A partitioned distance-vision alternating function lens and a manufacturing method thereof

Abstract

The application provides a partitioned far-near vision alternating function lens, which has good inhibitory effect on far vision, oblique vision and near vision through the combination and alternating layout design of far vision and near vision lenses. Technical points are as follows: the lens body is provided with a concentric ring structure on the surface, the concentric ring structure comprises a plurality of near vision ring areas and far vision ring areas arranged in the same center, the near vision ring areas and the far vision ring areas are arranged in cross-adjacent distribution from inside to outside, the central area of the concentric ring structure has a circular central far vision area, and the remaining area of the lens body after removing the concentric ring structure and the central far vision area is a transition area. The lens body adopts a partitioned structure, the far vision areas and the near vision areas with different curvature radii are arranged in a concentric ring shape, so that the central area has good near vision inhibition and astigmatism correction effect. Meanwhile, the independent transmittance of the polarization structure and each partition makes the far vision area and the near vision area form a grating, which has good correction effect on high far vision and oblique vision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lens design and manufacturing, in particular to a zoned far-vision and near-vision alternating function lens and a manufacturing method thereof. BACKGROUND

[0002] Resin lenses are a new type of lens material that is lightweight, durable, and impact-resistant. In recent decades, there have been studies on using resin lenses to inhibit the development of myopia in adolescents. Progressive lenses are a special type of lens that can automatically adjust the focal length as the wearer's gaze changes, allowing the wearer to see clearly at different distances. In recent years, studies have shown that progressive lenses can inhibit the development of myopia in adolescents. Specifically, progressive lenses can inhibit the development of myopia in adolescents in the following ways:

[0003] Reducing eye focusing on close objects: The main cause of adolescent myopia is prolonged close eye use, which leads to excessive eye focusing on close objects. Progressive lenses can reduce eye focusing on close objects by automatically adjusting the focal length, thereby reducing eye fatigue and visual stress.

[0004] Promoting eye accommodation: The development of adolescent myopia is related to eye accommodation. Progressive lenses can promote eye accommodation by automatically adjusting the focal length, thereby slowing down the development of myopia.

[0005] Improving visual comfort: The development of adolescent myopia is also related to visual comfort. Progressive lenses can improve visual comfort by automatically adjusting the focal length, thereby reducing eye fatigue and visual stress. It is important to note that the effect of progressive lenses is not very good, and studies have shown that the inhibitory effect on children with latent astigmatism is better. Double light plus prism is a special type of eyeglass lens that can adjust the visual focus by changing the refraction angle of light, allowing the wearer to see clearly at different distances. In recent years, studies have also shown that double light plus prism can inhibit the development of myopia in adolescents. However, both of the above methods are not very ideal. SUMMARY

[0006] The present application addresses the problems described in the background art by proposing a zoned far-vision and near-vision alternating function lens that has good inhibitory effects on far vision, astigmatism, and near vision through the combination and alternating layout design of far-vision and near-vision lenses.

[0007] To achieve the above-mentioned purposes, the present application adopts the following technical solutions:

[0008] A partitioned myopia-farsightedness alternating function lens comprises a lens body, a concentric ring structure is arranged on the surface of the lens body, the concentric ring structure comprises a plurality of myopia ring zones and farsightedness ring zones arranged concentrically, the myopia ring zones and the farsightedness ring zones are arranged in cross-adjacent distribution from inside to outside, and a central farsightedness zone in a circular shape is arranged in a central region of the concentric ring structure; and a remaining region of the lens body excluding the concentric ring structure and the central farsightedness zone is a transition zone.

[0009] Preferably, the myopia ring zones have a base I and a microstructure I, the base I diopter of any myopia ring zone increases by 1% relative to the base I diopter of the myopia ring zone adjacent to the inside of the myopia ring zone, the microstructure I is designed as a lenticule structure, the microstructure I diopter is designed as -1.0 to -10.0D, and a plurality of microstructures I are arranged in an array in the myopia ring zone and are centrally symmetric about the concentric ring structure center; and the farsightedness ring zones have a base II and a microstructure II, the base II diopter of any farsightedness ring zone increases by 1% relative to the base II diopter of the farsightedness ring zone adjacent to the inside of the farsightedness ring zone, the microstructure II is designed as a lenticule structure, the microstructure II diopter is designed as +4.0 to +10.0D, and a plurality of microstructures II are arranged in an array in the farsightedness ring zone and are centrally symmetric about the concentric ring structure center.

[0010] Preferably, the total number of the myopia ring zones and the farsightedness ring zones is 3 to 20; the inner diameter of the concentric ring structure is not less than 6 mm, the outer diameter of the concentric ring structure is not greater than 80 mm, and the difference between the inner diameter and the outer diameter of the concentric ring structure is 2 mm to 10 mm; and the diameter of the central farsightedness zone is 5 mm to 10 mm.

[0011] Preferably, the diameter of the microstructure I is 0.1 mm to 2 mm; and the diameter of the microstructure II is 0.1 mm to 2 mm.

[0012] Preferably, the refractive index and the Abbe number of the lens body satisfy the following conditions:

[0013] the refractive index is 1.67 and the Abbe number is greater than or equal to 30;

[0014] or the refractive index is 1.60 and the Abbe number is greater than or equal to 30;

[0015] or the refractive index is 1.55 and the Abbe number is greater than or equal to 30;

[0016] or the refractive index is 1.50 and the Abbe number is greater than or equal to 58.

[0017] Preferably, a polarizing film is arranged on the surface opposite to the surface on which the concentric ring structure is arranged, a hardening film is further arranged outside the polarizing film, and the polarizing film at least completely covers the concentric ring structure.

[0018] As preferably, the polarized film comprises a main film body and a secondary film body which are attached to each other, the main film body is arranged between the lens main body and the hardening film; the secondary film body is arranged between the lens main body and the main film body or between the hardening film and the main film body, and the lens main body, the main film body, the secondary film body and the hardening film are tightly attached at the contact position.

[0019] As preferably, the secondary film body is designed with a polarized area and a light transmission area, wherein the polarized area is in the form of a circular ring and covers the hyperopia ring area one by one, the light transmission area is in the form of a circular ring and covers the myopia ring area one by one, the transmittance of the polarized area is 38% to 42%, and the transmittance of the light transmission area is 50% to 64%.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] I. The lens main body adopts a partition structure, and the hyperopia area and the myopia area with different radii of curvature are arranged in the form of concentric rings, so that the central region has good myopia inhibition and astigmatism correction effect.

[0022] II. The lens main body surface is also provided with a polarized structure, and the polarized structure and each partition are provided with independent transmittance, so that the hyperopia area and the myopia area form a grating, which has good correction effect for high hyperopia and strabismus.

[0023] III. Each partition of the lens main body is equipped with a microstructure, and the optical area formed by the microstructure solves the problem that the myopia degree control effect of a single myopic defocus lens becomes worse over time.

[0024] The application also discloses a manufacturing method of the partition type hyperopia-myopia alternating function lens.

[0025] S1: Determine the size and geometric center of the lens main body, and determine that the geometric center and the optical center of the lens main body are consistent after four-point positioning of the mold position.

[0026] S2: According to the design data of the lens main body, a processing template is prepared, the lens center is calibrated on the template, and edge grinding, angle grinding and polishing are performed.

[0027] S3: The polarized film and the hardening film are attached to the lens main body in sequence, and then the transition area edge is subjected to secondary grinding treatment.

[0028] S4: The lens main body is subjected to secondary vacuum coating, and under the condition of vacuum, silicon dioxide and zirconium dioxide are coated according to the designed thickness, which can further improve the light transmission performance of the lens and improve the clarity of the lens.

[0029] The step S3 comprises the following steps:

[0030] S31: determining the lens body and the center axis point of the polarized film;

[0031] S32: cleaning the surface of the lens body;

[0032] S33: cutting the polarized film;

[0033] S34: attaching the polarized film to the inner surface of the lens body;

[0034] S35: attaching the hard film by soaking method. BRIEF DESCRIPTION OF DRAWINGS

[0035] Fig. 1 is a structural schematic diagram of an embodiment of the present application.

[0036] Fig. 2 is a structural and local enlarged schematic diagram of the concentric ring structure in the embodiment.

[0037] Fig. 3 is a sectional schematic diagram of the film-coated part of the lens body in the embodiment.

[0038] Fig. 4 is a structural schematic diagram of the inner surface of the lens body in the embodiment.

[0039] Reference signs: 1, lens body; 10, concentric ring structure; 2, myopic ring area; 20, base I; 21, microstructure I; 3, hyperopic ring area; 30, base II; 31, microstructure II; 4, central hyperopic area; 5, transition area; 6, polarized film; 60, main film body; 61, auxiliary film body; 611, polarized area; 612, light-transmitting area; 7, hard film. DETAILED DESCRIPTION

[0040] The present application will be further described below in conjunction with the drawings and embodiments:

[0041] Embodiment: The present application will be clearly explained below by means of drawings and detailed description. Any person skilled in the art can make changes and modifications to the technology taught by the present application without departing from the spirit and scope of the present application.

[0042] The terms used herein are only for describing specific embodiments and are not intended to limit the present application. The singular forms such as "a", "this", "this", "this" and "the" as used herein also include the plural forms.

[0043] As used herein, "connected" or "positioned" can mean that two or more components or devices are in direct physical contact with each other, or are indirectly in physical contact with each other, or can mean that two or more components or devices are in operation or action with each other.

[0044] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0045] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing this case.

[0046] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0047] Example 1:

[0048] like Figs. 1 to 4 The illustrated partitioned myopia-hyperopia alternation function lens includes a lens body 1. The lens body 1 is a multifocal microstructure lens. A concentric ring structure 10 is provided on the surface of the lens body 1. The concentric ring structure 10 includes several myopia ring areas 2 and hyperopia ring areas 3 arranged at the same center. The myopia ring areas 2 and hyperopia ring areas 3 are arranged in an alternating and adjacent manner from the inside to the outside. The central area of ​​the concentric ring structure 10 has a circular central hyperopia area 4. The remaining area of ​​the lens body 1 after removing the concentric ring structure 10 and the central hyperopia area 4 is a transition area 5.

[0049] Myopic ring region 2 has a base I20 and a microstructure I21. Except for the innermost myopic ring region 2, the refractive power of the base I20 of any myopic ring region 2 is increased by 1% relative to the refractive power of the base I20 of its inner adjacent myopic ring region 2. The microstructure I21 is designed as a microlens structure, and the refractive power of the microstructure I21 is designed to be -1.0 to -10.0D. Multiple microstructures I21 are arrayed in myopic ring region 2 and are centrally symmetrical about the center of the concentric ring structure 10. The hyperopic ring region 3 has a base II 30 and a microstructure II 31. Except for the innermost hyperopic ring region 3, the refractive power of the base II 30 of any hyperopic ring region 3 is 1% higher than that of its innermost adjacent hyperopic ring region 3. The microstructure II 31 is designed as a microlens structure, and the refractive power of the microstructure II 31 is designed to be +4.0 to +10.0D. Multiple microstructures II 31 are arrayed in the hyperopic ring region 3 and are centrally symmetrical about the center of the concentric ring structure 10. Because the curvatures of the myopic ring region 2 and the hyperopic ring region 3 are different, they correct different refractive powers. At the same time, the concentric ring structure 10 can effectively eliminate the spherical distortion of the transition region 5.

[0050] The total number of near ring zones 2 and far ring zones 3 is 3-20. The inner diameter of the concentric ring structure 10 is not less than 6 mm, and the outer diameter of the concentric ring structure 10 is not greater than 80 mm, and at the same time, the difference between the inner diameter and the outer diameter of the concentric ring structure 10 is 2-10 mm. The central far vision zone 4 has a diameter of 5-10 mm. The function lens needs to consider the pupil changes of the human eye under different brightness environments. Since the pupil diameter of ordinary people is about 6 mm, the central far vision zone 4 is set to have a diameter of 5-10 mm to ensure its imaging effect under normal brightness.

[0051] The diameter of the microstructure I 21 is 0.1-2 mm; the diameter of the microstructure II 31 is 0.1-2 mm. The microstructure I 21 and the microstructure II 31 used are both array microlenses and are arranged in a central symmetric manner relative to the lens body 1, and the refractive power of adjacent near ring zones 2 and adjacent far ring zones 3 changes linearly.

[0052] The refractive index and Abbe number of the lens body 1 satisfy the following conditions:

[0053] The refractive index is 1.67, and the Abbe number is greater than or equal to 30;

[0054] or the refractive index is 1.60, and the Abbe number is greater than or equal to 30;

[0055] or the refractive index is 1.55, and the Abbe number is greater than or equal to 30;

[0056] or the refractive index is 1.50, and the Abbe number is greater than or equal to 58.

[0057] The Abbe number is a parameter in the optical material that characterizes the dispersion, the higher the Abbe number, the smaller the dispersion; dispersion refers to the imaging position of light of different wavelengths, which causes unclear imaging, so the higher the Abbe number, the clearer the color image; high refractive index lenses can increase the surface curvature, that is, the lens is flatter, resulting in a thinner lens; therefore, the refractive index can affect the thickness and imaging quality of the lens, and the Abbe number also affects the imaging quality. Therefore, the refractive index and the Abbe number are limited to a relative range to obtain the best lens imaging effect.

[0058] In order to realize the correction of high hyperopia and strabismus, the lens body 1 is covered with a polarizing film 6 on the surface opposite to the surface where the concentric ring structure 10 is located, and the polarizing film 6 is further covered with a hard film 7 on the outside, and the polarizing film 6 at least completely covers the concentric ring structure 10. The polarizing film 6 used does not need to be notched on the lens body 1, but only needs to be coated on the lens body 1 to obtain the corresponding grating structure, which is adapted to the microstructure I 21 and the microstructure II 31 to promote ciliary muscle movement, and has good prevention and correction effect for hyperopia and strabismus.

[0059] In order to reduce the difficulty of film processing, the polarized film 6 comprises a main film body 60 and a secondary film body 61 which are attached to each other. The relatively independent main film body 60 and the secondary film body 61 can be adjusted according to the specifications of the concentric ring structure 10. The main film body 60 is arranged between the lens body 1 and the hard film 7. The secondary film body 61 is arranged between the lens body 1 and the main film body 60, or the secondary film body 61 is arranged between the hard film 7 and the main film body 60. The adjacent secondary film body 61 is independently arranged relative to the main film body 60. The lens body 1, the main film body 60, the secondary film body 61 and the hard film 7 are tightly attached at the contact position.

[0060] The secondary film body 61 is designed with a polarization area 611 and a light transmission area 612. The polarization area 611 is in the form of a circular ring and covers the hyperopia ring area 3 one by one. The light transmission area 612 is in the form of a circular ring and covers the myopia ring area 2 one by one. The transmittance of the polarization area 611 is 38%-42%, and the transmittance of the light transmission area 612 is 50%-64%. The polarization area 611 and the light transmission area 612 have different transmittances, thereby forming a grating without affecting the normal imaging of the retina.

[0061] The embodiment provides a manufacturing method of a partitioned hyperopia-myopia alternating function lens, which comprises the following steps:

[0062] S1: determining the size of the lens body 1 and the geometric center of the lens body 1, positioning the mold position by four points, and determining that the geometric center of the lens body 1 is consistent with the optical center;

[0063] S2: according to the lens design data, preparing a processing template, marking the lens center on the processing template, and performing edge grinding, angle grinding and polishing on the lens body 1;

[0064] S3: sequentially attaching the polarized film 6 and the hard film 7 to the lens body 1, and then performing secondary grinding processing on the edge of the transition area 5;

[0065] S4: performing secondary vacuum coating on the lens body 1, and coating silicon dioxide and zirconium dioxide with a designed thickness under vacuum conditions, so as to further improve the light transmission performance of the lens.

[0066] S4: slotting and drilling the edge of the lens body 1.

[0067] Embodiment 2:

[0068] The embodiment is based on the technical content of embodiment 1. The difference between the embodiment and embodiment 1 is that:

[0069] In the manufacturing method of the partitioned hyperopia-myopia alternating function lens, step S3 further comprises the following steps:

[0070] S31: determining the center axis points of the lens body 1 and the polarized film 6;

[0071] S32: cleaning the surface of the lens body 1;

[0072] S33: cutting the polarized film 6;

[0073] S34: attaching the polarized film 6 to the inner surface of the lens body 1;

[0074] S35: attaching the hard film 7 by soaking method.

[0075] Embodiment 3:

[0076] This embodiment is based on the technical content of Embodiment 2. The difference between this embodiment and Embodiment 2 is that:

[0077] In step S33, a fitting allowance of 1-2 mm is usually reserved for the myopia ring area 2 and the hyperopia ring area 3 during cutting.

[0078] In step S34, the polarized film 6 is attached, wherein the adjacent sub-film body 61 is arranged on both sides of the main film body 60. After the sub-film body 61 arranged at intervals is attached to the lens body 1, the main film body 60 is covered on the sub-film body 61 and the lens body 1, and then another group of sub-film bodies 61 is attached, and finally the attachment of the hard film 7 is completed.

[0079] Embodiment 4:

[0080] This embodiment is based on the technical content of Embodiment 2. The difference between this embodiment and Embodiment 2 is that:

[0081] In step S33, the polarization area 611 and the light transmission area 612 in the sub-film body 61 are integrated, and the transmittance at the junction of adjacent polarization area 611 and light transmission area 612 is linearly and smoothly transitioned.

[0082] In step S34, the sub-film body 61 is attached to the inner surface of the lens body 1 first, and then the main film body 60 is covered. The polarization area 611 and the light transmission area 612 of the sub-film body 61 are arranged on the same side of the lens body 1.

[0083] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

[0084] Although the terms lens body 1, polarizing film 6, hardening film 7, main film body 60, sub film body 61, polarizing area 611, light-transmitting area 612, concentric ring structure 10, myopic area, hyperopic area, transition area 5, etc. are used more frequently in this document, the possibility of using other terms is not excluded. These terms are used only for the purpose of more conveniently describing and explaining the essence of the present invention; any kind of interpretation of them as an additional limitation is contrary to the spirit of the present invention.

Claims

1. A zoned multifocal alternating function lens comprising a lens body (1), characterized in that: The lens body (1) is provided with a concentric ring structure (10) on the surface, the concentric ring structure (10) comprises a plurality of myopia ring areas (2) and hyperopia ring areas (3) arranged with the same center, the myopia ring areas (2) and the hyperopia ring areas (3) are arranged in cross-adjacent distribution from inside to outside, the curvature of the myopia ring areas (2) and the hyperopia ring areas (3) is different, the central region of the concentric ring structure (10) has a circular central hyperopia area (4), and the remaining region of the lens body (1) after removing the concentric ring structure (10) and the central hyperopia area (4) is a transition area (5); the myopia ring area (2) has a base I (20) and a microstructure I (21), the base I (20) of any myopia ring area (2) is increased by 1% in diopter relative to the base I (20) of the adjacent myopia ring area (2) on the inside, the microstructure I (21) is designed as a lenticule structure, the microstructure I (21) is designed as-1.0~-10.0D in diopter, and a plurality of microstructures I (21) are arrayed in the myopia ring area (2) and are centrally symmetric about the center of the concentric ring structure (10); the hyperopia ring area (3) has a base II (30) and a microstructure II (31), the base II (30) of any hyperopia ring area (3) is increased by 1% in diopter relative to the base II (30) of the adjacent hyperopia ring area (3) on the inside, the microstructure II (31) is designed as a lenticule structure, the microstructure II (31) is designed as +4.0~+10.0D in diopter, and a plurality of microstructures II (31) are arrayed in the hyperopia ring area (3) and are centrally symmetric about the center of the concentric ring structure (10); the lens body (1) is covered with a polarizing film (6) on the surface opposite to the surface where the concentric ring structure (10) is located, the outside of the polarizing film (6) is further covered with a hardening film (7), and the polarizing film (6) at least completely covers the concentric ring structure (10); the polarizing film (6) comprises a main film body (60) and a secondary film body (61) that are attached to each other, the main film body (60) is arranged between the lens body (1) and the hardening film (7); the secondary film body (61) is arranged between the lens body (1) and the main film body (60) or between the hardening film (7) and the main film body (60), and the lens body (1), the main film body (60), the secondary film body (61) and the hardening film (7) are tightly attached at the contact positions; the secondary film body (61) is designed with a polarization area (611) and a light transmission area (612), wherein the polarization area (611) is in the form of a circular ring and corresponds to the hyperopia ring area (3) one by one, the light transmission area (612) is in the form of a circular ring and corresponds to the myopia ring area (2) one by one, the transmittance of the polarization area (611) is 38%~42%, and the transmittance of the light transmission area (612) is 50%-64%.

2. The zoned alternativetopia function lens of claim 1, wherein: The total number of the nearsighted ring area (2) and the farsighted ring area (3) is 3-20; the inner diameter of the concentric ring structure (10) is not less than 6 mm, the outer diameter of the concentric ring structure (10) is not greater than 80 mm, and the difference between the inner diameter and the outer diameter of the concentric ring structure (10) is 2-10 mm; the diameter of the central farsighted area (4) is 5-10 mm.

3. The zoned alternativetopia function lens of claim 1, wherein: The diameter of the microstructure I (21) is 0.1-2 mm; the diameter of the microstructure II (31) is 0.1-2 mm.

4. The zoned alternativetopia function lens of claim 1, wherein: The refractive index and Abbe number of the lens body (1) satisfy the following conditions: The refractive index is 1.67, and the Abbe number is greater than or equal to 30; or the refractive index is 1.60, and the Abbe number is greater than or equal to 30; or the refractive index is 1.55, and the Abbe number is greater than or equal to 30; or the refractive index is 1.50, and the Abbe number is greater than or equal to 58. The method comprises the following steps: S1: determining the size of the lens body (1) and the geometric center of the lens body (1), positioning the mold position by four points, and determining that the geometric center of the lens body (1) is consistent with the optical center; S2: according to the lens design data, making a processing template, marking the lens center on the template, and performing edge grinding, angle grinding and polishing; 5. A manufacturing method of a zoned function lens for far and near vision, for manufacturing the zoned function lens for far and near vision according to any one of claims 1 to 4, characterized in that, S3: sequentially attaching the polarizing film (6) and the hardening film (7) to the lens body (1), and then performing secondary grinding treatment on the edge of the transition area (5); S4: performing secondary vacuum coating on the lens body (1), coating silicon dioxide and zirconium dioxide with a designed thickness under vacuum conditions, which can further improve the light transmission performance of the lens and improve the clarity of the lens. The step S3 comprises the following steps: S31: determining the center axis point of the lens body (1) and the polarizing film (6); S32: cleaning the surface of the lens body (1); 6. The method of manufacturing a segmented multifocal alternating function lens according to claim 5, wherein, S33: cutting the polarizing film (6); S34: attaching the polarizing film (6) to the inner surface of the lens body (1); S35: attaching the hardening film (7) by immersion method. ​ ​ ​

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