Design method and device for intraocular lenses

Abstract

The embodiment of the application provides a design method and device of an intraocular lens, and belongs to the technical field of lens design. The method comprises the following steps: obtaining a curved surface design parameter of a to-be-designed lens, and generating an initial aspheric surface design function of the to-be-designed lens according to the curved surface design parameter; obtaining an optical power influence parameter and an optical flat area influence parameter corresponding to the to-be-designed lens; generating a function based on the optical power influence parameter, the optical flat area influence parameter and the curved surface design parameter to obtain an optical power distribution function; performing a sag modulation on the initial aspheric surface design function according to the optical power distribution function to obtain a target aspheric surface design function; and generating an intraocular lens based on the target aspheric surface design function. The embodiment of the application can improve the flexibility of the intraocular lens in different use scenarios.

Description

Technical Field

[0001] This application relates to the field of lens design technology, and in particular to a design method and apparatus for an artificial lens. Background Technology

[0002] An intraocular lens (IOL) is a special lens used to correct refractive errors in cataract patients after surgery, helping them recover their vision. Precise design of the IOL can better assist patients in their vision recovery process.

[0003] Currently, related technologies typically employ a single optical focus for intraocular lens design. While this approach avoids the loss of light energy, it can limit the patient's usage scenarios and reduce the flexibility of intraocular lenses in different application scenarios. Summary of the Invention

[0004] The main objective of this application is to propose a design method and apparatus for an intraocular lens that can improve the flexibility of the intraocular lens in different usage scenarios.

[0005] To achieve the above objectives, a first aspect of this application provides a method for designing an intraocular lens, the method comprising:

[0006] Obtain the surface design parameters of the lens to be designed, and generate the initial aspheric design function of the lens to be designed based on the surface design parameters;

[0007] Obtain the power influence parameters and optical flatness region influence parameters corresponding to the lens to be designed;

[0008] Based on the optical power influence parameters, the optical flat region influence parameters, and the surface design parameters, a function is generated to obtain the optical power distribution function;

[0009] The initial aspherical design function is subjected to vector height modulation based on the optical power distribution function to obtain the target aspherical design function.

[0010] Intraocular lens generation is performed based on the target aspheric design function.

[0011] In some embodiments, the step of generating the optical power distribution function based on the optical power influence parameters, the optical flat region influence parameters, and the surface design parameters includes:

[0012] The lens aperture sub-parameter is extracted from the surface design parameters, and the aperture adjustment factor and curvature adjustment factor are extracted from the optical flat region influence parameters.

[0013] The lens aperture sub-parameters are adjusted according to the aperture adjustment factor to obtain the adjusted aperture sub-parameters.

[0014] The photopower suppression function of the lens to be designed is generated based on the adjusted aperture sub-parameters and the curvature adjustment factor.

[0015] The optical power suppression function is updated based on the optical power influence parameters to obtain the optical power distribution function.

[0016] In some embodiments, updating the optical power suppression function based on the optical power influence parameters to obtain the optical power distribution function includes:

[0017] A first optical power influence factor and a second optical power influence factor are extracted from the optical power influence parameters, wherein the influence degree of the first optical power influence factor is higher than that of the second optical power influence factor;

[0018] The optical power suppression function is updated based on the second optical power influence factor to obtain the updated optical power suppression function.

[0019] The optical power distribution function is obtained by calculating the ratio between the first optical power influence factor and the updated optical power suppression function.

[0020] In some embodiments, extracting the aperture adjustment factor and curvature adjustment factor from the optically flat region influence parameters includes:

[0021] Obtain the optical correction requirements parameters of the target object;

[0022] The optical flat area influence parameters are adjusted according to the optical correction requirement parameters to obtain the adjusted optical flat area influence parameters.

[0023] The aperture adjustment factor and curvature adjustment factor are re-extracted from the adjusted optical flat region influence parameters.

[0024] In some embodiments, the step of generating the optical power distribution function based on the optical power influence parameters, the optical flat region influence parameters, and the surface design parameters includes:

[0025] The central optical power parameter of the lens to be designed is determined based on the optical power influence parameter, and the central optical power parameter is used to indicate the optical power parameter of the central region of the lens to be designed.

[0026] Obtain the range of optical power parameters corresponding to the candidate lens materials for the lens to be designed;

[0027] When the central optical power parameter is greater than the maximum value of the optical power parameter range, the optical power influence parameter is adjusted according to the optical power parameter range to obtain the adjusted optical power influence parameter.

[0028] Based on the adjusted optical power influence parameters, the optical flat region influence parameters, and the surface design parameters, the function is regenerated to obtain the optical power distribution function.

[0029] In some embodiments, the step of performing elevation modulation on the initial aspherical design function based on the optical power distribution function to obtain the target aspherical design function includes:

[0030] Obtain the material refractive index and medium refractive index of the lens to be designed;

[0031] The effective refractive index of the lens to be designed is obtained by calculating the difference between the refractive index of the material and the refractive index of the medium.

[0032] The initial aspherical design function is subjected to vector height modulation based on the optical power distribution function and the effective refractive index to obtain the target aspherical design function.

[0033] In some embodiments, generating the initial aspheric design function for the lens to be designed based on the surface design parameters includes:

[0034] Extract the lens aperture sub-parameter, lens cone parameter, and lens curvature radius sub-parameter from the surface design parameters;

[0035] The first surface variation quantization factor of the lens to be designed is determined based on the ratio of the lens curvature radius sub-parameter to the lens aperture sub-parameter.

[0036] The second surface variation quantization factor of the lens to be designed is determined based on the ratio of the square of the lens aperture sub-parameter to the lens curvature radius sub-parameter.

[0037] Based on the first surface change quantization factor and the lens cone parameters, a function is generated to obtain the aspherical curvature correction function;

[0038] The aspherical curvature correction function is updated based on the second surface change quantization factor to obtain the initial aspherical design function of the lens to be designed.

[0039] To achieve the above objectives, a second aspect of this application provides a design apparatus for an intraocular lens, the apparatus comprising:

[0040] The surface initialization module is used to obtain the surface design parameters of the lens to be designed, and generate the initial aspheric design function of the lens to be designed based on the surface design parameters;

[0041] The parameter acquisition module is used to acquire the optical power influence parameters and optical flat region influence parameters corresponding to the lens to be designed.

[0042] The function generation module is used to generate a function based on the optical power influence parameters, the optical flat region influence parameters, and the surface design parameters to obtain the optical power distribution function.

[0043] The elevation modulation module is used to perform elevation modulation on the initial aspherical design function according to the optical power distribution function to obtain the target aspherical design function.

[0044] The lens generation module is used to generate an artificial lens based on the target aspheric design function.

[0045] The method and apparatus for designing intraocular lenses (IOLs) proposed in this application involve obtaining the surface design parameters of the IOL to be designed and generating an initial aspheric design function based on these parameters. Further, it involves obtaining the power influence parameters and optical flatness region influence parameters corresponding to the IOL to be designed. Further, it involves generating a power distribution function based on the power influence parameters, optical flatness region influence parameters, and surface design parameters. Further, it involves performing height modulation on the initial aspheric design function based on the power distribution function to obtain a target aspheric design function. Finally, it involves generating an IOL based on the target aspheric design function.

[0046] This application considers the influence of optical power parameters, optical flat area parameters, and surface design parameters on the design of intraocular lenses. It modulates the optical power distribution function generated based on these parameters on the initial aspherical design function of the lens to be designed to optimize the optical power distribution of the optical surface of the lens to be designed. This allows the lens to dynamically adjust its optical properties according to different visual needs, thereby improving the flexibility of the designed intraocular lens in different scenarios. Attached Figure Description

[0047] Figure 1 This is a flowchart of the design method for an intraocular lens provided in the embodiments of this application;

[0048] Figure 2 yes Figure 1 The flowchart of step S101 in the text;

[0049] Figure 3 yes Figure 1 The flowchart of step S103 in the process;

[0050] Figure 4 yes Figure 3 The flowchart of step S301 in the process;

[0051] Figure 5 yes Figure 3 The flowchart of step S304 in the process;

[0052] Figure 6A This is a function mapping image of the first type of optical power distribution function provided in the embodiments of this application;

[0053] Figure 6B This is a function mapping image of the second type of optical power distribution function provided in the embodiments of this application;

[0054] Figure 6C This is a function mapping image of the third type of optical power distribution function provided in the embodiments of this application;

[0055] Figure 7 yes Figure 1 Another flowchart for step S103 in the process;

[0056] Figure 8A These are the basic optical properties of the lens provided in the embodiments of this application;

[0057] Figure 8B These are the optical properties of the aspherical zero-spherical-aridity lens provided in the embodiments of this application;

[0058] Figure 8C This is a schematic diagram illustrating the principle of adjusting the incident angle of the lens according to an embodiment of this application;

[0059] Figure 8D This is a schematic diagram illustrating the principle of lens height modulation provided in the embodiments of this application;

[0060] Figure 9 yes Figure 1 The flowchart of step S104 in the process;

[0061] Figure 10A Images showing the surface sag variation of a lens with a zero-aberration aspherical design in an unmodulated state;

[0062] Figure 10B Images showing the changes in optical power distribution of a lens with a zero-aberration aspherical design in an unmodulated state;

[0063] Figure 10C The image shows the defocus curve change of a lens with a zero-aberration aspherical design in an unmodulated state;

[0064] Figure 11AThe image shows the surface sagittal variation of the first zero-aberration aspherical lens under modulation.

[0065] Figure 11B The image shows the change in optical power distribution of the first zero-aberration aspherical lens under modulation.

[0066] Figure 11C The image shows the defocus curve change corresponding to the optical half-aperture of the lens under modulation state, which is the first lens with zero spherical aberration aspherical design.

[0067] Figure 11D The image shows the defocus curve change corresponding to another crystalline optical half-aperture of the first zero-aberration aspherical lens design under modulation.

[0068] Figure 12A The image shows the surface sag variation of the lens with the second type of zero-aberration aspherical design under modulation.

[0069] Figure 12B The image shows the change in optical power distribution of the second type of zero-aberration aspherical lens under modulation.

[0070] Figure 12C The image shows the defocus curve change corresponding to the optical half-aperture of a lens with the second type of zero-aberration aspherical design in a modulated state.

[0071] Figure 12D The image shows the defocus curve change corresponding to another crystalline optical half-aperture of the second type of lens with zero spherical aberration aspherical design under modulation state;

[0072] Figure 13A The image shows the surface sag variation of a lens with a zero aberration aspherical design under modulation.

[0073] Figure 13B The image shows the change in optical power distribution of the third type of zero-aberration aspherical lens under modulation.

[0074] Figure 13C The image shows the defocus curve change corresponding to the optical half-aperture of a lens with a third type of zero-aberration aspherical design under modulation.

[0075] Figure 13D The image shows the defocus curve change of another crystalline optical half-aperture corresponding to the third type of zero-aberration aspherical lens design in the modulation state;

[0076] Figure 14 This is a schematic diagram of the design device for an intraocular lens provided in an embodiment of this application; Detailed Implementation

[0077] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0078] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0079] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0080] First, let's analyze some of the terms used in this application:

[0081] An intraocular lens (IOL) is a single-piece optical lens consisting of an optical zone and a support haptic. It is used to correct refractive errors in cataract patients after surgery. The optical zone is responsible for focusing light, while the support haptic ensures that the lens is fixed in the correct position within the eye.

[0082] Depth of focus: This term is used to characterize the range of acceptable sharp images formed in front of and behind the retina after light passes through an artificial lens.

[0083] With the improvement of living standards, cataract patients have higher requirements for postoperative vision recovery, needing not only clear distance vision but also good intermediate and near vision to meet diverse daily needs. Therefore, it is necessary to accurately design intraocular lenses to improve their flexibility in different usage scenarios, thereby achieving precise vision correction in multi-distance scenarios.

[0084] Currently, related technologies typically employ single-optical-focal-focus intraocular lens (IOL) design. While this approach avoids light energy loss, it limits its application to vision correction at a single distance (e.g., long distance), reducing the flexibility of IOLs in various usage scenarios. Other technologies utilize multi-optical-focal-focus IOLs, such as diffractive multifocal IOLs, regional refractive multifocal IOLs, or extended depth-of-focus IOLs. While this approach enables vision correction at multiple distances, the need to distribute light energy among multiple optical focal points reduces light energy utilization. Furthermore, unused light energy can cause postoperative halos, glare, and other adverse optical phenomena, increasing the difficulty of patient adaptation and further reducing the flexibility of IOLs in different usage scenarios.

[0085] Based on this, embodiments of this application provide a design method and apparatus for an intraocular lens, which can improve the flexibility of the intraocular lens in different usage scenarios.

[0086] The intraocular lens design method provided in this application relates to the field of lens design technology. The intraocular lens design method provided in this application can be applied to a terminal, a server, or software running on either a terminal or a server. In some embodiments, the terminal can be a smartphone, tablet, laptop, desktop computer, etc.; the server can be configured as an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms; the software can be an application implementing the intraocular lens design method, but is not limited to the above forms.

[0087] Figure 1 This is an optional flowchart of the intraocular lens design method provided in the embodiments of this application. Figure 1 The method may include, but is not limited to, steps S101 to S105.

[0088] Step S101: Obtain the surface design parameters of the lens to be designed, and generate the initial aspheric design function of the lens to be designed based on the surface design parameters;

[0089] Step S102: Obtain the optical power influence parameters and optical flatness region influence parameters corresponding to the lens to be designed;

[0090] Step S103: Based on the optical power influence parameters, optical flat region influence parameters, and surface design parameters, a function is generated to obtain the optical power distribution function;

[0091] Step S104: The initial aspherical design function is subjected to vector height modulation based on the optical power distribution function to obtain the target aspherical design function;

[0092] Step S105: Generate an artificial lens based on the target aspheric design function.

[0093] In step S101 of some embodiments, the lens to be designed is an intraocular lens that needs to be designed. For example, a zero-aberration aspheric intraocular lens or a monofocal intraocular lens. The surface design parameters are a set of data characterizing the surface geometry of the lens to be designed. The initial aspheric design function is a mathematical function generated based on the surface design parameters, used to characterize the sag distribution characteristics of the surface of the lens to be designed.

[0094] Please see Figure 2 In some embodiments, step S101 may include, but is not limited to, steps S201 to S205:

[0095] Step S201: Extract the lens aperture sub-parameter, lens cone parameter, and lens curvature radius sub-parameter from the surface design parameters;

[0096] Step S202: Determine the first surface variation quantization factor of the lens to be designed based on the ratio of the lens curvature radius sub-parameter to the lens aperture sub-parameter.

[0097] Step S203: Determine the second surface variation quantization factor of the lens to be designed based on the ratio of the square of the lens aperture sub-parameter to the lens curvature radius sub-parameter.

[0098] Step S204: Based on the first surface change quantization factor and the lens cone parameters, a function is generated to obtain the aspherical curvature correction function;

[0099] Step S205: Update the aspheric curvature correction function based on the second surface change quantization factor to obtain the initial aspheric design function of the lens to be designed.

[0100] In step S201 of some embodiments, the lens aperture sub-parameter is the effective radius of the optical region of the lens to be designed, used to determine the maximum radial range of incident light rays passing through the lens to be designed. The lens conic sub-parameter characterizes the degree to which the surface of the lens to be designed deviates from a standard sphere. The lens radius of curvature sub-parameter is the radius of curvature at the vertex of the surface of the lens to be designed, used to characterize the degree of surface curvature of the lens to be designed.

[0101] In step S202 of some embodiments, the first surface change quantification factor characterizes the proportional relationship between the lens curvature radius sub-parameter and the lens aperture sub-parameter, and is used to quantify the degree of curvature gradient change of the lens surface to be designed in the radial direction.

[0102] In step S203 of some embodiments, the second surface change quantification factor characterizes the proportional relationship between the square of the semi-aperture of the lens optical region and the vertex curvature radius, and is used to quantify the degree of curvature change in the edge region of the lens surface to be designed.

[0103] In step S204 of some embodiments, the aspherical curvature correction function is a mathematical function generated based on the first surface change quantization factor and the lens cone parameters, used to nonlinearly correct the curvature of the standard sphere, thereby optimizing the aberration compensation effect between the central and edge regions of the optical zone.

[0104] In step S205 of some embodiments, the initial aspherical design function is a mathematical function obtained by updating the aspherical curvature correction function through the second surface change quantization factor. It is used to characterize the sag distribution characteristics of the lens surface to be designed, and the functional expression of the initial aspherical design function is shown in the following formula (1):

[0105]

[0106] Where R is the radius of curvature at the vertex of the surface (i.e., the lens radius of curvature sub-parameter), Q is the conic constant (i.e., the lens conic sub-parameter), x is the optical half-aperture of the lens (i.e., the lens aperture sub-parameter), 1 / R×x is the quantization factor for the first surface variation, and 1 / R×x 2 This is the quantization factor for the change of the second surface. Z′(x) is the aspherical curvature correction function, and Z′(x) is the surface elevation value corresponding to the crystal optical half-aperture calculated based on the initial aspherical design function.

[0107] It should be noted that the surface sag value refers to the vertical distance from any point on the surface of the lens to be designed to the reference plane. The reference plane is a reference plane that passes through the optical center point of the lens to be designed and is perpendicular to the optical axis. Sag modulation indicates that the surface sag value at each point on the surface of the lens to be designed is adjusted. By modulating the surface sag value, the optical performance of the lens to be designed can be further optimized.

[0108] In step S102 of some embodiments, the optical power influence parameter is used to characterize the parameters affecting the central optical power parameter of the lens to be designed. The optical flatness region influence parameter is used to characterize the parameters affecting the range of the central flatness region and the change in the slope of the surface of the lens to be designed.

[0109] It should be noted that the central optical power parameter characterizes the optical power of the central region of the lens to be designed, and is used to determine the principal focal point of the lens. When the central optical power parameter increases, the principal focal point will be closer to the lens, making it more suitable for near vision correction. When the central optical power parameter decreases, the principal focal point will be farther away from the lens, making it more suitable for distance vision correction. Therefore, by dynamically adjusting the central optical power parameter, the intraocular lens to be designed can be adapted to the needs of different visual distances, thereby improving the flexibility of the intraocular lens in different scenarios.

[0110] It should be noted that the central flat area represents the region where the optical power of the lens to be designed changes smoothly, and is used to determine the depth of focus of the lens to be designed. When the central flat area increases, a greater depth of focus is formed, allowing light to focus over a longer range in front of and behind the retina. Therefore, by dynamically adjusting the central flat area, the intraocular lens to be designed can achieve an adjustable depth of focus range, thereby providing patients with continuous visual correction from far to near.

[0111] In step S103 of some embodiments, the optical power distribution function is a mathematical function generated based on the optical power influence parameter, the optical flat region influence parameter, and the surface design parameter, used to characterize the optical power distribution characteristics on the surface of the lens to be designed.

[0112] Please see Figure 3 In some embodiments, step S103 may include, but is not limited to, steps S301 to S304:

[0113] Step S301: Extract the lens aperture sub-parameter from the surface design parameters, and extract the aperture adjustment factor and curvature adjustment factor from the optical flat region influence parameters;

[0114] Step S302: Adjust the lens aperture sub-parameters according to the aperture adjustment factor to obtain the adjusted aperture sub-parameters;

[0115] Step S303: Generate the optical power suppression function of the lens to be designed based on the adjusted aperture sub-parameters and curvature adjustment factor;

[0116] Step S304: Update the optical power suppression function according to the optical power influence parameters to obtain the optical power distribution function.

[0117] In step S301 of some embodiments, the aperture adjustment factor is a non-zero real number used to adjust the effective radius of the optical region of the lens to be designed. The curvature adjustment factor is a non-zero integer used to adjust the rate of curvature change of the optical power distribution of the lens to be designed.

[0118] In step S302 of some embodiments, the adjusted aperture sub-parameter is determined by multiplying the lens aperture sub-parameter by the aperture adjustment factor, and is used to achieve linear control of the range of the central flat region of the lens to be designed. For example, when the adjusted aperture sub-parameter increases, the starting point of the attenuation of optical power in the edge region of the lens to be designed moves towards the center, thereby reducing the range of the central flat region.

[0119] In step S303 of some embodiments, the optical power suppression function is a mathematical function generated by exponentiation of the adjusted aperture sub-parameters based on the curvature adjustment factor. It is used to limit the amplitude of optical power variation in the edge region of the lens to be designed, thereby optimizing the smooth transition characteristics of the optical power distribution and avoiding the diffraction effect caused by abrupt changes in optical power in the edge region of the lens to be designed.

[0120] In step S304 of some embodiments, the present application embodiments determine the optical power distribution function by updating the optical power suppression function through the optical power influence parameter, so that the optical power distribution function obtains more uniform optical power distribution characteristics, suppresses the generation of undesirable optical phenomena such as halos and glare, thereby improving the light energy utilization rate of the lens to be designed.

[0121] Please see Figure 4 In some embodiments, step S301 may include, but is not limited to, steps S401 to S403:

[0122] Step S401: Obtain the optical correction requirement parameters of the target object;

[0123] Step S402: Adjust the parameters of the influence of the optical flat area according to the optical correction requirement parameters to obtain the adjusted parameters of the influence of the optical flat area.

[0124] Step S403: Extract the aperture adjustment factor and curvature adjustment factor again from the adjusted optical flat region influence parameters.

[0125] In step S401 of some embodiments, the target object is an individual who needs to have an artificial lens implanted. For example, a cataract surgery patient or someone requiring presbyopia correction. Optical correction requirement parameters are a set of data characterizing the visual correction effect the target object expects to achieve. For example, the range of viewing distances the target object expects to correct, the depth of focus the target object expects to obtain, etc.

[0126] In step S402 of some embodiments, the adjusted optical flat area influence parameter is a data set obtained by adjusting the optical flat area influence parameter using the optical correction requirement parameter. When the target object requires a greater depth of focus, the adjusted optical flat area influence parameter can be obtained by increasing the optical flat area range parameter; or, when the target object needs to improve central vision, the adjusted optical flat area influence parameter can be obtained by decreasing the optical flat area range parameter. For example, when a patient needs to simultaneously meet intermediate and far-distance visual requirements of 20m to 50m, the maximum value of the optical flat area range parameter, 3 mm, can be increased to 5 mm to obtain a greater depth of focus to meet the visual acuity requirements at intermediate and far distances.

[0127] In step S403 of some embodiments, the present application embodiments re-extract the aperture adjustment factor and curvature adjustment factor from the adjusted optical flat region influence parameters, so that the optical characteristics of the lens to be designed can accurately match the visual needs of the target object, thereby optimizing visual quality and improving the user experience of the target object.

[0128] Please see Figure 5 In some embodiments, step S304 may include, but is not limited to, steps S501 to S503:

[0129] Step S501: Extract the first optical power influence factor and the second optical power influence factor from the optical power influence parameters;

[0130] Step S502: Update the optical power suppression function according to the second optical power influence factor to obtain the updated optical power suppression function;

[0131] Step S503: Calculate the ratio between the first optical power influence factor and the updated optical power suppression function to obtain the optical power distribution function.

[0132] In step S501 of some embodiments, the first optical power influence factor is the primary controlling factor for determining the central optical power parameter of the lens to be designed. The second optical power influence factor is an auxiliary factor for determining the central optical power parameter of the lens to be designed. The influence of the first optical power influence factor is greater than that of the second optical power influence factor.

[0133] In step S502 of some embodiments, the updated optical power suppression function is obtained by adding the optical power suppression function based on the second optical power influence factor. In this embodiment, the optical power suppression function is adjusted by the second optical power influence factor, thereby adjusting the amplitude of optical power variation without changing the function's curvature characteristics.

[0134] In step S503 of some embodiments, the optical power distribution function is obtained by calculating the ratio of the first optical power influence factor and the updated optical power suppression function, and the specific form of the optical power distribution function is shown in the following formula (2):

[0135]

[0136] Where x is the lens aperture sub-parameter, A is the first optical power influence factor, B is the second optical power influence factor, C is the aperture adjustment factor, N is the curvature adjustment factor, Cx is the adjusted aperture sub-parameter, and (Cx) 2N It is the optical power suppression function, B+(Cx). 2N This is the updated optical power suppression function, where ΔD(x) is the optical power distribution function. For example, A can be 2, 3, or 2.5; B can be 1, 2.1, or 0.5; C can be 1.45, 1, or 2.2; N can be ±1, ±2, ±3, etc., and A, B, C, and N can be freely set according to actual needs. When the effective radius of the optical zone of the lens to be designed is 3 mm, x can be any value between 0 and 3 mm.

[0137] This application embodiment determines the optical power distribution function of the lens to be designed by calculating the ratio of the updated optical power suppression function to the first optical power influence factor. This allows the first optical power influence factor to dominate the control of the central optical power parameter of the lens to be designed, simplifying the optimization process of the central optical power parameter of the intraocular lens and thus improving the efficiency of lens design. For example, related technologies require simultaneous adjustment of the conic constant and the radius of curvature of the surface vertex of the lens when accurately adjusting the central optical power parameter. However, this application embodiment can independently adjust the magnitude of the first optical power influence factor to change the magnitude of the central optical power parameter, thereby simplifying the optimization process of the central optical power parameter of the intraocular lens.

[0138] In some specific embodiments, in conjunction with formula (2), when A=2, B=1, C=1, N=1, the specific form of the corresponding optical power distribution function is shown in formula (3) below, and as follows: Figure 6A The image shown is a function mapping image of the first type of optical power distribution function obtained based on the current value:

[0139]

[0140] in, Figure 6AThe curve corresponds to the optical power distribution function for the current value. The horizontal axis represents the lens aperture sub-parameter x, and the vertical axis represents the optical power ΔD1(x) corresponding to the current value x. When the horizontal axis x is 0, the optical power at the corresponding point on the function curve is 2 diopters (Diopter, D), and the optical power at this point is the value of the central optical power parameter.

[0141] Depend on Figure 6A It can be seen that the central optical power parameter of the first optical power distribution function is 2D, and the central flat region is located between the two red dashed lines, with an abscissa ranging from -0.5 mm to 0.5 mm. The curvature change is relatively gentle, and the smooth attenuation characteristics of the edge region are small. Therefore, compared with the lens designed based on the initial aspherical design function, the intraocular lens designed based on the target aspherical design function generated by combining the initial aspherical design function and the first optical power distribution function can improve the visual acuity of the central region of the lens under design, while reducing aberrations in the central region.

[0142] In some specific embodiments, in conjunction with formula (2), when A=2, B=1, C=1, N=2, the specific manifestation of the corresponding optical power distribution function is shown in formula (4) below, and as follows: Figure 6B The image shown is a function mapping image of the second type of optical power distribution function obtained based on the current value:

[0143]

[0144] Depend on Figure 6B It can be seen that the central optical power parameter of the second optical power distribution function is 2D, and the central flat region ranges from -1mm to 1mm between the two red dashed lines. The curvature changes rapidly, and the smooth attenuation characteristics of the edge region are relatively large. Therefore, compared with the lens designed based on the initial aspherical design function, the intraocular lens designed based on the target aspherical design function generated by combining the initial aspherical design function and the second optical power distribution function can provide a larger viewing distance range without changing the visual acuity of the central region of the lens to be designed. At the same time, it reduces the generation of adverse optical phenomena such as halos and glare, and improves the utilization rate of light energy.

[0145] In some specific embodiments, in conjunction with formula (2), when A = 2.5, B = 1, C = 2, N = 2, the specific manifestation of the corresponding optical power distribution function is shown in formula (5) below, and as follows: Figure 6C The image shown is a function mapping image of the second type of optical power distribution function obtained based on the current value:

[0146]

[0147] Depend on Figure 6CIt can be seen that the central optical power parameter of the third optical power distribution function is 2.5D, and the central flat region is located between the two red dashed lines, with an abscissa of -0.5mm to 0.5mm. The curvature changes very rapidly, and the smooth attenuation characteristics of the edge region are relatively large. Therefore, compared with the lens designed based on the initial aspherical design function, the intraocular lens designed based on the target aspherical design function generated by combining the initial aspherical design function and the third optical power distribution function can improve the visual acuity in the central region of the lens under design, while reducing the generation of adverse optical phenomena such as halos and glare, and improving the utilization rate of light energy.

[0148] Please see Figure 7 In some embodiments, step S103 may include, but is not limited to, steps S701 to S704:

[0149] Step S701: Determine the central optical power parameters of the lens to be designed based on the optical power influence parameters;

[0150] Step S702: Obtain the range of optical power parameters corresponding to the candidate lens materials for designing the lens to be designed;

[0151] Step S703: When the central optical power parameter is greater than the maximum value of the optical power parameter range, the optical power influence parameter is adjusted according to the optical power parameter range to obtain the adjusted optical power influence parameter.

[0152] Step S704: Based on the adjusted optical power influence parameters, optical flat region influence parameters, and surface design parameters, the function is regenerated to obtain the optical power distribution function.

[0153] In step S701 of some embodiments, the central optical power parameter is used to indicate the optical power parameter of the central region of the lens to be designed. The central optical power parameter can be determined by the ratio of a first optical power influence factor and a second optical power influence factor included in the optical power influence parameter.

[0154] In step S702 of some embodiments, the candidate lens material refers to the currently selected transparent material used to design the actual intraocular lens to meet the design requirements. The power parameter range is the effective power range that the candidate lens material can achieve while ensuring structural integrity and optical performance.

[0155] In step S703 of some embodiments, when the central optical power parameter is greater than the maximum value of the optical power parameter range, i.e., the central optical power parameter currently used in the simulated design of the lens cannot be applied to the candidate lens material, the optical power influence parameter can be adjusted to the optical power parameter range to obtain the adjusted optical power influence parameter, thereby improving design efficiency. When the central optical power parameter is less than or equal to the maximum value of the optical power parameter range, the optical power influence parameter is not adjusted, and the optical power influence parameter is the adjusted optical power influence parameter.

[0156] It should be noted that when the central optical power parameter is greater than the maximum value of the optical power parameter range, this application may also replace the candidate lens material to ensure the desired visual effect, without limitation.

[0157] In the above embodiments, the present application determines the adjustment method of the optical power parameter by the ratio of the central optical power parameter to the maximum value of the optical power parameter range. Under the premise of ensuring the structural integrity and optical performance of the lens, the optimized design of the lens to be designed can be realized to the greatest extent, and the flexibility of the artificial lens in different scenarios can be improved.

[0158] In step S704 of some embodiments, the present application embodiments regenerate the optical power distribution function by adjusting the optical power influence parameters, optical flat region influence parameters and curved surface design parameters, so that the optical power of the lens to be designed is always within the safe range achievable by the candidate lens material, avoiding the risk of structural failure due to parameter exceeding limits.

[0159] In step S104 of some embodiments, the target aspherical design function is obtained by converting the optical power distribution characteristics characterized by the optical power distribution function into corresponding vector height modulation parameters, and then modulating the vector height distribution of the initial aspherical design function according to the vector height modulation parameters. The calculation formula of the target aspherical design function is shown in the following formula (6):

[0160]

[0161] Where R is the radius of curvature at the vertex of the surface (i.e., the radius of curvature sub-parameter of the lens), Q is the conic constant (i.e., the conic sub-parameter of the lens), x is the optical half-aperture of the lens (i.e., the aperture sub-parameter of the lens), ΔSag(x) is the conversion of the optical power distribution characteristics characterized by the optical power distribution function into the corresponding sag modulation parameter, and Z(x) is the surface sag value after sag modulation of Z′(x).

[0162] To facilitate understanding, through Figures 8A to 8D The technical principles related to the embodiments of this application will be explained. Figure 8AThese are the basic optical properties of the lens provided in the embodiments of this application. They follow Snell's law, that is, when the refractive index n1 of the object-side medium and the refractive index n2 of the image-side medium are determined, the angle of refraction θ2 and the angle of incidence θ1 satisfy n1×sinθ1=n2×sinθ2. Figure 8A It can be seen that after the incident ray passes through the curved surface (marked as c) at an incident angle θ1, it is refracted to form a refracted ray with a refraction angle θ2. When the refraction angle θ2 changes with the incident angle θ1, the refracted rays at different aperture positions will intersect the optical axis at different focal positions (marked as F).

[0163] Figure 8B This refers to the optical properties of the aspherical zero-aberration lens provided in the embodiments of this application. This lens allows refracted light rays from different aperture positions to reconverge at the same point on the optical axis. Figure 8B It can be seen that a beam of incident light at an angle θ 11 After passing through the curved surface (marked as c), it is refracted to form a refraction angle θ. 21 The refracted ray, and another incident ray at an angle θ 12 After passing through the curved surface, the refraction forms a refraction angle θ. 22 All refracted rays converge at the same point on the optical axis.

[0164] Figure 8C This is a schematic diagram illustrating the principle of adjusting the incident angle of the lens according to an embodiment of this application. Figure 8C It can be seen that a set of parallel incident rays (incident rays labeled n, I, j, f, h) modulate the refraction angle of the refracted rays (refracted rays labeled p, m, k, g, i, here the refracted rays correspond to the previous incident rays in order) by controlling the incident angle of the rays passing through the curved surface (curved surface labeled c), so as to focus the optical fiber at a specific position on the optical axis (optical axis labeled q), thereby focusing the optical fiber at different apertures to a specific position, thus forming a continuous depth of focus.

[0165] Figure 8D This is a schematic diagram illustrating the principle of lens height modulation provided in an embodiment of this application. Figure 8D Assuming A and B are two very close points on the surface (approximately infinitesimal lim A→B=0), with an incident angle of θ, when point B is modulated by its height, it will experience a tiny displacement ΔSag, moving to position B'. At this point, the incident angle will change from θ to θ', thus controlling the angle of incidence. By adding a height modulation parameter ΔSag to the original surface, the incident angle and the focusing position of the light ray can be changed, i.e., the optical power corresponding to different crystal optical half-apertures can be altered, thereby modulating the depth of focus of the crystal.

[0166] In step S105 of some embodiments, the present application embodiments construct a digital three-dimensional model of the intraocular lens through a target aspheric design function, then convert the digital three-dimensional model into processing instructions of a precision processing equipment, and then directly generate the intraocular lens through the precision processing equipment.

[0167] Please see Figure 9 In some embodiments, step S104 may include, but is not limited to, steps S901 to S903:

[0168] Step S901: Obtain the refractive index of the material and the refractive index of the medium of the lens to be designed;

[0169] Step S902: Calculate the difference between the material refractive index and the medium refractive index to obtain the effective refractive index of the lens to be designed;

[0170] Step S903: The initial aspherical design function is subjected to vector height modulation based on the optical power distribution function and the effective refractive index to obtain the target aspherical design function.

[0171] In step S901 of some embodiments, the material refractive index refers to the refractive index parameter of the optical material constituting the lens to be designed for light. The medium refractive index refers to the refractive ability parameter of the environmental medium within the eye where the lens to be designed is located for light.

[0172] In step S902 of some embodiments, the effective refractive index is calculated by the difference between the refractive index of the material and the refractive index of the medium. For example, if the refractive index of the material of the lens to be designed is 1.460 and the refractive index of the medium is 1.336, then the effective refractive index calculated by the difference is 0.124.

[0173] In step S903 of some embodiments, the present application embodiments introduce an effective refractive index parameter and combine it with the optical power distribution function to perform sag modulation on the initial aspherical design function, so that the lens to be designed can adapt to different intraocular environments, thereby improving the flexibility of the artificial lens in different usage scenarios.

[0174] This application's embodiments utilize height modulation of the initial aspheric design function to design a continuous aspheric intraocular lens (IOL). This IOL maintains the distance vision performance of a monofocal IOL while providing a large depth of focus without light energy loss. Furthermore, this aspheric IOL also offers good intermediate vision and eliminates postoperative glare and halos, thereby improving patient postoperative adaptability and satisfaction.

[0175] It should be noted that when the specific form of the optical power distribution function is as shown in formula (7):

[0176]

[0177] The specific calculation formula for the target aspherical design function is as follows: Formula (8):

[0178]

[0179] Where Δn is the effective refractive index, x is the lens aperture sub-parameter, A is the first optical power influence factor, B is the second optical power influence factor, C is the aperture adjustment factor, and N is the curvature adjustment factor.

[0180] It should be noted that when the specific form of the optical power distribution function is as shown in formula (9):

[0181]

[0182] The specific calculation formula for the target aspherical design function is as follows: Formula (10):

[0183]

[0184] This application simplifies the process of generating an intraocular lens through the target aspheric design function by designing the height modulation parameter (i.e., ΔSag(x)) for height modulation of the initial aspheric design function as an even function.

[0185] The following three specific embodiments will illustrate the optical characteristics of a lens with zero aberration aspherical design after using the elevation modulation parameters of this application for elevation modulation. The basic parameters of the lens with zero aberration aspherical design are shown in Table 1 below:

[0186] Optical power Material refractive index medium refractive index Rf Rb Q CT 20D 1.460 1.336 12.356 -12.356 -2.499 1.026

[0187] Table 1

[0188] Where Rf represents the crystal optical half-aperture of the front surface of the optical region, Rb represents the crystal optical half-aperture of the rear surface of the optical region, Q is the conic constant, CT is the thickness of the apex of the optical region, and the optical power is 20 diopter (D).

[0189] When the elevation modulation parameter is 0, meaning no modulation is applied to the zero-aberration aspherical lens design, the optical characteristics of the zero-aberration aspherical lens design are as follows: Figure 10A , Figure 10B and Figure 10C As shown. Among them, Figure 10A Images showing the surface sag variation of a lens with a zero-aberration aspherical design in its unmodulated state are presented. Figure 10AAs can be seen, the sag curve exhibits the characteristics of a standard aspherical surface. The horizontal axis of the sag curve is the half-aperture, in millimeters (mm) (i.e., the half-aperture of crystal optics), and the vertical axis is the sag (i.e., the sag value of the curved surface), in mm. Figure 10B Images showing the changes in optical power distribution of a lens with a zero-aberration aspherical design in an unmodulated state are presented. Figure 10B As can be seen, the power profile curve shows that the optical power corresponding to different crystal optical half-apertures is 20D. The horizontal axis represents the crystal optical half-aperture, which is usually within the range of 3 mm, that is, a half-aperture of 1.5 mm on one side, and the vertical axis represents the optical power, in diopters (D). Figure 10C This image shows the defocus curve variation of a lens with a zero-spherical-aberration aspherical design in an unmodulated state. Figure 10C As can be seen, the horizontal axis represents the defocus distance (in millimeters), and the vertical axis represents the value of the Modulation Transfer Function (MTF). When the defocus distance is 3 mm (Defocus@3 mm), the MTF corresponding to the defocus distance between -0.3 mm and 0.3 mm remains at a high level between 0.8 and 1.0, forming a clear peak region.

[0190] For example, combining formula (2), when A = 3, B = 1, C = 1.53, and N = 3, the specific form of the corresponding optical power distribution function is shown in formula (11) below:

[0191]

[0192] Where x is the lens aperture sub-parameter, A is the first optical power influence factor, B is the second optical power influence factor, C is the aperture adjustment factor, and N is the curvature adjustment factor.

[0193] The height modulation parameter calculated from ΔD6(x) and the effective refractive index is denoted as ΔSag1. After modulating a zero-aberration aspherical lens with ΔSag1, the optical properties of the zero-aberration aspherical lens are as follows: Figure 11A , Figure 11B , Figure 11C and Figure 11D As shown. Among them, Figure 11A This image shows the surface sag variation of the first zero-aberration aspherical lens design under modulation. Figure 11A It can be seen that after the lens is modulated by the sagittal height, the sagittal height value corresponding to different optical half-apertures of the lens increases, thereby reducing aberration interference in the edge region. Figure 11B This image shows the optical power distribution variation of the first zero-aberration aspherical lens design under modulation conditions. Figure 11BIt can be seen that after the lens is modulated by its height, the optical power distribution of the lens shows an increasing trend in the central region and a decreasing trend in the peripheral region, thereby enhancing the ability to correct near vision. Figure 11C This image shows the defocus curve change corresponding to the optical half-aperture of the first zero-aberration aspherical lens under modulation. Figure 11D This image shows the defocus curve change corresponding to another crystalline optical half-aperture in a modulation state for the first type of lens with zero spherical aberration aspherical design. Figure 11C and Figure 11D It can be seen that after the lens is modulated by the sag, there is a good depth of focus at both 2.5mm and 3mm lens optical half-aperture.

[0194] For example, combining formula (2), when A = 2.5, B = 1, C = 1.2, and N = 3, the specific form of the corresponding optical power distribution function is shown in formula (12) below:

[0195]

[0196] The height modulation parameter calculated from ΔD7(x) and the effective refractive index is denoted as ΔSag2. After height modulation of a zero-aberration aspherical lens using ΔSag2, the optical properties of the zero-aberration aspherical lens are as follows: Figure 12A , Figure 12B , Figure 12C and Figure 12D As shown. Among them, Figure 12A This image shows the surface sag variation of the lens under modulation conditions using a second type of zero-aberration aspherical design. Figure 12A It can be seen that after the lens is modulated by the sag, the change of the sag curve is smoother, making the light focus more uniform, thereby further reducing the aberration interference in the edge area. Figure 12B This image shows the change in optical power distribution of a second type of zero-aberration aspherical lens under modulation. Figure 12B It can be seen that after the lens is modulated by its height, the optical power of the central region of the lens is further increased, which enhances the light focusing ability of the central region of the lens, thereby further enhancing the ability to correct near vision. Figure 12C This image shows the defocus curve change corresponding to the optical half-aperture of a lens with a second type of zero-spherical-aberration aspherical design under modulation. Figure 12D This image shows the defocus curve change corresponding to another crystalline optical half-aperture in a modulation state for a second type of zero-aberration aspherical lens design. Figure 12C and Figure 12DIt can be seen that after the lens is modulated by the sag, the depth of focus performance at 2.5mm and 3mm lens optical half-apertures is further improved, which not only maintains the clarity of distance vision, but also enhances the visual quality at intermediate and near distances.

[0197] For example, combining formula (2), when A = 2.8, B = 1, C = 1.8, and N = 3, the specific form of the corresponding optical power distribution function is shown in formula (13) below:

[0198]

[0199] The height modulation parameter calculated from ΔD8(x) and the effective refractive index is denoted as ΔSag3. After modulating a zero-aberration aspherical lens using ΔSag3, the optical properties of the zero-aberration aspherical lens are as follows: Figure 13A , Figure 13B , Figure 13C and Figure 13D As shown. Among them, Figure 13A This image shows the surface sag variation of a lens with a zero-aberration aspherical design under modulation. Figure 13A It can be seen that after the lens is modulated by the sagittal height, the sagittal height value shows an increasing trend, which makes the light more uniformly converge near the main focal point at different optical half-apertures of the lens, thereby improving the visual quality. Figure 13B This image shows the change in optical power distribution of a third type of zero-aberration aspherical lens under modulation. Figure 13B It can be seen that after the lens is modulated by sagittal height, the optical power of the lens edge area decreases significantly, which allows light to be focused more evenly in different areas of the lens, thus improving the patient's visual quality at different distances. Figure 13C This image shows the defocus curve change corresponding to the optical half-aperture of a lens with a third type of zero-aberration aspherical design under modulation. Figure 13D This image shows the defocus curve change corresponding to another crystalline optical half-aperture in a modulation state for a third type of zero-aberration aspherical lens design. Figure 13C and Figure 13D It can be seen that after the lens is modulated by the sag, the depth of focus performance is optimized to the maximum extent under the optical half aperture of 2.5mm and 3mm, so that the lens can achieve better focusing ability under different optical half apertures, and significantly improve the visual quality at different distances.

[0200] Please see Figure 14 This application also provides an apparatus for designing an intraocular lens, which can implement the above-described method for designing an intraocular lens. The apparatus includes:

[0201] The surface initialization module 1401 is used to obtain the surface design parameters of the lens to be designed, and generate the initial aspheric design function of the lens to be designed based on the surface design parameters;

[0202] The parameter acquisition module 1402 is used to acquire the optical power influence parameters and optical flat region influence parameters corresponding to the lens to be designed.

[0203] The function generation module 1403 is used to generate a function based on the optical power influence parameters, the optical flat region influence parameters and the surface design parameters to obtain the optical power distribution function.

[0204] The elevation modulation module 1404 is used to perform elevation modulation on the initial aspherical design function according to the optical power distribution function to obtain the target aspherical design function.

[0205] The lens generation module 1405 is used to generate an artificial lens based on a target aspheric surface design function.

[0206] The specific implementation of the design device for the intraocular lens is basically the same as the specific implementation of the design method for the intraocular lens described above, and will not be repeated here.

[0207] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0208] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0209] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0210] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or appropriate combinations thereof.

[0211] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0212] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0213] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0214] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0215] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0216] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A method for designing an intraocular lens, characterized in that, The method includes: Obtain the surface design parameters of the lens to be designed, and generate the initial aspheric design function of the lens to be designed based on the surface design parameters; Obtain the power influence parameters and optical flatness region influence parameters corresponding to the lens to be designed; The central optical power parameter of the lens to be designed is determined based on the optical power influence parameter, and the central optical power parameter is used to indicate the optical power parameter of the central region of the lens to be designed. Obtain the range of optical power parameters corresponding to the candidate lens materials for the lens to be designed; When the central optical power parameter is less than or equal to the maximum value of the optical power parameter range, a function is generated based on the optical power influence parameter, the optical flat region influence parameter, and the surface design parameter to obtain the optical power distribution function; When the central optical power parameter is greater than the maximum value of the optical power parameter range, the optical power influence parameter is adjusted according to the optical power parameter range to obtain the adjusted optical power influence parameter; based on the adjusted optical power influence parameter, the optical flat area influence parameter and the surface design parameter, the function is regenerated to obtain the optical power distribution function; The step of generating the optical power distribution function based on the optical power influence parameters, the optical flat region influence parameters, and the surface design parameters includes: The lens aperture sub-parameter is extracted from the surface design parameters, and the aperture adjustment factor and curvature adjustment factor are extracted from the optical flat region influence parameters. The lens aperture sub-parameters are adjusted according to the aperture adjustment factor to obtain the adjusted aperture sub-parameters. The photopower suppression function of the lens to be designed is generated based on the adjusted aperture sub-parameters and the curvature adjustment factor. A first optical power influence factor and a second optical power influence factor are extracted from the optical power influence parameters, wherein the influence degree of the first optical power influence factor is higher than that of the second optical power influence factor; The optical power suppression function is updated based on the second optical power influence factor to obtain the updated optical power suppression function. The optical power distribution function is obtained by calculating the ratio between the first optical power influence factor and the updated optical power suppression function. The initial aspherical design function is subjected to vector height modulation based on the optical power distribution function to obtain the target aspherical design function. Intraocular lens generation is performed based on the target aspheric design function.

2. The method according to claim 1, characterized in that, The extraction of aperture adjustment factor and curvature adjustment factor from the influence parameters of the optically flat region includes: Obtain the optical correction requirements parameters of the target object; The optical flat area influence parameters are adjusted according to the optical correction requirement parameters to obtain the adjusted optical flat area influence parameters. The aperture adjustment factor and curvature adjustment factor are re-extracted from the adjusted optical flat region influence parameters.

3. The method according to claim 1, characterized in that, The step of performing height modulation on the initial aspherical design function based on the optical power distribution function to obtain the target aspherical design function includes: Obtain the material refractive index and medium refractive index of the lens to be designed; The effective refractive index of the lens to be designed is obtained by calculating the difference between the refractive index of the material and the refractive index of the medium. The initial aspherical design function is subjected to vector height modulation based on the optical power distribution function and the effective refractive index to obtain the target aspherical design function.

4. The method according to claim 1, characterized in that, The step of generating the initial aspheric design function for the lens to be designed based on the surface design parameters includes: Extract the lens aperture sub-parameter, lens cone parameter, and lens curvature radius sub-parameter from the surface design parameters; The first surface variation quantization factor of the lens to be designed is determined based on the ratio of the lens curvature radius sub-parameter to the lens aperture sub-parameter. The second surface variation quantization factor of the lens to be designed is determined based on the ratio of the square of the lens aperture sub-parameter to the lens curvature radius sub-parameter. Based on the first surface change quantization factor and the lens cone parameters, a function is generated to obtain the aspherical curvature correction function; The aspherical curvature correction function is updated based on the second surface change quantization factor to obtain the initial aspherical design function of the lens to be designed.

5. A design device for an intraocular lens, characterized in that, The device includes: The surface initialization module is used to obtain the surface design parameters of the lens to be designed, and generate the initial aspheric design function of the lens to be designed based on the surface design parameters; The parameter acquisition module is used to acquire the optical power influence parameters and optical flat region influence parameters corresponding to the lens to be designed. The function generation module is used to determine the central optical power parameter of the lens to be designed based on the optical power influence parameter, wherein the central optical power parameter indicates the optical power parameter of the central region of the lens to be designed; obtain the optical power parameter range corresponding to the candidate lens materials for designing the lens to be designed; when the central optical power parameter is less than or equal to the maximum value of the optical power parameter range, perform function generation based on the optical power influence parameter, the optical flat region influence parameter, and the curved surface design parameter to obtain an optical power distribution function; when the central optical power parameter is greater than the maximum value of the optical power parameter range, adjust the optical power influence parameter according to the optical power parameter range to obtain the adjusted optical power influence parameter; and regenerate the function based on the adjusted optical power influence parameter, the optical flat region influence parameter, and the curved surface design parameter to obtain the optical power distribution function. The step of generating the optical power distribution function based on the optical power influence parameters, the optical flat region influence parameters, and the surface design parameters includes: The lens aperture sub-parameter is extracted from the surface design parameters, and the aperture adjustment factor and curvature adjustment factor are extracted from the optical flat region influence parameters. The lens aperture sub-parameters are adjusted according to the aperture adjustment factor to obtain the adjusted aperture sub-parameters. The photopower suppression function of the lens to be designed is generated based on the adjusted aperture sub-parameters and the curvature adjustment factor. A first optical power influence factor and a second optical power influence factor are extracted from the optical power influence parameters, wherein the influence degree of the first optical power influence factor is higher than that of the second optical power influence factor; The optical power suppression function is updated based on the second optical power influence factor to obtain the updated optical power suppression function. The optical power distribution function is obtained by calculating the ratio between the first optical power influence factor and the updated optical power suppression function. The elevation modulation module is used to perform elevation modulation on the initial aspherical design function according to the optical power distribution function to obtain the target aspherical design function. The lens generation module is used to generate an artificial lens based on the target aspheric design function.

Images