Optical out-of-focus prevention and control myopia lens

Abstract

An optical out-of-focus prevention and control myopia lens is characterized in that a central optical area and a peripheral out-of-focus area are arranged on the front surface of the lens, a first micro convex lens array is arranged in the peripheral out-of-focus area, and the first micro convex lens array comprises a plurality of micro convex lenses arranged in a honeycomb structure; a second micro convex lens array is obtained after the first micro convex lens array deflects around the optical center by a degree A, a third micro convex lens array is obtained after the first micro convex lens array deflects around the optical center by a degree B, the degree A and the degree B are not integers and are not larger than 60 degrees, and the degree B is not equal to integral multiples of the degree A. The three micro-convex lens arrays form a non-uniform micro-convex lens array combination, so that moire fringes are avoided when the three micro-convex lens arrays face an image with a uniform period, and the situations of eye fatigue, dizziness and the like of a wearer are further avoided; due to the non-uniformity, the total defocusing amount of the micro convex lenses at the dense positions is large, the total defocusing amount of the micro convex lenses at the loose positions is small, and eyestrain is further delayed.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lenses, and in particular to an optical defocus lens for preventing and controlling myopia. Background Art

[0002] Most adolescent myopia is axial myopia, which means that myopia is mainly caused by the elongation of the eye axis. However, the eyeball itself is not a perfect sphere, but an ellipsoid, and the higher the degree of myopia, the more the eyeball is ellipsoidal. Currently, one of the clinically proven effective means to control the progression of myopia is to control the growth of the eye axis through defocusing, thereby delaying the progression of myopia.

[0003] In recent years, in the field of preventing adolescent vision problems, defocused lenses with microlens arrays have gradually become the mainstream. They mainly use microarray lenses to form a weak energy image in front of the retina, stimulating the retina to make a stress response, thereby greatly reducing the chance of myopia progression. However, the uniform micro-convex lens array structure may produce moiré fringes when facing an image with the same uniform period, causing eye fatigue and dizziness in the wearer, leading to safety issues. Summary of the invention

[0004] In view of the shortcomings of the background technology, the purpose of the present invention is to provide an optical defocus lens for preventing and controlling myopia.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An optical defocus myopia prevention and control lens, wherein the front surface of the lens is provided with a central optical zone centered on an optical center, the front surface of the lens is also provided with a peripheral defocus zone concentrically arranged with the central optical zone, the peripheral defocus zone is located outside the central optical zone, and a first micro-convex lens array is provided in the peripheral defocus zone, the first micro-convex lens array includes a plurality of micro-convex lenses arranged in a honeycomb structure; the first micro-convex lens array is deflected by degree A around the optical center to obtain a second micro-convex lens array, and the first micro-convex lens array is deflected by degree B around the optical center to obtain a third micro-convex lens array, the degree A and the degree B are not integers and are both not greater than 60 degrees, and the degree B is not equal to an integer multiple of the degree A.

[0007] Furthermore, the spacing between adjacent micro-convex lenses of the first micro-convex lens array is

[0008] Furthermore, the central optical zone is a circular area with a diameter of 8 to 12 mm, or the central optical zone is a polygonal area with an inscribed circle diameter of 8 to 12 mm.

[0009] Furthermore, the diameter of the peripheral defocusing area is 40 to 50 mm.

[0010] Furthermore, the diameter of each of the micro-convex lenses is 0.8-1.2 mm.

[0011] Furthermore, the positive refractive power of each of the micro-convex lenses is the same, and the value range is +2.50D to +4.50D.

[0012] Furthermore, the convex surface of each of the micro-convex lenses faces a side away from the eyes.

[0013] Furthermore, each of the micro-convex lens arrays is stacked on the front surface in sequence, and a coating layer is provided between the micro-convex lenses that partially overlap in position after stacking; or, a coating layer is provided between each of the micro-convex lens arrays.

[0014] Furthermore, each of the micro-convex lenses adopts a Gaussian or a flat Gaussian structure.

[0015] Furthermore, the rear surface of the lens is an aspherical surface or a free-form surface.

[0016] The beneficial effects of the present invention are:

[0017] 1. An optical defocusing myopia prevention and control lens proposed by the present invention, wherein the front surface of the lens is provided with a central optical zone centered on the optical center, and the front surface of the lens is also provided with a peripheral defocusing zone concentrically arranged with the central optical zone, the peripheral defocusing zone is located outside the central optical zone, and a first micro-convex lens array is provided in the peripheral defocusing zone, the first micro-convex lens array includes a plurality of micro-convex lenses arranged in a honeycomb structure; the first micro-convex lens array is deflected by degree A around the optical center to obtain a second micro-convex lens array, and the first micro-convex lens array is deflected by degree B around the optical center to obtain a third micro-convex lens array, the degree A and the degree B are not integers and are not greater than 60 degrees, and the degree B is not equal to an integer multiple of the degree A. The three micro-convex lens arrays constitute a non-uniform micro-convex lens array combination, which avoids the occurrence of moire fringes when facing an image with a uniform period, thereby avoiding eye fatigue, dizziness, etc. for the wearer; and due to its non-uniformity, the total defocus amount of the micro-convex lenses at denser locations is larger, and the total defocus amount of the micro-convex lenses at looser locations is smaller, thereby further achieving the effect of delaying eye fatigue.

[0018] 2. The present invention proposes an optical defocus myopia prevention and control lens, in which each micro-convex lens has the same positive refractive power and a value range of +2.50D to +4.50D. By selecting positive convex lenses with smaller refractive powers for stacking, the myopia defocus amount provided by most areas of the peripheral defocus area is smaller, and the myopia defocus amount provided by only a small part of the area where the micro-lenses are stacked is larger, thereby reducing the astigmatism caused by defocusing, and achieving the prevention and control effect of astigmatism.

[0019] 3. In the optical defocus myopia prevention lens proposed by the present invention, each micro-convex lens array is stacked in sequence on the front surface, and a coating layer is provided between the micro-convex lenses that partially overlap after stacking; or a coating layer is provided between each micro-convex lens array. The provision of the coating layer has the effects of enhancing hardness and reducing reflection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 is one of the schematic diagrams of the first micro-convex lens array;

[0022] Figure 2 is a second schematic diagram of the first micro-convex lens array;

[0023] Figure 3 is a schematic diagram of a second micro-convex lens array;

[0024] Figure 4 is a schematic diagram of a third micro-convex lens array;

[0025] Figure 5 It is an overall schematic diagram;

[0026] Figure 6 for Figure 5 A magnified schematic diagram of point A;

[0027] Figure 7 is the third schematic diagram of the first micro-convex lens array;

[0028] Figure 8 This is one of the simplified cross-sectional views of the lens;

[0029] Fig. 9 This is the second simplified diagram of the cross section of the lens;

[0030] In the figure, 101, optical center; 102, central optical zone; 20, peripheral defocus zone; 201, first micro-convex lens array; 202, second micro-convex lens array; 203, third micro-convex lens array; 204, first regular hexagonal virtual grid; 205, second regular hexagonal virtual grid; 30, front surface; 40, back surface; 50, coating layer. DETAILED DESCRIPTION

[0031] Combine the following Figure 1-9 The present invention is described in detail.

[0032] An optical defocus myopia prevention and control lens, wherein the front surface 30 of the lens is provided with a central optical zone 102 centered on an optical center 101, and the front surface 30 of the lens is also provided with a peripheral defocus zone 20 concentrically arranged with the central optical zone 102, the peripheral defocus zone 20 is located outside the central optical zone 102, and a first micro-convex lens array 201 is provided in the peripheral defocus zone 20, the first micro-convex lens array 201 includes a plurality of micro-convex lenses arranged in a honeycomb structure; the first micro-convex lens array 201 is deflected by degree A around the optical center 101 to obtain a second micro-convex lens array 202, and the first micro-convex lens array 201 is deflected by degree B around the optical center 101 to obtain a third micro-convex lens array 203, the degree A and the degree B are not integers and are both not greater than 60 degrees, and the degree B is not equal to an integer multiple of the degree A.

[0033] Specifically, a lens with a corrective negative power D' is used as a substrate, such as Figure 8 As shown, the front surface 30 of the lens refers to the side surface of the lens away from the wearer's eyes, and the rear surface 40 of the lens refers to the side surface of the lens close to the wearer's eyes. The front surface 30 of the lens is provided with two areas, the central optical zone 102 and the peripheral defocus zone 20. On the substrate with the corrected refractive power D', a micro-convex lens array combination with positive refractive power D is attached. The micro-convex lens array combination includes a first micro-convex lens array 201, a second micro-convex lens array 202 and a third micro-convex lens array 203:

[0034] like Figure 1 , Figure 2 and Figure 7 As shown, the composition of the first micro-convex lens array 201 is as follows: a first regular hexagonal virtual grid 204 is set with the optical center 101 as the center (the range of the radius R of the inscribed circle of the first regular hexagon is 2.5 to 5 mm), and a number of second regular hexagonal virtual grids 205 are made outward from the first regular hexagon to form a honeycomb structure, and micro-convex lenses are set at the vertices of the first regular hexagon and each second regular hexagonal virtual grid 205 located outside the central optical zone 102. The micro-convex lens is not set in the central optical zone 102. The number of micro-convex lenses is controlled by the value of the radius R of the inscribed circle of the first regular hexagon. The smaller the R value, the more first regular hexagons and each second regular hexagonal virtual grid 205 that can be set in the peripheral defocus zone 20, and the more micro-convex lenses. The outermost micro-convex lenses of the first micro-convex lens array 201 should be located near the boundary of the peripheral defocus zone 20.

[0035] Figure 1 (with virtual grid displayed) and Figure 2 (virtual grid not shown) the radius of the inscribed circle of the first regular hexagon and the radius of the central optical zone 102 are both 5 mm; Figure 7 The radius of the inscribed circle of the first regular hexagon is 2.5 mm, and the radius of the central optical zone 102 is 5 mm.

[0036] The present invention uses the bionics principle of the compound eye structure of flies in reality and the graphene structure of the moiré supercrystal format to change the conventional micro-convex lens array arrangement structure. After the first micro-convex lens array 201 is arranged, it is rotated twice to obtain a new second micro-convex lens array 202 and a third micro-convex lens array 203, respectively, so that the three micro-convex lens arrays occupy the peripheral defocus area 20, thereby increasing the effect of peripheral myopia defocus. Through peripheral myopia defocus, the eyeball is induced to grow and the growth of the eye axis length is controlled, and finally the effect of inhibiting the development of myopia is achieved. And the angles of the two rotations are different, so that the intervals between adjacent micro-convex lenses of different micro-convex lens arrays are different. Such three micro-convex lens arrays constitute a non-uniform micro-convex lens array combination, which avoids the appearance of moiré fringes when facing an image with a uniform period, thereby avoiding eye fatigue, dizziness, etc. in the wearer.

[0037] At the same time, the two rotation angles are different, so that the micro-convex lenses in some areas of the peripheral defocus area 20 are denser, and the micro-convex lenses in some areas of the peripheral defocus area 20 are looser. The total defocus amount of the micro-convex lenses in the denser areas is larger, and the total defocus amount of the micro-convex lenses in the looser areas is smaller, thereby achieving the effect of delaying eye fatigue.

[0038] Astigmatism occurs because the imaging surface is affected by the myopic defocusing produced by the micro-convex lens, which causes the focus defocusing of the off-axis light meridian plane and the sagittal plane to be not in the same position, thus causing astigmatism in the image. However, the present invention can select positive convex lenses with smaller refractive powers for stacking, so that the myopic defocusing amount provided by most areas of the peripheral defocusing area 20 is smaller, and the myopic defocusing amount provided by only a small part of the area where the micro-lenses are stacked is larger, thereby reducing the astigmatism caused by defocusing, and then achieving the prevention and control effect of astigmatism.

[0039] Considering the non-uniformity of the micro-convex lens array combination, the degrees A and B are selected to be small and non-integer angles. Figure 2-4 As shown, Figure 2 The first micro-convex lens array 201 is deflected by 15.2 degrees around the optical center 101 to obtain Figure 3 The second micro-convex lens array 202 Figure 2 The first micro-convex lens array 201 is deflected by 22.3 degrees around the optical center 101 to obtain Figure 4 The third micro-convex lens array 203, three micro-convex lens arrays are stacked in the peripheral defocus area 20 to obtain Figure 5 The whole shown.

[0040] In this embodiment, the spacing between adjacent micro-convex lenses of the first micro-convex lens array 201 is Specifically, the range of the inscribed circle radius R of the first regular hexagon mentioned above is 2.5-5 mm. Then, according to the relationship between the inscribed circle radius of the regular hexagon and the side length of the regular hexagon, the spacing between adjacent micro-convex lenses of the first micro-convex lens array 201 is obtained as follows:

[0041]

[0042] In this embodiment, the central optical zone 102 is a circular area with a diameter of 8 to 12 mm, or the central optical zone 102 is a polygonal area with an inscribed circle diameter of 8 to 12 mm. Preferably, the central optical zone 102 is a polygonal structure with an inscribed circle diameter of 10 mm, providing clear vision for the wearer.

[0043] In this embodiment, the diameter of the peripheral defocusing area 20 is 40-50 mm. Preferably, the diameter of the peripheral defocusing area 20 is 50 mm.

[0044] In this embodiment, the diameter of each micro-convex lens is 0.8-1.2 mm. Preferably, the diameter of a single micro-convex lens is 1 mm.

[0045] In this embodiment, the positive refractive power of each micro-convex lens is the same, and the value range is +2.50D to +4.50D.

[0046] In this embodiment, Figure 8 As shown, the convex surface of each micro-convex lens faces the side away from the eye.

[0047] In this embodiment, each micro-convex lens array is stacked on the front surface 30 in sequence, and a coating layer 50 is provided between the micro-convex lenses that partially overlap in position after stacking; or, a coating layer 50 is provided between each micro-convex lens array. Specifically, due to different selections of rotation angles, it is possible that the positions of the micro-convex lenses of the three micro-convex lens arrays do not overlap with each other, so that each micro-convex lens is stacked on the front surface 30 and directly contacts the front surface 30. At this time, the three micro-convex lens arrays and the central optical zone 102 are located at the same level of the front surface 30 (there is only one central optical zone 102, and it is not understood as "one micro-convex lens array is equipped with one central optical zone 102, so there are three layers in total").

[0048] like Figure 5 As shown, it is also possible that the positions of the micro-convex lenses in some areas do not overlap with each other, and the positions of the micro-convex lenses in some areas overlap. The definition of overlap here is that the positions of two adjacent micro-convex lenses overlap as long as they partially overlap, and the positions of two adjacent micro-convex lenses do not overlap at all.

[0049] like Fig. 9As shown, a coating layer 50 is provided between the two overlapping micro-convex lenses to prevent the two micro-convex lenses from being directly connected. At this time, the partial area of ​​the micro-convex lenses in the peripheral defocus area 20 that do not overlap with each other and the central optical area 102 are located at the same level of the front surface 30, and the partial area that overlaps is the first micro-convex lens array 201 disposed on the front surface 30 of the lens, and then the partial micro-convex lenses in the second micro-convex lens array 202 and / or the third micro-convex lens array 203 that overlap with the first micro-convex lens array 201 are stacked on the corresponding micro-convex lenses of the first micro-convex lens array 201 through the coating layer 50.

[0050] Alternatively, a coating layer 50 may be provided between each micro-convex lens array, so that the outer surface of the lens, in the direction away from the eye, is the central optical zone 102 and the first micro-convex lens array 201, the coating layer 50, the second micro-convex lens array 202, the coating layer 50, and the third micro-convex lens array 203. This method is easy to process, but the resulting lens is thicker, so it is preferred that the coating layer 50 is provided between only two micro-convex lenses that overlap.

[0051] In this embodiment, each micro-convex lens adopts one of the Gaussian or flat Gaussian structures. For the micro-convex lens on the front surface 30 of the lens, most of the myopia lenses currently use spherical, elliptical, aspherical micro-convex lens structures, and there are few attempts at other structures. The micro-lens structure of this patent adopts a Gaussian or flat Gaussian structure. By changing the micro-lens structure, the position of myopia defocus on the retina is adjusted, so that the defocus signal can be stably and accurately transmitted to the peripheral retina, and the visual effect affected by the peripheral defocus interference when the user views through the central optical zone 102 is minimized.

[0052] In this embodiment, the rear surface 40 of the lens is an aspherical surface or a free-form surface. Such a setting can better control the diopter of the rear surface 40, adjust the defocus amount for the temporal and nasal parts accordingly, and greatly reduce the visual fatigue of the user.

[0053] The lens is made of polycarbonate, or PC lens, which is lighter than traditional lenses and reduces the burden on the nose bridge of teenagers. It is also impact-resistant and not easy to be damaged. It has good UV resistance and oxidation resistance, and can maintain a good degree of transparency.

[0054] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An optical defocus lens for preventing and controlling myopia, wherein the front surface of the lens is provided with a central optical zone centered on the optical center, and the front surface of the lens is further provided with a peripheral defocus zone arranged concentrically with the central optical zone, and the peripheral defocus zone is located outside the central optical zone, characterized in that: A first micro-convex lens array is provided in the peripheral defocus area, and the first micro-convex lens array includes a plurality of micro-convex lenses arranged in a honeycomb structure; the first micro-convex lens array is deflected by degree A around the optical center to obtain a second micro-convex lens array, and the first micro-convex lens array is deflected by degree B around the optical center to obtain a third micro-convex lens array, the degree A and the degree B are not integers and are not greater than 60 degrees, and the degree B is not equal to an integer multiple of the degree A.

2. The optical defocus myopia prevention and control lens according to claim 1, characterized in that: The spacing between adjacent micro-convex lenses of the first micro-convex lens array is 3. The optical defocus myopia prevention and control lens according to claim 2, characterized in that: The central optical zone is a circular area with a diameter of 8 to 12 mm, or the central optical zone is a polygonal area with an inscribed circle diameter of 8 to 12 mm.

4. The optical defocus myopia prevention and control lens according to claim 3, characterized in that: The diameter of the peripheral defocusing area is 40 to 50 mm.

5. The optical defocus myopia prevention and control lens according to claim 1, characterized in that: The diameter of each of the micro-convex lenses is 0.8-1.2 mm.

6. The optical defocus myopia prevention and control lens according to claim 1, characterized in that: The positive refractive power of each of the micro-convex lenses is the same, and the value range is +2.50D to +4.50D.

7. The optical defocus myopia prevention and control lens according to claim 1, characterized in that: The convex surface of each micro-convex lens faces the side away from the eyes.

8. The optical defocus myopia prevention and control lens according to claim 1, characterized in that: Each of the micro-convex lens arrays is stacked on the front surface in sequence, and a coating layer is provided between the micro-convex lenses that partially overlap in position after stacking; or, a coating layer is provided between each of the micro-convex lens arrays.

9. The optical defocus myopia prevention and control lens according to claim 1, characterized in that: Each of the micro-convex lenses adopts a Gaussian or flat Gaussian structure.

10. The optical defocus myopia prevention and control lens according to claim 1, characterized in that: The rear surface of the lens is an aspherical surface or a free-form surface.

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