阅读说明：本技术 一种多维检测仪 (Multi-dimensional detector ) 是由 李志升 史山河 冯丹藜 李耕 于 2021-09-13 设计创作，主要内容包括：本发明提供了一种多维检测仪,包括：计算机控制电路(100)、光学传导测量部件(200)、输入输出部件(300)、电源供电电路(400)和机箱部件(500),在计算机控制电路(100)的作用下,光学传导测量部件(200)完成眼睛指标参数的获取并通过输入输出部件输出检测结果。本发明所述多维检测仪,在计算机电路控制下可以完成眼睛屈光度、散光度、轴相位度数、眼轴长度、晶状体厚度等参数的自动测量,输出具有眼睛潜在调节力系数的验光配镜报告、近视风险评级报告、近视防控措施建议报告。(The invention provides a multi-dimensional detector, comprising: the eye index detection device comprises a computer control circuit (100), an optical conduction measurement component (200), an input/output component (300), a power supply circuit (400) and a case component (500), wherein under the action of the computer control circuit (100), the optical conduction measurement component (200) acquires eye index parameters and outputs a detection result through the input/output component. The multi-dimensional detector can automatically measure parameters such as eye diopter, astigmatism, axial phase degree, eye axial length, lens thickness and the like under the control of a computer circuit, and outputs an optometry lens matching report, a myopia risk rating report and a myopia prevention and control measure suggestion report with eye potential accommodation power coefficients.)

1. A multi-dimensional inspection apparatus, comprising: the eye index detection system comprises a computer control circuit (100), an optical conduction measurement component (200), an input-output component (300), a power supply circuit (400) and a case component (500), wherein the computer control circuit (100) is used for controlling the optical conduction measurement component (200) to obtain eye index parameters and outputting a detection result and an optometry lens report with an eye potential accommodation force coefficient through the input-output component (300),

wherein the optical conduction measurement component (200) comprises: an eye positioning device (2100) for aligning the eye with the measuring window, a retinal split image focusing device (2200) for measuring and focusing the retina of the eye, a vision fixing device (2300) for aligning the visual axis of the eye with the visual axis of the measuring instrument, an auxiliary focusing device (2400) for calibrating and fine-tuning the measuring focus of the ametropia eye, an optical low coherence interferometry and dioptric axial measuring device (2500) for measuring the parameters of the eye, an eye accommodation state fixing device (2600) for eye sighting relaxation adjustment, and a reference light optical path processing device (2700) for optical path transformation of optical low coherence interferometry reference light;

the optical low coherence interferometry and diopter axis measurement device (2500) includes: the device comprises a first detection light source (2501), a fourth lens (2502), a second reflecting mirror (2503), a grating rotary drum (2504), a second light splitting prism (2505), a fifth lens (2506), a diaphragm (2507), a sixth lens (2508), a photoelectric detector (2509), a second detection light source (2510), an optical fiber (2511), a first optical fiber collimator (2512), a second optical fiber collimator (2513), a focus linkage device (2514), a third reflecting mirror (2515), a first half-mirror (2516) and a second half-mirror (2517);

the optical low coherence interferometry and diopter axis measurement device (2500) is used to enable measurement of one or more of the following parameters: refractive eye parameters, lens thickness, axial length, corneal thickness, anterior chamber depth, retinal thickness;

when the optical low-coherence interferometry and refraction axial measuring device (2500) is used for eye refraction measurement, light spots emitted by the first detection light source (2501) pass through the fourth lens (2502) and the second reflecting mirror (2503), irradiate the grating drum (2504) with a plurality of equal gaps to generate light spots, are emitted out through the second beam splitter prism (2505) in the grating drum (2504), and then enter an eye to be measured through the first half mirror (2516); when the grating rotary drum (2504) rotates at a constant speed, light spots moving at a constant speed are formed on the fundus of the eye to be detected, are emitted from the fundus of the eye to be detected, pass through the fifth lens (2506) and the diaphragm (2507), are received by the photoelectric detector (2509), and are converted into electric signals; the positional relationship between the imaging plane and the stop (2507) is obtained from the electric signal, the refractive state of the eye to be measured is judged, and the refractive power of the eye to be measured is calculated.

2. The multi-dimensional inspection machine according to claim 1, wherein the eye positioning device (2100) comprises: the device comprises a visual axis position adjusting gyro (2101), a monitor (2102), a charge coupler (2103), a tenth lens (2104) and a forehead support adjusting frame (2105), wherein an image of a tested eye is converted into an electric signal through the charge coupler (2103) and then displayed on the monitor (2102), the forehead support adjusting frame (2105) is used for adjusting the head position of the tested person, and the visual axis position adjusting gyro (2101) is used for adjusting the position and the direction of the multi-dimensional detector so that the visual axis of the tested eye coincides with the optical axis of the multi-dimensional detector.

3. The multi-dimensional inspection machine according to claim 2, wherein the retinal split focusing arrangement (2200) comprises: a retina focusing light source (2201), a first lens (2202), a double optical wedge (2203), a slit (2204), a third half mirror (2205), a second lens (2206), a CCD optical coupler (2207) and a first reflector (2208),

wherein, the light emitted by the retina focusing light source (2201) is focused on the retina of the eye to form a double-split image after passing through the first lens (2202), the double-optical wedge (2203), the slit (2204), the third half-transmitting and half-reflecting mirror (2205) and the first reflecting mirror (2208); the double split image returned from the retina is imaged on a CCD optical coupler (2207) through a second lens (2206) and converted into an electric signal, which is imaged on a monitor (2102).

4. The multi-dimensional inspection apparatus according to claim 1, wherein the vision fixing device (2300) comprises a sighting target light source (2301), a pattern reticle (2302), a first beam splitter prism (2303), and a third lens (2304),

the light emitted by the sighting target light source (2301) irradiates on the graphic reticle (2302), maps the graphic on the graphic reticle (2302) onto the first light splitting prism (2303), and enables eyes to see a distant sighting target graphic through the third lens (2304) and the second half mirror (2517) to form eye fixation.

5. The multi-dimensional instrument according to claim 1, wherein the focusing aid (2400) comprises a lens assembly consisting of a focusing lens (2401) and an eleventh lens (2402), and when the focusing aid is used for detecting an ametropia eye, the position of the focusing lens (2401) and/or the eleventh lens is finely adjusted to enable the visual axis of the eye to be coincident with the optical axis of the multi-dimensional instrument, so that the probe light is focused to the central position of the surface of the retina.

6. The multi-dimensional measuring instrument according to claim 2, wherein the eye accommodation state fixation device (2600) comprises: positioning a light source (2601), a seventh lens (2602), a fourth half mirror (2603), a fourth reflector (2604), an annular aperture plate (2605), an eighth lens (2606), a cross-shaped aperture plate (2607), a ninth lens (2608), a fifth half mirror (2609), and a fifth reflector (2610);

the positioning light source (2601) emits light spots, two light paths are formed by the seventh lens (2602) and the fourth half-mirror (2603), the first light path passes through the cross-shaped pore plate (2607) and the ninth lens (2608) to form a cross-shaped image, the second light path passes through the fourth reflector (2604), the annular pore plate (2605) and the eighth lens (2606) to form an annular image, the cross-shaped image and the annular image are irradiated to an eye to be detected through an optical axis, and light reflected from the eye is received by the charge coupler (2103) and the monitor (2102).

7. The multi-dimensional inspection machine according to claim 1, wherein the computer control circuit (100) is configured to generate a prescription report with an eye potential accommodation coefficient via an eye accommodation compensation algorithm and to generate a myopia risk rating report and a myopia prevention and control measure recommendation report via a myopia risk level prediction algorithm.

Technical Field

The invention relates to the technical field of medical ophthalmology detection, in particular to a multi-dimensional detector which mainly detects diopter, axial length and lens thickness data of eyes and outputs a lens matching scheme containing an eye accommodation coefficient, an eye myopia risk grade evaluation report and a myopia prevention and control scheme report.

Background

With the development of the ophthalmic medical detection technology, ophthalmic medical detection equipment is rapidly developed, and computer optometry instruments and optobiological detectors are widely applied, so that the requirements of optometry lens fitting and ophthalmic disease diagnosis and treatment are greatly facilitated, and optometry plays a great role in teenager vision health prevention and control general investigation. The problems that the function of detection equipment is single, main physical parameters of eyes need to be detected by various equipment, the application validity of detection data is poor, accurate prediction cannot be realized, individuation cannot be realized through intervention, a corresponding individualized prevention and control plan is not provided, and the simple one-sided suitability is poor generally exist.

Myopia prevention and control treatment is greatly influenced by individual factors, for example, due to the fact that the optometry instrument is influenced by poor proficiency of operators, insufficient coordination degree of patients and the like, and the adjustment capability of individual eyes is different, the dispersion and uncertainty of the output result of the optometry instrument are brought. Even after mydriasis, not all people can directly match glasses according to mydriasis degrees, and the problems that hyperopia needs to be reserved for proper adjustment and myopia cannot be fully matched to prevent the heightening degrees exist. This is fatal to children whose eyes are in development stage. An inexperienced optometrist will assign an inappropriate number of spectacles to young children, which will lead to a better prognosis of poor eye vision. How to effectively match the optometry of people with ametropia, the mature technology of optometrists is popularized and applied, and the optometry fitting method is one of the important subjects in the field of ophthalmology. If no expert guides the glasses to be matched according to the diopter given by the computer optometry instrument, the development of the forward vision of the teenager and the children can be damaged, the exertion of the eye adjusting power is inhibited, and the plastic vision disappears as a result, so that the vision can not be recovered.

The evaluation of the risk of myopia occurrence is that at present, no equipment for accurate study and judgment exists at home and abroad, the problem that the optimal prevention and control period is lost due to misdiagnosis and misjudgment exists, some equipment simply utilizes the change trend of the length of the eye axis to predict, neglects the correlation and individual difference of comprehensive biological parameters of eyes in the development and growth stage of teenagers, gives unreasonable prevention and control suggestions and measures, delays the treatment and prevention and control of eyesight health, and the most fundamental reason is that dynamic thinking and personalized solutions are lacked, and the inexperienced eyesight experts and clinical technologies are lacked, so that the eyesight intervention and prevention and control are unscientific, low in quality and lack of accuracy.

The multi-dimensional detector is intelligent equipment which is designed for accurately detecting and preventing and controlling the eyesight of the teenagers and outputs an eyesight detection and prevention and control scheme, the equipment is based on the normal development of the children and the teenagers, pertinently researches ametropia, strabismus and true and false myopia, combines a database established by cases of ametropia treatment success of ophthalmology optometrists, researches the universal rule of the children and the teenagers for optometry and lens fitting, and improves the accuracy and the effectiveness of the optometry and lens fitting of the children.

The multi-dimensional detector can pre-judge the myopia risk level of the eyes according to the relevance of various data of an eye vision system, such as age, diopter, length of an eye axis and thickness parameters of crystalline lenses, wherein the risk level is divided into four levels, namely 0 myopia risk, mild myopia risk, moderate myopia risk and severe myopia risk. By means of an eye vision expert theory and a practical experience database system, an accurate myopia risk judgment, prevention and control treatment scheme is provided, and an accurate means is provided for the treatment, prevention and control of teenager amblyopia.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is as follows: the multidimensional detector can automatically measure parameters such as eye diopter, astigmatism, axial phase power, eye axial length, lens thickness and the like under the control of a computer circuit, and output a lens prescription scheme containing an eye accommodation power coefficient, an eye myopia risk level evaluation report and a prevention and control scheme report. The detection data is slightly influenced by external human factors, and the reference force is high.

The invention provides a multi-dimensional detector, comprising: the computer control circuit is used for controlling the optical conduction measuring component to complete the acquisition of eye index parameters and outputting a detection result and an optometry lens prescription report with an eye potential accommodation force coefficient through the input and output component,

wherein the optical conduction measurement component comprises: the device comprises an eye positioning device for aligning an eye and a measuring window, a retinal split image focusing device for measuring and focusing the retina of the eye, a vision fixing device for aligning the visual axis of the eye and the visual axis of a measuring instrument, an auxiliary focusing device for calibrating and fine-tuning the measuring focus of the ametropia eye, an optical low coherence interferometry and dioptric axial measuring device for measuring eye parameters, an eye adjusting state fixing device for fixing eye vision marks to relax and adjust, and a reference light optical path processing device for optical low coherence interferometry and optical path transformation of reference light;

the optical low coherence interferometry and diopter axis measurement device comprises: the device comprises a first detection light source, a fourth lens, a second reflecting mirror, a grating rotary drum, a second beam splitter prism, a fifth lens, a diaphragm, a sixth lens, a photoelectric detector, a second detection light source, an optical fiber, a first optical fiber collimator, a second optical fiber collimator, a focus linkage device, a third reflecting mirror, a first half-transmitting and half-reflecting mirror and a second half-transmitting and half-reflecting mirror;

the optical low coherence interferometry and diopter axis measurement device is used to enable measurement of one or more of the following parameters: refractive eye parameters, lens thickness, axial length, corneal thickness, anterior chamber depth, retinal thickness;

when the optical low-coherence interferometry and refraction axial measuring device carries out eye refraction measurement, light spots emitted by the first detection light source pass through the fourth lens and the second reflector, irradiate the grating drum with a plurality of equal gaps to generate light spots, are emitted by the second beam splitter prism in the grating drum, and then enter a measured eye through the first half mirror; when the grating rotary drum rotates at a constant speed, light spots moving at a constant speed are formed on the fundus of the eye to be detected, are emitted from the fundus of the eye to be detected, pass through the fifth lens and the diaphragm, are received by the photoelectric detector and are converted into electric signals; and obtaining the position relation between the imaging surface and the diaphragm according to the electric signal, judging the refractive state of the eye to be detected, and calculating the refractive power of the eye to be detected.

Preferably, the eye positioning device comprises: the device comprises a visual axis position adjusting gyroscope, a monitor, a charge coupler, a tenth lens and a forehead support adjusting frame, wherein an image of a tested eye is converted into an electric signal through the charge coupler and then displayed on the monitor, the forehead support adjusting frame is used for adjusting the head position of the tested person, and the visual axis position adjusting gyroscope is used for adjusting the position and the direction of the multi-dimensional detector so that the visual axis of the tested eye coincides with the optical axis of the multi-dimensional detector.

Preferably, the retinal split image focusing device includes: the device comprises a retina focusing light source, a first lens, a double-optical wedge, a slit, a third half-transmitting and half-reflecting mirror, a second lens, a CCD optical coupler and a first reflecting mirror;

wherein, the light emitted by the retina focusing light source is focused on the retina of the eye to form a double split image after passing through the first lens, the double optical wedges, the slit, the third half-transmitting and half-reflecting mirror and the first reflecting mirror; the double split image returned from the retina is imaged on a CCD optical coupler through a second lens and converted into an electric signal, and imaged on a monitor.

Preferably, the vision fixation device comprises a sighting mark light source, a graph reticle, a first beam splitter prism and a third lens;

the light emitted by the sighting target light source irradiates on the graphic reticle, the graphic on the graphic reticle is mapped onto the first light splitting prism, and then the first light splitting prism passes through the third lens and the second semi-transparent semi-reflective mirror, so that the eyes see a distant sighting target graphic to form eye fixation.

Preferably, the auxiliary focusing device comprises a lens group consisting of a focusing lens and an eleventh lens, when the auxiliary focusing device is used for detecting the ametropia of the eye, the position of the two lenses is finely adjusted, so that the visual axis of the eye can be in line with the optical axis of the multi-dimensional detector, and the detected light is focused to the central position of the surface of the retina.

Preferably, the eye adjustment state fixing device includes: the positioning light source, the seventh lens, the fourth half mirror, the fourth reflector, the annular pore plate, the eighth lens, the cross pore plate, the ninth lens, the fifth half mirror and the fifth reflector;

the positioning light source emits light spots, two light paths are formed through the seventh lens and the fourth half-transmitting and half-reflecting mirror, the first light path forms a cross-shaped image through the cross-shaped pore plate and the ninth lens, the second light path forms an annular image through the fourth reflecting mirror, the annular pore plate and the eighth lens, the cross-shaped image and the annular image irradiate the eye to be detected through the optical axis, and light reflected from the eye is received by the charge coupler and the monitor.

Preferably, the computer control circuit is configured to generate a prescription report with an eye potential accommodation coefficient by an eye accommodation compensation algorithm, and generate a myopia risk rating report and a myopia prevention and control measure recommendation report by a myopia risk level prediction algorithm.

The eye positioning device is used for fixing the head of a tested person and aligning the eyes with the measuring window.

The retina split image focusing device completes the function of measuring and focusing the retina of the eye.

The vision fixation device completes the function of aligning and coinciding the visual axis of the eyes and the visual axis of the measuring instrument.

The auxiliary focusing device completes the focus correction fine adjustment function of eye measurement, and the focusing tends to be accurate.

The eye regulation state fixing device has the functions of eye sighting mark fixation relaxation regulation and eye state fixing.

The reference light optical path processing device completes the optical path conversion function of the optical low-coherence interferometry reference light.

The optical low coherence interferometry and refraction measuring device completes diopter measurement, data acquisition of optical interference biological axial measurement, diopter fitting correction algorithm, myopia risk grade prediction algorithm, intelligent analysis and calculation and test result output function.

The refraction measuring device filters an infrared light source through an optical filter, so that light becomes invisible infrared light, a detected person cannot see a test sighting mark, an infrared emitter emits infrared light which irradiates to a retina of the detected eye through an optical component, reflected light of the retina is projected to a detector through an optical system, a measured optical signal is converted into an electric signal, the electric signal is compared with a reference electric signal output by a diaphragm, and refraction data of the detected eye are obtained through analysis and calculation of a computer.

The optical low coherence interferometry device divides light emitted by a detection light source into two beams through an optical fiber coupler, one beam enters eyes (namely signal light), the other beam irradiates a reflector, reference light is formed through a reference light optical path processing device, the signal light reflected by each structural layer of the eyes and the reference light reflected by the reflector enter a photoelectric detector for interference comparison, and position information of different depths of the eyes can be obtained after the signal light and the reference light are processed by a computer. Adjusting different parts of the focus test eye, axial data of the eye can be measured: corneal thickness, lens thickness, axial length of the eye, retinal thickness.

The computer calls an eye adjusting force algorithm according to the measured refraction data and the age information of the measured person, and the eye lens prescription with the adjusting force coefficient is analyzed and calculated. And calling historical data of the visual axis length and the lens thickness of the eyes according to the measured data of the visual axis length and the lens thickness, calling a myopia risk evaluation algorithm to analyze and calculate the myopia risk level of the eyes, giving myopia prevention and control measures, and forming a myopia risk level prediction and prevention and control suggestion report.

Drawings

FIG. 1 is a block diagram schematically illustrating the structure of the present invention;

FIG. 2 is a block diagram of a schematic configuration of an optical transmission measurement unit of the present invention;

FIG. 3 is a block diagram illustrating the structure of a computer control unit according to the present invention;

FIG. 4 is a schematic diagram of the optical system component of the present invention;

reference numerals in fig. 4 denote:

2101-adjusting the gyro in the position of the visual axis; 2102-monitor; 2103-a charge coupler; 2104-tenth lens; 2105-forehead support adjusting bracket; 2201-retinal focusing light source; 2202-a first lens; 2203-double wedge; 2204-slit; 2205-third half mirror; 2206-second lens; 2207-CCD optical coupler; 2208-first mirror; 2301-sighting target light source; 2302-graphic reticle; 2303-a first beam splitting prism; 2304-a third lens; 2401-a focusing lens; 2402-an eleventh lens; 2501-a first detection light source; 2502-fourth lens; 2503-second mirror; 2504-grating drum; 2505-second beam splitting prism; 2506-fifth lens; 2507-stop; 2508-sixth lens; 2509-photodetector; 2510-a second detection light source; 2511-an optical fiber; 2512-a first fiber collimator; 2513-a second fiber collimator; 2514-focus linkage; 2515-a third mirror; 2516-first half mirror; 2517-a second half mirror; 2601-positioning a light source; 2602-a seventh lens; 2603-a fourth half mirror; 2604 — a fourth mirror; 2605-an annular orifice plate; 2606-an eighth lens; 2607-a cross-shaped orifice plate; 2608-a ninth lens; 2609-a fifth half mirror; 2610-fifth mirror; 2701-rotating prism; 2702-total reflection mirror; 2703-sixth mirror; 2704-seventh mirror; 2705-eighth mirror; 2706-ninth mirror.

FIG. 5 is a flow chart of an eye accommodation algorithm of the present invention;

FIG. 6 is an algorithm table of myopia risk rating data of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention with reference to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6 should be construed to limit the scope of the present invention, and those skilled in the art should understand that the present invention is not limited to the embodiments, and that the functional, methodical, or structural equivalents or substitutions made by the embodiments are within the scope of the present invention.

The multi-dimensional detector of the embodiment comprises a computer control circuit 100, an optical conduction measuring component 200, an input/output component 300, a power supply circuit 400 and a case component 500.

The control configuration of the computer control circuit 100 is shown in fig. 3, and comprises a computer central processing unit 110, an algorithm data storage 120, an optical system component control driving circuit 200, a command input keyboard 310, a report output printer 320, a USB communication interface 330, and a display 340.

The computer central processing unit 110 is a single-chip computer processor and a typical peripheral configuration circuit, and it forms a control center of the multi-dimensional detector, and controls the work flow and work state of each component of the whole machine under the management of a driving program.

The algorithm data memory 120 is used for storing calculation methods of eye refraction measurement and axial parameter measurement of the multi-dimensional detector, an algorithm for predicting myopia risk level, and an algorithm for adjusting eyesight of teenagers, and is an expansion data program memory of the computer central processing unit 110 unit.

The command input keyboard 310 is a manual data input end of the multi-dimensional detector and is used for inputting characteristic data such as age, sex, identification codes and the like of a detected person, and a hardware key, a touch screen soft key and a multi-dimensional detector code scanning input mode can be adopted in the design of the command input keyboard.

The report output printer 320 is an embedded POS58 printer, is used as a print output device for outputting data of the multi-dimensional detector, can be provided with a USB interface, is externally connected with a general printer, and prints an optometry lens matching list added with an eye accommodation power coefficient, an eye myopia risk evaluation report and an eye myopia prevention and control measure suggestion report.

The USB communication interface 330 is a standard USB serial communication interface, realizes the networking output and calling of test data, can expand and add an RJ45 universal network interface, and provides interface options for equipment networking. The communication interface circuit adopts a universal USB circuit and an RJ45 universal network interface circuit, and calls a communication interface driver to complete interface communication under the control of the central processing unit 110 of the computer.

The display 340 is an embedded liquid crystal display of the multi-dimensional detector, dynamically displays the position state of the tested eye under the control of a computer, provides a visual data image for a measurer to adjust the man-machine state and confirm the result, displays the measuring result and the content of an evaluation report, and provides a decision basis for a tester to provide an output result report.

Referring to fig. 2 and 4, the optical system component control driving circuit 200 includes an eye positioning device 2100, a retinal split image focusing device 2200, a vision fixing device 2300, an auxiliary focusing device 2400, an optical low coherence interferometry and refraction measuring device 2500, an eye adjustment state fixing device 2600, and a reference optical path processing device 2700.

The eye positioning device 2100 comprises a visual axis position adjusting gyroscope 2101, a monitor 2102, a charge coupler 2103, a tenth lens 2104 and a forehead support adjusting bracket 2105, and the eye positioning function is completed. The system has the function of ensuring that the eye axis of the tested eye is basically coincident with the optical axis of the instrument so as to prepare for accurate measurement. The working process is that an operator instructs a tested person to place the head on the forehead support adjusting frame 2105 by watching the monitor 2102, the forehead support adjusting frame can be adjusted in position, an eye image is converted into an electric signal through the charge coupler 2103 to be displayed on the monitor 2102, the position and the direction of the detector can be adjusted through the visual axis position adjusting gyroscope 2101 device by the detector, the position of the optical axis of the detector is further adjusted, and the visual axis of the tested eye is convenient to be basically coincided with the optical axis of the detector.

The retinal split image focusing device 2200 comprises a retinal focusing light source 2201, a first lens 2202, a double-optical wedge 2203, a slit 2204, a third half mirror 2205, a second lens 2206, a CCD optical coupler 2207 and a first reflector 2208, and completes the focusing and positioning functions of the surface of the retina of the eye. The working process is that the retina focuses light emitted by the light source 2201, and the light is focused on the retina of the eye to form double-split images through the first lens 2202, the double-optical wedge 2203, the slit 2204, the third half-transmitting and half-reflecting mirror 2205 and the first reflecting mirror 2208, when the focusing light spot is focused on the retina, the double-split images formed on the retina are aligned, otherwise the double-split images are staggered, the double-split images returned from the retina are imaged on the CCD optical coupler 2207 through the second lens 2206 to be converted into electric signals, and the electric signals are imaged on a monitor after being processed by a computer, so that an operator can monitor and adjust the double-split images.

The vision fixing device 2300 comprises a sighting target light source 2301, a graphic reticle 2302, a first beam splitter prism 2303 and a third lens 2304, and the function of coincidence alignment of the visual axis of the eye and the optical axis of the measuring instrument is completed. The working process is that the light emitted by the sighting target light source 2301 irradiates on the graphic reticle 2302, the graphic on the graphic reticle is mapped onto the first light splitting prism 2303, and then the first light splitting prism 2303 passes through the third lens 2304 and the second half-transmitting half-reflecting mirror 2517, so that the eyes can see a distant sighting target graphic, and the eyes can watch the sighting target graphic fixedly.

The auxiliary focusing device 2400 comprises a focusing lens 2401 and an eleventh lens 2402, and is used for a patient with ametropia, and has a function of adjusting the positions of the two lenses to focus the detection light onto the surface of the retina. The working process is that for eyes with normal refraction, the focal points of the two lenses of the focusing lens 2401 and the eleventh lens 2402 are superposed with the visual axis of the eyes, and for eyes with abnormal refraction, the positions of the two lenses are finely adjusted, so that the visual axis of the eyes is superposed with the visual axis of an instrument, and the detected light is focused to the central position of the surface of the retina.

The eye adjustment state fixing device 2600 includes a positioning light source 2601, a seventh lens 2602, a fourth half mirror 2603, a fourth reflector 2604, an annular aperture plate 2605, an eighth lens 2606, a cross-shaped aperture plate 2607, a ninth lens 2608, a fifth half mirror 2609, and a fifth reflector 2610, and completes a focusing and positioning function of an eye measurement site. The device has the effects of ensuring that the eye axis of the measured eye coincides with the optical axis of the instrument and keeping the object space focus of the measuring objective lens proper from the vertex position of the cornea so as to ensure the accuracy of optometry. The working process is that a light source 2601 is positioned to emit light spots, two light paths are formed through a seventh lens 2602 and a fourth half mirror 2603, the first light path forms a cross-shaped image through a cross-shaped pore plate 2607 and a ninth lens 2608, the second light path forms an annular image through a fourth reflector 2604, an annular pore plate 2605 and an eighth lens 2606, the cross-shaped image and the annular image irradiate the eye to be detected through an optical axis, the reflected light of the cross-shaped image and the annular image is received by a charge coupler 2103 and a monitor 2102, when the monitor sees that the optical axis of the eye is coincident with the optical axis of the detector, the cross-shaped image is coincident with the annular image, otherwise, the two light paths are adjusted to coincide the cross-shaped image with the annular image, and the optical axis of the eye is coincident with the optical axis of the detector.

The optical low coherence interferometry and dioptric axial measuring device 2500 is a main photoelectric component of the detector, and includes a first detection light source 2501, a fourth lens 2502, a second reflector 2503, a grating drum 2504, a second beam splitter prism 2505, a fifth lens 2506, a diaphragm 2507, a sixth lens 2508, a photoelectric detector 2509, a second detection light source 2510, an optical fiber 2511, a first optical fiber collimator 2512, a second optical fiber collimator 2513, a focus linkage 2514, a third reflector 2515, a first half mirror 2516 and a second half mirror 2517, so as to complete the measurement functions of parameters such as refractive parameters of the eye, thickness of the eye crystal, and length of the eye axis.

When the eye refraction measurement is performed, light spots emitted by the first detection light source 2501 irradiate a grating rotary drum 2504 (the rotary drum is a test sighting target) with a plurality of equal gaps through the fourth lens 2502 and the second reflecting mirror 2503 to generate light spots, the light spots enter the eye to be measured through the second beam splitter 2505 in the rotary drum and the first half mirror 2516, and when the rotary drum rotates around the optical axis of the instrument at a constant speed, the light spots moving at the eye fundus to be measured are formed. The light spot is projected from the eye fundus of the eye to be detected, passes through the fifth lens 2506 and the diaphragm 2507, is received by the photoelectric detector 2509, and the received optical signal is converted into an electric signal by the photoelectric detector. The refractive state of the human eye is determined by inferring the positional relationship between the imaging surface and the stop 2507 from the electrical signals collected by the photodetector 2509. And further calculating the degree of the corrective lens to be worn by the tested eye. The series of analysis, conversion and judgment processes are completed by a computer, and finally, the result is directly displayed. And according to the position relation formed by the eye reflection image and the reference diaphragm, the refractive powers of the emmetropic eye, the myopic eye and the hyperopic eye are given through computer analysis and calculation. The computer calculates the eye accommodation power degree according to the age of the tested person and the eye disparity data and the eye accommodation power compensation algorithm, and intelligently outputs the eye refractive power with the accommodation power coefficient.

The eye accommodation force compensation algorithm is shown in the flow chart of fig. 5. The method specifically comprises the following steps: reading age information, anterior refraction data of the mydriasis, eye correction position, internal inclination and external inclination data, judging the eye power, including astigmatism power, by posterior refraction data of the mydriasis, judging the dispersion condition, checking the external inclination empirical data table of the correction position according to the age and diopter to obtain a correction coefficient when the eye position is corrected, adding the checked refraction correction coefficient and astigmatism correction coefficient with the refraction data after the mydriasis, calculating an adjusted refraction result, and outputting a corrected prescription report. When the external inclination occurs, the correction coefficient is obtained by checking the external inclination empirical data table according to age and diopter, the checked refraction correction coefficient and astigmatism correction coefficient are added with the refraction data after the mydriasis, the adjusted refraction result is calculated, and a correction refraction fitting report is output. When the lens is inclined inwards, the correction coefficient is obtained by checking the inner inclination empirical data table, the checked refraction correction coefficient and astigmatism correction coefficient are added with the refraction data after the pupil is dispersed, the adjusted refraction result is calculated, and a correction refraction lens matching report is output. When there is a variance, the eye accommodation coefficient with small degree is set as zero value, the eye with large degree checks the external oblique empirical data table to obtain the correction coefficient, the checked refraction correction coefficient and astigmatism correction coefficient are added with the refraction data after the astigmatism, the adjusted refraction result is calculated, and the corrected refraction fitting report is output. When there is no dispersion, the correction coefficient is obtained by checking the external inclination empirical data table according to age and diopter, the checked refraction correction coefficient and astigmatism correction coefficient are added with the refraction data after the mydriasis, the adjusted refraction result is calculated, and the corrected refraction fitting report is output.

When the cornea thickness, the anterior chamber depth, the crystal thickness, the eye axis length and the retina thickness are measured, the light spot emitted by the second detection light source 2510 reaches the eye through the optical fiber 2511, the first optical fiber collimator 2512, the focus linkage 2514, the auxiliary focusing lens 2401 and the eleventh lens 2402 to form a reflection light spot, the reflection light spot reaches the photoelectric detector 2509 and is compared with a reference light spot generated by the reference optical path processing device 2700, and the depth value of the reflecting surface of the eye can be calculated by using the phase difference between the reflection light spot and the reference light spot. The focus linkage 2514 is a rotatable disc, 3 lenses are arranged on the disc to focus the detection light on the retina, the crystalline lens and the cornea respectively, the focus linkage 2514 is also provided with 3 reference light paths of which the lenses correspond to the retina, the crystalline lens and the cornea, the rotating position of the rotating prism 2701 is correspondingly controlled, reference light spots are generated by the total reflection mirror 2702, the sixth reflection mirror 2703, the seventh reflection mirror 2704, the eighth reflection mirror 2705 and the ninth reflection mirror 2706, and the reference light spots are compared with the detection light spots to calculate the parameters such as the thickness of the crystalline lens and the length of the axis of the eye. The eye accommodation coefficient, the length of the eye axis and the lens thickness data are input or called by a command input keyboard 310, and the computer gives an accurate myopia risk judgment and prevention and control treatment scheme according to a myopia risk grade prediction algorithm.

The myopia risk level prediction algorithm is shown in figure 6.

The invention has the characteristics that:

1. one machine is used for measuring diopter, eye axis length and lens thickness;

2. the scheme of the optometry lens fitting for intelligently pushing the potential eyesight regulating power coefficient of the children and the teenagers reduces the damage of the degree of the misfitted glasses to the eyesight of the eyes on a large scale.

3. And intelligently pushing the myopia risk level of the teenagers and the personalized myopia prevention and control scheme.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the objects of the present invention can be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.