Multi-focus out-of-focus lens for promoting growth of ocular axis and glasses thereof

Abstract

The invention relates to the technical field of out-of-focus lenses, in particular to a multi-focus out-of-focus lens for promoting eye axis growth, and the multi-focus out-of-focus lens comprises a central clear vision area and a peripheral positive out-of-focus area surrounding the central clear vision area; the central area adopts a convex lens design, and a plurality of out-of-focus micro lenses are distributed in the peripheral positive out-of-focus area; the defocusing amounts of the defocusing micro lenses in the peripheral positive defocusing area are consistent or are gradually increased from the central clear vision area to the peripheral direction; the out-of-focus micro lenses in the peripheral positive out-of-focus area are evenly distributed, or the distribution numbers of the out-of-focus micro lenses on the upper side and the lower side of the peripheral positive out-of-focus area are different.

Description

Technical Field

[0001] The present invention relates to the technical field of defocus lenses, and in particular to a multifocal defocus lens that promotes eye axis growth. Background Art

[0002] In the existing technology, the correction of hyperopia mainly relies on traditional single-vision lenses. For hyperopic patients, the traditional single-vision lens correction method mainly focuses on improving central vision, while ignoring the natural regulatory mechanism of axial growth. For children with hyperopia, it is difficult to use traditional single-vision lenses to cure hyperopia, anisometropia and amblyopia caused by axial hypoplasia. With the change of modern lifestyle, children's eye health problems are increasingly concerned. Although the existing technology proposes to promote axial growth through defocus lenses; the physiological hyperopia of preschool children will gradually decrease with age, and the vision will gradually develop and improve. However, the axial growth of children with higher hyperopia is slow, resulting in the inability to improve the degree of hyperopia. The existing defocus lenses do not take into account the particularity of preschool children's eye development and eye habits.

[0003] Therefore, when using defocus lenses, it is necessary to fully consider the eye development characteristics and eye needs of children, and thus the present invention is proposed. Summary of the invention

[0004] In order to solve the problem that traditional single-vision lenses cannot promote the development of the eye axis in hyperopic children, the present invention provides a multifocal through-focus lens that promotes the growth of the eye axis.

[0005] In order to solve the above technical problems, the present invention provides a multifocal defocus lens that promotes eye axis growth, wherein the multifocal defocus lens comprises a central clear vision area and a peripheral positive defocus area surrounding the central clear vision area; the central area adopts a convex lens design, and a plurality of defocus microlenses are distributed in the peripheral positive defocus area; the defocus amount of the defocus microlenses in the peripheral positive defocus area is consistent or gradually increases from the central clear vision area to the surrounding directions; the defocus microlenses in the peripheral positive defocus area are evenly distributed or the number of defocus microlenses distributed on the upper and lower sides of the peripheral positive defocus area is different.

[0006] In an embodiment of the present invention, the defocused microlenses in the peripheral positive defocused area are evenly distributed in the shape of concentric circles, and the difference in defocus amounts of the defocused microlenses on two adjacent concentric circles ranges from 0.05D to 1.00D.

[0007] In an embodiment of the present invention, the diameter of the defocused microlens is 0.6 mm, the distance between two adjacent concentric circles is equal, and the distance between two adjacent defocused microlenses is 0.6 mm.

[0008] In an embodiment of the present invention, the diameter of the defocused microlens is 0.6 mm, the spacing of the concentric circles increases from the inside to the outside, the spacing between the two adjacent concentric circles in the innermost layer is Y mm, and the spacing between the two adjacent concentric circles in each outer layer increases from (Y*1.005) mm to (Y*1.1) mm.

[0009] In an embodiment of the present invention, the diameter of the multifocal defocus lens is in the range of 70-80 mm, and the diameter of the central clear vision area is in the range of 8-15 mm.

[0010] In an embodiment of the present invention, the peripheral positive defocus area adopts a multi-focal point-shaped defocus microlens design, the point-shaped defocus microlenses are distributed in a matrix, and the outer layers of adjacent multi-focal point-shaped defocus microlenses are 1.1 to 1.3 times the number of inner layers;

[0011] The refractive range of the central clear vision area is +4.0D to +16.0D, and the defocus amount of the point-shaped defocus microlens is -1.5D to -4.0D.

[0012] In an embodiment of the present invention, the peripheral positive defocus area adopts an annular defocus design, the refractive range of the central clear vision area is +3.0D to +12.0D, and the defocus amount of the annular defocus is -2.0D to -4.0D.

[0013] In an embodiment of the present invention, the two sides of the multifocal defocus lens adopt point-shaped defocus microlens distribution and annular defocus distribution respectively; or the upper and lower sides of the peripheral positive defocus area adopt annular defocus distribution and point-shaped defocus microlens distribution respectively.

[0014] In an embodiment of the present invention, the multifocal defocus lens is made of resin material or PC material.

[0015] In an embodiment of the present invention, the glasses include a frame, at least two groups of single vision lenses arranged in pairs, and the multifocal defocused lenses described above, wherein frames are symmetrically arranged on the left and right sides of the frame, and the multifocal defocused lenses are installed in the two frames;

[0016] The refractive power of each group of single vision lenses is different. The frame is provided with a slot around the frame, and the single vision lenses are provided with buckles. The single vision lenses are connected to the frame through the buckles and the slots.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By setting the central clear vision area as a convex lens, setting multiple defocus micro-lenses in the peripheral positive defocus area, and gradually changing the defocus amount of the defocus micro-lenses to the surrounding areas, the position of the central clear vision area can be made to correspond to the pupil position of the child hyperopic patient in the horizontal state, and the vision correction effect can be obtained under the action of the convex lens. When the child hyperopic patient's peripheral vision looks in the four directions of up, down, left and right, the peripheral vision of the eye is made to correspond to the position of the peripheral positive defocus area, and different vision correction effects are produced at different positions of the peripheral positive defocus area, so as to stimulate the visual nerve of the child hyperopic patient and achieve the purpose of promoting the growth of the eye axis, thereby avoiding the problem of poor development of the child's eye axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0020] Figure 1 is a schematic plan view of a multifocal defocused lens provided by an embodiment of the present invention;

[0021] Figure 2 is a schematic plan view of a multifocal defocused lens provided by another embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the distribution of defocus microlenses in the multifocal defocus lens provided by an embodiment of the present invention;

[0023] Figure 4 is a quadrant distribution diagram of a multifocal through-focus lens provided by an embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the three-dimensional structure of the glasses provided by an embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of the exploded structure of the glasses provided by an embodiment of the present invention;

[0026] Figure 7 is a schematic diagram of a partial cross-sectional structure of the glasses provided by an embodiment of the present invention;

[0027] Figure 8 is a schematic diagram of a partial cross-sectional exploded structure of the glasses provided by an embodiment of the present invention;

[0028] Description of Reference Numerals

[0029] 1. multifocal defocused lens; 2. glasses; 11. central clear vision area; 12. peripheral positive defocused area; 121. defocused microlens; 21. frame; 22. frame; 23. single vision lens; 221. slot; 222. first lens slot; 223. second lens slot; 231. connecting frame; 232. buckle; 2211. baffle; 2212. spring. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0031] See also Figure 1-Figure 3 In order to solve the problems in the prior art, the present invention provides a multifocal defocus lens 1 for promoting the growth of the eye axis. The multifocal defocus lens 1 includes a central clear vision area 11 and a peripheral positive defocus area 12. The central area adopts a convex lens design, and a plurality of defocus microlenses 121 are distributed in the peripheral positive defocus area 12. The defocus amount of the defocus microlenses 121 gradually increases from the central clear vision area 11 to the surrounding areas.

[0032] By setting the central clear vision area 11 of the multifocal defocused lens 1 as a convex lens, so that the position of the central clear vision area 11 corresponds to the pupil position of a child hyperopic patient in a horizontal state, the child hyperopic patient can obtain vision correction under the action of the convex lens, and by setting a plurality of defocus microlenses 121 in the peripheral positive defocus area 12, and making the defocus of the defocus microlenses 121 gradually change from the central clear vision area 11 to the surrounding areas, when the child hyperopic patient's peripheral vision looks in the four directions of up, down, left and right respectively, the peripheral vision of the eye corresponds to the position of the peripheral positive defocus area 12. Since the defocus amount of the peripheral positive defocus area 12 gradually changes in the surrounding directions, the child hyperopic patient can use the peripheral vision to look at different positions around to produce different vision correction effects, thereby stimulating the visual nerve of the child hyperopic patient and achieving the purpose of promoting the growth of the eye axis, thereby avoiding the problem of poor development of the child's eye axis.

[0033] See also Figure 2In one example, the hyperopia of a child hyperopic patient is +5.0D. When the multifocal defocus lens 1 of the present invention is used, a convex lens with a central clear vision area 11 of +5.0D is selected to correct the vision of the child hyperopic patient. The peripheral positive defocus area 12 includes a defocus area A, a defocus area B and a defocus area C from the inside to the outside. The defocus amount of the defocus microlens 121 in the defocus area A is -2.D, the defocus amount of the defocus microlens 121 in the defocus area B is -3.D, and the defocus amount of the defocus microlens 121 in the defocus area C is -4.D. Therefore, the refractive power in the defocus area A is +3.0D (i.e., +5.0D+(-2.D)), and the defocus amount of the defocus microlens 121 in the defocus area B is -3.D. The defocus amount is +2.D (i.e., +5.0D+(-3.D)), and the defocus amount of the defocus microlens 121 in the defocus area C is +1.0D (i.e., +5.0D+(-4.D)). Therefore, when a child with hyperopia looks straight ahead in a level state, the child can obtain vision correction and see external objects clearly under the action of the +5.0D convex lens. When the child with hyperopia uses peripheral vision to look in the four directions of up, down, left and right, different refractive degrees of vision correction effects can be obtained in the defocus area A, defocus area B and defocus area C respectively. Therefore, under the action of the multifocal defocus lens 1, the visual nerve of the child with hyperopia is stimulated to promote the growth of the eye axis and avoid the problem of axial hypoplasia in children.

[0034] In the above example, due to the optical properties of the eyeball and the refractive state of the eye, children with hyperopia need to be able to see the object directly in front of them at all times, but do not need to see the upper, lower, left, and right parts of the object directly in front of them clearly. Specifically, the farther the position is from the upper, lower, left, and right parts of the object directly in front of them, the less it needs to be seen clearly. Therefore, it is only necessary to keep the refractive power of the central clear vision area 11 consistent with the hyperopia power of the child with hyperopia, so that the child with hyperopia can see the object directly in front of them through the central clear vision area 11. When the child with hyperopia uses peripheral vision to look at objects directly above, below, left, and right through the peripheral positive defocus area 12, different degrees of vision correction effects can be obtained under the action of the defocus microlenses 121 with different defocus amounts. Specifically, the closer the upper, lower, left, and right parts are to the object directly in front of them, the better the correction effect obtained, and the farther the upper, lower, left, and right parts are from the object directly in front of them, the worse the correction effect obtained. This can stimulate the visual nerves of children with hyperopia, promote the growth of the eye axis, and avoid the problem of axial hypoplasia in children.

[0035] In the above embodiment, the defocus microlenses 121 in the peripheral positive defocus area 12 can be uniformly distributed or non-uniformly distributed. When the defocus microlenses 121 are uniformly distributed, a relatively stable defocus stimulation can be ensured no matter how the child hyperopic patient rotates the eyeball, thereby continuously intervening in the growth of the eyeball and better promoting the growth of the eye axis. At the same time, the uniformly distributed microlenses 121 can also cause the light to be uniformly refracted and scattered when passing through the lens, reduce the irregular refraction and scattering of light, and improve the clarity and contrast of the imaging.

[0036] When the defocus microlenses 121 are distributed non-uniformly, children with hyperopia can obtain different degrees of defocus stimulation at different positions in the peripheral positive defocus area 12 when they rotate their eyeballs to different positions, so as to form dynamic visual stimulation, which is more likely to promote the growth of the eye axis and avoid the problem of poor development of the eye axis in children. Preferably, the defocus microlenses 121 on the upper and lower sides of the peripheral positive defocus area 12 are distributed in different numbers, so that when children with hyperopia rotate their eyeballs, they can see distant objects through the upper defocus microlenses 121, and after rotating their eyeballs, they can see nearby objects through the lower defocus microlenses 121, and obtain different degrees of defocus stimulation when looking at distant objects and nearby objects, thereby promoting the growth of the eye axis.

[0037] In other embodiments of the present invention, the defocus amount of the defocus microlenses 121 in the peripheral positive defocus area 12 is consistent, so that children with hyperopia can obtain the same defocus stimulation when turning their eyes to look at different positions, thereby improving the clarity and contrast of the image.

[0038] See also Figure 4 In other embodiments of the present invention, the defocus lens is divided into four quadrants, wherein the first quadrant is IOH, the second quadrant is HOD, the third quadrant is DOG, and the fourth quadrant is GOI. The defocus amounts of the peripheral positive defocus areas 12 in the four quadrants are different, so that the defocus stimulation received by children with hyperopia when observing objects in different directions is different, which effectively exercises the visual muscle nerves and promotes the growth of the eye axis.

[0039] In one example, the defocused microlenses 121 are arranged in concentric rings, and the spacing between the defocused microlenses 121 is X mm. In the three rings farthest from the central clear area, in the first and fourth quadrants, the spacing between the defocused microlenses is (X*0.994) mm to (X*0.9) mm, so as to ensure that children with hyperopia have better vision when they are hyperopic.

[0040] In other embodiments, the vertex focal lengths of the point-shaped defocused microlenses 121 distributed in the four quadrants are consistent, so that the vertex focal lengths in different quadrants remain consistent. Therefore, the point-shaped defocused microlenses 121 refract light to the same degree in all directions. When children with hyperopia observe objects in different directions, their visual experience is relatively stable, and there will be no large visual differences due to changes in direction, which helps to reduce visual fatigue and makes it easier for the eyes to adapt to lens correction.

[0041] In other embodiments, the point-shaped defocused microlenses 121 distributed in four quadrants present a defocus form with a gradually increasing vertex power from the central clear area 11 to the periphery of the lens to simulate the visual needs of the eyes in a natural state. The gradually increasing vertex power from the central clear area 11 to the periphery can guide the eyes to use the peripheral retina more in a natural state, thereby stimulating the development of the peripheral area of ​​the retina and promoting the growth of the eye axis. This is of positive significance for the visual development of children with hyperopia, and it also helps to improve the visual clarity and adjustment ability of the eyes in different fields of view, so that the eyes can get appropriate defocus stimulation when looking at objects at different distances and directions, thereby improving the visual quality and helping children with hyperopia better adapt to different visual scenes, such as reading, looking at the blackboard, exercising, etc.

[0042] In another embodiment of the present invention, the defocused microlenses in the peripheral positive defocus area 12 are evenly distributed in the shape of concentric circles, and the difference in the defocus amounts of the defocused microlenses 121 on two adjacent concentric circles ranges from 0.05D to 1.00D, so that the defocused microlenses 121 in the peripheral positive defocus area 12 can provide a more refined and uniform visual correction effect for children with hyperopia, reduce the adjustment pressure of the eyes, reduce visual fatigue, and promote the growth of the eye axis.

[0043] See also Figure 3 In an embodiment of the present invention, the diameter of the defocus microlens 121 is 0.6 mm, and the distance between two adjacent defocus microlenses 121 is 0.6 mm, wherein the defocus microlenses 121 are arrayed along the peripheral positive defocus area 12, so that when a child with hyperopia looks at an object directly in front of him, the peripheral light of the eye can pass through the peripheral positive defocus area 12, and a better vision correction effect is obtained at a position closer to the object directly in front of him, and a worse vision correction effect is obtained at a position closer to the object directly in front of him, thereby stimulating the visual nerve of the child with hyperopia under the action of the multifocal defocus lens 1, promoting the growth of the eye axis, and avoiding the problem of axial dysplasia in children.

[0044] In another embodiment of the present invention, the diameter of the defocused microlens 121 is 0.6 mm, the spacing between the concentric circles increases from the inside to the outside, the spacing between the two adjacent concentric circles in the innermost layer is Y mm, and the spacing between the two adjacent concentric circles in each outer layer increases from (Y*1.005) mm to (Y*1.1) mm, so that the lens can adjust the focus of light more accurately, and provide a smoother visual transition and a more natural visual effect for children with hyperopia when worn, thereby enhancing the ability of children with hyperopia to adapt to different vision conditions.

[0045] See also Figure 1 In an embodiment of the present invention, the diameter range of the multifocal through-focus lens 1 is 70-80 mm, and the diameter range of the central clear vision area is 8-15 mm, wherein EF is the diameter of the central clear vision area, and GH is the diameter of the multifocal through-focus lens 1.

[0046] In an embodiment of the present invention, the peripheral positive defocus area 12 adopts a multifocal point defocus microlens design, the point defocus microlenses are distributed in a matrix, and the outer layer of adjacent multifocal point defocus microlenses is 1.1 to 1.3 times the number of inner layers, wherein the refractive range of the central clear vision area 11 is +4.0D to +16.0D, and the defocus amount of the point defocus microlenses is -1.5D to -4.0D, so that children with different hyperopia degrees can choose a multifocal defocus lens 1 with a corresponding refractive degree, and obtain different degrees of vision correction effect under the action of the multifocal point defocus microlenses in the peripheral positive defocus area 12, thereby stimulating the visual nerves of children with hyperopia and promoting the growth of the eye axis.

[0047] In an embodiment of the present invention, the peripheral positive defocus area 12 adopts an annular defocus design, the refractive range of the central clear vision area 11 is +3.0D to +12.0D, and the defocus amount of the annular defocus is -2.0D to -4.0D, so that children with different hyperopia degrees can choose the multifocal defocus lens 1 of the corresponding refractive degree, and obtain different degrees of vision correction effect under the action of the annular defocus in the peripheral positive defocus area 12, thereby stimulating the visual nerves of children with hyperopia and promoting the growth of the eye axis.

[0048] See also Figure 3 As shown in Table 1, in the above embodiment, the point-shaped defocus microlenses in the peripheral positive defocus area 12 are arranged in multiple rings in the form of concentric circles, each ring is provided with multiple point-shaped defocus microlenses, and the refractive powers of the multiple point-shaped defocus microlenses in each ring are the same.

[0049]

[0050]

[0051] Table 1

[0052] In an embodiment of the present invention, the peripheral positive defocus area 12 is designed with a regionalized defocus microlens 121, and the regionalized defocus microlenses 121 are distributed in at least two preset positions of the peripheral positive defocus area 12, and the defocus amounts of the regionalized defocus microlenses 121 at at least two preset positions are the same or different, so that children with different degrees of hyperopia can choose a multifocal defocus lens 1 with a corresponding refractive power, and obtain different degrees of vision correction effect under the action of the regionalized defocus microlenses 121 in the peripheral positive defocus area 12, thereby stimulating the visual nerves of children with hyperopia and promoting the growth of the eye axis.

[0053] In the above embodiment, the specific position of the regionalized defocused microlens 121 is customized according to the eye habits of children with hyperopia. For example, when reading and writing, children with hyperopia need to turn their eyes to look down at the book. Therefore, the position of the regionalized defocused microlens 121 can be set below the central clear vision area 11, so that the eyes of children with hyperopia can look at the book through the regionalized defocused microlens 121, and at the same time, different degrees of vision correction effect can be obtained under the action of the regionalized defocused microlens 121. When looking at the blackboard in class, children with hyperopia need to turn their eyes to look up at the blackboard. Therefore, the position of the regionalized defocused microlens 121 can be set above the central clear vision area 11, so that the eyes of children with hyperopia can look at the blackboard through the regionalized defocused microlens 121, and at the same time, different degrees of vision correction effect can be obtained under the action of the regionalized defocused microlens 121.

[0054] In an embodiment of the present invention, the two sides of the multifocal defocus lens respectively adopt a point-shaped defocus microlens distribution and annular defocus distribution. The point-shaped defocus microlenses are distributed on one side of the multifocal defocus lens, and the annular defocus is distributed on the other side of the multifocal defocus lens, so as to provide a more comfortable and natural vision correction effect for children with hyperopia. At the same time, when the eyes switch between different visual areas, they can obtain a more uniform light distribution and focal length adjustment, thereby reducing eye fatigue.

[0055] In other embodiments of the present invention, annular defocus distribution and point-shaped defocus microlens distribution are respectively adopted on the upper and lower sides of the peripheral positive defocus area, so that when children with hyperopia concentrate their attention on looking at books at a close distance, the point-shaped defocus microlenses can provide them with precise vision correction, so that children with hyperopia can see the books clearly; when children with hyperopia look at distant objects, the annular defocus provides them with continuous focal length changes, so that children with hyperopia can maintain clear visual effects within a wide field of view.

[0056] In the embodiment of the present invention, the multifocal defocused lens 1 is made of resin material or PC material.

[0057] In an embodiment of the present invention, the defocus microlens 121 is located on the front and / or back side of the multifocal defocus lens 1, wherein the front side is the side of the multifocal defocus lens 1 close to the eyes of the child hyperopic patient, and the back side is the side of the multifocal defocus lens 1 away from the eyes of the child hyperopic patient, so as to provide different degrees of vision correction effect for the child hyperopic patient under the action of the defocus microlens 121 and promote the development of the eye axis.

[0058] See also Figure 5-Figure 6 In order to solve the problems in the prior art, the present invention also provides a pair of glasses 2 for promoting the growth of the eye axis. The glasses 2 include a frame 21 and the multifocal defocused lens 1 mentioned above. Frames 22 are symmetrically arranged on the left and right sides of the frame 21, and the multifocal defocused lens 1 is installed in the two frames 22.

[0059] By installing the multifocal defocused lens 1 in two frames 22, after a child with hyperopia wears the glasses of the present invention, the child can see the object directly in front of him through the central clear vision area 11, so as to achieve the vision correction effect for the child with hyperopia. When the child with hyperopia looks at the object directly in front of him, the peripheral vision of the eye can be used to see the upper, lower, left and right positions directly in front of him through the peripheral positive defocused area 12, and under the action of the peripheral positive defocused area 12, the child with hyperopia can achieve different degrees of vision correction effect, thereby stimulating the development of the child's eye axis and preventing the child's eye axis from being poorly developed.

[0060] See also Figure 7-Figure 8 In an embodiment of the present invention, the glasses 2 further include at least two groups of single vision lenses 23 arranged in pairs, each group of single vision lenses 23 has a different diopter, a slot 221 is provided on the frame 21 around the frame 22, and a buckle 232 is provided on the single vision lens 23, and the single vision lens 23 is connected to the frame 22 through the buckle 232 and the slot 221.

[0061] By providing a buckle 232 on the single-vision lens 23 and a slot 221 on the frame 22, when the vision of a child hyperopic patient recovers to different degrees, a single-vision lens 23 with a corresponding refractive power can be provided according to the degree of recovery of the eye, and then the single-vision lens 23 can be snapped onto the frame 22, so that the child hyperopic patient can correct his vision under the joint action of the multifocal defocus lens 1 and the single-vision lens 23, thereby gradually reducing the degree of the multifocal defocus lens 1 according to the recovery of the child hyperopic patient, which is helpful for the axial development of the child hyperopic patient and promotes the vision recovery of the child hyperopic patient.

[0062] In one example, the hyperopia of a child hyperopic patient is restored from +8.0D to +6.0D, that is, the child hyperopic patient's vision is restored by -2.0D. At this time, the child hyperopic patient can configure the refractive power of the single-vision lens 23 to -2.0D, and snap the single-vision lens 23 onto the frame 22, so as to correct the child's vision under the action of the multifocal defocus lens 1 and the single-vision lens 23, thereby promoting the recovery of the child's vision.

[0063] In the above embodiment, a first lens groove 222 and a second lens groove 223 are provided on the frame 22, wherein the multifocal defocused lens 1 is snapped into the first lens groove 222 to fix the multifocal defocused lens 1 under the action of the first lens groove 222, and the single-vision lens 23 is snapped into the second lens groove 223, and a detachable effect is achieved by snapping the buckle 232 and the slot 221, so that when the vision of the child hyperopic patient is restored, the single-vision lens 23 can be taken out from the second lens groove 223, and the single-vision lens 23 with the corresponding refractive power can be replaced and snapped into the second lens groove 223 to promote the vision recovery of the child hyperopic patient.

[0064] In the above embodiment, a connecting frame 231 is provided around the single-vision lens 23, and buckles 232 are fixed around the connecting frame 231. The positions of the buckles 232 around the frame 22 are all provided with slots 221, so that when the single-vision lens 23 is installed on the frame 22, the buckles 232 around the buckles 232 and the slots 221 around the buckles 232 can be engaged with each other to enhance the connection stability between the single-vision lens 23 and the frame 22 and prevent the single-vision lens 23 from falling off.

[0065] In the above embodiment, a baffle 2211 and a spring 2212 are provided in the card slot 221, wherein the baffle 2211 is slidably connected to the card slot 221, and the spring 2212 is located in the card slot 221, and one end of the spring 2212 abuts against the bottom of the baffle 2211, and the other end abuts against the bottom of the card slot 221, so that the baffle 2211 is pressed against the connection frame 231 under the action of the spring 2212, and the baffle 2211 abuts against the buckle 232 to prevent the buckle 232 from being separated from the card slot 221. When the single-vision lens 23 needs to be replaced, the baffle 2211 is pressed to slide downward to move the baffle 2211 away from the buckle 232, so that the buckle 232 can slide out of the card slot 221, and then the single-vision lens 23 can be taken out from the frame 22, so that the single-vision lens 23 can be replaced conveniently.

[0066] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

[0068] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A multifocal defocus lens for promoting eye axis growth, characterized in that: The multifocal defocus lens comprises a central clear vision area and a peripheral positive defocus area surrounding the central clear vision area; The central area adopts a convex lens design, and a plurality of defocus micro lenses are distributed in the peripheral positive defocus area; The defocus amount of the defocus microlenses in the peripheral positive defocus area is consistent or gradually increases from the central clear vision area to the surrounding areas; The defocus microlenses in the peripheral positive defocus area are evenly distributed, or the numbers of the defocus microlenses on the upper and lower sides of the peripheral positive defocus area are different.

2. The multifocal defocus lens for promoting eye axis growth according to claim 1, characterized in that: The defocused microlenses in the peripheral positive defocused area are uniformly distributed in the shape of concentric circles, and the difference in defocus amounts of the defocused microlenses on two adjacent concentric circles ranges from 0.05D to 1.00D.

3. The multifocal defocus lens for promoting eye axis growth according to claim 2, characterized in that: The diameter of the defocused microlens is 0.6 mm, the spacing between two adjacent concentric circles is equal, and the spacing between two adjacent defocused microlenses is 0.6 mm.

4. The multifocal defocus lens for promoting eye axis growth according to claim 2, characterized in that: The diameter of the defocused microlens is 0.6 mm, the spacing between the concentric circles increases from the inside to the outside, the spacing between the two adjacent concentric circles in the innermost layer is Y mm, and the spacing between the two adjacent concentric circles in each outer layer increases from (Y*1.005) mm to (Y*1.1) mm.

5. The multifocal defocus lens for promoting eye axis growth according to claim 1, characterized in that: The diameter of the multifocal defocused lens is in the range of 70-80 mm, and the diameter of the central clear vision area is in the range of 8-15 mm.

6. The multifocal defocus lens for promoting eye axis growth according to claim 1, characterized in that: The peripheral positive defocus area adopts a multi-focal point-shaped defocus microlens design, the point-shaped defocus microlenses are distributed in a matrix, and the outer layers of adjacent multi-focal point-shaped defocus microlenses are 1.1 to 1.3 times the number of inner layers; The refractive range of the central clear vision area is +4.0D to +16.0D, and the defocus amount of the point-shaped defocus microlens is -1.5D to -4.0D.

7. The multifocal defocus lens for promoting eye axis growth according to claim 1, characterized in that: The peripheral positive defocus area adopts an annular defocus design, the refractive range of the central clear vision area is +3.0D to +12.0D, and the defocus amount of the annular defocus is -2.0D to -4.0D.

8. The multifocal defocus lens for promoting eye axis growth according to claim 1, characterized in that: The two sides of the multifocal defocus lens adopt point-shaped defocus microlens distribution and annular defocus distribution respectively; or the upper and lower sides of the peripheral positive defocus area adopt annular defocus distribution and point-shaped defocus microlens distribution respectively.

9. The multifocal defocus lens for promoting eye axis growth according to claim 1, characterized in that: The multifocal defocus lens is made of resin or PC.

10. A pair of glasses for promoting eye axis growth, characterized in that: The glasses include a frame, at least two groups of single vision lenses arranged in pairs, and the multifocal defocused lenses according to any one of claims 1 to 9, wherein frames are symmetrically arranged on the left and right sides of the frame, and the multifocal defocused lenses are installed in the two frames; The refractive power of each group of single-vision lenses is different. The frames around the frame are provided with card slots, and the single-vision lenses are provided with buckles. The single-vision lenses are connected to the frame through the buckles and the card slots.

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