CN108371539B - Eye adjusting force detection device and method - Google Patents
Eye adjusting force detection device and method Download PDFInfo
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- CN108371539B CN108371539B CN201810116153.0A CN201810116153A CN108371539B CN 108371539 B CN108371539 B CN 108371539B CN 201810116153 A CN201810116153 A CN 201810116153A CN 108371539 B CN108371539 B CN 108371539B
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/0075—Apparatus for testing the eyes; Instruments for examining the eyes provided with adjusting devices, e.g. operated by control lever
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/103—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
Abstract
The invention discloses an eye adjusting force detection device and method, wherein the device comprises a body and an intelligent terminal, and the intelligent terminal is in data communication with the body in a wireless mode; the body comprises a shell which is convenient for the head of a tested person, a lens group for changing the optical path and a slit sheet with a light-passing hole for testing the diopter of eyes are sequentially arranged in the inner cavity of the shell from far to near, and a controller for adjusting and processing and displaying the detection result of the eye adjusting force is arranged on the shell; the lens group comprises at least one convex lens and a concave lens which are coaxially arranged, the convex lens is arranged close to the slit sheet, and the concave lens changes the position in the shell through an adjusting mechanism arranged on the shell; the human eyes are located at the front end of the light path of the body, and the intelligent terminal is embedded in the terminal of the body. When the adjusting force of the eyes is measured, the single eye is required to be tested, the adjusting force of the eyes can be objectively measured, and the method has the advantages of high adjusting force measuring precision and wide adjusting range measuring range.
Description
Technical Field
The invention relates to the technical field of optical equipment, in particular to a device and a method for detecting eye adjusting force.
Background
The eyes of a person are the most precise organs on the human body, and the working environments of the eyes are greatly different (such as different distances and different illumination conditions, etc.), so the eyes are required to be adjusted according to different working environments so as to clearly see external objects.
For a normal eye, the external parallel rays pass through the refractive system of the eye in a completely relaxed state, called the emmetropic eye, where the refractive power of the eye is called the static refractive power of the eye, forming a focal point on the retina. However, in daily life, such as fine work and learning, where an object is located closer to the eye, divergent light from the object is focused behind the retina, and the eye is required to change its refractive state, in which the eye presents an image of the object on the retina, a phenomenon in which the eye sees a near object by changing the refractive power of the eye, called accommodation of the eye, and the refractive power of the eye in this state is called the dynamic refractive power of the eye.
The change in refractive power of the eye is mainly a change in lens power, and there are two factors: the plasticity of the lens and the stretching of the ciliary muscles. Contraction of ciliary muscle causes deformation of crystalline lens, increases refractive power, and the two are coordinated to realize eye adjustment. If the accommodative effort is weakened or completely lost due to the weakening of physiological muscle strength, the ciliary muscle needs to be continuously tensed to overcome the insufficient accommodation, often causing tension of the ocular muscle and visual fatigue; on the other hand, due to the progressive loss of plasticity of the lens as a result of aging, the accommodation capacity of the eye may decline, the so-called presbyopia, also known as presbyopia.
When the eye is in a relaxed state, the distance between the far object and the object-side principal point of the eye, which is called the far point distance of the eye, is called the accommodation far point of the eye, and the reciprocal of the far point distance is the static diopter, by virtue of its static diopter power, focuses the far light on the retina. When the eye needs to distinguish the details of the near object, an adjusting function is used, when the eye uses the maximum adjusting force, the nearest point in front of the eye which can be seen clearly is the adjusting near point of the eye, the distance between the nearest point and the main point of the object side of the eye is the near point distance of the eye, when the eye uses the adjusting, the reciprocal of the near point distance is dynamic diopter, the distance between the adjusting near point and the far point is called an adjusting range, and the range between the static diopter and the maximum dynamic diopter is called an adjusting range, namely the adjusting force in the general sense.
The front eye is infinitely far from seeing to 5m, the change of the adjusting force is 0-0.2D, only 0.2D of adjustment is used, and infinite adjustment range change is realized. The far point of the myopia is within a certain distance, the adjusting range is relatively small, and the concave lens is required to make up for the refraction defect; the far point of presbyopia is located behind the eyeball, and no matter what distance the far point is used for watching, the regulation is needed, so that the probability of visual fatigue caused by the regulation is high, and the convex lens is required to correct the refraction defect.
Accommodation, convergence and pupil constriction of the eye are linked together while looking at near objects, a triple motion known as near reflection. Collective accommodation by the eye collection would result in a binocular measurement of about 0.5D more amplitude than a monocular measurement. Thus, a single eye measurement will result in more accurate eye accommodation amplitude data.
The accommodation amplitude is an important index for the response of accommodation function, and is measured by the push-in method, the distance-shift method and the negative lens method. The approach method is to gradually increase the divergence of light rays through gradual pushing of the sighting target to stimulate eyes of a person to generate adjustment, and the specific method is to place the sighting target plate in front of the eyes, slowly move the sighting target plate from far to near until the sighting target is blurred, slightly move the sighting target plate backwards to a position capable of being seen clearly, and measure the distance between the top ends of the sighting target angle films, wherein the position is the near point of eye adjustment, and the adjustment amplitude of the eyes can be obtained by combining the ametropia of a person to be measured. The distance-moving method is to place the optotype 5cm in front of the eyes, gradually far away from the eyes to find the near point of the eyes to be measured. Negative lens laws are the values that stimulate accommodation by adding a negative lens in front of the eye to obtain the amplitude of accommodation. All the above methods are subjective measurement methods, require a person to be measured to judge clear and fuzzy boundaries of near visual marks, require guidance of a technician with abundant experience and communicate with the person to be measured, have large fluctuation of accuracy of detection results, and are not suitable for adults with speech communication disorder or infants with incomplete language functions. The method for measuring accommodation also includes a dynamic imaging method, in which even if two eyes of a subject watch a near target, both eyes are in an active state, so that the degree of accommodation of the two eyes can be measured, and the near point of accommodation of the eyes can be objectively measured, but the method is adequate in that very sophisticated imaging technology and experience are required. In addition, the automatic objective optometry device realized by the computer has the advantages of rapidness, accuracy and high price.
The regulating action of eyes enables a human to see objects from the front of eyes to a long distance, and the regulating action of eyes has great significance for daily life of the human. With the development of industry and the progress of technology, the demands of near-distance work of human eyes are increasing in modern life, on one hand, the loss of near-time adjustment (presbyopia) and physiological changes (eye adjustment cramps, paralysis, fatigue, functional insufficiency, etc.) of human eyes can cause near-eye difficulties, and work and study are influenced; on the other hand, heavy work tasks in close range make the eyes overburdened, coordination and balance of near reflection of the eyes are difficult to maintain, and the accommodation capacity of the eyes is reduced or abnormal, which affects daily life. Especially teenagers in schools, because the heavy learning task forces eyes to be in tension for a long time, muscles become spasticity, pseudomyopia is caused, far vision which is represented by positive vision and slight far vision is reduced, and near vision is still normal. Pseudomyopia caused by accommodation spasticity is a frequent condition of reduced vision in school students.
Measurement of eye accommodation is of great utility in preventing vision loss in students and early detection of physiological abnormalities in eye accommodation. The traditional eye adjustment capability detects ophthalmic hospitals or clinics for diagnosis, large expensive instruments and complex means are used for refraction evaluation, technical staff and a detected person are required to conduct language interaction in the detection process, the labor cost is high, the detection method is difficult to be suitable for people with low age or hearing impairment, and meanwhile, the detection means is unfavorable for high-frequency monitoring evaluation of the adjustment capability.
Disclosure of Invention
The invention aims to provide a portable eye adjusting force detection device and a portable eye adjusting force detection method, which can accurately measure the adjusting capacity of eyes and provide references for visual quality assessment of the eyes.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
An eye adjusting force detection device comprises a body and an intelligent terminal for graphic display, man-machine interaction and data processing, wherein the intelligent terminal is in data communication with the body in a wireless or wired mode; the body comprises a shell which is convenient for the head of a tested person, two groups of test assemblies for respectively testing two eyes are arranged in parallel in the inner cavity of the shell, and a control mechanism which is used for changing the state of the test assemblies in the shell to change the light path length and can realize mutual communication with the intelligent terminal is arranged on the shell; the human eyes are located at the tail end of the light path of the body, and the intelligent terminal is embedded at the initial end of the light path of the body.
The above-mentioned an eye adjusting force detecting device, the said test assembly includes lens group which is located in the shell and changes the optical path and has slit sheet for realizing measurement; the slit sheet is arranged close to a shell at one end of the tested person, and the lens group is arranged in the shell between the slit sheet and the intelligent terminal.
The above-mentioned eye accommodation force detection device, the lens group includes at least a pair of convex lens and concave lens of coaxial setting, and wherein convex lens is close to the slit sheet setting, and concave lens is located in the casing between convex lens and the intelligent terminal.
In the eye adjusting force detecting device, the testing component changes the position in the shell through the linear transmission component arranged on the shell; the linear transmission assembly comprises a transverse moving mechanism for adjusting the whole testing assembly to move left and right in the shell and a longitudinal adjusting mechanism for adjusting the concave lens in the testing assembly to move back and forth in the shell, and controlled ends of the transverse moving mechanism and the longitudinal moving mechanism are respectively connected with an output end of the control mechanism.
The eye adjusting force detection device comprises the substrate which is arranged in the shell and has the incident light selection function, wherein two parallel slit seams or two opposite small holes are vertically formed in the position, corresponding to the eyes of the tested person, of the substrate, and the distance between the two slit seams or the small holes is 2.5+/-2 mm.
The control mechanism comprises an operation knob, an electronic sensor, a signal processing unit and a communication unit, wherein the signal processing unit is respectively connected with the operation knob and the electronic sensor, and the signal processing unit is mutually communicated with the intelligent terminal through the communication unit.
According to the eye adjusting force detection device, the intelligent terminal respectively displays the test pattern and the shielding pattern on the screen for the tested eye and the relaxed eye in the measurement state, wherein the test pattern is a single background and two parallel vertical bars with different colors, and the shielding pattern is a black background.
An eye accommodation force detection method specifically comprises the following steps:
1) Placing the intelligent terminal at the initial end of the optical path of the body;
2) The eyes are tightly attached to the tail end of the light path of the body;
3) Realizing binocular image combination;
4) Measuring the distance point value of the eye and calculating the static refractive power;
5) Measuring the accommodation near point value of the eye and calculating the dynamic refractive power;
6) The accommodation range and the accommodation amplitude of the eye are calculated according to steps 4) and 5).
The specific method for realizing the binocular imaging in the step 3) is as follows: after the testee wears the body, the positions of eyes and the positions of the test components in the left-right direction in the shell are adjusted to realize binocular imaging, and when the eyes are imaged, the relaxation pattern and the measurement pattern on the screen of the intelligent terminal are combined into one.
The specific method for measuring the eye adjusting force in the step 4) adjusting the far point value comprises the following steps: under the eye relaxation state, changing the pattern displayed on the intelligent terminal through the control mechanism, so that one side of the intelligent terminal corresponding to one eye displays a relaxation pattern, and the other side of the intelligent terminal corresponding to the measured eye displays a measurement pattern; firstly, the control mechanism is adjusted to realize the double-eye image combination, the adjustment control mechanism gradually reduces the distance between the red and green strips in the measurement pattern,when the tested eyes watch that the red and green stripes in the measurement pattern on the intelligent terminal are overlapped and changed into yellow stripes, the adjustment is stopped, a control mechanism is triggered, the control mechanism sends a signal to the intelligent terminal, and the intelligent terminal calculates an adjustment far point value d of the tested eyes according to the distance between the red and green stripes Far distance According to d Far distance Calculating the refractive power P of the distance point Far distance 。
The specific measurement method for the eye adjusting force detection method, in the step 5), for adjusting the near point value is as follows: the front and back positions of the concave lens in the testing component in the shell are adjusted through the operation control mechanism, and the visual distance from the simulated eyes to the intelligent terminal for displaying images is changed; the pattern seen by the eyes of the tester will be clear from blurring until the optotype seen by the eyes of the tester is blurred again; at this time, the distance between the red and green stripes is changed until the measured eye looks at Huang Setiao, the operation is stopped, the control mechanism is triggered and is confirmed, the control mechanism sends a signal to the intelligent terminal, and the intelligent terminal calculates the adjustment near point value d of the measured eye according to the moving distance of the concave lens and the distance between the red and green optotypes under the moving distance Near-to-near According to d Near-to-near Calculating the power P for adjusting the near point Near-to-near 。
In the above method for detecting eye accommodation force, in the step 6), the accommodation force includes an accommodation range and an accommodation amplitude, and the accommodation range is calculated to adjust the far point value d Far distance And adjusting the near point value d Near-to-near Obtained by calculating the adjustment amplitude for adjusting the near-point refractive power P Near-to-near And adjusting distance point power P Far distance Obtained by the difference of (c).
By adopting the technical scheme, the invention has the following technical progress.
The invention uses the intelligent terminal (such as a mobile phone and the like) as the equipment for display, realizes the detection of the eye adjustment capacity by means of the adjustment force detection device body, has low cost, simple interaction form and convenient operation, and the detection judgment is realized in a subjective mode with obvious limit and has high accuracy.
When the invention is used, the self regulating force can be conveniently and objectively detected without the assistance of a third person or even a third person with abundant experience, a basis is provided for realizing the evaluation and prediction of visual quality, and the process of converting pseudomyopia into true myopia can be timely found, so that the purpose of restoring the emmetropic eye is achieved by timely training and intervening the visual function in the pseudomyopia stage, the occurrence of true myopia is avoided, and a good effect is achieved for preventing the teenager myopia.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of another embodiment of the present invention;
FIG. 3 is an optical schematic diagram of the present invention in performing a near point value adjustment test.
Wherein: 1. the lens group, the crack piece, the eye and the intelligent terminal are arranged in the shell, the lens group, the crack piece, the eye and the intelligent terminal.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The utility model provides an eye regulating power detection device, includes body and intelligent terminal, and the body is used for changing light optical path, and intelligent terminal 5 is used for graphic display, human-computer interaction and data processing, and intelligent terminal carries out data communication with the body through wireless or wired mode.
Since the static refractive power of the eye is completely relaxed and the dynamic refractive power of the eye is different when the eye is regulated, the eye is required to be completely relaxed when the dynamic refractive power is measured, the eye is required to be regulated when the eye is regulated to watch a fine visual target at a near position, at the moment, if the visual distance of the visual target of a screen at a fixed position is shortened by utilizing a concave lens, the eye can regulate to see the visual target clearly, the refractive power of the eye under the condition of regulating the dynamic refractive power, namely, the near point dynamic refractive power, of the eye can be measured, the concave lens is far away from the screen, namely, is close to the eye, the image of the red-green visual target can be regulated to see the visual target clearly, the distance is continued to be shortened, the regulating capability of the eye can reach a limit, the visual target is blurred, the distance between the red-green visual targets is changed at the moment, the red-green visual target is overlapped and yellow through the slit, and the dynamic refractive power of the eye is measured through the distance between the concave lens and the visual target. Based on the principle, the invention adopts a double-cylinder structure to test the eyes of the tested person respectively.
Specifically, the body of the invention comprises a shell 1 which is convenient for the head of a tested person, two groups of test components for respectively testing two eyes are arranged in parallel in the inner cavity of the shell 1, and a control mechanism is arranged on the shell and used for changing the state of the test components in the shell to change the light path length and realizing mutual communication with the intelligent terminal; the human eyes are located at the tail end of the light path of the body, and the intelligent terminal is embedded at the initial end of the light path of the body.
The testing component comprises a lens group 2 which is positioned in the shell and is used for changing the optical path from far to near and is provided with a light-passing hole for realizing the measurement, and a slit sheet 3; the slit sheet is arranged close to the shell at one end of the tested person, and the lens group is arranged in the shell between the slit sheet and the intelligent terminal.
The lens group is used for enlarging or reducing the measurement pattern displayed by the intelligent terminal and changing the light path length of the measurement pattern. The intelligent terminal comprises at least one pair of convex lenses and concave lenses which are coaxially arranged, wherein the convex lenses are arranged close to the slit sheet, and the concave lenses are positioned in a shell between the convex lenses and the intelligent terminal. The lens can be a spherical lens, a cylindrical lens, an aspherical lens or a Fresnel lens; of course, the lens group constituted by the concave lens and the convex lens may be a single lens or a double cemented lens. When the device is used for testing eyes of a tested person, the centers of the tested eyes, the crack piece, the convex lens, the concave lens and the intelligent terminal test pattern are kept on the same optical axis; the slit sheet on the light path between the other eye and the intelligent terminal shielding pattern is screwed out of the shell, or the slit sheet is shielded by a baffle sheet.
Of course, for convenient operation, the lens group can be further provided with three lenses, namely a concave lens and two convex lenses which are arranged in parallel left and right, and the slit piece, the outer convex lens and the concave lens are correspondingly arranged in a cylindrical light cylinder from front to back, as shown in fig. 2; in operation, the outer diameter distance of one lens of the adjusting component is only required to be moved left and right integrally, so that whether the two eyes are in a tested state or not can be changed. When the device is used for testing eyes of a tested person, the centers of the tested eyes, the cylindrical optical barrel internal device and the intelligent terminal test pattern are kept on the same optical axis; only the inner convex lens is reserved on the light path between the other eye and the intelligent terminal shielding pattern.
The slit sheet is used for measuring the refractive power of eyes and comprises a substrate which is arranged in the shell and has an incident light selection function, and a light transmission hole is formed in a position, corresponding to eyes of a tested person, of the substrate. The substrate can be made of a light-tight material or a semi-transparent material; the substrate is provided with an incident light selection device, and the incident light selection device is an optical filter or a polarized light selection sheet; the light passing holes can be straight slits, small holes or small hole arrays. In the embodiment, the slit sheet is used for mounting an optical filter with selectivity to the optical wavelength on a substrate made of opaque materials so as to eliminate the mutual crosstalk; and two parallel slit structures are arranged on the optical filter, and the distance between the two parallel slit structures corresponds to the pupil diameter of the eye and is 2.5+/-2 mm.
The linear transmission assembly is arranged on the shell, and the testing assembly changes the position in the shell through the linear transmission assembly, so that the change of the light path length is realized. The linear transmission assembly comprises a transverse moving mechanism for adjusting the whole testing assembly to move left and right in the shell and a longitudinal adjusting mechanism for adjusting the concave lens in the testing assembly to move back and forth in the shell. The structure of the linear transmission assembly is preferably a mechanical structure of a button, a knob and a gear transmission.
The lateral movement mechanism and the longitudinal movement mechanism are preferably controlled automatically, but may be manually operated. Under the automatic control mode, the controlled ends of the transverse moving mechanism and the longitudinal moving mechanism are respectively connected with the output end of the control mechanism. However, whether the automatic control mode or the manual control mode is adopted, the synchronous change of the lens in the shell, the hole in the crack piece and the icon in the measurement pattern of the intelligent terminal can be realized by adopting modes such as light sense conduction, electronic conduction or information conduction.
In another embodiment of the present invention, the slit sheet adopts a liquid crystal optical phase modulation device, that is, a regularly arranged array of small holes is arranged on a non-transparent glass substrate, the array of small holes is filled with a liquid crystal material, and the liquid crystal material generates phase modulation on light passing through the liquid crystal material under the control of an applied electric field so as to control whether the light can pass through the small hole area.
The control mechanism comprises an operation knob, an electronic sensor, a signal processing unit and a communication unit, wherein the signal processing unit is respectively connected with the operation knob and the electronic sensor, and the signal processing unit is mutually communicated with the intelligent terminal through the communication unit. The tested person changes the position state of the testing component in the shell through the linear transmission component by operating the operation button, when the eyes of the tested person can meet the set requirement in the moving process of the device in the testing component, the tested person triggers the signal processing unit of the control mechanism, at the moment, the electronic sensor transmits the measured displacement distance of the relevant device in the current testing component to the signal processing unit for processing, the signal processing unit transmits the processed displacement distance to the intelligent terminal through the communication unit, and the intelligent terminal calculates corresponding performance parameters; after the eye test of the tested person is completed, the intelligent terminal performs visual display of the measured value.
The intelligent terminal in the invention must have a display screen for displaying the measurement pattern, the shielding pattern, the relaxation pattern, and the measurement result and the intervention information. The screen can be black and white or colored, and a colored screen is selected in the invention; the loosening pattern can be a geometric figure, a natural scene, a static image or a dynamic image, and the loosening pattern is preferably a colored static natural scene with a depth of field characteristic; the shielding pattern is a pure black background; the measurement pattern is two red-green bar patterns in a black background. The intelligent terminal can be a smart phone, a cellular phone, a multimedia playing device, an IPAD and other devices.
The intelligent terminal can also load embedded software for realizing man-machine interaction and acquisition of tested person information. The manner of realizing man-machine interaction can adopt a physical connection mechanical structure, a touch screen, a voice input/output part, bluetooth or other wireless peripherals. The information of the tested person comprises self physiological data, behavior habit data and external influence factors; wherein the physiological data of the human body comprises age, height, weight, distance and near pupil distance, and binocular vision functions such as eye position, distance point adjustment, near point adjustment, adjusting force, color vision, stereoscopic vision and the like; the behavior habit data comprises reading and writing habits, exercise habits, eating habits, work and rest habits, hygiene habits and the like; external influencing factors include daily eye environment states, lighting conditions, various learning life peripheral states, genetic factors and the like.
The intelligent terminal is also provided with a data processing unit, a storage unit and a data receiving and transmitting unit so as to realize the processing, storage and receiving and transmitting of data.
The eye adjusting force detection method by adopting the eye adjusting force detection device comprises an adjusting range and an adjusting amplitude, wherein the adjusting force detection is to calculate the adjusting range of the eye by measuring the adjusting near point and the adjusting far point of the eye of a tested person, and the adjusting range is in length units and in mm; meanwhile, the adjusting amplitude of the eye can be calculated according to the refractive power of the adjusting near point and the refractive power of the adjusting far point, wherein the adjusting amplitude is a refractive power unit, and the unit is diopter. The method specifically comprises the following steps:
1) And placing the intelligent terminal at the initial end of the optical path of the body.
2) The eyes are attached to the tail end of the light path of the body.
3) And realizing the binocular imaging.
The specific method for realizing the binocular imaging comprises the following steps: after the testee wears the body, the positions of eyes and the positions of the test components in the left-right direction in the shell are adjusted to realize binocular imaging, and when the eyes are imaged, the relaxation pattern and the measurement pattern on the screen of the intelligent terminal are combined into one. After the binocular imaging is realized, eyes of a tested person are in a relaxed state, namely, the eyes are visual to infinity, and the measurement of the distance point is convenient to adjust.
4) The accommodation distance point value of the eye is measured and the static refractive power is calculated.
The specific method for adjusting the measurement of the far point value is as follows: in the eye-relaxed state, the eye is changed by the control mechanismChanging the pattern displayed on the intelligent terminal, so that one side of the intelligent terminal corresponding to one eye displays a relaxed pattern, and the other side of the intelligent terminal corresponding to the measured eye displays a measured pattern; under the condition of realizing binocular imaging, the adjustment control mechanism gradually reduces the distance between the red and green strips in the measurement pattern, when the tested eyes watch that the red and green strips in the measurement pattern on the intelligent terminal are overlapped and changed into yellow strips, the adjustment is stopped, the control mechanism is triggered, the control mechanism sends signals to the intelligent terminal, and the intelligent terminal calculates an adjustment far point value d of the measured eyes according to the distance between the red strips and the centers of the green strips Far distance According to d Far distance Calculating the refractive power P of the distance point Far distance 。
5) The accommodative near point value of the eye is measured and the dynamic power is calculated.
The specific measurement method for adjusting the near point value comprises the following steps: adjusting the front and back positions of the concave lens in the testing component in the shell through the operation control mechanism, and simulating the change of the visual distance from eyes to the intelligent terminal display image; the pattern seen by the eyes of the testee becomes clear from blurring, the pattern moves until the optotype seen by the eyes of the testee becomes blurring again, at this time, the distance between the red and green strips is changed, until the eyes of the testee watch the superposition of the red and green strips in the measurement pattern as Huang Setiao, the operation is stopped and confirmed, the control mechanism is triggered, a signal is sent to the intelligent terminal by the control mechanism, and the intelligent terminal calculates the adjustment near point value d of the eyes to be measured according to the moving distance of the concave lens and the distance between the red and green optotypes under the moving distance Near-to-near According to d Near-to-near Calculating the power P for adjusting the near point Near-to-near 。
In a possible embodiment of the present invention, the focal length of the concave lens is f1, the focal length of the convex lens is f2, the slit gap distance is a, in an initial state (i.e. when measuring and adjusting the far point), the distance between the concave lens and the convex lens is m, and when the distance of the concave lens moving toward the convex lens is x and the distance between the red and green optotypes is c, the near point is adjusted by:
the optical principle of the accommodation near point test is shown in fig. 3.
6) The accommodation range and the accommodation amplitude of the eye are calculated according to steps 4) and 5).
The adjusting range adjusts the far point value d by calculating Far distance And adjusting the near point value d Near-to-near Obtained by calculating the adjustment amplitude for adjusting the near-point refractive power P Near-to-near And adjusting distance point power P Far distance Obtained by the difference of (c).
When measuring the adjusting force of eyes, the measuring of the adjusting distance point needs binocular measuring, one eye watches the relaxing pattern in front of the other eye watches the testing pattern, and the measuring is carried out under the condition of realizing binocular imaging; the measurement of the adjusting near point needs to be tested by a single eye, one eye views the measurement pattern, and the other eye can be conducted under the shielding pattern, so that the adjusting force of the eye is objectively measured, and the method has the advantages of high measuring precision of the adjusting force and wide measuring range of the adjusting force.
Claims (7)
1. The eye adjusting force detection device is characterized by comprising a body and an intelligent terminal (5) for graphic display, man-machine interaction and data processing, wherein the intelligent terminal is in data communication with the body in a wireless or wired mode; the body comprises a shell (1) which is convenient for the head of a tested person, two groups of test assemblies for respectively testing two eyes are arranged in parallel in the inner cavity of the shell (1), and a control mechanism which is used for changing the state of the test assemblies in the shell to change the light path length and can realize mutual communication with the intelligent terminal is arranged on the shell; the human eye is positioned at the tail end of the optical path of the body, and the intelligent terminal is embedded at the initial end of the optical path of the body;
the test assembly comprises a lens group (2) which is positioned in the shell and is used for changing an optical path from far to near and a slit sheet (3) which is provided with a light-passing hole and is used for realizing measurement, the slit sheet comprises a substrate which is arranged in the shell and has an incident light selection function, two parallel slit seams or two opposite small holes are vertically arranged on the substrate at the position corresponding to eyes of a tested person, and the distance between the two slit seams or small holes is 2.5+/-2 mm; the lens group (2) comprises at least one pair of convex lenses and concave lenses which are coaxially arranged, wherein the convex lenses are arranged close to the slit sheet, and the concave lenses are positioned in the shell between the convex lenses and the intelligent terminal; the testing component changes the position in the shell through a linear transmission component arranged on the shell; the linear transmission assembly comprises a transverse moving mechanism for adjusting the whole testing assembly to move left and right in the shell so as to realize binocular imaging and a longitudinal adjusting mechanism for adjusting the concave lens in the testing assembly to move back and forth in the shell, wherein the controlled ends of the transverse moving mechanism and the longitudinal moving mechanism are respectively connected with the output end of the control mechanism;
the intelligent terminal displays a test pattern and a shielding pattern on a screen at the same time aiming at the tested eye and the relaxed eye respectively in a measurement state, wherein the test pattern is a single background and two parallel vertical bars with different colors, and the shielding pattern is a black background.
2. An eye accommodation force detection apparatus according to claim 1, wherein: the control mechanism comprises an operation knob, an electronic sensor, a signal processing unit and a communication unit, wherein the signal processing unit is respectively connected with the operation knob and the electronic sensor, and the signal processing unit is mutually communicated with the intelligent terminal through the communication unit.
3. An eye accommodation force detection method using the eye accommodation force detection device according to any one of claims 1 to 2, characterized by comprising the steps of:
1) Placing the intelligent terminal at the initial end of the optical path of the body;
2) The eyes are tightly attached to the tail end of the light path of the body;
3) Realizing binocular image combination;
4) Measuring the distance point value of the eye and calculating the static refractive power;
5) Measuring the accommodation near point value of the eye and calculating the dynamic refractive power;
6) The accommodation range and the accommodation amplitude of the eye are calculated according to steps 4) and 5).
4. The method for detecting eye accommodation force according to claim 3, wherein the specific method for implementing binocular imaging in step 3) is as follows: after the testee wears the body, the positions of eyes and the positions of the test components in the left-right direction in the shell are adjusted to realize binocular imaging, and when the eyes are imaged, the relaxation pattern and the measurement pattern on the screen of the intelligent terminal are combined into one.
5. The method for detecting eye accommodation force as claimed in claim 4, wherein the specific method for adjusting the far point value measurement in the step 4) is as follows: under the eye relaxation state, changing the pattern displayed on the intelligent terminal through the control mechanism, so that one side of the intelligent terminal corresponding to one eye displays a relaxation pattern, and the other side of the intelligent terminal corresponding to the measured eye displays a measurement pattern; firstly, adjusting a control mechanism to realize binocular image combination, wherein the adjusting control mechanism gradually reduces the distance between red and green strips in a measurement pattern, when a tested eye watches that the red and green strips in the measurement pattern on the intelligent terminal are overlapped and changed into yellow strips, the adjustment is stopped, the control mechanism is triggered, a signal is sent to the intelligent terminal by the control mechanism, and the intelligent terminal calculates an adjusting far point value d of the measured eye according to the distance between the red and green strips Far distance According to d Far distance Calculating the refractive power P of the distance point Far distance 。
6. The method for detecting eye accommodation force according to claim 5, wherein the specific measurement method for adjusting the near point value in step 5) is as follows: the front and back positions of the concave lens in the testing component in the shell are adjusted through the operation control mechanism, and the visual distance from the simulated eyes to the intelligent terminal for displaying images is changed; the pattern seen by the eyes of the tester will be clear from blurring until the optotype seen by the eyes of the tester is blurred again; at this time, the interval between the red and green stripes is changed until the eyes of the tested person watch the superposition of the red and green stripes into yellow in the measurement patternWhen the color bar is in color, stopping operation, confirming and triggering a control mechanism, wherein the control mechanism sends a signal to an intelligent terminal, and the intelligent terminal calculates an adjustment near point value d of the measured eye according to the moving distance of the concave lens and the distance between the red and green optotypes under the moving distance Near-to-near According to d Near-to-near Calculating the power P for adjusting the near point Near-to-near 。
7. The method of claim 6, wherein the adjustment force in step 6) includes an adjustment range and an adjustment amplitude, the adjustment range being calculated to adjust the far point value d Far distance And adjusting the near point value d Near-to-near Obtained by calculating the adjustment amplitude for adjusting the near-point refractive power P Near-to-near And adjusting distance point power P Far distance Obtained by the difference of (c).
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| CN109966129A (en) * | 2019-05-08 | 2019-07-05 | 徐春明 | Visual accommodation exerciser and multi-functional glasses |
| CN110089995A (en) * | 2019-05-27 | 2019-08-06 | 宁夏蓝医人医药科技发展有限公司 | A kind of retinoscopy optometry equipment and system |
| CN110308560B (en) * | 2019-07-03 | 2022-09-30 | 南京玛克威信息科技有限公司 | Control method of VR equipment |
| CN112245808B (en) * | 2020-10-19 | 2022-06-07 | 广州御宝堂健康科技有限公司 | Teenager eye protection instrument, optical channel adjusting structure and eyesight adjusting method |
| CN112155513A (en) * | 2020-10-23 | 2021-01-01 | 杭州几目科技有限公司 | Optical system and method for detecting eyesight by using double-line sighting mark |
| CN115998241B (en) * | 2023-03-29 | 2023-06-27 | 之江实验室 | Visual detection method, visual detection device, electronic equipment and visual detection system |
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