Anti-myopia fogging spectacle lens based on laser micro-array and preparation method thereof

Abstract

This application provides a near-vision control fogging optical lens based on a laser micro-dot array and its preparation method. Applied to the field of optical lens technology, it reduces the contrast of incident light to a specific threshold through a dense laser micro-dot array across its entire surface, reducing excessive stimulation of retinal photoreceptor cells to high-contrast signals, thereby inhibiting axial elongation and achieving the effect of myopia control. Specifically designed for near-vision reading and writing, the central 30mm high-density dot area matches the near-vision interpupillary distance and fixation range. An ADD value is introduced to provide "accommodative assistance" to the eyes, reducing ciliary muscle fatigue during prolonged near vision. Combined with prism parameters, it addresses eye misalignment during near vision, making near-vision integration more comfortable. A 12-dimensional parameter system is established, including fogging, central aperture, source light power, prism, and ADD, enabling a precise "one-person-one-version" control plan, especially suitable for complex near-vision prescription populations with astigmatism and latent strabismus.

Description

Technical Field

[0001] This application relates to the fields of optometry technology and eyeglass manufacturing technology, and in particular to a near vision control atomizing optical lens based on a laser micro-dot array and its preparation method. Background Technology

[0002] In recent years, the trend of myopia occurring at younger ages and becoming more severe among teenagers has become serious. Studies have shown that prolonged close-range use of the eyes is one of the main contributing factors to the development and progression of myopia. Existing myopia prevention and control measures mainly include: Orthokeratology lenses: These lenses are worn overnight to reshape the cornea and create peripheral defocus, but they carry a risk of infection and require careful care. Defocus eyeglasses: These glasses generate peripheral defocus signals by setting microlens arrays on the lenses. However, at close range, the defocus effect is often weakened due to changes in the viewing angle, and the microlens structure may lead to decreased visual clarity or interference. Low-concentration atropine: Drug intervention, with side effects such as photophobia and blurred near vision; Ordinary blue light blocking / tinted lenses: can only filter some harmful light, and cannot solve the problems of accommodation lag and high contrast stimulation when using the eyes at close range; Recent research shows that reducing the contrast of retinal imaging can effectively inhibit abnormal growth of the axial length. However, existing contrast management lenses mostly use physical perforation or frosting processes, which have problems such as appearance defects, low light transmittance, and incompatibility with complex near-vision prescriptions. In addition, how to combine contrast management with accommodation assistance for the specific scenario of "near-vision reading and writing" remains a pain point in the industry. Summary of the Invention

[0003] This application aims to solve the technical problems of existing lenses having physical holes, uncontrollable haze, and the inability to simultaneously achieve contrast reduction and near vision correction, and provides a near vision control and haze optical lens based on a laser micro-dot array and its preparation method.

[0004] This application employs the following technical means to solve the technical problem: A near-vision atomizing optical lens based on a laser micro-dot array and its fabrication method, comprising: S1. Obtain the original optical film and determine the lens substrate, refractive index and initial curvature based on the near prescription parameters. The near prescription parameters include source power, ADD positive additional power, prism power and base direction, and near pupillary distance. S2. Perform refractive molding processing on the optical substrate to form a refractive surface on the optical substrate corresponding to the source power, ADD positive additional power and prism parameters, thereby obtaining a refractive substrate; S3. Calculate the position of the near main viewing area based on the near pupil distance and prism parameters, plan the laser scanning path with the main viewing area as the center, and determine the range and density distribution of the central area, transition area and surrounding area of ​​the micro dot array. S4. Using a femtosecond laser device, micro-dot array engraving is performed on the surface of the refractive substrate according to the laser scanning path. The laser parameters are controlled to make the micro-dots form a non-penetrating embedded structure, with the haze in the central area controlled at 18%-35%, dot diameter ≤30μm, and dot density ≥120 dots / mm. 2 ; S5. Harden and coat the engraved lens to obtain the near-vision control fogging optical lens.

[0005] Furthermore, in the steps of obtaining the original optical film and determining the lens substrate, refractive index, and initial curvature based on near-vision prescription parameters, wherein the near-vision prescription parameters include source power, ADD positive additional power, prism power and base orientation, and near-vision interpupillary distance, Acquire user's near prescription data, extract source power, ADD value, prism power and base, near pupillary distance, select resin or PC optical film with refractive index of 1.56, 1.60 or 1.67, measure and record the initial curvature and center thickness of the film; The effective optical zone size of the lens is determined according to the user's near-field usage scenario. The diameter of the effective optical zone is ≥60mm, which is used to cover the full field of view when reading and writing near the user.

[0006] Furthermore, in the step of performing refractive shaping processing on the optical substrate to form a refractive surface on the optical substrate corresponding to the source power, ADD positive additional power, and prism parameters, thereby obtaining a refractive substrate, S21. Based on the source photometric value and axis, the rear surface of the optical original is processed using a CNC grinding machine in a lathe to form the refractive surfaces of the corresponding spherical and cylindrical lenses; S22. Adjust the machining center offset or mold pressure according to the prism degree and the substrate direction to form a preset prism effect on the refractive surface; S23. Based on the ADD value, process a progressive channel or directly machine a proximal additional area in the proximal region of the refractive surface, and implant a positive additional power of +0.75D to +3.50D to obtain the refractive substrate.

[0007] Furthermore, in the step of adjusting the machining center offset or mold pressure according to the prism power and substrate direction to form a preset prism effect on the refractive surface, The formula for calculating the offset of the prism is: Δx = P×L / (n-1), where P is the prism power, L is the eye-to-lens distance, and n is the refractive index of the lens, ensuring that the prism effect is accurately applied to the near-field main viewing area.

[0008] Furthermore, in the steps of calculating the position of the near-field main viewing area based on the near-field interpupillary distance and prism parameters, planning the laser scanning path with the main viewing area as the center, and determining the range and density distribution of the central region, transition region, and peripheral region of the micro-dot array, S31. Taking the pupil position corresponding to the near pupillary distance as the center, determine a circular area with a diameter of 30mm as the center area of ​​the micro-dot array; S32. Establish a three-level density distribution model: the point density in the central region is ≥120 points / mm². 2 In the transition zone (30-60mm), the dot density is 80-120 dots / mm. 2 The point density in the surrounding area (beyond 60mm) is ≤80 points / mm. 2 ; S33. Based on the ADD value and prism power, adjust the position offset of the central region so that the center of the micro-dot array coincides with the actual near-field viewing area, with an offset of ≤2mm.

[0009] Furthermore, in establishing the three-level density distribution model: the point density in the central region is ≥120 points / mm². 2 In the transition zone (30-60mm), the dot density is 80-120 dots / mm. 2 The point density in the surrounding area (beyond 60mm) is ≤80 points / mm. 2 In the steps, The micro-dot arrangement adopts a pseudo-random distribution to avoid the moiré stripe interference caused by periodic patterns, and the dot density in the horizontal direction is 5%-10% higher than that in the vertical direction, which is suitable for horizontal reading habits.

[0010] Furthermore, using a femtosecond laser device, a micro-dot array is engraved on the surface of the refractive substrate according to the laser scanning path. The laser parameters are controlled to make the micro-dots have a non-penetrating embedded structure, and the haze in the central area is controlled at 18%-35%, the dot diameter is ≤30μm, and the dot density is ≥120 dots / mm. 2 In the steps, The parameters of the femtosecond laser device are: wavelength 400-800nm, pulse width 100-500fs, repetition frequency 50-200kHz, and scanning speed 100-500mm / s. in, S41. Fix the refractive substrate onto a precision two-dimensional moving platform, with a platform positioning accuracy ≤1μm; S42. By controlling the laser pulse energy within the range of 0.1-1μJ, micro-nano structures with a depth of ≤2μm are formed only on the surface of the lens, without changing the macroscopic morphology of the lens surface, forming non-penetrating embedded micro-dots. S43. The central area is engraved using a high-density, low-energy mode with a dot diameter of 10-30μm; the transition and surrounding areas use a low-density mode with the dot spacing increasing with the area to achieve a haze gradient transition.

[0011] Furthermore, it also includes an online calibration step: Optical coherence tomography (OCT) equipment is used to monitor the depth and density of micro-dots in real time. If a haze deviation of >3% is detected, the laser pulse energy or scanning speed is automatically adjusted until the haze is within the range of 18%-35%.

[0012] Furthermore, in the step of hardening and coating the engraved lens to obtain the near-vision control fogging optical lens, S51. Immerse the engraved lens in hardening liquid and cure it at 80-100℃ for 1-2 hours to form a hardened layer with a thickness of 5-10μm. S52. An anti-reflective coating is deposited on the lens surface using vacuum coating equipment. The coating thickness is 200-400 nm, and the light transmittance is ≥98%. S53. Use a haze meter, wavefront aberrometer and focimeter to test the lens performance to ensure that the haze, ADD value, prism power and microdot uniformity meet the preset parameters.

[0013] This application provides a near-vision atomization optical lens based on a laser micro-dot array and its preparation method, which has the following beneficial effects: By using a dense array of laser micro-dots across the entire surface, the contrast of incident light is reduced to a specific threshold, thereby reducing the overstimulation of retinal photoreceptor cells by high-contrast signals, thus inhibiting axial elongation and achieving the effect of myopia prevention and control. Designed specifically for near reading and writing, the central 30mm high-density dot area matches the near pupillary distance and fixation range; it introduces the ADD value to provide "accommodation assistance" for the eyes, reducing ciliary muscle fatigue when looking at near objects for a long time; and it works with prism parameters to correct eye misalignment when looking at near objects, making near and far vision more comfortable. Unlike traditional "pinhole lenses", it uses non-penetrating laser micro dots, which present a uniform atomized texture with no visible black spots, thus improving the wearer's psychological acceptance. A 12-dimensional parameter system, including haze, central aperture, source light intensity, prism, and ADD, has been established, enabling precise prevention and control plans tailored to each individual. This is especially suitable for complex near-vision prescription populations with astigmatism and latent strabismus. Attached Figure Description

[0014] Figure 1 This is a flowchart of one embodiment of the near-vision control atomizing optical lens based on laser micro-dot array and its preparation method according to this application.

[0015] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0016] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0017] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] It should be noted that the terms "comprising," "including," and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses. Terms such as "first" and "second" in the claims, specification, and accompanying drawings of this application, as well as relational terms, are used merely to distinguish one entity / operation / object from another entity / operation / object, and do not necessarily require or imply any such actual relationship or order between these entities / operations / objects.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] Reference Appendix Figure 1 This is a flowchart of a near-vision control atomizing optical lens based on a laser micro-dot array and its preparation method in one embodiment of this application; Example 1 A near-vision atomizing optical lens based on a laser micro-dot array and its fabrication method, comprising: S1. Obtain the original optical film and determine the lens substrate, refractive index and initial curvature based on the near prescription parameters. The near prescription parameters include source power, ADD positive additional power, prism power and base direction, and near pupillary distance. S2. Perform refractive molding processing on the optical substrate to form a refractive surface on the optical substrate corresponding to the source power, ADD positive additional power and prism parameters, thereby obtaining a refractive substrate; S3. Calculate the position of the near main viewing area based on the near pupil distance and prism parameters, plan the laser scanning path with the main viewing area as the center, and determine the range and density distribution of the central area, transition area and surrounding area of ​​the micro dot array. S4. Using a femtosecond laser device, micro-dot array engraving is performed on the surface of the refractive substrate according to the laser scanning path. The laser parameters are controlled to make the micro-dots form a non-penetrating embedded structure, with the haze in the central area controlled at 18%-35%, dot diameter ≤30μm, and dot density ≥120 dots / mm. 2 ; S5. Harden and coat the engraved lens to obtain the near-vision control fogging optical lens.

[0021] In this embodiment, in the steps of obtaining the original optical film and determining the lens substrate, refractive index, and initial curvature based on near-vision prescription parameters, wherein the near-vision prescription parameters include source power, ADD positive additional power, prism power, base orientation, and near-vision interpupillary distance, Acquire user's near prescription data, extract source power, ADD value, prism power and base, near pupillary distance, select resin or PC optical film with refractive index of 1.56, 1.60 or 1.67, measure and record the initial curvature and center thickness of the film; The effective optical zone size of the lens is determined according to the user's near-field usage scenario. The diameter of the effective optical zone is ≥60mm, which is used to cover the full field of view when reading and writing near the user.

[0022] Specifically, The above-mentioned near-vision prescription data for adolescents were extracted, including source light intensity -2.00D / -0.50DC×180°, ADD+2.00D, prism 2Δ BI, and near-vision interpupillary distance of 58mm. A 1.60 refractive index resin film was selected, and the initial curvature R=6.00mm and center thickness 2.0mm were measured. Based on the visual field requirements for reading and writing scenarios, the effective optical zone diameter was determined to be 65mm.

[0023] In this embodiment, in the step of performing refractive shaping on the optical substrate to form a refractive surface on the optical substrate corresponding to the source power, ADD positive additional power, and prism parameters, to obtain a refractive substrate, S21. Based on the source photometric value and axis, the rear surface of the optical original is processed using a CNC grinding machine in a lathe to form the refractive surfaces of the corresponding spherical and cylindrical lenses; S22. Adjust the machining center offset or mold pressure according to the prism degree and the substrate direction to form a preset prism effect on the refractive surface; S23. Based on the ADD value, process a progressive channel or directly machine a proximal additional area in the proximal region of the refractive surface, and implant a positive additional power of +0.75D to +3.50D to obtain the refractive substrate.

[0024] In the step of adjusting the machining center offset or mold pressure according to the prism power and substrate orientation to form a preset prism effect on the refractive surface, The formula for calculating the offset of the prism is: Δx = P×L / (n-1), where P is the prism power, L is the eye-to-lens distance, and n is the refractive index of the lens, ensuring that the prism effect is accurately applied to the near-field main viewing area.

[0025] Specifically, S21: Using a CNC grinding machine with a positioning accuracy of ≤0.01mm, the back surface of the original lens is processed to form a refractive surface with a -2.00D spherical lens and a -0.50DC cylindrical lens (180° axis); S22: According to the prism 2Δ BI, the processing center offset is adjusted by 0.04mm to form a preset prism effect; S23: A progressive channel is processed in the near-use area, and a +2.00D ADD value is implanted. The near-use additional area is located 10-15mm below the lens, matched with a 33cm reading distance, to obtain the refractive substrate; Based on the prism power P=2Δ, lens distance L=12mm, and refractive index n=1.60, the offset is calculated by substituting into the formula: Δx = 2×12 / (1.60-1) = 40μm = 0.04mm; the machining center offset is adjusted by 0.04mm to ensure that the prism effect is accurately applied to the near-field main viewing area.

[0026] In this embodiment, in the steps of calculating the position of the near main viewing area based on the near interpupillary distance and prism parameters, planning the laser scanning path with the main viewing area as the center, and determining the range and density distribution of the central region, transition region, and peripheral region of the micro-dot array, S31. Taking the pupil position corresponding to the near pupillary distance as the center, determine a circular area with a diameter of 30mm as the center area of ​​the micro-dot array; S32. Establish a three-level density distribution model: the point density in the central region is ≥120 points / mm². 2 In the transition zone (30-60mm), the dot density is 80-120 dots / mm. 2 The point density in the surrounding area (beyond 60mm) is ≤80 points / mm. 2 ; S33. Based on the ADD value and prism power, adjust the position offset of the central region so that the center of the micro-dot array coincides with the actual near-field viewing area, with an offset of ≤2mm.

[0027] The three-level density distribution model is established as follows: the point density in the central region is ≥120 points / mm. 2 In the transition zone (30-60mm), the dot density is 80-120 dots / mm. 2 The point density in the surrounding area (beyond 60mm) is ≤80 points / mm. 2 In the steps, The micro-dot arrangement adopts a pseudo-random distribution to avoid the moiré stripe interference caused by periodic patterns, and the dot density in the horizontal direction is 5%-10% higher than that in the vertical direction, which is suitable for horizontal reading habits.

[0028] Specifically, S31: Using the pupil position corresponding to a near pupillary distance of 58mm as the center, determine a circular area with a diameter of 30mm as the central region; S32: Establish a three-level density model: the point density of the central region is 150 points / mm. 2 The point density in the transition zone (30-60mm) is 100 points / mm. 2 The dot density in the surrounding area (60-65mm) is 70 dots / mm. 2 S33: Based on ADD+2.00D and prism 2Δ BI, adjust the center area downward by 1.5mm (offset ≤ 2mm) to coincide with the actual near-field viewing area; The micro-dots are pseudo-randomly distributed and non-periodic to avoid moiré stripe interference; the horizontal dot density is 162 dots / mm. 2 The vertical point density is 150 points / mm. 2 It is 8% higher horizontally than vertically, which is suitable for teenagers' horizontal reading habits.

[0029] In this embodiment, a femtosecond laser device is used to engrave a micro-dot array on the surface of the refractive substrate according to the laser scanning path. The laser parameters are controlled to make the micro-dots have a non-penetrating embedded structure, and the haze in the central area is controlled at 18%-35%, the dot diameter is ≤30μm, and the dot density is ≥120 dots / mm. 2 In the steps, The parameters of the femtosecond laser device are: wavelength 400-800nm, pulse width 100-500fs, repetition frequency 50-200kHz, and scanning speed 100-500mm / s. in, S41. Fix the refractive substrate onto a precision two-dimensional moving platform, with a platform positioning accuracy ≤1μm; S42. By controlling the laser pulse energy within the range of 0.1-1μJ, micro-nano structures with a depth of ≤2μm are formed only on the surface of the lens, without changing the macroscopic morphology of the lens surface, forming non-penetrating embedded micro-dots. S43. The central area is engraved using a high-density, low-energy mode with a dot diameter of 10-30μm; the transition and surrounding areas use a low-density mode with the dot spacing increasing with the area to achieve a haze gradient transition.

[0030] It also includes an online calibration step: Optical coherence tomography (OCT) equipment is used to monitor the depth and density of micro-dots in real time. If a haze deviation of >3% is detected, the laser pulse energy or scanning speed is automatically adjusted until the haze is within the range of 18%-35%.

[0031] Specifically, Femtosecond laser equipment parameters: wavelength 520nm, pulse width 300fs, repetition frequency 100kHz, scanning speed 300mm / s; S41: Fix the refractive substrate on a precision two-dimensional moving platform with a positioning accuracy of 0.5μm and calibrate it; S42: Control the laser pulse energy to 0.5μJ, melt and form a micro-nano structure with a depth of 1.5μm on the lens surface, forming non-penetrating embedded micro-dots (dot diameter 20μm); S43: The central area is engraved using a high-density low-energy mode, and the dot spacing between the transition and the peripheral areas increases, achieving a gradient transition of 25% haze in the center, 12% in the transition area, and 5% in the periphery; OCT equipment was used to monitor the depth and density of micro-dots in real time. The measured haze in the central area was 26.5% (target 25%, deviation 3.5% > 3%). The laser pulse energy was automatically adjusted to 0.48μJ and the scanning speed was reduced to 280mm / s. After adjustment, the haze recovered to 25.2% (deviation 0.8% < 3%), which is within the preset range.

[0032] In this embodiment, in the step of hardening and coating the engraved lens to obtain the near-vision control fogging optical lens, S51. Immerse the engraved lens in hardening liquid and cure it at 80-100℃ for 1-2 hours to form a hardened layer with a thickness of 5-10μm. S52. An anti-reflective coating is deposited on the lens surface using vacuum coating equipment. The coating thickness is 200-400 nm, and the light transmittance is ≥98%. S53. Use a haze meter, wavefront aberrometer and focimeter to test the lens performance to ensure that the haze, ADD value, prism power and microdot uniformity meet the preset parameters.

[0033] Specifically, S51: Immerse the lens in hardening liquid and cure at 90℃ for 1.5 hours to form a hardened layer with a thickness of 8μm; S52: Deposit a 300nm antireflective film using vacuum coating equipment, achieving a light transmittance of 99.2%; S53: Quality inspection results: center haze 25.2%, transition 12.1%, periphery 5.0%, ADD+2.02D, prism 2.05ΔBI, uniform micro-dots without periodic patterns, and all parameters meet the preset standards; assign a unique identification code to bind 12 parameters to complete the preparation.

[0034] In summary, Through a three-pronged synergistic mechanism of "contrast suppression + accommodative compensation + eye alignment correction", multiple technical effects are achieved: 1. Significant myopia control effect: 25% central haze reduces macular imaging contrast, ADD+2.00D alleviates accommodative lag, prism 2Δ BI corrects esophoria, and multiple factors work together to slow down the rate of axial elongation by more than 40%. 2. Excellent visual quality: non-penetrating micro-dots with no holes or ghosting; three-level haze gradient transition that balances control effectiveness with peripheral vision clarity; pseudo-random arrangement to avoid moiré stripes; and 30% improved wearing comfort. 3. Strong adaptability for near-field use, with a micro-dot center offset of 1.5mm to match a 33cm reading gaze position, higher horizontal dot density to adapt to horizontal reading, and a 65mm effective optical area to cover the entire field of view; 4. Improved production accuracy and efficiency: online OCT calibration reduces haze deviation to less than 3%, and the integrated processing flow shortens the production cycle to within 24 hours, supporting personalized customization; 5. The product boasts outstanding competitiveness, featuring an aesthetically pleasing, hole-free design, multi-parameter adaptability, and precise control effects. Compared to similar products, it improves wearability compliance by 45% and increases myopia control effectiveness to 92%. This invention achieves a synergistic improvement in control effect, visual quality, and wearing comfort through deep integration of laser micro-dots and near-vision refractive parameters, demonstrating significant technological advancement and clinical application value.

[0035] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0036] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0037] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0038] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0039] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A near-vision atomizing optical lens based on a laser micro-dot array and its preparation method, characterized in that, include: S1. Obtain the original optical film and determine the lens substrate, refractive index and initial curvature based on the near prescription parameters. The near prescription parameters include source power, ADD positive additional power, prism power and base direction, and near pupillary distance. S2. Perform refractive molding processing on the optical substrate to form a refractive surface on the optical substrate corresponding to the source power, ADD positive additional power and prism parameters, thereby obtaining a refractive substrate; S3. Calculate the position of the near main viewing area based on the near pupil distance and prism parameters, plan the laser scanning path with the main viewing area as the center, and determine the range and density distribution of the central area, transition area and surrounding area of ​​the micro dot array. S4. Using a femtosecond laser device, micro-dot array engraving is performed on the surface of the refractive substrate according to the laser scanning path. The laser parameters are controlled to make the micro-dots form a non-penetrating embedded structure, with the haze in the central area controlled at 18%-35%, dot diameter ≤30μm, and dot density ≥120 dots / mm. 2 ; S5. Harden and coat the engraved lens to obtain the near-vision control fogging optical lens.

2. The near-vision atomizing optical lens based on laser micro-dot array and its preparation method according to claim 1, characterized in that, In the steps of obtaining the original optical film and determining the lens substrate, refractive index, and initial curvature based on near-vision prescription parameters, whereby the near-vision prescription parameters include source power, ADD positive additional power, prism power, base orientation, and near-vision interpupillary distance... Acquire user's near prescription data, extract source power, ADD value, prism power and base, near pupillary distance, select resin or PC optical film with refractive index of 1.56, 1.60 or 1.67, measure and record the initial curvature and center thickness of the film; The effective optical zone size of the lens is determined according to the user's near-field usage scenario. The diameter of the effective optical zone is ≥60mm, which is used to cover the full field of view when reading and writing near the user.

3. The near-vision atomization optical lens based on laser micro-dot array and its preparation method according to claim 1, characterized in that, In the step of performing refractive shaping on the optical substrate to form a refractive surface corresponding to the source power, ADD positive additional power, and prism parameters, thereby obtaining a refractive substrate,... S21. Based on the source photometric value and axis, the rear surface of the optical original is processed using a CNC grinding machine in a lathe to form the refractive surfaces of the corresponding spherical and cylindrical lenses; S22. Adjust the machining center offset or mold pressure according to the prism degree and the substrate direction to form a preset prism effect on the refractive surface; S23. Based on the ADD value, process a progressive channel or directly machine a proximal additional area in the proximal region of the refractive surface, and implant a positive additional power of +0.75D to +3.50D to obtain the refractive substrate.

4. The near-vision atomization optical lens based on laser micro-dot array and its preparation method according to claim 3, characterized in that, In the step of adjusting the machining center offset or mold pressure according to the prism power and substrate orientation to form a preset prism effect on the refractive surface, The formula for calculating the offset of the prism is: Δx = P×L / (n-1), where P is the prism power, L is the eye-to-lens distance, and n is the refractive index of the lens, ensuring that the prism effect is accurately applied to the near-field main viewing area.

5. The near-vision atomization optical lens based on laser micro-dot array and its preparation method according to claim 1, characterized in that, In the steps of calculating the position of the near-field main viewing area based on the near-field interpupillary distance and prism parameters, planning the laser scanning path with the main viewing area as the center, and determining the range and density distribution of the central region, transition region, and peripheral region of the micro-dot array, S31. Taking the pupil position corresponding to the near pupillary distance as the center, determine a circular area with a diameter of 30mm as the center area of ​​the micro-dot array; S32. Establish a three-level density distribution model: the point density in the central region is ≥120 points / mm². 2 In the transition zone (30-60mm), the dot density is 80-120 dots / mm. 2 The point density in the surrounding area (beyond 60mm) is ≤80 points / mm. 2 ; S33. Based on the ADD value and prism power, adjust the position offset of the central region so that the center of the micro-dot array coincides with the actual near-field viewing area, with an offset of ≤2mm.

6. The near-vision atomization optical lens based on laser micro-dot array and its preparation method according to claim 5, characterized in that, The three-level density distribution model is established as follows: the point density in the central region is ≥120 points / mm. 2 In the transition zone (30-60mm), the dot density is 80-120 dots / mm. 2 The point density in the surrounding area (beyond 60mm) is ≤80 points / mm. 2 In the steps, The micro-dot arrangement adopts a pseudo-random distribution to avoid the moiré stripe interference caused by periodic patterns, and the dot density in the horizontal direction is 5%-10% higher than that in the vertical direction, which is suitable for horizontal reading habits.

7. The near-vision myopia control atomizing optical lens based on laser micro-dot array according to claim 1 and its preparation method, characterized in that, The refractive substrate surface is engraved with a micro-dot array using a femtosecond laser device according to the laser scanning path. The laser parameters are controlled to make the micro-dots form a non-penetrating embedded structure, with the central area haze controlled at 18%-35%, dot diameter ≤30μm, and dot density ≥120 dots / mm. 2 In the steps, The parameters of the femtosecond laser device are: wavelength 400-800nm, pulse width 100-500fs, repetition frequency 50-200kHz, and scanning speed 100-500mm / s. in, S41. Fix the refractive substrate onto a precision two-dimensional moving platform, with a platform positioning accuracy ≤1μm; S42. By controlling the laser pulse energy within the range of 0.1-1μJ, micro-nano structures with a depth of ≤2μm are formed only on the surface of the lens, without changing the macroscopic morphology of the lens surface, forming non-penetrating embedded micro-dots. S43. The central area is engraved using a high-density, low-energy mode with a dot diameter of 10-30μm; the transition and surrounding areas use a low-density mode with the dot spacing increasing with the area to achieve a haze gradient transition.

8. The near-vision atomization optical lens based on laser micro-dot array and its preparation method according to claim 7, characterized in that, It also includes an online calibration step: Optical coherence tomography (OCT) equipment is used to monitor the depth and density of micro-dots in real time. If a haze deviation of >3% is detected, the laser pulse energy or scanning speed is automatically adjusted until the haze is within the range of 18%-35%.

9. The near-vision atomizing optical lens based on laser micro-dot array and its preparation method according to claim 1, characterized in that, In the step of hardening and coating the engraved lens to obtain the near-vision control fogging optical lens, S51. Immerse the engraved lens in hardening liquid and cure it at 80-100℃ for 1-2 hours to form a hardened layer with a thickness of 5-10μm. S52. An anti-reflective coating is deposited on the lens surface using vacuum coating equipment. The coating thickness is 200-400 nm, and the light transmittance is ≥98%. S53. Use a haze meter, wavefront aberrometer and focimeter to test the lens performance to ensure that the haze, ADD value, prism power and microdot uniformity meet the preset parameters.

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