Myopia prevention and control defocus film

Abstract

The utility model relates to a myopia prevention and control out-of-focus film which comprises a film main body, and the film main body is adhered to one side, back on to eyes, of a spectacle lens; a multifunctional area is arranged in the middle of the membrane main body; the multifunctional area comprises a refraction correction area and a multifunctional prevention and control area; the refraction correction area is located in the center of the film body, and the multifunctional prevention and control area surrounds the refraction correction area. The multifunctional prevention and control area comprises a positive defocus area, a negative defocus area and two low-contrast areas; the positive defocus area and the negative defocus area are located on the two sides of the refraction correction area, and the two low-contrast areas are located at the upper position and the lower position of the refraction correction area respectively. And the areas of the positive defocus region, the negative defocus region and the low-contrast region are the same. The myopia prevention and control device has the advantages that the refraction correction area and the multifunctional prevention and control area work cooperatively, the myopia prevention and control effect is greatly improved, the adjusting burden of eyes is relieved, the myopia deepening risk caused by long-time close-range eye using can be reduced, and the double purposes of vision correction and myopia prevention and control are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical tool technical field especially relates to a myopia prevention and control defocus film. BACKGROUND

[0002] In optical intervention, defocus lenses are widely recognized as one of the effective means of myopia control.

[0003] The core principle of defocus lenses is to produce appropriate defocus signals in front of the retina or behind the retina to inhibit the abnormal growth of the eye axis, achieving the purpose of preventing and controlling myopia. However, the existing defocus lens design still has some challenges in controlling the effect of myopia, for example, the patent with publication number CN221039670U discloses a myopia lens and a myopia glasses. The myopia lens includes a lens base, and a defocus film layer and a purple light film layer are sequentially pasted on the front surface of the lens base, and the purple light film layer can transmit purple light with a wavelength of 360-400nm. This design, on the basis of using the defocus film layer to curb the eye axis and the progress of myopia, supplements the purple light irradiation, and further enhances the myopia prevention and control effect. But this design is essentially still a single prevention and control means. Although it combines defocus and purple light irradiation, the myopia prevention and control effect is not good when facing complex myopia causes and individual differences. SUMMARY

[0004] (I) Technical problem to be solved

[0005] In view of the above shortcomings and deficiencies of the prior art, the utility model provides a myopia prevention and control defocus film, which solves the technical problem of single myopia prevention and control means and poor prevention and control effect of the prior art.

[0006] (II) Technical scheme

[0007] In order to achieve the above purpose, the main technical scheme adopted by the utility model includes:

[0008] The utility model provides a myopia prevention and control defocus film, which includes a film main body, the film main body is pasted on the side of the glasses lens away from the eye, a multifunctional area is arranged in the middle of the film main body, the multifunctional area includes a refractive correction area and a multifunctional prevention and control area, the refractive correction area is located at the center of the film main body, and the multifunctional prevention and control area surrounds the refractive correction area, the multifunctional prevention and control area includes a positive defocus area, a negative defocus area and two low contrast areas, the positive defocus area and the negative defocus area are located on both sides of the refractive correction area, and the two low contrast areas are located above and below the refractive correction area respectively, and the areas of the positive defocus area, the negative defocus area and the low contrast area are the same.

[0009] Optionally, the positive defocus area includes a plurality of first microlenses, the plurality of first microlenses are arranged in the form of a fan ring, the size of the plurality of first microlenses gradually decreases from the center to the edge, and the arrangement density of the plurality of first microlenses gradually increases.

[0010] Optionally, the defocus amount of the first microlens is +2.50D to +4.50D.

[0011] Optionally, the negative defocus area comprises a plurality of second microlenses; the plurality of second microlenses are arranged in a fan ring shape, the size of the plurality of second microlenses gradually decreases from the center to the edge, and the arrangement density of the plurality of second microlenses gradually increases.

[0012] Optionally, the defocus amount of the second microlens is -1.00D to -2.75D.

[0013] Optionally, the shape of the first microlens is circular; the shape of the second microlens is elliptical, and the long axis direction of the second microlens extends along the radial direction of the negative defocus area.

[0014] Optionally, the low-contrast area comprises a plurality of third microlenses and a plurality of fourth microlenses; the plurality of third microlenses and the plurality of fourth microlenses are alternately arranged to form a fan ring-shaped low-contrast area; from the center to the edge, the spacing of the third microlenses and the fourth microlenses gradually decreases.

[0015] Optionally, the defocus amount of the third microlens is +1.00D to +2.50D; the defocus amount of the fourth microlens is -1.00D to -1.75D.

[0016] Optionally, the shape of the third microlens and the fourth microlens is circular.

[0017] Optionally, the shape of the refractive correction area is circular, and the diameter is 4-6mm; the shape of the multifunctional prevention and control area is a circular ring, the inner diameter is 4-6mm, and the outer diameter is 40-50mm.

[0018] (Three) beneficial effects

[0019] The beneficial effects of the utility model are:

[0020] The myopia prevention and control defocus film has a refractive correction area in the middle of the film main body, which can correct the vision of the wearer. The light entering the eye can be accurately focused on the retina through the refractive correction area, so that the wearer can obtain clear and sharp visual effects when looking at objects in front, meet the basic needs of clear vision in daily work, study and life, and improve the visual quality. The multifunctional prevention and control area around the refractive correction area integrates the positive defocus area, the negative defocus area and the low contrast area, and prevents and controls myopia from multiple dimensions. The positive defocus area forms a defocus signal in front of the retina, effectively inhibits the abnormal growth of the eye axis, which is a key link of myopia prevention and control; the negative defocus area further adjusts the growth and development of the eyeball through stimulation of the accommodation response; and the two low contrast areas stimulate the accommodation system of the eye and enhance the accommodation ability of the eye by reducing the visual contrast, so as to comprehensively curb the development of myopia. The positive defocus area, the negative defocus area and the low contrast area have the same area, so that the prevention and control effects of the areas can be balanced. The prevention and control effect imbalance problem caused by the area of a certain area being too large or too small is avoided, so that the defocus film can provide stable and continuous myopia prevention and control protection for the eye in different directions and visual field ranges, comprehensively covers all visual areas of the eye, and effectively reduces the risk of deepening myopia. Compared with the prior art, the refractive correction area and the multifunctional prevention and control area work together, the myopia prevention and control effect is greatly improved, the accommodation burden of the eye is reduced, the risk of deepening myopia caused by long time close eye use is reduced, and the dual goals of visual correction and myopia prevention and control are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a front view schematic diagram of the myopia prevention and control defocus film in embodiment 1 of the utility model.

[0022] Figure 2 It is a side view schematic diagram of the myopia prevention and control spectacle lens in embodiment 2 of the utility model.

[0023]

BRIEF DESCRIPTION OF DRAWINGS

[0024] 1: film main body; 2: refractive correction area; 3: positive defocus area; 31: first microlens; 4: negative defocus area; 41: second microlens; 5: low contrast area; 51: third microlens; 52: fourth microlens. DETAILED DESCRIPTION

[0025] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0026] Example 1:

[0027] like Figure 1 As shown, this embodiment provides a myopia control defocus film, including a film body 1, which is attached to the side of the eyeglass lens facing away from the eye. A multifunctional area is provided in the middle of the film body 1. The multifunctional area includes a refractive correction area 2 and a multifunctional control area. The refractive correction area 2 is located at the center of the film body 1, and the multifunctional control area surrounds the refractive correction area 2. The multifunctional control area includes a positive defocus area 3, a negative defocus area 4, and two low-contrast areas 5. The positive defocus area 3 and the negative defocus area 4 are located on both sides of the refractive correction area 2, and the two low-contrast areas 5 are located above and below the refractive correction area 2, respectively. The positive defocus area 3, the negative defocus area 4, and the low-contrast area 5 have the same area.

[0028] Specifically, the refractive correction zone 2 in the center of the membrane body 1 is located centrally and can correct the wearer's vision. The refractive correction zone 2 ensures that light entering the eye is accurately focused on the retina, allowing the wearer to obtain clear and sharp visual effects when looking at objects directly in front, meeting the basic needs for clear vision in daily work, study, and life, and improving visual quality. Surrounding the refractive correction zone 2 is a multi-functional control zone integrating a positive defocus zone 3, a negative defocus zone 4, and a low-contrast zone 5, controlling myopia from multiple dimensions. The positive defocus zone 3 forms a defocus signal in front of the retina, effectively inhibiting abnormal growth of the eye axis, which is a key link in myopia control; the negative defocus zone 4 further regulates the growth and development of the eyeball by stimulating the accommodative response; the two low-contrast zones 5 stimulate the eye's accommodative system by reducing visual contrast, enhancing the eye's accommodative ability, thereby comprehensively curbing the development of myopia. The positive defocus zone 3, negative defocus zone 4, and low-contrast zone 5 are of equal area, ensuring that the control effects of each area are balanced. This design avoids the imbalance in myopia control caused by an area being too large or too small, ensuring that the defocus membrane provides stable and continuous myopia control protection for the eyes in different directions and within the field of vision. It comprehensively covers all visual areas of the eye, effectively reducing the risk of myopia progression. Compared to existing technologies, the refractive correction zone 2 works in tandem with the multifunctional control zone, significantly improving myopia control effectiveness. This reduces the accommodative burden on the eyes and also decreases the risk of myopia progression due to prolonged close-range eye use, achieving the dual goals of visual correction and myopia control.

[0029] Further, as shown in Figure 1 The positive defocus area 3 includes a plurality of first microlenses 31; the plurality of first microlenses 31 are arranged in a fan ring shape, and the size of the plurality of first microlenses 31 gradually decreases from the center to the edge, and the arrangement density of the plurality of first microlenses 31 gradually increases. The positive defocus area 3 can generate defocus signals of different intensities at different positions, and the central area provides a relatively weak defocus stimulus to meet the needs of the eye when looking at relatively close objects; and the edge area can generate stronger defocus signals due to the small size and high density of the microlenses, which can more effectively inhibit the axial length growth, especially when the eye looks at distant objects, the defocus effect on the peripheral retina is strengthened, and the myopia development is prevented in all directions. In this embodiment, the defocus amount of the first microlens 31 is +2.50D~+4.50D, which is moderate and has a certain span. For wearers with mild myopia (-3.00D and below), the defocus amount is set to +1.50D~+2.50D; for moderate myopia (-3.00D to -6.00D), the defocus amount is +2.50D~+3.50D; and for high myopia (-6.00D and above), the defocus amount is +3.50D~+4.50D. For people with different degrees of myopia and eye habits, the defocus signal of appropriate intensity can be formed in front of the retina, which can effectively inhibit the abnormal growth of the axial length, accurately adapt to the myopia prevention and control needs of different users, and ensure the effectiveness and stability of the prevention and control effect.

[0030] Further, as shown in Figure 1 The negative defocus area 4 includes a plurality of second microlenses 41; the plurality of second microlenses 41 are arranged in a fan ring shape, and the size of the plurality of second microlenses 41 gradually decreases from the center to the edge, and the arrangement density of the plurality of second microlenses 41 gradually increases. The negative defocus area 4 corresponds to the positive defocus area 3 to generate defocus signals of different intensities behind the retina. According to different viewing angles and distances of the eye, dynamic defocus stimulation is provided to the retina, which can effectively adjust the accommodation response of the eye, further assist in myopia prevention and control, and make the prevention and control system of the defocus film more perfect. In this embodiment, the defocus amount of the second microlens 41 is -1.00D~ -2.75D, which can generate appropriate defocus effect behind the retina, stimulate the accommodation system of the eye, and promote the eye to maintain good accommodation ability. For myopia patients, the accommodation function of the eye can be better balanced, the speed of myopia deepening can be slowed down, and the defocus amount of the positive defocus area 3 can be matched to achieve comprehensive myopia prevention and control.

[0031] Furthermore, in this embodiment, the first microlens 31 is designed as a circle. The symmetry of the circle makes its refraction of light more uniform in all directions, and can stably form a defocus signal in front of the retina. The second microlens 41 is designed as an ellipse with its major axis extending radially along the negative defocus area 4. This unique shape can more effectively change the direction of light propagation according to the functional requirements of the negative defocus area 4, generate a defocus signal with a specific direction and intensity behind the retina, enhance the control effect of the negative defocus area 4, and at the same time cooperate with the circular first microlens 31 to optimize the optical performance of the entire multifunctional control area.

[0032] Furthermore, such as Figure 1 As shown, the low-contrast zone 5 includes multiple third microlenses 51 and multiple fourth microlenses 52; the multiple third microlenses 51 and multiple fourth microlenses 52 are arranged alternately to form a fan-shaped low-contrast zone 5; from the center to the edge, the distance between the third microlenses 51 and the fourth microlenses 52 gradually decreases. This produces a gradual low-contrast effect in the low-contrast zone 5, gradually increasing the stimulation to the eye's accommodation system from the center to the edge. Under different viewing distances and angles, it can effectively stimulate the eye's accommodation, exercising the eye's accommodative ability and providing another dimension of protection for myopia prevention and control. In this embodiment, the defocus amount of the third microlens 51 is +1.00D to +2.50D; the defocus amount of the fourth microlens 52 is -1.00D to -1.75D. The positive defocus amount of the third microlens 51 and the negative defocus amount of the fourth microlens 52 work together to produce appropriate defocus changes in the low-contrast zone 5, thereby reducing visual contrast, stimulating the eye's accommodation function, preventing the eye from declining its accommodation function due to prolonged exposure to the same visual state, and further improving the myopia prevention and control effect. In this embodiment, the third microlens 51 and the fourth microlens 52 are circular in shape. The geometric characteristics of a circle give it good symmetry when refracting light. When light passes through these circular microlenses, it can uniformly produce a defocusing effect within the low-contrast region 5, effectively reducing visual contrast. Compared to other shapes, when circular microlenses are arranged in a regular pattern, the defocus signal can be more stable and evenly distributed, avoiding uneven light refraction caused by the shape of the microlenses. This more effectively stimulates the eye's accommodation system, improves visual comfort, and provides stable and efficient low-contrast stimulation for myopia prevention and control.

[0033] Further, in the present embodiment, the refractive correction zone 2 is designed as a circle with a diameter of 4-6 mm, which can ensure that the wearer obtains clear vision when looking at objects directly in front, and will not affect the function of the surrounding multifunctional prevention and control zone due to the excessively large area. The multifunctional prevention and control zone is designed as a circular ring with an inner circle diameter of 4-6 mm and an outer circle diameter of 40-50 mm, which is a reasonable size design, can provide sufficient area for the positive defocus zone 3, the negative defocus zone 4 and the low-contrast zone 5 in a limited space, so that they can fully play their respective prevention and control functions, and at the same time work with the refractive correction zone 2 to achieve the dual goals of visual correction and myopia prevention and control.

[0034] Embodiment 2:

[0035] As shown in Figure 2 The present embodiment provides a myopia prevention and control spectacle lens, which comprises a lens body and a myopia prevention and control defocus film as described in embodiment 1, and the myopia prevention and control defocus film is tightly pasted on the side of the lens body away from the eye by a bonding process using optical glue. The optical glue has the characteristics of high transparency and low refractive index, which ensures that the propagation of light between the lens and the defocus film is not affected after the defocus film is pasted, and no additional refraction and scattering is generated, thereby ensuring the stability of the visual effect. At the same time, the bonding process ensures that there is no air bubble and gap between the defocus film and the lens body, so that the two are tightly combined as a whole, avoiding the defocus film from falling off or affecting its optical performance due to bonding problems.

[0036] Further, in the present embodiment, the third microlens 51 and the fourth microlens 52 of the low-contrast zone 5 are square in shape, and the edges and corners of the square can change the propagation path of the light, produce a unique optical effect, and be beneficial to forming a uniform and stable low-contrast environment in the low-contrast zone 5. Compared with other shapes, the square microlens can better realize the interference and scattering of light when arranged regularly, enhance the low-contrast effect, and more effectively stimulate the accommodation system of the eye to play a unique role in myopia prevention and control.

[0037] In the description of the present utility model, it is to be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0038] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect;Can be two element inside communication or two element mutual action relation.For ordinary skilled person in the art, can understand the specific meaning of above-mentioned terms in the utility model according to specific circumstances.

[0039] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect;Can be two element inside communication or two element mutual action relation.For ordinary skilled person in the art, can understand the specific meaning of above-mentioned terms in the utility model according to specific circumstances.

[0040] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0041] Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application. The ordinary skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. A myopia prevention and control through defocus film, comprising a film body (1), characterized in that the film body (1) is attached to the side of the spectacle lens away from the eye; and a multifunctional area is arranged in the middle of the film body (1).

2. The myopia prevention and control through defocus film according to claim 1, characterized in that the multifunctional area comprises a refractive correction area (2) and a multifunctional prevention and control area.

3. The myopia prevention and control through defocus film according to claim 2, characterized in that the refractive correction area (2) is located at the center of the film body (1), and the multifunctional prevention and control area surrounds the refractive correction area (2).

4. The myopia prevention and control through defocus film according to claim 3, characterized in that the multifunctional prevention and control area comprises a positive defocus area (3), a negative defocus area (4) and two low-contrast areas (5).

5. The myopia prevention and control through defocus film according to claim 4, characterized in that the positive defocus area (3) and the negative defocus area (4) are located on both sides of the refractive correction area (2), and the two low-contrast areas (5) are located above and below the refractive correction area (2), respectively.

6. The myopia prevention and control through defocus film according to claim 5, characterized in that the positive defocus area (3), the negative defocus area (4) and the low-contrast area (5) have the same area.

7. The myopia prevention and control through defocus film according to claim 2, characterized in that the positive defocus area (3) comprises a plurality of first microlenses (31).

8. The myopia prevention and control through defocus film according to claim 7, characterized in that the plurality of first microlenses (31) are arranged in a fan ring shape, and the size of the plurality of first microlenses (31) gradually decreases from the center to the edge, and the arrangement density of the plurality of first microlenses (31) gradually increases.

9. The myopia prevention and control through defocus film according to claim 8, characterized in that the defocus amount of the first microlens (31) is +2.50D to +4.50D.

10. The myopia prevention and control through defocus film according to claim 9, characterized in that the negative defocus area (4) comprises a plurality of second microlenses (41).

11. The myopia prevention and control through defocus film according to claim 10, characterized in that the plurality of second microlenses (41) are arranged in a fan ring shape, and the size of the plurality of second microlenses (41) gradually decreases from the center to the edge, and the arrangement density of the plurality of second microlenses (41) gradually increases.

12. The myopia prevention and control through defocus film according to claim 11, characterized in that the defocus amount of the second microlens (41) is -1.00D to -2.75D.

13. The myopia prevention and control through defocus film according to claim 12, characterized in that the shape of the first microlens (31) is circular.

14. The myopia prevention and control through defocus film according to claim 13, characterized in that the shape of the second microlens (41) is elliptical, and the long axis direction of the second microlens (41) extends along the radial direction of the negative defocus area (4).

15. The myopia prevention and control through defocus film according to claim 1, characterized in that the low-contrast area (5) comprises a plurality of third microlenses (51) and a plurality of fourth microlenses (52).

16. The myopia prevention and control through defocus film according to claim 15, characterized in that the plurality of third microlenses (51) and the plurality of fourth microlenses (52) are alternately arranged in a fan ring shape to form the low-contrast area (5), and the spacing between the third microlenses (51) and the fourth microlenses (52) gradually decreases from the center to the edge.

17. The myopia prevention and control through defocus film according to claim 16, characterized in that the defocus amount of the third microlens (51) is +1.00D to +2.50D, and the defocus amount of the fourth microlens (52) is -1.00D to -1.75D.

18. The myopia prevention and control through defocus film according to claim 17, characterized in that the shape of the third microlens (51) and the fourth microlens (52) is circular.

19. The myopia prevention and control through defocus film according to claim 1, characterized in that the shape of the refractive correction area (2) is circular, and the diameter of the refractive correction area (2) is 4 to 6 mm. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The shape of the multifunctional prevention and control area is a circular ring, the inner circle diameter is 4-6 mm, and the outer circle diameter is 40-50 mm.

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