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

Abstract

The utility model 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, which comprises a central clear vision area and a peripheral positive out-of-focus area surrounding the central clear vision area. The central clear vision 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 utility model relates to the technical field of off-focus lenses, in particular to a multi-focal off-focus lens for promoting eye axis growth. BACKGROUND

[0002] In the prior art, the correction of hyperopia mainly depends on traditional single vision lenses, for hyperopia patients, the traditional single vision lens correction method mainly focuses on improving central vision, and ignores the natural adjustment mechanism of eye axis growth, for hyperopia children patients, it is difficult to cure hyperopia, refractive disparity and amblyopia caused by eye axis dysplasia using traditional single vision lenses, with the change of modern lifestyle, children's eye health problems are increasingly concerned, the prior art proposes to promote eye axis growth by off-focus lenses, physiological hyperopia of preschool children gradually decreases with age, and vision also gradually develops and perfects, but the eye axis of children with high hyperopia degree grows slowly, causing the hyperopia degree to be unable to improve, and the prior art does not consider the particularity of eye development and eye use habits of preschool children.

[0003] Therefore, when using the off-focus lens, the eye development characteristics and eye use requirements of children need to be fully considered, and thus the utility model is proposed. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problem that the traditional single vision lens cannot promote the eye axis development of hyperopia children, the utility model provides a multi-focal off-focus lens for promoting eye axis growth.

[0005] The utility model discloses a kind of multi-focal off-focus lenses for promoting eye axis growth to solve the above technical problems, and the multi-focal off-focus lens includes central clear vision area and the peripheral positive defocus area around the central clear vision area;The central clear vision area adopts convex lens design, and a plurality of off-focus microlenses are distributed in the peripheral positive defocus area;The off-focus amount of the off-focus microlenses in the peripheral positive defocus area is consistent or gradually increases from the central clear vision area to the four directions;The off-focus microlenses in the peripheral positive defocus area are evenly distributed or the off-focus microlenses on the upper and lower sides of the peripheral positive defocus area are different in distribution quantity.

[0006] In the embodiment of the utility model, the off-focus microlenses in the peripheral positive defocus area are evenly distributed in concentric circle shape, and the difference value range of the off-focus amount of the off-focus microlenses on adjacent two concentric circles is 0.05D-1.00D.

[0007] In the embodiment of the utility model, the diameter of the off-focus microlens is 0.6mm, the spacing between adjacent two concentric circles is equal, and the spacing between adjacent two off-focus microlenses is 0.6mm.

[0008] In the embodiment of the utility model, the diameter of the defocus microlens is 0.6mm, the interval of the concentric circles increases from inside to outside, the interval between the two adjacent concentric circles in the innermost layer is Ymm, and the interval between the two adjacent concentric circles in each outer layer increases (Y*1.005) mm to (Y*1.1) mm.

[0009] In the embodiment of the utility model, the diameter of the multifocal defocus lens is 70-80mm, and the diameter of the central clear vision area is 8-15mm.

[0010] In the embodiment of the utility model, the peripheral positive defocus area adopts a multifocal point defocus microlens design, the point defocus microlens adopts a matrix distribution, and the outer layer of the adjacent multifocal point defocus microlens is 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 defocus microlens is -1.5D to -4.0D.

[0012] In the embodiment of the utility model, the peripheral positive defocus area adopts a ring defocus design, the refractive range of the central clear vision area is +3.0D to +12.0D, and the defocus amount of the ring defocus is -2.0D to -4.0D.

[0013] In the embodiment of the utility model, the two sides of the multifocal defocus lens respectively adopt point defocus microlens distribution and ring defocus distribution, or the upper and lower sides of the peripheral positive defocus area respectively adopt ring defocus distribution and point defocus microlens distribution.

[0014] In the embodiment of the utility model, the material of the multifocal defocus lens is resin or PC.

[0015] In the embodiment of the utility model, the glasses include a frame, at least two groups of single-vision lenses arranged in pairs, and the multifocal defocus lens, the left and right sides of the frame are symmetrically provided with mirror frames, and the multifocal defocus lens is installed in the two mirror frames.

[0016] The refractive powers of each group of single-vision lenses are different, the frame around the mirror frame is provided with a clamping groove, the single-vision lens is provided with a buckle, and the single-vision lens is clamped on the mirror frame through the buckle and the clamping groove.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] By setting the central clear vision area as a convex lens, setting multiple defocus microlenses in the peripheral positive defocus area, and making the defocus amount of the defocus microlenses gradually change in all directions, the position of the central clear vision area can correspond to the pupil position of the child myopia patient in the eye level state, and the vision correction effect is obtained under the action of the convex lens; when the excess light of the child myopia patient looks in the four directions of up, down, left and right, the excess light of the eye corresponds to the position of the peripheral positive defocus area, and different vision correction effects are generated at different positions of the peripheral positive defocus area, so as to stimulate the visual nerves of the child myopia patient and promote the growth of the eye axis, thereby avoiding the problem of poor development of the eye axis of the child. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings are used to provide further understanding of the embodiments of the present application, and constitute a part of the specification, and are used to explain the embodiments of the present application together with the following specific embodiments, but do not constitute a limitation to the embodiments of the present application, and in the drawings:

[0020] Figure 1 is a plane schematic view of a multifocal defocus lens provided by the embodiments of the present application;

[0021] Figure 2 is a plane schematic view of a multifocal defocus lens provided by another embodiment of the present application;

[0022] Figure 3 is a distribution schematic view of a defocus microlens in a multifocal defocus lens provided by the embodiments of the present application;

[0023] Figure 4 is a quadrant distribution view of a multifocal defocus lens provided by the embodiments of the present application;

[0024] Figure 5 is a three-dimensional structure schematic view of glasses provided by the embodiments of the present application;

[0025] Figure 6 is an exploded structure schematic view of glasses provided by the embodiments of the present application;

[0026] Figure 7 is a partial cross-sectional structure schematic view of glasses provided by the embodiments of the present application;

[0027] Figure 8 is a partial cross-sectional exploded structure schematic view of glasses provided by the embodiments of the present application;

[0028] REFERENCE SIGNS

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

[0030] The specific embodiments described herein are intended to be illustrative only and are not intended to limit the scope of the present application. Numerous variations and modifications will become apparent to those skilled in the art once the above description is available. Such variations and modifications are meant to be within the scope of the present application.

[0031] Please refer to Figures 1-3 The multifocal defocus lens 1 provided by the present application can promote the growth of the eye axis. The multifocal defocus lens 1 comprises a central clear vision area 11 and a peripheral positive defocus area 12. The central clear vision area is designed as a convex lens. The peripheral positive defocus area 12 is provided with a plurality of defocus microlenses 121. The defocus amount of the defocus microlenses 121 gradually increases from the central clear vision area 11 to the periphery.

[0032] The central clear vision area 11 of the multifocal defocus lens 1 is designed as a convex lens, so that the position of the central clear vision area 11 corresponds to the pupil position of the child hyperopia patient in the eye level state. Thus, the child hyperopia patient can obtain vision correction effect under the action of the convex lens. The peripheral positive defocus area 12 is provided with a plurality of defocus microlenses 121. The defocus amount of the defocus microlenses 121 gradually changes from the central clear vision area 11 to the periphery. Thus, when the peripheral light of the child hyperopia patient looks in the up, down, left and right directions, the peripheral light 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 peripheral direction, the vision correction effect is different when the child hyperopia patient looks in different directions by the peripheral light. Thus, the visual nerves of the child hyperopia patient are stimulated, and the growth of the eye axis is promoted. The problem of poor development of the eye axis of the child is avoided.

[0033] Please refer to Figure 2In one example, the hyperopia degree of the child hyperopia patient is +5.0D, when the child hyperopia patient uses the multifocal defocus lens 1, the convex lens sheet with +5.0D in the central clear vision area 11 is selected to correct the vision of the child hyperopia patient, the peripheral positive defocus area 12 includes the defocus area A, the defocus area B and the defocus area C from inside to 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 diopter in the defocus area A is +3.0D (i.e. +5.0D+(-2.D)), the defocus amount of the defocus microlens 121 in the defocus area B 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)), further, when the child hyperopia patient looks straight ahead, the vision can be corrected and the external object can be seen clearly under the action of the convex lens sheet with +5.0D, when the child hyperopia patient looks at the objects in the upper, lower, left and right directions by using peripheral vision, different diopter vision correction effects can be obtained at the positions of the defocus area A, the defocus area B and the defocus area C respectively, further, the visual nerves of the child hyperopia patient are stimulated under the action of the multifocal defocus lens 1 to promote the growth of the eye axis and avoid the problem of poor development of the eye axis of the child.

[0034] In the above example, due to the optical properties of the eyeball and the refractive state of the eye, the child hyperopia patient needs to be able to see the object located in the front at any time, and the objects in the upper, lower, left and right directions of the front object do not need to be seen, specifically, the farther the position from the upper, lower, left and right directions of the front object, the less the position needs to be seen, therefore, the diopter of the central clear vision area 11 needs to be consistent with the hyperopia degree of the child hyperopia patient, so that the child hyperopia patient can see the object in the front through the central clear vision area 11, when the child hyperopia patient looks at the objects in the upper, lower, left and right directions through the peripheral positive defocus area 12 by using peripheral vision, different degrees of vision correction effects can be obtained under the action of the defocus microlens 121 with different defocus amounts, specifically, the closer the position from the upper, lower, left and right directions of the front object, the better the correction effect, and the farther the position from the upper, lower, left and right directions of the front object, the worse the correction effect, so as to stimulate the visual nerves of the child hyperopia patient, promote the growth of the eye axis, and avoid the problem of poor development of the eye axis of the child.

[0035] In the above embodiment, the defocus microlenses 121 in the peripheral positive defocus area 12 can adopt uniform distribution or non-uniform distribution. When the defocus microlenses 121 adopt uniform distribution, the defocus amount stimulation can be ensured to be relatively stable no matter how the eyeball of the child hyperopia patient rotates, and the growth of the eyeball can be continuously intervened, so that the role of promoting the growth of the eye axis is better played. Meanwhile, the uniform distribution of the microlenses 121 can also make the light produce uniform refraction and scattering when passing through the lens, reduce the irregular refraction and scattering of the light, and improve the definition and contrast of the image.

[0036] When the defocus microlenses 121 adopt non-uniform distribution, the child hyperopia patient can obtain different degrees of defocus amount stimulation in different positions in the peripheral positive defocus area 12 when the eyeball rotates to different positions, so as to form dynamic visual stimulation and more easily promote the growth of the eye axis, thereby avoiding the problem of poor development of the eye axis of the child. Preferably, the number of the defocus microlenses 121 on the upper and lower sides of the peripheral positive defocus area 12 is different, so that the child hyperopia patient can see distant objects through the defocus microlenses 121 on the upper side when the eyeball rotates, and can see near objects through the defocus microlenses 121 on the lower side after the eyeball rotates, and different degrees of defocus amount stimulation are obtained when looking at the distant objects and the near objects, thereby achieving the purpose of promoting the growth of the eye axis.

[0037] In other embodiments of the present application, the defocus amount of the defocus microlenses 121 in the peripheral positive defocus area 12 is consistent, so that the child hyperopia patient can obtain the same defocus amount stimulation when the eyeball rotates to different positions, thereby improving the definition and contrast of the image.

[0038] Please refer to Figure 4 In other embodiments of the present application, 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 amount of the peripheral positive defocus area 12 in the four quadrants is different, so that the defocus stimulation received by the child hyperopia patient when observing objects in different directions is different, thereby effectively exercising the visual muscle nerves and promoting the growth of the eye axis.

[0039] In one example, the defocus microlenses 121 are arranged in concentric circular rings, the interval value of the defocus microlenses 121 is X mm, and the distance of the three rings farthest from the central clear area is (X*0.994) mm to (X*0.9) mm in the first quadrant and the fourth quadrant, so as to ensure better vision of the child hyperopia patient when performing hyperopia.

[0040] In other embodiments, the top power of the point-like defocus microlenses 121 distributed in four quadrants is consistent, so that the top power in different quadrants remains consistent, and therefore the point-like defocus microlenses 121 have the same degree of refraction of light in all directions, and the hyperopic children have a relatively stable visual experience when observing objects in different directions, and do not have a large visual difference due to the change in direction, which helps to reduce visual fatigue and makes it easier for the eyes to adapt to the correction of the lens.

[0041] In other embodiments, the point-like defocus microlenses 121 distributed in four quadrants have a defocus form with progressively increasing top power from the central clear zone 11 to the periphery of the lens, to simulate the visual needs of the eyes in the natural state. The gradually increasing top power from the central clear zone 11 to the periphery can guide the eyes to use the peripheral retina more in the natural state, thereby stimulating the development of the peripheral area of the retina and promoting the growth of the eye axis, which has a positive significance for the visual development of hyperopic children, and also helps to improve the visual clarity and accommodation ability of the eyes in different fields of view, so that the eyes can be properly defocused when observing objects at different distances and directions, improving the visual quality and helping hyperopic children better adapt to different visual scenes, such as reading, looking at the blackboard, and sports.

[0042] In another embodiment of the present application, the defocus microlenses in the peripheral positive defocus area 12 are uniformly distributed in the form of concentric circles, and the difference in defocus amount of the defocus microlenses 121 on adjacent two concentric circles is in the range of 0.05D-1.00D, so that the defocus microlenses 121 in the peripheral positive defocus area 12 provide more precise and uniform visual correction effect for hyperopic children, reduce the accommodation pressure of the eyes, reduce visual fatigue, and promote the growth of the eye axis.

[0043] Please refer to Figure 3 In an embodiment of the present application, the diameter of the defocus microlenses 121 is 0.6mm, and the distance between adjacent two defocus microlenses 121 is 0.6mm, wherein the defocus microlenses 121 are arrayed and filled along the peripheral positive defocus area 12, so that when the hyperopic children look at objects straight ahead, the excess light of the eyes can pass through the peripheral positive defocus area 12, and better visual correction effect is obtained at positions closer to the upper, lower, left and right of the object straight ahead, and poorer visual correction effect is obtained at positions farther away from the upper, lower, left and right of the object straight ahead, thereby stimulating the visual nerves of the hyperopic children under the action of the multifocal defocus lens 1, promoting the growth of the eye axis, and avoiding causing the problem of poor eye axis development in children.

[0044] In another embodiment of the utility model, the diameter of defocus microlens 121 is 0.6mm, the interval of concentric circles increases from inside to outside, the interval value between the two adjacent concentric circles in the innermost layer is Ymm, and the interval between the two adjacent concentric circles of each outer layer increases (Y*1.005) mm to (Y*1.1) mm, so that the lens can more accurately adjust the light focusing, and when the child hyperopia patient wears, it provides more smooth visual transition and more natural visual effect for the child hyperopia patient, and enhances the ability of the child hyperopia patient to adapt to different vision conditions.

[0045] Please refer to Figure 1 In the embodiment of the utility model, the diameter of multifocal defocus lens 1 is 70-80mm, and the diameter of central clear vision area is 8-15mm, wherein EF is the diameter of central clear vision area, and GH is the diameter of multifocal defocus lens 1.

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

[0047] In the embodiment of the utility model, the peripheral positive defocus area 12 adopts a ring defocus design, the refractive range of central clear vision area 11 is +3.0D~+12.0D, and the defocus amount of ring defocus is -2.0D~ -4.0D, so that children with different hyperopia degrees can select multifocal defocus lens 1 with corresponding refractive power, and obtain different degrees of vision correction effect under the action of ring defocus in peripheral positive defocus area 12, thereby stimulating the visual nerves of the child hyperopia patient and promoting the growth of the eye axis.

[0048] Please refer to Figure 3 And table 1, in the above embodiment, the point defocus microlens of peripheral positive defocus area 12 is provided with multiple rings in the form of concentric circles, a plurality of point defocus microlenses are arranged in each ring, and the refractive power of the plurality of point defocus microlenses in each ring is the same.

[0049]

[0050]

[0051] Table 1

[0052] In the embodiment of the utility model, the peripheral positive defocus area 12 adopts the design of regional defocus microlens 121, the regional defocus microlens 121 is distributed in at least two preset positions of the peripheral positive defocus area 12, and the defocus amount of the regional defocus microlens 121 in the at least two preset positions is same or different, so that children with different hyperopia degrees can select the multifocal defocus lens 1 corresponding to the refractive power, and obtain different degrees of vision correction effect under the action of the regional defocus microlens 121 in the peripheral positive defocus area 12, thereby stimulating the visual nerve of the child hyperopia patient and promoting the growth of the eye axis.

[0053] In the above embodiment, the specific position of the regional defocus microlens 121 is customized according to the eye habits of the child hyperopia patient, for example, when the child hyperopia patient reads and writes, the eyes need to be rotated to look down at the book, therefore, the position of the regional defocus microlens 121 can be set below the central clear vision area 11, so that the eyes of the child hyperopia patient can look at the book through the regional defocus microlens 121, and at the same time, different degrees of vision correction effect are obtained under the action of the regional defocus microlens 121. When the child hyperopia patient looks at the blackboard in class, the eyes need to be rotated to look up at the blackboard, therefore, the position of the regional defocus microlens 121 can be set above the central clear vision area 11, so that the eyes of the child hyperopia patient can look at the blackboard through the regional defocus microlens 121, and at the same time, different degrees of vision correction effect are obtained under the action of the regional defocus microlens 121.

[0054] In the embodiment of the utility model, the two surfaces of the multifocal defocus lens respectively adopt point-shaped defocus microlens distribution and ring-shaped defocus distribution, the point-shaped defocus microlens is distributed on one surface of the multifocal defocus lens, and the ring-shaped defocus distribution is on the other surface of the multifocal defocus lens, so as to provide more comfortable and natural vision correction effect for the child hyperopia patient, and at the same time, more uniform light distribution and focal length adjustment can be obtained when the eyes switch between different visual areas, reducing the fatigue of the eyes.

[0055] In other embodiments of the utility model, the upper and lower sides of the peripheral positive defocus area respectively adopt ring-shaped defocus distribution and point-shaped defocus microlens distribution, so that when the child hyperopia patient concentrates attention to look at the book at close range, the point-shaped defocus microlens provides accurate vision correction for the child hyperopia patient, so that the child hyperopia patient can see the book clearly, and when the child hyperopia patient looks at the distant object, the ring-shaped defocus provides continuous focal length change for the child hyperopia patient, so that the child hyperopia patient can maintain clear visual effect in a wide field of view.

[0056] In the embodiment of the utility model, the material of the multifocal defocus lens 1 adopts resin material or PC material.

[0057] In the embodiment of the utility model, the defocus microlens 121 is located on the front and / or back of the multifocal defocus lens 1, wherein the front is the side of the multifocal defocus lens 1 close to the eyes of the hyperopia children, and the back is the side of the multifocal defocus lens 1 away from the eyes of the hyperopia children, so as to bring different degrees of vision correction effect to the hyperopia children under the action of the defocus microlens 121, and promote the development of the eye axis.

[0058] Please refer to Figures 5-6 The utility model discloses to solve the prior art problem, still provide a kind of glasses 2 for promoting eye axis growth, glasses 2 include frame 21 and above-mentioned multifocal defocus lens 1, frame 21 left and right sides symmetrical arrangement has frame 22, multifocal defocus lens 1 is installed in two frame 22.

[0059] By installing multifocal defocus lens 1 in two frame 22, so that after the hyperopia children wear the eyes of the utility model, the object in front can be seen clearly through central clear vision area 11, to reach the vision correction effect of the hyperopia children, when the hyperopia children watch the object in front, the light of eye can be watched in front of up and down and left and right position through peripheral positive defocus area 12, and different degrees of vision correction effect is brought to the hyperopia children under the action of peripheral positive defocus area 12, to stimulate the eye axis development of children, prevent the eye axis development of children is bad.

[0060] Please refer to Figures 7-8 In the embodiment of the utility model, glasses 2 still include at least two groups of single vision lens 23 arranged in pairs, the refractive power of each group of single vision lens 23 is different, and the frame 21 around frame 22 is provided with clamping groove 221, and the single vision lens 23 is provided with buckle 232, and the single vision lens 23 is clamped on the frame 22 through buckle 232 and clamping groove 221.

[0061] By setting buckle 232 on single vision lens 23, and setting clamping groove 221 on frame 22, so that when the vision of the hyperopia children recovers to different degrees, the single vision lens 23 with corresponding refractive power can be equipped according to the recovery degree of eye, and then the single vision lens 23 is clamped on the frame 22, so that the hyperopia children can be corrected under the joint action of multifocal defocus lens 1 and single vision lens 23, so that the degree of multifocal defocus lens 1 is gradually reduced according to the recovery condition of the hyperopia children, which helps the eye axis development of the hyperopia children, and promotes the vision recovery of the hyperopia children.

[0062] In one example, the hyperopia degree of the child hyperopia patient is recovered from +8.0D to +6.0D, that is, the vision of the surface child hyperopia patient is recovered by -2.0D, at this time, the child hyperopia patient can configure the dioptric power of the single-vision lens 23 as -2.0D, and clasp the single-vision lens 23 on the frame 22, so as to correct the vision of the child hyperopia patient under the action of the multifocal defocus lens 1 and the single-vision lens 23, and promote the vision recovery of the child hyperopia patient.

[0063] In the above embodiment, the frame 22 is provided with a first lens groove 222 and a second lens groove 223, wherein the multifocal defocus lens 1 is clamped in the first lens groove 222 to fix the multifocal defocus lens 1 under the action of the first lens groove 222, and the single-vision lens 23 is clamped in the second lens groove 223 and achieves the detachable effect through the clamping of the buckle 232 and the clamping groove 221, so as to facilitate taking out the single-vision lens 23 from the second lens groove 223 when the vision of the child hyperopia patient is recovered, and replacing the single-vision lens 23 with a corresponding dioptric power to be clamped in the second lens groove 223, so as to promote the vision recovery of the child hyperopia patient.

[0064] In the above embodiment, the single-vision lens 23 is provided with a connecting frame 231 around the periphery, the buckle 232 is fixed around the periphery of the connecting frame 231, and the frame 22 is provided with a clamping groove 221 corresponding to the position of the buckle 232 around the periphery, so that when the single-vision lens 23 is installed on the frame 22, the buckle 232 around the periphery and the clamping groove 221 around the periphery are clamped, so as to strengthen the connection stability of the single-vision lens 23 and the frame 22, and prevent the single-vision lens 23 from falling off.

[0065] In the above embodiment, the clamping groove 221 is provided with a baffle 2211 and a spring 2212, wherein the baffle 2211 is in sliding connection with the clamping groove 221, and the spring 2212 is located in the clamping groove 221 and abuts against the bottom of the baffle 2211 at one end and abuts against the bottom of the clamping groove 221 at the other end, so as to press the baffle 2211 to adhere to the connecting frame 231 under the action of the spring 2212, and make the baffle 2211 abut against the buckle 232 to prevent the buckle 232 from separating from the clamping groove 221. When it is needed to replace the single-vision lens 23, the baffle 2211 is pressed and slid downward, so as to move the baffle 2211 away from the buckle 232, so that the buckle 232 can slide out of the clamping groove 221, and then the single-vision lens 23 can be taken out from the frame 22, facilitating the replacement of the single-vision lens 23.

[0066] In the utility model, unless another definite provision and limitation, first feature is on second feature "on" or "under", can be first and second feature direct contact, or first and second feature indirectly contact through intermediate medium. Moreover, first feature is on second feature "on", "above" and "on", can be first feature is on second feature directly or obliquely, or just indicate first feature horizontal height is higher than second feature. First feature is on second feature "under", "below" and "under", can be first feature is on second feature directly or obliquely, or just indicate first feature horizontal height is less than second feature.

[0067] The preferred embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to this. In the technical concept range of the utility model, the technical scheme of the utility model can be carried out in multiple simple variations, including each specific technical feature is combined in any suitable mode, in order to avoid unnecessary repetition, the utility model does not again explain another various possible combination mode. But these simple variations and combination should also be regarded as the content disclosed by the utility model, all belong to the protection range of the utility model.

[0068] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and cannot be understood as the limitation of the utility model, and the ordinary skilled in the art can change, modify, replace and vary the above-mentioned embodiments within the scope of the utility model.

Claims

1. A multifocal defocus lens for promoting axial eye 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 clear vision 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 direction; the defocus microlenses in the peripheral positive defocus area are uniformly distributed or the number of the defocus microlenses on the upper and lower sides of the peripheral positive defocus area is different.

2. The multi-focal, echelette lens that facilitates axial elongation according to claim 1, wherein, The defocus microlenses in the peripheral positive defocus area are uniformly distributed in concentric circles, and the difference in defocus amount of the defocus microlenses on adjacent two concentric circles ranges from 0.05D to 1.00D.

3. The multi-focal, echelette lens that facilitates axial elongation according to claim 2, wherein, The diameter of the defocus microlens is 0.6mm, the spacing between adjacent two concentric circles is equal, and the spacing between adjacent two defocus microlenses is 0.6mm.

4. The multi-focal, echelette lens to facilitate axial elongation according to claim 2, wherein, The diameter of the defocus microlens is 0.6mm, and the spacing of the concentric circles increases from inside to outside. The spacing between adjacent two concentric circles in the innermost layer is Ymm, and the spacing between adjacent two concentric circles increases by (Y*1.005)mm to (Y*1.1)mm outwardly.

5. The emmetropization facilitating multifocal-vision lens of claim 1, wherein, The diameter of the multifocal defocus lens ranges from 70mm to 80mm, and the diameter of the central clear vision area ranges from 8mm to 15mm.

6. The emmetropization facilitating multifocal-vision lens of claim 1, wherein, The peripheral positive defocus area adopts a multifocal point-shaped defocus microlens design, the point-shaped defocus microlenses are distributed in a matrix form, and the outer layer of adjacent multifocal point-shaped defocus microlenses is 1.1 to 1.3 times the number of the inner layer. 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 emmetropization facilitating multifocal-vision lens of claim 1, wherein, The peripheral positive defocus area adopts a ring-shaped defocus design, the refractive range of the central clear vision area is +3.0D to +12.0D, and the defocus amount of the ring-shaped defocus is -2.0D to -4.0D.

8. The emmetropization facilitating multifocal-vision lens of claim 1, wherein, The two sides of the multifocal defocus lens respectively adopt point-shaped defocus microlens distribution and ring-shaped defocus distribution; or the upper and lower sides of the peripheral positive defocus area respectively adopt ring-shaped defocus distribution and point-shaped defocus microlens distribution.

9. The emmetropization facilitating multifocal-vision lens of claim 1, wherein, The material of the multifocal defocus lens is resin or PC material.

10. An eyeglass to promote axial eye growth, characterized by, The eyeglasses comprise a frame, at least two pairs of single-vision lenses arranged in pairs, and the multifocal defocus lens according to any one of claims 1-9, the left and right sides of the frame are symmetrically provided with mirror frames, and the multifocal defocus lens is installed in the two mirror frames; The refractive power of each pair of single-vision lenses is different, the frame around the mirror frame is provided with a clamping groove, the single-vision lens is provided with a buckle, and the single-vision lens is clamped on the mirror frame through the buckle and the clamping groove.

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