Myopia prevention and control three-control glasses

Abstract

The utility model relates to optical glasses technical field especially myopia prevention and control three control glasses, including glasses frame, the inner chamber of glasses frame left and right sides all installs lens body, the lens body includes basic correction layer, the front side of basic correction layer is pasted with composite prevention and control layer, the front side of composite prevention and control layer is pasted with BI prism layer, composite prevention and control layer includes multi -point defocus sub -layer and point diffusion sub -layer, multi -point defocus sub -layer is the main part of composite prevention and control layer, and multi -point defocus sub -layer adopts hexagonal close -packed microlens array. The utility model discloses a "multi -point defocus", "point diffusion" and "BI prism" three kinds of optical technology integration in single glasses, can realize basic correction not to lose, prevention and control function not to conflict, visual function regulation accurate in the same glasses, and all layers are realized through moulding integral forming, avoid the optical deviation of multilayer pasting, and the structural stability is superior to "multi -lens splicing", and the adaptability is better.

Description

Technical Field

[0001] This utility model relates to the field of optical eyewear technology, specifically to a three-control eyewear for myopia prevention. Background Technology

[0002] Optical glasses are optical devices that use transparent lenses to change the path of light refraction in order to correct vision (such as myopia, hyperopia, and astigmatism) or protect the eyes. They also have protective and decorative functions. Currently, myopia among teenagers worldwide is becoming increasingly serious, and how to effectively slow down the progression of myopia has become a research hotspot.

[0003] A search revealed that the announcement number is CN221485737U, entitled "A Myopia Control Lens and Glasses," which includes a central correction zone and a peripheral control zone. The peripheral control zone comprises multiple concentric or eccentrically distributed partitions. Although this invention introduces positive and negative spherical aberrations in the peripheral control zone, causing uneven convergence of light received by the peripheral retina and disordered imaging signals, thus ensuring similar size of the imaging spots in front and behind the peripheral retina and uniform aberrations, thereby interfering with the growth signal of the human eye axis and achieving a better myopia control effect, it still has the following drawbacks to a certain extent.

[0004] For example, the aforementioned myopia control glasses mainly focus on the single dimension of "defocus" control. Numerous studies have shown that the occurrence and development of myopia are also closely related to visual function problems such as "accommodative lag" and "convergence excess". Accommodative lag will cause the image focus to fall behind the retina (hyperopic defocus), which will also stimulate the growth of the axial length of the eye. Convergence excess and accommodative spasm caused by prolonged close-range use of the eyes are important causes of eye fatigue and myopia progression. In order to solve the above technical problems, we have designed a myopia control glasses with three controls. Utility Model Content

[0005] The purpose of this invention is to provide a three-control myopia control glasses that can simultaneously achieve refractive correction, multi-point defocus control, and relief of accommodative lag and convergence fatigue. It has the advantages of comprehensive control, wide applicability, integrated design, and fast visual adaptation. It solves the problem of single control, inability to achieve three-control at the same time, resulting in poor wearing comfort and poor applicability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a myopia control three-control glasses, including a frame, with lens bodies installed in the inner cavities on both the left and right sides of the frame, the lens body including a basic correction layer, a composite control layer attached to the front side of the basic correction layer, a BI prism layer attached to the front side of the composite control layer, and the composite control layer including a multi-point defocus sub-layer and a dot diffusion sub-layer.

[0007] Preferably, the multi-point defocusing sublayer is the main body of the composite control layer, and the multi-point defocusing sublayer adopts a hexagonal closely arranged microlens array.

[0008] Preferably, the dot diffuser sublayer is embedded in the microlens gap of the multi-point defocus sublayer, and the dot diffuser sublayer adopts a micro-diffraction grating structure.

[0009] Preferably, the central area of ​​the basic corrective layer is the refractive correction area, and the temples are hinged to both the left and right sides of the rear side of the frame.

[0010] Preferably, a blue light protection layer is attached to the outer surface of the lens body, and a dark light adaptation layer is attached to the outer surface of the blue light protection layer.

[0011] Preferably, the blue light protection layer uses cerium oxide nanoparticles as a selective absorber, and the dark light adaptation layer uses rare earth ion activated transparent luminescent material.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model integrates three optical technologies, namely "multi-point defocusing", "point diffusion" and "BI prism", into a single lens. It can achieve basic correction without loss, control function without interference and visual function adjustment with precision in the same lens. Moreover, all layers are formed by molding in one piece, avoiding optical deviations caused by multi-layer bonding. The structural stability is better than "multi-lens splicing" and the adaptability is better.

[0014] 2. This utility model embeds a point diffusion sublayer (micro-diffraction structure) in the gap of the multi-point defocus sublayer (microlens array), which not only ensures the main function of the defocus microlens, but also achieves adjustment and relief through the diffusion structure. Moreover, the optical parameters of the two are matched (the diffusion range does not exceed the defocus range of the microlens), thus avoiding functional cancellation. Attached Figure Description

[0015] Figure 1 This is an axonometric view of the structure of this utility model;

[0016] Figure 2 This is an exploded view of the lens body of this utility model;

[0017] Figure 3 This is a front view of the lens body of this utility model;

[0018] Figure 4 This is an exploded view of a partial structure of this utility model.

[0019] In the image: 1. Frame; 2. Lens body; 3. Temple; 4. BI prism layer; 5. Composite protection layer; 6. Basic correction layer; 7. Refractive correction zone; 8. Dot diffusion sub-layer; 9. Multi-point defocus sub-layer; 10. Low light adaptation layer; 11. Blue light protection layer. Detailed Implementation

[0020] Please see Figures 1-4 A three-control myopia control glasses includes a frame 1. Lens bodies 2 are installed in the inner cavities on both sides of the frame 1. The lens body 2 includes a basic correction layer 6, which is the base optical layer of the lens and covers the entire lens area. A composite control layer 5 is attached to the front side of the basic correction layer 6. The composite control layer 5 is completely attached to the basic correction layer 6 and only covers the "near vision + peripheral vision" area of ​​the lens. A BI prism layer 4 is attached to the front side of the composite control layer 5. The BI prism layer 4 is only composited in the lower half of the near vision area of ​​the lens and has a gradient prism power structure. The prism power at the center of the lower half of the near vision area of ​​the lens is 3△, which gradually decreases to 0△ towards the edge of the lens. It conformally attaches to the basic correction layer 6 and the composite control layer 5. The composite control layer 5 includes a multi-point defocus sub-layer 9 and a dot diffusion sub-layer 8.

[0021] Please see Figure 3 The multi-point defocus sub-layer 9 is the main body of the composite control layer 5. The multi-point defocus sub-layer 9 adopts a hexagonal closely arranged microlens array with a microlens diameter of 0.3-0.5mm and a refractive power of +1.50D to +3.00D, which is customized according to the axial length of the eye to ensure that the peripheral light forms a stable myopic defocus.

[0022] Please see Figure 3 The dot diffuser layer 8 is embedded in the microlens gap of the multi-point defocus layer 9. The dot diffuser layer 8 adopts a micro-diffraction grating structure (grating period 0.5-1μm, diffraction efficiency 30%-40%), which diffuses part of the light into a field of view of ±0.5°, without affecting the sharpness and reducing the contrast.

[0023] Please see Figure 3 The central area of ​​the basic correction layer 6 is the refractive correction zone 7, which can realize the refractive correction of the optical center area. The diameter of the central area is 8-12mm, which is adapted to the pupil size and is a customized refractive power (-0.50D to -10.00D). The refractive power of the peripheral transition zone (from the edge of the central area to the edge of the lens) is smoothly transitioned to avoid visual abrupt changes. The temples 3 are hinged on both the left and right sides of the back of the frame 1.

[0024] Please see Figure 4 A blue light protection layer 11 is attached to the outer surface of the lens body 2, and a dark light adaptation layer 10 is attached to the outer surface of the blue light protection layer 11.

[0025] Please see Figure 4The blue light protection layer 11 uses cerium oxide nanoparticles as selective absorption material, which only absorbs harmful blue light in the 400-450nm range (absorption rate 30%-40%), without affecting other wavelengths of light. It also works in conjunction with the dot diffusion function. When viewing electronic screens, dot diffusion reduces contrast, and blue light protection reduces light damage, providing a dual protection adjustment system. The dark light adaptation layer 10 uses rare earth ion activated transparent luminescent material. When reading in low light at night (light intensity < 500 lux), it automatically emits a weak green light (wavelength 550nm, which does not stimulate rod cells), while reducing the dot diffusion diffraction efficiency to 20%, effectively avoiding eye fatigue caused by low contrast in low light.

[0026] When in use, the basic corrective layer 6 provides a clear reference for the lens body 2, ensuring clear imaging of the central field of vision and avoiding the diffusion and defocus effects of the composite control layer 5 from affecting core vision. Whether looking at near or far, the central line of sight can obtain clear vision through the refractive correction zone 7. The dot diffusion sub-layer 8 and multi-point defocus sub-layer 9 on the composite control layer 5 can play a synchronous role of "defocus + diffusion". Defocus inhibits axial elongation, and diffusion relieves accommodative tension. The two work synchronously in the peripheral field of vision, avoiding the accommodative lag from canceling out the defocus effect. In this way, both a defocus signal for myopia prevention and control and accommodation relief are generated. The BI prism layer 4 only activates convergence relief in near-vision scenarios such as reading and writing, matching the near-use zone coverage of the composite control layer 5 to form a precise dual accommodation of "accommodation + convergence". This allows the eyes to see near objects clearly without excessive inward turning, greatly reducing the burden on the convergence system.

[0027] In summary, this myopia control triple-control glasses, through the combined use of the BI prism layer 4, composite control layer 5, basic correction layer 6, refractive correction zone 7, dot diffusion sub-layer 8, and multi-point defocus sub-layer 9, solves the problem of single-point control, which cannot simultaneously achieve triple control, resulting in poor wearing comfort and limited applicability.

Claims

1. A three-control myopia control glasses, comprising a frame (1), characterized in that: The inner cavities on both sides of the frame (1) are fitted with lens bodies (2). The lens body (2) includes a basic correction layer (6). A composite control layer (5) is attached to the front side of the basic correction layer (6). A BI prism layer (4) is attached to the front side of the composite control layer (5). The composite control layer (5) includes a multi-point defocus sub-layer (9) and a dot diffusion sub-layer (8).

2. The myopia control glasses according to claim 1, characterized in that: The multi-point defocus sublayer (9) is the main body of the composite control layer (5), and the multi-point defocus sublayer (9) adopts a hexagonal closely arranged microlens array.

3. The myopia control glasses according to claim 1, characterized in that: The dot diffuser layer (8) is embedded in the microlens gap of the multi-point defocus layer (9), and the dot diffuser layer (8) adopts a micro-diffraction grating structure.

4. The myopia control glasses according to claim 1, characterized in that: The central area of ​​the basic correction layer (6) is the refractive correction area (7), and the left and right sides of the back of the frame (1) are hinged with temples (3).

5. The myopia control glasses according to claim 1, characterized in that: The outer surface of the lens body (2) is covered with a blue light protection layer (11), and the outer surface of the blue light protection layer (11) is covered with a dark light adaptation layer (10).

6. The myopia control glasses according to claim 5, characterized in that: The blue light protection layer (11) is made of cerium oxide nanoparticle selective absorption material, and the dark light adaptation layer (10) is made of rare earth ion activated transparent light-emitting material.

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