A dual-layer dynamic-compensation composite defocus lens
By using a dual-layer dynamic compensation composite defocus lens design, the microlens arrays of the front and rear lens layers work together to solve the problem of unstable defocus effect of single-layer lenses when the eye moves, achieving a stable, comfortable and efficient myopia control effect across the entire field of vision.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU MINGHUI VISION TECH CO LTD
- Filing Date
- 2025-10-22
- Publication Date
- 2026-07-21
AI Technical Summary
Existing single-layer defocus lenses have unstable defocusing effects when the eye moves, resulting in blind spots and a sense of jump in vision. Their design freedom is limited, making it difficult to optimize various aberrations at the same time.
The design employs a dual-layer dynamic compensation composite defocus lens, with the front and rear lens layers fixed together by an optical adhesive layer. The front lens layer is equipped with a first microlens array, and the rear lens layer is equipped with a second microlens array. The two are aligned in space to form an integrated micro-optical unit, and the optical parameters are configured to stabilize the defocus spot and compensate for the defocus amount change caused by oblique incidence.
It achieves stable defocus across the entire field of view, improves wearing comfort and safety, enhances design freedom, reduces lens thickness and aberrations, and optimizes visual quality.
Smart Images
Figure CN224536299U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ophthalmic optics and optometry, and more specifically, to a dual-layer dynamic compensation composite defocus lens. Background Technology
[0002] Myopia, especially pathological high myopia, has become a major global public health problem. Its fundamental mechanism lies in the excessive elongation of the eye axis. While traditional single-vision lenses can correct central vision, they can cause "hyperopic defocus" in the peripheral vision. This signal has been shown to stimulate further elongation of the eye axis, exacerbating the development of myopia.
[0003] To combat peripheral hyperopic defocus, defocus lenses were developed. These lenses use microlenses with positive focal power in the peripheral area of the lens to focus peripheral light in front of the retina, creating "myopic defocus" and thus inhibiting axial elongation. The mainstream design involves fabricating a microlens array on a single surface of a single-layer lens.
[0004] However, existing single-layer defocus lenses have several inherent drawbacks:
[0005] Instability of defocus effect: The defocus effect of the lens is designed based on perpendicular light incidence (i.e., the eye looking straight ahead). When the eye moves to view objects to the side, light enters the microlens at a large angle. This introduces additional astigmatism and field curvature, causing the defocused spot to deform and diffuse, and the defocus amount to deviate from the design value, greatly reducing the control effect.
[0006] Blind spots and jerky transitions: There is usually an abrupt transition between the microlens area and the central optical area. When the line of sight quickly sweeps across this boundary, a noticeable jerky transition and blurriness can be felt, causing dizziness and affecting wearing comfort, especially posing a safety hazard during dynamic activities.
[0007] Design freedom constraints: All optical functions (basic refractive power, defocus, aberration control) are concentrated on the two surfaces of a single lens, which limits design freedom and makes it difficult to optimize various aberrations simultaneously. Utility Model Content
[0008] To address the aforementioned deficiencies in the prior art, this utility model provides a dual-layer dynamic compensation composite defocus lens, comprising:
[0009] The system comprises a front lens layer and a rear lens layer, which are fixed together by an optical adhesive layer. The front lens layer includes an outer front surface and an inner front surface. The outer front surface is a refractive surface for correcting central refractive errors, and a first microlens array is disposed on the inner front surface. The rear lens layer includes a outer rear surface and an inner rear surface. A second microlens array is disposed on the outer rear surface, and the inner rear surface is spherical or aspherical. Each microlens in the second microlens array is spatially aligned with a corresponding microlens in the first microlens array, forming an integrated micro-optical unit. The optical parameters of the first and second microlens arrays are configured such that when a composite ray passes through one of the integrated micro-optical units, a stable additional defocus spot is generated. Furthermore, when the ray is incident at an angle deviating from the optical axis, the integrated micro-optical unit can compensate for the change in defocus caused by oblique incidence, so that the focal position of the additional defocus spot remains relatively stable.
[0010] Preferably, at least one of the first microlens array and the second microlens array is an aspherical microlens array or a freeform microlens array.
[0011] Preferably, the equivalent defocus power of the integrated micro-optical unit is in the range of +1.00D to +5.00D.
[0012] Preferably, the microlenses in the first microlens array are arranged in a hexagonal close-packed, square, or random arrangement.
[0013] Preferably, the microlenses in the second microlens array are arranged in a hexagonal close-packed, square, or random arrangement.
[0014] Preferably, the refractive index of the optical adhesive layer matches the refractive indices of the front lens layer and the rear lens layer.
[0015] Preferably, the front lens layer is made of resin material, polycarbonate material or cyclic olefin copolymer material.
[0016] Preferably, the rear lens layer is made of resin material, polycarbonate material or cyclic olefin copolymer material.
[0017] Preferably, the lens further includes a central optical zone in which the corresponding positions of the anterior inner surface and / or posterior outer surface are not provided with microlens arrays, forming a clear visual channel for refractive correction only on the anterior outer surface and posterior inner surface.
[0018] Preferably, the front lens layer and / or optical adhesive layer are made of photochromic material, or a polarizing film is laminated on the front outer surface.
[0019] The dual-layer dynamic compensation composite defocus lens of this invention has the following beneficial effects:
[0020] (1) It has a stable defocus effect across the entire field of vision: It effectively solves the industry problem of weakened or ineffective defocus signal when the eye moves. It ensures that when the wearer looks at objects to the side, the peripheral retina can still receive effective myopia defocus stimulation. Theoretically, it can achieve all-weather, all-angle control effect, and is expected to greatly improve the efficiency of myopia delay.
[0021] (2) High visual quality and comfort: Due to the stability of the defocus, the image shaking and blurring caused by eye movement are avoided, resulting in a smoother visual perception. At the same time, the transition between the central optical zone and the defocus zone can be designed to be smoother, reducing the "jumping sensation" and significantly improving wearing comfort and safety under dynamic vision.
[0022] (3) Higher design freedom: The optical functions are distributed to the four surfaces of the two lens layers, providing more design variables (four curved surfaces), which can better balance and optimize the basic refractive correction, defocus function and the correction of various aberrations (such as spherical aberration and coma), thereby designing products with better overall optical performance.
[0023] (4) It can reduce lens thickness and aberrations: Compared with simply increasing the height of the microlens to obtain a high defocus amount, this utility model can reduce the surface steepness of each microlens by distributing the optical power of the two layers of microlenses, which is conducive to reducing lens thickness and reducing advanced aberrations. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. The utility model will be further described below in conjunction with the drawings and embodiments. In the drawings:
[0025] Figure 1 This is a schematic diagram of the structure of the double-layer dynamic compensation composite defocus lens of this utility model;
[0026] Figure 2 This is a schematic diagram of the structure of the integrated micro-optical unit 40, in which each microlens in the second microlens array of the dual-layer dynamic compensation composite defocus lens of this utility model is spatially aligned with the corresponding microlens in the first microlens array.
[0027] Figure 3This is a graph showing how the defocus amount changes with the increase of the field of view in the dual-layer dynamic compensation composite defocus lens of this utility model, and a schematic diagram comparing this embodiment with the traditional single-layer lens.
[0028] In the figure, 10-front lens layer, 11-front outer surface (for refractive correction), 12-front inner surface, 121-first microlens array, 20-optical adhesive layer, 30-rear lens layer, 31-rear outer surface, 311-second microlens array, 32-rear inner surface, 40-integrated micro-optical unit. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0032] Please see Figure 1 This is a schematic diagram of the structure of the double-layer dynamic compensation composite defocus lens of this utility model. Figure 1As shown, a front lens layer 10 and a rear lens layer 30 are fixed together by an optical adhesive layer 20. The front lens layer 10 includes an outer front surface 11 and an inner front surface 12. The outer front surface 11 is a refractive surface for correcting central refractive errors, and a first microlens array 121 is disposed on the inner front surface 12. The rear lens layer 30 includes a outer rear surface 31 and a inner rear surface 32. A second microlens array is disposed on the outer rear surface 31, and the inner rear surface 32 is spherical or aspherical. The second microlens array... Each microlens in the array is spatially aligned with the corresponding microlens in the first microlens array 121, together forming an integrated micro-optical unit 40; the optical parameters of the first microlens array 121 and the second microlens array are configured such that when the composite light passes through an integrated micro-optical unit 40, a stable additional defocus spot is generated; and when the light is incident at an angle deviating from the optical axis, the integrated micro-optical unit 40 can compensate for the change in defocus caused by oblique incidence, so that the focal position of the additional defocus spot remains relatively stable.
[0033] The anterior lens layer 10 is located at the front of the entire lens system (away from the eyeball). Its anterior outer surface 11 is designed as a conventional refractive corrective surface (which can be spherical, aspherical, or toric) to correct the wearer's myopia, hyperopia, and / or astigmatism, ensuring clear central vision. A first microlens array 121 is machined on its anterior inner surface 12. This array consists of a large number of micron-sized lenticules.
[0034] The posterior lens layer 30 is located at the rear of the entire lens system (closest to the eyeball). A second microlens array is machined on its posterior outer surface 31. This array is spatially aligned with the first microlens array 121, meaning each second microlens corresponds one-to-one with a first microlens on the anterior inner surface 12, aligned on the optical axis, together forming an integrated micro-optical unit 40. Its posterior inner surface 32 is the base curve surface adapted to the eyeball, typically spherical or aspherical, and may also include partial refractive correction functionality.
[0035] The optical adhesive layer 20 is composed of an optical adhesive with high light transmittance and high refractive index matching. It firmly bonds the inner front surface 12 of the front lens layer 10 to the outer rear surface 31 of the rear lens layer 30, forming a single optical device. The adhesive layer eliminates the air gap between the two microarrays, avoiding unnecessary reflections and stray light.
[0036] At least one of the first microlens array 121 and the second microlens array is an aspherical microlens array or a freeform microlens array. The aspherical design allows for more precise control of light focusing. Compared to the traditional spherical design, it effectively reduces aberrations, resulting in a clearer and more accurate focal point on the retina. The freeform microlens array further overcomes the limitations of traditional designs, enabling personalized light control based on the physiological characteristics and visual needs of different areas of the eye. This highly customized design allows the lens to provide superior optical performance from different viewing angles, greatly enhancing the wearer's visual experience. Whether looking at a book or computer screen up close, or at distant scenery, the wearer can enjoy a clear and comfortable visual effect.
[0037] The integrated micro-optical unit 40 has an equivalent defocus power ranging from +1.00D to +5.00D. Defocus power is one of the key factors affecting the rate of myopia progression. By setting the defocus power appropriately within this range, an effective defocus signal can be formed in front of the retina, thereby inhibiting excessive elongation of the axial length and slowing down the progression of myopia. At the same time, this range provides sufficient defocus effect to achieve the control purpose without causing visual discomfort to the wearer due to excessive defocus, such as blurred vision or dizziness. It ensures both control effectiveness and wearing comfort.
[0038] The microlenses in the first microlens array 121 are arranged in hexagonal close-packed, square, or random patterns. Hexagonal close-packed microlenses have the highest fill rate, allowing for more microlenses to be arranged within a limited space, thus distributing the defocus effect more evenly and providing more stable and continuous optical performance. Square patterns offer regularity and symmetry, facilitating fabrication and design, while also providing good defocus distribution. Random patterns simulate the light distribution in the natural environment, reducing optical interference that may arise from regular patterns, making the wearer more visually comfortable and reducing visual fatigue that may occur due to the regular structure.
[0039] The microlenses in the second microlens array are arranged in hexagonal close-packed, square, or random patterns. Similar to the first microlens array 121, the microlenses in the second microlens array are arranged in hexagonal close-packed, square, or random patterns, which can also optimize the optical performance of the lens from different angles. The choice of multiple arrangement methods allows the lenses to be flexibly matched according to different design needs and usage scenarios to achieve the best myopia control and vision correction effects. Regardless of the arrangement method, it ensures that the microlenses cooperate with each other to provide the wearer with a clear and comfortable visual experience.
[0040] The refractive index of the optical adhesive layer 20 matches that of the front lens layer 10 and the rear lens layer 30. When the refractive index of the adhesive layer matches that of the lens layers, light can pass through the lens more smoothly, reducing interface reflections caused by refractive index mismatch, thereby improving the lens's light transmittance. Higher light transmittance means more light reaches the retina, making the image seen by the wearer brighter and clearer. At the same time, reduced reflection and scattering also help reduce glare and ghosting, improving visual quality, especially in bright light environments, allowing the wearer to see objects more comfortably.
[0041] The front lens layer 10 is made of resin, polycarbonate, or cyclic olefin copolymer. The rear lens layer 30 is made of resin, polycarbonate, or cyclic olefin copolymer.
[0042] Resin materials are lightweight, making them more comfortable to wear and less likely to put pressure on the bridge of the nose and ears, making them especially suitable for extended wear. Polycarbonate materials have extremely high impact resistance, providing reliable protection for the eyes, making them suitable for sports enthusiasts or people engaged in high-risk work. Cycloolefin copolymer materials have good optical properties and chemical stability, are not easily deformed or discolored, and can ensure the optical quality of the lenses over long-term use. The combined use of these materials allows the lenses to meet vision correction needs while also ensuring safety, comfort, and durability.
[0043] In practice, the lens also includes a central optical zone where the corresponding positions on the anterior inner surface 12 and / or the posterior outer surface 31 are not equipped with microlens arrays, forming a clear visual channel for refractive correction solely through the anterior outer surface 11 and the posterior inner surface 32. This design provides the wearer with a stable and clear visual area, ensuring central visual acuity when focusing on objects. Whether reading, writing, or performing other fine motor tasks, the central optical zone provides accurate and clear visual information, avoiding interference that may be caused by microlens arrays, and improving visual stability and comfort.
[0044] In practice, the front lens layer 10 and / or optical adhesive layer 20 can be made of photochromic material, or a polarizing film can be laminated onto the front outer surface 11. This allows for comprehensive light management and visual protection: myopia control involves more than just defocusing; it also requires avoiding the stimulation of harmful light. The photochromic function makes the lens transparent indoors and automatically darkens under strong outdoor light, effectively blocking glare and excessive ultraviolet rays, reducing photophobia and squinting, and providing comprehensive protection for the eyes from ultraviolet to visible light. The polarization function can effectively eliminate reflected glare from surfaces such as water, roads, and glass, greatly improving visual comfort and clarity, especially suitable for children's outdoor sports (such as cycling, skiing, and ball games). This also improves the stability of the defocus effect: in strong light environments, the pupil constricts, increasing the depth of field, which may slightly affect the presentation of the defocus effect. Reducing the total amount of light entering the eye and glare through photochromic or polarization functions helps maintain the relative stability of the pupil size, thereby providing a more consistent optical environment for the formation of the defocus spot and indirectly optimizing the stability of the defocus effect.
[0045] Figure 2 This is a schematic diagram of the integrated micro-optical unit 40, formed by aligning each microlens in the second microlens array of the dual-layer dynamic compensation composite defocus lens of this invention with the corresponding microlens in the first microlens array 121 in space. In this invention, light rays from the dual-layer dynamic compensation composite defocus lens are obliquely incident on the integrated micro-optical unit 40 at an angle θ. After refraction by the two layers of microlenses, the outgoing light rays still converge at nearly the same position in front of the retina.
[0046] Figure 3 This is a graph showing the change in defocus amount as the field of view increases in the dual-layer dynamic compensation composite defocus lens of this invention, and a schematic diagram comparing this embodiment with a traditional single-layer lens. Figure 3 As shown, the X-axis is the field of view angle θ, and the Y-axis is the defocus amount ΔD. Figure (1) shows that the defocus amount ΔD curve of a traditional single layer decreases rapidly as the field of view angle θ increases; Figure (2) shows that the defocus amount ΔD curve in this embodiment remains relatively flat as the field of view angle θ increases, with very little fluctuation.
[0047] The manufacturing process of this embodiment is as follows:
[0048] (1) Lens processing: The molds for the front lens layer 10 and the rear lens layer 30 are processed using an ultra-precision single-point diamond lathe.
[0049] Mold for front lens layer 10: The aspherical refractive surface of the front outer surface 11 is processed on one side of the cavity, and the negative shape of the first microlens array 121 is processed on the other side.
[0050] Mold for rear lens layer 30: The negative shape of the second microlens array 311 is machined on one side of the cavity, and the base arc surface of the rear inner surface 32 is machined on the other side.
[0051] (2) Injection molding: The front lens layer 10 and the rear lens layer 30 are produced in batches through injection molding process.
[0052] (3) Alignment and bonding: Under the precision alignment device, the rear outer surface 31 of the rear lens layer 30 is coated with optical adhesive, and then aligned with the front inner surface 12 of the front lens layer 10 (to ensure that the center of the microlens unit is aligned), pressure is applied and ultraviolet light is used for curing to form a solid whole.
[0053] The optical design in this embodiment can be:
[0054] Central optical zone: Within a 5mm diameter area at the center of the lens, the height of the microlenses in the first microlens array 121 and the second microlens array 311 gradually becomes zero, forming a clear window that is composed of only the anterior outer surface 1111 and the posterior inner surface 3232, which constitute the refractive system.
[0055] Integrated micro-optical unit 40(40): The target equivalent defocus is +3.00D. The first microlens 121 is a plano-convex aspherical lens with positive optical power, contributing +2.00D. The second microlens 311 is a plano-convex aspherical lens with positive optical power, contributing +1.00D.
[0056] By optimizing the conic constants and higher-order coefficients of the two aspherical surfaces, the equivalent defocusing amount of this integrated micro-optical unit is controlled within ±0.25D over a field of view ranging from 0° to 30°. In contrast, a conventional single-layer +3.00D microlens, as a comparison, may experience a defocusing amount attenuation exceeding 1.00D at a 30° oblique incidence.
[0057] The working principle of this embodiment is as follows:
[0058] Orthogonal view: When the wearer looks straight ahead, parallel light rays are incident perpendicularly on the integrated micro-optical unit 40. The light rays are converged twice by the first microlens 121 and the second microlens 311, and are given a stable defocus amount of +3.00D, ultimately forming a concentrated defocused spot in front of the retina.
[0059] When the wearer moves their eyes to look at an object to the side, the main ray is incident obliquely at an angle θ onto the integrated micro-optical unit 40. Oblique incidence itself leads to a decrease in the effective optical power of a single lens. However, in this embodiment, the decrease in optical power and aberrations caused by oblique incidence in the first microlens 121 are compensated and offset to a certain extent by the second microlens 311. Through the dynamic balancing of the two stages of lenses, the outgoing light rays can still converge in front of the retina at a position very close to that of normal vision, and the shape and energy concentration of the defocused spot are also better maintained. This achieves the core function of dynamic compensation, ensuring the effectiveness of the defocused signal across the entire field of view.
[0060] The core of this invention lies not in simple double-layer stacking, but in the paired design and coordinated operation of the two microlens arrays. It's not just about enabling the integrated micro-optical unit to generate the target defocus amount (e.g., +2.50D) upon normal incidence, but more importantly, optimizing its defocus amount-field-angle curve. That is, when light is incident at different angles (simulating eye movement), the integrated micro-optical unit can dynamically compensate for the defocus shift and increased aberration caused by oblique incidence through the combination of the optical power of the two microlenses, ensuring that the output defocus spot maintains a relatively stable focus position and shape throughout the entire designed field of view (e.g., ±30°).
[0061] The beneficial effects of this utility model, through the design of the above embodiments, are as follows:
[0062] (1) It has a stable defocus effect across the entire field of vision: It effectively solves the industry problem of weakened or ineffective defocus signal when the eye moves. It ensures that when the wearer looks at objects to the side, the peripheral retina can still receive effective myopia defocus stimulation. Theoretically, it can achieve all-weather, all-angle control effect, and is expected to greatly improve the efficiency of myopia delay.
[0063] (2) High visual quality and comfort: Due to the stability of the defocus, the image shaking and blurring caused by eye movement are avoided, resulting in a smoother visual perception. At the same time, the transition between the central optical zone and the defocus zone can be designed to be smoother, reducing the sense of jump and significantly improving wearing comfort and safety under dynamic vision.
[0064] (3) Higher design freedom: The optical functions are distributed to the four surfaces of the two lens layers, providing more design variables (four curved surfaces), which can better balance and optimize the basic refractive correction, defocus function and the correction of various aberrations (such as spherical aberration and coma), thereby designing products with better overall optical performance.
[0065] (4) It can reduce lens thickness and aberrations: Compared with simply increasing the height of the microlens to obtain a high defocus amount, this utility model can reduce the surface steepness of each microlens by distributing the optical power of the two layers of microlenses, which is conducive to reducing lens thickness and reducing advanced aberrations.
[0066] This utility model has been described based on specific embodiments, but those skilled in the art will understand that various changes and equivalent substitutions can be made without departing from the scope of this utility model. Furthermore, to adapt to specific applications of this utility model, numerous modifications can be made without departing from its protection scope. Therefore, this utility model is not limited to the specific embodiments disclosed herein, but includes all embodiments falling within the protection scope of the claims.
Claims
1. A dual-layer dynamic compensation composite defocus lens, characterized in that, include: The system comprises a front lens layer and a rear lens layer, which are fixed together by an optical adhesive layer. The front lens layer includes an outer front surface and an inner front surface. The outer front surface is a refractive surface for correcting central refractive errors, and a first microlens array is disposed on the inner front surface. The rear lens layer includes a outer rear surface and an inner rear surface. A second microlens array is disposed on the outer rear surface, and the inner rear surface is spherical or aspherical. Each microlens in the second microlens array is spatially aligned with a corresponding microlens in the first microlens array, forming an integrated micro-optical unit. The optical parameters of the first and second microlens arrays are configured such that when a composite ray passes through one of the integrated micro-optical units, a stable additional defocus spot is generated. Furthermore, when the ray is incident at an angle deviating from the optical axis, the integrated micro-optical unit can compensate for the change in defocus caused by oblique incidence, so that the focal position of the additional defocus spot remains relatively stable.
2. The dual-layer dynamic compensation composite defocus lens according to claim 1, characterized in that, At least one of the first microlens array and the second microlens array is an aspherical microlens array or a freeform microlens array.
3. The dual-layer dynamic compensation composite defocus lens according to claim 1, characterized in that, The equivalent defocus power of the integrated micro-optical unit is in the range of +1.00D to +5.00D.
4. The dual-layer dynamic compensation composite defocus lens according to claim 1, characterized in that, The microlenses in the first microlens array are arranged in hexagonal close-packed, square, or random patterns.
5. The dual-layer dynamic compensation composite defocus lens according to claim 1, characterized in that, The microlenses in the second microlens array are arranged in hexagonal close-packed, square, or random patterns.
6. The dual-layer dynamic compensation composite defocus lens according to claim 1, characterized in that, The refractive index of the optical adhesive layer matches the refractive indices of the front and rear lens layers.
7. The dual-layer dynamic compensation composite defocus lens according to claim 1, characterized in that, The front lens layer is made of resin material, polycarbonate material or cyclic olefin copolymer material.
8. The dual-layer dynamic compensation composite defocus lens according to claim 1, characterized in that, The rear lens layer is made of resin material, polycarbonate material or cyclic olefin copolymer material.
9. The dual-layer dynamic compensation composite defocus lens according to any one of claims 1 to 8, characterized in that, The lens also includes a central optical zone in which no microlens array is provided at the corresponding positions of the anterior inner surface and / or posterior outer surface, forming a clear visual channel for refractive correction only on the anterior outer surface and posterior inner surface.
10. The dual-layer dynamic compensation composite defocus lens according to claim 9, characterized in that, The front lens layer and / or optical adhesive layer are made of photochromic material, or a polarizing film is laminated on the front outer surface.