CN114246546A - Whole eyeball biological measurement system and measurement method thereof - Google Patents

Abstract

The application discloses eyeball totality biological measurement system and measurement method thereof, the eyeball totality biological measurement system includes: a light source, an eye axis measuring device and an aberration measuring device; the light source is used for emitting measuring light, the measuring light is incident to the eye to be measured after passing through the eye axis measuring device, and the light reflected by the eye to be measured respectively enters the eye axis measuring device and the aberration measuring device; the eye axis measuring device is used for measuring the eye axis length of the tested eye, and the aberration measuring device is used for measuring the aberration of the tested eye. The scheme combines the functions of eye axis measurement and aberration measurement, can directly obtain the biological measurement parameters of the whole eyeball, and has more accurate measurement result and high precision.

Description

Whole eyeball biological measurement system and measurement method thereof

Technical Field

The invention relates to the technical field of eyeball data measurement, in particular to a whole eyeball biometric system and a measuring method thereof.

Background

The myopia rate of children and teenagers in China is high, the myopia is gradually aged and serious, ciliary muscles in eyes are fatigued due to increase of eyes, and the axis of the eyes is promoted to grow too fast and be lengthened, so that the ametropia is caused.

Although the central light ray is focused on the retina after entering human eyes, the peripheral focus is positioned behind the retina, so that the myopia of the peripheral area is over-corrected. The development of myopia has been associated with peripheral relative hyperopia, and peripheral retinal images appear behind the retina to stimulate a gradual increase in axial length of the eye, resulting in a gradual progression of the myopic power.

At present, the principle of the equipment capable of detecting the retinal defocus amount at home and abroad is that images are collected at the retinal central point at 0 degree, and peripheral defocus amount is calculated by collecting fundus images at different depths and then utilizing an algorithm. These devices are therefore unable to obtain peripheral defocus through direct measurement and contain only power and astigmatism information, and no higher order aberrations, so the measured aberration information is not comprehensive.

Disclosure of Invention

In view of the above, the present application provides a whole eyeball biometric system and a measuring method thereof, which can measure parameters of the axial length and the aberration of the eye simultaneously.

In order to achieve the above purpose, the invention provides the following technical scheme:

a whole eye biometric system comprising:

a light source, an eye axis measuring device and an aberration measuring device; the light source is used for emitting measuring light, the measuring light enters the eye to be measured after passing through the eye axis measuring device, and the light reflected by the eye to be measured respectively enters the eye axis measuring device and the aberration measuring device; the eye axis measuring device is used for measuring the eye axis length of the tested eye, and the aberration measuring device is used for measuring the aberration of the tested eye.

Preferably, in the above-described whole eye biometric system, the eye axis measuring device includes: the device comprises a first light splitting device, a second light splitting device, a fixed reflecting device, a movable reflecting device and a detecting device; a part of light after passing through the first light splitting device is incident to the fixed reflecting device, the other part of light is incident to the movable reflecting device, the light beams emitted by the fixed reflecting device and the movable reflecting device are combined and then are incident to the eye to be detected through the second light splitting device, and the light reflected by the eye to be detected is received through the second light splitting device; the distance between the movable reflection device and the first light splitting device is adjustable.

Preferably, in the above-described whole-eye biometric system, the light emitted from the fixed reflection device is parallel to or coincides with the incident light, and the light emitted from the movable reflection device is parallel to or coincides with the incident light.

Preferably, in the above-described whole eye biometric system, the aberration measuring apparatus includes: a filtering device and a wavefront sensor; the light reflected by the tested eye firstly enters the filtering device for filtering and then enters the wavefront sensor, and the aberration of the tested eye is obtained through the signal received by the wavefront sensor.

Preferably, in the above-mentioned whole eye biometric system, the whole eye biometric system further includes: a third light splitting device; and part of light reflected by the tested eye enters the aberration measuring device after passing through the third light splitting device, and the other part of light returns to the eye axis measuring device.

Preferably, in the above-mentioned whole-eye biometric system, the whole-eye biometric system is mounted on a rotating device, and the rotating device is configured to drive the measuring light incident to the measured eye to rotate around the pupil center of the measured eye.

Preferably, in the above-mentioned whole eye biometric system, the whole eye biometric system further includes: a fixation device for providing a fixation target to the eye to be tested to guide the eye to be tested to gaze.

The present invention also provides a measuring method of the whole eyeball biometric system as described in any one of the above, the measuring method comprising:

the measuring light emitted by the light source enters the eye to be measured after passing through the eye axis measuring device, one part of the light reflected by the eye to be measured enters the aberration measuring device to measure the wavefront aberration, and the other part of the light returns to the eye axis measuring device to measure the eye axis length.

Preferably, in the above measurement method, the measurement method further includes: and changing the angle of the measuring light incident to the measured eye to obtain the axial length and the aberration under different angles.

Preferably, in the above-described measurement method, the measurement of the length of the eye axis is performed, and the eye axis measurement device includes: the device comprises a light splitting device, a fixed reflecting device, a movable reflecting device and a detecting device, wherein a part of light passing through the light splitting device is incident to the fixed reflecting device, and the other part of light is incident to the movable reflecting device; the measurement of the length of the eye axis by the eye axis measuring device specifically comprises:

when the optical paths of the light reflected by the tested eye to the fixed reflecting device and the movable reflecting device are equal, the detecting device obtains a first interference signal and obtains a first position of the movable reflecting device;

moving the movable reflecting device on the optical path, and acquiring a second position of the movable reflecting device when the detecting device acquires a second interference signal;

acquiring the distance between the first position and the second position as the length of the eye axis.

As can be seen from the above description, in the whole eyeball biometric system and the measurement method thereof provided by the technical scheme of the present invention, the eye axis measurement device and the aberration measurement device are used to simultaneously measure the measured eye, so that the length of the eye axis, the refraction, and other low-order and high-order aberrations such as coma aberration, astigmatism, field curvature, distortion, chromatic aberration, etc. can be simultaneously measured, the measurement speed is increased, a large amount of time cost is saved for vision screening, and meanwhile, the aberration measurement device and the eye axis measurement device share hardware, so that the cost can be saved. In addition, the whole eyeball biological measurement system can directly measure and obtain the measurement parameters of the whole eyeball, and the measurement result is more accurate and has high precision. And then carrying out whole-eyeball biological modeling according to the measurement parameters, accurately guiding lens fitting according to the peripheral defocusing condition of the retina and the eye axis data, monitoring the parameters of human eyes by using the whole-eyeball biological measurement system after lens fitting, and tracking the lens fitting effect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

The structures, proportions, and dimensions shown in the drawings and described in the specification are for illustrative purposes only and are not intended to limit the scope of the present disclosure, which is defined by the claims, but rather by the claims, it is understood that these drawings and their equivalents are merely illustrative and not intended to limit the scope of the present disclosure.

Fig. 1 is a schematic optical path diagram of a whole eyeball biometric system according to an embodiment of the present invention;

FIG. 2 is a schematic view of a rotating device according to an embodiment of the present invention;

FIG. 3 is a schematic view of another state of the rotating device according to the embodiment of the present invention;

FIG. 4 is a schematic view of a rotating device according to an embodiment of the present invention;

fig. 5 is a schematic optical path diagram of another whole eyeball biometric system according to an embodiment of the present invention.

Detailed Description

Embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the application are shown, and in which it is to be understood that the embodiments described are merely illustrative of some, but not all, of the embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.

The invention can simultaneously measure the peripheral defocus amount, the peripheral eye axial length (the eye axial length of the peripheral area of the retina which is positioned outside the central fovea of the macula lutea) and the peripheral high-order aberration besides measuring the eye axial length on the visual axis, the refraction of the human eye and the high-order aberration (such as coma, astigmatism, field curvature, distortion, chromatic aberration and the like). Of course, only one or more of the above parameters may be measured according to actual needs.

Referring to fig. 1, fig. 1 is a schematic optical path diagram of a global eye biometric system according to an embodiment of the present invention. As shown in fig. 1, the whole eye biometric system includes:

a light source 4, an eye axis measuring device 2 and an aberration measuring device 3; the light source 4 is used for emitting measurement light, the measurement light enters the eye 23 to be measured after passing through the eye axis measuring device 2, and the light reflected by the eye 23 to be measured respectively enters the eye axis measuring device 2 and the aberration measuring device 3; the eye axis measuring device 2 is used for measuring the eye axis length of the tested eye 23, and the aberration measuring device 3 is used for measuring the aberration of the tested eye 23.

The eye 23 to be measured according to the present invention may be a human eye, or may be other types of eyeballs such as an animal eye and a simulated eye, and the following description will be given by taking a human eye as an example.

In an embodiment of the present invention, the eye axis measuring apparatus 2 includes: a first light splitting device 9, a second light splitting device 12, a fixed reflecting device 10, a movable reflecting device 11 and a detecting device 15; the measuring light passes through the first light splitting device 9, a part of light enters the fixed reflecting device 10, the other part of light enters the movable reflecting device 11, the light emitted by the fixed reflecting device 10 and the movable reflecting device 11 is combined and then enters the eye 23 to be measured through the second light splitting device 12, the light reflected by the eye 23 to be measured is received by the detecting device 15 after passing through the second light splitting device 12, wherein the movable reflecting device 11 can move on the light path to change the distance between the movable reflecting device 11 and the first light splitting device 9, so that the light path reflected by the eye 23 to be measured is changed.

The emergent light of the fixed reflection device 10 is parallel or coincident with the incident light thereof, and the emergent light of the movable reflection device 11 is parallel or coincident with the incident light thereof.

It should be noted that the fixed reflection device 10 may be a fixed reference arm, and the movable reflection device 11 may be a movable reference arm, preferably a pyramid prism, or other optical components or lens combinations, which can realize parallel or coincidence of incident light and emergent light, such as a plane mirror; the emergent light of the pyramid prism is displaced relative to the incident light path, and the emergent light of the plane mirror is coincided with the incident light. And the positions of the fixed reflecting device 10 and the movable reflecting device 11 on the optical path can be switched.

In an embodiment of the present invention, the aberration measuring apparatus 3 includes: filtering means and wavefront sensor 60; the light reflected by the eye 23 is incident to the filter device for filtering, and then incident to the wavefront sensor 60, and the aberration of the eye 23 is obtained through the signal received by the wavefront sensor 60.

As shown in fig. 1, the whole eye biometric system further includes: a third light splitting device 16; a part of light reflected by the eye 23 to be measured after passing through the third light splitting device 16 enters the aberration measuring device 3, and the other part of light returns to the eye axis measuring device 2.

As shown in fig. 1, the whole eye biometric system further includes: a collimator lens 5 and a diaphragm 6; the measuring light enters the eye axis measuring device 2 after passing through the collimating lens 5 and the diaphragm 6 in sequence.

In embodiments of the present invention, the light entering the eye 23 being measured may be adjusted to be incident at different angles relative to the visual axis, thereby focusing the light at different locations on the retina. The whole-eyeball biometric system is installed on a rotating device, and the rotating device is used for driving the measuring light entering the tested eye 23 to rotate around the pupil center of the tested eye 23. In the present embodiment, the eye 23 can be measured simultaneously by using the eye axis measuring device 2 and the aberration measuring device 3, so as to achieve the simultaneous measurement of the central eye axis length (the distance from the anterior surface of the cornea to the fovea on the visual axis), the peripheral eye axis length (the eye axis length of the peripheral area of the retina outside the fovea), and other low-order and high-order aberrations such as refraction, coma, astigmatism, field curvature, distortion, chromatic aberration, etc. on the visual axis and the periphery. Of course, the rotating device is not needed to be arranged according to actual needs, for example, only when parameters such as the length of the eye axis on the visual axis or diopter are obtained.

As shown in fig. 2 and fig. 3, the rotating device includes a measuring head 24 and a rotating platform 25, the whole eyeball biometric system is installed on the measuring head 24, and the measuring head 24 is driven to rotate by rotating the rotating platform 25, so as to drive the measuring light to rotate around the pupil center of the measured eye 23.

As shown in fig. 1, the whole eye biometric system further includes: a fixation device 30, the fixation device 30 is used for providing a fixation mark to the tested eye 23 to guide the tested eye 23 to gaze.

It should be noted that, when performing the measurement, it is ensured that the light enters from the center of the pupil, and the light emitted from the measurement system rotates around the center of the pupil all the time when the measurement system rotates. The specific implementation of this embodiment is that the rotation center of the emergent light of the measurement system is known before the start, then the eye of the measured object is adjusted to make the pupil center of the measured eye coincide with the rotation center, and this step can be adjusted manually, or a camera can be placed in front of this system to obtain the image of the measured eye, the position of the pupil center is identified according to the image combination algorithm, and the pupil center of the measured eye is automatically adjusted to the known rotation center by cooperating with the three-dimensional moving device, and then this measurement system is used to perform measurement. During the measurement, the eye of the present embodiment does not need to be adjusted.

As shown in fig. 2, when the rotation angle of the turntable 25 is 0 °, the light incident angle of fig. 1 is 0 °, that is, the axial length and aberration (e.g., diopter) of the measured eye 23 at 0 ° are measured, corresponding to the light 35 in fig. 4.

When the turntable 25 is rotated 30 ° to the left as shown in fig. 3, the light ray incident angle of fig. 1 is-30 °, i.e. the axial length and aberration (e.g. peripheral defocus) of the measured eye 23 at-30 ° are measured, and the light ray 36 intersects the visual axis at the pupil center, corresponding to the light ray 36 in fig. 4. Similarly, the turret 25 may be rotated 30 ° to the right, i.e. the angle of incidence of the light rays is 30 ° in fig. 1, i.e. the axial length and aberrations of the measured eye 23 at 30 ° are measured, corresponding to the light rays 37 in fig. 4.

In other embodiments, the eye 23 may be measured by rotating the eye by any angle within a range of-30 ° to 30 °, but is not limited to the embodiments described in the present application. For example, by controlling the turntable 25 to measure the peripheral eye axial length and peripheral defocus amount at different angles at intervals of 1 ° or 5 °, the angle intervals can be set freely, so that the central eye axial length and central diopter of the eye 23 to be measured and the peripheral eye axial length and peripheral defocus amount in the range of-30 ° to-30 ° can be measured. Of course, the measurement in a larger angle range can be realized by controlling the rotating table 25 to rotate by any angle larger than +/-30 degrees.

In the embodiment of the invention, the eye axis measuring device 2 adopts a double-beam partial coherence measuring method. The axial length of the eye 23 to be measured can be measured.

As shown in fig. 1, the eye axis measuring apparatus 2 further includes: a quarter glass 13, a condenser lens 14, and a diaphragm 33;

after being collimated by the collimating lens 5, the measuring light emitted by the light source 4 passes through the iris diaphragm 6 to change the spot size of the measuring light, and the spot size of the measuring light entering the eye 23 to be measured is controlled, so that the light energy entering the eyeball is controlled, and the requirement of human eye laser safety is met, then the measuring light is divided into two parts of light with equal proportion by the first light splitting device 9, one part of light enters the fixed reflecting device 10, the other part of light enters the movable reflecting device 11, the light beams emitted by the fixed reflecting device 10 and the movable reflecting device 11 are combined and then enter the second light splitting device 12, the light reflected by the second light splitting device 12 passes through the quarter glass 13 to become circularly polarized light, the circularly polarized light passes through the third light splitting device 16 and the fixed viewing device 30 without being changed and then enters the eye 23 to be measured, and a part of light reflected by the eye 23 enters the aberration device 16 In the measuring device 3, the other part of light is changed into circularly polarized light through the quarter glass 13, the circularly polarized light is transmitted through the second light splitting device 12 to enter the converging lens 14, and is converged by the converging lens 14, then passes through the diaphragm 33, and finally is received by the detecting device 15. The detection device 15 may be a photodetector (e.g., APD or PMT).

When the fixed reflection device 10, the movable reflection device 11 and the first light splitting device 9 are in equal optical path, an interference signal can be obtained on the detection device 15; the movable reflection device 11 is adjusted to move a distance on the optical path, which can be moved forward or backward according to the actual situation, and when the distance is equal to the optical path from the cornea to the retina of the tested eye 23, the interference signal can be obtained again on the detection device 15. The axial length of the eye 23 to be measured can be calculated from the distance moved by the movable reflecting device 11. The movement of the movable reflection device 11 may be manual or automatic, and the specific structure for realizing the movement is not limited.

The first light splitting device 9 and the third light splitting device 16 may both have a splitting ratio of 50: 50 of a beam splitter prism; the second beam splitting device 12 can be a polarization beam splitting prism which is transparent to P and reverse to S, functions of transmission and reflection can be achieved by matching with the quarter glass 13, and the quarter glass 13 can reinforce light. In another embodiment, the combination of the second beam splitter 12 and the quarter glass 13 may be replaced by an optical member or a combination of lenses such as a half mirror, and a part of light may be transmitted and a part of light may be reflected.

The light source 4 may be a super-radiation light emitting diode with a central wavelength of 840nm and a half-height width of 30 nm.

In the embodiment of the invention, the aberration measuring device 3 adopts a Hartmann-Shack wavefront aberration measuring method, and can measure the aberration of the measured eye 23.

As shown in fig. 1, the aberration measuring apparatus 3 further includes: a bandwidth filter 20;

in the present embodiment, the filtering device is a 4F filtering device 50, which includes a first plano-convex lens 17, an aperture stop 18, and a second plano-convex lens 19. It should be noted that the specific elements and structures constituting the 4F filtering apparatus 50 may be replaced by other implementations known in the art.

The wavefront sensor 60 includes a microlens array 21 and a camera 22.

The light reflected by the detected eye 23 is incident to the 4F filter device 50 through the third light splitting device 16, sequentially passes through the first plano-convex lens 17, the second aperture diaphragm 18 and the second plano-convex lens 19 to filter most of the light reflected by the cornea of the detected eye 23, and then is incident to the focal plane of the microlens array 21 through the bandwidth filter 20, the light with wavefront information is imaged on the focal plane through each sub-lens of the microlens array 21, the camera 22 can acquire a dot matrix diagram carrying the wavefront information, and the aberration of the detected eye 23 can be calculated through the dot matrix diagram on the camera 22.

In the 4F filter device 50 of the present embodiment, the aperture stop 18 can filter out most of the light reflected by the cornea of the human eye. And then the light is incident on a micro lens array 21 through a bandwidth filter 20 with the central wavelength of 840nm, and the wavelength of the light is matched with the wavelength of the light source 4. The camera 22 is placed on the focal plane of the microlens array 21, and the aberrations of the eye 23 can be calculated by the dot matrix on the camera 22, including the spherical lens, cylindrical lens and axial direction of the eye 23, which respectively represent the power of myopia or hyperopia, astigmatism and the direction of astigmatism.

In the embodiment of the invention, the wavefront sensor 60 consists of the microlens array 21 and the camera 22, and the aberration of the human eye is measured by adopting the Hartmann-Shack wavefront sensor principle. In addition, the wavefront sensor 60 may be replaced by other wavefront sensor structures known in the art, such as a curvature wavefront sensor or a pyramid wavefront sensor.

As shown in fig. 1, the vision fixation device 30 includes: a fixation lamp 28 and a cold mirror 27;

wherein, the fixation lamp 28 may be an LED for providing a fixation mark to the tested eye 23 to guide the tested eye 23 to gaze, the fixation mark being coaxial with the visual axes of the eye axis measuring device 2, the aberration measuring device 3 and the tested eye 23. The fixation mark at infinity can be displayed by means of the fixation device 30 to simulate the viewing direction of the eye at infinity, so as to achieve the purpose of relaxing the ciliary muscle in the eye, and the measurement is more accurate, therefore, the structure of the fixation device 30 is not limited to the scheme. The fixation index is optically coupled to the eye axis measuring device 2 and the aberration measuring device 3 by a cold mirror 27. The cold mirror 27 may have an angle of 45 ° with the main optical axis for transmitting the measurement light and reflecting the visible light of the fixation lamp 28.

The position of the fixation device 30 in the optical path is not limited to the position shown in fig. 1, and may be coupled to other positions in the optical path according to actual conditions. In this embodiment, the eye 23 to be measured is stared at the fixation mark and the measurement laser is rotated around the pupil to perform measurement. Thus, during rotation of the measuring head 24, the fixation device 30 cannot be rotated therewith to ensure that the eye remains stationary with respect to the fixation point during the measurement.

As shown in fig. 5, fig. 5 is a schematic optical path diagram of another whole eye biometric system according to an embodiment of the present invention. In this embodiment, the vision fixation device 30 is provided between the light source 4 and the eye axis measuring device 2, and the vision fixation device 30 includes: the fixed vision lamp 7 is combined with the measuring light beam through the reflection of the beam splitting cube 8; the fixation lamp 7 may be an LED for providing a fixation target to the eye 23 to be tested to guide the eye 23 to be tested to gaze and may also be a screen displaying a gaze pattern, and is coaxial with respect to the visual axis of the eye axis measuring device 2, the aberration measuring device 3, and the eye 23 to be tested. The fixation device 30 is optically coupled to the eye axis measuring device 2 and the aberration measuring device 3 by the beam splitting cube 8. The other optical path principles are the same as those described above, and are not described herein again.

The whole eyeball biomeasurement system of the invention is greatly helpful for accurate planning of the operation in relevant ophthalmic operations (such as keratotomy, crystal implantation and the like) for measuring the retinal defocus and the high-order aberration of the human eye, and can improve the operation effect.

Based on the above embodiments, another embodiment of the present invention further provides a measuring method of the whole eyeball biometric system as described in the above embodiments, as shown in fig. 1 or fig. 5.

The measuring method comprises the following steps:

the measuring light emitted by the light source 4 enters the eye 23 after passing through the eye axis measuring device 2, a part of the light reflected by the eye 23 enters the aberration measuring device 3 for measuring the wavefront aberration, and the other part of the light returns to the eye axis measuring device 2 for measuring the length of the eye axis.

Further, the measurement method further includes: the angle of the measuring light incident on the eye 23 to be measured is changed by the rotating device, the length of the eye axis at different angles is obtained by the eye axis measuring device 2, and the aberration at different angles is obtained by the aberration measuring device 3.

In the embodiment of the present invention, when the optical paths of the light reflected by the eye 23 to be measured reaching the fixed reflection device 10 and the movable reflection device 11 are equal, the detection device 15 obtains a first interference signal to obtain a first position of the movable reflection device 11; moving said movable reflecting means 11 on the optical path, acquiring a second position of said movable reflecting means 11 when said detecting means 15 acquires a second interference signal; acquiring the distance between the first position and the second position as the length of the eye axis.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A whole-eye biometric system, comprising: a light source, an eye axis measuring device and an aberration measuring device; the light source is used for emitting measuring light, the measuring light enters the eye to be measured after passing through the eye axis measuring device, and the light reflected by the eye to be measured respectively enters the eye axis measuring device and the aberration measuring device; the eye axis measuring device is used for measuring the eye axis length of the tested eye, and the aberration measuring device is used for measuring the aberration of the tested eye.

2. The whole eye biometric system according to claim 1, wherein the eye axis measuring device comprises: the device comprises a first light splitting device, a second light splitting device, a fixed reflecting device, a movable reflecting device and a detecting device; a part of light after passing through the first light splitting device is incident to the fixed reflecting device, the other part of light is incident to the movable reflecting device, the light beams emitted by the fixed reflecting device and the movable reflecting device are combined and then are incident to the eye to be detected through the second light splitting device, and the light reflected by the eye to be detected is received through the second light splitting device; the distance between the movable reflection device and the first light splitting device is adjustable.

3. The whole eye biometric system according to claim 2, wherein the light exiting from the fixed reflective device is parallel to or coincident with the incident light, and the light exiting from the movable reflective device is parallel to or coincident with the incident light.

4. The whole eye biometric system according to claim 1, wherein the aberration measuring means comprises: a filtering device and a wavefront sensor; the light reflected by the tested eye firstly enters the filtering device for filtering and then enters the wavefront sensor, and the aberration of the tested eye is obtained through the signal received by the wavefront sensor.

5. The whole eye biometric system according to claim 1, further comprising: a third light splitting device; and part of light reflected by the tested eye enters the aberration measuring device after passing through the third light splitting device, and the other part of light returns to the eye axis measuring device.

6. The biometric system according to any one of claims 1 to 5, wherein the biometric system is mounted on a rotating device for rotating the measuring light incident on the eye to be measured around the pupil center of the eye to be measured.

7. The whole eye biometric system according to claim 1, further comprising: a fixation device for providing a fixation target to the eye to be tested to guide the eye to be tested to gaze.

8. A measuring method of the whole eye biometric system according to claim 1, wherein the measuring method comprises:

the measuring light emitted by the light source enters the eye to be measured after passing through the eye axis measuring device, one part of the light reflected by the eye to be measured enters the aberration measuring device to measure the wavefront aberration, and the other part of the light returns to the eye axis measuring device to measure the eye axis length.

9. The measurement method according to claim 8, further comprising: and changing the angle of the measuring light incident to the measured eye to obtain the axial length and the aberration under different angles.

10. The measurement method according to claim 8, wherein the eye axis measurement device comprises: the device comprises a light splitting device, a fixed reflecting device, a movable reflecting device and a detecting device, wherein a part of light passing through the light splitting device is incident to the fixed reflecting device, and the other part of light is incident to the movable reflecting device; the measurement of the length of the eye axis by the eye axis measuring device specifically comprises:

when the optical paths of the light reflected by the tested eye to the fixed reflecting device and the movable reflecting device are equal, the detecting device obtains a first interference signal and obtains a first position of the movable reflecting device;

moving the movable reflecting device on the optical path, and acquiring a second position of the movable reflecting device when the detecting device acquires a second interference signal;

acquiring the distance between the first position and the second position as the length of the eye axis.

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