A preventive and control spectacle lens for delaying progression of myopia degree and axial length growth

Abstract

The utility model relates to a kind of delay myopia degree progress and axial growth prevention and control spectacle lens, belong to the field of glasses optics.The lens includes lens base, and the center area is circular center visible area, and outside is peripheral defocus area.Peripheral defocus area is composed of microlens array, and is divided into two asymmetric design regions from central axis: upper half adopts circular ring array structure, and lower half adopts concentric honeycomb array structure.Effective inhibition vision deepens, improve myopia management effect.Peripheral defocus area defocus gradually reduces from center to outside, more fit 8-18 years old teenager eyeball retina structure features.Microlens gap place evenly densely multiple diffusion points, effectively reduce contrast, brightness by soft scattered light, reduce hue difference;Reduce the high contrast signal detected by retina photoreceptor cell and its elongation signal to eye, so as to delay axial growth, delay myopia deepens.

Description

Technical Field

[0001] This utility model belongs to the field of eyeglass optics technology, specifically relating to a spectacle lens for slowing down the progression of myopia and the elongation of the axial length of the eye. Background Technology

[0002] With the continuous rise in the incidence of myopia, myopia prevention and control has become an important public health issue of global concern. Myopia not only affects vision but can also lead to a series of eye diseases, such as retinal detachment and macular degeneration. Therefore, effective myopia prevention and control methods are of great significance for protecting the visual health of adolescents.

[0003] Currently, myopia control lenses, as a non-invasive intervention, are widely used in the prevention and control of myopia. Among these, peripheral defocus technology is one of the main technical approaches for myopia control lenses. Based on animal experiments and clinical studies, this technology has found that by creating myopia defocus around the retina, it can effectively slow down axial elongation, thereby controlling the progression of myopia.

[0004] Existing myopia control lenses typically employ a design where the central area has normal refractive power and the peripheral area has increased positive refractive power. For example, CN115793280A discloses a peripheral defocus myopia control lens, which includes a central refractive correction zone, a peripheral defocus zone, and a peripheral lens area distributed sequentially from the center outwards. The peripheral defocus zone includes alternating concentric microlens defocus portions and annular defocus portions. This design can compensate for visual quality while maintaining defocus, thus extending the wearer's wearing time.

[0005] WO2024120048A1 discloses a myopia defocus lens, including an optical central area capable of focusing a light beam onto the retina, and a peripheral defocus area capable of focusing the light beam onto or in front of the retina. The peripheral defocus area is concentrically arranged with the optical central area and located radially outward from the optical central area. The lens incorporates a microlens array and a freeform surface area in the peripheral defocus area, resulting in a progressively increasing defocus amount along the radial direction. This allows the lens to provide a suitable defocus amount for different users based on the physiological characteristics of the eye.

[0006] CN116774463A discloses a myopia control optical lens, which includes a central optical zone and a peripheral myopia defocus zone. The peripheral myopia defocus zone has several levels of defocus microlens rings surrounding the central optical zone, with a gap between adjacent levels of defocus microlens rings. This alternating arrangement of multi-level defocus microlens rings and gaps reduces the defocus difference between the central optical zone and the peripheral myopia defocus zone, forming a buffer zone for vision correction and helping to improve user comfort.

[0007] CN114994946A proposes a spectacle lens with a ring-shaped distributed micro-ring curved lens array. This lens has a ring-shaped micro-ring curved lens array structure on its first optical surface. This microlens array allows the wearer's peripheral retina to receive a defocus signal that induces reverse axial elongation, thereby stimulating axial length growth and controlling the progression of myopia.

[0008] CN115616798B discloses a myopia control lens with a hybrid multifocal microlens. The peripheral defocus area of ​​the lens includes a number of microlens units arranged in an array, and each microlens unit includes a number of microlenses arranged in an array.

[0009] Each microlens unit is divided into multiple layers in a ring shape from the inside out, with the central microlens as the base point. The microlenses in each layer have equal additional light intensity, and the additional light intensity of the microlenses decreases or increases sequentially from the inner layer to the outer layer. This design makes myopia control more effective and improves wearer compliance.

[0010] However, existing myopia control lenses have several technical problems. First, most myopia control lenses use a concentric microlens array. While this design is suitable for near vision, it causes lag when observing distant objects, leading to axial elongation and further increasing myopia. Second, the traditional concentric design does not consider the differences in eye movement when viewing near and far objects, failing to provide optimal optical performance for different visual tasks. Furthermore, existing lenses significantly increase visual blur and dizziness during wear, easily causing visual fatigue and affecting user experience and compliance. Finally, the defocus zone design of existing lenses often does not fully consider the differences in the physiological characteristics of the eyes of people of different ages and degrees of myopia, making it difficult to provide personalized myopia control solutions.

[0011] Therefore, there is an urgent need to develop a new type of eyeglass lens that can provide differentiated optical performance for different visual tasks, while taking into account visual quality and myopia control effects, in order to meet the actual needs of myopia control among teenagers. Utility Model Content

[0012] To address the technical problem that existing myopia control lenses using concentric microlens arrays exhibit lag during long-distance observation, leading to increased axial length and myopia, as well as increased visual blur, dizziness, and eye strain, this paper proposes a lens that improves wearing comfort, reduces eye strain, and enhances myopia management effectiveness.

[0013] The technical solution adopted by this utility model to solve its technical problem is: a spectacle lens for delaying the progression of myopia and the elongation of the axial length, comprising a lens base, the central area of ​​which is a central visible area, which is circular, and the outer side of which is a peripheral defocus area, wherein the refractive power of the peripheral defocus area is greater than that of the central visible area, and the peripheral defocus area is composed of a plurality of microlens arrays.

[0014] Preferably, the peripheral defocus area is divided into upper and lower regions along the central axis. The microlenses in the upper and lower regions are arranged in an asymmetrical design. The microlenses in the lower region adopt a concentric honeycomb array structure, and the microlenses in the upper region adopt a circular array structure.

[0015] Furthermore, the defocusing amount in the peripheral defocusing area gradually decreases from the center area outwards.

[0016] Optionally, the diameter of the central visible area is less than or equal to 5 mm.

[0017] Preferably, multiple diffusion points are evenly distributed in the microlens gap of the peripheral defocus area.

[0018] Furthermore, the peripheral defocus area accounts for more than 78% of the area on the lens substrate.

[0019] Optionally, the circular array structure consists of several layers of non-concentric semi-circular defocusing rings, with each layer of defocusing rings being slightly off-center.

[0020] Preferably, the distance between two adjacent semicircular defocusing rings is 0.6 mm.

[0021] Preferably, the microlens arrangement density within 11mm of the inner diameter of the peripheral defocus area is less than that in areas outside 11mm, in order to increase the comfort of wearing and using the product.

[0022] The beneficial effects of this utility model are as follows:

[0023] 1. By dividing the peripheral defocus area into upper and lower regions and adopting an asymmetrical design, this utility model enables the eye to obtain different optical effects when looking at near and far objects, effectively inhibiting the progression of vision problems and improving the effectiveness of myopia management.

[0024] 2. The upper region microlenses adopt a circular array structure with high contrast, which minimizes the defocusing amount entering the eyeball and overcomes the lag phenomenon caused by existing concentric microlens arrays when observing at a distance. The lower region microlenses adopt a concentric honeycomb array structure. When looking at near objects, the eyeball rotates downward, creating a high-frequency usage space. The honeycomb array structure ensures that the defocusing point entering the eyeball remains constant, resulting in strong detail resolution, making near viewing less tiring and clearer.

[0025] 3. The design of gradually decreasing defocus from the center outward in the peripheral defocus zone better matches the retinal structure of the eyes of teenagers aged 8-18. While ensuring the defocus effect, it also helps to stabilize the eye position. At the same time, the increase in defocus is small and almost imperceptible when wearing, providing good wearing comfort.

[0026] 4. The design with a central visible area diameter of less than or equal to 5mm allows for direct stimulation of the central visible area, resulting in clearer imaging, less fatigue, easier adjustment, and a better defocus stimulation effect.

[0027] 5. The evenly distributed diffusion points in the microlens gaps of the peripheral defocus zone can effectively reduce contrast and brightness, and reduce hue differences. Combined with the defocus effect of the defocus zone, it can effectively inhibit the progression of vision problems and has a significant effect on delaying vision deterioration.

[0028] 6. The area of ​​the peripheral defocus zone accounts for more than 78%, which increases the defocus area and can steadily improve the myopia management effect. Compared with existing technologies, it has a more comprehensive prevention and control effect.

[0029] 7. The circular array structure consists of several layers of non-concentric semi-circular defocus rings. The slightly off-center design of each layer of defocus rings creates multiple defocus stimuli, which improves the sustainability of myopia management and effectively reduces visual fatigue. Attached Figure Description

[0030] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0031] Figure 1 This is a schematic diagram of the structure of the protective eyeglass lens in this utility model. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] Example 1

[0034] A type of spectacle lens that slows the progression of myopia and the elongation of the eye axis, see [link / reference]. Figure 1 It includes a lens base 1, with a central visible area 2 at the center of the lens base 1. The central visible area 2 is circular and has a diameter of less than or equal to 5mm. Direct stimulation of the central visible area 2 results in clearer imaging, less fatigue, easier adjustment, and better defocus stimulation.

[0035] The peripheral defocus zone 3 is located outside the central visible area 2. The refractive power of the peripheral defocus zone 3 is greater than that of the central visible area 2. The peripheral defocus zone 3 is composed of several microlens arrays. The peripheral defocus zone 3 is divided into upper and lower regions along the central axis. The microlenses in the upper and lower regions are arranged in an asymmetrical design. The upper region uses a circular array structure 302, while the lower region uses a concentric honeycomb array structure 301. When viewing near objects, the eye rotates downwards, a high-frequency usage area that is more prone to eye fatigue. Therefore, the lower region uses a honeycomb array structure 301. This honeycomb array structure ensures that the defocus point entering the eye remains constant, resulting in strong detail resolution and making near viewing less tiring and clearer. When viewing distant objects, the eye rotates upwards, and the eye pressure itself is not high. Therefore, the upper region uses a circular array structure 302. This design minimizes the amount of defocus entering the eye, resulting in a lower microlens density.

[0036] The defocus amount in the peripheral defocus zone 3 gradually decreases from the center outwards, better matching the spherical structure of the retina in the eyes of teenagers aged 8-18. While ensuring defocus effect, it also stabilizes eye position, and the increase in defocus power is small, almost imperceptible to the eyes during wear, providing good wearing comfort. This method is suitable for teenagers aged 8-18 with different degrees of myopia: low myopia (below 200°), moderate myopia (200-400°), and high myopia (400-600°). The range of defocus amount varies accordingly, and in one feasible method, a stepped setting is used for low, medium, and high defocus powers.

[0037] In the peripheral defocus zone, multiple diffusion points are evenly distributed in the gaps between the three microlenses. Through this point diffusion area, soft scattered light effectively reduces contrast and brightness, and decreases hue differences. It also reduces the high-contrast signals detected by retinal photoreceptor cells and the elongation signals emitted to the eye, thereby slowing down axial elongation and myopia progression. (Further explanation: The fact that colorblind patients are less prone to myopia and experience slower myopia progression may be related to weakened signals from retinal photoreceptor cells.)

[0038] The peripheral defocus area 3 accounts for more than 78% of the area on the lens substrate 1. The study shows that the surface defocus area is directly proportional to the myopia control effect. Effectively increasing the defocus area can steadily improve the myopia management effect.

[0039] The circular array structure 302 consists of several layers of non-concentric semi-circular defocus rings. Each layer of defocus rings is slightly off-center, giving the lens an asymmetrical shape and creating multiple defocus stimuli to improve the sustainability of myopia management. The spacing between two adjacent semi-circular defocus rings is 0.6mm. This spacing design ensures a uniform distribution of the defocus effect while maintaining visual comfort.

[0040] This asymmetrical myopia control lens, through its different microlens structures in the upper and lower regions, fully considers the physiological characteristics of the human eye under different visual tasks, providing a targeted optical correction solution that better conforms to the laws of eye movement. The honeycomb array structure 301 in the upper part is suitable for the upward rotation of the eyeball when farsighted, while the circular array structure 302 in the lower part is more suitable for the downward rotation of the eyeball when nearsighted, thus achieving a comprehensive myopia control effect.

[0041] The density of microlenses within the inner diameter of 11mm in the peripheral defocus area is lower than that in areas outside the inner diameter of 11mm, in order to increase the comfort of wearing and using the product.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application, and this application is not limited to the above embodiments. It is understood that other improvements and variations directly derived or conceived by those skilled in the art without departing from the spirit and concept of this application should be considered to be included within the protection scope of this application.

Claims

1. A spectacle lens for slowing the progression of myopia and the elongation of the axial length, characterized in that, The lens includes a lens base (1), the central area of ​​which is a central visible area (2), which is circular, and the outer side of the central visible area (2) is a peripheral defocus area (3). The refractive power of the peripheral defocus area (3) is greater than that of the central visible area (2). The peripheral defocus area (3) is composed of several microlens arrays. The peripheral defocus area (3) is divided into upper and lower regions from the central axis. The microlenses in the upper and lower regions are arranged in an asymmetrical design. The microlenses in the upper region adopt a circular array structure (302), and the microlenses in the lower region adopt a concentric honeycomb array structure (301).

2. The spectacle lens for delaying the progression of myopia and axial elongation according to claim 1, characterized in that, The defocusing amount of the peripheral defocusing area (3) gradually decreases from the center area outwards.

3. The spectacle lens for delaying the progression of myopia and axial elongation according to claim 1, characterized in that, The diameter of the central visible area (2) is less than or equal to 5 mm.

4. The spectacle lens for delaying the progression of myopia and axial elongation according to claim 1, characterized in that, In the microlens gap of the peripheral defocus area (3), multiple diffusion points are evenly distributed.

5. The spectacle lens for delaying the progression of myopia and axial elongation according to claim 1, characterized in that, The peripheral defocus area (3) accounts for more than 78% of the area on the lens substrate (1).

6. The spectacle lens for delaying the progression of myopia and axial elongation according to claim 1, characterized in that, The circular array structure (302) consists of several layers of non-concentric semi-circular defocusing rings, with each layer of defocusing rings being slightly off-center.

7. A spectacle lens for delaying the progression of myopia and axial elongation according to claim 6, characterized in that, The distance between two adjacent semicircular defocusing rings is 0.6 mm.

8. The spectacle lens for delaying the progression of myopia and axial elongation according to claim 1, characterized in that, The microlens arrangement density within the inner diameter of the defocused area (3) is less than that in the area outside the inner diameter of 11mm.

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