Dual-acting contrast defocus microlens sheet

Abstract

The utility model discloses a kind of double-effect contrast defocus microlens sheet, including substrate, the substrate both sides include outer side and inner side, the substrate includes by the curvatures of outer side and inner side jointly constituted refractive area of correcting vision;The outer side surface has regularly and uniformly distributed miniature convex lens, the center of the miniature convex lens is equipped with myopia refractive correction area;The inner side is processed into annular scattering area with scattering effect, the center of the annular scattering area is center visible area without scattering effect;The center of the myopia refractive correction area and center visible area coincides with the geometric center of substrate. Advantageous effect: the utility model can achieve the premise that lens basic visible effect, the function of two can control myopia degree deepening principle is stacked in the mode of double myopia prevention and control effect.

Description

Technical Field

[0001] This utility model relates to an eyeglass lens, and more particularly to a dual-contrast defocusing microlens, belonging to the field of eyeglass lens technology. Background Technology

[0002] High-contrast signals are closely related to the occurrence and development of myopia. In a high-contrast environment, the structure of opsins in cone cells changes, thereby interfering with the light signal transmission of cone cells, affecting the retina's regulation of eyeball growth, and increasing susceptibility to myopia.

[0003] Currently, with the widespread use of electronic products, most of the visual environment is in a high-contrast state. By reducing the contrast on the retina, the light signal difference of cone cells will be reduced, thereby reducing the structural changes of opsin in cone cells, slowing down the growth of the axial length to a certain extent, and thus slowing down the progression of myopia.

[0004] While reducing contrast can slow the progression of myopia, excessive reduction can cause visual deprivation and lead to a decline in visual function. Therefore, regulating the light intensity at the retina has become a pressing issue in the development of balanced contrast lenses. Simply using DOT technology to create a single scattering surface makes it difficult to further control retinal light intensity. Developing a superior method for controlling retinal light intensity is a crucial problem that needs to be solved in the production of balanced contrast lenses.

[0005] Similarly, because the human eye has a self-regulating mechanism for "seeing objects clearly," the retina can recognize defocus signals and send "growth" or "stop growth" signals to the sclera based on the defocus information, thereby controlling the rate of axial elongation. In myopia, the central retina exhibits myopic defocus, while the peripheral retina exhibits hyperopic defocus. This peripheral hyperopic defocus is the main reason for the continuous increase in myopia.

[0006] Defocus lenses for myopia can focus peripheral images onto or in front of the retina, thus cutting off the driving force for eyeball elongation and achieving the goal of controlling the progression of myopia.

[0007] In existing technologies, eyeglasses designed based on the theory of peripheral defocus myopia control all employ a partitioned structure. The center is designed as a zero-spherical-aberration optical zone for precise imaging, while the edges are designed as peripheral defocus control zones or astigmatism zones with a higher refractive power than the central area. However, existing defocus lenses have issues with the division of the defocus control zone, the magnitude of the defocus, and the ratio of the effective microlens to the defocus control zone. This results in a lack of strong intervention for myopia defocus within a 15-degree field of view from the fovea of ​​the retina, as well as an insufficient auxiliary intervention effect within a 15-degree to 20-degree field of view, directly impacting the myopia control effectiveness of defocus lenses.

[0008] Both controlling contrast and setting the number and defocus amount of microconvex lenses in defocused lenses can effectively control myopia. However, there are currently no dual-effect control lenses on the market that combine the two methods. Summary of the Invention

[0009] Purpose of the invention: The purpose of this utility model is to provide a dual-contrast defocusing microlens, which simultaneously controls myopia by adjusting the contrast and setting the parameters of the defocusing micro-convex lens.

[0010] Technical solution: A dual-contrast defocusing microlens includes a substrate with outer and inner surfaces on both sides. The substrate includes a refractive area for vision correction formed by the curved surfaces of the outer and inner surfaces. Micro-convex lenses are regularly distributed on the outer surface, and a myopia refractive correction area is provided at the center of each micro-convex lens. The inner surface is processed into a ring-shaped scattering area with a scattering effect, and the center of the ring-shaped scattering area is a central visible area without scattering effect. The centers of the myopia refractive correction area and the central visible area coincide with the geometric center of the substrate.

[0011] This invention utilizes regularly distributed defocused micro-convex lenses on the outer surface of a substrate to focus peripheral images onto or in front of the retina, thus interrupting the elongation of the eyeball and controlling the progression of myopia. Simultaneously, a ring-shaped scattering zone with a scattering effect is formed on the inner surface. By reducing contrast on the retina, this decreases the light signal difference between cone cells, thereby reducing changes in the opsin structure within the cone cells and slowing down axial elongation to some extent, thus mitigating myopia progression. The centers of both the myopia correction zone and the central visual zone coincide with the geometric center of the substrate, ensuring basic visibility. Ultimately, by achieving basic visibility while superimposing two functional layers that control myopia progression, a dual myopia control effect is achieved.

[0012] In a preferred embodiment, to control contrast, a hardening layer and an optical film layer are respectively provided on the outer and inner surfaces of the substrate. The hardening layer and the optical film layer are sequentially stacked on the front and back surfaces of the substrate from the inside out. The annular scattering region with a scattering effect is processed on the surface of the inner surface of the substrate and on the surfaces of the hardening layer and the optical film layer on the inner surface, with at least two surfaces having annular scattering regions with a scattering effect. The light intensity of the fundus can be adjusted through the annular scattering region, and the superposition of multiple annular scattering regions can further optimize the light intensity of the fundus.

[0013] In a preferred embodiment, in order to achieve the scattering effect, the annular scattering region 31 is composed of several scattering units with protrusions or depressions, the external dimensions of the scattering units are in the range of 0~1mm, and the interval between the scattering units is greater than 2mm.

[0014] The structure of the scattering cells can be dot-shaped, spherical, hemispherical, Gaussian, etc., with a size range of 0-1 mm. The scattering cells can be randomly, semi-randomly, or regularly distributed, with an interval greater than 2 mm. Due to the same-side stacking, the interval is greater than 2 mm to ensure visual effect. The scattering cells can be evenly or dynamically distributed, and can monotonically increase or decrease outwards from the lens center. The size of the scattering cells can be the same or different, and can monotonically increase or decrease outwards from the lens center.

[0015] In a preferred embodiment, the periphery of the myopia refractive correction zone is formed by microconvex lenses of different diopters, which extend from the optical center to the lens edge to constitute a strong intervention zone and an auxiliary buffer intervention zone, respectively; the diopters of the microconvex lenses in the strong intervention zone are greater than the diopters of the microconvex lenses in the auxiliary buffer intervention zone.

[0016] By distributing microconvex lenses of different diopters, the lens is divided into myopia refractive correction zones for correcting visual acuity, namely the central distance clear zone, the strong intervention zone, and the auxiliary buffer intervention zone. The strong intervention zone applies strong myopia defocus intervention within a 15-degree field of view from the fovea of ​​the retina, while the auxiliary buffer intervention zone provides auxiliary intervention within a 15- to 20-degree field of view from the fovea of ​​the retina, which can effectively control the progression of myopia.

[0017] In a preferred embodiment, to ensure clear and comfortable visual quality, the myopia refractive correction area is a circular region with a diameter of 9-10 mm.

[0018] Preferably, to achieve an effective defocusing effect, the diameter of the micro-convex lens is 0.8-1.6 mm, and the positive refractive power is +2.00D to +5.00D. If the diameter of the micro-convex lens is too small, the light transmission effect is not ideal, and the defocusing effect cannot be obtained; if the diameter of the micro-convex lens is large, especially larger than the pupil diameter, the large amount of light transmission will result in image skipping, producing a poor visual experience. Due to individual differences, the amount of defocusing is affected by the wearer's axial length, corneal curvature, and accommodation power, meaning the positive refractive power will be controlled between +2.00D and +5.00D to achieve the function of personalized myopia intervention.

[0019] Preferably, to ensure the effectiveness of defocus adjustment intervention, the sum of the projected areas of all micro-convex lenses in the strong intervention zone and the auxiliary buffer intervention zone accounts for 40%-60% of the sum of the projected areas of the strong intervention zone and the auxiliary buffer intervention zone. If the effective defocus area ratio is too small, it will affect the effect of adjustment intervention; if the area ratio is too large, it will affect wearing comfort. Therefore, experiments have shown that controlling the area ratio between 40% and 60% is more reasonable.

[0020] Preferably, to achieve a more effective intervention while facilitating lens manufacturing, the microconvex lenses in both the strong intervention zone and the auxiliary buffer intervention zone are arranged in concentric circles. While ensuring the intervention adjustment effect, and to facilitate lens design and manufacturing, the microconvex lenses are distributed on 13 concentric circles from the center to the lens edge; the microconvex lenses in the inner 1st to 4th circles constitute the strong intervention zone; the microconvex lenses in the 5th to 13th circles constitute the auxiliary buffer intervention zone; and the microconvex lenses on the same circle have the same refractive power.

[0021] To further reduce manufacturing difficulty, the distance between the edges of adjacent micro-convex lenses is greater than 0.2 mm. A distance that is too small between adjacent micro-convex lenses will increase manufacturing difficulty and affect lens quality.

[0022] Preferably, to further enhance the buffering effect of the auxiliary buffering intervention zone on discrete interventions, the auxiliary buffering intervention zone includes a first auxiliary buffering intervention zone and a second auxiliary buffering intervention zone, wherein the first auxiliary buffering intervention zone is located between the strong intervention zone and the second auxiliary buffering intervention zone; the refractive power of the micro-convex lens in the first auxiliary buffering intervention zone is greater than that in the second auxiliary buffering intervention zone. Furthermore, the auxiliary buffering intervention zone can be divided into more levels based on individual differences.

[0023] In a preferred embodiment, to ensure the effectiveness of the auxiliary buffer intervention zone in buffering discrete interventions, the micro-convex lenses in rings 5-8 constitute the first auxiliary buffer intervention zone, and the micro-convex lenses in rings 9-13 constitute the second auxiliary buffer intervention zone. Each level of the auxiliary buffer intervention zone needs to have a certain width to achieve the effect of buffering discrete interventions.

[0024] Beneficial Effects: This invention, by regularly and evenly distributing defocused micro-convex lenses on the outer surface of the substrate, allows peripheral imaging to occur above or in front of the retina, thus cutting off the driving force behind eyeball elongation and controlling the progression of myopia. Simultaneously, a ring-shaped scattering zone with a scattering effect is processed on the inner surface. By reducing contrast on the retina, this reduces the light signal difference between cone cells, thereby reducing changes in the opsin structure within the cone cells and slowing down axial growth to some extent, thus mitigating myopia progression. The centers of both the myopia refractive correction zone and the central visual zone coincide with the geometric center of the substrate, ensuring basic visibility of the lens. Ultimately, by achieving basic visibility while superimposing two functional layers that control the progression of myopia, a dual myopia control effect is achieved. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a cross-sectional view of the substrate of this utility model; Figure 2 This is a partial enlarged view of the miniature convex lens of this utility model; Figure 3 This is a schematic diagram of the inner surface of the present invention; Figure 4 This is a schematic diagram of the outer side of the present invention.

[0027] Figure 5 This is a schematic diagram showing the division of the microlens region on the outer side of the present invention. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] like Figure 1-4 As shown, a dual-contrast defocusing microlens includes a substrate 1. The substrate 1 has an outer surface 2 and an inner surface 3 on both sides. The substrate 1 includes a refractive area for vision correction formed by the curved surfaces of the outer surface 2 and the inner surface 3. Micro-convex lenses 4 are regularly distributed on the surface of the outer surface 2. The micro-convex lenses 4 have a myopia refractive correction area 5 at their center. The inner surface 3 is processed into a ring-shaped scattering area 31 with a scattering effect. The center of the ring-shaped scattering area 31 is a central visible area 32 without scattering effect. The centers of the myopia refractive correction area 5 and the central visible area 32 coincide with the geometric center of the substrate 1.

[0032] This invention utilizes regularly distributed defocused micro-convex lenses 4 on the outer surface 2 of the substrate 1 to project peripheral images onto or in front of the retina, thus interrupting the elongation of the eyeball and controlling the progression of myopia. Simultaneously, a ring-shaped scattering area 31 with a scattering effect is formed on the inner surface 3. By reducing contrast on the retina, this reduces the light signal difference between cone cells, thereby minimizing changes in the opsin structure within the cone cells and slowing down axial growth to some extent, thus reducing myopia progression. The centers of the myopia refractive correction area 5 and the central visual area 32 coincide with the geometric center of the substrate 1, ensuring basic visibility. Ultimately, by achieving basic visibility while superimposing two functional layers that control myopia progression, a dual myopia control effect is achieved.

[0033] To control contrast, the outer surface 2 and inner surface 3 of the substrate 1 are respectively provided with a hardening layer and an optical film layer. The hardening layer and the optical film layer are respectively stacked and processed on the front and back surfaces of the substrate from the inside out. The annular scattering region 31 with scattering effect is processed on the surface of the inner surface 3 of the substrate 1 and on the surface of the hardening layer 2 and the optical film layer 3 of the inner surface 3, with at least two surfaces having annular scattering region 31 with scattering effect. The light intensity of the fundus can be adjusted by the annular scattering region 31, and the superposition of multiple annular scattering regions 31 can further optimize the light intensity of the fundus.

[0034] To achieve the scattering effect, the annular scattering region 31 is composed of several scattering units with protrusions or depressions. The external dimensions of the scattering units range from 0 to 1 mm, and the interval between the scattering units is greater than 2 mm.

[0035] The structure of the scattering unit can be dot-shaped, spherical, hemispherical, Gaussian, etc. The size of the scattering unit ranges from 0 to 1 mm. The scattering units can be randomly distributed, semi-randomly distributed, or regularly distributed. Since they are superimposed on the same side, in order to ensure the visual effect, the spacing between the scattering units is greater than 2 mm. The scattering units can be evenly spaced, have variable spacing, or monotonically increase or decrease along the center of the lens outwards. The size of the scattering units can be the same or different, and can monotonically increase or decrease along the center of the lens outwards.

[0036] like Figure 4 and 5 As shown, the periphery of the myopia refractive correction zone 5 is formed by micro-convex lenses 4 of different refractive powers, which extend from the optical center to the edge of the lens to constitute a strong intervention zone 6 and an auxiliary buffer intervention zone 7, respectively; the refractive power of the micro-convex lenses 4 in the strong intervention zone 6 is greater than that of the micro-convex lenses 4 in the auxiliary buffer intervention zone 7.

[0037] By distributing micro-convex lenses 4 with different refractive powers, the lens is divided into myopia refractive correction zones 5 for correcting visual acuity, namely the central distance clear zone, the strong intervention zone 6, and the auxiliary buffer intervention zone 7. The strong intervention zone 6 applies strong myopia defocus intervention within a 15-degree field of view from the fovea of ​​the retina, while the auxiliary buffer intervention zone 7 provides auxiliary intervention within a 15- to 20-degree field of view from the fovea of ​​the retina, which can effectively control the increase of myopia.

[0038] In order to achieve the intervention effect more effectively and facilitate the processing of the lens, the micro convex lenses 4 in the strong intervention area 6 and the auxiliary buffer intervention area 7 are all arranged in concentric circles.

[0039] To further enhance the buffering effect of the auxiliary buffering intervention zone, the auxiliary buffering intervention zone 7 includes a first auxiliary buffering intervention zone 71 and a second auxiliary buffering intervention zone 72. The first auxiliary buffering intervention zone 71 is located between the strong intervention zone 6 and the second auxiliary buffering intervention zone 72. The diopter of the micro-convex lens 4 in the first auxiliary buffering intervention zone 71 is greater than that in the second auxiliary buffering intervention zone 72. While ensuring the buffering intervention effect, the auxiliary buffering intervention zone 7 can be further divided into more levels of auxiliary buffering intervention zones according to individual differences. Example 1

[0040] like Figure 4As shown, a dual-contrast defocusing microlens has a myopia correction zone 5 that is circular with a diameter of 9 mm; the diameter d of the micro-convex lens 4 is 1 mm; the micro-convex lenses 4 are distributed in 13 concentric circles from the center to the edge of the lens; the micro-convex lenses 4 in the first to fourth inner circles constitute a strong intervention zone 6; the micro-convex lenses 4 in the fifth to eighth inner circles constitute a first auxiliary buffer intervention zone 71; and the micro-convex lenses 4 in the ninth to thirteenth inner circles constitute a second auxiliary buffer intervention zone 72; the micro-convex lenses 4 on the same circle have the same refractive power; the positive refractive power of the strong intervention zone 6 is +3.50D, the positive refractive power of the first auxiliary buffer intervention zone 71 is +3.00D, and the positive refractive power of the second auxiliary buffer intervention zone 72 is +2.50D; the diameter difference between adjacent circles is 3 mm, and the distance between the edges of two adjacent micro-convex lenses 4 in the same circle is 0.2 mm; The combined projected area of ​​all micro-convex lenses 4 and the projected area of ​​the strong intervention zone 6 and the auxiliary buffer intervention zone 7 account for 44.5% of the total projected area. Example 2

[0041] A dual-contrast defocusing microlens is disclosed, wherein the myopia refractive correction zone 5 is a circular area with a diameter of 9 mm; the diameter d of the micro-convex lens 4 is 1 mm; the micro-convex lenses 4 are distributed in 13 concentric circles from the center to the edge of the lens; the micro-convex lenses 4 in the first to fourth inner circles constitute a strong intervention zone 6; the micro-convex lenses 4 in the fifth to eighth inner circles constitute a first auxiliary buffer intervention zone 71; and the micro-convex lenses 4 in the ninth to thirteenth inner circles constitute a second auxiliary buffer intervention zone 72; the micro-convex lenses 4 on the same circle have the same refractive power; the positive refractive power of the strong intervention zone 6 is +4.50D, the positive refractive power of the first auxiliary buffer intervention zone 71 is +4.00D, and the positive refractive power of the second auxiliary buffer intervention zone 72 is +3.50D; the diameter difference between adjacent circles is 2.4 mm, and the distance between the edges of two adjacent micro-convex lenses 4 in the same circle is 0.2 mm; The combined projected area of ​​all micro-convex lenses 4 and the projected area of ​​the strong intervention zone 6 and the auxiliary buffer intervention zone 7 account for 55.0% of the total area.

[0042] When the effective defocus area is too small, it will affect the effect of adjustment intervention; when the area is too large, it will affect wearing comfort. Therefore, under the premise that the production process can achieve this, experiments have shown that controlling the area ratio between 40% and 60% is more reasonable.

[0043] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-contrast defocusing microlens, comprising a substrate (1), wherein the substrate (1) has an outer surface (2) and an inner surface (3) on both sides, and the substrate (1) includes a refractive region for correcting visual acuity formed by the curved surfaces of the outer surface (2) and the inner surface (3); characterized in that: The outer surface (2) is regularly and evenly distributed with micro-convex lenses (4), and the micro-convex lenses (4) have a myopia refractive correction area (5) at their center; the inner surface (3) is processed into a ring scattering area (31) with a scattering effect, and the center of the ring scattering area (31) is a central visible area (32) without a scattering effect; the centers of the myopia refractive correction area (5) and the central visible area (32) coincide with the geometric center of the substrate (1).

2. The dual-contrast through-focus lenticular sheet according to claim 1, wherein: The outer side (2) and inner side (3) of the substrate (1) are respectively provided with a hardening layer and an optical film layer. The hardening layer and the optical film layer are respectively stacked and processed on the front and back sides of the substrate from the inside to the outside. The annular scattering region (31) with scattering effect is processed on the surface of the inner side (3) of the substrate (1) and the surface of the hardening layer and the optical film layer on the inner side (3). At least two surfaces are processed with annular scattering region (31) with scattering effect.

3. The dual-contrast through-focus lenticular sheet according to claim 1, wherein: The annular scattering region (31) is composed of several scattering units that are raised or recessed. The outer dimensions of the scattering units range from 0 to 1 mm, and the interval between the scattering units is greater than 2 mm.

4. The dual-contrast defocusing microlens sheet according to claim 1, characterized in that: The periphery of the myopia refractive correction zone (5) is formed by micro convex lenses (4) of different refractive powers from the optical center to the edge of the lens, which constitute a strong intervention zone (6) and an auxiliary buffer intervention zone (7); the refractive power of the micro convex lens (4) in the strong intervention zone (6) is greater than that of the micro convex lens (4) in the auxiliary buffer intervention zone (7).

5. The dual-contrast defocusing microlens sheet according to claim 4, characterized in that: The myopia refractive correction area (5) is a circular area with a diameter of 9-10 mm.

6. The dual-contrast through-focus lenticular sheet according to claim 4, wherein: The micro convex lens (4) has a diameter of 0.8-1.6 mm and a positive diopter of +2.00D to +5.00D.

7. The dual-contrast through-focus lenticular sheet according to claim 4, wherein: The sum of the projected areas of all the micro-convex lenses (4) in the strong intervention zone (6) and the auxiliary buffer intervention zone (7) accounts for 40%-60% of the sum of the projected areas of the strong intervention zone (6) and the auxiliary buffer intervention zone (7).

8. The dual-contrast through-focus lenticular sheet of claim 4, wherein: The micro-convex lenses (4) in the strong intervention zone (6) and the auxiliary buffer intervention zone (7) are all arranged in concentric circles; the micro-convex lenses (4) are distributed in 13 concentric circles from the center to the edge of the lens; the micro-convex lenses (4) in the first to fourth inner circles constitute the strong intervention zone (6); the micro-convex lenses (4) in the fifth to thirteenth inner circles constitute the auxiliary buffer intervention zone (7); the micro-convex lenses (4) on the same circle have the same refractive power.

9. The dual-contrast defocusing microlens sheet according to claim 8, characterized in that: The auxiliary buffer intervention area (7) includes a first auxiliary buffer intervention area (71) and a second auxiliary buffer intervention area (72). The first auxiliary buffer intervention area (71) is located between the strong intervention area (6) and the second auxiliary buffer intervention area (72). The refractive power of the micro convex lens (4) in the first auxiliary buffer intervention area (71) is greater than that of the micro convex lens (4) in the second auxiliary buffer intervention area (72).

10. The dual-contrast through-focus lenticular sheet according to claim 9, wherein: The micro-convex lenses (4) in the 5th to 8th rings constitute the first auxiliary buffer intervention zone (71), and the micro-convex lenses (4) in the 9th to 13th rings constitute the second auxiliary buffer intervention zone (72).

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