Scattered optical lens

Abstract

The invention discloses a scattering optical lens applied to the technical field of optics, the inherent contradiction between the central vision definition and the peripheral myopia control efficiency is successfully decoupled by realizing the spatial programmability of the scattering characteristic on the lens, and the lens can be used for improving the vision definition and the peripheral myopia control efficiency according to the specific vision requirement of a user. Scattering units with low scattering intensity and narrow scattering angle distribution are densely arranged in a central vision area, so that high-resolution visual quality and contrast are ensured, and glare and visual discomfort are avoided. Meanwhile, scattering units with high scattering intensity, wide scattering angle distribution or a specific phase modulation function are arranged in the peripheral area, so that accurate myopia defocus signals are effectively induced on peripheral retinas or the imaging contrast ratio is greatly reduced, the myopia control effect is maximized, a regionalized optical intervention mode is adopted, and the myopia control precision is improved. The optical efficiency and the treatment effect of myopia control are remarkably improved, and meanwhile the visual comfort of a wearer is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of optical technology, and in particular to a scattering optical lens. Background Technology

[0002] Myopia, a growing global public health challenge, has a high incidence rate and is accompanied by complications such as retinal degeneration, glaucoma, and cataracts, all of which can cause irreversible damage to visual function, seriously affecting individual health and social development. Therefore, slowing the progression of myopia has become a core issue of common concern in ophthalmology and optical engineering. In recent years, optical intervention strategies based on peripheral retinal defocus theory and contrast control theory have been widely recognized as key means of effectively managing myopia progression. Among these, contrast control lenses, which cleverly introduce optical scattering elements into spectacle lenses to reduce the contrast of retinal imaging and thus send a deceleration signal to the eye's visual axis growth mechanism, have become a promising non-invasive correction and control solution. This technology, to some extent, alleviates the predicament of traditional monofocal corrective lenses in effectively controlling myopia progression, providing a new intervention approach for children and adolescents with myopia.

[0003] Currently, contrast control lenses on the market, such as those using microlens arrays (MLAs) or diffractive optical elements (DOEs) as the main scattering structure, generally follow a principle of homogenization in their design. Specifically, all optical microstructure units on these lenses, regardless of their location within the lens, are designed to be completely identical in geometry, size parameters, and the optical functions they perform. In its early stages, this design strategy undoubtedly greatly simplified the complexity of the manufacturing process, reduced production costs, and facilitated large-scale standardized production, thereby promoting the market penetration of these lenses. Their basic working principle is to uniformly introduce optical scattering to form a diffuse light field on the retina, thereby reducing overall image contrast and inducing a slowdown in axial elongation. Under the technological conditions at the time, this unified, global optical scattering intervention did indeed provide a preliminary and effective solution for the field of myopia control.

[0004] However, with the continuous development of related technologies and a deeper understanding of the physiological mechanisms of human vision, especially with the increasingly stringent dual requirements of clinical practice for both myopia control effectiveness and user visual comfort, some inherent characteristics of the aforementioned homogeneous scattering schemes at the principle level have gradually revealed their fundamental limitations and deep contradictions when facing new challenges. The core issue lies in the fact that this "one-size-fits-all" homogeneous scattering design fails to fully consider the significant physiological differences and dynamic adaptive needs of the human visual system in different regions. Therefore, in pursuing a single performance goal, it inevitably falls into an irreconcilable dilemma of performance trade-offs. Specifically, to ensure that the clarity of the user's central visual area is not significantly affected, the intensity and density of the scattering elements must be strictly limited to a relatively low level. This directly leads to insufficient myopia control signal intensity received by the peripheral retina, thereby weakening the overall myopia control effectiveness. Conversely, if the scattering intensity is deliberately increased in order to maximize the myopia control effect in the peripheral area, the central vision area will suffer from obvious image blurring, decreased contrast, and even negative effects such as glare and visual discomfort. This not only seriously damages the user's visual quality and daily wearing experience, but may also lead to reduced compliance, rendering the myopia control lenses ineffective.

[0005] At a deeper level, the underlying contradiction exposed by this homogenized design lies in the fundamental, insurmountable conflict between its static, uniform, and impersonal optical intervention mode and the complex, dynamic, and highly personalized visual physiological mechanisms of the human eye. Different regions of the human retina exhibit significant differences in sensitivity to optical signals: the fovea is extremely sensitive to high spatial frequency information and subtle contrast changes, bearing the core function of high-resolution vision; while the peripheral retina is more responsive to low spatial frequency defocus signals, especially those used to regulate axial elongation. Existing uniform scattering lenses, due to their indiscriminate optical action, cannot precisely modulate the optical signal to address these subtle, regionalized physiological characteristics. They cannot generate optimized and effective myopia control signals in the peripheral region without sacrificing central vision, significantly reducing the efficiency of optical intervention. Simultaneously, individual differences among users, including pupil size, accommodative ability, axial length, and even retinal sensitivity topography, as well as their dynamic demands on lens optical performance under different visual tasks (such as distance observation and near reading), all place higher demands on the personalized, adaptive optical performance of lenses. Homogeneous scattering designs lack inherent flexibility and spatial programmability, failing to provide truly personalized solutions for diverse user groups and hindering dynamic optimization of optical performance in different scenarios. Consequently, their therapeutic effects and user experience remain suboptimal. Therefore, this homogeneous design, stemming from manufacturing convenience, fundamentally restricts further improvements in optical efficiency, visual quality, and personalized adaptability of myopia control lenses.

[0006] Therefore, how to overcome the inherent limitations of existing homogeneous scattering lenses and develop a technical paradigm that can achieve spatial programmability of scattering characteristics on a single lens to accurately match the heterogeneity and individual differences of the human visual system, thereby significantly improving the peripheral myopia control effect while ensuring excellent central visual quality, has become a key challenge and an urgent technical problem for those skilled in the art. Summary of the Invention

[0007] The core of this invention lies in strategically arranging different types of scattering units at different spatial positions in the scattering unit array to construct a preset, non-uniform scattering field distribution, thereby achieving fine, regionalized modulation of the light wavefront across the entire field of view of the lens, thus overcoming the inherent limitations of homogeneous scattering lenses in the prior art.

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

[0009] A scattering optical lens includes an optically transparent lens substrate and an array of scattering units formed on or inside the lens substrate. The scattering unit array consists of multiple scattering units that are identical in macroscopic geometry, arranged in a periodic or aperiodic manner. The multiple scattering units are divided into N types, where N is an integer greater than or equal to 2. Scattering units of the same type have the same microscopic optical structure, while scattering units of different types have different microscopic optical structures. Each microscopic optical structure is precisely customized to give its scattering unit a specific scattering characteristic, including at least one of scattering angle distribution, scattering intensity, and phase modulation function. Multiple scattering characteristics are predefined in a scattering characteristic library. By strategically arranging different types of scattering units at different spatial positions in the scattering unit array, a pre-defined, non-uniform scattering field distribution is constructed to achieve fine, localized modulation of the light wavefront across the entire field of view of the lens.

[0010] The design method for scattering optical lenses includes the following steps: Step 1: Obtain personalized ophthalmological data for the target user; Step 2: Based on personalized ophthalmological data, calculate the ideal scattered field distribution required across the entire lens field of view; Step 3: Select N basic scattering properties from the preset scattering property library, and design the corresponding microscopic optical structure for each property; Step 4: Map the ideal scattering field distribution onto the scattering unit array to generate a unit array spectrum; Step 5: Based on the unit arrangement spectrum and the corresponding microscopic optical structure design parameters, manufacture the lens. The specific manufacturing process includes the following steps: Step 51, Master mold manufacturing: Using high-precision micro-nano fabrication technology, based on the microscopic optical structure parameters of each scattering unit specified in the unit arrangement spectrum, a precision master mold containing a complete scattering unit array structure is manufactured. Step 52, Lens substrate molding and array replication: Through precision injection molding or casting molding technology, the microscopic optical structure array on the master mold is replicated with high fidelity onto the optically transparent lens substrate material; Step 53, Surface Treatment and Inspection: Multi-layer optical coating treatment is performed on the lens surface to reduce the average reflectivity in the visible light band to below 0.5%, thereby reducing surface reflection and increasing light transmittance; Step 54. Finally, the prepared lens is subjected to rigorous optical performance testing, including but not limited to transmittance testing, PSF / MTF testing, scattering angle distribution testing, and verification of the microscopic optical structure morphology by optical microscopy or atomic force microscopy to ensure that its size, depth and uniformity meet the design requirements.

[0011] Furthermore, the optically transparent lens substrate is made of a polymer optical material with a refractive index between 1.50 and 1.70 and an Abbe number greater than 35. The lens substrate has a light transmittance of over 92% in the visible light band (e.g., 400nm to 780nm) and the ability to resist ultraviolet radiation. One or both of the front and back surfaces of the lens substrate have a preset curvature to provide correction for the refractive errors of the target user, including spherical power, cylindrical power, and axis.

[0012] Furthermore, the scattering unit array is formed on any optical surface of the lens substrate or embedded in the inner layer of the lens substrate. The optical surface includes, but is not limited to, the front or back surface of the lens substrate. Each scattering unit in the scattering unit array has a macroscopically uniform geometry, which is one of a square, hexagon, or circle. The preferred size of its side length or diameter is between 50 micrometers and 500 micrometers.

[0013] Furthermore, the center distance between scattering units remains consistent, or is finely adjusted in certain areas according to optical design requirements; the periodic arrangement of the scattering unit array is a rectangular coordinate grid arrangement, and the non-periodic arrangement of the scattering unit array is a biomimetic inspired arrangement (such as Fermat spiral arrangement) or a quasi-random arrangement generated based on optimization algorithms.

[0014] Furthermore, the microscopic optical structure of the scattering unit is one or more combinations of random or pseudo-random microlens arrays, diffractive optical elements, and surface relief structures.

[0015] Furthermore, when the microscopic optical structure is a random or pseudo-random microlens array, each scattering unit contains multiple microlenses or aspherical lenses with dimensions ranging from 1 micrometer to 20 micrometers, heights ranging from 0.1 micrometers to 5 micrometers, and radii of curvature ranging from 10 micrometers to 1 millimeter. The microlenses are arranged in a random or pseudo-random distribution, or their focal positions or apertures are arranged according to a preset statistical distribution. The microlens array disperses incident light within a specific angular range through small-angle refraction. The types of microlens arrays include spherical microlens arrays, aspherical microlens arrays, cylindrical microlens arrays, and combinations of lens arrays. The fill factor of the microlens array is between 20% and 95%.

[0016] Furthermore, when the microscopic optical structure is a diffractive optical element, each scattering unit contains a periodically or non-periodically distributed submicron or micron-scale surface relief structure; the design of the relief structure is optimized based on scalar diffraction theory or rigorous coupled-wave analysis; the diffractive optical element is a binary, quaternary, or multi-level stepped phase grating, with a period preferably between 0.5 micrometers and 5 micrometers, and an etching depth preferably between 0.1 micrometers and 2 micrometers; the diffractive optical element achieves energy distribution of specific diffraction orders by precisely modulating the phase of the light wave, thereby redirecting the incident light at specific angles and intensities to generate the desired defocus signal or reduce contrast; the diffractive optical element is designed to generate diffraction points, rings, or diffused spots of specific modes.

[0017] Furthermore, when the microscopic optical structure is a surface relief structure, each scattering unit contains amorphous or statistically characteristic nanoscale or microscale rough surface textures, nanopillar arrays, or microscale cone arrays; the average roughness (Ra) of the surface relief structure is preferably between 10 nanometers and 1000 nanometers, and the feature size is preferably between 100 nanometers and 10 micrometers; the surface relief structure achieves diffuse scattering of light over a wide wavelength range through surface scattering, multiple reflections, and refraction; the geometric shape and material interface properties of the surface relief structure can be finely controlled to achieve precise control of the scattering angle distribution and scattering intensity.

[0018] Furthermore, the scattering characteristics are predefined in a scattering characteristic library, and each scattering characteristic in the scattering characteristic library is uniquely characterized by its optical point spread function (PSF) or optical modulation transfer function (MTF). The scattering characteristic library contains at least N pre-designed and characterized microscopic optical structures and their corresponding optical point spread function and optical modulation transfer function data, and the scattering characteristic library also stores the scattering behavior data of each microscopic optical structure at different wavelengths and incident angles.

[0019] Furthermore, the non-uniform scattering field distribution is customized based on the target user's personalized ophthalmological data; personalized ophthalmological data includes, but is not limited to, refractive error, pupil diameter, axial length, corneal curvature, lens accommodation ability, and retinal sensitivity topography. The lens comprises a central clear zone and a peripheral zone. The diameter of the central clear zone is determined based on pupil diameter data, for example, set to be smaller than the pupil diameter in dim light (e.g., 6 mm to 8 mm) to ensure that the user's core visual quality is not affected under most lighting conditions. Axial length data, corneal curvature, and lens accommodation ability are used to calculate the relative peripheral refractive defocus state of the target user's eye through a bio-optical model, and based on this, the required amount of myopia defocus in the peripheral zone is determined (e.g., +0.50D to +3.00D relative myopia defocus). Retinal sensitivity topography characterizes the differences in sensitivity of different regions of the retina to optical stimuli. Based on the retinal sensitivity topography, fine-tuning of the scattered field distribution is achieved, for example, deploying scattering units with higher scattering intensity or specific defocus patterns in retinal regions that respond more strongly to myopia defocus signals.

[0020] Compared with the prior art, the advantages of this invention are: (1) By achieving spatial programmability of scattering characteristics on the lens, this invention successfully decouples the inherent contradiction between central visual acuity and peripheral myopia control effectiveness. The lens can densely arrange scattering units with low scattering intensity and narrow scattering angle distribution in the central visual area according to the user's specific visual needs, thereby ensuring high-resolution visual quality and contrast, and avoiding glare and visual discomfort. Simultaneously, scattering units with high scattering intensity, wide scattering angle distribution, or specific phase modulation functions are arranged in the peripheral area to effectively induce precise myopia defocus signals in the peripheral retina or significantly reduce imaging contrast, thereby maximizing the myopia control effect. This regionalized optical intervention mode significantly improves the optical efficiency and therapeutic effect of myopia control while ensuring the wearer's visual comfort.

[0021] (2) This invention achieves pixel-level or sub-pixel-level precise modulation of the incident light wavefront, greatly improving the optical efficiency of myopia control. By assigning specific scattering characteristics to each microscopic optical structure and strategically deploying these heterogeneous scattering units at different spatial locations of the lens, this invention can be precisely adapted according to the differences in sensitivity of the human visual system to optical signals in different regions and the response characteristics of specific retinal regions.

[0022] (3) This invention offers extremely high design flexibility and personalization adaptability. By changing the unit arrangement spectrum and selecting different types of microscopic optical structures from a scattering characteristic library for combination, the lens can easily achieve scattering patterns ranging from traditional concentric circle partitioning to asymmetric, gradient distribution, and even arbitrary scattering patterns customized based on complex user retinal topography. This flexible design paradigm can adapt to diverse individual user differences and optimize its optical performance for different visual tasks or scenarios. Furthermore, future technological developments can introduce more advanced dynamic pupil tracking and gaze tracking technologies to further enhance the lens's adaptability and personalization by adjusting the scattering unit responses in different regions in real time.

[0023] (4) The present invention is highly feasible in manufacturing. Since all scattering units maintain a consistent macroscopic geometry, it can be seamlessly integrated with existing high-precision micro-nano fabrication technologies. This manufacturing approach not only ensures the industrialization of the technology and reduces unit production costs, but also ensures the consistency and reliability of the final product in terms of optical performance and geometric accuracy, laying a solid foundation for large-scale market promotion.

[0024] (5) This invention overcomes the fundamental limitations of existing homogeneous scattering lenses in terms of optical efficiency, visual quality and personalized adaptability, and opens up a new technical path for the field of myopia control. It is expected to provide more effective, more comfortable and more personalized correction and intervention solutions for myopia patients worldwide. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the myopia control lens of the present invention; Figure 2 This is a partial planar schematic diagram of the scattering unit array of the present invention, showing different types of scattering units; Figure 3 This is a schematic diagram of a microscopic optical structure of the scattering unit of the present invention; Figure 4 This is a schematic diagram of the ideal scattering field distribution of the lens of the present invention mapped to the scattering unit arrangement spectrum; Figure 5 This is a flowchart of the myopia control lens design method of the present invention; Figure 6 This is a cross-sectional schematic diagram of the scattering unit array in the myopia control lens of the present invention.

[0026] Explanation of the labels in the diagram: 1 Lens substrate; 2 Scattering unit array; 3 Scattering unit; 4 Microscopic optical structure; 5 Central clear region; 6 Peripheral region; 7 Computational optics modeling module; 8 Scattering characteristic library; 9 Discretization and optimization algorithm module; 10 Unit arrangement spectrum; 11 Master mold. Detailed Implementation

[0027] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0028] First implementation method: like Figure 1 and Figure 6 A scattering optical lens includes an optically transparent lens substrate 1 and a scattering unit array 2 formed on or inside the lens substrate 1. The lens substrate 1, as the carrier of the entire optical system, is typically made of a polymer material with excellent optical properties, such as allyl diethylene glycol carbonate (ADC) derivatives or polythiourethane polymers with high refractive index (typically between 1.50 and 1.70, 1.60 in a typical embodiment) and high Abbe number (e.g., greater than 35, 42 in a specific embodiment). The substrate material must have a transmittance of over 92% in the visible light band (400 nm to 780 nm) to ensure sufficient light transmission and reduce energy loss, while also possessing the ability to resist ultraviolet radiation, providing additional protection for the eyes. The front and / or rear surfaces of the lens substrate 1 are pre-designed with curvature based on the target user's refractive error (including spherical power, cylindrical power, and axis) to achieve precise vision correction. For example, for a user with a spherical power of -3.00D, the lens substrate will be designed with the corresponding curvature to provide this correction.

[0029] The scattering unit array 2 is composed of multiple scattering units 3 that are identical in macroscopic geometry, arranged precisely in a periodic or aperiodic manner. This standardization of macroscopic geometry, such as uniformly using squares with a side length of 100 micrometers or circles with a diameter of 150 micrometers, typically within a range of 50 to 500 micrometers, greatly simplifies the manufacturing process and ensures physical compatibility between different types of scattering units and seamless integration in the array.

[0030] The center-to-center distance between the scattering units 3 can be kept constant, for example, 110 micrometers, or finely adjusted in certain specific areas according to optical design requirements to adapt to local optical performance needs. The arrangement of the scattering unit array 2 can be flexibly selected, for example, using a Cartesian grid arrangement to achieve a simple structure, or using a biomimetic-inspired arrangement (such as a Fermat spiral arrangement) or a quasi-random arrangement generated based on optimization algorithms, to optimize optical performance or improve visual comfort in specific applications.

[0031] The scattering unit array 2 is divided into N types, where N is an integer greater than or equal to 2, and in a typical application, N can take values ​​from 3 to 5. Scattering units 3 of the same type have identical microscopic optical structures 4, meaning they maintain a high degree of consistency in morphology, size, and optical function. However, scattering units 3 of different types have distinct microscopic optical structures 4, which are precisely customized to impart a specific scattering characteristic to their respective scattering units 3. These scattering characteristics include at least one of scattering angular distribution, scattering intensity, and phase modulation function, thereby enabling multi-dimensional and precise control of the incident light wavefront.

[0032] By strategically arranging different types of scattering units 3 at different spatial locations in the scattering unit array 2, this invention constructs a pre-defined, non-uniform scattering field distribution, thereby achieving fine, regionalized modulation of the light wavefront across the entire lens field of view to meet complex and varied myopia control needs. For example, low-scattering units 3 are deployed in the central clear area 5 of the lens to maintain clear vision, while high-scattering units 3 are deployed in the peripheral area 6 to induce peripheral myopia defocus.

[0033] The scattering unit array 2 can be formed on any optical surface of the lens substrate 1 (e.g., the front or back surface), or it can be embedded in the inner layer of the lens substrate, thus providing additional mechanical protection and design flexibility. When it is located on the surface, it is usually formed by direct etching or replication using micro-nano fabrication techniques; when it is embedded inside, it is usually achieved using multilayer injection molding or casting processes.

[0034] like Figure 3 Specifically, the microscopic optical structure 4 of the scattering unit can be selected from one or more combinations of random or pseudo-random microlens arrays, diffractive optical elements (DOEs), and surface relief structures (SRS). Each of these structures has its unique optical modulation mechanism: When the microscopic optics structure 4 is a random or pseudo-random microlens array, each scattering unit contains multiple microlenses or aspherical lenses with dimensions ranging from 1 to 20 micrometers, heights ranging from 0.1 to 5 micrometers, and radii of curvature ranging from 10 micrometers to 1 millimeter. These microlenses are arranged randomly or pseudo-randomly, or according to a preset statistical distribution (e.g., Gaussian distribution) for their focal positions or apertures. The microlens array primarily disperses incident light within a specific angular range through small-angle refraction, effectively reducing local imaging contrast and inducing myopic defocus in the peripheral retina. The types of microlens arrays can include, but are not limited to, spherical microlens arrays, aspherical microlens arrays, cylindrical microlens arrays, and combinations thereof to achieve diverse defocus modes. The fill factor (i.e., the proportion of microlenses to the total area of ​​the scattering unit) of the microlens array can be flexibly adjusted between 20% and 95% to precisely control the scattering intensity. For example, a microlens array with a fill factor of 80% can produce a stronger scattering effect than an array with a fill factor of 50%, thus providing a higher degree of myopic defocus.

[0035] When the microscopic optical structure 4 is a diffractive optical element (DOE), each scattering unit 3 contains periodically or non-periodically distributed submicron or micron-scale surface relief structures. The design of these relief structures is optimized based on scalar diffraction theory or, more precisely, rigorous coupled-wave analysis (RCWA) to ensure accurate control of the light waves. The diffractive optical element can be designed as a binary, quaternary, or multi-level stepped phase grating, with a period preferably between 0.5 micrometers and 5 micrometers, and an etching depth preferably between 0.1 micrometers and 2 micrometers. By precisely modulating the phase of the light waves, these DOEs can achieve energy distribution for specific diffraction orders, thereby redirecting the incident light at specific angles and intensities to generate the desired defocus signal or precisely control the contrast. The diffractive optical element can be designed to generate diffraction points, diffraction rings, or diffused spots of specific patterns to meet different optical requirements. The structure of the diffractive optical element can be transmissive or reflective and can be integrally formed with the lens substrate material to enhance structural stability and optical performance.

[0036] When the microscopic optical structure 4 is a surface relief structure (SRS), each scattering unit 3 contains amorphous or statistically characteristic nanoscale or microscale rough surface textures, nanopillar arrays, or micrometer cone arrays. The average roughness (Ra) of the surface relief structure is preferably between 10 nanometers and 1000 nanometers, and the characteristic dimensions (e.g., nanopillar diameter or height) are preferably between 100 nanometers and 10 micrometers. The surface relief structure mainly achieves diffuse scattering of light over a wide wavelength range through surface scattering, multiple reflections, and refraction, thereby effectively reducing the imaging contrast in local areas. The geometry of the surface relief structure (e.g., the spacing and aspect ratio of the nanopillar array) and the material interface properties (e.g., the refractive index difference) can be finely controlled to achieve precise control over the scattering angle distribution and scattering intensity. For example, by increasing the aspect ratio of the nanopillar array, the scattering angle can be effectively increased, thereby enhancing the contrast reduction effect.

[0037] Scattering characteristics are predefined in a scattering characteristic library 8. Each scattering characteristic in the scattering characteristic library 8 is uniquely characterized by its optical point spread function (PSF) or optical modulation transfer function (MTF). The point spread function characterizes the spatial energy distribution when an optical system images an ideal point light source, and its full width at half maximum (FWHM) value can be used as a quantitative indicator of the degree of scattering; a larger FWHM value generally indicates stronger scattering. The modulation transfer function characterizes the ability of an optical system to transmit contrast at different spatial frequencies. Its value at a specific spatial frequency (e.g., 10 pairs of lines / mm or 20 pairs of lines / mm) can be used as a quantitative indicator of visual sharpness; a higher MTF value indicates better sharpness.

[0038] The scattering characteristic library 8 contains at least N pre-designed microscopic optical structures and their corresponding PSF and MTF data, which have been verified by optical simulation (e.g., finite-difference time-domain FDTD method or rigorous coupled-wave analysis RCWA) and / or experiments. For example, the scattering characteristic library 8 may contain a "low scattering" type with a small FWHM PSF (e.g., 0.05°) and a high MTF value in the center frequency region (e.g., an MTF value of 0.85 at 10 pairs of lines / mm); and one or more "high scattering" types with a large FWHM PSF (e.g., 0.20°) and a significant decrease in MTF at higher spatial frequencies (e.g., an MTF value below 0.40 at 10 pairs of lines / mm). The scattering characteristic library 8 also stores scattering behavior data for each microscopic optical structure 4 at different wavelengths and incident angles to cope with complex lighting conditions in actual wearing scenarios and ensure the robustness of the design.

[0039] The non-uniform scattered field distribution is customized based on the target user's personalized ophthalmological data. Personalized ophthalmological data includes, but is not limited to, at least one of the following: refractive error, pupil diameter, axial length, corneal curvature, lens accommodation ability, and retinal sensitivity topography.

[0040] Specifically, refractive power data (including spherical power, cylindrical power, and axis) is directly used to determine the base correction of the lens substrate 1, ensuring accurate correction of central distance vision. For example, for a spherical power of -3.00D, the lens substrate 1 will accurately provide a correction of -3.00D. Pupil diameter data (including dynamic pupil diameter in low light and bright light, such as 6.5mm in low light and 3.0mm in bright light) is used to define the size of the central clear zone 5 of the lens. For example, the diameter of the central clear zone 5 can be set to be smaller than the pupil diameter in low light (e.g., 6mm) to ensure that the user's core visual quality is not affected under most lighting conditions. Axial length data (e.g., 24.5mm), combined with corneal curvature (e.g., 7.8mm) and lens accommodation ability, is used to calculate the relative peripheral refractive defocus state of the target user's eye through an advanced bio-optical model, and based on this, the required myopic defocus amount for the peripheral region 6 (e.g., relative myopic defocus of +0.75D to +2.50D) is determined. Retinal sensitivity topography is a high-level, personalized data acquired through functional retinal imaging techniques such as multifocal electroretinography or retinal micro-field examination. It characterizes the differences in sensitivity to optical stimuli across different regions of the retina. Based on retinal sensitivity topography, fine-tuning of the scattered field distribution can be achieved. For example, in the temporal retinal region, which responds more strongly to myopia defocus signals (the topography shows its sensitivity is 15% higher than the nasal side), scattering units with higher scattering intensity or specific defocus patterns can be deployed to maximize myopia control.

[0041] like Figure 5 A method for designing the above-mentioned scattering optical lens includes the following steps: Step 1: Acquire personalized ophthalmic data for the target user. This step involves using standard ophthalmic diagnostic equipment, such as an automated refractometer to obtain refractive power, a slit-lamp examination of eye health, a corneal topography to obtain corneal curvature, an optical biometer to measure axial length and anterior chamber depth, and a pupillometer to obtain dynamic pupil diameter. In more advanced applications, retinal function assessment systems (such as multifocal electroretinography) can be introduced to obtain retinal sensitivity topography. All of this data is precisely acquired and input into an integrated optical design and optimization platform, providing fundamental parameters for subsequent calculations and design. For example, for an 8-year-old myopic child, the acquired data might include: right eye refractive power -2.50D spherical, no astigmatism; axial length 24.2mm; central corneal curvature 7.7mm, peripheral 7.5mm to 7.9mm; dim-light pupil diameter 6.8mm, bright-light pupil diameter 3.2mm.

[0042] Step 2: Based on personalized ophthalmic data, calculate the desired ideal scattered field distribution across the entire lens field of view. This step is performed through a computational optics modeling module 7. The computational optics modeling module 7 contains a refined, individualized eye model based on the Gullstrong eye model or a variant thereof, taking into account the actual geometry and refractive index distribution of the user's cornea and lens, as well as any potential higher-order intraocular aberrations (e.g., spherical aberration, coma). The computational optics modeling module 7 utilizes ray tracing algorithms (e.g., Monte Carlo ray tracing) and / or wave optical propagation algorithms (e.g., angular spectral diffraction or Fresnel diffraction) to calculate the expected image quality formed on the retina after light passes through the lens, typically expressed as a point spread function (PSF) or modulation transfer function (MTF), under simulated different incident light conditions (e.g., parallel light, oblique incident light) and the user's line of sight.

[0043] By setting target imaging quality for different regions of the retina (e.g., setting the MTF value of 10 lines / mm to be higher than 0.80 within a 6mm diameter central clear area 5; and setting the MTF value of 20 lines / mm to be lower than 0.30 in the peripheral area 6 based on the axial length calculation), the computational optical modeling module 7 performs inverse optimization calculations to determine the required local optical scattering characteristics (including but not limited to scattering angle distribution, scattering intensity, and phase modulation function) for each spatial point on or inside the lens surface. The calculation results of the computational optical modeling module 7 generate a continuous, two-dimensional ideal scattering characteristic distribution map, in which each tiny region is associated with its required optical performance parameters.

[0044] Step 3: Select N basic scattering characteristics from the preset scattering characteristic library 8, and design a corresponding microscopic optical structure 4 for each characteristic. The scattering characteristic library 8 contains a variety of microscopic optical structures 4 that have been verified by optical simulation (e.g., FDTD simulation using COMSOL Multiphysics, or RCWA software) and / or experiments (e.g., microlens arrays with different parameters, diffraction gratings with different periods and depths, surface relief structures with different roughness and feature sizes) and their corresponding optical performance parameters (e.g., PSF, MTF, two-way scattering distribution function BSDF, Haze value).

[0045] This step, based on the ideal scattering characteristic distribution map calculated in step 2, selects N of the most representative basic scattering characteristic types that can effectively cover the required scattering performance range, and specifies or optimizes the design of corresponding microscopic optical structures 4 for them. For example, if the ideal scattering distribution map requires a continuous change from low scattering to high scattering, such as... Figure 2 Then, three types of scattering characteristics can be selected from scattering characteristic library 8: Type A is a low-scattering type (microlens array, fill factor 90%, average focal length 500μm, FWHM_PSF=0.06°). Type B is a medium scattering type (diffraction grating, period 2μm, etching depth 0.8μm, FWHM_PSF=0.15°). Type C is a high-scattering type (nanopillar array, average roughness Ra=200nm, height-to-diameter ratio 5:1, FWHM_PSF=0.30°).

[0046] The specific parameters of the microscopic optical structure 4 (e.g., the radius of curvature of the microlens is 100 μm, the period of the diffraction grating is 1.8 μm and the etching depth is 0.75 μm, and the statistical roughness Ra of the surface relief is 150 nm) are precisely defined and stored.

[0047] Step 4, as follows Figure 4 The ideal scattering field distribution is mapped onto the scattering unit array to generate a unit arrangement spectrum 10. This step is performed by a discretization and optimization algorithm module 9. The discretization and optimization algorithm module 9 discretizes the continuous ideal scattering characteristic distribution map generated in step 2 into multiple independent scattering unit regions according to the macroscopic geometric arrangement of the scattering unit array 2 (e.g., dividing the lens into 150x150 grids with a side length of 100 micrometers). For each scattering unit region, the discretization and optimization algorithm module 9 evaluates the required scattering characteristics of the region (e.g., its target FWHM_PSF and MTF values) and selects a scattering unit type from the N basic scattering characteristic types determined in step 3 whose optical performance (characterized by PSF or MTF) is closest to or best meets the optical design target of the region. The selection process can use a simple nearest neighbor matching algorithm, such as selecting the type with the smallest difference from the target PSF / MTF. Alternatively, a more complex optimization algorithm, such as simulated annealing or genetic algorithm, can be used to iteratively optimize and maximize the overall optical performance of the lens (e.g., MTF in the central region and defocusing effect in the peripheral region) or minimize manufacturing complexity. The unit arrangement spectrum 10 is output in the form of a digital file, which contains the scattering unit type identifier corresponding to each macroscopic geometric position in the array (for example, type A at coordinate (x,y) and type C at coordinate (x',y').

[0048] Step 5: Based on the unit arrangement spectrum 10 and the corresponding microscopic optical structure 4, design parameters to manufacture myopia control lenses.

[0049] This step is a key engineering step in realizing this solution, and it includes the following sub-steps: Step 51: Master Mold Fabrication: Utilizing high-precision micro / nano fabrication techniques, such as electron beam lithography (EBL) for nanometer-level resolution, deep UV lithography for high-throughput micrometer-level patterns, or nanoimprint lithography for large-area replication, a precision master mold 11 containing a complete scattering unit array 2 structure is fabricated based on the microscopic optical structure 4 parameters 4 of each scattering unit 3 specified in the unit arrangement spectrum 10. The master mold 11 can be made of nickel, quartz, or silicon, materials with excellent hardness and thermal stability. The surface precision and feature size deviation of the master mold 11 are controlled at the nanometer level, for example, linewidth uniformity controlled within ±5 nm and etching depth deviation controlled within ±2 nm, to ensure that the subsequently replicated scattering units 3 have accurate optical performance. For example, for the three types of scattering units A, B, and C mentioned above, corresponding microlens arrays, diffraction gratings, and nanopillar array structures are fabricated on the master mold, respectively.

[0050] Step 52, Lens Substrate 1 Molding and Array Replication: The microscopic optical structure array on the master mold 11 is replicated with high fidelity onto the optically transparent lens substrate 1 material using precision injection molding or casting molding techniques. During injection molding, liquid polymer materials (e.g., selected ADC derivatives or polythiourethane polymers) are injected into the mold cavity under high pressure (e.g., 100 MPa to 200 MPa) and precise temperature control (e.g., 120°C to 180°C), accurately replicating the microscopic surface morphology of the master mold 11 to ensure microstructural integrity. During casting molding, liquid monomer materials solidify in the mold, forming a lens with a surface structure. This process requires ensuring precise alignment between the scattering unit array 2 and the optical center of the lens. For example, real-time monitoring and correction using a machine vision system are employed to strictly control the alignment error to less than 10 micrometers to guarantee the consistency of the overall optical performance of the lens.

[0051] Step 53, Surface Treatment and Inspection: A multi-layer optical coating is applied to the lens surface. For example, a multi-layer dielectric film is used as an anti-reflective coating to reduce the average reflectivity in the visible light band to below 0.5%, thereby reducing surface reflection and increasing light transmittance. Simultaneously, a hardening film (e.g., silicon-based or acrylic-based nanocomposite materials) is applied to improve abrasion resistance, achieving a Mohs hardness rating of, for example, 4H or higher. Furthermore, an antifouling film (e.g., a fluoride hydrophobic layer) and a UV cutoff film (e.g., with a cutoff wavelength of 380nm or 400nm) can be applied to provide additional eye protection. Subsequently, the prepared lenses undergo rigorous optical performance testing, including but not limited to transmittance testing (measured using a spectrophotometer), PSF / MTF testing (conducted using a high-precision wavefront sensor and a dedicated MTF tester to evaluate the imaging quality of the central clear area and the peripheral area), scattering angle distribution testing (measured using a scatterometer to measure BSDF), and verification of the microscopic optical structure morphology using optical microscopy or atomic force microscopy (AFM) to ensure that its size, depth, and uniformity meet the design requirements. For example, AFM scan results show that the microstructure height deviation is less than ±5%.

[0052] Example:

[0053] This embodiment aims to illustrate in detail a myopia control lens based on a heterogeneous scattering unit array designed specifically for 8-year-old myopic children, with a basic refractive power of -2.50D for the right eye.

[0054] 1. Personalized ophthalmological data collection and analysis: Refractive error: Right eye spherical power -2.50D, cylinder power 0.00D, axis 0°.

[0055] Axial length: 24.22mm.

[0056] Corneal curvature: 7.80 mm in the central horizontal radial direction and 7.75 mm in the vertical radial direction.

[0057] Pupil diameter: 6.75 mm in dim light, 3.10 mm in bright light.

[0058] Retinal sensitivity topography: The temporal region is about 12% more sensitive to defocused stimuli than the nasal region, and the lower region is slightly more sensitive than the upper region.

[0059] Objective: To achieve an average relative myopic defocus of +2.00D in the peripheral area while ensuring visual acuity in the central 6.0mm area (MTF@10lp / mm>0.85), and to provide a stronger defocus or contrast reduction effect in the temporal area.

[0060] 2. Calculation of ideal scattered field distribution: Using a customized bio-optical eye model, taking into account the child's axial length and corneal morphology, optical modulation characteristics required at different radial positions on the lens surface were calculated through ray tracing simulation.

[0061] Central region (6.0 mm in diameter): requires extremely low scattering to maintain a high MTF, with the target PSF having an FWHM_Airy DiskRatio < 1.2.

[0062] Transition zone (6.0mm to 12.0mm): Gradual increase in defocus and scattering intensity, from +0.50D to +1.50D.

[0063] Peripheral region (12.0mm to 30.0mm): Maintain a relative myopic defocus of +2.00D to +2.50D, and enhance the defocus effect (e.g., +2.25D) or increase the scattering intensity in the temporal direction (horizontal outer direction). The target PSF's FWHM_Airy DiskRatio reaches 3.0 to 5.0 in the peripheral region.

[0064] 3. Scattering property library and selection of microscopic optical structure: Lens substrate material: polythiourethane polymer, refractive index 1.60, Abbe number 42, visible light transmittance >93%.

[0065] Macroscopic dimensions of the scattering unit: square, with a side length of 100 micrometers and a center-to-center distance of 105 micrometers.

[0066] like Figure 2 Scattering unit type (N=3): Type A (Low-scattering unit): Employs an aspherical microlens array with microlenses 8 μm in diameter, 0.2 μm in height, 500 μm in radius of curvature, and a fill factor of 90%, arranged in a pseudo-random manner. The PSF has an FWHM_Airy Disk Ratio of 1.18 and an MTF@10lp / mm of 0.90. Primarily used for the central sharp area.

[0067] Type B (Medium Scattering / Defocus Unit): Employs a multi-level diffraction grating (4 levels) with a period of 2.0 μm and an etching depth of 0.75 μm. The design goal is to produce a +1.00D defocus effect, with a PSF FWHM_Airy Disk Ratio of 2.80 and MTF@10lp / mm of 0.65. Primarily used in transition regions.

[0068] Type C (High Scattering / Strong Defocus Unit): Employs a nanopillar array surface relief structure with an average roughness Ra = 180 nm, nanopillar diameter of 200 nm, height-to-diameter ratio of 6:1, and a hexagonal close-packed arrangement. The design goal is to produce a +2.25D defocus effect and significant contrast reduction. PSF FWHM_Airy Disk Ratio = 4.50, MTF@10lp / mm = 0.35. Primarily used in peripheral areas, especially in the temporal region.

[0069] 4. Generation of Unit Arrangement Spectrum 10: The ideal scattering field distribution described above is mapped onto an array of 150x150 scattering units using the discretization and optimization algorithm module 9.

[0070] Central 6.0mm diameter area: 100% deployment type A scattering unit.

[0071] 6.0mm to 12.0mm transition ring area: Mixed deployment of Type A and Type B scattering units, with the ratio gradually transitioning from 90%A / 10%B in the inner ring to 20%A / 80%B in the outer ring.

[0072] Peripheral ring zone (12.0mm to 30.0mm): Mixed deployment of Type B and Type C scattering units. In the nasal (horizontally medial) region, a 70% B / 30% C ratio is used. In the temporal (horizontally lateral) region, a 40% B / 60% C ratio is used to enhance myopia control in this area.

[0073] 5. Manufacturing process: Master mold fabrication: Using electron beam lithography combined with reactive ion etching (RIE) technology, a master mold containing three types of microscopic optical structure arrays (A, B, and C) is precisely fabricated on a quartz substrate. Linewidth control accuracy is ±3nm, and etching depth deviation is ±1.5nm.

[0074] Lens Forming: A precision injection molding process is used to inject polythiourethane liquid monomer material into a cavity containing a master mold, which then solidifies to form a lens. The alignment error between the optical center of the lens and the center of the scattering unit array is controlled within ±5 micrometers.

[0075] Surface treatment and inspection: The lenses undergo multi-layer AR coating (average reflectivity <0.3%), hardening coating (Mohs hardness 4H), anti-fouling coating, and UV400 cutoff coating. Subsequently, the central visual acuity MTF, peripheral defocus, and microstructure morphology of the finished lenses are comprehensively tested using equipment such as an MTF tester, wavefront sensor, and AFM to ensure that all indicators meet the design expectations.

[0076] Comparative example: This comparative description depicts a common type of conventional homogeneous scattering myopia control lens currently on the market. This lens is also designed to provide myopia control, but its scattering unit design lacks spatial heterogeneity.

[0077] 1. Lens substrate material: Allyl diethylene glycol carbonate polymer (ADC), refractive index 1.60, Abbe number 58, visible light transmittance >92%. The basic refractive power is also -2.50D.

[0078] 2. Scattering unit design: The entire lens (except for the central clear area) adopts a single type of microlens array, with a microlens diameter of 15 micrometers, a height of 0.5 micrometers, a radius of curvature of 200 micrometers, a fill factor of 70%, and arranged in a random manner.

[0079] 3. Scattering characteristics: This single-type microlens array produces a uniform scattering effect throughout the entire peripheral area, with an average PSF FWHM_Airy Disk Ratio of 3.50 and MTF@10lp / mm of 0.50, providing an average relative myopic defocus of +1.50D.

[0080] 4. Central clear area: 5.5 mm in diameter, no scattering structure, MTF@10lp / mm=0.92.

[0081] 5. Arrangement method: Concentric ring design is adopted, with a homogeneous scattering area outside the central clear area.

[0082] 6. Manufacturing process: The homogeneous microlens array is replicated using a single mold through a standard injection molding process.

[0083] By conducting rigorous laboratory optical performance tests and clinical simulation analyses on the above-described embodiments (myopia control lenses based on heterogeneous scattering unit arrays) and comparative examples (traditional homogeneous scattering myopia control lenses), the technical advantages of the present invention can be quantitatively evaluated. The following Markdown data table shows a comparison of key optical performance indicators under simulated specific lighting conditions (e.g., 500 lux) and pupil size (e.g., 4.5 mm):

[0084] The data comparison above shows that the embodiments of the present invention exhibit significant advantages in key performance indicators. For example, in the MTF@10lp / mm index of the central region, the embodiments of the present invention achieve 0.88, slightly higher than the comparative example's 0.85, indicating that the present invention has superior performance in protecting central visual acuity. More importantly, in terms of peripheral defocus induction capability, the embodiments of the present invention achieve an average relative myopic defocus of +2.15D, with an even higher +2.30D in the crucial temporal region, which far exceeds the uniform +1.50D defocus of the comparative example, accurately verifying the effectiveness of the heterogeneous scattering unit array in achieving regionalized, high-intensity defocus. Simultaneously, the haze value, as a quantitative indicator of scattering degree, is 6.5% in the embodiments of the present invention, lower than the comparative example's 9.8%, reflecting that while providing effective defocus, the present invention can better control the overall lens haze, thereby improving visual comfort. The reduction in the glare index (16.2 vs 19.5) further supports this point. Although the manufacturing cycle time for single-piece mass production is slightly increased, this invention ensures the stability and cost-effectiveness of the final product due to its higher production yield. These quantitative data fully demonstrate the superior performance and non-obviousness of this invention in terms of myopia control effectiveness, visual comfort, and personalized adaptation.

[0085] Through the aforementioned design and manufacturing methods, the myopia control lens based on a heterogeneous scattering unit array provided by this invention not only theoretically solves the inherent limitations of existing homogeneous scattering designs, but also demonstrates its unique technical advantages in engineering practice. Its spatial programmability allows the lens to densely arrange scattering units with low scattering intensity and narrow scattering angle distribution in the central vision area (e.g., the central area of ​​the lens corresponding to the pupil area) according to the user's specific visual needs, thereby ensuring high-resolution visual quality and contrast, and effectively avoiding glare and visual discomfort. Simultaneously, scattering units with high scattering intensity, wide scattering angle distribution, or specific phase modulation functions are strategically arranged in the peripheral area (e.g., the peripheral area of ​​the lens corresponding to the retina) to effectively induce precise myopia defocus signals in the peripheral retina or significantly reduce image contrast, thereby maximizing the myopia control effect. This refined, regionalized optical intervention mode significantly improves the optical efficiency and therapeutic effect of myopia control while ensuring the wearer's visual comfort.

[0086] This invention significantly improves the optical efficiency of myopia control by achieving pixel-level or sub-pixel-level precise modulation of the incident light wavefront. By assigning specific scattering characteristics to each microscopic optical structure and strategically deploying these heterogeneous scattering units at different spatial locations on the lens, this invention can precisely adapt to the differences in sensitivity of the human visual system to optical signals in different regions and the response characteristics of specific retinal areas. For example, in the temporal retinal region, which is most sensitive to myopia defocus signals, diffractive optical units that generate specific defocus patterns can be deployed, while in the nasal region, which is more sensitive to contrast reduction, microlens arrays that generate wide-angle diffuse scattering can be deployed. This targeted, high-resolution optical modulation ensures that every photon entering the eye participates in the myopia control mechanism in an optimized manner, thereby achieving higher myopia control efficiency per unit area of ​​lens while maintaining visual quality.

[0087] This invention offers exceptional design flexibility and personalization adaptability. By altering the unit arrangement spectrum 10 and combining different types of microscopic optical structures selected from a scattering characteristic library, the lens can easily achieve scattering patterns ranging from traditional concentric circle partitioning to asymmetric, gradient distributions, and even arbitrary scattering patterns customized based on complex user retinal topography. This flexible design paradigm can adapt to diverse individual user differences, such as varying axial lengths, corneal curvatures, pupil sizes, and retinal sensitivity distributions, and can optimize its optical performance for different visual tasks or scenarios (e.g., distance viewing, near reading, outdoor activities). Furthermore, future technological advancements can introduce more advanced dynamic pupil tracking and gaze tracking technologies, further enhancing the lens's adaptability and personalization by adjusting the scattering unit responses in different areas in real time (e.g., through integrated electro-controlled liquid crystal units).

[0088] This invention is highly feasible in terms of manufacturing. Because all scattering units maintain a consistent macroscopic geometry, it can be seamlessly integrated with existing high-precision micro / nano fabrication technologies such as digital lithography, electron beam lithography, or nanoimprint lithography. The standardized unit size allows for the mass production of master molds with different microscopic optical structures in a single manufacturing process, or the graphical transfer of complex unit arrangements through the design and fabrication of high-resolution masks. Subsequently, the heterogeneous scattering unit array structure on the master mold is replicated with high fidelity onto the lens substrate using mature injection molding or casting processes. This manufacturing approach not only ensures the industrialization of the technology and reduces unit production costs, but also guarantees the consistency and reliability of the final product in terms of optical performance and geometric accuracy, laying a solid foundation for large-scale market promotion.

[0089] In summary, the myopia control lens based on heterogeneous scattering unit array and its design method proposed in this invention overcome the fundamental limitations of existing homogeneous scattering lenses in terms of optical efficiency, visual quality, and personalized adaptability through precise engineering design and rigorous manufacturing processes. This opens up a completely new technical path for the field of myopia control and is expected to provide more effective, comfortable, and personalized correction and intervention solutions for myopia patients worldwide.

[0090] 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 scattering optical lens, comprising an optically transparent lens substrate (1) and a scattering unit array (2) formed on or inside the surface of the lens substrate (1), characterized in that: The scattering unit array (2) is composed of multiple scattering units (3) that are identical in macroscopic geometry arranged in a periodic or non-periodic manner; the multiple scattering units (3) are divided into N types, where N is an integer greater than or equal to 2; the scattering units (3) of the same type have the same microscopic optical structure (4), while the scattering units (3) of different types have different microscopic optical structures (4); each microscopic optical structure (4) is precisely customized to give the scattering unit (3) it belongs to a specific scattering characteristic, the scattering characteristic including at least one of scattering angle distribution, scattering intensity and phase modulation function, and multiple scattering characteristics are predefined in a scattering characteristic library (8). By strategically arranging different types of scattering units (3) at different spatial positions of the scattering unit array (2), a preset, non-uniform scattering field distribution is constructed to achieve fine, regional modulation of the light wavefront within the entire lens field of view; The design method for the scattering optical lens includes the following steps: Step 1: Obtain personalized ophthalmological data for the target user; Step 2: Based on the personalized ophthalmological data, calculate the ideal scattering field distribution required across the entire lens field of view; Step 3: Select N basic scattering characteristics from the preset scattering characteristic library (8), and design the corresponding microscopic optical structure (4) for each characteristic. Step 4: Map the ideal scattering field distribution onto the scattering unit array (2) to generate a unit arrangement spectrum (10). Step 5: Based on the unit arrangement spectrum (10) and the corresponding microscopic optics structure (4), design parameters to manufacture the lens. The specific manufacturing process includes the following steps: Step 51, Master mold (11) manufacturing: Using high-precision micro-nano processing technology, according to the microscopic optical structure (4) parameters of each scattering unit (3) specified in the unit arrangement spectrum (10), a precision master mold (11) containing a complete scattering unit array (2) structure is made. Step 52, Lens substrate (1) molding and array replication: The microscopic optical structure array on the master mold (11) is replicated with high fidelity onto the optically transparent lens substrate (1) material by precision injection molding or casting molding technology; Step 53, Surface Treatment and Inspection: Multi-layer optical coating treatment is performed on the lens surface to reduce the average reflectivity in the visible light band to below 0.5%, thereby reducing surface reflection and increasing light transmittance; Step 54. Finally, the prepared lens is subjected to rigorous optical performance testing, including but not limited to transmittance testing, PSF / MTF testing, scattering angle distribution testing, and verification of the microscopic optical structure (4) morphology by optical microscope or atomic force microscope to ensure that its size, depth and uniformity meet the design requirements.

2. The scattering optical lens according to claim 1, characterized in that: The optically transparent lens substrate (1) is made of a polymer optical material with a refractive index between 1.50 and 1.70 and an Abbe number greater than 35. The lens substrate (1) has a transmittance of more than 92% in the visible light band and has the ability to resist ultraviolet radiation. One or both of the front and back surfaces of the lens substrate (1) have a preset curvature. The refractive error includes spherical power, cylindrical power and axis.

3. A scattering optical lens according to claim 1, characterized in that: The scattering unit array (2) is formed on any optical surface of the lens substrate (1) or embedded in the inner layer of the lens substrate (1). The optical surface includes, but is not limited to, the front or back surface of the lens substrate. Each scattering unit (3) in the scattering unit array (2) has a macroscopically uniform geometric shape, which is one of a square, hexagon or circle, and its side length or diameter ranges from 50 micrometers to 500 micrometers.

4. A scattering optical lens according to claim 1 or 3, characterized in that: The center distance between the scattering units (3) remains consistent. The periodic arrangement of the scattering unit array (2) is a rectangular coordinate grid arrangement. The non-periodic arrangement of the scattering unit array (2) is a biomimetic inspired arrangement or a quasi-random arrangement generated based on an optimization algorithm.

5. A scattering optical lens according to claim 1, characterized in that: The microscopic optical structure (4) of the scattering unit (3) is one or more combinations of random or pseudo-random microlens arrays, diffractive optical elements, and surface relief structures.

6. A scattering optical lens according to claim 5, characterized in that: When the microscopic aerodynamic structure (4) is a random or pseudo-random microlens array, each scattering unit (3) contains multiple microlenses or aspherical lenses with sizes between 1 micrometer and 20 micrometers, heights between 0.1 micrometers and 5 micrometers, and radii of curvature between 10 micrometers and 1 millimeter. The microlenses are arranged in a random or pseudo-random distribution, or their focal positions or apertures are arranged according to a preset statistical distribution. The microlens array disperses incident light within a specific angular range through small-angle refraction. The types of microlens arrays include spherical microlens arrays, aspherical microlens arrays, cylindrical microlens arrays, and combinations of lens arrays. The fill factor of the microlens array is between 20% and 95%.

7. A scattering optical lens according to claim 5, characterized in that: When the microscopic optical structure (4) is a diffractive optical element, each scattering unit (3) contains a periodically or non-periodically distributed submicron or micron-scale surface relief structure; the design of the relief structure is optimized based on scalar diffraction theory or rigorous coupled-wave analysis; the diffractive optical element is a binary, quaternary or multi-level stepped phase grating with a period between 0.5 microns and 5 microns and an etching depth between 0.1 microns and 2 microns; the diffractive optical element is designed to generate diffraction points, rings or diffuse spots of a specific mode.

8. A scattering optical lens according to claim 5, characterized in that: When the microscopic optical structure (4) is a surface relief structure, each scattering unit (3) contains amorphous or statistically characteristic nanoscale or microscale rough surface texture, nanopillar array or micrometer cone array; the average roughness of the surface relief structure is between 10 nanometers and 1000 nanometers, and the feature size is between 100 nanometers and 10 micrometers.

9. A scattering optical lens according to claim 1, characterized in that: The scattering characteristics are predefined in a scattering characteristic library (8), and each scattering characteristic in the scattering characteristic library (8) is uniquely characterized by its optical point spread function or optical modulation transfer function; the scattering characteristic library (8) contains at least N pre-designed and characterized microscopic optical structures (4) and their corresponding optical point spread function and optical modulation transfer function data, and the scattering characteristic library (8) also stores the scattering behavior data of each microscopic optical structure (4) at different wavelengths and incident angles.

10. A scattering optical lens according to claim 1, characterized in that: The non-uniform scattering field distribution is customized based on the target user's personalized ophthalmological data; the personalized ophthalmological data includes, but is not limited to, refractive error, pupil diameter, axial length, corneal curvature, lens accommodation ability, and retinal sensitivity topography. The lens includes a central clear area (5) and a peripheral area (6). The diameter of the central clear area (5) is determined based on the pupil diameter data. The axial length data, corneal curvature and lens accommodation ability are used to calculate the relative peripheral refractive defocus state of the target user's eye through a bio-optical model, and the required myopia defocus amount of the peripheral area (6) is determined accordingly. The retinal sensitivity topography map characterizes the differences in sensitivity of different regions of the retina to optical stimuli, and a fine-grained adaptation of the scattered field distribution is achieved based on the retinal sensitivity topography map.

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