Point diffusion out-of-focus contact lens

Abstract

The utility model relates to the technical field of myopia management, in particular to a point diffusion out-of-focus contact lens, which comprises a soft lens provided with a central optical zone with the diameter of 2.5 mm-3. 0mm; the multi-ring defocus area surrounds the central optical area, the diameter of the multi-ring defocus area is 3.0 mm-8. 0mm, the multi-ring defocus area comprises six concentric circle treatment areas with the same width, and each concentric circle treatment area has positive additional diopter of + 3.00 D. According to the utility model, a double myopia management mechanism is adopted, the multi-ring defocus area provides stable peripheral myopic defocus and inhibits eye axis growth, and the myopia effect is improved. The micro dot matrix area reduces the retina contrast, reduces wrong visual signal transmission and delays the myopia progress, the arranged central optics ensures clear vision, the micro dot matrix design reduces glare, improves the comfort level, can adjust the micro density, size and defocusing amount, is adaptive to different diopters and contrast sensitivity requirements, and also has clinical effectiveness; by combining optical defocus and contrast theories, the multi-focal soft lens has a better myopia control effect compared with a traditional multi-focal soft lens.

Description

Technical Field

[0001] This utility model relates to the field of myopia management technology, specifically to a dot-diffusion defocus contact lens. Background Technology

[0002] In the existing technology, the progress of multifocal soft lenses, namely multi-point myopia defocus design technology, is as follows: Multifocal myopia defocus design frame lenses have a clear monofocal optical zone in the central area, and peripheral retinal myopia defocus is generated by closely arranged microlenses in the periphery of the lens, which may slow down the progression of myopia. Traditional multifocal myopia defocus design frame lenses induce two separate defocus surfaces. New multifocal myopia defocus design frame lenses induce continuous myopia defocus bands through aspherical microlenses with refractive gradients. Peripheral defocus slows down the elongation of the eye axis, but there are problems such as decreased visual quality and reduced contrast sensitivity.

[0003] Furthermore, theoretical research on retinal contrast has shown that genetic studies have revealed abnormally increased retinal contrast signals in children with mutations in the myopia-related gene locus MYP1, potentially leading to high myopia. Various myopia management techniques have been found to reduce contrast sensitivity during use, highlighting the crucial role of retinal contrast signals in the occurrence, development, and management of myopia. Double-blind, randomized controlled clinical trials have found that wearing novel eyeglasses designed with dot diffusion technology, by reducing retinal contrast, slowed myopia refractive error progression by 74% and axial elongation by 50%. The mechanisms, design, and clinical effectiveness of multifocal soft lenses in controlling myopia have been investigated. High contrast signals may accelerate myopia progression, while traditional defocus designs have failed to achieve targeted optimization. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a dot diffusion defocus contact lens that combines multi-ring defocus (stabilizing myopia defocus) and micro dot array (reducing contrast) to provide a dual myopia management soft lens, which can effectively solve the problems mentioned in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This invention provides a dot-diffusion defocus contact lens, comprising a flexible lens, wherein the flexible lens has a central optical zone with a diameter of 2.5mm to 3.0mm; a multi-ring defocus zone surrounds the central optical zone, with a diameter of 3.0mm to 8.0mm, comprising 6 concentric treatment zones of equal width, each of the concentric treatment zones having a positive additional refractive power of +3.00D; and a micro-dot array zone distributed within the diameter range of 2.5mm to 8.0mm, consisting of multiple discrete micro-dot array units.

[0007] Furthermore, the dot matrix form of the micro dot matrix unit includes, but is not limited to, cross-shaped dot matrix, circular dot matrix, elliptical dot matrix, and other regular or irregular dot matrix.

[0008] Furthermore, the distribution density of the micro-lattice units increases from the center to the periphery, and the coverage area accounts for 30% to 70% of the surface area of ​​the micro-lattice region.

[0009] Furthermore, the diameter of the micro-lattice unit is 10–200 μm, and the center-to-center distance between adjacent micro-lattice units is 50–300 μm.

[0010] Furthermore, the width of the six concentric treatment areas is 0.5mm to 1.0mm, and the distance between adjacent concentric treatment areas is 0.2mm to 0.5mm.

[0011] Furthermore, the base arc radius of the flexible mirror is 7.0 mm to 9.0 mm, and the material is silicone hydrogel or fluorosilicone acrylate.

[0012] Furthermore, the corrected refractive power range of the central optical zone is -0.50D to -10.00D.

[0013] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0014] 1. This utility model adopts a dual myopia management mechanism, in which the multi-ring defocus zone (+3.00D concentric circle treatment zone) provides stable peripheral myopic defocus and inhibits axial elongation, while the micro-dot array zone reduces retinal contrast, reduces the transmission of erroneous visual signals, and slows down the progression of myopia.

[0015] 2. This utility model optimizes visual quality by setting a central optical zone (2.5mm~3.0mm) to ensure clear vision, and the micro-dot matrix design reduces glare and improves comfort;

[0016] 3. This utility model has strong adaptability, adjustable micro intensity and defocus amount to adapt to different refractive power and contrast sensitivity requirements, and also has clinical effectiveness. Combining optical defocus and contrast theory, it has a better myopia control effect than traditional multifocal soft lenses. Attached Figure Description

[0017] 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 these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0019] The labels in the diagram represent:

[0020] 1. Central optical area; 2. Multi-ring defocus area; 3. Micro dot matrix area; 31. Micro dot matrix unit. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0022] The present invention will be further described below with reference to the embodiments.

[0023] Example 1:

[0024] Reference Figure 1 This is the first embodiment of the present invention, which discloses a dot-diffusion defocus contact lens. Its features include a soft lens with: a central optical zone 1 with a diameter of 2.5mm to 3.0mm, providing ample area for the entrance pupil functional zone and abundant defocus signal (defocus amount +3.00D) to ensure myopia management effectiveness and correct the wearer's central refractive error; a multi-ring defocus zone 2 surrounding the central optical zone 1, with a diameter of 3.0mm to 8.0mm, containing six concentric treatment zones of equal width, ensuring myopia management effectiveness while improving visual quality; each concentric treatment zone has a positive additional refractive power of +3.00D to generate peripheral myopic defocus; and each concentric treatment zone has the same defocus amount. A micro-dot array zone 3 is distributed within a diameter range of 2.5mm to 8.0mm and is composed of multiple discrete micro-dot array units 31. The micro-dot array diffuses light, affecting photoreceptor cells to reduce visual stimulation, i.e., reducing contrast, and reducing the impact of increased myopia caused by the transmission of erroneous contrast signals (high contrast signals).

[0025] The core of micro-arrays is to redistribute light by changing the direction of incident light propagation through periodically or randomly distributed micro-units (such as microlenses, nanoparticles, and surface relief structures). This redistributes light and reduces stimulation of the visual system by affecting photoreceptor cells, thereby slowing down the progression of myopia.

[0026] Basic research on optical defocus has found that peripheral myopic defocus can inhibit axial elongation. At the same time, more and more studies have also verified the clinical efficacy of myopia control technology based on optical defocus theory. The design of multifocal soft lenses is also based on optical defocus theory. Light passes through the correction zone and focuses on the retina to form a clear focus; light passes through the treatment zone and focuses in front of the retina to form peripheral myopic defocus, thereby achieving the purpose of slowing down axial elongation. Wearing multifocal soft lenses can achieve clear distance and near vision similar to single-vision soft lenses, while preserving normal accommodation response when viewing near objects.

[0027] Currently, the two most commonly used multifocal flexible lenses in clinical practice are concentric bifocal and progressive multifocal. The central optical zone of the concentric bifocal flexible lens is the distance vision area, surrounded by several concentric treatment zones with positive additional refractive power. The central optical zone of the progressive multifocal flexible lens is the distance correction optical zone, and the treatment zones with gradually increasing near additional refractive power are located from the center to the periphery.

[0028] Example 2:

[0029] Reference Figure 1 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the dot matrix form of the micro dot matrix unit 31 includes, but is not limited to, cross dot matrix, circular dot matrix, elliptical dot matrix and other regular or irregular dot matrix, and can achieve the equivalent design of the present invention. The dot matrix interval has a radius of 1.25mm-6mm. The distribution density of the micro dot matrix unit 31 increases from the center to the outer periphery. The coverage area accounts for 20% to 70% of the surface area of ​​the micro dot matrix region 3. The diameter of the micro dot matrix unit 31 is 10 to 200μm. The center-to-center distance between adjacent micro dot matrix units 31 is 50 to 300μm.

[0030] The width of the six concentric treatment zones is 0.5mm to 1.0mm, the spacing between adjacent concentric treatment zones is 0.2mm to 0.5mm, the base curve radius of the soft lens is 7.0mm to 9.0mm, and the material is silicone hydrogel or fluorosilicone acrylate. The corrective refractive power range of the central optical zone 1 is -0.50D to -10.00D, and the optical micro-intensity of the micro-dot matrix zone 3 is adjustable to adapt to the contrast sensitivity needs of different wearers.

[0031] The remaining structure is the same as that in Example 1.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A point-diffusion defocus contact lens, characterized in that, Includes a flexible lens, wherein the flexible lens is provided with: The central optical area (1) has a diameter of 2.5 mm to 3.0 mm. A multi-ring defocus zone (2) surrounds the central optical zone (1), with a diameter of 3.0 mm to 8.0 mm, and includes 6 concentric treatment zones of equal width, each of which has a positive additional refractive power of +3.00D; The micro-lattice region (3) is distributed in the range of 2.5 mm to 8.0 mm in diameter and is composed of thousands of discrete micro-lattice units (31).

2. The point-diffusion defocus contact lens according to claim 1, characterized in that, The dot matrix form of the micro dot matrix unit (31) includes, but is not limited to, cross dot matrix, circular dot matrix, elliptical dot matrix and other regular or irregular dot matrix.

3. The point-diffusion defocus contact lens according to claim 1, characterized in that, The distribution density of the micro-lattice units (31) increases from the center to the periphery, and the coverage area accounts for 20% to 70% of the surface area of ​​the micro-lattice region (3).

4. A point-diffusion defocus contact lens according to claim 1, characterized in that, The diameter of the micro-lattice unit (31) is 10-200 μm, and the center-to-center distance between adjacent micro-lattice units (31) is 50-300 μm.

5. A point-diffusion defocus contact lens according to claim 1, characterized in that, The width of the six concentric treatment zones is 0.5mm to 1.0mm, and the distance between adjacent concentric treatment zones is 0.2mm to 0.5mm.

6. A point-diffusion defocus contact lens according to claim 1, characterized in that, The base arc radius of the flexible mirror is 7.0 mm to 9.0 mm, and the material is silicone hydrogel or fluorosilicone acrylate.

7. A point-diffusion defocus contact lens according to claim 1, characterized in that, The corrected refractive power range of the central optical zone (1) is -0.50D to -10.00D.

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