Progressive multi-focus multi-point out-of-focus convergence lens and design method thereof
By designing a progressive multifocal multi-point defocusing and converging lens, combining a distance vision zone, a near vision zone, and a progressive channel, and utilizing a convex microlens unit designed with optical axis deflection, the visual discomfort and unstable defocus signal of existing lenses when switching between near and far distances are solved, achieving a stable myopic defocus effect and a comfortable visual experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 马卫国
- Filing Date
- 2026-03-28
- Publication Date
- 2026-05-12
AI Technical Summary
Existing progressive multifocal lenses cannot produce effective peripheral defocus, and multi-point defocus lenses have unstable defocus signals when viewing close objects, resulting in a large adjustment load and making it difficult to balance the optimization of adjustment function with the stability of the defocus signal.
A progressive multifocal multi-point defocusing and converging lens is designed, including a distance vision zone, a near vision zone, and a progressive channel. It combines multiple convex microlens units and forms a stable myopic defocus signal on the retina through optical axis deflection design, optimizes the distribution characteristics of the defocus signal, and achieves a smooth transition using the progressive channel.
It achieves a smooth transition when viewing objects at far, medium, and near distances, reduces visual fatigue, enhances the stability and accuracy of defocus signals in near-vision scenarios, is suitable for wearers with different refractive states, and takes into account both prevention and control of myopia.
Smart Images
Figure CN122018177A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of lens technology, and more specifically, to a progressive multifocal multi-point defocusing converging lens and its design method. Background Technology
[0002] Eyeglass lenses are the core optical components of eyeglasses. They are mostly made of optical resin, glass and other materials through precision processing. By controlling the path of light propagation, they correct refractive errors such as myopia, hyperopia and astigmatism. Lenses can be divided into single vision lenses, progressive multifocal lenses, defocus control lenses and other types.
[0003] When the retina receives peripheral hyperopic defocus signals, it stimulates axial elongation, while myopic defocus can inhibit excessive axial elongation. Multi-point defocus lenses generate continuous myopic defocus by distributing multiple microlenses on the lens; progressive multifocal lenses reduce accommodative lag through gradual changes in lens power. However, all existing lens types have certain limitations. While progressive multifocal lenses can achieve gradual changes in power for near, intermediate, and far distances, reducing accommodative load when viewing near objects, they cannot form an effective myopic defocus signal on the peripheral retina. Multi-point defocus lenses, although generating peripheral myopic defocus signals, cannot achieve gradual changes in power, especially when viewing near objects, requiring significant accommodative effort and leading to unstable defocus signals. Both of these types of lenses have limited functions and cannot simultaneously optimize accommodative function and stabilize defocus signals. Summary of the Invention
[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a progressive multifocal multi-point defocusing and converging lens and its design method, so as to solve the technical problems that existing progressive multifocal lenses cannot generate effective peripheral defocus, and that existing defocusing lenses have unstable defocus signals and large adjustment load when viewing near objects.
[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A progressive multifocal multi-point defocusing converging lens includes a lens substrate with refractive correction function. The lens substrate includes a distance vision zone located at the upper part of the lens, a near vision zone located at the lower part of the lens, and a progressive channel connecting the distance and near vision zones, with the refractive power gradually changing in the vertical direction. The distance vision zone provides the refractive power required for distance vision, the near vision zone provides the refractive power required for near vision, and the progressive channel facilitates a smooth transition from distance to near vision, reducing accommodative load during near vision while providing a clear and comfortable visual experience at distance, intermediate, and near distances.
[0006] Based on the aforementioned lens matrix, multiple convex microlens units are distributed in the area outside the photopic zone of the distance vision zone, the progressive channel, and the near vision zone. These multiple convex microlens units are provided with additional vertex power to create a myopic defocus signal on the human retina, thereby suppressing excessively rapid axial elongation.
[0007] Furthermore, the optical axes of the multiple convex microlens units are not all parallel to the optical axis of the lens substrate, but are deflected towards their respective optical centers depending on their location. Specifically: The convex microlens units located on the temporal and nasal sides of the lens have their optical axes deflected towards the geometric center of the lens. The convex microlens unit located on the periphery of the bright vision zone in the far-field light area has its optical axis deflected towards the optical center of the far-field light area. The convex microlens unit located on the periphery of the near-light zone has its optical axis deflected towards the optical center of the near-light zone.
[0008] This design creates three myopic defocus arcs converging in front of the retina: the distance vision zone, the near vision zone, and the peripheral zone. When the human eye views objects at different distances, especially when the eye's accommodation is reduced for near vision, a stable and effective myopic defocus effect can still be achieved. The underlying principle is that the human retina has a curved shape. If the optical axes of all microlenses are aligned parallel, the landing point of the defocused light rays on the retina will shift with changes in viewing angle, making it difficult to form a stable and uniform myopic defocus area. This invention deflects the optical axes of the microlenses towards their respective optical centers, allowing the defocused light rays from different areas to be precisely projected onto the predetermined curved surface in front of the retina, thereby improving both the spatial accuracy and intensity stability of the defocus signal.
[0009] To further optimize the distribution characteristics of the defocus signal, the convex microlens unit is equipped with an additional vertex power, which gradually changes from the distance vision zone to the near vision zone, either continuously or discontinuously, and generally increases from the distance vision zone to the near vision zone. This design is based on the following technical understanding: when the wearer is looking at near objects, their eyes need to exert a large amount of accommodation, and existing defocus lenses have poor stability and intensity of the defocus signal in this scenario, thus affecting the myopia control effect.
[0010] Therefore, setting up microlens units with higher density and stronger refractive power around the near vision zone can ensure that a sufficiently strong and stable myopic defocus signal is generated in near vision scenarios; while appropriately reducing the density and refractive power of microlenses in the distance vision zone can avoid unnecessary interference with distance vision.
[0011] As a preferred embodiment, in the distance vision zone, the additional vertex power D1 of a single convex microlens unit is +2.00D to +5.00D; in the near vision zone, the additional vertex power D2 of a single convex microlens unit is +4.00D to +7.50D, and D2>D1, D2-D1=+2.00D±0.50D. Based on the refractive power value of the distance vision zone, the additional vertex power of the convex microlens units in the distance vision zone, near vision zone, and peripheral zone is set individually. The numerical range has been verified by optical simulation and clinical experiments, and can achieve the best peripheral defocus effect while ensuring clear central vision.
[0012] Furthermore, the deflection angle α of the optical axis of the convex microlens unit relative to the normal of the lens substrate satisfies: 0° < α ≤ 25°, and the deflection angle α increases with the increase of the distance between the convex microlens unit and the optical center corresponding to its region. The technical principle is that the closer the light is to the edge of the lens, the larger the incident angle, requiring a greater deflection to accurately converge it in front of the retina. Through this deflection design that gradually increases from the inside out, defocused light rays throughout the entire field of view can converge onto the same virtual curved surface in front of the retina, forming a uniform and continuous myopic defocus zone.
[0013] As a more preferred embodiment, the convex microlens unit located on the periphery of the bright vision zone of the far-use light zone has an optical axis deflection angle α relative to the optical axis of the bright vision zone of the far-use light zone that satisfies: 0° < α ≤ 20°. The convex microlens unit located on the periphery of the near-light zone and the bright-view zone has an optical axis deflection angle α relative to the optical axis of the near-light zone and the bright-view zone, satisfying the condition: 0° < α ≤ 20°. This preferred range further balances the defocusing effect with the feasibility of the manufacturing process.
[0014] Furthermore, the convex microlens units are arranged in concentric rings radially around the periphery of the far-field and near-field lighting areas, in fan-shaped rings on both sides of the progressive channel, and in concentric rings radially around the periphery. This arrangement ensures the uniformity of the defocus signal in the 360° direction and adapts to the special geometry of the progressive channel region, achieving seamless coverage of the entire field of view.
[0015] Furthermore, the diameter of the convex microlens unit is preferably 0.5 mm to 1.5 mm, and the center-to-center distance between adjacent convex microlens units is preferably 1.0 mm to 3.0 mm; The convex microlens unit is one or more of the following: circular, elliptical, or polygonal. The convex microlens unit is formed on the front and / or rear surface of the lens substrate by nanoimprinting or injection molding, and the progressive channel is located on the front or rear surface of the lens.
[0016] The above design ensures that this technical solution has good process feasibility and mass production stability.
[0017] This invention also provides a design method for a progressive multifocal multi-point defocusing converging lens, comprising the following steps: S1. Based on the wearer's prescription parameters, design a lens matrix that provides a basic refractive power, the lens matrix including a distance vision zone, a near vision zone, and a progressive channel connecting the two; S2. On the surface of the lens substrate, a defocus region for distributing convex microlens units is defined, the defocus region including the peripheral region of the far-field bright vision zone, the peripheral region of the near-field bright vision zone, the regions on both sides of the progressive channel, and the peripheral region. S3. Based on the curved morphology of the human retina, establish an optical axis deflection distribution model, and calculate the optical axis deflection direction and angle of the required convex microlens unit at different positions in the defocused area; S4. According to the optical axis deflection distribution model, convex microlens units are arranged in the defocus area, such that the optical axis of the convex microlens unit located on the periphery of the far-use light area is deflected to converge at the optical center of the far-use light area, the optical axis of the convex microlens unit located on the periphery of the near-use light area is deflected to converge at the optical center of the near-use light area, and the optical axis of the convex microlens unit located in the periphery area is deflected to converge at the geometric center of the lens. S5. The structural data of the convex microlens unit is fused with the data of the lens substrate to generate lens processing data.
[0018] The above design method can be used to obtain personalized progressive multifocal lenses with multi-point defocusing and converging, which can meet the refractive status and visual needs of different wearers.
[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. Significantly improved visual comfort. This invention achieves a smooth transition in defocus amount when viewing objects at far, medium, and near distances through the organic combination of progressive multifocal design and zoned convergent defocus structure. There are no jumps or breaks, and the wearer experiences a natural and comfortable visual experience when switching between different visual scenarios. This greatly reduces visual fatigue and the adaptation period, and solves the problem of uneven changes in defocus amount and light intensity when switching between far and near distances in some existing lenses, resulting in wearing discomfort.
[0020] 2. Stronger and more stable defocus signal for near vision. This invention sets up microlens units with higher density and stronger refractive power around the near vision zone, and the optical axes of these microlenses converge and deflect to the optical center of the near vision zone. This allows for the generation of a continuous, stable, and sufficiently strong myopic defocus signal when viewing near objects with reduced eye accommodation. This design solves the defects of existing defocus lenses, such as large fluctuations in defocus amount and poor myopic defocus effect when viewing near objects.
[0021] 3. High spatial accuracy of defocus signal. This invention utilizes a "zonal convergence" optical axis deflection design, causing microlenses in the distance, near, and peripheral zones to converge towards their corresponding optical centers. This ensures that defocused light from different areas is precisely projected onto a predetermined curved surface in front of the retina. Compared to traditional parallel optical axis multi-point defocus lenses, this invention offers a more uniform spatial distribution of defocus signals and more precise placement, enabling more efficient use of peripheral defocus to suppress axial elongation.
[0022] 4. Wide range of applications, combining prevention and control. This invention is not only suitable for myopia control in adolescents who are already nearsighted, but can also be fitted for myopia prevention in non-nearsighted children and adolescents with insufficient or no hyperopic reserve. By adjusting the refractive power of the distance and near vision zones and the defocus parameters of the microlens, it can provide suitable myopia intervention solutions for wearers with different refractive states without affecting normal vision.
[0023] 5. High feasibility of the process and easy to mass-produce. The microlens unit of the present invention can be processed using mature processes such as nanoimprinting or injection molding, and the microlens can be located on the front and / or rear surface of the lens. The progressive channel can also be selected to be located on different surfaces according to design needs, providing sufficient flexibility for manufacturing and facilitating large-scale production and quality control. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the structure of the progressive multifocal multi-point defocusing and converging lens of the present invention, with the convex surface of the left lens facing upwards and the concave surface facing downwards; Figure 2 This is a schematic diagram of the structure of the progressive multifocal multi-point defocusing and converging lens of the present invention, with the right lens having the convex surface facing upwards and the concave surface facing downwards; Figure 3 This is a flowchart of the progressive multifocal multi-point defocusing and converging lens design method in Embodiment 3 of the present invention.
[0025] In the diagram: 1. Lens matrix; 2. Distance vision zone; 3. Near vision zone; 4. Progressive channel. Detailed Implementation
[0026] The device will now be described in further detail with reference to the accompanying drawings. In the drawings, the same reference numerals consistently denote the same elements. Those skilled in the art will understand that the following embodiments are merely illustrative of the technical solution of this device and are not intended to limit it in any way. Example 1
[0027] According to the appendix Figure 1 and attached Figure 2 As shown, the lens includes a transparent lens substrate 1 made of optical resin or glass, the lens substrate 1 having a precisely calculated optical surface to form multiple functional areas.
[0028] The upper part of the lens substrate 1 is the distance vision zone 2, and the center of this zone is the photopic vision zone. It is designed according to the wearer's distance refractive power to provide clear distance vision.
[0029] The lower part of the lens matrix 1 is the near vision zone 3, and the center of this zone is the photopic vision zone. It is designed according to the wearer's near refractive power. The near photopic vision zone provides additional light under the ADD according to the light power of the distance photopic vision zone. The value of ADD ranges from +1.50D to +2.50D.
[0030] The vertical channel connecting the distance vision zone 2 and the near vision zone 3 is a progressive channel 4, whose refractive power continuously changes from distance vision refractive power to near vision refractive power. The channel length ranges from 9mm to 18mm, and the channel width ranges from 4mm to 6mm.
[0031] The aforementioned distance vision zone 2, near vision zone 3, and progressive channel 4 together constitute the basic structure of a progressive multifocal lens. Wearers can obtain clear vision at far, intermediate, and near distances through this structure, while reducing the accommodative load on the eyes when looking at near objects.
[0032] Multiple convex microlens units are provided on the surface of the lens substrate 1. These convex microlens units are distributed in areas outside the bright vision zones of the far vision zone 2, the progressive channel 4, and the near vision zone 3.
[0033] The “clear vision zone” refers to the central area of each light zone used to provide clear central vision. No microlens structures are placed in this area to ensure that light passes through without interference.
[0034] The central area of the far-field beam 2 is the bright-view area, with a diameter of 8 mm, and there are no microlenses distributed in this area. The area surrounding the bright-view area of the far-field beam 2 is distributed with convex microlens units. These convex microlens units are arranged in concentric rings along the radial direction, and the radial distance between adjacent rings is 1.0 mm to 3.0 mm.
[0035] The central area of the near-field illumination zone 3 is the bright-view zone, with a diameter of 7 mm, and no microlenses are distributed within this area. The area surrounding the bright-view zone of the near-field illumination zone 3 contains convex microlens units arranged in concentric rings radially, and their density is higher than or equal to that of the outer area of the far-field illumination zone 2. Specifically, the number density of convex microlens units in the outer area of the near-field illumination zone 3 is 1.0 to 1.5 times that of the outer area of the far-field illumination zone 2.
[0036] The areas on both sides of the progressive channel 4 are equipped with convex microlens units, which are arranged in a fan-shaped ring pattern. The outermost area of the lens is the peripheral area, in which convex microlens units are distributed, arranged in concentric rings along the radial direction. Through the above layout, three relatively independent microlens distribution areas are formed on the lens: the distance viewing area, the near viewing area, and the peripheral area.
[0037] In this embodiment, the convex microlens unit is a hemispherical protrusion structure with a diameter ranging from 0.5 mm to 1.5 mm. The center-to-center distance between adjacent convex microlens units ranges from 1.0 mm to 3.0 mm. Each region is provided with an additional vertex power of the convex microlens unit, thereby generating a myopic defocus signal on the human retina.
[0038] As a core feature of this device, the optical axis of the convex microlens unit is not entirely parallel to the optical axis of the lens substrate 1, but rather deflected towards the corresponding optical center depending on the region it is located in. Specifically: The convex microlens units located on the temporal and nasal sides of the lens, i.e. the convex microlens units located in the peripheral area, have their optical axes deflected towards the geometric center of the lens. The convex microlens unit located on the periphery of the bright vision area of the far-field light zone 2 has its optical axis deflected in the direction of the optical center of the far-field light zone 2. The convex microlens unit located on the periphery of the near-light zone 3 has its optical axis deflected towards the optical center of the near-light zone 3.
[0039] As a further core feature of this device, the optical axis deflection state of the convex microlens unit is precisely designed, and the deflection angle α of the optical axis of the convex microlens unit relative to the normal of the lens substrate 1 satisfies: Furthermore, the deflection angle α increases with the distance between the convex microlens unit and the optical center corresponding to its region. Specifically, for the convex microlens unit located on the periphery of the bright vision area of the far-field light region 2, the deflection angle α of its optical axis relative to the optical axis of the bright vision area of the far-field light region 2 satisfies: 0° < α ≤ 20°; The convex microlens unit located on the periphery of the near-light zone 3 has its optical axis deflected by an angle α relative to the optical axis of the near-light zone 3, satisfying the following: 0° < α ≤ 20°.
[0040] In both the far-field and near-field light-use zones, the convex microlens unit that is further away from the bright field of view has a larger deflection angle.
[0041] In this embodiment, the additional vertex power of the convex microlens unit adopts the following exemplary parameters: The additional top focal power D1 of a single convex microlens unit on the periphery of the far-field optical zone 2 is +2.00D to +5.00D; The additional top power D2 of a single convex microlens unit on the periphery of the near-field region 3 is +4.00D to +7.50D, and D2>D1, D2-D1=+2.00D±0.50D.
[0042] The total additional vertex power D11 generated by the convergence of all convex microlens units in the far-field region 2 is +1.50D to +4.00D; The total additional vertex power D22 generated by the convergence of all convex microlens units in the near-field region 3 is +3.00D to +6.50D, and D22-D11=+2.00D±0.50D.
[0043] The total additional vertex power D12 generated by all the convex microlens units in the peripheral region of the progressive channel 4 ranges from +2.00D to +5.00D, and the defocusing amount in this region gradually increases from the adjacent distant light-emitting area to the adjacent near light-emitting area, achieving a smooth transition. It should be noted that the above numerical range is only an exemplary selection of this embodiment, and can be adjusted according to the wearer's specific refractive state and visual needs in actual production.
[0044] Through the synergistic design of the above-mentioned convex microlens defocusing and partitioned converging defocusing structure, this embodiment forms three myopic defocusing arc zones that converge in front of the retina in the far-light zone, near-light zone, and peripheral zone, respectively. Example 2
[0045] This embodiment, based on Embodiment 1, adjusts the arrangement of the convex microlens units and the optical axis deflection parameters to adapt to the individualized needs of different wearers. The design scheme of this embodiment can be adopted for wearers with significant astigmatism or high corneal asymmetry.
[0046] In this embodiment, the distribution density of convex microlens units increases continuously from the far-field illumination zone 2 to the near-field illumination zone 3. Specifically, the distribution density of convex microlens units is relatively low in the periphery of the far-field illumination zone 2, moderate in the regions on both sides of the progressive channel 4, and highest in the periphery of the near-field illumination zone 3. This gradual density design allows the intensity of the defocus signal to transition smoothly with changes in the field of view, further improving wearing comfort.
[0047] Regarding optical axis deflection, this embodiment introduces a more refined partitioning design. In addition to maintaining the basic architecture of three convergence centers in Embodiment 1, this embodiment also implements a gradient deflection design for the convex microlens units on each concentric ring: on the same ring, the optical axis deflection angle of the convex microlens units is not constant, but varies slightly according to their location, in order to better match the curvature changes of the human retina in different directions.
[0048] In this embodiment, the additional vertex power D1 of a single convex microlens unit in the distance vision zone 2 is +2.00D to +4.00D, and the additional vertex power D2 of a single convex microlens unit in the near vision zone 3 is +4.00D to +6.00D, where D2-D1 = +2.00D ± 0.50D. Compared with Embodiment 1, this embodiment uses a relatively low defocus setting, making it suitable for wearers who are more sensitive to defocus signals or are still in the myopia prevention stage. The diameter of the convex microlens unit ranges from 0.8mm to 1.2mm, and the center-to-center distance between adjacent convex microlens units ranges from 1.5mm to 2.5mm.
[0049] Other structures and parameters not mentioned in this embodiment are the same as in Embodiment 1. Example 3
[0050] As attached Figure 3 As shown in the figure, this embodiment provides a design method for a progressive multifocal multi-point defocusing converging lens, which includes the following steps: S1. Based on the wearer's prescription parameters, design a lens substrate 1 to provide a basic refractive power. The lens substrate 1 includes a distance vision zone 2, a near vision zone 3, and a progressive channel 4 connecting the two. The refractive power of the distance vision zone 2 is determined according to the wearer's distance vision prescription. The refractive power of the near vision zone 3 is the sum of the distance vision refractive power and the added ADD, with the ADD value ranging from +1.50D to +2.50D. The refractive power of the progressive channel 4 continuously changes from the distance vision refractive power to the near vision refractive power along the vertical direction.
[0051] S2. On the surface of the lens substrate 1, defocus regions for distributing convex microlens units are defined. The defocus regions include: the peripheral region of the far-field region 2, the peripheral region of the near-field region 3, the regions on both sides of the progressive channel 4, and the peripheral region.
[0052] S3. Based on the curved morphology of the human retina, a model for the optical axis deflection distribution is established. This model is based on the principles of geometric optics, approximating the retina as a sphere with a specific radius of curvature. Through ray tracing calculations, the direction and angle of optical axis deflection of the required convex microlens unit at different positions within the defocus region are determined.
[0053] S4. Based on the optical axis deflection distribution model, arrange convex microlens units within the defocus region. Specifically, deflect the optical axes of the convex microlens units located on the periphery of the far-field region 2 to converge at the optical center of the far-field region 2, deflect the optical axes of the convex microlens units located on the periphery of the near-field region 3 to converge at the optical center of the near-field region 3, and deflect the optical axes of the convex microlens units located in the peripheral region to converge at the geometric center of the lens.
[0054] S5. The structural data of the convex microlens unit is fused with the data of the lens substrate 1 to generate lens processing data. The structural data of the convex microlens unit includes parameters such as its position coordinates, radius of curvature, and optical axis direction. The lens processing data can be used for CNC machining or mold manufacturing.
[0055] The above design method can be used to obtain personalized progressive multifocal lenses with multi-point defocusing and converging, which can meet the refractive status and visual needs of different wearers. Example 4
[0056] This embodiment provides eyeglasses, including a frame on which a progressive multifocal multi-point defocusing converging lens, as described in any one of embodiments 1 to 3, is mounted. These eyeglasses can be used for myopia control in adolescents and for myopia prevention in children with insufficient hyperopic reserve. Different lens design parameters can be selected based on the wearer's specific refractive state and eye habits to achieve personalized customization.
[0057] The above description is merely a preferred embodiment of this device and is not intended to limit the device. Those skilled in the art can make various improvements and modifications without departing from the spirit and principles of this device, and these improvements and modifications should also be considered within the scope of protection of this device.
Claims
1. A progressive multifocal multi-point defocusing converging lens, comprising a lens substrate (1) with refractive correction function, characterized in that, The lens substrate (1) includes: The distance vision zone located at the upper part of the lens (2); The near vision zone located at the bottom of the lens (3); A progressive channel (4) connecting the far-field optical zone (2) and the near-field optical zone (3), wherein the refractive power gradually changes in the vertical direction; and Multiple convex microlens units distributed outside the bright vision area of the far-field light zone (2), the progressive channel (4) and the near-field light zone (3); Among them, the multiple convex microlens units have additional vertex power, and the convex microlens units in each region are set with different additional vertex power, so as to form myopic defocus on the human eye retina with reduced adjustment. Furthermore, at least some of the optical axes of the convex microlens units are deflected relative to the optical axis of the lens substrate (1), and the direction of deflection is determined according to the region where the convex microlens unit is located: The convex microlens units located on the temporal and nasal sides of the lens have their optical axes deflected towards the geometric center of the lens. The convex microlens unit located outside the bright vision area of the far-field light zone (2) has its optical axis deflected in the direction of the optical center of the far-field light zone (2); The convex microlens unit located on the periphery of the near-light zone (3) has its optical axis deflected in the direction of the optical center of the near-light zone (3); This results in myopic defocus arcs converging in front of the retina in the far-field, near-field, and peripheral areas, thus producing myopic defocus.
2. The progressive multifocal multi-point defocusing converging lens according to claim 1, characterized in that, The additional top focal length of the convex microlens unit varies gradually, either continuously or discontinuously, from the far-field light region (2) to the near-field light region (3), and generally increases from the far-field light region (2) to the near-field light region (3).
3. The progressive multifocal multi-point defocusing and converging lens according to claim 2, characterized in that, In the far-field region (2), the additional top focal length D1 of a single convex microlens unit is +2.00D to +5.00D; In the near-light zone (3), the additional top power D2 of a single convex microlens unit is +4.00D to +7.50D, and D2>D1, D2-D1=+2.00D±0.50D.
4. The progressive multifocal multi-point defocusing and converging lens according to claim 1, characterized in that, The deflection angle α of the optical axis of the convex microlens unit relative to the normal of the lens substrate (1) satisfies: 0° < α ≤ 25°, and the deflection angle α increases with the increase of the distance between the convex microlens unit and the optical center corresponding to its region.
5. The progressive multifocal multi-point defocusing converging lens according to claim 4, characterized in that, The convex microlens unit located outside the bright vision area of the far-use light zone (2) has an optical axis deflection angle α relative to the optical axis of the bright vision area of the far-use light zone (2) that satisfies: 0° < α ≤ 20°; The convex microlens unit located outside the near-light zone (3) has an optical axis deflection angle α relative to the optical axis of the near-light zone (3) that satisfies: 0° < α ≤ 20°.
6. The progressive multifocal multi-point defocusing converging lens according to claim 1, characterized in that, The convex microlens units are distributed in concentric rings along the radial direction around the periphery of the far-field light-using area (2) and the near-field light-using area (3), and are distributed in fan-shaped rings on both sides of the progressive channel (4), and are distributed in concentric rings along the radial direction in the peripheral area.
7. The progressive multifocal multi-point defocusing converging lens according to claim 1, characterized in that, The diameter of the convex microlens unit is 0.5 mm to 1.5 mm, and the center-to-center distance between adjacent convex microlens units is 1.0 mm to 3.0 mm.
8. The progressive multifocal multi-point defocusing converging lens according to claim 1, characterized in that, The convex microlens unit is one or more of the following: circular, elliptical, or polygonal.
9. The progressive multifocal multi-point defocusing converging lens according to claim 1, characterized in that, The convex microlens unit is formed on the front and / or rear surface of the lens substrate (1) by nanoimprinting or injection molding, and the progressive channel (4) is located on the front or rear surface of the lens.
10. A design method for a progressive multifocal multi-point defocusing converging lens, characterized in that, Includes the following steps: S1. Based on the wearer's prescription parameters, design a lens matrix (1) that provides a basic refractive power, the lens matrix (1) including a distance vision zone (2), a near vision zone (3) and a progressive channel (4) connecting the two. S2. On the surface of the lens substrate (1), a defocus area for distributing convex microlens units is determined, the defocus area including the periphery of the far-field light area (2), the periphery of the near-field light area (3), the two sides of the progressive channel (4), and the periphery area. S3. Based on the curved morphology of the human retina, establish an optical axis deflection distribution model, and calculate the optical axis deflection direction and angle of the required convex microlens unit at different positions in the defocused area; S4. According to the optical axis deflection distribution model, convex microlens units are arranged in the defocus area, so that the optical axis of the convex microlens unit located outside the bright vision area of the far-use light area (2) converges and deflects to the optical center of the far-use light area (2), the optical axis of the convex microlens unit located outside the bright vision area of the near-use light area (3) converges and deflects to the optical center of the near-use light area (3), and the optical axis of the convex microlens unit located in the outer area converges and deflects to the geometric center of the lens. S5. The structural data of the convex microlens unit is fused with the data of the lens substrate (1) to generate lens processing data.