Microstructure lens evaluation method and lens

Abstract

The invention discloses a micro-structure lens evaluation method and a lens, and belongs to the field of ophthalmic optics. The method comprises the following steps: acquiring optical parameters of a microstructure lens and optical parameters of a reference lens, wherein the optical parameters comprise structural parameters and microstructure surface types; based on the structure parameters of the microstructure lens, the structure parameters of the reference lens, the first defocused spot size and the second defocused spot size, the evaluation coefficient of the microstructure lens is determined, the evaluation coefficient is used for representing the microstructure stimulation intensity of the microstructure lens, the first defocused spot size is the defocused spot size corresponding to the microstructure surface type of the microstructure lens, and the second defocused spot size is the defocused spot size corresponding to the microstructure surface type of the microstructure lens. The second defocused spot size is the defocused spot size corresponding to the microstructure surface type of the reference lens. According to the application, the evaluation coefficient of the microstructure lens is determined based on the optical parameters and the defocused spot size of the microstructure lens and the reference lens, so that the microstructure stimulation intensity of the lens can be directly represented through the evaluation coefficient, and the simplicity and convenience of verifying the microstructure stimulation intensity are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ophthalmic optics, in particular to an evaluation method of a microstructure lens and the lens. BACKGROUND

[0002] The microstructure lens is a popular frame lens for correcting ametropia on the market at present, which provides clear vision in the central area of the retina and adds different stimulation signals in the peripheral retina from the center to achieve the effect of slowing down the growth of the eye axis and controlling the progression of myopia.

[0003] In order to deeply understand the optical performance of the microstructure lens, it is crucial to verify the microstructure strength of the lens. However, the existing microstructure stimulation strength of the lens needs to be verified through a time-consuming clinical test, and the verification process is relatively cumbersome. SUMMARY

[0004] The evaluation method of the microstructure lens and the lens provided by the embodiments of the present application can directly represent the microstructure stimulation strength of the lens, and improve the convenience of verifying the microstructure stimulation strength.

[0005] In a first aspect, the embodiments of the present application provide an evaluation method of a microstructure lens, which comprises:

[0006] Obtaining optical parameters of the microstructure lens and optical parameters of a reference lens, the optical parameters comprising structure parameters and a microstructure surface type;

[0007] Determining an evaluation coefficient of the microstructure lens based on the structure parameters of the microstructure lens, the structure parameters of the reference lens, a first diffraction spot size and a second diffraction spot size, the evaluation coefficient being used to represent the microstructure stimulation strength of the microstructure lens, the first diffraction spot size being a diffraction spot size corresponding to the microstructure surface type of the microstructure lens, and the second diffraction spot size being a diffraction spot size corresponding to the microstructure surface type of the reference lens.

[0008] In some embodiments, determining the evaluation coefficient of the microstructure lens based on the structure parameters of the microstructure lens, the structure parameters of the reference lens, the first diffraction spot size and the second diffraction spot size comprises:

[0009] Obtaining a lens evaluation model;

[0010] Inputting the structure parameters of the microstructure lens, the structure parameters of the reference lens, the first diffraction spot size and the second diffraction spot size into the lens evaluation model to determine the evaluation coefficient of the microstructure lens.

[0011] In some embodiments, obtaining the lens evaluation model comprises:

[0012] Determining the relationship between the structure parameters and the diffraction spot size;

[0013] The lens evaluation model is determined based on the target diffusion spot size corresponding to the target structure parameter, the second diffusion spot size, and the size increase rate, the target structure parameter being determined based on a structure parameter of the microstructure lens and a structure parameter of the reference lens, and the size increase rate being determined based on the first diffusion spot size and the second diffusion spot size.

[0014] In some embodiments, the relationship between the structure parameter and the diffusion spot size is determined by:

[0015] The structure parameter is taken as a single variable, and the diffusion spot size corresponding to each different value of the structure parameter is determined through simulation.

[0016] The relationship between the structure parameter and the diffusion spot size is determined by a regression analysis method based on different values of the structure parameter and the diffusion spot size corresponding to each different value of the structure parameter.

[0017] In some embodiments, the structure parameter includes a microstructure maximum sag, a microstructure filling rate, a lens optical zone diameter, and a microstructure diameter.

[0018] The relationship between the structure parameter and the diffusion spot size includes a first relationship between the microstructure maximum sag and the diffusion spot size, a second relationship between the microstructure filling rate and the diffusion spot size, a third relationship between the lens optical zone diameter and the diffusion spot size, and a fourth relationship between the microstructure diameter and the diffusion spot size.

[0019] In some embodiments, the lens evaluation model is determined based on the target diffusion spot size corresponding to the target structure parameter, the second diffusion spot size, and the size increase rate, including:

[0020] The lens evaluation model is determined by the following formula:

[0021] DPME = [f(ΔH) + f(ΔF) + f(ΔD0) + f(ΔD1) + R0](1 + k);

[0022] wherein,

[0023] In the formula, DPME represents the lens evaluation model, f(ΔH) represents the first target diffusion spot size, f(ΔF) represents the second target diffusion spot size, f(ΔD0) represents the third target diffusion spot size, f(ΔD1) represents the fourth target diffusion spot size, R0 represents the second diffusion spot size, k represents the size increase rate, the first target structure parameter is determined based on the microstructure maximum sag H of the microstructure lens and the microstructure maximum sag H0 of the reference lens through the first relationship, the second target structure parameter is determined based on the microstructure filling rate F of the microstructure lens and the microstructure filling rate F0 of the reference lens through the second relationship, the third target structure parameter is determined based on the lens optical zone diameter D0 of the microstructure lens and the lens optical zone diameter D0 of the reference lens through the third relationship, and the fourth target structure parameter is determined based on the microstructure diameter D of the microstructure lens and the microstructure diameter D0 of the reference lens through the fourth relationship.00 The fourth target structure parameter is determined through a third relationship determination, and is based on a microstructure diameter D1 of the microstructure lens and a microstructure diameter D of the reference lens 10 The fourth target structure parameter is determined through a fourth relationship determination.

[0024] In some embodiments, the first relationship and the fourth relationship satisfy a nonlinear relationship.

[0025] The second relationship and the third relationship satisfy a linear relationship.

[0026] In some embodiments, the first and second spot sizes are characterized by a root mean square radius of the spot.

[0027] In some embodiments, the first and second spot sizes are determined by the following steps:

[0028] With the microstructure surface type as a single variable, the different types of microstructure surface types respectively correspond to spot sizes determined through simulation;

[0029] The first and second spot sizes are determined from the different types of microstructure surface types respectively corresponding to the spot sizes.

[0030] In a second aspect, the embodiments of the present application also provide a lens obtained by the evaluation method of the microstructure lens as described above.

[0031] Beneficial effects: The embodiments of the present application provide an evaluation method of a microstructure lens, which comprises: obtaining optical parameters of a microstructure lens and optical parameters of a reference lens, the optical parameters comprising structure parameters and a microstructure surface type; determining an evaluation coefficient of the microstructure lens based on the structure parameters of the microstructure lens, the structure parameters of the reference lens, a first spot size and a second spot size, the evaluation coefficient being used to characterize a microstructure stimulation intensity of the microstructure lens, the first spot size being a spot size corresponding to the microstructure surface type of the microstructure lens, and the second spot size being a spot size corresponding to the microstructure surface type of the reference lens. The embodiments of the present application determine the evaluation coefficient of the microstructure lens based on the optical parameters of the microstructure lens and the reference lens and the spot sizes, and then the microstructure stimulation intensity of the lens can be directly characterized through the evaluation coefficient, thereby improving the convenience of verifying the microstructure stimulation intensity. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0033] Figure 1A flowchart of an evaluation method of a microstructure lens according to an embodiment of the present application is shown in FIG. 1.

[0034] Figure 2 A schematic diagram of a microstructure covering a microstructure region on a lens surface according to an embodiment of the present application is shown in FIG. 2.

[0035] Figure 3 A schematic diagram of a foveal angle and a visual field angle according to an embodiment of the present application is shown in FIG. 3.

[0036] Figure 4 A schematic diagram of a myopic eye system light path according to an embodiment of the present application is shown in FIG. 4.

[0037] Figure 5 A schematic diagram of a microstructure arrangement of a lens with different maximum sag of microstructure according to an embodiment of the present application is shown in FIG. 5.

[0038] Figure 6 A schematic diagram of a microstructure arrangement of a lens with different filling rate of microstructure according to an embodiment of the present application is shown in FIG. 6.

[0039] Figure 7 A schematic diagram of a microstructure arrangement of a lens with different optical zone diameter of microstructure according to an embodiment of the present application is shown in FIG. 7.

[0040] Figure 8 A schematic diagram of a microstructure arrangement of a lens with different microstructure diameter according to an embodiment of the present application is shown in FIG. 8.

[0041] Figure 9 A schematic diagram of a lens with different microstructure surface according to an embodiment of the present application is shown in FIG. 9.

[0042] Figure 10 A schematic diagram of a relationship between a maximum sag of microstructure and a RMS radius according to an embodiment of the present application is shown in FIG. 10.

[0043] Figure 11 A schematic diagram of a relationship between a filling rate of microstructure and a RMS radius according to an embodiment of the present application is shown in FIG. 11.

[0044] Figure 12 A schematic diagram of a relationship between an optical zone diameter of a lens and a RMS radius according to an embodiment of the present application is shown in FIG. 12.

[0045] Figure 13 A schematic diagram of a relationship between a microstructure diameter and a RMS radius according to an embodiment of the present application is shown in FIG. 13. DETAILED DESCRIPTION

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] Microstructured lenses are currently a popular type of eyeglass lens for correcting refractive errors. While providing clear vision in the central retina, they introduce different stimuli into the peripheral retina to slow axial elongation and control myopia progression. The microstructure of a microstructured lens typically refers to tiny features designed into the lens surface or interior. These features can be variations in geometry, patterns, or materials used to alter the way light propagates to achieve specific optical effects.

[0049] Currently, there are various designs of microstructured lenses on the market, and their design principles can be broadly categorized into myopia defocus, retinal contrast, and higher-order aberrations. Lenses based on myopia defocus aim to increase myopia defocus, lenses based on higher-order aberrations aim to increase corneal higher-order aberrations, and lenses based on retinal contrast aim to reduce retinal contrast. The design structures of lenses also differ; for example, the maximum sagittal height of the microstructure, the diameter of the lens's optical zone, the microstructure fill rate, the microstructure diameter, and the microstructure surface shape may all vary. These differences in multiple design parameters make it difficult to intuitively determine the intensity of microstructure stimulation between lenses.

[0050] In some examples, the lens microstructure stimulation intensity can be preliminarily simulated by a step-by-step modeling simulation, and then the lens microstructure stimulation intensity is verified. In other examples, the actual lens wearing effect can be obtained by a time-consuming clinical trial, and then the lens microstructure stimulation intensity is verified. Therefore, there is a lack of a method that can directly and simply determine the microstructure stimulation intensity of the lens according to the design parameters of the lens.

[0051] Therefore, the embodiments of the present application provide a microstructure lens evaluation method, which aims to solve at least one of the above technical problems.

[0052] Please refer to Figure 1 , Figure 1 The flowchart of the microstructure lens evaluation method provided by the embodiments of the present application is shown.

[0053] The embodiments of the present application provide a microstructure lens evaluation method, which comprises:

[0054] S100: obtaining optical parameters of a microstructure lens and optical parameters of a reference lens, the optical parameters comprising structure parameters and a microstructure surface type;

[0055] S200: determining an evaluation coefficient of the microstructure lens based on the structure parameters of the microstructure lens, the structure parameters of the reference lens, a first diffraction spot size and a second diffraction spot size, the evaluation coefficient being used to represent the microstructure stimulation intensity of the microstructure lens, the first diffraction spot size being a diffraction spot size corresponding to the microstructure surface type of the microstructure lens, and the second diffraction spot size being a diffraction spot size corresponding to the microstructure surface type of the reference lens.

[0056] In the embodiments of the present application, the reference lens refers to a pre-set microstructure lens, and the optical parameters of the reference lens are pre-set known, i.e., the structure parameter data and the microstructure surface type of the reference lens can be pre-set based on actual implementation of the specific scheme. The structure parameters refer to the geometric characteristic parameters of the microstructure lens, which can include the geometric characteristic parameters of the microstructure on the lens, and can also include the geometric characteristic parameters of the lens itself, and the structure parameter data is different, the microstructure stimulation intensity of the lens is different. The microstructure surface type refers to the geometric shape of the microstructure on the surface or inside of the lens, and similarly, the microstructure surface type is different, the microstructure stimulation intensity of the lens is different. The diffraction spot size refers to the size of the light spot formed on the retina after parallel light source is imaged through the optical system composed of the lens and the human eye model, which is used to represent the imaging quality of the lens, i.e., the smaller the diffraction spot size, the clearer the imaging.

[0057] For example, in the embodiments of the present application, the microstructure lens is evaluated by the following method steps:

[0058] Firstly, the step S100 is performed to obtain the optical parameters of the microstructure lens and the optical parameters of the reference lens, and the purpose is to accurately obtain the optical parameters of the microstructure lens and the reference lens, so as to provide a data basis for subsequent evaluation.

[0059] Then, based on the parameter data obtained in step S100, step S200 is performed to determine the evaluation coefficient of the microstructure lens, and the evaluation coefficient is used to represent the microstructure stimulation intensity of the microstructure lens. The core of step S200 is to obtain the evaluation coefficient by quantitative calculation based on the parameter data obtained in step S100, so as to represent the microstructure stimulation intensity of the microstructure lens.

[0060] It should be noted that the evaluation method of the microstructure lens provided in the present application can also determine the size of the microstructure stimulation intensity between lenses, and the specific method steps are as follows:

[0061] Firstly, steps S100 to S200 are performed for each microstructure lens to obtain the evaluation coefficient corresponding to each microstructure lens, so as to represent the microstructure stimulation intensity of each microstructure lens. It should be noted that in the process of obtaining the evaluation coefficient corresponding to each microstructure lens, the reference lens corresponding to each microstructure lens is the same, that is, the optical parameters of the reference lens corresponding to each microstructure lens are the same, and each microstructure lens corresponds to the same reference lens.

[0062] Then, based on the evaluation coefficient corresponding to each microstructure lens, the size of the microstructure stimulation intensity between lenses can be determined.

[0063] It can be understood that the present application obtains the optical parameters of the microstructure lens and the reference lens, determines the evaluation coefficient of the microstructure lens, and then directly represents the microstructure stimulation intensity of the lens through the evaluation coefficient. Through this method, the tedious modeling simulation and time-consuming clinical trials are avoided, so that the microstructure stimulation intensity is verified more simply and efficiently. Moreover, through the method provided in the present application, a unified evaluation method is provided, which can directly determine the size of the microstructure stimulation intensity between lenses.

[0064] In some embodiments, based on the structure parameters of the microstructure lens, the structure parameters of the reference lens, the first diffraction spot size and the second diffraction spot size, the evaluation coefficient of the microstructure lens is determined, including:

[0065] S210: obtaining a lens evaluation model;

[0066] S220: inputting the structure parameters of the microstructure lens, the structure parameters of the reference lens, the first diffraction spot size and the second diffraction spot size into the lens evaluation model to determine the evaluation coefficient of the microstructure lens.

[0067] It needs to be understood that the lens evaluation model is a mathematical model capable of mapping the relationship between the structure parameters and the diffraction spot size and the microstructure stimulation intensity, that is, the lens evaluation model is a mathematical model capable of mapping the structure parameters, the first diffraction spot size and the second diffraction spot size corresponding to the microstructure lens and the reference lens respectively and the evaluation coefficient of the microstructure lens. Specifically, the structure parameters, the first diffraction spot size and the second diffraction spot size corresponding to the microstructure lens and the reference lens are input into the lens evaluation model, and then the lens evaluation model can output the evaluation coefficient of the microstructure lens to determine the evaluation coefficient of the microstructure lens.

[0068] It can be understood that through the application of the lens evaluation model, the universality of the model is significantly enhanced, which can adapt to various types of microstructure lenses. Not only does it improve the flexibility of the model, but it also enables intuitive comparison of the microstructure stimulation intensity between different lenses, thereby providing a more reliable basis for the selection and design of lenses.

[0069] In some embodiments, the lens evaluation model is obtained, comprising:

[0070] S211: determining the relationship between the structure parameters and the diffraction spot size;

[0071] S212: determining the lens evaluation model based on the target diffraction spot size corresponding to the target structure parameter, the second diffraction spot size and the size increase rate, the target structure parameter being determined based on the structure parameter of the microstructure lens and the structure parameter of the reference lens, and the size increase rate being determined based on the first diffraction spot size and the second diffraction spot size.

[0072] It needs to be understood that the relationship between the structure parameters and the diffraction spot size, the first diffraction spot size and the second diffraction spot size in the embodiments of the present application can be obtained by simulation means. The simulation means in the present application refers to modeling and simulating the human eye model and the microstructure lens model by using optical simulation tools, and then the imaging condition of the lens-eye system can be simulated. The optical simulation tool can use professional optical simulation software such as Zemax OpticStudio or Code V, etc.

[0073] In step S211, different structure parameter data corresponding to the diffraction spot size can be obtained through simulation, and then the relationship between the structure parameter and the diffraction spot size, i.e., the mapping relationship between the structure parameter and the diffraction spot size, can be determined. In addition, different microstructure surface type corresponding to the diffraction spot size can also be obtained through simulation, and then the first diffraction spot size and the second diffraction spot size, i.e., the diffraction spot size corresponding to the microstructure surface type of the microstructure lens and the diffraction spot size corresponding to the microstructure surface type of the reference lens, can be determined. Finally, in step S212, based on the target diffraction spot size corresponding to the target structure parameter, the second diffraction spot size and the size increase rate, a lens evaluation model is constructed. Then, the lens evaluation model is a mathematical model capable of mapping the relationship between the target diffraction spot size corresponding to the target structure parameter, the second diffraction spot size, the size increase rate and the microstructure stimulation intensity. However, the target diffraction spot size corresponding to the target structure parameter is determined based on the structure parameter of the microstructure lens and the structure parameter of the reference lens to determine the target structure parameter, and then the target diffraction spot size is determined. The size increase rate is determined based on the first diffraction spot size and the second diffraction spot size. Then, the structure parameters corresponding to the microstructure lens and the reference lens, the first diffraction spot size and the second diffraction spot size are input into the lens evaluation model, and then the lens evaluation model can output the evaluation coefficient of the microstructure lens.

[0074] In some embodiments, determining the relationship between the structure parameter and the diffraction spot size comprises:

[0075] Taking the structure parameter as a single variable, determining the diffraction spot size corresponding to different values of the structure parameter through simulation;

[0076] Based on the different values of the structure parameter and the diffraction spot size corresponding to the different values of the structure parameter, determining the relationship between the structure parameter and the diffraction spot size through a regression analysis method.

[0077] It should be understood that, in order to simplify the analysis process and clarify the influence of the structure parameter on the diffraction spot size, the single variable control method and the regression analysis method are used to determine the relationship between the structure parameter and the diffraction spot size.

[0078] Specifically, the process of determining the relationship between the structure parameter and the diffraction spot size through simulation comprises:

[0079] First, only one structure parameter is changed each time, and the rest of the parameters are fixed, and the diffraction spot size corresponding to different values of the structure parameter is obtained through simulation;

[0080] Then, after obtaining the corresponding diffraction spot size through single variable simulation, a continuous function relationship is fitted by using a regression analysis method, and the function relationship represents the relationship between the structure parameter and the diffraction spot size.

[0081] It should be noted that the regression analysis method refers to fitting the observation data of the independent variable (such as the structure parameter) and the dependent variable (such as the diffraction spot size) through a mathematical model, finding the optimal functional relationship between the two, and thus realizing the prediction or explanation of the dependent variable. In the regression analysis method, it can be assumed that the relationship between the independent variable and the dependent variable can be described by a linear function, for example, the independent variable is fitted in the form of a first-order term to determine the relationship between the structure parameter and the diffraction spot size. The regression analysis method can also assume that the relationship between the independent variable and the dependent variable can be described by a nonlinear function, for example, the independent variable is fitted in the form of a high-order term to determine the relationship between the structure parameter and the diffraction spot size. The independent variable can also be fitted in the form of an exponential term to determine the relationship between the structure parameter and the diffraction spot size. The independent variable can also be fitted in the form of a logarithmic term to determine the relationship between the structure parameter and the diffraction spot size. The construction of the function between the independent variable and the dependent variable aims to adjust the parameters in the fitted function to enable the fitted function to best explain the observation data, and the optimal estimation of the parameters is usually achieved by minimizing the sum of squares of errors. In addition, during the regression analysis method, in order to find the optimal functional relationship between the independent variable and the variable, the correlation coefficient (R 2 ), which is close to 1, indicates that the model has a stronger ability to explain the observation data and a better fitting degree. Further, the correlation coefficient can be used to determine the functional relationship between the independent variable and the variable. Thus, the relationship between the structure parameter and the diffraction spot size can be effectively fitted, which is beneficial to the construction of the lens evaluation model.

[0082] Please refer to Figure 2 , which is a schematic diagram of the microstructure covering the microstructure region on the lens surface proposed in the embodiments of the present application. Figure 2

[0083] In some embodiments, the structure parameters include the maximum sag of the microstructure, the microstructure filling rate, the diameter of the optical zone of the lens, and the diameter of the microstructure.

[0084] The relationship between the structure parameters and the diffraction spot size includes a first relationship between the maximum sag of the microstructure and the diffraction spot size, a second relationship between the microstructure filling rate and the diffraction spot size, a third relationship between the diameter of the optical zone of the lens and the diffraction spot size, and a fourth relationship between the diameter of the microstructure and the diffraction spot size.

[0085] The maximum sag of the microstructure refers to the vertical distance between the highest point of a single microstructure on the surface of the microstructure lens and the surface of the base lens. The microstructure filling rate refers to the coverage ratio of the microstructure in the microstructure region on the surface of the lens. Please refer to​Figure 2 The lens optical zone diameter refers to the diameter of an effective area on the lens for providing clear vision function for the central area of the retina. The microstructure diameter refers to the lateral dimension or width of a single microstructure.

[0086] It needs to be understood that the structural parameters can include the microstructure maximum sag, the microstructure fill rate, the lens optical zone diameter and the microstructure diameter. Further, the first relationship between the microstructure maximum sag and the diffuser spot size, the second relationship between the microstructure fill rate and the diffuser spot size, the third relationship between the lens optical zone diameter and the diffuser spot size and the fourth relationship between the microstructure diameter and the diffuser spot size can be determined respectively by using a single variable control method and a regression analysis method.

[0087] The determination of the lens evaluation model can be based on the first target diffuser spot size corresponding to the target microstructure maximum sag, the second target diffuser spot size corresponding to the target microstructure fill rate, the third target diffuser spot size corresponding to the target lens optical zone diameter, the fourth target diffuser spot size corresponding to the target microstructure diameter, the second diffuser spot size and the size increase rate to determine the lens evaluation model. The target microstructure maximum sag is determined based on the microstructure maximum sag of the microstructure lens and the microstructure maximum sag of the reference lens, the target microstructure fill rate is determined based on the microstructure fill rate of the microstructure lens and the microstructure fill rate of the reference lens, the target lens optical zone diameter is determined based on the lens optical zone diameter of the microstructure lens and the lens optical zone diameter of the reference lens, and the target microstructure diameter is determined based on the microstructure diameter of the microstructure lens and the microstructure diameter of the reference lens. Further, the microstructure maximum sag, the microstructure fill rate, the lens optical zone diameter and the microstructure diameter of the microstructure lens and the reference lens respectively corresponding to the first diffuser spot size and the second diffuser spot size are input into the lens evaluation model, and the lens evaluation model can output the evaluation coefficient of the microstructure lens.

[0088] In some embodiments, the first relationship and the fourth relationship satisfy a nonlinear relationship; the second relationship and the third relationship satisfy a linear relationship.

[0089] It needs to be understood that the first relationship between the maximum sag of the microstructure and the size of the diffused spot, the fourth relationship between the diameter of the microstructure and the size of the diffused spot satisfy a nonlinear relationship. The second relationship between the filling rate of the microstructure and the size of the diffused spot, the third relationship between the diameter of the optical zone of the lens and the size of the diffused spot satisfy a linear relationship. Further, in the regression analysis method, the independent variable (the maximum sag of the microstructure) can be fitted in the form of a logarithmic term to obtain the functional relationship between the maximum sag of the microstructure and the size of the diffused spot, the independent variable (the diameter of the microstructure) can be fitted in the form of a high-order term to obtain the functional relationship between the diameter of the microstructure and the size of the diffused spot, the independent variable (the filling rate of the microstructure) can be fitted in the form of a first-order term to obtain the functional relationship between the filling rate of the microstructure and the size of the diffused spot, and the independent variable (the diameter of the optical zone of the lens) can be fitted in the form of a first-order term to obtain the functional relationship between the diameter of the optical zone of the lens and the size of the diffused spot.

[0090] It can be understood that the present application explicitly defines the linear or nonlinear characteristics of the first relationship, the second relationship, the third relationship and the fourth relationship, so that the four types of relationships not only conform to the optical principles, but also are verified by experimental data, ensuring the implementability and accuracy of the technical solutions, thereby further improving the accuracy of the lens evaluation model.

[0091] In some embodiments, the size of the diffused spot in the embodiments of the present application is represented by the root-mean-square radius of the diffused spot.

[0092] It needs to be understood that for a mirror eye system, the main methods for predicting and evaluating the optical performance thereof include the point spread diagram and the modulation transfer function. Since in an optical system with large aberration, when the maximum wave aberration of the edge of the exit pupil is greater than λ / 2, λ being the wavelength of the light wave in the optical system, the optical transfer function in the partial frequency region is negative, that is, the modulation transfer function will have a "bottom bounce" phenomenon in the region, resulting in the inversion of contrast, but the actual imaging contrast in the optical system only decreases with the increase of the spatial frequency. When the system aberration is large and the contrast inversion phenomenon occurs, the modulation transfer function at this time produces "pseudo resolution", and the contrast value is not conducive to judgment. Therefore, the present application selects the point spread diagram more suitable for a large aberration system to evaluate the optical performance of the mirror eye system. When the light passes through the mirror eye system composed of the microstructure lens and the model eye, due to the original aberration of the mirror eye system and the effect of the microstructure, more light rays converge on the retina at different points, rather than at the same point, thereby causing the reduction of the peripheral vision quality of the retina. The image describing the diffused spot is called the point spread diagram, and the size of the diffused spot is usually described by the root-mean-square (RMS) radius. Therefore, the present application uses the diffused spot as an evaluation means to establish an evaluation system of the microstructure lens, so as to preliminarily and rapidly judge the microstructure stimulation intensity, thereby providing a reference for studying the correlation between the myopia management effect of the microstructure lens and the microstructure stimulation intensity.

[0093] In some embodiments, the first and second diffraction spot sizes are determined by the following steps:

[0094] The microstructure surface type is taken as a single variable, and the diffraction spot sizes corresponding to different types of the microstructure surface type are determined by simulation;

[0095] The first and second diffraction spot sizes are determined from the diffraction spot sizes corresponding to different types of the microstructure surface type.

[0096] Specifically, the process of determining the first and second diffraction spot sizes by simulation is as follows:

[0097] First, only the type of the microstructure surface type is changed each time, and the rest of the parameters are fixed, and the corresponding diffraction spot sizes under different types of the microstructure surface type are obtained by simulation. It should be noted that the microstructure surface type can include spherical surface, aspherical surface, and curved surface with alternating positive and negative curvatures, etc.

[0098] Then, after obtaining the corresponding diffraction spot sizes based on the single variable simulation, the first and second diffraction spot sizes can be determined from the diffraction spot sizes corresponding to different types of the microstructure surface type. That is, the types of the microstructure surface type for simulation include the microstructure surface type of the microstructure lens and the microstructure surface type of the reference lens.

[0099] It should be noted that the structure parameters corresponding to the second diffraction spot size are the structure parameters of the reference lens. The structure parameters of the reference lens can be set according to the actual implementation scheme.

[0100] The relationship between the structure parameters and the diffraction spot sizes, the first and second diffraction spot sizes determined by simulation are exemplarily illustrated by the following simulation process:

[0101] Please refer to Figure 3 shown in the figure. Figure 3 The macular fovea angle and the field of view angle diagram shown in the figure is proposed for the embodiments of the present application.

[0102] As can be known, when external light enters the human eye refractive system, the pupil of the human eye is equivalent to the aperture stop of the mirror eye system, which determines the macular fovea angle and the field of view angle of the human eye, as shown in Figure 3 The black dashed line in the figure is the optical axis, the angle between the red dashed line and the optical axis is the macular fovea angle β, the angle between the green dashed line and the optical axis is the field of view angle θ, a is the distance from the anterior surface of the cornea to the center of the pupil, b is the diameter of the pupil, c is the mirror eye distance, d is the lens diameter at a specific position of the lens, m is the lens center thickness, and n is the distance from the anterior surface of the lens to the optical axis at a specific position of the lens. The specific position refers to the lens position corresponding to the edge of the macular fovea angle β or the field of view angle θ. Furthermore, according to Figure 3The position relationship between the eye and the lens can calculate the macular fovea angle β and the field of view angle θ, and the formulas are as follows:

[0103]

[0104] It is found that the blur signal applied to the retinal periphery can affect the axial growth of the eye axis, but the blur signal above the macular fovea angle of about ± 20° cannot always inhibit the axial growth of the eye axis, therefore, the simulation analysis is performed on the effect of the blur signal applied around and within the macular fovea angle of ± 20°, and the lens radius and the field of view angle of the specific position corresponding to the limited macular fovea angle are determined. Further, according to the limited macular fovea angle range and other pre-selected lens-eye system parameters, the lens diameter of the specific position simulated in the embodiment of the application is about 10 mm, and the field of view angle is about ± 12.5°, which can be determined by formulas (1) and (2).

[0105] Please refer to Figure 4 as shown, Figure 4 which is a schematic diagram of the optical path of the myopic eye system provided in the embodiment of the application.

[0106] Since the pupil diameter of the human eye under normal lighting conditions is generally in the range of 2 mm to 5 mm, the visual quality of the human eye with a pupil diameter of 2 mm to 3 mm is relatively good under relatively good lighting conditions, and the pupil diameter generally exceeds 5 mm when the lighting is relatively weak, and the human eye is most sensitive to green light of 550 nm. In view of the above, a pupil diameter of 2.8 mm, a lens-eye system wavelength of 550 nm, and a lens-eye distance of 12 mm are selected for simulation in the embodiment of the application, and a myopic eye model is established based on the Liou model eye and other pre-set lens-eye system parameters to optimize the system, as shown in Figure 4 The myopic eye model can include key structures such as eyeglasses, cornea, lens, vitreous body, and retina, and accurately simulate the optical properties of the myopic eye, providing a reliable basis for the following simulation.

[0107] Based on the above pre-selected lens-eye system parameters, the influence of the maximum height H of the microstructure, the filling rate F of the microstructure, the diameter D0 of the optical zone of the lens, the diameter D1 of the microstructure, and the surface profile S of the microstructure on the visual quality of the retina periphery is determined, i.e., the first relationship between the maximum height of the microstructure and the size of the diffraction spot, the second relationship between the filling rate of the microstructure and the size of the diffraction spot, the third relationship between the diameter of the optical zone of the lens and the size of the diffraction spot, and the fourth relationship between the diameter of the microstructure and the size of the diffraction spot, the first diffraction spot size, and the second diffraction spot size. By changing one of the optical parameters of the lens and keeping the remaining parameters unchanged, modeling and simulation are performed using the optical design software zemax to analyze the changes of the diffraction spot of the lens-eye system.

[0108] Please refer toFigures 5 to 9 As shown, Figure 5 The microstructure arrangement schematic diagram of different microstructure maximum sag lenses proposed by the embodiment of the application; Figure 6 The microstructure arrangement schematic diagram of different microstructure fill factor lenses proposed by the embodiment of the application; Figure 7 The microstructure arrangement schematic diagram of different lens optical zone diameter lenses proposed by the embodiment of the application; Figure 8 The microstructure arrangement schematic diagram of different microstructure diameter lenses proposed by the embodiment of the application; Figure 9 The different lens microstructure surface shape schematic diagram proposed by the embodiment of the application.

[0109] In order to more simply analyze the influence of each influencing factor on the retinal peripheral vision quality, in the process of determining the first relationship between the microstructure maximum sag and the diffraction spot size, other optical parameters are kept unchanged, and the microstructure maximum sags H are selected as 0.640 μm, 0.853 μm, 1.067 μm, 1.280 μm, 1.493 μm and 1.707 μm respectively, and a single microstructure with different microstructure maximum sags H is designed to be established at the geometric center of the lens, as shown in Figure 5 .

[0110] In the process of determining the second relationship between the microstructure fill factor and the diffraction spot size, other optical parameters are kept unchanged, and the microstructure fill factors F are selected as 25.51%, 38.27%, 51.02% and 63.78% respectively, and the microstructure arrangement is as shown in Figure 6 . Figure 6 In the figure, ① indicates that F is 25.51%, ② indicates that F is 38.27%, ③ indicates that F is 51.02%, and ④ indicates that F is 63.78%.

[0111] In the process of determining the third relationship between the lens optical zone diameter and the diffraction spot size, since the lens optical zone diameters D0 on the market are mostly between 6 mm and 9 mm, D0 is selected as 6.0 mm, 6.5 mm, 7.0 mm, 7.5 mm, 8.0 mm and 8.5 mm respectively, as shown in Figure 7 . Figure 7 In the figure, ① indicates that D0 is 6.0 mm, ② indicates that D0 is 6.5 mm, ③ indicates that D0 is 7.0 mm, ④ indicates that D0 is 7.5 mm, ⑤ indicates that D0 is 8.0 mm, ⑥ indicates that D0 is 8.5 mm, X means the microstructure, Y means the entrance pupil aperture at the field angle of 12.5°, and Z means the lens optical zone diameter D0.

[0112] In the process of determining the fourth relationship between the microstructure diameter and the diffraction spot size, the microstructure diameters D1 are selected as 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm and 1.2 mm respectively, and the microstructure is established in the central field for analysis.Figure 8 As shown. Figure 8 In the table, ① indicates that D1 is 0.8 mm, ② indicates that D1 is 0.9 mm, ③ indicates that D1 is 1.0 mm, ④ indicates that D1 is 1.1 mm, and ⑤ indicates that D1 is 1.2 mm.

[0113] In the process of determining the first and second diffraction spot sizes, since most microstructures on the market have a spherical surface, an aspherical surface, etc., the embodiments of the present application select a curved surface having alternating positive and negative curvature characteristics in addition to the above-mentioned surface types, such as Figure 9 As shown, wherein the aspherical surface adopts a parabolic surface, the curved surface 1 having alternating positive and negative curvature characteristics is a saddle surface, the curved surface 2 having alternating positive and negative curvature characteristics is a two-spherical surface spliced curved surface, and the microstructure arrangement is the same as Figure 5 It should be noted that the microstructures not specially indicated in the figure are convex structures protruding from the base lens, and the microstructures indicated are concave structures recessed in the base lens. In the figure, ① indicates a spherical surface, ② indicates a spherical surface (recessed), ③ indicates a parabolic surface, ④ indicates a cylindrical surface, ⑤ indicates a curved surface 1 having alternating positive and negative curvature characteristics, and ⑥ indicates a curved surface 2 having alternating positive and negative curvature characteristics.

[0114] Further, according to the simulation of the above-mentioned microstructure parameters and layout of each mirror eye system, the RMS radius (root mean square radius) on the retina can be obtained as shown in Tables 1 to 5, Table 1 is the RMS data of different microstructure maximum sag lenses, Table 2 is the RMS data of different microstructure fill rate lenses, Table 3 is the RMS data of different lens optical zone diameter lenses, Table 4 is the RMS data of different microstructure diameter lenses, and Table 5 is the RMS data of different microstructure surface type lenses.

[0115] Table 1

[0116] Maximum height of microstructure H, pm RMS radius, pm 0.640 5.893 0.853 7.826 1.067 8.887 1.280 9.881 1.493 10.490 1.707 12.166

[0117] Table 2

[0118] Fill rate of microstructure F, % RMS radius, pm 25.51 10.738 38.27 13.200 51.02 15.110 63.78 16.827 76.53 18.253

[0119] Table 3

[0120] Lens optical zone diameter D0, mm RMS radius, pm 6 17.954 6.5 15.582 7 12.761 7.5 11.347 8 9.603 8.5 7.390

[0121] Table 4

[0122] Microstructure diameter D1, mm RMS radius, pm 0.8 23.079 0.9 20.610 1 18.253 1.1 17.042 1.2 16.065

[0123] Table 5

[0124]

[0125] Based on the data in Tables 1-4 above, a relationship diagram between each structural parameter and the RMS radius can be established. See Figures 10 to 13 Figure 10 A relationship diagram between the maximum sag of the microstructure and the RMS radius proposed by the embodiments of the present application is shown in the figure. Figure 11 A relationship diagram between the microstructure fill rate and the RMS radius proposed by the embodiments of the present application is shown in the figure. Figure 12 A relationship diagram between the optical zone diameter of the lens and the RMS radius proposed by the embodiments of the present application is shown in the figure. Figure 13 A relationship diagram between the microstructure diameter and the RMS radius proposed by the embodiments of the present application is shown in the figure.

[0126] To quantify the relationship between each structural parameter and the RMS radius, regression analysis was performed on the RMS data shown in Tables 1-4 and the relationship diagrams shown in the figures. Figures 10 to 13 It was found that a curve as shown in Equation (3) can be established between the independent variables of the maximum sag of the microstructure H, the microstructure fill rate F, the optical zone diameter of the lens D0, and the microstructure diameter D1 and the RMS radius, respectively:

[0127]

[0128] wherein f(H), f(F), f(D0), and f(D1) represent the dependent variable of the RMS radius corresponding to the independent variables of the maximum sag of the microstructure H, the microstructure fill rate F, the optical zone diameter of the lens D0, and the microstructure diameter D1, respectively. Further, the function corresponding to f(H) represents the first relationship between the maximum sag of the microstructure and the size of the diffused spot, the function corresponding to f(F) represents the second relationship between the microstructure fill rate and the size of the diffused spot, the function corresponding to f(D0) represents the third relationship between the optical zone diameter of the lens and the size of the diffused spot, and the function corresponding to f(D1) represents the fourth relationship between the microstructure diameter and the size of the diffused spot.

[0129] It can be known that, by analyzing Figures 10 to 13 It can be found that the size of the diffused spot is positively correlated with the maximum sag of the microstructure and the fill rate, and is negatively correlated with the optical zone diameter of the lens and the microstructure diameter. Therefore, the value of k1 in the equation is positive, and k1 can be fitted to be 5.9204 and m1 can be fitted to be 8.5575; the value of k2 is positive, and k2 can be fitted to be 0.1463 and m2 can be fitted to be 7.3628; the value of k3 is negative, and k3 can be fitted to be -4.1275 and m3 can be fitted to be 42.374; k4 is negative and m4 is positive, and k4 can be fitted to be -0.909 and m4 can be fitted to be 18.672, and the correlation coefficient R 2 between each fitted curve and the actual data is 0.9808, 0.9893, 0.9916, and 0.9899, respectively, which are all approximately 1, indicating that the quantitative models established by fitting the regression curves are very close to the actual data recorded. ​

[0130] In addition, as can be seen from the data in Table 5, the microstructure surface type affects the retinal spot size. For example, the spot size of the spherical microstructure is taken as the reference, the spot size of the spherical concave microstructure is relatively larger, the RMS radius increases by 14.829%; the spot size of the aspherical microstructure is relatively smaller, but the change is not very obvious, the decrease rate is 0.001%, almost zero; the spot size of the cylindrical microstructure is relatively much smaller, the decrease rate is 34.884%; the spot size of the surface 1 with alternating positive and negative curvatures is 40.611% smaller than that of the spherical surface; the spot size of the surface 2 with alternating positive and negative curvatures is 117.073% larger than that of the spherical surface. It should be noted that the microstructure surface type of the reference lens can be any one of the above types, and the structure parameters in the simulation process corresponding to Table 5 are the structure parameters corresponding to the reference lens. The microstructure surface type and structure parameters of the reference lens can be set according to the actual implementation requirements.

[0131] It can be known that since the design indicators of most microstructure lenses on the market are the defocus amount of the microstructure, the maximum sag of the microstructure can be roughly known according to the defocus amount, and the larger the defocus amount, the higher the maximum sag of the microstructure. Therefore, it can be concluded that the larger the defocus amount of the microstructure, the larger the retinal spot. It is also found that the myopia management effect of the lens with a defocus amount of +1.2D is only 20%, while the myopia management effect of the lens with a defocus amount of +4.5D is increased to 80%, and between the defocus amounts of +1.2D and +4.5D, the myopia management effect of the lens gradually increases with the increase of the defocus amount, which further indicates that within a certain range of values, the larger the defocus amount, i.e. the higher the maximum sag, the larger the spot, and the better the myopia management effect of the lens.

[0132] In addition, through clinical exploration of the myopia management effect of different design microstructure lenses on adolescents, it is found that the higher the filling rate, the smaller the lens control equivalent spherical power and the axial length growth, and the more stable the clinical data. Therefore, within a certain range, moderately increasing the filling rate of the microstructure will increase the spot, which may affect the myopia management effect of the lens.

[0133] In addition, based on the research on the influence of the size of the optical zone of orthokeratology lenses on the effect of myopia management, it is found that the orthokeratology lens with a 6mm optical zone diameter has better one-year control effect and less axial length growth than the one with a 5mm optical zone diameter. Meanwhile, in the research on the influence of the size of the defocus ring and its relationship with the pupil diameter on the axial length growth of myopia patients wearing orthokeratology lenses, it is found that the axial length growth rate of children in the smaller defocus ring diameter group is slower, with only 0.17mm growth in one year, while the axial length growth of children in the larger defocus ring group reaches 0.36mm in one year. These also show that appropriately reducing the diameter of the optical zone of the lens to increase the diffraction spot on the retina may be more beneficial to inhibit the axial length growth and delay the deepening of myopia. Moreover, through equation (3), it can be found that appropriately reducing the diameter of the microstructure is beneficial to increasing the diffraction spot on the retina, which may be more helpful for myopia management.

[0134] Furthermore, based on the maximum sag of the microstructure, the microstructure filling rate, the diameter of the optical zone of the lens and the diameter of the microstructure, and the microstructure surface profile, the lens evaluation model is constructed, which not only conforms to the optical principle, but also is verified by experimental data, ensuring the feasibility and accuracy of the technical solution.

[0135] In some embodiments, based on the target diffraction spot size corresponding to the target structure parameter, the second diffraction spot size and the size increase rate, the lens evaluation model is determined, comprising:

[0136] The lens evaluation model is determined by the following formula:

[0137] DPME=[f(ΔH)+f(ΔF)+f(ΔD0)+f(ΔD1)+R0](1+k)(4);

[0138] wherein,

[0139] In the formula, DPME represents the lens evaluation model for obtaining the evaluation coefficient of the microstructure lens, f(ΔH) represents the first target diffraction spot size, f(ΔF) represents the second target diffraction spot size, f(ΔD0) represents the third target diffraction spot size, f(ΔD1) represents the fourth target diffraction spot size, R0 represents the second diffraction spot size, and k represents the size increase rate, i.e. k is the increase rate of the diffraction spot size generated by the microstructure surface profile of the microstructure lens compared with the diffraction spot size generated by the microstructure surface profile of the reference lens, i.e. the RMS radius increase rate of the microstructure surface profile of the microstructure lens compared with the reference lens. The first target structure parameter is determined by the first relationship based on the maximum sag H of the microstructure of the microstructure lens and the maximum sag H0 of the microstructure of the reference lens, the second target structure parameter is determined by the second relationship based on the microstructure filling rate F of the microstructure of the microstructure lens and the microstructure filling rate F0 of the reference lens, and the third target structure parameter is determined by the third relationship based on the diameter D0 of the optical zone of the lens of the microstructure of the microstructure lens and the diameter D 00The fourth target structure parameter is determined through a third relationship determination, and is based on a microstructure diameter D1 of the microstructure lens and a microstructure diameter D of the reference lens 10 The fourth target structure parameter is determined through a fourth relationship determination.

[0140] It needs to be understood that the first target diffraction spot size is determined through a first relationship determination, that is, the target microstructure maximum sag is determined based on the microstructure maximum sag of the microstructure lens and the microstructure maximum sag of the reference lens, and through the first relationship, the first target diffraction spot size corresponding to the target microstructure maximum sag is determined. The second target diffraction spot size is determined through a second relationship determination, that is, the target microstructure fill factor is determined based on the microstructure fill factor of the microstructure lens and the microstructure fill factor of the reference lens, and through the second relationship, the second target diffraction spot size corresponding to the target microstructure fill factor is determined. The third target diffraction spot size is determined through a third relationship determination, that is, the target lens optical zone diameter is determined based on the lens optical zone diameter of the microstructure lens and the lens optical zone diameter of the reference lens, and through the third relationship, the third target diffraction spot size corresponding to the target lens optical zone diameter is determined. The fourth target diffraction spot size is determined through a fourth mapping relationship determination, that is, the target microstructure diameter is determined based on the microstructure diameter of the microstructure lens and the microstructure diameter of the reference lens, and through the fourth relationship, the fourth target diffraction spot size corresponding to the target microstructure diameter is determined.

[0141] It can be known that the variables in formula (5) are brought into the corresponding fitting function in formula (3), that is, f(ΔH), f(ΔF), f(ΔD0), and f(ΔD1) can be obtained, and then the evaluation coefficient of the microstructure lens can be determined through formula (4), and the evaluation coefficient is used to characterize the microstructure stimulation intensity of the microstructure lens.

[0142] It can be known that the main influencing factors of the current most microstructure lenses for myopia management effect are microstructure defocus amount, fill factor, diameter, face shape, and lens optical zone diameter, etc., but when multiple design parameters change at the same time, the optical performance of the lens may not be accurately or quickly compared, that is, the pros and cons of the myopia management effect cannot be accurately or quickly compared. Therefore, in order to facilitate the simple evaluation of the pros and cons of the optical performance of the lens according to the main design parameters of the lens, the present application embodiment proposes a comprehensive and simple evaluation method-microstructure stimulation intensity evaluation system based on diffraction spot.

[0143] To establish the evaluation system, the embodiment of the present application sets multiple influence factor variables, designs multiple microstructure lenses with different design parameters, simulates using zemax optical design software and records the diffraction spot data, finds through regression analysis that the diffraction spot size is positively correlated with the maximum sag of the microstructure, positively correlated with the defocus amount, positively correlated with the microstructure filling rate, negatively correlated with the diameter of the optical zone of the lens, negatively correlated with the microstructure diameter, and different face shapes will also cause the change of the diffraction spot size. Further, based on the structural parameters such as the maximum sag of the microstructure, the microstructure filling rate, the diameter of the optical zone of the lens and the microstructure diameter, and the microstructure face shape, the lens evaluation model is constructed, the evaluation coefficient of the microstructure lens is determined through the lens evaluation model, and then the microstructure stimulation intensity of the microstructure lens is represented through the evaluation coefficient.

[0144] To further verify the accuracy of the lens evaluation model constructed by the present application, the embodiment of the present application verifies by selecting multiple products on the market, wherein product 1 is taken as the reference lens, the diffraction spot radius generated on the retina is taken as R0, the evaluation coefficient of products 2, 3, 4 and 5 can be evaluated by using formula (4), and the diffraction spot data in the zemax simulation result is used to assist verifying the accuracy of the evaluation result, and the evaluation result is shown in Table 6, which is the RMS radius data of different microstructure lens products.

[0145] Table 6

[0146]

[0147] From Table 6, it can be found that the evaluation coefficient trend of the microstructure lens evaluated by the lens evaluation model constructed by the present application is consistent with the diffraction spot radius change trend in the zemax simulation result, which shows that the lens evaluation model proposed by the present application has certain feasibility and accuracy, and can be used to simply judge the diffraction spot level of the adolescent myopia management lens based on different principles or different designs, so as to facilitate the correlation between the diffraction spot level and the myopia management effect.

[0148] In summary, the embodiment of the present application proposes an evaluation method for microstructure lenses, which avoids tedious modeling simulation and time-consuming clinical trials, and makes it more simple and efficient to verify the microstructure stimulation strength. Moreover, the method provided by the present application provides a unified evaluation method, which can intuitively determine the microstructure stimulation strength between lenses. In addition, in the application of myopia management lenses for teenagers, the evaluation method uses a diffused spot as an evaluation means to preliminarily and rapidly determine the microstructure stimulation strength of the myopia management lenses for teenagers, thereby providing a reference for studying the correlation between the myopia management effect of the microstructure lenses and the microstructure stimulation strength. Moreover, the evaluation system comprehensively considers various factors and finds that the diffused spot radius is positively correlated with the maximum height of the microstructure, positively correlated with the microstructure filling rate, negatively correlated with the diameter of the optical zone of the lens, negatively correlated with the diameter of the microstructure, and the change in the face shape also affects the diffused spot radius, which is consistent with the optical principle and is verified by experimental data, thereby ensuring the feasibility and accuracy of the technical solution.

[0149] The embodiment of the present application also provides a lens obtained by using the evaluation method for microstructure lenses in the above embodiment.

[0150] In some embodiments, the lens can be cast or injection molded by a metal mold, or cast by a glass mold into a desired prescription power or a semi-finished product, and the semi-finished product is then machined to obtain a desired prescription power on the inner surface of the semi-finished product. In some embodiments, the lens can also be made into a desired prescription power or a semi-finished product by a UV light curing process using a metal and glass mold, and the semi-finished product is then machined to obtain a desired eyeglass lens for a wearer or an eyeglass lens or eyeglass lens blank made by a fitting process.

[0151] In some embodiments, the material of the lens includes a high polymer material or an inorganic non-metallic material. The high polymer material includes a thermoplastic resin or a thermosetting resin, and the inorganic non-metallic material includes glass and the like. The thermoplastic resin includes polycarbonate or polymethyl methacrylate; the thermosetting resin includes any one of an acrylic resin, a ring sulfur resin, a thio urethane resin, an allyl resin, and a polyurethane.

[0152] In some embodiments, the surface of at least one side of the lens is formed with a coating film, which includes a transparent coating film for increasing the light transmittance of the lens, a hard coating film for increasing the durability of the lens, a reflective film for blocking harmful light, an anti-reflective and anti-fogging film for achieving imaging visibility, a polarizing film with a color-changing function, or other color-changing films doped with a material sensitive to ultraviolet light, and the like. The coating film itself can have different colors, and the color visually observed in the case of reflection can be green, blue, yellow, purple, and the like, or other colors.

[0153] In some embodiments, the microstructure lens is directly prepared by a mold, which can include an upper mold base and a lower mold base, and the working surface of the upper mold base is concave and is respectively used for forming the first surface and the second surface.

[0154] In some embodiments, the lens obtained by the above process can be further combined with a spectacle frame to obtain a spectacle, and the shape of the lens can be circular, square, oval or other irregular shape. It should be noted that the shape of the lens is substantially the above shape, and is not limited to a perfect geometric shape.

[0155] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0156] The evaluation method of the microstructure lens provided by the embodiments of the present application and the lens are described in detail above, and specific examples are applied to describe the principles and implementation modes of the present application. The above embodiment description is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as a limitation of the present application.

Claims

1. A method for evaluating microstructured lenses, characterized in that, include: Obtain the optical parameters of the microstructured lens and the optical parameters of the reference lens, wherein the optical parameters include structural parameters and microstructure surface shape; Based on the structural parameters of the microstructured lens, the structural parameters of the reference lens, the first diffusion spot size, and the second diffusion spot size, an evaluation coefficient for the microstructured lens is determined. The evaluation coefficient is used to characterize the microstructure stimulation intensity of the microstructured lens. The first diffusion spot size is the diffusion spot size corresponding to the microstructure surface shape of the microstructured lens, and the second diffusion spot size is the diffusion spot size corresponding to the microstructure surface shape of the reference lens.

2. The evaluation method for microstructured lenses according to claim 1, characterized in that, The determination of the evaluation coefficient of the microstructured lens based on the structural parameters of the microstructured lens, the structural parameters of the reference lens, the first spot size, and the second spot size includes: Obtain the lens evaluation model; The structural parameters of the microstructured lens, the structural parameters of the reference lens, the size of the first diffusion spot, and the size of the second diffusion spot are input into the lens evaluation model to determine the evaluation coefficient of the microstructured lens.

3. The evaluation method for microstructured lenses according to claim 2, characterized in that, The lens evaluation model includes: Determine the relationship between structural parameters and speckle size; The lens evaluation model is determined based on the target dispersion spot size, the second dispersion spot size, and the size increase rate corresponding to the target structural parameters. The target structural parameters are determined based on the structural parameters of the microstructure lens and the structural parameters of the reference lens, and the size increase rate is determined based on the first dispersion spot size and the second dispersion spot size.

4. The evaluation method for microstructured lenses according to claim 3, characterized in that, Determining the relationship between structural parameters and dispersion spot size includes: Using the structural parameter as a single variable, the size of the dispersion spot corresponding to different values ​​of the structural parameter was determined by simulation. Based on the different values ​​of the structural parameters and the corresponding speckle sizes, the relationship between the structural parameters and the speckle sizes is determined by regression analysis.

5. The evaluation method for microstructured lenses according to claim 3, characterized in that, The structural parameters include the maximum sagittal height of the microstructure, the microstructure fill rate, the diameter of the lens optical zone, and the diameter of the microstructure. The relationship between the structural parameters and the size of the dispersion spot includes: The first relationship between the maximum sagittal height of the microstructure and the size of the diffusion spot, the second relationship between the microstructure fill rate and the size of the diffusion spot, the third relationship between the diameter of the lens optical zone and the size of the diffusion spot, and the fourth relationship between the diameter of the microstructure and the size of the diffusion spot.

6. The evaluation method for microstructured lenses according to claim 5, characterized in that, The process of determining the lens evaluation model based on the target dispersion spot size corresponding to the target structural parameters, the second dispersion spot size, and the size increase rate includes: The lens evaluation model is determined using the following formula: DPME=[f(ΔH)+f(ΔF)+f(ΔD0)+f(ΔD1)+R0](1+k); in, In the formula, DPME represents the lens evaluation model, f(ΔH) represents the first target blur size, f(ΔF) represents the second target blur size, f(ΔD0) represents the third target blur size, f(ΔD1) represents the fourth target blur size, R0 represents the second blur size, and k represents the size increase rate. The first target structural parameter is determined based on the maximum microstructure height H of the microstructure lens and the maximum microstructure height H0 of the reference lens through the first relationship. The second target structural parameter is determined based on the microstructure fill rate F of the microstructure lens and the microstructure fill rate F0 of the reference lens through the second relationship. The third target structural parameter is based on the lens optical area diameter D0 of the microstructure lens and the lens optical area diameter D of the reference lens. 00 The fourth target structural parameter, determined through the third relationship, is based on the microstructure diameter D1 of the microstructure lens and the microstructure diameter D of the reference lens. 10 Determined through the fourth relationship.

7. The evaluation method for microstructured lenses according to claim 5, characterized in that, The first relationship and the fourth relationship satisfy a non-linear relationship; The second relationship and the third relationship satisfy a linear relationship.

8. The evaluation method for microstructured lenses according to claim 1, characterized in that, The size of the first and second diffusion spots are determined through the following steps: Using the microstructure surface shape as a single variable, the size of the dispersion spot corresponding to different types of the microstructure surface shape was determined by simulation. The first and second diffuse spot sizes are determined from the diffuse spot sizes corresponding to the different types of the microstructure surface.

9. The evaluation method for microstructured lenses according to claim 1, characterized in that, The size of the diffuse spot is characterized by the root mean square radius of the diffuse spot.

10. A lens, characterized in that, The microstructure lens was obtained using the evaluation method described in any one of claims 1 to 9.

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