thereof. For example, in a student vision test activity organized by a school, the information display screen 170 may display the student's name, gender, age, student number, affiliated school, grade, class, etc. or any combination thereof. In some embodiments, the information display screen 170 may display the retinoscopy image received from the camera 150. In some embodiments, the information display screen 170 may display diopter test results, astigmatism test results, etc. The shape of the information display screen 170 may be rectangular, square, circular, elliptical, etc. In some embodiments, the information display screen 170 is signal-connected to the controller 160. The controller 160 may control the content displayed on the information display screen 170.

[0043] In some embodiments, the retinoscopy optometry device 100 may include a subject's head fixing device 190. The subject's head fixing device 190 may be used to fix the subject's head, so that the subject's examination process can be carried out stably. In some embodiments, the head fixing device 190 may include any combination of a mandibular tray, a head pad, a fixing belt, a seat, etc. In some embodiments, one or more of the mandibular tray, the head pad, the fixing belt, the seat, etc. can be freely adjusted up and down, left and right, and / or front and back. By adjusting one or more of the mandibular tray, the head pad, the fixing belt, the seat, etc., the subject's inspected eye 180 can be made coaxial with the visual tube 130 (or with the eyepiece 110, the eyepiece adjustment device 120, the retinoscope 140, the camera 150). As an example only, when the subject's left eye is examined, the subject's head fixing device 190 can be translated to the left as a whole by the distance of the subject's pupil distance, that is, the subject's right eye can be examined. In some embodiments, the subject's head fixing device 190 can be adjusted under the control of the controller 160.

[0044] In some embodiments, the retinoscopy device 100 may include a control device. The examiner (such as a medical staff) can control the eyepiece adjustment device 120 to adjust the diopter, astigmatism and / or astigmatism axis of the eyepiece 110 through the control device. For example, the examiner can judge the refractive state or astigmatism state of the examinee according to the retinoscopy image displayed in the information display screen 170, and further control the eyepiece adjustment device 120 to adjust it through the control device. In some embodiments, the control device may include a control handle, a control button, a voice recognition device, etc. or any combination thereof. In some embodiments, the control device may have a signal connection with the eyepiece adjustment device 120, the viewing tube 130, the retinoscope 140, the camera 150, the information display screen 170, the examinee's head fixing device 190, etc. For example, the examiner can control the cylindrical axis position knob through the control handle to adjust the astigmatism axis of the eyepiece 110. In some embodiments, the control device may only have a signal connection with the controller 160. The control device can send the received control instructions of the examiner to the controller 160, and adjust other components of the retinoscopy optometry device 100 through the controller 160.

[0045] In some embodiments, the retinoscopy optometry device 100 can be used to perform retinoscopy optometry on both eyes of a user at the same time. For example, the retinoscopy optometry device 100 may include a sight tube, in which a partition may be provided to separate the sight tube into two optometry areas, such as a first optometry area and a second optometry area. The first optometry area may include a first eyepiece, a first retinoscopy mirror, and a first camera that are coaxially distributed. The second optometry area may include a second eyepiece, a second retinoscopy mirror, and a second camera that are coaxially distributed. In some embodiments, the retinoscopy optometry device 100 may also include an eyepiece adjustment device to adjust the diopter, astigmatism, and / or astigmatism axis of the first eyepiece and the second eyepiece. The first eyepiece and the second eyepiece may share the same eyepiece adjustment device, or the first eyepiece and the second eyepiece may also correspond to different eyepiece adjustment devices, respectively. The first eyepiece and the second eyepiece involved in the retinoscopy optometry device 100 in this embodiment are similar to the aforementioned eyepiece 110; the first retinoscopy mirror and the second retinoscopy mirror are similar to the aforementioned retinoscopy mirror 140; the first camera and the second camera are similar to the aforementioned camera 150; therefore, they will not be repeated here. By performing retinoscopy on both eyes of the same examinee at the same time, the examination time can be effectively reduced and the examination efficiency can be improved.

[0046] In some embodiments, the retinoscopy optometry device 100 may further include an iris identity recognition device. The iris identity recognition device may be used to obtain the iris information of the subject and identify the identity of the subject before or during optometry. The retinoscopy optometry device 100 (such as the controller 160) may obtain relevant information of the subject based on the identity of the subject. For example, the controller 160 may obtain the historical data of the subject (for example, the last optometry time, the last optometry result, etc.), and start the current optometry (such as determining the initial optometry degree) based on the historical data, thereby shortening the optometry time. In some embodiments, the iris identity recognition device may be placed on the outside of the eyepiece end of the viewing tube 130. In some embodiments, the iris identity recognition device may include a camera 150. For example, the camera 150 may obtain an image of the eye being examined and transmit it to the controller 160, and the controller 160 may perform iris identity recognition based on the image of the eye being examined.

[0047] It should be noted that the above-mentioned description of the retinoscopy optometry device 100 is only for example and explanation, and does not limit the scope of application of the present application. For those skilled in the art, various corrections and changes can be made to the retinoscopy optometry device 100 under the guidance of the present application. However, these corrections and changes are still within the scope of the present application. For example, in some embodiments, the viewing barrel 130 can be omitted. For another example, the eyepiece 110 can be a single lens, or a combination of multiple lenses.

[0048] Figure 22 is an exemplary flow chart of optometry according to some embodiments of the present application. Specifically, the optometry process 200 of the retinoscopy optometry device can be implemented by the retinoscopy optometry system 300 (or the processor 160 of the retinoscopy optometry device 100, etc.). Figure 2 As shown, the optometry process 200 of the retinoscopy optometry device may include:

[0049] Step 210, control the movement and / or rotation of the light emitted by the retinoscope. Specifically, step 210 can be performed by the controller 160 (such as the retinoscope control module 310). For example, the retinoscope control module 310 can control the movement mode and / or rotation angle of the light emitted by the retinoscope.

[0050] In some embodiments, the retinoscope can be a point light retinoscope, and the retinoscope control module 310 can control the rotation of the light emitted by the retinoscope so that it makes a circular motion in the pupil area. In some embodiments, the retinoscope can be a strip light retinoscope, and the retinoscope control module 310 can control the 360° self-rotation of the light emitted by the retinoscope. In some embodiments, when the retinoscope is a strip light retinoscope, the retinoscope control module 310 can control the movement of the light emitted by the retinoscope, for example, the light emitted by the retinoscope moves along the meridian direction of 45°, 90°, 135°, and 180° in the pupil area. In some embodiments, the parameters of the movement or rotation of the light emitted by the retinoscope (such as the direction, speed, frequency, etc. of movement or rotation) can be pre-set, or can be adjusted according to actual needs (such as according to whether the refractive power or astigmatism is currently detected; or according to the forward and reverse movement of the retinoscopy optometry image in the last detection, etc.). For example, the retinoscope control module 310 can control the point light emitted by the retinoscope to make a circular motion counterclockwise at a speed of 4s / week. For another example, the retinoscope control module 310 can control the strip of light emitted by the retinoscope to rotate clockwise at a speed of 90° / s. For another example, the retinoscope control module 310 can control the strip of light emitted by the retinoscope to move 2-3 times at a frequency of 2s / time in the 90° meridian direction of the pupil area, with an amplitude of 2-10cm.

[0051] In some embodiments, before executing step 210, the controller 160 may control the eyepiece adjustment device to adjust the degree of the eyepiece 110 to the degree of the working lens. In some embodiments, the working lens may be a separate dedicated lens; or, the working lens may also be a lens in a lens tray. The degree of the working lens may be adjusted accordingly according to the distance between the camera 150 and the eyepiece 110. For example, when the distance between the camera 150 and the eyepiece 110 is 0.5m, the degree of the working lens may be 2D; when the distance is 0.67m, the degree of the working lens may be 1.5D; when the distance is 1m, the degree of the working lens may be 1D. In some embodiments, before executing step 210, the controller 160 may use an identity recognition device (including but not limited to an iris identity recognition device, a face recognition device, a fingerprint recognition device, etc.) to identify the identity of the person being examined. The controller 160 may obtain the historical optometry record of the person being examined from the database according to the identity of the person being examined. For example, the controller 160 may obtain the result of the most recent optometry of the person being examined. In this case, the controller 160 can control the eyepiece adjustment device to adjust the degree of the eyepiece 110 to the eyepiece degree of the examinee's examined eye during the most recent eye examination.

[0052] Step 220, obtaining the retinoscopy image captured by the camera. Specifically, step 220 may be executed by the controller 160 (eg, the image acquisition module 320).

[0053] In some embodiments, the camera 150 can capture the retinoscopy images in different forms (e.g., single frame, multiple frames, video, etc.). In some embodiments, the image acquisition module 320 can have a signal connection (e.g., electrical connection, wireless connection, etc.) with the camera 150 to obtain the retinoscopy images captured by the camera. In some embodiments, the image acquisition module 320 can acquire the retinoscopy images captured by the camera 150 in real time. In some embodiments, the image acquisition module 320 can acquire the retinoscopy images captured by the camera 150 stored in a storage device (e.g., internal memory, external memory, etc.).

[0054] In some embodiments, the retinoscopy optometry image acquired by the image acquisition module 320 may include images and / or videos of one or more optometry operations. An optometry operation may represent a movement and / or rotation of the retinoscope emitting light. For example, the process from when the retinoscope emitting light begins to move to when it stops moving may be considered as an optometry operation.

[0055] Step 230, determining the refractive state of the examined eye according to the retinoscopy image. Specifically, step 230 may be performed by the state determination module 330 (eg, the refractive state determination unit 332).

[0056] When the eye is stationary, if the parallel light rays from a distant object (for example, more than 5 meters away) pass through the eye's refractive system and the focus falls accurately on the retina to form a clear image, this eye is called an emmetropia (i.e., normal refraction); if the focus does not fall on the retina, this eye is called an emmetropia (i.e., refractive error). Among them, if the focus falls in front of the retina, it is myopia, and if the focus falls behind the retina, it is hyperopia. The retinoscopy method uses a retinoscope to project a beam of light directly to the patient's eye refractive system to the retina, and then observes the reflected light from the retina for retinoscopy analysis. When testing the refractive state of the eye being examined, the light projected by the retinoscope can be moved in the pupil area. The forward and reverse motions formed by the reflected light of the retina are different for different patients with different refractive states.

[0057] In some embodiments, the refractive state determination unit 332 can determine the refractive state of the inspected eye using a judgment rule based on the acquired retinoscopy image. For example, if the retinoscopy image is reverse motion, the refractive state determination unit 332 can determine that the refractive state of the inspected eye is myopia. For another example, if the retinoscopy image is forward motion, the refractive state determination unit 332 can determine that the refractive state of the inspected eye is hyperopia. For another example, when the retinoscopy image is a neutral image, the refractive state determination unit 332 can determine that the refractive state of the inspected eye is normal. In some embodiments, the refractive state determination unit 332 can also determine the refractive power of the inspected eye using a judgment rule based on the shadow motion state of the retinoscopy image. The shadow motion state of the retinoscopy image may include but is not limited to any combination of forward and reverse motion conditions, reflected light moving speed, reflected light brightness, reflected light shape (such as width, etc.). The shadow motion state of the retinoscopy image can be obtained by image recognition technology. In some embodiments, the judgment rule may include rules manually input based on historical experience. For example, a correspondence between the retinoscopy image reverse movement and myopia (or forward movement and hyperopia) can be artificially established, and the correspondence can be stored in a memory for the refractive state determination unit 332 to call. In some embodiments, the judgment rule can be determined based on historical optometry data. For example, in the historical optometry process, when the retinoscopy image is a certain forward movement (or reverse movement) speed, the eyepiece diopter determined by the final optometry is Q, then a correspondence rule between the forward movement (or reverse movement) speed and the eyepiece diopter Q can be established.

[0058] In some embodiments, the refractive state determination unit 332 can determine the refractive state of the examined eye based on the retinoscopy image using a trained refractive state determination model (such as a machine learning model). The refractive state may include myopia, hyperopia, normal, and specific refractive degrees (such as myopia degree, hyperopia degree), etc. In some embodiments, the refractive state determination model may include but is not limited to a classification and logistic regression (Logistic Regression) model, a k-nearest neighbor (kNN) model, a Naive Bayes (NB) model, a Support Vector Machine (SVM) model, a Decision Tree (DT) model, a Random Forests (RF) model, a Regression Tree (CART) model, a Gradient Boosting Decision Tree (GBDT) model, an xgboost (eXtreme Gradient Boosting), a Gradient Boosting Machines (GBM) model, a Least Absolute Shrinkage and Selection Operator (LASSO) model, an Artificial Neural Networks (ANN) model, a Convolutional Neural Networks (CNN) model, a Recurrent Neural Network (RNN) model, or any combination of one or more thereof.

[0059] In some embodiments, the refractive state determination model can be trained based on historical retinoscopy images and corresponding optometry results. For example, the historical retinoscopy images and corresponding optometry results (training labels) can be input into the initial model to train the refractive state determination model.

[0060] In some embodiments, the refractive state determination model can be obtained by training based on the shadow motion state of the historical retinoscopy images and the corresponding optometry results. In some embodiments, the processor 160 can extract the shadow motion state of the historical retinoscopy images (such as based on image recognition technology). The shadow motion state of the retinoscopy images can include but is not limited to any combination of one or more of the forward and reverse motion conditions, the moving speed of the reflected light, the brightness of the reflected light, the shape of the reflected light (such as width, etc.). After obtaining the shadow motion state of the historical retinoscopy images, the shadow motion state and the corresponding optometry results (training labels) can be input into the initial model to train and obtain the refractive state determination model. For example, in the historical optometry process, when the retinoscopy images are at a certain forward (or reverse) speed, the eyepiece diopter corresponding to the final optometry result is D, then the corresponding relationship between the forward (or reverse) speed and the eyepiece diopter D can be used as a set of training data. For another example, in the historical eye examination process, the retinoscopy image is a certain reversal speed and a certain brightness, and the eyepiece diopter corresponding to the final eye examination result is M. Then, the correspondence between the reversal speed and the brightness and the eyepiece diopter M can be used as a set of training data.

[0061] In some embodiments, the refractive state determination model obtained through training can also be tested using a test set. When the training and / or testing of the model meets preset conditions (for example, the number of training samples reaches a predetermined number, the accuracy of the model test is greater than a predetermined accuracy threshold, etc.), the model training can be considered completed, thereby obtaining a trained refractive state determination model.

[0062] Step 240, controlling the eyepiece adjustment device to adjust the diopter of the eyepiece according to the refractive state of the eye being examined. Specifically, step 240 can be performed by the adjustment module 340 (such as the diopter adjustment unit 342).

[0063] In this step, the diopter adjustment unit 342 can control the eyepiece adjustment device 120 to adjust the diopter of the eyepiece 110 according to the refractive state of the examined eye determined by the refractive state determination unit 332. For example, when the retinoscopy image is reverse (i.e., the refractive state is myopia), the diopter adjustment unit 342 can control the eyepiece adjustment device to increase the negative lens degree of the eyepiece. For another example, when the retinoscopy image is forward (i.e., the refractive state is hyperopia), the diopter adjustment unit 342 can control the eyepiece adjustment device to increase the positive lens degree of the eyepiece. In some embodiments, the diopter adjustment unit 342 can adjust the diopter of the eyepiece 110 according to the set adjustment range. For example, the diopter adjustment unit 342 can increase / decrease the lens degree of 0.25D (or 0.5D, 1D, etc.) each time. In some embodiments, if the retinoscopy image changes from reverse motion to forward motion (or from forward motion to reverse motion) before and after the eyepiece is adjusted, the diopter adjustment unit 342 can control the eyepiece adjustment device to adjust the eyepiece and reduce the adjustment range of the lens degree. For example, when the eyepiece is a -3.0D lens, the retinoscopy image is reverse motion, and when the eyepiece is a -3.5D lens, the retinoscopy image is forward motion, then the diopter adjustment unit 342 can adjust the eyepiece to a -3.25D lens. In some embodiments, when the refractive state of the examined eye includes a specific diopter of the examined eye, the diopter adjustment unit 342 can control the eyepiece adjustment device 120 to adjust the eyepiece 110 to the corresponding diopter according to the specific diopter.

[0064] Step 250, determining the astigmatism state of the examined eye according to the retinoscopy image. Specifically, step 250 may be performed by the state determination module 330 (eg, the astigmatism state determination unit 334).

[0065] Astigmatism is a manifestation of abnormal refractive error of the eye. According to the manifestation, astigmatism can be divided into regular astigmatism and irregular astigmatism. The former can be corrected with lenses, while the latter is more difficult to correct with lenses. In the embodiments of the present application, the astigmatism state of the eye under examination may include no astigmatism, regular astigmatism and irregular astigmatism. When the eye under examination has regular astigmatism, the astigmatism state may further include astigmatism degree and / or astigmatism axis.

[0066] In some embodiments, when the retinoscope is a point light retinoscope, the controller 160 (such as the retinoscope control module 310) can control the retinoscope 140 so that the light emitted by it moves in a circular motion in the pupil area. The controller 160 (such as the image acquisition module 320) can acquire the retinoscopy image when the light moves in a circular motion. In some embodiments, the state determination module 330 (such as the astigmatism state determination unit 334) can determine the astigmatism state of the eye to be inspected based on the judgment rule according to the retinoscopy image. The rules may include but are not limited to: when the motion trajectory of the reflected light in the retinoscopy image (i.e., the reflected light of the inspected eye) is the same as the motion trajectory of the light source (circular motion), the astigmatism state determination unit 334 can determine that the inspected eye has no astigmatism; when the motion trajectory of the reflected light in the retinoscopy image is an elliptical motion trajectory, the astigmatism state determination unit 334 can determine that the astigmatism state of the inspected eye is regular astigmatism; when the motion trajectory of the reflected light in the retinoscopy image is irregular and chaotic, the astigmatism state determination unit 334 can determine that the astigmatism state of the inspected eye is irregular astigmatism. In some embodiments, the astigmatism state determination unit 334 can also determine the astigmatism degree and astigmatism axis of the inspected eye according to the reflected light state of the retinoscopy image using judgment rules. The reflected light state of the retinoscopy image may include but is not limited to any combination of one or more of the forward and reverse motion conditions, the brightness, speed, and shape of the reflected light. The reflected light state of the retinoscopy image can be obtained by image recognition technology. In some embodiments, the judgment rules may include rules manually input based on historical experience. In some embodiments, the judgment rules can be determined based on historical optometry data. For example, when the motion trajectory of the reflected light is an elliptical motion trajectory, the astigmatism state determination unit 334 may axially determine the astigmatism axis to be on the major axis or the minor axis of the ellipse.

[0067] In some embodiments, when the retinoscope is a strip-shaped light retinoscope, the controller 160 (such as the retinoscope control module 310) can control the retinoscope 140 to rotate the light band emitted by it by 360°. The controller 160 (such as the image acquisition module 320) can obtain the retinoscopy image of the rotating light band. The astigmatism state determination unit 334 can determine the astigmatism state of the eye to be inspected based on the judgment rule according to the retinoscopy image. The rules may include but are not limited to: when the width, brightness and shadow movement state of the light band in the retinoscopy image are completely consistent, the astigmatism state determination unit 334 can determine that the eye to be inspected has no astigmatism; when there is inconsistency in the width, brightness and shadow movement state of the light band in the retinoscopy image (for example, the light band is broken, the width is different, the shearing, the shadow movement direction is different, the shadow movement speed is different, etc.), the astigmatism state determination unit 334 can determine that the eye to be inspected has astigmatism. In some embodiments, the astigmatism state determination unit 334 can also determine the astigmatism degree and astigmatism axis of the examined eye according to the shadow motion state of the retinoscopy image using judgment rules. The shadow motion state of the retinoscopy image may include but is not limited to any combination of one or more of the shadow motion direction, shadow motion speed, light band shape, light band change, etc. In some embodiments, the judgment rule may include rules manually input based on historical experience. In some embodiments, the judgment rule can be determined based on historical optometry data. For example, if the retinoscopy image has a phenomenon that the direction in which the light band is the brightest and widest is perpendicular to the direction in which the light band is the darkest and narrowest, the astigmatism state determination unit 334 can determine the axial directions of the two light bands as the astigmatism axis axial direction and the direction of maximum refractive power, respectively.

[0068] In some embodiments, the astigmatism state determination unit 334 can determine the astigmatism state of the eye under examination based on the retinoscopy image using a trained astigmatism state determination model (such as a machine learning model). In an embodiment of the present application, the astigmatism state of the eye under examination may include no astigmatism, regular astigmatism, and irregular astigmatism. When the eye under examination has regular astigmatism, the astigmatism state may further include astigmatism degree and / or astigmatism axis. In some embodiments, the astigmatism state determination model may include but is not limited to a classification and logistic regression (Logistic Regression) model, a k-nearest neighbor (kNN) model, a Naive Bayes (NB) model, a Support Vector Machine (SVM) model, a Decision Tree (DT) model, a Random Forests (RF) model, a Regression Tree (CART) model, a Gradient Boosting Decision Tree (GBDT) model, an xgboost (eXtreme Gradient Boosting), a Gradient Boosting Machine (GBM) model, a Least Absolute Shrinkage and Selection Operator (LASSO) model, an Artificial Neural Networks (ANN) model, a Convolutional Neural Networks (CNN) model, a Recurrent Neural Network (RNN) model, or any combination of one or more thereof.

[0069] In some embodiments, the astigmatism state determination model can be trained based on historical retinoscopy images and corresponding optometry results. For example, the historical retinoscopy images and corresponding optometry results (training labels) can be input into the initial model to train and obtain the astigmatism state determination model.

[0070] In some embodiments, the refractive state determination model can be obtained by training based on the shadow motion state (or light reflection state) of the historical retinoscopy images and the corresponding optometry results. In some embodiments, the processor 160 can extract the shadow motion state (or light reflection state) of the historical retinoscopy images based on image recognition technology. After obtaining the shadow motion state (or light reflection state) of the historical retinoscopy images, the shadow motion state (or light reflection state) and the corresponding optometry results (training labels) can be input into the initial model to train and obtain the astigmatism state determination model. For example, in the historical optometry process, when the retinoscopy image is a certain elliptical motion trajectory, the eyepiece astigmatism corresponding to the final optometry result is S, and the astigmatism axis is X°; then the correspondence between the elliptical motion trajectory and the eyepiece astigmatism S and the astigmatism axis X° can be used as a set of training data. For another example, in the historical eye examination process, the width of the light band in the retinoscopy image at different angles changes in a certain manner, and the eyepiece astigmatism corresponding to the final eye examination result is S', and the astigmatism axis is Y°. Then, the change in the width of the light band and the correspondence between the eyepiece astigmatism S' and the astigmatism axis Y° can be used as a set of training data.

[0071] In some embodiments, the astigmatism state determination model obtained through training can also be tested using a test set. When the training and / or testing of the model meets preset conditions (for example, the number of training samples reaches a predetermined number, the accuracy of the model test is greater than a predetermined accuracy threshold, etc.), the model training can be considered completed, thereby obtaining a trained astigmatism state determination model.

[0072] Step 260: Control the eyepiece adjustment device to adjust the astigmatism and / or astigmatism axis of the eyepiece according to the astigmatism state of the eye being examined. Specifically, step 260 may be performed by the adjustment module 340 (eg, the astigmatism adjustment unit 344).

[0073] In some embodiments, the astigmatism adjustment unit 344 can control the eyepiece adjustment device 120 to adjust the astigmatism degree and / or astigmatism axis of the eyepiece 110 according to the astigmatism state of the eye to be examined determined by the astigmatism state determination unit 334. In some embodiments, when the astigmatism state of the eye to be examined includes astigmatism axis information, the astigmatism adjustment unit 344 can control the eyepiece adjustment device 120 to increase / decrease the astigmatism degree of the eyepiece based on the astigmatism axis. In some embodiments, the astigmatism adjustment unit 344 can adjust the astigmatism degree of the eyepiece 110 according to the set adjustment amplitude. For example, the astigmatism adjustment unit 344 can increase / decrease the astigmatism degree of 0.25D (or 0.5D, etc.) each time. In some embodiments, when the astigmatism state of the eye to be examined includes astigmatism degree and astigmatism axis information, the astigmatism adjustment unit 344 can control the eyepiece adjustment device 120 to adjust the eyepiece 110 to the corresponding astigmatism degree and astigmatism axis.

[0074] Step 270 , determining whether the retinoscopy image meets the preset requirements. Specifically, step 270 may be executed by the controller 160 .

[0075] In some embodiments, after completing step 240 and / or step 260, the controller 160 (such as the image acquisition module 320) may further acquire the retinoscopy image captured by the camera. The controller 160 may determine whether the further acquired retinoscopy image meets the preset requirements.

[0076] In some embodiments, the preset requirement may be that the retinoscopy image reaches a neutralized state. For example, the reflected light spot of the retinoscopy image fills the pupil of the examined eye and does not move, or the state of the reflected light spot cannot be identified in the retinoscopy image. For another example, if the retinoscopy image neither moves forward nor backward after adjustment, it can be considered that the adjusted retinoscopy image meets the preset requirements. For another example, when the motion trajectory of the approximate neutralization point in the retinoscopy image is the same as the motion trajectory of the light source (circular motion), the controller 160 can determine that the retinoscopy image meets the preset requirements, that is, the astigmatism of the examined eye has been neutralized. For another example, when the width, brightness and shadow movement state of the rotating light band in the retinoscopy image are completely consistent, the controller 160 can determine that the retinoscopy image meets the preset requirements, that is, the astigmatism of the examined eye has been neutralized.

[0077] In some embodiments, when the retinoscopy image does not reach the neutralization state, the controller 160 can determine that the further acquired retinoscopy image does not meet the requirements. For example, when there is a forward or reverse movement in the retinoscopy image, the controller 160 can determine that the refractive state of the examined eye has not yet been neutralized. For another example, when the motion trajectory of the approximate neutralization point in the retinoscopy image is different from the motion trajectory of the light source (such as an elliptical motion, or an irregular chaotic state), the controller 160 can determine that the astigmatism state of the retinoscopy image has not yet been neutralized. For another example, when there are inconsistencies in the width, brightness and shadow movement state of the rotating light band in the retinoscopy image (for example, light band rupture, different widths, shearing, different shadow movement directions, different shadow movement speeds, etc.), the controller 160 can determine that the astigmatism state of the retinoscopy image has not yet been neutralized.

[0078] In some embodiments, if the adjusted refractive state and astigmatism state determined by the state determination module 330 both meet the preset requirements, step 280 may be performed. If the adjusted refractive state does not meet the preset requirements (such as not yet neutralized), step 230 may be performed. If the adjusted astigmatism state does not meet the preset requirements (such as not yet neutralized), step 250 may be performed. If the adjusted refractive state and astigmatism state do not meet the preset requirements, steps 230 and 250 may be performed.

[0079] Step 280 , determining the examination result of the examined eye. Specifically, step 280 may be executed by the controller 160 .

[0080] In some embodiments, when the retinoscopy image meets the preset requirements, the controller 160 can record the current eyepiece parameters. For example, the eyepiece parameters can be -3.25D lens, -1.0D cylinder, 180° astigmatism axis, recorded as -3.25DS / -1.0DC×180°. In some embodiments, the controller 160 can convert the adjusted eyepiece parameters into the actual optometry results of the inspected eye based on the length of the sight tube (or the distance between the camera 150 and the eyepiece 110). Corresponding to the sight tube length of 0.5m, 0.67m and 1.0m, the working lenses are 2.0D, 1.5D and 1.0D respectively. The actual optometry results of the inspected eye are obtained by subtracting the degree of the working lens from the adjusted eyepiece parameters. As an example only, the sight tube length is 0.5m, the adjusted eyepiece parameters are -3.25DS / -1.0DC×180°, and the actual optometry results are -5.25DS / -1.0DC×180°. In some embodiments, after determining the optometry result of the examined eye, the controller can output the optometry result, for example, by displaying it on the information display screen 170 interface, printing it, sending it to a storage device for storage, sending it to the examinee's mobile device, sending it to a cloud platform, etc., or any combination thereof.

[0081] It should be noted that the above description of the optometry process 200 is only for example and explanation, and does not limit the scope of application of the present application. For those skilled in the art, various modifications and changes can be made to the optometry process 200 under the guidance of the present application. However, these modifications and changes are still within the scope of the present application. For example, in the actual optometry process, the refraction can be checked first, and then the astigmatism; or the astigmatism can be checked first, and then the refraction; or the inspection of the refraction and astigmatism can be carried out alternately. For another example, when the examinee is examined, the pupil of the examined eye can be dilated first (such as using a mydriatic agent). For another example, when the examinee is examined, the examinee can be allowed to look at a distance (such as 5m away) for a period of time before the inspection. In some embodiments, the retinoscopy optometry device 100 can also include a voice prompt device, and during the optometry process, the controller 160 can send a prompt message to the examinee through the voice prompt device. For example, the controller 160 can prompt the examinee to align the examined eye with the eyepiece through the voice prompt device; the examinee can be prompted to mainly look at the retinoscope, etc.

[0082] Figure 3 is a module diagram of a retinoscopy system according to some embodiments of the present application. Figure 3As shown, the retinoscopy optometry system 300 may include a retinoscope control module 310 , an image acquisition module 320 , a state determination module 330 , and an adjustment module 340 . In some embodiments, the retinoscopy optometry system 300 may be implemented by a controller 160 .

[0083] The retinoscope control module 310 can be used to control the retinoscope. In some embodiments, the retinoscope control module 310 can be used to control the retinoscope to open and close. In some embodiments, the retinoscope control module 310 can control the movement and / or rotation of the light emitted by the retinoscope.

[0084] The image acquisition module 320 can be used to obtain the retinoscopy image. For example, the image acquisition module 320 can obtain the retinoscopy image taken by the camera. For another example, the image acquisition module 320 can obtain the retinoscopy image stored in a storage device (e.g., an internal memory, an external memory, etc.).

[0085] The state determination module 330 may further include a refractive state determination unit 332 and an astigmatism state determination unit 334. The refractive state determination unit 332 may be used to determine the refractive state of the eye being examined. For example, the refractive state determination unit 332 may determine the refractive state of the eye being examined based on the retinoscopy image. In some embodiments, the refractive state determination unit 332 may determine the refractive state of the eye being examined based on the acquired retinoscopy image using a judgment rule. In some embodiments, the refractive state determination unit 332 may determine the refractive state of the eye being examined based on the retinoscopy image using a trained refractive state determination model (such as a machine learning model). The astigmatism state determination unit 334 may be used to determine the astigmatism state of the eye being examined. For example, the astigmatism state determination unit 334 may determine the astigmatism state of the eye being examined based on the retinoscopy image. In some embodiments, the astigmatism state determination unit 334 may determine the astigmatism state of the eye being examined based on the judgment rule based on the retinoscopy image. In some embodiments, the astigmatism state determination unit 334 can also determine the astigmatism degree and astigmatism axis of the examined eye according to the light reflection state or shadow motion state of the retinoscopy image using a judgment rule. In some embodiments, the astigmatism state determination unit 334 can determine the astigmatism state of the examined eye according to the retinoscopy image using a trained astigmatism state determination model (such as a machine learning model).

[0086] The adjustment module 340 can be used to control the eyepiece adjustment device to adjust the eyepiece parameters. The adjustment module 340 can further include a diopter adjustment unit 342 and an astigmatism adjustment unit 344. The diopter adjustment unit 342 can control the eyepiece adjustment device to adjust the diopter of the eyepiece according to the refractive state of the eye being examined. The astigmatism adjustment unit 344 can control the eyepiece adjustment device to adjust the astigmatism and / or astigmatism axis of the eyepiece according to the astigmatism state of the eye being examined.

[0087] It should be understood that Figure 3 The system and its modules shown can be implemented in various ways. For example, in some embodiments, the system and its modules can be implemented by hardware, software or a combination of software and hardware. Among them, the hardware part can be implemented using dedicated logic; the software part can be stored in a memory and executed by an appropriate instruction execution system, such as a microprocessor or a dedicated design hardware. Those skilled in the art will understand that the above-mentioned method and system can be implemented using computer executable instructions and / or included in a processor control code, for example, such as a carrier medium such as a hard disk, a disk, a CD or a DVD-ROM, a programmable memory such as a read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. Such code is provided on the carrier medium such as a hard disk, a disk, a CD or a DVD-ROM, a programmable memory such as a read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. The system and its modules of the present application can not only be implemented by hardware circuits such as ultra-large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., but can also be implemented by software such as executed by various types of processors, and can also be implemented by a combination of the above-mentioned hardware circuits and software (for example, firmware).

[0088] It should be noted that the above description of the retinoscopy system and its modules is only for convenience of description and does not limit the present application to the scope of the embodiments. It is understandable that, after understanding the principle of the system, those skilled in the art may arbitrarily combine the modules or form a subsystem connected with other modules without deviating from the principle. For example, in some embodiments, Figure 3 The retinoscope control module 310, image acquisition module 320, state determination module 330 and adjustment module 340 disclosed in the invention can be different modules in one system, or one module can realize the functions of two or more modules mentioned above. For another example, each module can share a storage module, or each module can have its own storage module. In some embodiments, the retinoscope system 300 can also include other modules or units. For example, the system 300 can also include a model training module; the model training module can further include a refractive state determination model training unit and an astigmatism state determination model training unit. Such variations are within the scope of protection of the present application.

[0089] The beneficial effects that may be brought about by the embodiments of the present application include but are not limited to: (1) improving the accuracy of optometry; (2) improving the efficiency of optometry; (3) enabling autonomous optometry, which can be operated without the need for professionals; (4) optometry is not restricted by the site and occupies a small area; (5) the equipment is easy to carry and easy to use. It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects that may be produced may be any one or a combination of the above, or any other possible beneficial effects.

[0090] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0091] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0092] In addition, it will be appreciated by those skilled in the art that various aspects of the present application may be illustrated and described by a number of patentable categories or situations, including any new and useful process, machine, product or combination of substances, or any new and useful improvements thereto. Accordingly, various aspects of the present application may be performed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The above hardware or software may all be referred to as "data blocks", "modules", "engines", "units", "components" or "systems". In addition, various aspects of the present application may be represented as a computer product located in one or more computer-readable media, which includes computer-readable program code.

[0093] A computer storage medium may include a propagated data signal containing computer program code, for example, in baseband or as part of a carrier wave. The propagated signal may be in a variety of forms, including electromagnetic, optical, etc., or a suitable combination. A computer storage medium may be any computer-readable medium other than a computer-readable storage medium, which can be connected to an instruction execution system, device or apparatus to communicate, propagate or transmit the program for use. The program code on the computer storage medium may be transmitted via any suitable medium, including radio, cable, fiber optic cable, RF, or similar media, or any combination of the above media.

[0094] The computer program coding required for the operation of each part of the application can be written in any one or more programming languages, including object-oriented programming languages ​​such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C#, VB.NET, Python, etc., conventional procedural programming languages ​​such as C language, Visual Basic, Fortran 2003, Perl, COBOL 2002, PHP, ABAP, dynamic programming languages ​​such as Python, Ruby and Groovy, or other programming languages, etc. The program coding can be run completely on the user's computer, or run on the user's computer as an independent software package, or run partly on the user's computer and partly on the remote computer, or run completely on the remote computer or server. In the latter case, the remote computer can be connected to the user's computer through any network form, such as a local area network (LAN) or a wide area network (WAN), or connected to an external computer (e.g., via the Internet), or in a cloud computing environment, or used as a service such as software as a service (SaaS).

[0095] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

Claims

1. A retinoscopy optometry device, characterized in that: include: Eyepiece, eyepiece adjustment device, retinoscope, camera and controller; The camera is arranged on the retinoscope hole of the retinoscope, and the camera is used to obtain the retinoscopy image of the inspected eye, and the camera is signal-connected with the controller; The eyepiece adjustment device comprises at least one lens disk and / or cylindrical disk, wherein the lens disk is composed of lenses of different degrees installed on a compass rotating around a central axis according to a certain rule, and the cylindrical disk is composed of cylindrical mirrors of different degrees installed radially on the compass rotating around a central axis according to a certain rule; the eyepiece adjustment device is signal-connected to the controller, and the controller is used to: Controlling the movement and / or rotation of the light emitted by the retinoscope; Acquire the retinoscopy image captured by the camera; Determine the state of the eye under examination according to the retinoscopy image, wherein the state of the eye under examination includes a refractive state and / or an astigmatism state; According to the state of the inspected eye, the compass in the eyepiece adjustment device is controlled to rotate so as to adjust at least one parameter among the diopter, astigmatism and astigmatism axis of the eyepiece, wherein the retinoscopy image comprises an image acquired by the camera during the optometry operation of the movement and / or rotation of the light emitted by the retinoscope; After adjusting at least one parameter of the eyepiece, acquiring the retinoscopy image captured by the camera again; Determining whether the retinoscopy image obtained again meets the preset requirements; In response to meeting the preset requirement, an examination result of the examined eye is determined.

2. The retinoscopy optometry device according to claim 1, characterized in that: The retinoscopy optometry device further comprises a sight tube, and the eyepiece, the eyepiece adjustment device and the retinoscopy lens are all connected to the sight tube.

3. The retinoscopy optometry device according to claim 1, characterized in that: The distance between the eyepiece and the retinoscope is 0.5m, 0.67m or 1m.

4. The retinoscopy optometry device according to claim 1, characterized in that: The retinoscope comprises a strip-shaped light retinoscope or a point-shaped light retinoscope.

5. The retinoscopy optometry device according to claim 1, characterized in that: The retinoscope comprises a light source and a reflecting mirror.

6. The retinoscopy optometry device according to claim 1, characterized in that: The retinoscope includes a screen capable of emitting light.

7. The retinoscopy optometry device according to claim 1, characterized in that: The retinoscopy device also includes an information display screen, and the information display screen is used to display the retinoscopy image.

8. The retinoscopy optometry device according to claim 7, characterized in that: The retinoscopy optometry device also includes a control device; The examiner can control the eyepiece adjustment device to adjust the diopter of the eyepiece through the operating device.

9. The retinoscopy optometry device according to claim 1, characterized in that: The retinoscopy optometry device comprises two eyepieces, two retinoscopes and two cameras; The eyepiece adjustment device is capable of adjusting at least one parameter of the two eyepieces respectively; Each of the eyepieces corresponds to a retinoscope and a camera; The retinoscopy optometry device can perform retinoscopy on two eyes of a user simultaneously.

10. The retinoscopy optometry device according to claim 9, characterized in that: The retinoscopy optometry device further comprises a sight tube, wherein the sight tube comprises a partition, and the partition is used to separate the optometry areas of two eyes.

11. A retinoscopy optometry system, characterized in that: Optometry is performed using the retinoscopy optometry device according to any one of claims 1 to 10, the system comprising: a retinoscope control module, an image acquisition module, a state determination module and an adjustment module; The retinoscope control module is used to control the movement and / or rotation of the light emitted by the retinoscope; The image acquisition module is used to acquire a retinoscopy image captured by a camera, wherein the retinoscopy image includes an image acquired by the camera during an optometry operation of movement and / or rotation of light emitted by the retinoscope; The state determination module is used to determine the state of the examined eye according to the retinoscopy image; The adjustment module is used to control the rotation of the compass in the eyepiece adjustment device according to the state of the eye being examined, so as to adjust at least one parameter of the eyepiece's diopter, astigmatism and astigmatism axis; and After adjusting at least one parameter of the eyepiece, the image acquisition module is used to acquire the retinoscopy image taken by the camera again; The state determination module is used to determine whether the retinoscopy image acquired again meets the preset requirements; In response to meeting the preset requirement, an examination result of the examined eye is determined.

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