CN115736813A - Aberration meter for measuring human eye adjusting state - Google Patents

Abstract

The invention discloses an aberrometer for measuring the human eye adjusting state, which comprises a light source, a refraction adjusting module and an aberration measuring module, wherein light emitted by the light source enters the aberration measuring module after being reflected by a measured eye; the refractive adjusting module comprises a refractive correcting device and an adjusting stimulation device which are positioned on the same optical path, and the refractive correcting device is arranged between the tested eye and the adjusting stimulation device and is used for correcting the diopter of the tested eye; the adjusting stimulation device is used for providing adjusting stimulation with different diopters for the tested eye; the aberration measuring module is used for measuring the aberration of the tested eye after being stimulated by the adjusting and stimulating device. The invention realizes the combination of the refraction correction function and the induction regulation function by arranging the refraction correction device and the regulation stimulation device in the refraction regulation module on the same optical path, and simultaneously carries out the refraction correction and the induction regulation on human eyes, thereby improving the test speed and reducing the cost and the complexity of the optical path module.

Description

Aberration meter for measuring human eye adjusting state

Technical Field

The invention relates to the technical field of optical measurement, in particular to an aberrometer for measuring the human eye adjusting state.

Background

The human eye is a complex optical module, in which besides low-price aberrations such as defocus and astigmatism, high-order aberrations such as spherical aberration and coma exist, and the visual quality of the human eye is seriously affected due to the existence of these aberrations. At present, defocusing and astigmatism are mainly monitored and corrected domestically, and in order to obtain higher visual quality, the influence caused by high-order aberration must be overcome. Therefore, the study of higher order aberrations of the human eye has become a trend in ophthalmic detection. On the basis, the measurement of the high-order aberration in the human eye adjusting state is more important. At present, mainstream theories of myopia prevention and control of teenagers, such as peripheral retina defocus theory, retina front and back aberration control theory and the like, are all based on the aberration measurement of human eyes. Measuring the aberration of the human eye can establish a database for myopia prevention and control design, so as to obtain better design effect.

At different object distances, the human eye is accommodated by changing the radius of curvature of the anterior and posterior surfaces of the lens, which focuses light onto the retina. In the process of adjusting human eyes, the aberration can be changed definitely due to the change of front and back curvatures, and the study on the aberration change in the adjusting state has important significance for better correcting vision.

The principle of the aberration measuring equipment at home and abroad is based on Hartmann-Shack principle, ray tracing principle, retina shadow checking principle and the like, wherein the Hartmann-Shack principle has the advantages of rapidness, real time and the like, and is widely applied and becomes an important means for measuring the aberration.

At present, the equipment for measuring aberration at home and abroad, such as a Hartmann dynamic aberration measuring instrument which can induce human eyes to adjust autonomously and has the patent number of CN201010253157.7, in the technology, a refraction compensation module and an induction adjustment module are separated, so that the whole structure of the instrument is redundant; moreover, the optical path of the aberration in an adjusting state is separated from the optical path at infinity when the measurement is seen, so that the measurement cost is increased; compensating for refraction requires the second movement mechanism to move as a whole, increasing the cost of stability.

Disclosure of Invention

Therefore, the invention provides an aberrometer for measuring the human eye in an adjusting state, which integrates a vision correcting module and an adjusting module together so as to solve the problems of redundant integral structure and low measuring efficiency.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

an aberrometer for measuring the human eye adjusting state comprises a light source, a refraction adjusting module and an aberration measuring module, wherein light emitted by the light source enters the aberration measuring module after being reflected by a measured eye; the refractive adjusting module comprises a refractive correcting device and an adjusting stimulation device which are positioned on the same optical path, and the refractive correcting device is arranged between the tested eye and the adjusting stimulation device and is used for correcting the diopter of the tested eye; the adjusting stimulation device is used for providing adjusting stimulation with different diopters for the tested eye; the aberration measuring module is used for measuring the aberration of the measured eye after being stimulated by the adjusting and stimulating device.

Further, the refractive correction device comprises a fixed lens and a movable lens, and the change of the focal length is realized by changing the position of the movable lens.

Further, the gap equation between the fixed lens and the moving lens is as follows:

P(x)＝-4.8366x+39.654；

wherein P (x) is diopter; x is the gap between the fixed lens and the moving lens.

Further, the adjusting stimulation device comprises an image display device and a mobile device, wherein the image display device is used for providing a detection image; the mobile device is connected with the image display device and is used for adjusting the distance between the image display device and the measured eye.

Further, the image display device comprises a first display device and a second display device, and the mobile device provides the measured eye with the adjusting stimulation within the first diopter range by adjusting the distance between the first display device and the refraction correction module; the mobile device provides the measured eye with accommodation stimulation within a second diopter range by adjusting the distance between the second display device and the refractive correction module.

Furthermore, the number of the image display devices is 1, and a zooming device is further arranged between the image display devices and the refractive correction device and used for changing the distance between the image display devices and the tested eye and providing different diopter adjusting stimulation for the tested eye.

Furthermore, an astigmatism compensation module is arranged in front of the measured eye.

Furthermore, the aberrometer further comprises a human eye positioning module, which is used for carrying out three-dimensional positioning on the measured eye; one part of the light reflected by the tested eye enters the aberration measuring module, and the other part of the light enters the human eye positioning module.

Furthermore, a galvanometer and an afocal device are arranged between the measured eye and the aberration measuring module; the light reflected by the tested eye firstly enters the afocal device, then enters the galvanometer and then enters the aberration measuring module; the galvanometer is used for changing the angle of the light reflected by the tested eye entering the aberration measurement module.

Furthermore, light emitted by the light source enters the afocal device after being reflected by the vibrating mirror, and then enters the eye to be measured.

The invention has the following advantages:

1) The invention realizes the integration of the refractive correction function and the induction regulation function by arranging the refractive correction device and the regulation stimulation device in the refractive regulation module on the eye axis. Meanwhile, the human eyes are subjected to refractive correction and induced adjustment, so that the testing speed can be increased, and the cost and the complexity of the light path module can be reduced.

2) The invention can compare the given adjusting stimulus with the actually measured aberration value, can measure the adjusting lead and adjusting lag states of the measured person, and the adjusting lead and adjusting lag states can reflect the ability of the measured person to see far and near. The measurement of the adjustment advance and the adjustment lag of the tested person has important guiding significance for myopia prevention and control.

3) The refractive correction device of the invention only needs to change the position of the movable lens to realize the refractive compensation of human eyes, does not need to integrally move the refractive adjustment module, and ensures the stability of the aberrometer.

4) The invention can also ensure that the adjusting stimulation device is not required to be arranged at a distance of 5m by arranging the zoom device, realizes the requirement of miniaturization and portability of the aberrometer and is easy to operate.

5) The invention performs astigmatism correction on the measured eye through the astigmatism compensation module, so that the aberration measurement data is more accurate.

6) The invention obtains the peripheral defocus of the retina within the full range of +/-30 degrees of the horizontal and vertical angles of the human eye through the two-dimensional galvanometer, and the angle range is wider. The measurement of the retinal defocus and the high-order aberration of the human eye in the related ophthalmic surgery (such as the keratotomy, the lens implantation and the like) greatly helps the accurate planning of the surgery, can improve the surgical effect, and can establish a personalized human eye model according to the measured data to provide a more effective vision correction means.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is a block diagram of an aberrometer for measuring an eye-adjusted state according to embodiment 1 of the present invention, in which a dotted line is a light path of light source light and a solid line is a light path of eye-reflected light;

fig. 2 is a block diagram of an aberrometer for measuring an eye-adjusted state according to embodiment 2 of the present invention;

fig. 3 is a block diagram of an aberrometer for measuring an eye-adjusted state according to embodiment 3 of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

As shown in fig. 1, an aberrometer for measuring human eye accommodation state comprises a light source 5, a refraction adjusting module 3 and an aberration measuring module 2, wherein light source light 6 emitted from the light source enters the aberration measuring module 2 after being reflected by an eye to be measured (i.e. a human eye 9); the refraction adjusting module 3 comprises a refraction correcting device and an adjusting stimulation device which are positioned on the same optical path, and the refraction correcting device is positioned between the human eyes 9 and the adjusting stimulation device and is used for correcting the diopter of the human eyes 9; the adjusting stimulation device is used for providing adjusting stimulation with different diopters for the human eyes 9; the aberration measuring module 2 is used for measuring the aberration of the human eye 9 stimulated by the adjusting stimulation device.

The aberrometer in the embodiment further comprises a human eye positioning module 1 and a dichroic mirror 4, the light source light 6 and the screen light 7 of the refraction adjusting module 3 are incident into human eyes 9 after passing through a light path shared by the dichroic mirror 4, the light source light 6 and the refraction adjusting module 3 are not limited to be started at the same time in the aberrometer, and the refraction adjusting module 3 alone can perform an induction adjusting function. The refraction adjusting module 3 can correct myopia from-8D to 0D, can provide adjusting stimulation from 0D to 4D for the tested human eye 9 (one step is provided for every 0.5D), can measure the aberration of the human eye 9 under the corresponding adjusting stimulation after providing the specific adjusting stimulation, can simulate the actual adjusting condition of the human eye 9, can establish a human eye 9 model database aiming at the adjusting condition subsequently, and has important significance for researching and individually designing related parameters for preventing and controlling myopia. A light supplementing light source 8 can be arranged between the dichroic mirror 4 and the human eyes 9 and used for supplementing light to the human eyes 9.

Above-mentioned light source light 6 arrives behind the eye ground of surveyed eye, through being surveyed the eye reflection light 10 of reflection generation, eye reflection light 10 partly gets into aberration measurement module, and another part gets into people's eye orientation module, promptly eye reflection light 10 obtains first beam splitter 12 and second beam splitter 13 after 11 beam split of first spectroscope, first beam splitter 12 jets into people's eye orientation module 1, aberration measurement module 2 is jetted into to second beam splitter 13, realizes people's eye orientation module 1, aberration measurement module 2 sharing part light path, fixes a position and the aberration measurement based on the same eye reflection light between the two, can realize mutually supporting of the two, improves measuring speed, makes measuring result more accurate, and reasonable light path design has reduced the complexity of light path module moreover.

The eye positioning module 1 images according to the eye reflection light 10 and is configured to position the eye 9 three-dimensionally, specifically, a camera 14 is provided, in this embodiment, a depth camera or a binocular camera is used to directly position the eye three-dimensionally, or a distance-limited camera is used, and the function and the working principle of the camera 14 are specifically described below by taking the distance-limited camera as an example. In the three-dimensional coordinate system, the origin is the pupil center, the connecting line direction of the nasal side and the temporal side of the human eye 9 is the Y axis, the vertical direction perpendicular to the Y axis is the X axis, and the direction of the human eye 9 moving back and forth relative to the aberrometer is the Z axis. Image processing is performed according to the image acquired by the camera 14, the pupil center in the image is positioned, the offset of the X-axis and the Y-axis is determined according to the offset degree of the pupil center and the target position in the image, and the offset of the Z-axis is determined according to the definition of the image. The operator can adjust the position of the human eye 9 according to the offset, so that the pupil center of the human eye 9 is positioned at an ideal position, and the accurate data observation and collection are facilitated. In addition, the camera 14 of the eye positioning module 1 can output an eye image in real time, so that observation and positioning adjustment are facilitated, and the pupil size in each adjustment state can be acquired in real time through the eye image, so as to provide reference for accurately determining the state of the eye 9. The finite distance camera 14 is provided with an optical filter with a center wavelength of 940nm, and prevents the SLD (super luminescent diode) light source 5 from influencing the positioning of the X axis, the Y axis and the Z axis.

In this embodiment, the first beam splitter 11 is disposed in the human eye positioning module 1, so that the human eye positioning module 1 has a beam splitting function, the overall complexity of the module is reduced, and the volume of the device is reduced. Alternatively, the first beam splitter 11 may be separately disposed outside the eye positioning module 1 or disposed in the aberration measuring module 2. The splitting ratio of the first beam splitter 11 is determined according to the tolerance energy of the human eye 9, the light intensity required by the camera 14 and the light intensity required by the wavefront sensor 25, and it is preferable in the present invention that the splitting ratio of the first beam splitter 11 is 80:20, respectively.

The human eye positioning module 1 is internally provided with a second beam splitter 15, and the second beam splitter 15 is used for enabling the light source light 6 and the first beam splitter 12 to share a part of light path. The light source light 6 emitted by the light source 5 is reflected by the second beam splitter 15 and enters the dichroic mirror 4, and the light source light 6 is combined with the light path of the human eye positioning module 1, so that the complexity of the light path of the whole module can be reduced. Alternatively, the technical solution that the second beam splitter 15 can be disposed in the aberration measuring module 2 or separately falls within the protection scope of the present invention. The splitting ratio of the second beam splitter 15 is determined according to the tolerance energy of the human eye 9, the light intensity required by the camera 14 and the light intensity required by the wavefront sensor 25, and it is preferable in the present invention that the splitting ratio of the second beam splitter 15 is 80:20, respectively.

The aberration measuring module 2 receives the eye reflected light 10, and the wavefront sensor 25 detects the wavefront aberration of the human eye 9 to obtain the diopter of the human eye 9. The aberration measurement module 2 includes a wavefront sensor 25, a first lens 21, a second lens 22 and a diaphragm 24, the second beam splitter 13 passes through the first lens 21, the diaphragm 24 and the second lens 22, and finally enters the wavefront sensor 25, wherein the first lens 21 and the second lens 22 form a conjugate optical system, the beam expansion ratio of the conjugate optical system is f1:1.5, a conjugate point is the pupil center of the human eye 9 and the optical center of the wavefront sensor 25, the diaphragm 24 is used for blocking stray light, and a plurality of reflectors 23 can be used in the aberration measurement module 2 to change the light path direction, thereby reducing the volume of the device. In this embodiment, the wavefront sensor 25 is a hartmann wavefront sensor composed of a microlens array and a CCD camera, a light beam with wavefront information is imaged on a focal plane through each sub-lens of the microlens array, the CCD camera can acquire a dot pattern carrying the wavefront information, and the dot pattern on the CCD camera can calculate the wavefront aberration of the human eye 9. A narrow-band filter with the central wavelength of 840nm is arranged in front of the wavefront sensor 25, so that stray light is further prevented from influencing a calculation result.

The adjusting stimulation device comprises an image display device 16 and a first moving device 17, wherein the image display device 16 is used for providing a detection image, the detection image is an E-shaped image in the embodiment, the size of an E-shaped character mark is set according to the magnification of a module and a GB 11533-2011 standard logarithmic visual acuity chart, and the first moving device 17 is connected with the image display device 16 and is used for adjusting the distance between the image display device 16 and the detected eye. When the image display device 16 is located at the position of 0D, because the refraction correction device only corrects diopter uncorrected astigmatism, or the set refraction correction power does not perform foot correction on the measured eye, initial debugging is needed, red and green visual marks are provided firstly, fine adjustment is performed according to subjective judgment of human eyes 9 until the measured object subjectively considers that the marks in the red and green visual marks are as clear, then testing can be performed, and corresponding detection images are adjusted for being recognized by the measured person. In the embodiment, in order to miniaturize the whole device and facilitate adjustment and control, a large-sized screen is not used for moving, but is designed in a segmented manner according to adjustment stimulation, the image display device 16 in the embodiment comprises a first display device and a second display device, and the first moving device 17 provides the adjustment stimulation in a first diopter range for the tested eye by adjusting the distance between the first display device and the diopter correction module; the first moving means 17 provides the measured eye with the accommodation stimulus within the second diopter range by adjusting the distance between the second display means and the refractive correction module. When the latter image display device located on the optical path is used, the former image display device can be removed from the optical path, avoiding the generation of a barrier. The image display device 16 can select a display screen commonly used in the art according to the usage scenario, in this embodiment, the first image display device is a tablet computer, which provides the positions of 0D and 0.5D adjustment stimuli, the second image display device is an ips screen, which provides 1D to 4D adjustment stimuli, in this embodiment, 0.5D is selected as one step, that is, the adjustment stimuli of 0D, 0.5D, 1D, 1.5D … D are provided, respectively, and when the image display device 16 is located at 0D, the distance from the detected image to the human eye 9 is at least 5m. In actual use, different step values can be selected according to needs, and different first diopter and second diopter ranges can be set.

The image display area in the present invention is located in the optical path of the screen light 7 of the dioptric adjustment module 3. Because the image display devices 16 of the present embodiment are multiple, the control module respectively controls the first moving devices 17 of the multiple image display devices 16, so that only 1 display screen of the image display device appears in the image display area, when the first display device located at the rear of the optical path is used, the second display device turns over and stays at one side of the image display area after moving, when the second display device is used, the second display device returns to the working position, the first display device is located at the rear, cannot be shielded, and can not move, and can also move to one side of the image display area through the first moving device 17, or the first display device closes the screen, thereby realizing display switching of two display screens on the same axis. The first moving device 17 is any one of a guide rail transmission device, a gear linear transmission device and a lead screw linear transmission device controlled by a motor, and the motor is a stepping motor or a direct current motor.

The refractive correction device comprises a fixed lens 18 and a moving lens 19, and the change of the focal length is realized by changing the position of the moving lens 19. The fixed lens 18 is a stationary lens and the moving lens 19 is used to change the relative distance between the moving lens 19 and the fixed lens 18 by linear movement, adjust the focal length of the combination of the moving lens 19 and the fixed lens 18 to correct-8-0D myopia, and change the gap between the refractive correction device and the image display device 16 for providing 0-4D accommodative stimulus (one step per 0.5D) to the human eye 9 under test. In which the focusing principle is to change the focal length by changing the position of the moving lens 19, as shown in fig. 1, the fixed lens 18 and the moving lens 19 in this embodiment are placed in the manner shown in the figure, that is, the fixed lens is closer to the human eye 9 than the moving lens on the optical path, and the diopter provided by the combination of the fixed lens 18 and the moving lens 19 and the gap equation between the fixed lens 18 and the moving lens 19 are as follows:

P(x)＝-4.8366x+39.654；

wherein P (x) is diopter;

x is the gap between the fixed lens 18 and the moving lens 19, and the equation varies according to the selected parameter changes of the fixed lens 18 and the moving lens 19; furthermore, the fixed lens 18 and the moving lens 19 may not be placed as in fig. 1, i.e. the moving lens may be closer to the human eye 9 in the optical path than the fixed lens.

The movable lens 19 is provided with a second moving device 20, if the number of the movable lenses 19 is greater than 1, the relative distance between the plurality of movable lenses 19 is not changed, in this embodiment, the number of the movable lenses 19 is 2, and both the movable lenses 19 are fixed on the second moving device 20. The driving instruction of the second moving device 20 is calculated by the correction software according to different correction degrees, and the second moving device 20 is controlled to drive the moving lens 19 to move linearly. The second moving device 20 is any one of a guide rail transmission device, a gear linear transmission device and a screw rod linear transmission device controlled by a motor, and the motor is a stepping motor or a direct current motor.

Example 2

As shown in fig. 2, the number of the image display devices 16 in this embodiment is 1, and the image display devices 16 do not need to move, and a zoom device 26 is further disposed between the image display devices 16 and the refractive correction device for changing the distance between the image display devices 16 and the human eyes 9 to provide different diopter adjustment stimuli to the human eyes 9.

The zoom device 26 can achieve the same adjustment stimulus as that of embodiment 1 and reduce the distance between the image display device 16 and the human eye 9, specifically, in embodiment 1, when the adjustment stimulus of 0D is provided, the distance between the image display device 16 and the human eye 9 is at least 5m. In the present embodiment, when the 0D adjustment stimulus is provided, the distance between the image display device 16 and the human eye 9 may be 20cm, which may be changed according to the material selection parameters of the zoom device, that is, the farthest distance between the image display device 16 and the human eye 9 in the present embodiment is in the range of 0.2m to 5m, so as to further reduce the volume of the apparatus, and omit a display screen and the first moving device 17.

The zoom apparatus 26 is similar to the internal structure of the refractive correction apparatus and includes a fixed lens and a movable lens, when different adjustment stimuli need to be provided, the display screen does not need to be moved, and only the position of the movable lens in the zoom apparatus 26 needs to be changed, so that the focal length can be changed, and different adjustment stimuli can be provided.

Example 3

In order to realize the measurement of the aberration of the fundus of the human eye 9 with a larger field angle, as shown in fig. 3, a galvanometer 27 and an afocal device 28 are provided between the human eye 9 and the aberration measuring module 2; the light reflected by the tested eye firstly enters the afocal device 28, then enters the galvanometer 27 and then enters the aberration measuring module; the galvanometer 27 is used for changing the angle of the light reflected by the tested eye entering the aberration measuring module. The light emitted from the light source is reflected by the galvanometer 27, enters the afocal device 28, and then enters the human eye 9.

The galvanometer 27 in this embodiment is a two-dimensional galvanometer, the afocal device 28 is a conjugate optical system composed of a plurality of lenses, the pupil center of the human eye 9 and the reflection center of the galvanometer 27 are conjugate, and the two-dimensional galvanometer 30 is used for scanning, so that the aberration of the whole-eye field angle of ± 30 degrees or even wider of the human eye 9 in an adjusting state can be tested, the measured data is richer, and the application range is wider.

Example 4

The technical characteristics are added to any one of the embodiments 1-3, as shown in fig. 2 and 3, an astigmatism compensation module 29 is further arranged in front of the human eye 9, and is used for correcting refraction and simultaneously correcting astigmatism of the human eye 9, so that the application range is increased.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. An aberrometer for measuring the human eye adjusting state comprises a light source, a refraction adjusting module and an aberration measuring module, and is characterized in that light emitted by the light source enters the aberration measuring module after being reflected by a measured eye; the refractive adjusting module comprises a refractive correcting device and an adjusting stimulation device which are positioned on the same optical path, and the refractive correcting device is arranged between the tested eye and the adjusting stimulation device and is used for correcting the diopter of the tested eye; the adjusting stimulation device is used for providing adjusting stimulation with different diopters for the tested eye; the aberration measuring module is used for measuring the aberration of the tested eye after being stimulated by the adjusting and stimulating device.

2. The aberrometer for measuring the accommodative state of the human eye of claim 1, wherein the refractive correction device comprises a fixed lens and a moving lens, and wherein the change in focal length is accomplished by a change in the position of the moving lens.

3. The aberrometer for measuring the accommodative state of the human eye as claimed in claim 2, wherein the gap between the fixed lens and the moving lens is given by the equation:

P(x)＝-4.8366x+39.654；

wherein P (x) is diopter; x is the gap between the fixed lens and the moving lens.

4. The aberrometer for measuring the accommodative state of the human eye as claimed in claim 1, wherein said accommodation stimulating means comprises an image display means for providing a detection image and a moving means; the mobile device is connected with the image display device and is used for adjusting the distance between the image display device and the tested eye.

5. The aberrometer of claim 4, wherein the image display device comprises a first display device and a second display device, and the moving device provides the measured eye with the accommodation stimulus within a first diopter range by adjusting a distance between the first display device and the refractive correction module; the mobile device provides the measured eye with accommodation stimulation within a second diopter range by adjusting the distance between the second display device and the refractive correction module.

6. The aberrometer for measuring the accommodative state of the human eye as claimed in claim 4, wherein the number of the image display devices is 1, and a zoom device is further provided between the image display devices and the refractive correction device for varying the distance between the image display devices and the eye to be measured to provide the eye to be measured with accommodative stimulus of different diopters.

7. The aberrometer for measuring accommodative situations of the human eye as claimed in one of claims 1 to 6, wherein an astigmatism compensation module is further provided in front of the eye to be measured.

8. The aberrometer for measuring the accommodative state of the human eye as claimed in claim 1, wherein said aberrometer further comprises a human eye positioning module for three-dimensional positioning of the eye to be measured; one part of the light reflected by the tested eye enters the aberration measuring module, and the other part of the light enters the human eye positioning module.

9. The aberrometer for measuring the accommodative state of the human eye as claimed in claim 1, wherein a galvanometer and an afocal device are further disposed between the eye to be measured and the aberration measuring module; the light reflected by the tested eye firstly enters the afocal device, then enters the galvanometer and then enters the aberration measuring module; the galvanometer is used for changing the angle of the light reflected by the tested eye entering the aberration measurement module.

10. The aberrometer of claim 9, wherein the light from the light source is reflected by the galvanometer and enters the afocal device before entering the eye to be measured.

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