A multi-point defocus lens with a gradient defocus amount and a hollow honeycomb distribution.

Abstract

This invention discloses a multi-point defocus lens with a gradually increasing defocus amount and a hollow honeycomb distribution. It includes a base lens and functional areas covering the base lens. The functional areas include a central blank area, a microlens group area, and a peripheral area. The microlens group area has several microlens units closely arranged, each microlens unit including a blank area and multiple microlenses, which are arranged sequentially and tightly around the blank area. The microlens group area is divided into a stable activation area, a gradually increasing expansion area, and a high defocus enhancement area. The absolute value of the additional defocus amount in the three areas increases from the center of the lens outwards, forming a gradually increasing defocus distribution. The microstructure of this invention adopts a hollow honeycomb pattern to balance the blank area and the defocus area. While providing sufficient defocus stimulation, the hollow and blank design avoids excessive defocus stimulation, and clear imaging is still possible through the blank areas. Simultaneously, the gradually increasing defocus distribution effectively corrects hyperopic defocus in the fundus.

Description

Technical Field

[0001] This utility model relates to a multi-point defocus lens, and more particularly to a multi-point defocus lens with a gradually increasing defocus amount and a hollow honeycomb distribution. Background Technology

[0002] Microlens lenses are currently the mainstream lens for myopia management. They are mainly based on the principle of microlenses correcting hyperopic defocus of the retina. For example, Hoya Neo-Learning uses microlenses arranged in a ring with gaps between them, and the defocus is fixed without gradient changes. All microlenses have a fixed defocus of +3.50D. Essilor's Star Control microlenses are arranged in a concentric circle with an asymmetrical gradient. The spacing between the rings gradually increases from the center to the periphery, and the defocus increases gradually from the inner circle to the outer circle, ranging from +3.50D to +5.50D. However, after the lens is framed and cut, the actual effective defocus is difficult to reach +5.50D. Zeiss Little Circle (H version) uses 31 ring-shaped microcylinders arranged in a continuous ring without gaps. The spacing between the rings is only 0.5mm, the cylinder power is 9.2D, and the equivalent spherical defocus is +4.6D. Currently, the distribution patterns of microlenses in defocused lenses on the market are basically of two types. One type is where each microlens is distributed at intervals and is not connected to each other, and microlenses at different ring positions are also not connected, leaving gaps between rings. The other type is where microlenses at the same ring position are connected to each other, leaving gaps between rings.

[0003] A larger blank area in a microlens defocusing lens generally results in higher comfort, but a smaller defocus area and less defocus stimulation, which is not beneficial for myopia management. However, an excessively large defocus area or excessively strong local defocus can significantly reduce the comfort of the wearer and is also detrimental to myopia management. Balancing the blank area and defocus area is the primary task in current microlens defocusing lens design. Furthermore, a fixed defocus amount and an excessively large defocus amount do not conform to the distribution of defocus signals in the human eye. This is because the defocus signal in retinal imaging is small at the center of the retina (macula), and the defocus shift increases further away from the center. Designing the defocus distribution based on this characteristic is a task that current defocusing lens design must address. Therefore, designing a lens that balances the blank area and defocus area and forms a lens that conforms to the characteristics of retinal defocus signal distribution is an urgent problem to be solved. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to propose a multi-point defocus lens with a gradually increasing defocus amount and a hollow honeycomb distribution, so as to balance the blank area and the defocus area and provide sufficient defocus stimulation in a comfortable environment.

[0005] Technical solution: This utility model includes a base lens and a functional area covering the base lens. The functional area includes a central blank area, a microlens group area, and a peripheral area. The microlens group area has several microlens units arranged closely together. Each microlens unit includes a blank area and multiple microlenses. The multiple microlenses are arranged in close sequence around the blank area. The microlens group area is divided into a stable activation area, a gradually increasing expansion area, and a high defocus enhancement area. The absolute value of the additional defocus amount in the three areas increases from the center of the lens outwards, forming a gradual defocus distribution.

[0006] The stable activation region provides a low amount of defocus stimulation, and the absolute value of the additional defocus amount of the microlens in the stable activation region ranges from 2.8 to 3.5D.

[0007] The gradually expanding region provides moderate defocus stimulation, and the absolute value of the additional defocus amount of the microlens in the expanding region ranges from 3.5 to 4.0D.

[0008] The high defocus enhancement zone provides high defocus stimulation, and the absolute value of the additional defocus amount of the microlens in the high defocus enhancement zone ranges from 4.0 to 4.5D.

[0009] The microlens units in the microlens group are distributed sequentially towards the edge of the lens, starting from the boundary between the stable activation region and the central blank region. The stable activation region, counting from the center of the lens, has no more than 10 rings; the gradually increasing expansion region, counting from its boundary with the stable activation region, has no more than 10 rings; and the high defocus enhancement region, counting from its boundary with the gradually increasing expansion region, has no more than 10 rings.

[0010] The refractive power corresponding to the central blank area, the peripheral area, and the blank area is the same as that of the base lens.

[0011] The effective diameter range of the microlenses is 0.6~2mm, and all microlenses have the same diameter.

[0012] The effective diameter range of the central blank area is 4~10mm.

[0013] The base lens has a single aspherical, double aspherical, or freeform surface shape, and its central refractive power ranges from -10D to 5D.

[0014] Beneficial effects: The microstructure of this utility model adopts a hollow honeycomb pattern to balance the blank area and the defocus area. While providing sufficient defocus stimulation, the hollow and blank design avoids excessive defocus stimulation, and clear imaging can still be achieved through the blank areas. At the same time, the gradually increasing defocus distribution effectively corrects farsighted defocus in the fundus. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the lens structure of this utility model;

[0016] Figure 2 This is a schematic diagram of retinal imaging and defocus changes at the fundus. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Example 1

[0019] like Figure 1 As shown, the multi-point defocus lens of this invention, with a progressive defocus amount and a hollow honeycomb distribution, includes a base lens and functional areas covering the base lens. The base lens has a single aspherical, double aspherical, or freeform surface shape, with a central refractive power range of -10D to 5D. The functional areas include a central blank area 1, a microlens group area, and a peripheral area 5. The effective diameter of the central blank area 1 ranges from 4 to 10 mm. The microlens group area has several microlens units 6 closely arranged. Each microlens unit 6 includes a blank area 602 and multiple microlenses 601. The multiple microlenses 601 are arranged in a tightly connected manner around the central blank area 602. The tightly connected multiple microlenses 601 provide defocus stimulation in a local area, while the blank area 602 provides clear imaging and reduces excessive defocus stimulation. The effective diameter of each microlens 601 ranges from 0.6 to 2 mm, and all microlenses 601 have the same diameter.

[0020] The microlens array uses a combination of a honeycomb structure and openwork sections. Essentially, it achieves both sufficient defocus and clear imaging through optimized spatial layout and functional division of areas. The specific principle is as follows:

[0021] The honeycomb structure is a highly efficient filling structure: it can be seamlessly spliced, covering a wider area than round or square microlenses within the same lens area; the hollow design is a precise white space strategy: the blank areas between microlenses are not randomly reserved, but designed according to the defocus area. The orderly arrangement of the honeycomb structure allows the microlenses (defocus functional area) and the blank areas (sharp imaging area) to be distributed alternately and orderly, neither compressing the blank areas due to excessive microlenses nor reducing the defocus area due to excessive white space, achieving a dynamic balance in the spatial proportion of the two.

[0022] The honeycomb design solves the problem of having a large enough defocus area, while the hollow design solves the problem of not missing blank areas. The combination of the two allows the lens to have both wide defocus coverage and sufficient clear imaging space, thereby achieving a balance between blank areas and defocus area.

[0023] The use of cutouts and blank areas helps avoid excessive defocus stimulation. The intensity of defocus stimulation depends on the density of the defocus signal: if the entire lens area is covered with high-power microlenses, the defocus signal will continuously and densely act on the periphery of the retina, which is difficult for the developing eyes of adolescents to adapt to, easily causing dizziness and visual distortion. The blank area acts as a defocus buffer: the blank area has no defocus function, and light can pass through normally (consistent with ordinary lenses), which is equivalent to inserting a non-stimulating gap in the dense defocus signal.

[0024] These blank areas disperse the distribution density of microlenses, changing the defocus signal from continuous strong stimulation to intermittent mild stimulation. The eye can gradually adapt to the defocus signal in the gaps of clear imaging, avoiding visual discomfort caused by excessive defocus coverage and intensity, lowering the adaptation threshold, and achieving the effect of avoiding excessive defocus stimulation.

[0025] The microlens array is divided into a stable activation zone 2, a gradually expanding zone 3, and a high defocus enhancement zone 4. The absolute value of the additional defocus in these three zones increases from the center of the lens outwards, forming a gradual defocus distribution that conforms to the changing pattern of defocus signals in the fundus. Figure 2 As shown. The stable activation region 2 provides low-level defocus stimulation, the gradually expanding region 3 provides medium-level defocus stimulation, and the high-defocus enhancement region 4 provides high-level defocus stimulation. The absolute value of the additional defocus amount of the microlens 601 in the stable activation region 2 ranges from 2.8 to 3.5D, the absolute value of the additional defocus amount of the microlens 601 in the gradually expanding region 3 ranges from 3.5 to 4.0D, and the absolute value of the additional defocus amount of the microlens 601 in the high-defocus enhancement region 4 ranges from 4.0 to 4.5D. The defocus amount of the microlens 601 in each region is not limited to being fixed or increasing from the center of the lens outwards.

[0026] The microlens units 6 in the microlens array begin at the boundary between the stable activation area 2 and the central blank area 1 and are distributed sequentially towards the edge of the lens. The stable activation area 2, counting from the center of the lens, has no more than 10 rings. The gradually increasing expansion area 3, counting from its boundary with the stable activation area 2, also has no more than 10 rings. The high defocus enhancement area 4, counting from its boundary with the gradually increasing expansion area 3, also has no more than 10 rings. The refractive power corresponding to the central blank area 1, the peripheral area 5, and the blank area 602 is the same as that of the base lens, and all are used to correct vision and provide clear imaging.

[0027] By gradually increasing the amount of defocus, hyperopic defocus in the fundus can be effectively corrected. The core of the gradually increasing design is to conform to the physiological characteristics of the eye and precisely match the refractive state of the peripheral retina.

[0028] The human eye's refractive system is not a uniform sphere: from the center of the retina to the periphery, the refractive power changes naturally with a gradient (stronger at the center, weaker at the periphery). Ordinary single-vision glasses only correct central vision: the central area of ​​the lens focuses light onto the center of the retina, but due to the eye's refractive properties, light from the peripheral areas focuses behind the retina, creating hyperopic defocus. This signal can mislead the eye into thinking the focal length is insufficient, thus causing the axial length to elongate and worsening myopia.

[0029] The gradually increasing defocus amount used in this invention perfectly matches the refractive gradient of the eye's periphery: the gradually increasing design perfectly matches the physiological characteristic of the retina's refractive power decreasing from the center to the edge. Microlenses at different positions around the lens correspond to different defocus amounts—the farther the periphery of the retina is from the center, the weaker the refractive power, and the greater the defocus amount of the microlenses. This precisely shifts light that was originally focused behind the retina to in front of the retina, creating myopic defocus.

[0030] Compared to a fixed defocus amount (which can only correct hyperopic defocus in a certain area), the gradually increasing design allows all locations around the retina to receive a defocus signal that matches their own refractive state, thus canceling out hyperopic defocus across the entire periphery.

[0031] A fixed defocus amount cannot match the natural refractive gradient of the eye, which may lead to insufficient defocus in some areas (not completely offsetting hyperopic defocus) or excessive defocus (overstimulation). The gradual increase design achieves point-to-point precise correction, allowing each peripheral retina to receive just the right defocus signal, which ensures both the control effect and avoids visual discomfort caused by excessive local defocus.

[0032] Example 2

[0033] This embodiment of a multi-point defocus lens with graduated defocus and a honeycomb-like perforated distribution includes a base lens and functional areas covering the base lens. The functional areas include a central blank area 1, a microlens cluster area with a honeycomb-like perforated distribution, and a peripheral area 5. The microlens cluster area is densely arranged with multiple microlens units 6. In this embodiment, the microlens unit 6 is a hexagonal microlens unit, with a central blank area 602, and six microlenses 601 tightly surrounding the blank area 602. The microlens cluster area is divided into a stable activation area 2, a gradually increasing expansion area 3, and a high defocus enhancement area 4. The base lens has a double aspherical surface shape, with a central refractive power range of -4D and a peripheral refractive power range of -3.6D. The effective diameter of the central blank area 1 is 7.5 mm. The effective diameter of the microlenses 601 is 1 mm. The additional defocus amount of the microlens 601 in the stable activation region 2 increases from +2.8 to +3.5D, the additional defocus amount of the microlens 601 in the gradual expansion region 3 increases from +3.5 to +4.0D, and the additional defocus amount of the microlens 601 in the high defocus enhancement region 4 increases from +4.0 to +4.5D. The stable activation region 2 extends from the center of the lens for 8 rings, the gradual expansion region 3 extends from the boundary with the stable activation region 2 for 8 rings, and the high defocus enhancement region 4 extends from the boundary with the gradual expansion region 3 for 9 rings.

[0034] Example 3

[0035] This embodiment of a multi-point defocus lens with progressively decreasing defocus and a honeycomb-like perforated distribution includes a base lens and functional areas covering the base lens. The functional areas include a central blank area 1, a microlens cluster area with a honeycomb-like perforated distribution, and a peripheral area 5. The microlens cluster area is densely arranged with multiple microlens units 6. In this embodiment, the microlens unit 6 is a hexagonal microlens unit, with a central blank area 602, and six microlenses 601 tightly surrounding the blank area 602. The base lens has a double aspherical surface shape, with a central refractive power range of -3D and a peripheral refractive power range of -2.75D. The effective diameter of the central blank area 1 is 7.72mm. The effective diameter of the microlenses 601 is 1mm. The additional defocus amount of the microlenses 601 in the stable activation area 2 is +3.5D, the additional defocus amount of the microlenses 601 in the gradually increasing extension area 3 is +4.0D, and the additional defocus amount of the microlenses 601 in the high defocus enhancement area 4 is +4.5D. The stable activation zone 2 extends from the center of the lens by 8 rings; the gradual expansion zone 3 extends from the boundary with the stable activation zone 2 by 8 rings; and the high defocus enhancement zone 4 extends from the boundary with the gradual expansion zone 3 by 9 rings.

Claims

1. A multi-point defocus lens with a gradually increasing defocus amount and a hollow honeycomb distribution, characterized in that, It includes a base lens and a functional area covering the base lens. The functional area includes a central blank area, a microlens group area, and a peripheral area. The microlens group area has several microlens units arranged closely together. Each microlens unit includes a blank area and multiple microlenses. The multiple microlenses are arranged in close sequence around the blank area. The microlens group area is divided into a stable activation area, a gradually increasing expansion area, and a high defocus enhancement area. The absolute value of the additional defocus amount in the three areas increases from the center of the lens outwards, forming a gradual defocus distribution.

2. The multi-point defocus lens with gradient defocus amount and hollow honeycomb distribution according to claim 1, characterized in that, The stable activation region provides a low amount of defocus stimulation, and the absolute value of the additional defocus amount of the microlens in the stable activation region ranges from 2.8 to 3.5D.

3. The multi-point defocus lens with gradient defocus amount and hollowed-out honeycomb distribution according to claim 1, characterized in that, The gradually expanding region provides moderate defocus stimulation, and the absolute value of the additional defocus amount of the microlens in the expanding region ranges from 3.5 to 4.0D.

4. The multi-point defocus lens with gradient defocus amount and hollow honeycomb distribution according to claim 1, characterized in that, The high defocus enhancement zone provides high defocus stimulation, and the absolute value of the additional defocus amount of the microlens in the high defocus enhancement zone ranges from 4.0 to 4.5D.

5. The multi-point defocus lens with gradient defocus amount and hollow honeycomb distribution according to claim 1, characterized in that, The microlens units in the microlens group are distributed sequentially towards the edge of the lens, starting from the boundary between the stable activation region and the central blank region. The stable activation region, counting from the center of the lens, has no more than 10 rings; the gradually increasing expansion region, counting from its boundary with the stable activation region, has no more than 10 rings; and the high defocus enhancement region, counting from its boundary with the gradually increasing expansion region, has no more than 10 rings.

6. The multi-point defocus lens with gradient defocus amount and hollow honeycomb distribution according to claim 1, characterized in that, The refractive power corresponding to the central blank area, the peripheral area, and the blank area is the same as that of the base lens.

7. The multi-point defocus lens with gradient defocus amount and hollowed-out honeycomb distribution according to claim 1, characterized in that, The effective diameter range of the microlenses is 0.6~2mm, and all microlenses have the same diameter.

8. The multi-point defocus lens with gradient defocus amount and hollowed-out honeycomb distribution according to claim 1, characterized in that, The effective diameter range of the central blank area is 4~10mm.

9. The multi-point defocus lens with gradient defocus amount and hollow honeycomb distribution according to claim 1, characterized in that, The base lens has a single aspherical, double aspherical, or freeform surface shape, and its central refractive power ranges from -10D to 5D.

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