Artificial lens system and focus adjustment method thereof

Abstract

The present invention belongs to the field of artificial lenses, and specifically discloses an artificial lens system and a method for adjusting the focal length thereof. The artificial lens system includes an artificial lens with adjustable focal length, and the artificial lens with adjustable focal length includes: an annular bracket; a plurality of lenses arranged at the center of the annular bracket, and the plurality of lenses are stacked and arranged along the axial direction of the annular bracket; and a multi-layer artificial muscle arranged between the annular bracket and the plurality of lenses, and the multi-layer artificial muscle is stacked and arranged along the axial direction of the annular bracket, and one end of each layer of artificial muscle is connected to the annular bracket, and the other end is connected to one of the plurality of lenses, and each layer of artificial muscle can be bent and deformed in the axial direction of the annular bracket under the action of a supply voltage to drive the lens connected thereto to move axially. The artificial lens system provided by the present invention has the advantages of adjustable focal length, large adjustment range, simple and easy-to-control adjustment method, and high adjustment accuracy.

Description

Technical Field

[0001] The invention belongs to the field of artificial lenses, and in particular relates to an artificial lens system and a focal length adjustment method thereof. Background Art

[0002] Due to the disorder of lens metabolism, the lens protein denatures and becomes turbid, so that the light is blocked by the turbid lens and cannot reach the retina, which causes vision loss and forms cataracts. Cataract patients have blurred vision and may even be blind in severe cases. Surgery is an effective means of treating cataracts. Ultrasound is used to crush the lens nucleus into a chyle, and then the chyle lens nucleus is sucked out, but the lens capsule is retained. The capsule is retained and a posterior chamber intraocular lens is implanted at the same time, and vision can be restored after surgery. The implanted intraocular lens may not be "fitting". Unlike the lens of a normal person, the intraocular lens can change its shape under the action of the ciliary muscle to adjust the light entering the eye to focus on the macula of the retina. After the patient uses the intraocular lens, because the intraocular lens has no adjustment function, it cannot automatically focus the light emitted (reflected) by near and far objects on the macula as needed, which causes some visual discomfort: for example, if the vision is good at far distance, the vision is poor at near distance; if the vision is good at near distance, the vision is poor at far distance.

[0003] In order to enable patients to have clear vision at both near and far distances after implanting artificial lenses, traditional technology further proposes multifocal artificial lenses and adjustable artificial lenses. Among them, multifocal artificial lenses, that is, artificial lenses with multiple focal lengths of different lengths on the lens, so that after the near and far light passes through the multifocal artificial lens, part of the light will form a clear image on the retina. However, this multifocal artificial lens forms multiple imaging focuses in the eye, which requires the brain to "adapt", and the patient will have problems such as glare, halo or poor night vision. These multifocal artificial lenses are not adjustable artificial lenses and cannot fully realize the normal adjustment function of the eye. For adjustable artificial lenses, patients implanted with the lens can change the shape of the lens through the relaxation and contraction of their own ciliary muscles to achieve far and near vision. However, for older patients, the contraction force of the intraocular muscles themselves is relatively small, and the elasticity of the lens fibers in the lens capsule becomes poor, which increases the force required for adjustment. Therefore, the ability to adjust is limited and cannot truly meet the function of adjustable artificial lenses.

[0004] Therefore, an intraocular lens with adjustable focal length is urgently needed in the art. Summary of the invention

[0005] The object of the present invention is to provide an artificial lens with adjustable focal length, so as to overcome the defect that the artificial lens in the prior art has no self-adjustment ability or has limited self-adjustment ability.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] According to a first aspect of the present invention, there is provided an intraocular lens system, comprising an intraocular lens with adjustable focal length, wherein the intraocular lens with adjustable focal length comprises:

[0008] Ring bracket;

[0009] A plurality of lenses are disposed at the center of the annular support, and the plurality of lenses are stacked and arranged along the axial direction of the annular support; and

[0010] A multi-layer artificial muscle is arranged between the annular bracket and the plurality of lenses, and the multi-layer artificial muscle is stacked along the axial direction of the annular bracket, one end of each layer of artificial muscle is connected to the annular bracket, and the other end is connected to one of the plurality of lenses, and each layer of artificial muscle can bend and deform in the axial direction of the annular bracket under the action of a supplied voltage to drive the lens connected thereto to move axially.

[0011] According to one embodiment of the present invention, the intraocular lens system further comprises:

[0012] A bioelectric signal acquisition unit, which is attached to the surface of the human ciliary muscle and is used to collect bioelectric signals generated by the contraction of the human ciliary muscle; and

[0013] A control unit, the control unit is in communication with the bioelectric signal acquisition unit, and the control unit is configured to:

[0014] receiving the bioelectric signal from the bioelectric signal acquisition unit; and

[0015] Based on the bioelectric signal, the supply voltage of at least one layer of artificial muscle is controlled to adjust the system focal length of the artificial lens.

[0016] According to one embodiment of the present invention, the control unit is further configured to:

[0017] Based on the bioelectric signal, obtaining a first expected system focal length of the intraocular lens through a first data model, wherein the first data model is a corresponding relationship model between the bioelectric signal and the first expected system focal length;

[0018] Based on the first desired system focal length of the intraocular lens, an optimal focal length adjustment scheme is obtained through a second data model, wherein the second data model is a corresponding relationship model between the first desired system focal length and the axial displacement of each lens; and

[0019] Based on the optimal focal length adjustment scheme, the supply voltage of at least one layer of artificial muscle is controlled to adjust the system focal length of the artificial lens to the first desired system focal length.

[0020] According to one embodiment of the present invention, the optimal focal length adjustment scheme includes the identity data of the lens that needs to be moved axially and its axial displacement data,

[0021] The control unit is configured to:

[0022] Based on the identity data of the lens that needs to be axially moved in the optimal focal length adjustment scheme and its axial displacement data, an expected supply voltage of the artificial muscle connected to the corresponding lens is obtained through a third data model, wherein the third data model is a corresponding relationship model between the axial displacement of the lens and the expected supply voltage of the corresponding artificial muscle; and

[0023] The desired supply voltage is applied to the corresponding artificial muscle to adjust the system focal length of the artificial lens to the first desired system focal length.

[0024] According to one embodiment of the present invention, at least some of the plurality of lenses are configured as liquid lenses, and the curvature of the lens surface of the liquid lens can be changed by adjusting an applied voltage.

[0025] The control unit is further configured to: based on the bioelectric signal, control the supply voltage of at least one layer of artificial muscle and / or the applied voltage of at least one liquid lens to adjust the system focal length of the artificial lens.

[0026] According to one embodiment of the present invention, the control unit is further configured to:

[0027] Based on the bioelectric signal, obtaining a second desired system focal length of the intraocular lens through a fourth data model, wherein the fourth data model is a corresponding relationship model between the bioelectric signal and the second desired system focal length;

[0028] Based on the second desired system focal length of the intraocular lens, an optimal focal length adjustment scheme is obtained through a fifth data model, wherein the fifth data model is a correspondence relationship model between the second desired system focal length and the axial displacement of each lens and the lens surface curvature of each liquid lens;

[0029] Based on the optimal focal length adjustment scheme, the supply voltage of at least one layer of artificial muscle and / or the applied voltage of at least one liquid lens are controlled to adjust the system focal length of the artificial lens to the second desired system focal length.

[0030] According to one embodiment of the present invention, the optimal focal length adjustment scheme includes the identity data of the lens that needs to be moved axially and its axial displacement data and / or the identity data of the liquid lens that needs to adjust the lens surface curvature and its lens surface curvature data,

[0031] The control unit is further configured to:

[0032] Based on the identity data of the lens that needs to be axially moved in the optimal focal length adjustment scheme and its axial displacement data, the expected supply voltage of the artificial muscle connected to the corresponding lens is obtained through a sixth data model, wherein the sixth data model is a corresponding relationship model between the axial displacement of the lens and the expected supply voltage of the corresponding artificial muscle; and

[0033] applying the desired supply voltage to the corresponding artificial muscle; and / or

[0034] Based on the identity data of the liquid lens whose lens surface curvature needs to be adjusted in the optimal focal length adjustment scheme and its lens surface curvature data, an expected applied voltage of the corresponding liquid lens is obtained through a seventh data model, wherein the seventh data model is a corresponding relationship model between the lens surface curvature of the liquid lens and the expected applied voltage; and

[0035] The desired external voltage is applied to the corresponding liquid lens.

[0036] According to one embodiment of the present invention, the artificial lens further comprises a wireless receiving coil disposed on the annular support, wherein the wireless receiving coil is used to receive wireless induction power and to supply power to components of the artificial lens.

[0037] According to one embodiment of the present invention, the artificial muscle is ring-shaped, with its outer edge connected to the ring-shaped support and its inner edge connected to the lens.

[0038] According to one embodiment of the present invention, the artificial muscle comprises a plurality of annular electrodes, which are concentrically arranged at intervals and are used to control the bending deformation amplitude of the artificial muscle.

[0039] According to one embodiment of the present invention, each lens is connected to at least one layer of artificial muscle.

[0040] According to one embodiment of the present invention, the control unit is further configured to:

[0041] Divide the focal length of the system into several non-overlapping ranges and establish the corresponding relationship between each range and the corresponding sub-model in advance;

[0042] When a corresponding expected system focal length is obtained based on the bioelectric signal, determining a range to which the corresponding expected system focal length belongs and a sub-model corresponding to the range;

[0043] The optimal focus adjustment solution is selected from the corresponding sub-model.

[0044] According to a second aspect of the present invention, a method for adjusting the focus of an intraocular lens system is provided. The intraocular lens system is the intraocular lens system according to the first aspect of the present invention. The method for adjusting the focus comprises the following steps:

[0045] When the human eye observes an object, the bioelectric signal generated by the contraction of the human ciliary muscle is collected;

[0046] Based on the bioelectric signal, obtaining the system focal length of the artificial lens through a corresponding data model;

[0047] Based on the system focal length of the intraocular lens, an optimal focal length adjustment scheme is obtained through a corresponding data model;

[0048] Based on the optimal focus adjustment scheme, the supply voltage of at least one layer of artificial muscle and / or the applied voltage of at least one liquid lens are controlled.

[0049] According to an embodiment of the present invention, when determining the optimal focus adjustment solution, one or more factors including focus adjustment time, the number of adjustment components, and adjustment accuracy are considered.

[0050] According to one embodiment of the present invention, when determining the optimal focal length adjustment scheme, the focal length adjustment time and the number of lens movements are considered, and the scheme with the shortest focal length adjustment time is preferentially selected as the optimal focal length adjustment scheme, and the scheme with the least number of lens movements is secondly selected as the optimal focal length adjustment scheme.

[0051] According to one embodiment of the present invention, when determining the optimal focal length adjustment scheme, the focal length adjustment time, system accuracy and the number of lens movements are considered, and the scheme with the shortest focal length adjustment time is preferentially selected as the optimal focal length adjustment scheme, followed by the scheme with the highest system accuracy as the optimal focal length adjustment scheme, and finally the scheme with the least number of lens movements is selected as the optimal focal length adjustment scheme.

[0052] By adopting the above technical solution, the present invention has at least one of the following beneficial effects:

[0053] The artificial lens system provided by the present invention, by providing multiple lenses and multiple layers of artificial muscles, can adjust the system focal length of the artificial lens by adjusting the supply voltage of at least one layer of artificial muscle to cause its bending deformation, thereby driving the corresponding lens to move axially; by providing at least some of the multiple lenses as liquid lenses, the system focal length of the artificial lens can be adjusted by adjusting the external voltage of at least one liquid lens to change its lens surface curvature; by providing multiple layers of artificial muscles and multiple liquid lenses, the system focal length of the artificial lens can be adjusted by controlling the supply voltage of at least one layer of artificial muscle and / or the external voltage of at least one liquid lens.

[0054] The artificial lens system provided by the present invention has the advantages of adjustable focal length and large adjustment range, simple and easy-to-control adjustment method, high adjustment accuracy, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0056] Figure 1 A schematic structural diagram of an intraocular lens with adjustable focal length provided by an embodiment of the present invention;

[0057] Figure 2 A schematic structural diagram of an intraocular lens with adjustable focal length provided by another embodiment of the present invention;

[0058] Figure 3 A schematic diagram of the state of the focal length adjustable artificial lens provided by the present invention after being implanted into a human eye;

[0059] Figure 4 A schematic diagram of the structure of a liquid lens used in one embodiment of the present invention;

[0060] Figure 5 A front view of a ring-shaped bracket used in one embodiment of the present invention;

[0061] Figure 6 for Figure 5 A partial cross-sectional view of the annular main body of the annular bracket shown;

[0062] Figure 7 for Figure 5 A schematic structural diagram of the annular cover portion of the annular bracket shown;

[0063] Figure 8 A schematic diagram of the working principle of the artificial muscle used in one embodiment of the present invention;

[0064] Fig. 9 A schematic diagram of the structure of an artificial muscle used in an embodiment of the present invention;

[0065] Fig.10 The present invention provides a flow chart of a focal length adjustment method according to an embodiment of the present invention.

[0066] Description of Reference Numerals

[0067] 1. Artificial lens;

[0068] 11 annular bracket; 111 annular main body; 1111 inner side wall; 1112 outer side wall; 1113 bottom wall; 1114 snap opening; 112 annular cover plate; 1121 inner edge; 1122 outer edge; snap protrusion 1123;

[0069] 12 lens; 121 container; 122 first circular glass sheet; 123 second circular glass sheet; 124 electrolyte; 125 non-electrolyte; 126 lens layer; 127 first metal electrode; 128 second metal electrode; 129 insulating material;

[0070] 13 artificial muscle; 131 annular electrode; 132 first electrically controlled bending region, 133 second electrically controlled bending region; 134 third electrically controlled bending region;

[0071] 14 wireless receiving coil;

[0072] 2 Lens capsule; 3 Ciliary body; 4 Sclera; 5 Retina; 6 Vitreous body; 7 Cornea. DETAILED DESCRIPTION

[0073] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0074] It should be noted that, in the description of the present invention, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "longitudinal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0075] In the description of the present invention, the terms "include", "comprising", "having" and the like indicate non-exclusive inclusion, and the terms "first", "second" and the like are used to distinguish different objects rather than to describe a specific order. The meaning of "plurality" refers to two or more, unless otherwise clearly and specifically defined.

[0076] In the description of the present invention, when an element is referred to as being "fixed on" or "mounted on" or "disposed on" or "connected to" another element, it may be directly or indirectly located on the other element. For example, when an element is referred to as being "connected to" another element, it may be directly or indirectly connected to the other element.

[0077] It should be noted that the specific structure, features and advantages of the present invention will be specifically described below by way of example, but all descriptions are only for illustration and should not be understood as limiting the present invention in any way. In addition, any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the drawings, can still be combined or deleted arbitrarily between these technical features (or their equivalents), so as to obtain more other embodiments of the present invention that may not be directly mentioned herein.

[0078] As mentioned in the background technology section, the artificial lens in the prior art does not have the self-adjustment capability or has limited self-adjustment capability. Therefore, the present invention aims to provide an artificial lens with adjustable focal length to solve the above problem.

[0079] A first aspect of the present invention provides an intraocular lens system including an intraocular lens with adjustable focal length. Figure 1-3 As shown, the intraocular lens 1 with adjustable focal length comprises: an annular support 11; a plurality of lenses 12 arranged at the center of the annular support 11, the plurality of lenses 12 being stacked and arranged along the axial direction A of the annular support 11; and a multi-layer artificial muscle 13 arranged between the annular support 11 and the plurality of lenses 12, the multi-layer artificial muscle 13 being stacked and arranged along the axial direction A of the annular support 11, one end of each layer of artificial muscle 13 being connected to the annular support 11, and the other end being connected to one of the plurality of lenses 12, and each layer of artificial muscle 13 being able to bend and deform in the axial direction A of the annular support 11 under the action of a supply voltage to drive the lens 12 connected thereto to move axially. The intraocular lens system provided by the present invention, by providing a plurality of lenses 12 and a plurality of multi-layer artificial muscles 13, can change the bending deformation of at least one layer of artificial muscle 13 by adjusting the supply voltage of at least one layer of artificial muscle 13, drive the corresponding lens 12 to move axially, thereby adjusting the system focal length of the intraocular lens 1.

[0080] Figure 1 The schematic diagram of the structure of an artificial lens with adjustable focal length provided by an embodiment of the present invention is shown. In this embodiment, two lenses 12 and two layers of artificial muscles 13 are provided, and each lens 12 is connected to a layer of artificial muscle 13. Figure 2A schematic diagram of the structure of an artificial lens with adjustable focal length provided by another embodiment of the present invention is shown. In this embodiment, three lenses 12 and three layers of artificial muscles 13 are provided, and each lens 12 is connected to a layer of artificial muscle 13. Although in the illustrated embodiment, the number of lenses 12 is consistent with the number of layers of artificial muscles 13, in other embodiments, the number of lenses 12 may also be inconsistent with the number of layers of artificial muscles 13, for example, the number of lenses 12 is less than the number of layers of artificial muscles 13, and each lens 12 may be connected to more than one layer of artificial muscles 13. Although this article provides an embodiment in which two or three lenses 12 are provided, it should be understood that the number of lenses 12 is not limited thereto, and more than three lenses 12 may also be provided.

[0081] During use, the focal length adjustable artificial lens 1 provided by the present invention needs to be implanted in the lens capsule of a human eye. Figure 3 The diagram shows the state of the artificial lens 1 provided by the present invention after being implanted in the human eye. As shown in the figure, the artificial lens 1 provided by the present invention is implanted in the lens capsule 2 of the human eyeball, and the lens capsule 2 is expanded and fixed by the lens capsule 2. In the installed state, the axis of the annular support 11 of the artificial lens 1 coincides with the eye axis (or corneal axis) of the human eye. Figure 3 In the figure, reference numeral 3 indicates ciliary body, reference numeral 4 indicates sclera, reference numeral 5 indicates retina, reference numeral 6 indicates vitreous body, and reference numeral 7 indicates cornea. The focal length adjustable artificial lens 1 provided by the present invention is made into an integral part by connecting an annular support 11, a plurality of lenses 12, and a multi-layer artificial muscle 13, which can be conveniently implanted into the lens capsule 2, avoiding the calibration and adjustment of the relative positions of different components during the surgical installation process and the user's use process, thereby reducing the complexity of the operation.

[0082] In some embodiments, in order to achieve adaptive adjustment of the focal length of the artificial lens, the artificial lens system further includes a bioelectric signal acquisition unit and a control unit. The bioelectric signal acquisition unit is attached to the surface of the human ciliary muscle and is used to collect the bioelectric signal generated by the contraction of the human ciliary muscle. The control unit is communicatively connected to the bioelectric signal acquisition unit, and the control unit is configured to receive the bioelectric signal from the bioelectric signal acquisition unit and control the supply voltage of at least one layer of artificial muscle 13 based on the bioelectric signal to adjust the system focal length of the artificial lens 1.

[0083] In some embodiments, the bioelectric signal acquisition unit includes a plurality of metal electrode contacts, which are respectively attached to different positions of the ciliary muscle for real-time sensing of the bioelectric signal generated by the contraction of the ciliary muscle. The ciliary muscle includes striated muscle and ciliary muscle. The metal electrode contacts are respectively attached to the striated muscle and the ciliary muscle to respectively collect the bioelectric signals generated when the striated muscle and the ciliary muscle contract, and the one with the larger bioelectric signal intensity is transmitted to the control unit for adjusting the system focal length of the artificial lens 1.

[0084] In some embodiments, the bioelectric signal acquisition unit includes a thin film varistor, which is used to change resistance as the ciliary muscle contracts. Compared with collecting bioelectric signals, muscle contraction is easier to detect, and the muscle contraction can be sensed by the thin film varistor, and the muscle contraction is converted into resistance change to control the system focal length of the intraocular lens.

[0085] In some embodiments, the control unit may be disposed on the annular support 11 .

[0086] In some embodiments, the control unit is configured to: obtain a first desired system focal length of the intraocular lens 1 through a first data model based on the bioelectric signal, wherein the first data model is a correspondence model between the bioelectric signal and the first desired system focal length; obtain an optimal focal length adjustment scheme through a second data model based on the first desired system focal length of the intraocular lens 1, wherein the second data model is a correspondence model between the first desired system focal length and the axial displacement of each lens; and control the supply voltage of at least one layer of artificial muscle to adjust the system focal length of the intraocular lens 1 to the first desired system focal length based on the optimal focal length adjustment scheme. The first data model can be obtained by calculation based on big data, and the second data model can be pre-established based on the parameter setting of the intraocular lens 1 through measurement or simulation.

[0087] In some embodiments, the control unit is configured to: based on the first desired system focal length of the artificial lens 1, obtain all focal length adjustment schemes that can achieve the first desired system focal length through the second data model; select a focal length adjustment scheme from all focal length adjustment schemes as the optimal focal length adjustment scheme. When selecting the optimal focal length adjustment scheme, factors such as the number of lens movements, focal length adjustment time, and adjustment accuracy can be considered. Generally speaking, the fewer the number of lens movements, the shorter the focal length adjustment time, the higher the adjustment accuracy, the faster and more accurately the adaptive adjustment of the focal length can be achieved, and the better the user's experience of the artificial lens. To this end, the scheme with the least number of lens movements can be selected from all focal length adjustment schemes as the optimal focal length adjustment scheme. Among them, the "focal length adjustment time" is the total time required to adjust to the desired system focal length.

[0088] In some embodiments, in order to improve the user's experience of the intraocular lens, that is, to enable the user to see objects faster and more clearly, the control unit is configured to: divide the system focal length into several non-overlapping ranges, for example, a first range and a second range; pre-establish a correspondence between each range and a corresponding sub-model, for example, the first range corresponds to the system focal length adjustment range that can be achieved by axially moving the first lens of the plurality of lenses, the first sub-model corresponding to the first range is a correspondence model between the first desired system focal length and the axial displacement of the first lens, the second range corresponds to the system focal length adjustment range that can be achieved by axially moving the first lens and the second lens of the plurality of lenses, the second sub-model corresponding to the second range is a correspondence model between the first desired system focal length and the axial displacement of the first lens and the second lens. When the first desired system focal length of the intraocular lens 1 is obtained, first determine the range to which the first desired system focal length belongs, for example, whether it belongs to the first range or the second range, then determine the corresponding sub-model based on the range to which the first desired system focal length belongs, and select the scheme that can achieve the first desired system focal length from the corresponding sub-model as the optimal focal length adjustment scheme. This pre-range division method helps to determine the best focus adjustment solution more quickly, so as to achieve adaptive focus adjustment more quickly.

[0089] In this case, the optimal focal length adjustment scheme includes the identity data of the lens that needs to be moved axially and its axial displacement data. The control unit is configured to: based on the identity data of the lens that needs to be moved axially in the optimal focal length adjustment scheme and its axial displacement data, obtain the expected supply voltage of the artificial muscle connected to the corresponding lens through a third data model, wherein the third data model is a correspondence model between the axial displacement of the lens and the expected supply voltage of the corresponding artificial muscle; and apply the expected supply voltage to the corresponding artificial muscle to adjust the system focal length of the artificial lens 1 to the first expected system focal length. The third data model can be pre-established based on the parameter setting of the artificial lens 1 through measurement or simulation. The identity data of the lens that needs to be moved axially can be any data indicating the identity of the lens that needs to be moved axially, and the identity data is associated one-to-one with the lens. For example, the identity data can be the number information of the lens.

[0090] In some embodiments, the control unit is configured to pre-process the bioelectric signal received from the bioelectric signal acquisition unit and transmit the pre-processed bioelectric signal to the first data model. The pre-processing here may include feature extraction, screening, amplification, etc. of the signal.

[0091] In some embodiments, at least some of the multiple lenses 12 are configured as liquid lenses, and the curvature of the lens surface of the liquid lens can be changed by adjusting the applied voltage. The control unit is also configured to: based on the bioelectric signal, control the supply voltage of at least one layer of artificial muscle and / or the applied voltage of at least one liquid lens to adjust the system focal length of the artificial lens. In the case of providing multiple liquid lenses, the multiple liquid lenses can be selected from liquid lenses with the same parameter indicators, or liquid lenses with different parameter indicators.

[0092] Liquid lens uses liquid as a lens and changes the focal length by changing the curvature of the liquid. In some embodiments, the liquid lens 12 is a variable focus optical lens using the principle of electrowetting on dielectric (EWOD), also known as a liquid zoom lens. Figure 4 An example structure of a liquid lens is given. The overall shape of the liquid lens 12 is like a cylinder. Figure 4 It is a side view, and its central axis is the horizontal direction in the figure. In the installed state, the liquid lens 12 is coaxially arranged with the annular bracket 11, that is, the central axis of the liquid lens 12 coincides with the central axis of the annular bracket 11. The liquid lens 12 includes a cylindrical container 121 containing liquid and a first circular glass sheet 122 and a second circular glass sheet 123 respectively located on the left and right sides of the container 121. Two liquids are filled in the container 121, one of which is an electrolyte and the other is a non-electrolyte. In the embodiment shown, the electrolyte 124 is located on the left side of the container 121, and the non-electrolyte 125 is located on the right side of the container 121. Since the two liquids are immiscible, they will naturally form a clearly visible lens layer 126 at their contact surface, which has a converging effect on the light. The inner side wall of the container 121 is divided into two layers: one layer is cylindrical and the other layer is truncated cone, and both layers are provided with metal electrodes, namely the first metal electrode 127 and the second metal electrode 128. A layer of insulating material 129 is applied between the two metal electrodes 127 and 128 to prevent electrical conduction between the two electrodes.

[0093] The zoom principle of the liquid lens 12 is as follows: since the electrolyte 124 and the non-electrolyte 125 are immiscible with each other, when no voltage is applied, a symmetrical lens film is naturally formed at the liquid interface under the interaction of surface tension, and the focal length of the liquid lens 12 is fixed at this time; when voltage is applied to the liquid lens 12, under the action of the electric field, the electric charge between the contact surfaces changes, thereby generating an external force that makes the original surface tension no longer balanced, and a new balance is reached under the action of the external force, thereby changing the radius of curvature of the lens surface 126, and then changing the focal length of the liquid lens 12.

[0094] In some embodiments where the lens 12 is set as a liquid lens, the control unit is further configured to optionally adjust the system focal length of the artificial lens 1 by controlling the applied voltage of at least one liquid lens. Specifically, the control unit is further configured to: based on the bioelectric signal, obtain the second desired system focal length of the artificial lens 1 through the fourth data model, wherein the fourth data model is a correspondence model between the bioelectric signal and the second desired system focal length; based on the second desired system focal length of the artificial lens 1, obtain the best focal length adjustment scheme through the fifth data model, wherein the fifth data model is a correspondence model between the second desired system focal length and the axial displacement of each lens and the lens surface curvature of each liquid lens; based on the best focal length adjustment scheme, control the supply voltage of at least one layer of artificial muscle and / or the applied voltage of at least one liquid lens to adjust the system focal length of the artificial lens to the second desired system focal length. Wherein, the fourth data model may be the same as or different from the first data model, the fourth data model may be calculated based on big data, and the fifth data model may be pre-established based on the parameter setting of the artificial lens 1 through measurement or simulation.

[0095] In some embodiments, the control unit is configured to: based on the second desired system focal length of the artificial lens 1, obtain all focal length adjustment schemes that can achieve the second desired system focal length through the fifth data model; select a focal length adjustment scheme from all focal length adjustment schemes as the best focal length adjustment scheme. When selecting the best focal length adjustment scheme, one or more of the factors such as the number of adjustment components, focal length adjustment time, and adjustment accuracy can be considered, wherein the "number of adjustment components" is the number of components that need to be adjusted or changed to adjust to the desired system focal length, and the "adjustment components" here include liquid lenses and artificial muscles. There is an intricate relationship between the number of adjustment components, focal length adjustment time, and adjustment accuracy.

[0096] In some embodiments, in order to improve the user's experience of the artificial lens, that is, to enable the user to see objects faster and more clearly, the control unit is configured to: divide the system focal length into several non-overlapping ranges, for example, a first range, a second range, and a third range; consider the above factors to pre-establish a correspondence between each range and a corresponding sub-model. For example, considering that compared to adjusting the supply voltage of the artificial muscle to adjust the axial displacement of the lens, adjusting the external voltage of the liquid lens to adjust the lens surface curvature of the liquid lens has the advantages of fast adjustment speed and high adjustment accuracy, the first range corresponds to the system focal length adjustment range that can be achieved by adjusting the external voltage of the liquid lens, and the first sub-model corresponding to the first range is the second desired system focal length adjustment range. The corresponding relationship model between the system focal length and the lens surface curvature of each liquid lens, the second range corresponds to the system focal length adjustment range that can be achieved by adjusting the external voltage of the liquid lens and axially moving the first lens of the multiple lenses, the second sub-model corresponding to the second range is the corresponding relationship model between the second expected system focal length and the lens surface curvature of each liquid lens and the axial displacement of the first lens, the third range corresponds to the system focal length adjustment range that can be achieved by adjusting the external voltage of the liquid lens and axially moving the first lens and the second lens of the multiple lenses, and the third sub-model corresponding to the third range is the corresponding relationship model between the second expected system focal length and the lens surface curvature of each liquid lens and the axial displacement of the first lens and the second lens. When the second expected system focal length of the artificial lens 1 is obtained, the range to which the second expected system focal length belongs is first determined, for example, whether it belongs to the first range, the second range or the third range, and then the corresponding sub-model is determined based on the range to which the second expected system focal length belongs, and the scheme that can achieve the second expected system focal length is selected from the corresponding sub-model as the optimal focal length adjustment scheme. This method of pre-dividing the range helps to determine the optimal focal length adjustment scheme more quickly, so as to achieve adaptive adjustment of the focal length more quickly.

[0097] In this case, the optimal focal length adjustment scheme includes the identity data of the lens that needs to be moved axially and its axial displacement data and / or the identity data of the lens that needs to adjust the lens surface curvature and its lens surface curvature data. The control unit is also configured to: based on the identity data of the lens that needs to be moved axially in the optimal focal length adjustment scheme and its axial displacement data, obtain the supply voltage of the artificial muscle connected to the corresponding lens through the sixth data model, wherein the sixth data model is a correspondence relationship model between the axial displacement of the lens and the expected supply voltage of the corresponding artificial muscle, and apply the expected supply voltage to the corresponding artificial muscle; and / or, based on the identity data of the liquid lens that needs to adjust the lens surface curvature in the optimal focal length adjustment scheme and its lens surface curvature data, obtain the expected external voltage of the corresponding liquid lens through the seventh data model, wherein the seventh data model is a correspondence relationship model between the lens surface curvature of the liquid lens and the expected external voltage, and apply the expected external voltage to the corresponding liquid lens. Wherein, the sixth data model and the seventh data model can be pre-established based on the parameter setting of the artificial lens 1 through measurement or simulation.

[0098] In some embodiments, the artificial lens 1 further includes: a wireless receiving coil 14 disposed on the annular support 11, the wireless receiving coil 14 being used to receive wireless induced electrical energy and to power the artificial muscle 13 and / or the liquid lens 12. Specifically, the wireless receiving coil 15 is used to sense electromagnetic waves sent by an external device to obtain an alternating current induced electromotive force. The external device may be, for example, wearable glasses. A wireless transmitting coil may be integrated on the wearable glasses (such as its frame), and the wireless transmitting coil may send electromagnetic waves to the wireless receiving coil 14, so that the wireless receiving coil 14 induces electrical energy. In the present invention, the use of the wireless receiving coil 14 for powering realizes the passive design of the internal circuit, which is used to ensure the safety of the human eye.

[0099] Some components of the intraocular lens 1 are described in detail below.

[0100] Ring bracket

[0101] The annular support 11 is used to expand the lens capsule 2. The friction between the outer side of the annular support 11 and the inner wall of the lens capsule 2 can prevent the intraocular lens 1 from twisting, translating and rotating in the lens capsule 2. The annular support 11 can be made of a flexible material with good biocompatibility, such as titanium alloy, platinum-iridium alloy, etc.

[0102] The wireless receiving coil 14 and the optional control unit are mounted on the annular bracket 11. In some embodiments, the annular bracket 11 is formed with an annular closed chamber, and the wireless receiving coil 14 and the optional control unit can be accommodated in the closed chamber, so as to protect the wireless receiving coil 14 and the optional control unit. In other embodiments, the annular bracket 11 is formed with an unenclosed mounting portion, and the wireless receiving coil 14 and the optional control unit can be mounted in the unenclosed mounting portion.

[0103] Figure 5-7 An example structure of the annular support 11 is shown. As shown in the figure, the annular support 11 is composed of Figure 6 The annular main body 111 and Figure 7 The annular cover plate portion 112 shown is composed of two parts. The annular main body portion 111 and the annular cover plate portion 112 are assembled together to form a closed chamber for accommodating the wireless receiving coil 14.

[0104] like Figure 6 As shown, the cross section of the annular main body 111 is U-shaped, and the annular main body 111 is composed of an inner side wall 1111 located on the inner side, an outer side wall 1112 located on the outer side, and a bottom wall 1113 connecting the inner side wall 1111 and the outer side wall 1112. The inner side wall 1111 and the outer side wall 1112 form two side parts of the U shape, and the bottom wall 1113 forms the bottom of the U. A plurality of buckle openings 1114 are provided on the inner side wall 1111 and the outer side wall 1112 at intervals.

[0105] like Figure 7 As shown, a plurality of snap protrusions 1123 are spaced apart on the inner edge 1121 and the outer edge 1122 of the annular cover portion 112, and the snap protrusions 1123 can be snapped into the snap openings 1114 on the annular main body portion 111, so that the annular cover portion 112 can be detachably assembled with the annular main body portion 111 to form a closed chamber.

[0106] In some embodiments, in order not to affect wireless power transmission, the annular cover portion 112 can be made of non-metallic materials compatible with human tissue, such as silicone. When in use, the side of the annular bracket 11 with the annular cover portion 112 faces the wireless transmitting coil, so as to facilitate the electromagnetic field to pass through the annular cover portion 112 and induce alternating current on the wireless receiving coil 14. In this case, the multiple snap-on protrusions 1123 radially arranged on the inner edge 1121 of the annular cover portion 112 can be set as metal electrodes embedded in the silicone plate, one end of which extends from the thickness edge of the annular cover portion 112, and the other end extends from the inner surface of the annular cover portion 112 and is electrically connected to the wireless receiving coil 14 arranged on the inner side of the annular cover portion 112.

[0107] In some other embodiments, the annular cover plate portion 112 can be directly used as a wireless receiving coil. Specifically, the annular cover plate portion 112 is made of a metal wire (such as a platinum-iridium alloy wire). The multiple buckle protrusions 1123 radially arranged on the inner edge 1121 of the annular cover plate portion 112 are metal electrodes attached to the surface of the metal wire coil, and an insulating layer is arranged between the two to avoid conductive connection between the two.

[0108] In some embodiments, when the annular cover portion 112 is snapped with the annular main body portion 111, the portion of the snap protrusion 1123 extending out of the snap opening 1114 forms an outer wall fixing portion and an inner wall fixing portion, wherein the outer wall fixing portion is used to connect with the lens capsule 2, and the inner wall fixing portion is used to connect with the artificial muscle 13. In some embodiments, the inner wall fixing portion has different lengths and is used to connect control electrodes at different positions of the artificial muscle 13 (see below for details).

[0109] In some embodiments, the multiple snap-on protrusions 1123 radially arranged on the outer edge 1122 of the annular cover portion 112 are in the shape of a ring handle to facilitate suturing and fixation with the lens capsule 2; the multiple snap-on protrusions 1123 radially arranged on the inner edge 1121 of the annular cover portion 112 are in the shape of a sheet to facilitate conductive bonding with the control electrode of the artificial muscle 13.

[0110] Artificial Muscle

[0111] The artificial muscle 13 mentioned in the present invention, also called electro-induced artificial muscle, electrically driven artificial muscle or electric artificial muscle, refers to an artificial muscle that can bend and deform under the action of a control voltage. The electrically controlled bending direction of the artificial muscle 13 corresponds to the axial direction of the annular bracket 11. The "electrically controlled bending direction" mentioned here refers to the direction in which the artificial muscle bends and deforms under the action of a control voltage. The artificial muscle 13 can swing back and forth under the action of a control voltage, driving the axial position of the lens 12 connected thereto to change relative to the cornea 7, so that the focal length of the eyeball is changed.

[0112] In some embodiments, the artificial muscle 13 is configured as an artificial muscle made of ionic polymer-metal composites (IPMC), which is generally composed of an ion exchange membrane and metal electrodes (such as platinum and gold) attached to both sides of the ion exchange membrane. The ion exchange membrane presents a liquid-solid two-phase structure, and its interior is composed of a hydrophobic polymer grid and movable cations (such as Na ions) and solvents (water molecules). The working principle of IPMC as an electrogenic artificial muscle includes: Figure 8As shown, when voltage is applied to the metal electrodes on both sides of the ion exchange membrane, an electric field will be formed on both sides of the ion exchange membrane, so that the cations inside the ion exchange membrane move toward the cathode under the action of the electric field. At the same time, water molecules will also move toward the cathode under the action of cation migration, so that the concentration of water molecules and cations on the cathode side increases, and the concentration of water molecules and cations on the anode side decreases, thereby forming a concentration gradient difference, which causes the cathode side to expand and the anode side to shrink, resulting in the bending and deformation of the material as a whole. IPMC has the following advantages when used as artificial muscle: 1. Low driving voltage, it can work normally at a voltage of 4-7V; 2. IPMC is suitable for working in a humid environment; 3. It can produce a large displacement; 4. Fast reaction speed, between microseconds and seconds; 5. Compared with the "motor drive + mechanical transmission" mode composed of conventional materials, electro-induced artificial muscles do not require complex transmission mechanisms such as gears and bearings. Its "electricity + chemistry + drive" mode is more direct and effective, and has higher efficiency.

[0113] In some embodiments, the artificial muscle 13 is arranged in a ring shape, with its outer edge connected to the ring support 11 and its inner edge connected to the lens 12. Designing the artificial muscle in a ring shape helps to form a stable support for the lens 12, and its electric control range is larger, and it can provide stronger bending traction.

[0114] In some embodiments, Fig. 9 As shown, the artificial muscle 13 includes a plurality of annular electrodes 131, which are arranged concentrically and spaced apart to control the bending amplitude of the artificial muscle 13. As mentioned above, the bending of the artificial muscle 13 is caused by the movement of ions within the electric field, and the ion concentrations within different ranges are controlled by arranging a plurality of groups of concentric electrodes at intervals. Fig. 9 In the figure, the annular electrode 131 shown by the dotted line is the anode, and the annular electrode 131 shown by the solid line is the cathode. The anode is arranged on the side of the annular muscle close to the inner diameter, and multiple cathodes are arranged to spread outward in sequence, wherein the cathode and the anode are located on both sides of the annular muscle. During use, when different voltage signals are controlled to be applied to different combinations of cathodes and anodes, they will respectively control the cations and water molecules in the first electrically controlled bending area 132, the second electrically controlled bending area 133 or the third electrically controlled bending area 134 to move toward the cathode, thereby controlling the first electrically controlled bending area 132, the second electrically controlled bending area 133 or the third electrically controlled bending area 134 to bend and deform.

[0115] In some embodiments, in order to achieve precise control of the focal length, the parameters for controlling the bending amplitude of the artificial muscle 13 include, in addition to applying voltage signals to different combinations of cathodes and anodes, also controlling the magnitude of the voltage signals, and when the controlled ranges are different, the magnitude ranges of the voltage signals are also different. For example, for the first electrically controlled bending area 132, optionally, the control voltage range is 4-5V, for the second electrically controlled bending area 133, optionally, the control voltage range is 4-6V, and for the third electrically controlled bending area 134, optionally, the control voltage range is 4-7V.

[0116] The second aspect of the present invention provides a method for adjusting the focal length of the intraocular lens system according to the first aspect of the present invention. Fig.10 As shown, the focus adjustment method includes the following steps:

[0117] S1: When the human eye observes an object, the bioelectric signal generated by the contraction of the human ciliary muscle is collected. This can be achieved, for example, by the bioelectric signal collection unit mentioned above.

[0118] S2: Based on the bioelectric signal collected in step S1, obtain the expected system focal length of the intraocular lens through a corresponding data model. The corresponding data model may be the first data model or the fourth data model mentioned above.

[0119] S3: Based on the desired system focal length of the intraocular lens obtained in step S2, an optimal focal length adjustment scheme is obtained through a corresponding data model. The corresponding data model may be the second data model or the fifth data model mentioned above.

[0120] S4: Based on the optimal focal length adjustment scheme obtained in step S3, control the supply voltage of at least one layer of artificial muscle and / or the applied voltage of at least one liquid lens.

[0121] Preferably, in step S3, when selecting the best focal length adjustment scheme, one or more factors including focal length adjustment time, the number of adjustment components and adjustment accuracy may be considered.

[0122] For example, in some cases, when selecting the best focus adjustment scheme, only the focus adjustment time may be considered, and the scheme with the shortest focus adjustment time may be selected as the best focus adjustment scheme.

[0123] In some cases, when selecting the best focal length adjustment scheme, only the number of adjustment components may be considered, and the scheme with the least number of adjustment components is selected as the best focal length adjustment scheme.

[0124] In some cases, when selecting the best focal length adjustment scheme, only the adjustment accuracy may be considered, and the scheme with the highest adjustment accuracy is selected as the best focal length adjustment scheme.

[0125] In some cases, when selecting the best focal length adjustment scheme, the focal length adjustment time and the number of lens movements may be considered, and the scheme with the shortest focal length adjustment time is preferentially selected as the best focal length adjustment scheme, and the scheme with the least number of lens movements is secondly selected as the best focal length adjustment scheme. That is, when multiple focal length adjustment schemes can all achieve the desired system focal length, the scheme with the shortest focal length adjustment time among the multiple focal length adjustment schemes is selected as the best focal length adjustment scheme; when the focal length adjustment times of multiple focal length adjustment schemes are all the shortest, the scheme with the least number of lens movements among the multiple focal length adjustment schemes is selected as the best focal length adjustment scheme.

[0126] In some cases, when selecting the best focal length adjustment scheme, the focal length adjustment time, system accuracy, and the number of lens movements may be considered, and the scheme with the shortest focal length adjustment time is preferentially selected as the best focal length adjustment scheme, followed by the scheme with the highest system accuracy as the best focal length adjustment scheme, and finally the scheme with the least number of lens movements as the best focal length adjustment scheme. That is to say, when multiple focal length adjustment schemes can all achieve the desired system focal length, the scheme with the shortest focal length adjustment time among the multiple focal length adjustment schemes is selected as the best focal length adjustment scheme; when the focal length adjustment times of multiple focal length adjustment schemes are all the shortest, the scheme with the highest system accuracy among the multiple focal length adjustment schemes is selected as the best focal length adjustment scheme; when the system accuracy of multiple focal length adjustment schemes is all the highest, the scheme with the least number of lens movements among the multiple focal length adjustment schemes is selected as the best focal length adjustment scheme.

[0127] In some cases, when selecting the best focal length adjustment scheme, the focal length adjustment time, the number of adjustment components, and the adjustment accuracy may also be comprehensively considered. Specifically, corresponding weight coefficients are assigned to these three factors, and corresponding comprehensive evaluation scores are calculated for multiple schemes that can achieve the desired system focal length, and the best focal length adjustment scheme is selected based on the size of the comprehensive evaluation scores.

[0128] The adjustment accuracy is particularly suitable for a solution for a liquid lens with multiple different parameter indicators. In the case of a liquid lens with multiple different parameter indicators, the adjustment accuracy of the lens surface curvature of each liquid lens will be different. When adjusting the focal length of the system, the system adjustment accuracy can be considered to select the best focal length adjustment solution to minimize the error of the focal length adjustment.

[0129] In summary, the intraocular lens system provided by the present invention has the advantages of adjustable focal length with a large adjustment range, simple and easy-to-control adjustment method, and high adjustment accuracy.

[0130] The above are exemplary embodiments disclosed in the present invention. The order in which the above embodiments of the present invention are disclosed is for description only and does not represent the advantages and disadvantages of the embodiments. However, it should be noted that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope disclosed in the embodiments of the present invention (including the claims) is limited to these examples. Various changes and modifications may be made without departing from the scope defined in the claims. In addition, although the elements disclosed in the embodiments of the present invention may be described or required in individual form, they may also be understood as multiple unless explicitly limited to the singular.

[0131] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. An intraocular lens system, characterized in that: An intraocular lens with adjustable focal length is provided, wherein the intraocular lens with adjustable focal length comprises: Ring bracket; A plurality of lenses are disposed at the center of the annular support, and the plurality of lenses are stacked and arranged along the axial direction of the annular support; and A multi-layer artificial muscle is arranged between the annular support and the plurality of lenses, and the multi-layer artificial muscle is stacked and arranged along the axial direction of the annular support. The artificial muscle is annular in shape, and the outer edge of each layer of artificial muscle is connected to the annular support, and the inner edge is connected to one of the plurality of lenses. Each layer of artificial muscle can bend and deform in the axial direction of the annular support under the action of a supplied voltage to drive the lens connected thereto to move axially.

2. The intraocular lens system according to claim 1, characterized in that The intraocular lens system further comprises: A bioelectric signal acquisition unit, which is attached to the surface of the human ciliary muscle and is used to collect bioelectric signals generated by the contraction of the human ciliary muscle; and A control unit, the control unit is in communication with the bioelectric signal acquisition unit, and the control unit is configured to: receiving the bioelectric signal from the bioelectric signal acquisition unit; and Based on the bioelectric signal, the supply voltage of at least one layer of artificial muscle is controlled to adjust the system focal length of the artificial lens.

3. The intraocular lens system according to claim 2, characterized in that: The control unit is further configured to: Based on the bioelectric signal, obtaining a first expected system focal length of the intraocular lens through a first data model, wherein the first data model is a corresponding relationship model between the bioelectric signal and the first expected system focal length; Based on the first desired system focal length of the intraocular lens, an optimal focal length adjustment scheme is obtained through a second data model, wherein the second data model is a corresponding relationship model between the first desired system focal length and the axial displacement of each lens; and Based on the optimal focal length adjustment scheme, the supply voltage of at least one layer of artificial muscle is controlled to adjust the system focal length of the artificial lens to the first desired system focal length.

4. The intraocular lens system according to claim 3, characterized in that: The optimal focal length adjustment scheme includes the identity data of the lens that needs to be moved axially and its axial displacement data, The control unit is configured to: Based on the identity data of the lens that needs to be axially moved in the optimal focal length adjustment scheme and its axial displacement data, an expected supply voltage of the artificial muscle connected to the corresponding lens is obtained through a third data model, wherein the third data model is a corresponding relationship model between the axial displacement of the lens and the expected supply voltage of the corresponding artificial muscle; and The desired supply voltage is applied to the corresponding artificial muscle to adjust the system focal length of the artificial lens to the first desired system focal length.

5. The intraocular lens system according to claim 2, characterized in that: At least some of the plurality of lenses are configured as liquid lenses, and the curvature of the lens surface of the liquid lens can be changed by adjusting an applied voltage. The control unit is further configured to: based on the bioelectric signal, control the supply voltage of at least one layer of artificial muscle and / or the applied voltage of at least one liquid lens to adjust the system focal length of the artificial lens.

6. The intraocular lens system according to claim 5, characterized in that: The control unit is further configured to: Based on the bioelectric signal, obtaining a second desired system focal length of the intraocular lens through a fourth data model, wherein the fourth data model is a corresponding relationship model between the bioelectric signal and the second desired system focal length; Based on the second desired system focal length of the intraocular lens, an optimal focal length adjustment scheme is obtained through a fifth data model, wherein the fifth data model is a correspondence relationship model between the second desired system focal length and the axial displacement of each lens and the lens surface curvature of each liquid lens; Based on the optimal focal length adjustment scheme, the supply voltage of at least one layer of artificial muscle and / or the applied voltage of at least one liquid lens are controlled to adjust the system focal length of the artificial lens to the second desired system focal length.

7. The intraocular lens system according to claim 6, characterized in that: The optimal focal length adjustment scheme includes the identity data of the lens that needs to be moved axially and its axial displacement data and / or the identity data of the liquid lens that needs to adjust the lens surface curvature and its lens surface curvature data, The control unit is further configured to: Based on the identity data of the lens that needs to be axially moved in the optimal focal length adjustment scheme and its axial displacement data, the expected supply voltage of the artificial muscle connected to the corresponding lens is obtained through a sixth data model, wherein the sixth data model is a corresponding relationship model between the axial displacement of the lens and the expected supply voltage of the corresponding artificial muscle; and applying the desired supply voltage to the corresponding artificial muscle; and / or Based on the identity data of the liquid lens whose lens surface curvature needs to be adjusted and its lens surface curvature data in the optimal focal length adjustment scheme, an expected applied voltage of the corresponding liquid lens is obtained through a seventh data model, wherein the seventh data model is a corresponding relationship model between the lens surface curvature of the liquid lens and the expected applied voltage; and The desired external voltage is applied to the corresponding liquid lens.

8. The intraocular lens system according to any one of claims 1 to 7, characterized in that: Also includes one or more of the following: The intraocular lens further comprises a wireless receiving coil arranged on the annular support, the wireless receiving coil being used to receive wireless induction power and supply power to components of the intraocular lens; The artificial muscle comprises a plurality of annular electrodes, which are arranged concentrically and spaced apart to control the bending deformation amplitude of the artificial muscle; Each lens is connected to at least one layer of artificial muscle.

9. The intraocular lens system according to claim 3 or 6, characterized in that: The control unit is further configured to: Divide the focal length of the system into several non-overlapping ranges and establish the corresponding relationship between each range and the corresponding sub-model in advance; When a corresponding expected system focal length is obtained based on the bioelectric signal, determining a range to which the corresponding expected system focal length belongs and a sub-model corresponding to the range; The optimal focus adjustment solution is selected from the corresponding sub-model.

10. A method for adjusting the focal length of an artificial lens system, characterized in that: The intraocular lens system is the intraocular lens system according to any one of claims 1 to 9, and the focus adjustment method comprises the following steps: When the human eye observes an object, the bioelectric signal generated by the contraction of the human ciliary muscle is collected; Based on the bioelectric signal, obtaining the system focal length of the artificial lens through a corresponding data model; Based on the system focal length of the intraocular lens, an optimal focal length adjustment scheme is obtained through a corresponding data model; Based on the optimal focus adjustment scheme, the supply voltage of at least one layer of artificial muscle and / or the applied voltage of at least one liquid lens are controlled.

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