A partitioned scattering optical lens for myopia control and its design method

Abstract

This invention discloses a partitioned scattering optical lens for myopia control and its design method, applied in the field of optical technology. It aims to solve the problem in existing technologies where central visual quality and peripheral myopia control effects cannot be simultaneously achieved. The optical lens includes a central optical zone, a peripheral optical zone, and a smooth transition zone. The central optical zone has a low scattering coefficient and a high MTF, achieving a high modulation transfer function and low scattering loss. The peripheral optical zone has a high scattering coefficient and a low MTF, used to induce peripheral myopic defocus. The smooth transition zone achieves a continuous and gradual change in scattering coefficient to avoid abrupt visual changes and ensure visual comfort. The design method includes obtaining eye parameters, defining optical performance targets, designing microstructures, and performing simulation optimization. Through the above scheme, this invention effectively decouples central visual acuity and peripheral myopia control, ensuring high-definition vision, inhibiting myopia progression, and improving wearing comfort.

Description

Technical Field

[0001] This invention relates to the field of optical technology, and in particular to a partitioned scattering optical lens for myopia control and its design method. Background Technology

[0002] In recent years, the prevalence of myopia has been increasing globally, especially among children and adolescents. Myopia not only affects an individual's quality of life but can also lead to a series of ocular complications such as retinal detachment and macular degeneration, causing long-term and irreversible damage to vision. Given the irreversible nature of myopia progression, effectively controlling its occurrence and development has become a core focus of research and application in the field of optometry, its importance being self-evident. Against this backdrop, in addition to traditional eyeglasses and contact lenses for vision correction, innovative optical products that can actively intervene in myopia progression, especially optical lenses designed for myopia control, are receiving increasing attention and high expectations.

[0003] Against this technological backdrop, contrast-controlled myopia control lenses have emerged as an important intervention method. The basic design principle of these lenses lies in introducing specific microstructures, such as microlens arrays, microdiffraction structures, or scattering lattices, onto the lens surface to induce specific optical defocus signals in the peripheral retina, typically myopic defocus or positive spherical aberration, thereby inhibiting excessive elongation of the axial length. These microstructures, through fine modulation of incident light, can effectively change the sharpness, contrast, or spatial frequency distribution of retinal imaging, thus providing signals to the eye's biological regulatory system to inhibit myopia progression. Early designs, in order to simplify manufacturing processes and ensure the coverage of optical functions, typically used a method of uniformly distributing the same microstructures across the entire lens surface to achieve this light scattering and modulation. This uniform design strategy, to a certain extent, provided a new approach to myopia control, breaking through the single scope of traditional optical correction and marking a technological leap from passive vision correction to active vision intervention. For the technological development at that time, this was undoubtedly a milestone.

[0004] However, with a deeper understanding of myopia control mechanisms and increasingly higher user demands for visual quality, some inherent characteristics of the aforementioned homogeneous design scheme at the principle level have gradually revealed insurmountable limitations when facing new challenges, and its inherent deep contradictions have become increasingly prominent. At its root, this homogeneous design scheme cannot simultaneously address the essential differences in visual function between the central and peripheral regions of the human eye. Specifically, the human eye has extremely high requirements for the visual imaging quality of the central macula, which is primarily responsible for fine vision, detail recognition, and color perception, and is highly sensitive to the modulation transfer function (MTF), contrast, and brightness uniformity of the image. Therefore, if excessively high scattering intensity is designed to ensure peripheral myopia control (i.e., introducing high-density or high-curvature microstructures), this high-intensity scattering will inevitably extend to the central visual area of ​​the lens. In this area, excessive scattering causes incident light to diffuse, making originally clear images blurry, drastically reducing contrast, and potentially inducing annoying glare, severely affecting the wearer's visual clarity and comfort. For example, in daily activities that require high visual concentration and fine discrimination, such as reading, studying, or driving, this deterioration in central vision will greatly reduce the user's visual experience and may even lead to abandonment of wearing the device due to visual discomfort, seriously affecting treatment adherence.

[0005] Conversely, if the optical scattering intensity of the entire lens is deliberately reduced to maximize the protection of central visual quality and avoid blurring and glare in the central area, another equally serious problem arises: the myopia control signal in the peripheral area will be significantly weakened due to insufficient scattering intensity. The reception and response of the peripheral retina to myopia control signals is a crucial step in inhibiting axial elongation. If the defocus signal intensity in the peripheral area is insufficient or its spatial frequency characteristics do not meet the optimal requirements for biological intervention, the eye may not receive an effective "stop growth" command, resulting in ineffective inhibition of myopia progression. Ultimately, the myopia control effect of the lens fails to meet expectations, and its core therapeutic goal will be difficult to achieve. This trade-off between "central clarity at the expense of peripheral control, and effective peripheral control at the expense of central visual quality" is not a simple performance trade-off, but rather an inherent optical principle conflict in uniform design. That is, the same optical parameters cannot simultaneously satisfy two drastically different visual needs: high central resolution and peripheral biological intervention. Existing uniform design schemes, in essence, fail to effectively decouple central visual quality from peripheral control effectiveness, creating an unavoidable internal tension between the two.

[0006] Therefore, the core technological challenge currently facing the field of myopia control optical lenses lies in how to ensure extremely clear visual quality in the central area while providing sufficient and effective myopia control optical signals in the peripheral areas, without sacrificing the performance of either. In other words, there is an urgent need for an optical design strategy that can effectively decouple central visual quality from peripheral control performance to overcome the performance bottleneck of existing uniform design schemes, thereby improving the effectiveness of myopia control and the user's visual comfort. Therefore, how to construct a myopia control lens and its design method that features zoned optical performance, with independently optimized optical characteristics in each region, and smooth visual transitions, has become a key challenge and a pressing technical problem for those skilled in the art. Summary of the Invention

[0007] The core of this invention lies in constructing a central optical zone, a peripheral optical zone, and a smooth transition zone with independently optimized optical properties on a single lens. This effectively decouples central visual acuity and peripheral myopia control, solving the technical problem that homogeneous design schemes in the prior art cannot simultaneously address central visual quality and peripheral myopia control. At the same time, the unique design method provides a systematic and precise approach to realizing this zoned optical lens. Through multi-parameter optimization and iterative simulation, the overall optical performance of the lens is ensured to meet clinical needs and the wearer's experience.

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A partitioned scattering optical lens for myopia control includes the following structure:

[0010] An optically transparent lens substrate;

[0011] A central optical region is located at the geometric center of the lens substrate, with a diameter ranging from 4.0 mm to 8.0 mm. The optical scattering coefficient of the central optical region is less than 0.1, and the modulation transfer function value at a spatial frequency of 30 cycles / mm is greater than 0.6.

[0012] A peripheral optical region, in a ring-shaped structure, surrounds the central optical region and extends to the edge region of the lens substrate. The optical scattering coefficient of the peripheral optical region is higher than 0.5, and the modulation transfer function value at a spatial frequency of 30 cycles / mm is lower than 0.2.

[0013] A smooth transition zone, in the form of a ring, is positioned between the central optical region and the peripheral optical region, providing a continuous gradient in the scattering coefficient from the central optical region to the peripheral optical region.

[0014] Furthermore, the lens substrate is made of ophthalmic grade optical materials; the refractive index of the lens substrate is 1.49 to 1.67, the Abbe number is not less than 30, and the light transmittance is not less than 98% in the visible light spectrum; the lens substrate has a front surface and a rear surface, and the central optical zone, the peripheral optical zone, and the smooth transition zone can be set on the front surface and the rear surface of the lens substrate or simultaneously on the front surface and the rear surface.

[0015] Furthermore, the central optical region adopts an aspherical or freeform surface design, and the surface of the central optical region is a smooth optical surface. The smooth optical surface adopts either of the following two design methods: 1. It does not contain any microstructures for actively scattering light; 2. It only contains nanoscale pseudo-random textures with a height or depth of less than 10 nanometers, wherein the average period of the pseudo-random texture is less than the wavelength of visible light.

[0016] Furthermore, the peripheral optical zone contains a regularly arranged array of microlenses. The microlens array is used to induce a preset amount of myopic defocus signal in the peripheral retina. The types of microlens arrays include spherical microlenses, aspherical microlenses, or annular microlenses. The average diameter of the microlens array ranges from 20 micrometers to 200 micrometers, the average height or depth ranges from 5 micrometers to 50 micrometers, and the center-to-center spacing of the microlens array ranges from 50 micrometers to 300 micrometers. The layout of the microlens array is a hexagonal close-packed array or a square grid array. The refractive power of the microlens array is designed to induce myopic defocus in the peripheral retina within the range of +1.5 diopters to +4.0 diopters. The density of the microlens array in the peripheral optical zone is higher than 200 microlenses / square millimeter.

[0017] Furthermore, the width of the smooth transition band ranges from 0.5 mm to 2.0 mm; the smooth transition band achieves a smooth transition of the scattering coefficient through a continuous gradual change in microstructure parameters, including the height, diameter, curvature, density, or a combination thereof of the microlens array.

[0018] Within the smooth transition zone, the height of the microlens array continuously increases from near zero near the central optical region to a set value near the peripheral optical region; the density of the microlens array continuously increases from a sparse or zero distribution near the central optical region to a high-density distribution near the peripheral optical region; the radius of curvature of the microlens array continuously decreases from a larger value near the central optical region to a smaller value near the peripheral optical region; the scattering coefficient of the smooth transition zone continuously and monotonically increases from below 0.1 to above 0.5; the modulation transfer function value of the smooth transition zone continuously and monotonically decreases from above 0.6 to below 0.2 at a spatial frequency of 30 cycles / mm; and the defocusing amount of the smooth transition zone continuously and monotonically increases from 0 diopter to the range of +1.5 diopter to +4.0 diopter.

[0019] A method for designing a partitioned scattering optical lens for myopia control, and for manufacturing the aforementioned partitioned scattering optical lens, includes the following steps:

[0020] Step 1: Obtain the wearer's basic ocular parameters and refractive data;

[0021] Step 2: Define the optical performance targets of the central optical region. Set the effective diameter range of the central optical region to 4.0 mm to 8.0 mm, set the modulation transfer function value of the central optical region at a spatial frequency of 30 cycles / mm to be no less than 0.6, and set the optical scattering coefficient to be no more than 0.1. Design the central optical region as a smooth optical surface.

[0022] Step 3: Define the optical performance target of the peripheral optical zone. Set the peripheral optical zone to surround the central optical zone, with an optical scattering coefficient target value of not less than 0.5 and a modulation transfer function value of not more than 0.2 at a spatial frequency of 30 cycles / mm. Set the peripheral optical zone to induce myopic defocus in the peripheral retina within the range of +1.5 diopters to +4.0 diopters by introducing a microlens array.

[0023] Step 4: Design the parameters of the microlens array in the peripheral optical zone. The average diameter of the microlens array ranges from 20 micrometers to 200 micrometers, the average height or depth ranges from 5 micrometers to 50 micrometers, and the center-to-center spacing ranges from 50 micrometers to 300 micrometers.

[0024] Step 5: Design the gradient parameters of the microlens array within the smooth transition zone, set the width of the smooth transition zone to be in the range of 0.5 mm to 2.0 mm, and select a gradient function to describe the spatial distribution of at least one of the height or density of the microlens array.

[0025] Step 6: Construct a three-dimensional optical model and perform optical performance simulation. Input the optical power of the lens substrate and the geometric and optical parameters of the central optical zone, peripheral optical zone and smooth transition zone into the optical design software. Simulate the light propagation path through ray tracing and calculate the modulation transfer function, point spread function, optical defocusing amount and scattering coefficient of the lens at different spatial frequencies.

[0026] Step 7: Iteratively optimize based on the simulation results obtained in Step 6, and evaluate whether the preset requirements for central visual acuity, peripheral myopia control defocus, and visual comfort are met. If not, adjust the geometric parameters, microstructure parameters, and gradient function of the central optical zone, peripheral optical zone, or smooth transition zone, and repeat Step 6 until all performance targets are met.

[0027] Step 8: Generate manufacturing data. Based on the final determined optical design parameters, generate CNC machining instructions, photolithography mask layouts, or mold design documents for lens manufacturing.

[0028] Furthermore, the basic ocular parameters in step one include axial length, corneal curvature, anterior chamber depth, lens thickness, and pupil diameter, while the refractive data includes the wearer's spherical power, cylindrical power, and axis.

[0029] Furthermore, the basic ocular parameters in step one also include wavefront aberration data of the eyeball. The wavefront aberration data is acquired through a Hartmann-Shack wavefront sensor and used to guide the design of the freeform or aspherical surface of the lens substrate.

[0030] Furthermore, in step four, the microlens array is arranged in a hexagonal close-packed array, and the material of the microlens array is the same as that of the lens substrate.

[0031] Furthermore, in step five, the gradient function is a cubic polynomial function or a sigmoid function. The height of the microlens array continuously increases from zero or near zero near the boundary of the central optical area to a set value near the boundary of the peripheral optical area. The density of the microlens array continuously increases from zero or near zero near the boundary of the central optical area to a set value near the boundary of the peripheral optical area.

[0032] Further methods for measuring or simulating the optical scattering coefficient include: using an optical scattering measurement system to measure the backscattering intensity of the lens at a wavelength of 550 nanometers and converting it into a scattering coefficient.

[0033] Furthermore, the measurement or simulation methods for the modulation transfer function include: using optical quality assessment methods, measuring or simulating the modulation transfer function values ​​at a spatial frequency of 30 cycles / mm in three regions: the central optical region, the peripheral optical region, and the smooth transition zone, respectively. The calculation of the modulation transfer function values ​​is based on the Fourier transform of the point spread function or the line spread function.

[0034] Compared with the prior art, the advantages of this invention are:

[0035] This solution effectively decouples central visual acuity from peripheral myopia control by constructing independently optimized central, peripheral, and smooth transition zones on a single lens. The central optical zone, with its extremely low scattering coefficient and high MTF value, ensures a high-definition experience for the wearer during fine visual activities. The peripheral optical zone, through the introduction of a microlens array with specific parameters, generates a preset myopic defocus signal on the peripheral retina, effectively suppressing excessive axial elongation. The smooth transition zone, through continuous and gradual changes in microstructural parameters, ensures a smooth and imperceptible visual transition from the center to the periphery, greatly improving wearing comfort and compliance. During the design process, multi-parameter optimization and iterative simulation ensured that the overall optical performance of the lens met clinical needs and the wearer's experience. This solution overcomes the limitations of traditional uniform designs, providing an innovative and efficient technical solution for myopia control. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the optical lens of the present invention. Figure 1 ;

[0037] Figure 2 This is a schematic diagram of the structure of the optical lens of the present invention. Figure 2 ;

[0038] Figure 3 This is a schematic diagram of the microlens array in the peripheral optical region of the present invention;

[0039] Figure 4 This is a schematic diagram illustrating the gradual change of microlens array parameters within the smooth transition zone of the present invention.

[0040] Figure 5 This is a flowchart of the design method of the present invention;

[0041] Figure 6 This is a data comparison diagram between embodiments and comparative examples of the present invention.

[0042] Explanation of the labels in the diagram:

[0043] 1. Lens substrate; 2. Central optical zone; 3. Peripheral optical zone; 4. Smooth transition zone; 5. Microlens array; 6. Front surface; 7. Back surface. Detailed Implementation

[0044] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0045] Please see Figure 1A partitioned scattering optical lens for myopia control includes an optically transparent lens substrate 1. A central optical zone 2 is provided at the geometric center of the lens substrate 1. The central optical zone 2 is circular. A peripheral optical zone 3 is provided around the outside of the central optical zone 2. The peripheral optical zone 3 has a ring structure and extends to the edge of the lens substrate 1. A smooth transition zone 4 is cleverly provided between the central optical zone 2 and the peripheral optical zone 3. The smooth transition zone 4 also has a ring structure. Its main function is to achieve a continuous and gradual change in optical characteristics from the central optical zone 2 to the peripheral optical zone 3.

[0046] like Figure 2 As shown, the lens substrate 1 has a front surface 6 and a rear surface 7. The partitioned scattering structure formed by the central optical zone 2, the peripheral optical zone 3, and the smooth transition zone 4 can be set on the front surface 6, the rear surface 7, or both, of the lens substrate 1, depending on actual design requirements and manufacturing process limitations. For example, in a typical design, the partitioned scattering structure can be integrally formed on the front surface 6 of the lens substrate 1 to optimize wearing comfort and simplify the manufacturing process.

[0047] In a preferred embodiment of the present invention, the lens substrate 1 is made of ophthalmic-grade optical materials to ensure excellent biocompatibility and optical transparency. A wide range of materials can be selected, including but not limited to polymethyl methacrylate (PMMA), diethylene glycol dipropylene carbonate (CR-39), polycarbonate (PC), or high-refractive-index hydrogel materials. PMMA is known for its excellent optical clarity, hardness, and dimensional stability, and is commonly used in rigid gas permeable lenses or high-precision optical components. CR-39 is a common choice for eyeglass lens manufacturing due to its lightweight, impact resistance, and excellent Abbe number. Polycarbonate is known for its extremely high impact resistance and is suitable for scenarios with high safety requirements. High-refractive-index hydrogel materials are commonly used in soft contact lenses; their high oxygen permeability, softness, and hydrophilicity significantly improve wearing comfort. The refractive index of the lens substrate 1 can be set between 1.49 and 1.67. Materials within this range can provide suitable lens thickness and curvature designs for different refractive powers, while optimizing optical performance. For example, materials with a refractive index of 1.56 are commonly used for moderate refractive correction. The material has an Abbe number of at least 30 to effectively control dispersion and ensure visual clarity. Within the visible light spectrum (380 nm to 780 nm), the transmittance of the lens substrate 1 is at least 98%, ensuring sufficient light flux reaches the retina and avoiding brightness loss due to lens absorption. Furthermore, the lens substrate 1 is designed with a specific base curve and optical power according to the wearer's refractive error to achieve spherical, cylindrical, or more complex refractive correction functions.

[0048] The central optical zone 2 is designed to achieve a high modulation transfer function (MTF) and low scattering loss, ensuring high-resolution central vision for the wearer during fine visual activities such as reading and driving. The diameter of this central optical zone 2 ranges from 4.0 mm to 8.0 mm. Its size is determined by considering the wearer's average pupil diameter and the pupil dilation limit under different ambient lighting conditions, particularly the physiological dilation of the pupil at night. This ensures that light entering the pupil primarily passes through this high-resolution area under any lighting conditions, thus maintaining the clarity of core vision. The central optical zone 2 is designed to have an MTF greater than 0.6 at a spatial frequency of 30 cycles / mm (cpd), indicating that this area can accurately transmit subtle visual information with high contrast. Simultaneously, the optical scattering coefficient of this area is strictly controlled to below 0.1, meaning that very little light is scattered through this area, minimizing undesirable visual phenomena such as halos and glare.

[0049] In a preferred embodiment of the present invention, the surface of the central optical region 2 is designed as a smooth optical surface, the surface morphology of which does not contain any microstructures for actively scattering light. However, in certain specific embodiments, the surface may contain nanoscale pseudo-random textures with a height or depth of less than 10 nanometers. The introduction of these nanoscale pseudo-random textures is not for active scattering, but is intended to further reduce scattering loss and improve transmittance through surface energy modulation or anti-reflection / anti-reflection effects. The average period of the pseudo-random texture is typically smaller than the wavelength of visible light (e.g., less than 200 nanometers), thereby effectively avoiding diffraction effects or significant optical scattering, ensuring that the optical performance of this region is not affected. The central optical region 2, through precise surface design, such as aspherical or freeform surface design, minimizes higher-order aberrations and optimizes retinal imaging quality. Its root mean square (RMS) wavefront aberration is typically controlled to less than 0.05 micrometers at a pupil diameter of 5 mm. This extremely low wavefront aberration ensures that light can be highly focused on the retina, thereby providing excellent visual sharpness.

[0050] The peripheral optical zone 3 has a ring-shaped structure that surrounds the central optical zone 2 and extends to the edge region of the lens substrate 1. The core design objective of the peripheral optical zone 3 is to induce an effective peripheral myopic defocus signal, thereby suppressing excessive elongation of the axial length and achieving the purpose of myopia control. In this region, the optical scattering coefficient is designed to be higher than 0.5, which indicates that the region will produce significant light scattering, thus forming diffuse imaging. At the same time, the modulation transfer function (MTF) at a spatial frequency of 30 cycles / mm (cpd) is designed to be lower than 0.2, which further illustrates that the imaging quality in this region is intentionally reduced to generate an effective defocus signal.

[0051] In a preferred embodiment of the present invention, the peripheral optical region 3 includes a regularly arranged microlens array 5, such as... Figure 3 As shown, the microlens array 5 is the key structure for inducing peripheral myopic defocus signals. The microlens array 5 can be of various types, including spherical microlenses, aspherical microlenses, or annular microlenses, with the specific choice depending on the desired defocus distribution and manufacturing process. The average diameter of the microlens array 5 ranges from 20 micrometers to 200 micrometers, the average height or depth ranges from 5 micrometers to 50 micrometers, and the center-to-center spacing (i.e., array pitch) ranges from 50 micrometers to 300 micrometers. Precise control of these geometric parameters is crucial for achieving the desired defocus effect. The microlens array 5 can be arranged in a hexagonal close-packed array or a square grid array, with the hexagonal close-packed array typically providing higher fill density and more uniform optical effects. The refractive power of the microlens array 5 is carefully designed to induce myopic defocus in the peripheral retina within the range of +1.5 to +4.0 diopters, effectively inhibiting axial elongation. Defocus within this range has been clinically proven to have a significant effect on myopia control. The microlens array 5 within the peripheral optical zone 3 has a density exceeding 200 lenses per square millimeter. This high-density, high-curvature microlens array 5 can locally converge and scatter incident light rays, forming diffuse optical images on the peripheral retina, thereby providing the eye with biological signals to inhibit myopia progression. The design parameters of the peripheral optical zone 3 were optimized through simulation using an ocular biological model that considered the eye's anatomical structure, optical characteristics, and physiological response mechanisms to ensure that the intensity, spatial frequency, and distribution characteristics of the generated defocus signal conform to the biological mechanisms of myopia control.

[0052] The smooth transition zone 4 has a ring-shaped structure and is located between the central optical zone 2 and the peripheral optical zone 3. The core function of the smooth transition zone 4 is to provide a continuous gradient of the scattering coefficient from the central optical zone 2 to the peripheral optical zone 3 in order to avoid visual abrupt changes and ensure visual comfort. The width of the smooth transition zone 4 ranges from 0.5 mm to 2.0 mm. This width is optimized to provide sufficient gradient space without taking up too much lens area.

[0053] In a preferred embodiment of the present invention, the smooth transition band 4 achieves a smooth transition of the scattering coefficient through a continuous and gradual change in microstructure parameters. These microstructure parameters may include the height, diameter, curvature, density, or a combination thereof of the microlens. Specifically, for example... Figure 4As shown, within the smooth transition zone 4, the height of the microlens can continuously increase from a near-zero value near the central optical zone 2 to a set value near the peripheral optical zone 3. Alternatively, the density of the microlens can continuously increase from a sparse or zero distribution near the central optical zone 2 to a high-density distribution near the peripheral optical zone 3. Furthermore, the radius of curvature of the microlens can continuously decrease from a larger value near the central optical zone 2 to a smaller value near the peripheral optical zone 3. The gradient functions of these parameters can be in various mathematical forms, such as linear functions, quadratic functions, power functions, sigmoid functions, or polynomial functions. Among these, cubic polynomial functions or sigmoid functions are often used to achieve a smoother and more natural transition. The gradient function, through precise control of microstructure size and spatial arrangement, ensures that the wearer does not perceive obvious visual boundaries when scanning, thus maintaining good visual comfort and treatment compliance. The scattering coefficient of the smooth transition zone 4 continuously and monotonically increases from below 0.1 to above 0.5 within the transition area. At the same time, the MTF value of the smooth transition zone 4 continuously and monotonically decreases from above 0.6 to below 0.2 at a spatial frequency of 30 cycles / mm (cpd). Correspondingly, the defocus amount of the smooth transition zone 4 continuously and monotonically increases from 0 diopter to +1.5 diopter to +4.0 diopter, thus achieving a seamless transition from clear central vision to effective peripheral defocus.

[0054] This invention also provides a design method for a partitioned scattering optical lens for myopia control. This method ensures the precise realization of the lens's optical performance through systematic steps. Please refer to [link to relevant documentation]. Figure 5 The design method includes the following steps:

[0055] Step 1: Obtain the wearer's basic ocular parameters and refractive data;

[0056] This step forms the basis for personalized lens design. Basic ocular parameters include, but are not limited to, axial length, corneal curvature (such as K-value), anterior chamber depth, lens thickness, and pupil diameter. These parameters are precisely measured using ophthalmic diagnostic equipment (such as IOLMaster 700 or Pentacam). Refractive data includes the wearer's spherical power, cylindrical power, and axis, which are obtained through the optometry and lens fitting process. Furthermore, to achieve a higher level of personalized aberration correction, wavefront aberration data of the eyeball can also be obtained in this step. Wavefront aberration data is measured using a Hartmann-Shack wavefront sensor and expressed in Zernike coefficients. This wavefront aberration data will be directly used to guide the freeform or aspherical design of the lens substrate 1 to ensure that while correcting refractive errors, the impact of higher-order aberrations on retinal clarity is minimized, especially in the central optical zone 2.

[0057] Step 2: Define the optical performance targets for the central optical region 2;

[0058] Based on the wearer's average pupil diameter obtained in step one and the actual need for fine vision, the effective diameter range of the central optical zone 2 is set to 4.0 mm to 8.0 mm. This diameter is usually slightly larger than the wearer's pupil diameter under normal lighting to accommodate slight pupil movements and changes in ambient light. The target value of the modulation transfer function (MTF) of the central optical zone 2 at a spatial frequency of 30 cycles / mm (cpd) is set to be no less than 0.6 to ensure sufficient contrast and detail resolution. At the same time, the target value of the optical scattering coefficient is set to be no higher than 0.1 to minimize light scattering and improve visual clarity. In this design, the central optical zone 2 is defined as a smooth optical surface that does not contain any microstructures for active scattering, which is consistent with the low scattering coefficient target.

[0059] Step 3: Define the optical performance targets for peripheral optical region 3;

[0060] The peripheral optical zone 3 is set to surround the central optical zone 2, with a target optical scattering coefficient of not less than 0.5 to ensure sufficient diffuse light for the formation of peripheral defocus signals. The target MTF value at a spatial frequency of 30 cycles / mm (cpd) is set to not more than 0.2 to further confirm that the imaging quality of this area is lower than that of the central optical zone 2, which helps to generate effective myopic defocus. The peripheral optical zone 3 is set to induce myopic defocus in the peripheral retina within the range of +1.5 diopters to +4.0 diopters by introducing a microstructure array. This defocus amount is an effective myopia control range determined based on biological research results and clinical experience.

[0061] Step 4: Design the microstructure parameters of the peripheral optical region 3;

[0062] In this step, microlenses are selected as the microlens array 5. The geometric parameters of the microlenses are precisely set: the average diameter ranges from 20 micrometers to 200 micrometers, the average height or depth ranges from 5 micrometers to 50 micrometers, and the center-to-center spacing ranges from 50 micrometers to 300 micrometers. The layout of the microlens array 5 is preferably a hexagonal close-packed array to achieve optical uniformity and efficiency. The material of the microlenses is the same as that of the lens substrate 1, which simplifies the manufacturing process and ensures the uniformity of the materials. In order to accurately control the induced defocus, the radius of curvature, center thickness, and refractive index difference between the microlenses and the lens substrate material need to be calculated precisely. For example, for a substrate material with a refractive index of 1.56, if the goal is to produce a peripheral defocus of +3.0D, the equivalent refractive power of a single microlens and its cumulative effect in the array need to be verified by optical simulation.

[0063] Step 5: Design the microstructure gradient parameters for smooth transition zone 4;

[0064] The width of the smooth transition zone 4 is set to range from 0.5 mm to 2.0 mm. A suitable gradient function (e.g., a cubic polynomial function, a sigmoid function, or an exponential function) is selected to describe the spatial distribution of the microlens height and / or density. The height of the microlens increases continuously from zero (or near zero, e.g., less than 1 μm) near the boundary of the central optical region 2 to a set value (e.g., 20 μm) near the boundary of the peripheral optical region 3. Simultaneously, the density of the microlenses increases continuously from zero distribution (or sparse distribution, e.g., 50 microlenses / mm²) at the boundary of the central optical region 2 to a high-density distribution (e.g., 300 microlenses / mm²) at the boundary of the peripheral optical region 3. These gradient functions, through precise control, ensure that the scattering coefficient, MTF value, and defocus amount within the smooth transition zone 4 all achieve a continuous and monotonous gradient, thereby avoiding visual discomfort. For example, a cubic polynomial function can well simulate the smooth increase of the microlens height, which can be expressed as h(r) = A * (r / W)^3 + B * (r / W)^2 + C * (r / W) + D, where r W is the distance to the boundary of the central region, A, B, C, and D are undetermined coefficients, which are determined by boundary conditions (e.g., the height is h_start at r=0, the height is h_end at r=W, and the gradient is continuous at the boundary).

[0065] Step Six: Construct a three-dimensional optical model and perform optical performance simulation;

[0066] The optical power of the lens substrate 1, the geometric and optical parameters of the central optical zone 2, the peripheral optical zone 3, and the smooth transition zone 4 are input into professional optical design software, such as Zemax OpticStudio, Code V, or LightTools. In the simulation environment, a precise three-dimensional geometric model of the entire lens is constructed, including the precise shape and spatial position of each microlens. Ray tracing is performed on incident rays at different field angles (e.g., 0 degrees, 10 degrees, 20 degrees, 30 degrees) to simulate the propagation path of light within the lens and its imaging characteristics on the retina. During the simulation, the ray tracing algorithm considers the refractive index, Abbe number, and diffraction and scattering effects caused by the microstructure of the lens material. It calculates the modulation transfer function (MTF), point spread function (PSF), optical defocusing amount, and scattering coefficient of the lens at different spatial frequencies. For example, MTF curves can be calculated separately for the central and peripheral field of view, and the shape and size of the PSF can be analyzed to evaluate image quality and defocusing effect.

[0067] Step 7: Perform iterative optimization based on simulation results;

[0068] The optical performance data obtained in step six is ​​analyzed in depth to assess whether it meets the preset requirements for central visual acuity, peripheral myopia control defocus, and visual comfort. For example, if the MTF value of the central optical zone 2 is lower than the target, it may be necessary to adjust its surface aspheric coefficient or nanotexture parameters; if the defocus of the peripheral optical zone 3 is insufficient, it may be necessary to increase the height or curvature of the microlens; if the MTF or scattering coefficient of the smooth transition zone 4 is discontinuous, the wearer may perceive a visual jump, in which case the type or parameters of the gradient function need to be adjusted; if the evaluation results do not meet the standards, the geometric parameters, microstructure parameters, and gradient functions of the central optical zone 2, peripheral optical zone 3, or smooth transition zone 4 need to be carefully adjusted, and step six is ​​repeated until all performance targets are met. The iterative optimization process aims to find the best balance among multiple interrelated optical performance indicators through multivariate optimization algorithms (such as genetic algorithms, simulated annealing algorithms, or gradient descent methods), ultimately minimizing scattering and aberrations in the central region, maximizing the effective defocus signal in the peripheral region, and ensuring visual continuity through the smooth transition zone 4.

[0069] Step 8: Generate manufacturing data;

[0070] Based on the finalized optical design parameters, CNC machining instructions (such as G-code for ultra-precision diamond turning or freeform surface grinding), photolithographic mask layout files, or mold design files are generated for lens manufacturing. These data files precisely describe the geometry, size, and spatial position of all microstructures on the lens surface, and are key to achieving high-precision manufacturing. For example, in the ultra-precision diamond turning process, the G-code will precisely control the movement trajectory of the diamond tool on the lens mold, carving the gradient structure of the microlens array 5 and the smooth transition zone 4 with sub-nanometer precision.

[0071] The optical scattering coefficients of the central optical region 2 and the peripheral optical region 3 are measured using an optical scattering measurement system conforming to the international standard ISO 13666. The backscattering intensity of the lens at a wavelength of 550 nanometers (the central wavelength of visible light) is measured and converted into a scattering coefficient. This system typically includes a high-precision spectrometer, a tunable laser source, and a high-sensitivity detector, acquiring data through integrating sphere or angle-resolved scattering measurement techniques.

[0072] The method for measuring or simulating the modulation transfer function (MTF) is as follows: using the optical quality assessment method conforming to the international standard ISO 11979-9, the MTF value at a specific spatial frequency (e.g., 30 cycles / mm) is measured or simulated in designated areas of the lens (central optical zone 2 and peripheral optical zone 3). MTF measurement is usually accomplished by measuring the lens's imaging capability to a sinusoidal grating or edge response, and its value is calculated based on the Fourier transform of the point spread function (PSF) or line spread function (LSF).

[0073] As a preferred embodiment of the present invention, the accuracy of the design parameters of the smooth transition zone 4 can be further verified by computational fluid dynamics (CFD) or finite element analysis (FEA). For example, in ultraviolet nanoimprinting, FEA can simulate the flow and filling behavior of liquid resin in the mold microstructure to predict the degree of accurate replication of the microstructure geometry after curing. CFD analysis can be used to optimize the mold design, ensure uniform resin filling, and avoid air bubbles or insufficient filling. These analyses aim to ensure the accurate replication of the microstructure geometry and the stability of the surface morphology during lens material processing. The design method can also include biomechanical analysis of the wearer's head and eye movement patterns, for example, by collecting data through an eye-tracking system to analyze the rotation center and gaze point of the wearer's eyes under different visual fields, so as to consider the dynamic visual environment in the lens design, further optimize the optical performance under different visual fields, and ensure that the gaze always passes through the design area during eye movement and that the defocus signal is stable and effective.

[0074] As a preferred embodiment of the present invention, the manufacturing process of the microlens array 5 can be varied, including but not limited to ultra-precision diamond turning, ultraviolet nanoimprinting, interference lithography, or direct laser writing technology. Ultra-precision diamond turning technology uses CNC machine tools to precisely control the tool path and directly form the microlens array 5 on the mold surface or lens substrate. This method has high precision and is suitable for processing aspherical and free-form surface structures. Ultraviolet nanoimprinting technology imprints a mold containing a microstructure pattern onto a liquid resin coating under ultraviolet light irradiation. After the resin cures, a microstructure is formed. This method has high production efficiency and relatively low cost, and is suitable for large-scale production. Interference lithography technology forms periodic microstructures on photosensitive materials through the interference patterns of two or more coherent laser beams. It is suitable for manufacturing high-precision, large-area periodic structures. Direct laser writing technology scans the surface of photosensitive materials point by point or line by line with a focused laser beam to achieve precision processing of microstructures. Its advantage is high design flexibility, which can realize the manufacturing of arbitrarily complex structures, and is especially suitable for prototype development and small-batch production.

[0075] The technical solution and its effects of the present invention will be further illustrated below through specific embodiments and comparative examples:

[0076] Example 1: Partition scattering optical lens (this invention)

[0077] The parameters of the partitioned scattering optical lens constructed in this embodiment are designed as follows:

[0078] Lens base 1: CR-39 material is used, with a refractive index of 1.498, an Abbe number of 58, a visible light transmittance of 98.5%, a power of -3.00D spherical, and a base curve of 8.5mm;

[0079] Central optical region 2: The diameter is set at 6.0 mm, and the surface is designed as a smooth aspherical surface. Higher-order aberrations are reduced by optimizing the Zernike coefficient. The micro root mean square (RMS) wavefront aberration is controlled at 0.035 μm with a pupil diameter of 5 mm. This region does not contain active scattering microstructures. Its target optical performance is: MTF higher than 0.7 and optical scattering coefficient lower than 0.08 at a spatial frequency of 30 cycles / mm (cpd).

[0080] Peripheral optical zone 3: A ring-shaped structure extending from the boundary of the central optical zone 2 to a point 30 mm in lens diameter. This zone contains a microlens array 5, which uses aspherical microlenses with an average diameter of 80 μm, an average height of 25 μm, and a center-to-center spacing of 150 μm. It employs a hexagonal close-packed array layout. The refractive power of each microlens is designed to induce +3.0 diopters of myopic defocus in the peripheral retina. The microlens density is 462 microlenses / mm². The target optical performance for this zone is: an MTF below 0.15 and an optical scattering coefficient above 0.6 at a spatial frequency of 30 cycles / mm² (cpd).

[0081] Smooth transition zone 4: The width is set to 1.5 mm, located between the central optical zone 2 and the peripheral optical zone 3. The height and density of the microlens array 5 in the smooth transition zone 4 are gradually varied using a cubic polynomial function. The height of the microlens array 5 increases continuously from 0 micrometers (no microlenses) at the boundary of the central optical zone 2 to 25 micrometers at the boundary of the peripheral optical zone 3, and the density increases continuously from 0 microlenses / mm² at the boundary of the central optical zone to 462 microlenses / mm² at the boundary of the peripheral optical zone. In the smooth transition zone 4 region, the scattering coefficient increases continuously and monotonically from 0.08 to 0.6, the MTF decreases continuously and monotonically from 0.7 to 0.15, and the defocusing amount increases continuously and monotonically from 0 diopter to +3.0 diopter.

[0082] Comparative Example 1: Traditional Single-Focus Optical Lenses

[0083] This comparative example constructs a traditional single-focus optical lens, and its parameters are designed as follows:

[0084] Lens substrate: CR-39 material with a refractive index of 1.498, Abbe number of 58, and visible light transmittance of 98.5%. The lens power is designed as -3.00D spherical with a base curve of 8.5mm. The entire lens surface is designed as a smooth spherical or aspherical surface without any partitioning or microstructures to induce peripheral defocus. It aims to provide optimal central vision correction across the entire field of view. Its optical performance targets are: MTF above 0.7 and optical scattering coefficient below 0.1 at a spatial frequency of 30 cycles / mm (cpd).

[0085] Comparative Example 2: Uniform Multifocal Optical Lens

[0086] This comparative example constructs a uniform multifocal optical lens, and its parameters are designed as follows:

[0087] Lens substrate: CR-39 material with a refractive index of 1.498, Abbe number of 58, and visible light transmittance of 98.5%. The lens power is designed as -3.00D spherical with a base curve of 8.5mm. The entire lens area (including the center and periphery) is uniformly distributed with a microlens array 5 to generate a multifocal effect. The microlenses have an average diameter of 80 micrometers, an average height of 25 micrometers, and a center-to-center spacing of 150 micrometers. They are arranged in a hexagonal close-packed array with a density of 462 microlenses per square millimeter. Each microlens is designed to induce +3.0 diopters of myopic defocus in the peripheral retina. This design sacrifices some central visual acuity to achieve myopia control, but lacks a smooth transition. Its optical performance is as follows: both the central and peripheral areas exhibit MTF and scattering coefficients between those of the central and peripheral optical zones, with a uniform distribution of defocus.

[0088] To evaluate the performance of the above embodiments and comparative examples, we used the three-dimensional optical model and simulation method from step six to simulate the optical performance of the lens. The simulation results are as follows: Figure 6 As shown.

[0089] from Figure 6 The data shows that the zonal scattering optical lens provided in Example 1 maintains a high MTF value and low scattering coefficient in the central optical zone 2, similar to that of traditional monofocal lenses, ensuring excellent central visual acuity. Its RMS wavefront aberration is also controlled at an extremely low level. Compared with the uniform multifocal lens in Comparative Example 2, Example 1 has a significantly higher central MTF and lower scattering, which means that its central visual quality is better. In the peripheral optical zone 3, Example 1 successfully achieved a high scattering coefficient and low MTF, and induced a significant +3.1 diopter myopic defocus, which is in stark contrast to the defocus-free effect of traditional monofocal lenses and is superior to the performance of the uniform multifocal lens in Comparative Example 2 in terms of peripheral defocus intensity.

[0090] Of particular note is that the smooth transition zone 4 in Example 1 achieves a smooth transition of MTF, scattering coefficient, and defocus amount through continuous and gradual changes in microstructure parameters. This is not present in the traditional monofocal lens of Comparative Example 1. In contrast, in the uniform multifocal lens of Comparative Example 2, due to the lack of a dedicated transition design, its optical characteristics often exhibit nonlinearity and abrupt changes between different areas, which may cause the wearer to perceive visual discomfort or image jumps when scanning their eyes. The overall wearing comfort score of Example 1 is 8.5 points, which is slightly lower than that of the traditional monofocal lens but significantly higher than that of the uniform multifocal lens. This verifies the key role of the smooth transition zone 4 in improving the wearing experience.

[0091] In terms of simulating myopia progression suppression rate, Example 1 showed a suppression rate of 62%, significantly better than the 5% of traditional monofocal lenses (only the baseline of natural growth) and the 35% of uniform multifocal lenses. This indicates that the partitioned scattering optical lens designed in this invention, through precise control of central high definition, effective peripheral defocus, and smooth transition, achieves the goal of maximizing myopia control without sacrificing core visual quality. This simulation result is based on a bio-optical model, which takes into account parameters such as the intensity and spatial frequency distribution of peripheral retinal defocus signals and combines them with known biological mechanisms of axial elongation for prediction.

[0092] Therefore, the partitioned scattering optical lens and its design method for myopia control disclosed in this invention effectively decouple central visual acuity from peripheral myopia control by constructing a central optical zone 2, a peripheral optical zone 3, and a smooth transition zone 4 with independently optimized optical characteristics on a single lens. The central optical zone 2, with its extremely low scattering coefficient and high MTF value, ensures a high-definition experience for the wearer during fine visual activities. The peripheral optical zone 3, by introducing a microlens array 5 with specific parameters, generates a preset myopic defocus signal in the peripheral retina, thereby effectively suppressing excessive elongation of the axial length. The smooth transition zone 4, through continuous and gradual changes in microstructural parameters, ensures a smooth and imperceptible visual transition from the center to the periphery, greatly improving wearing comfort and compliance. The design method provides a systematic and precise approach to realizing this partitioned optical lens. Through multi-parameter optimization and iterative simulation, it ensures that the overall optical performance of the lens meets clinical needs and the wearer's experience. This solution breaks through the limitations of traditional uniform design and provides an innovative and efficient technical solution for the field of myopia prevention and control.

[0093] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A localized scattering optical lens for myopia control, characterized in that: Includes the following structure: An optically transparent lens substrate (1); A central optical region (2) is disposed in the geometric center region of the lens substrate (1), the diameter of which ranges from 4.0 mm to 8.0 mm, the optical scattering coefficient of the central optical region (2) is less than 0.1, and the modulation transfer function value at a spatial frequency of 30 cycles / mm is greater than 0.6; A peripheral optical region (3) is in a ring structure and surrounds the central optical region (2) and extends to the edge region of the lens substrate (1). The optical scattering coefficient of the peripheral optical region (3) is higher than 0.5 and the modulation transfer function value at a spatial frequency of 30 cycles / mm is lower than 0.

2. A smooth transition zone (4), in the form of a ring, is disposed between the central optical region (2) and the peripheral optical region (3), the smooth transition zone (4) providing a continuous gradient of the scattering coefficient from the central optical region (2) to the peripheral optical region (3); The peripheral optical zone (3) includes a regularly arranged microlens array (5), which is used to induce a preset amount of myopic defocus signal in the peripheral retina. The width of the smooth transition band (4) ranges from 0.5 mm to 2.0 mm; the smooth transition band (4) achieves a smooth transition of the scattering coefficient through a continuous gradual change of microstructure parameters, the microstructure parameters including the height, diameter, curvature, density or a combination thereof of the microlens array (5); Within the smooth transition zone (4), the height of the microlens array (5) continuously increases from a near-zero value near the central optical region (2) to a set value near the peripheral optical region (3), the density of the microlens array (5) continuously increases from a sparse or zero distribution near the central optical region (2) to a high-density distribution near the peripheral optical region (3), the radius of curvature of the microlens array (5) continuously decreases from a larger value near the central optical region (2) to a smaller value near the peripheral optical region (3), the scattering coefficient of the smooth transition zone (4) continuously and monotonically increases from below 0.1 to above 0.5, the modulation transfer function value of the smooth transition zone (4) continuously and monotonically decreases from above 0.6 to below 0.2 at a spatial frequency of 30 cycles / mm, and the defocus amount of the smooth transition zone (4) continuously and monotonically increases from 0 diopter to the range of +1.5 diopter to +4.0 diopter.

2. The partition scattering optical lens for myopia control according to claim 1, characterized in that: The lens substrate (1) is made of ophthalmic grade optical material; the refractive index of the lens substrate (1) is 1.49 to 1.67, the Abbe number is not less than 30, and the light transmittance is not less than 98% in the visible light spectrum; the lens substrate (1) has a front surface (6) and a rear surface (7), and the central optical area (2), the peripheral optical area (3) and the smooth transition zone (4) can be disposed on the front surface (6) and the rear surface (7) of the lens substrate (1) or simultaneously disposed on the front surface (6) and the rear surface (7).

3. A partitioned scattering optical lens for myopia control according to claim 1, characterized in that: The central optical region (2) adopts an aspherical or freeform surface design. The surface of the central optical region (2) is a smooth optical surface. The smooth optical surface adopts either of the following two design methods:

1. It does not contain any microstructures for active scattering of light; 2. It only contains nanoscale pseudo-random textures with a height or depth of less than 10 nanometers, wherein the average period of the pseudo-random texture is less than the wavelength of visible light.

4. A partitioned scattering optical lens for myopia control according to claim 1, characterized in that: The microlens array (5) includes spherical microlenses, aspherical microlenses, or annular microlenses. The average diameter of the microlens array (5) ranges from 20 micrometers to 200 micrometers, the average height or depth ranges from 5 micrometers to 50 micrometers, and the center-to-center spacing of the microlens array (5) ranges from 50 micrometers to 300 micrometers. The layout of the microlens array (5) is a hexagonal close-packed array or a square grid array. The refractive power of the microlens array (5) is designed to induce myopic defocus in the peripheral retina within the range of +1.5 diopters to +4.0 diopters. The density of the microlens array (5) in the peripheral optical zone (3) is higher than 200 per square millimeter.

5. A method for designing a localized scattering optical lens for myopia control, used to manufacture the localized scattering optical lens as described in claim 1, characterized in that: Includes the following steps: Step 1: Obtain the wearer's basic ocular parameters and refractive data; Step 2: Define the optical performance target of the central optical region (2), set the effective diameter range of the central optical region (2) to be 4.0 mm to 8.0 mm, set the modulation transfer function value of the central optical region (2) at a spatial frequency of 30 cycles / mm to be no less than 0.6, and set the optical scattering coefficient to be no more than 0.1, and design the central optical region (2) as a smooth optical surface; Step 3: Define the optical performance target of the peripheral optical zone (3), set the peripheral optical zone (3) to surround the central optical zone (2), set the optical scattering coefficient target value to be not less than 0.5, and the modulation transfer function value at a spatial frequency of 30 cycles / mm to be not more than 0.2, and set the peripheral optical zone (3) to induce myopic defocus in the peripheral retina in the range of +1.5 diopters to +4.0 diopters by introducing a microlens array (5); Step 4: Design the parameters of the microlens array (5) in the peripheral optical zone (3). The average diameter of the microlens array (5) ranges from 20 micrometers to 200 micrometers, the average height or depth ranges from 5 micrometers to 50 micrometers, and the center-to-center spacing ranges from 50 micrometers to 300 micrometers. Step 5: Design the gradient parameters of the microlens array (5) within the smooth transition zone (4), set the width of the smooth transition zone (4) to be between 0.5 mm and 2.0 mm, and select a gradient function to describe the spatial distribution of at least one of the height or density of the microlens array (5). Step 6: Construct a three-dimensional optical model and perform optical performance simulation. Input the optical power of the lens substrate (1) and the geometric and optical parameters of the central optical area (2), the peripheral optical area (3) and the smooth transition zone (4) into the optical design software. Simulate the light propagation path by ray tracing and calculate the modulation transfer function, point spread function, optical defocusing amount and scattering coefficient of the lens at different spatial frequencies. Step 7: Iteratively optimize based on the simulation results obtained in Step 6, and evaluate whether the preset requirements for central visual acuity, peripheral myopia control defocus and visual comfort are met. If not, adjust the geometric parameters, microstructure parameters and gradient functions of the central optical zone (2), peripheral optical zone (3) or smooth transition zone (4), and repeat Step 6 until all performance targets are met. Step 8: Generate manufacturing data. Based on the final determined optical design parameters, generate CNC machining instructions, photolithography mask layouts, or mold design documents for lens manufacturing.

6. The design method of a partitioned scattering optical lens for myopia control according to claim 5, characterized in that: The basic ocular parameters in step one include axial length, corneal curvature, anterior chamber depth, lens thickness, and pupil diameter. The refractive data includes the wearer's spherical power, cylindrical power, and axis.

7. The design method of a partitioned scattering optical lens for myopia control according to claim 5, characterized in that: The basic eye parameters in step one also include wavefront aberration data of the eyeball, which is acquired by a Hartmann-Shack wavefront sensor and used to guide the freeform or aspherical design of the lens substrate (1).

8. The design method of a partitioned scattering optical lens for myopia control according to claim 5, characterized in that: In step four, the microlens array (5) is arranged in a hexagonal close-packed array, and the material of the microlens array (5) is the same as that of the lens substrate (1).

9. The design method of a partitioned scattering optical lens for myopia control according to claim 5, characterized in that: In step five, the gradient function is a cubic polynomial function or a Sigmoid function. The height of the microlens array (5) increases continuously from zero or near zero near the boundary of the central optical region (2) to a set value near the boundary of the peripheral optical region (3). The density of the microlens array (5) increases continuously from zero or near zero near the boundary of the central optical region (2) to a set value near the boundary of the peripheral optical region (3).

10. The design method of a partitioned scattering optical lens for myopia control according to claim 5, characterized in that: The method for measuring or simulating the optical scattering coefficient includes: using an optical scattering measurement system to measure the backscattering intensity of the lens at a wavelength of 550 nanometers and converting it into a scattering coefficient.

11. The design method of a partitioned scattering optical lens for myopia control according to claim 5, characterized in that: The method for measuring or simulating the modulation transfer function includes: using an optical quality assessment method, measuring or simulating the modulation transfer function value at a spatial frequency of 30 cycles / mm in the three regions of the central optical region (2), the peripheral optical region (3), and the smooth transition zone (4), respectively, and the calculation of the modulation transfer function value is based on the Fourier transform of the point spread function or the line spread function.

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