Lens for delaying growth of ocular axis by using negative defocus technology

Abstract

The utility model discloses a lens for delaying eye axis growth by using a negative defocus technology, particularly relates to the field of optical spectacle lenses, and aims to solve the problems that myopia of children and adolescents in China is severe, low-age and severe, existing common methods include angle molding, defocus and foggy vision (point diffusion), and the prevention and control efficiency is declined due to the large use of the methods. According to the utility model, myopia can be better prevented and controlled, and the prevention and control efficiency is improved. A composite ring belt design is adopted, the defocusing amount of an aspheric micro lens in a composite ring belt structure is negative defocusing, and the range of the defocusing amount of the aspheric micro lens is-5.0 D-(-6.5 D). While clear vision correction is ensured in an optical central area, the defocusing amount of a ring belt outside the central area is in an asymptotically increasing trend, so that continuous defocusing is formed in a peripheral area, and the visual acuity is improved. And personalized compensation is carried out on the defocusing amount of the field angle to form a continuous myopia defocusing state, so that excessive increase of the ocular axis and the diopter is delayed, and the purpose of controlling myopia is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical spectacle lens technical field, concretely is a lens of delaying eye axis growth by negative defocus technology. BACKGROUND

[0002] The incidence of myopia is increasing globally, and it is estimated that the number of myopic people will increase from 2 billion to 5 billion by 2050. At the same time, high myopia can lead to eye health risks, vision impairment or permanent vision loss. Therefore, it is urgent to manage myopia in adolescents. Adolescents' eyeballs are in the growth and development stage, and their accommodation ability is strong and easy to be affected by various factors. The occurrence and development of myopia have the characteristics of gradualness, superposition and irreversibility, and once formed, it will lose the opportunity to prevent and control. Therefore, the research on prevention and control methods of myopia in adolescents has very important medical and social significance.

[0003] Traditional lenses mainly seek to correct the vision of eyes that already have refractive errors. Such lenses are in the form of relief to solve the defects of the eyes. After wearing such lenses (e.g. single vision lenses), the vision will inevitably deteriorate further (e.g. myopia will further deepen). People would prefer to actively control refractive errors (e.g. myopia, nearsightedness, etc.) to prevent further deterioration of vision. Therefore, spectacle lenses are developing new functional lenses with myopia control effects on the basis of traditional single vision lenses.

[0004] However, the existing methods for managing myopia in adolescents include optical intervention, drug intervention, surgical intervention and outdoor activities. Optical intervention uses progressive, angle, prism, and defocus lenses to manage myopia, but progressive lenses and peripheral defocus lenses have been on the market for a short time and have not shown significant clinical results. The current situation of myopia in children and adolescents in China is severe, with a low age and high severity. The commonly used methods are angle, defocus, and fog (point spread), and the effectiveness of these methods is declining. SUMMARY

[0005] The utility model aims at providing a lens for delaying eye axis growth by negative defocus technology to solve the problems in the background art.

[0006] In order to solve the above technical problems, the utility model provides the following technical scheme: a lens for delaying eye axis growth by using negative defocus technology, including the spectacle lens body, the first optical surface of one end close to the eye side of the spectacle lens body, the second optical surface of one end away from the eye side of the spectacle lens body, the middle position of the spectacle lens body is provided with the central optical area, a plurality of light diffusion points are arranged on the outside of the central optical area of the first optical surface, a plurality of aspheric microlens are arranged on the outside of the central optical area of the second optical surface and form a composite ring structure, the composite ring structure is composed of a plurality of aspheric microlenses, and the defocus amount of the aspheric microlens is in the range of -5.0D to -6.5D.

[0007] In a preferred embodiment, the composite ring structure is provided with fifteen rings, which are respectively a first composite ring, a second composite ring, a third composite ring, a fourth composite ring, a fifth composite ring, a sixth composite ring, a seventh composite ring, an eighth composite ring, a ninth composite ring, a tenth composite ring, an eleventh composite ring, a twelfth composite ring, a thirteenth composite ring, a fourteenth composite ring and a fifteenth composite ring.

[0008] In a preferred embodiment, the defocus amount of the aspheric microlenses in the first composite ring 1501 and the second composite ring 1502 is -5.0D, the defocus amount of the aspheric microlenses in the third composite ring 1503 and the fourth composite ring 1504 is -5.25D, the defocus amount of the aspheric microlenses in the fifth composite ring 1505 and the sixth composite ring 1506 is -5.5D, the defocus amount of the aspheric microlenses in the seventh composite ring 1507 and the eighth composite ring 1508 is -5.75D, the defocus amount of the aspheric microlenses in the ninth composite ring 1509 and the tenth composite ring 1510 is -6.0D, the defocus amount of the aspheric microlenses in the eleventh composite ring 1511 and the twelfth composite ring 1512 is -6.25D, and the defocus amount of the aspheric microlenses in the thirteenth composite ring 1513, the fourteenth composite ring 1514 and the fifteenth composite ring 1515 is -6.5D.

[0009] In a preferred embodiment, the diameter of the central optical area is 7.5-7.8mm.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] 1. The utility model discloses a composite ring belt design, the off-axis amount of aspheric microlens in composite ring belt structure is all negative off-axis setting, guaranteeing clear corrective vision in optical center area, and the off-axis amount of ring belt outside the center area is in asymptotic increasing trend, making the peripheral area form continuous off-axis, and individualized compensation is carried out to the off-axis amount of field angle, forming continuous myopia off-axis state, thereby delaying the excessive increase of eye axis and diopter, and reaching the purpose of controlling myopia.

[0012] 2. The utility model discloses a unique point matrix mirror surface formed by superimposed point diffusion technology, which effectively forms an artificial low-contrast environment and improves visual imaging quality under the premise of peripheral myopia off-axis. DRAWINGS

[0013] The drawings are used to provide further understanding of the utility model and constitute a part of the specification, and are used to explain the utility model together with the embodiments of the utility model, and do not constitute the limitation to the utility model. In the drawings:

[0014] Fig. 1 It is the cross section structure schematic diagram of the utility model lens body;

[0015] Fig. 2 It is the plane structure schematic diagram of the utility model lens body.

[0016] In the drawing: 1, lens body;11, first optical surface;12, second optical surface;13, center optical area;14, light diffusion point;15, composite ring belt structure;1501, first composite ring belt ring;1502, second composite ring belt ring;1503, third composite ring belt ring;1504, fourth composite ring belt ring;1505, fifth composite ring belt ring;1506, sixth composite ring belt ring;1507, seventh composite ring belt ring;1508, eighth composite ring belt ring;1509, ninth composite ring belt ring;1510, tenth composite ring belt ring;1511, eleventh composite ring belt ring;1512, twelfth composite ring belt ring;1513, thirteenth composite ring belt ring;1514, fourteenth composite ring belt ring;1515, fifteenth composite ring belt ring. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0018] Please refer to Figs. 1-2The utility model provides a kind of lens for delaying ocular axis growth using negative defocus technology, including spectacle lens body 1, the first optical surface 11 of one end of spectacle lens body near eye side, the second optical surface 12 of one end of spectacle lens body 1 far from eye side, the middle position of spectacle lens body 1 is set as center optical zone 13, a plurality of light diffusion points 14 are arranged on the first optical surface 11 outside center optical zone 13, the second optical surface 12 outside center optical zone 13 is provided with the composite ring belt structure 15 of a plurality of aspherical microlens, the composite ring belt structure 15 adopts a plurality of aspherical microlenses, and the defocus amount range of the aspherical microlens is-5.0D-(-6.5D).

[0019] In a preferred embodiment, the composite ring belt structure 15 is provided with fifteen rings, respectively first composite ring belt ring 1501, second composite ring belt ring 1502, third composite ring belt ring 1503, fourth composite ring belt ring 1504, fifth composite ring belt ring 1505, sixth composite ring belt ring 1506, seventh composite ring belt ring 1507, eighth composite ring belt ring 1508, ninth composite ring belt ring 1509, tenth composite ring belt ring 1510, eleventh composite ring belt ring 1511, twelfth composite ring belt ring 1512, thirteenth composite ring belt ring 1513, fourteenth composite ring belt ring 1514 and fifteenth composite ring belt ring 1515, the defocus amount of aspherical microlens in the first composite ring belt ring 1501 and the second composite ring belt ring 1502 is-5.0D, the defocus amount of aspherical microlens in the third composite ring belt ring 1503 and the fourth composite ring belt ring 1504 is-5.25D, the defocus amount of aspherical microlens in the fifth composite ring belt ring 1505 and the sixth composite ring belt ring 1506 is-5.5D; the defocus amount of aspherical microlens in the seventh composite ring belt ring 1507 and the eighth composite ring belt ring 1508 is-5.75D, the defocus amount of aspherical microlens in the ninth composite ring belt ring 1509 and the tenth composite ring belt ring 1510 is-6.0D, the defocus amount of aspherical microlens in the eleventh composite ring belt ring 1511 and the twelfth composite ring belt ring 1512 is-6.25D, the defocus amount of aspherical microlens in the thirteenth composite ring belt ring 1513, the fourteenth composite ring belt ring 1514 and the fifteenth composite ring belt ring 1515 is-6.5D.

[0020] Specifically, in use, the composite ring belt structure of the embodiment adopts a circular structure (which can also be a regular hexagonal or octagonal structure), and the diameter of each microlens is 1.14 mm, wherein the distance of each composite ring belt ring center from the center optical zone 13, the number of microlenses in each composite ring belt ring and the defocus amount are shown in Table 1:

[0021]

[0022] Table I

[0023] In a preferred embodiment, the diameter of the central optical zone 13 is 7.5-7.8 mm.

[0024] The utility model discloses a composite ring belt design, the off-focus amount of aspheric microlens in composite ring belt structure gradually increases from the center to the outside, avoids the single microlens structure to cause the jumping feeling of image, and the off-focus amount of aspheric microlens of adjacent ring belt ring in composite ring belt structure is positive and negative interlaced setting, in the periphery area of lens, in the premise of giving consideration to clear vision, does not affect visual quality and adds + 5.0D microlens structure, the distribution of microlens structure has relatively complex geometry space, therefore realizes irregular shape of retinal peripheral light, therefore reduces retinal nerve adaptation phenomenon, delays the decline of traditional lens optical control efficiency, and superimposed point diffusion technology forms unique dot matrix mirror, guarantees under the premise of peripheral myopia off-focus, effectively forms artificial low contrast environment, improves visual imaging quality.

[0025] Finally, it should be noted that: the above only for the preferred embodiments of the utility model have described, and not for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A lens that uses negative defocus technology to slow down the elongation of the axial length of the eye, comprising a lens body (1), wherein the end of the lens body near the eye is a first optical surface (11), and the end of the lens body (1) away from the eye is a second optical surface (12), characterized in that: The middle position of the lens body (1) is set as the central optical zone (13). A number of light diffusion points (14) are arranged around the central optical zone (13) on the first optical surface (11). A composite ring structure (15) composed of multiple aspherical microlenses is arranged on the second optical surface (12) outside the central optical zone (13). The composite ring structure (15) is composed of multiple aspherical microlenses, and the defocus range of the aspherical microlenses is -5.0D-(-6.5D).

2. The lens according to claim 1 that utilizes negative defocus technology to delay axial elongation, characterized in that: The composite ring structure (15) has fifteen rings, namely the first composite ring (1501), the second composite ring (1502), the third composite ring (1503), the fourth composite ring (1504), the fifth composite ring (1505), the sixth composite ring (1506), the seventh composite ring (1507), the eighth composite ring (1508), the ninth composite ring (1509), the tenth composite ring (1510), the eleventh composite ring (1511), the twelfth composite ring (1512), the thirteenth composite ring (1513), the fourteenth composite ring (1514), and the fifteenth composite ring (1515).

3. A lens for delaying axial elongation using negative defocus technology according to claim 2, characterized in that: The aspherical microlenses in the first and second composite rings (1501) have a defocusing amount of -5.0D; the aspherical microlenses in the third and fourth composite rings (1503) have a defocusing amount of -5.25D; the aspherical microlenses in the fifth and sixth composite rings (1505) have a defocusing amount of -5.5D; and the aspherical microlenses in the seventh and eighth composite rings (1507) have a defocusing amount of -5.0D. The defocusing amount of the microlens is -5.75D. The defocusing amount of the aspherical microlens in the ninth composite ring (1509) and the tenth composite ring (1510) is -6.0D. The defocusing amount of the aspherical microlens in the eleventh composite ring (1511) and the twelfth composite ring (1512) is -6.25D. The defocusing amount of the aspherical microlens in the thirteenth composite ring (1513), the fourteenth composite ring (1514) and the fifteenth composite ring (1515) is -6.5D.

4. A lens for delaying axial elongation using negative defocus technology according to claim 1, characterized in that: The diameter of the central optical region (13) is 7.5-7.8 mm.

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