Myopia control contact lenses

Abstract

The invention provides a shortsightedness control contact lens. The shortsightedness control contact lens comprises a central correction area, a regulation and control area and a defocusing area, the central correction region provides a predetermined diopter. The adjusting and regulating area surrounds the central correction area, the adjusting and regulating area has N times of spherical aberration changes in the radial direction to present first diopter distribution, and N is a positive integer. The defocusing area surrounds the adjusting and regulating area, and the defocusing area presents second diopter distribution along the radial direction. Wherein the maximum diopter of the second diopter distribution is the sum of the predetermined diopter and the defocus variable, the defocus variable satisfies the following formula: Y = a * X2 + b * X + c, X is the predetermined diopter, Y is the defocus variable, a is a first coefficient, b is a second coefficient, c is a constant, a is between 0 and 5, b is between 0 and 5, and c is between 0.5 and 15.

Description

Technical Field

[0001] This invention relates to a contact lens, and more particularly to a myopia control contact lens. Background Technology

[0002] The primary function of contact lenses is the same as that of traditional eyeglasses: vision correction, including correction of myopia, hyperopia, astigmatism, presbyopia, and aberrations. With advancements in medical and optometry technologies, contact lenses with various functions are constantly being developed and innovated. Among them, myopia control contact lenses are optical tools specifically designed to slow the progression of myopia.

[0003] Myopia control contact lenses can achieve their effect in several ways. For example, orthokeratology lenses, a type of rigid contact lens, correct vision by changing the shape of the cornea and are usually worn at night. Another type is daytime soft contact lenses, which have a special optical design that increases peripheral defocus while preserving central vision, thereby controlling the progression of myopia.

[0004] However, existing myopia control contact lenses often suffer from poor visual quality due to central correction deviations (e.g., central undercorrection). Furthermore, current myopia control lens designs typically increase accommodative lag, fail to reduce the increased accommodative micro-fluctuations that occur with myopia progression, and result in peripheral hyperopic defocus on the nasal periphery even after correction. All of these issues contribute to the inability to effectively control myopia progression.

[0005] Therefore, there is a need for a myopia control contact lens that can overcome the above problems and effectively control the progression of myopia. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a myopia control contact lens that can effectively control the progression of myopia, addressing the shortcomings of the prior art.

[0007] To address the aforementioned technical problems, one technical solution adopted by this invention is to provide a myopia control contact lens, comprising: a central correction zone providing a predetermined refractive power; an accommodative control zone surrounding the central correction zone, the accommodative control zone exhibiting a first refractive power distribution with N spherical aberration changes in a radial direction, where N is a positive integer; and a defocus zone surrounding the accommodative control zone, the defocus zone exhibiting a second refractive power distribution along the radial direction, wherein the maximum refractive power of the second refractive power distribution is the predetermined refractive power plus a defocus variable, the defocus variable satisfying the following formula: Y=a*X 2+b*X+c, where X is the predetermined diopter, Y is the defocus variable, a is a first coefficient, b is a second coefficient, and c is a constant, where a is between 0 and 5, b is between 0 and 5, and c is between 0.5 and 15.

[0008] Optionally, all refractive powers in the first refractive power distribution are greater than the predetermined refractive power.

[0009] Optionally, the first refractive power distribution has regional maxima and regional minima, the total of which is M, where M is an integer, and when N is odd, M equals N minus 1, and when N is even, M equals N, and the refractive power in each of the regional maxima regions is greater than the refractive power in the two adjacent regional minima regions.

[0010] Optionally, the second diopter distribution sequentially includes a diopter-increasing region and a diopter-decreasing region along the radial direction.

[0011] Optionally, the maximum change in the Nth spherical aberration change of the adjustment and control area is between a first predetermined magnification of the defocus variable, wherein the first predetermined magnification is between 0.01 and 0.9.

[0012] Optionally, the central correction zone is located within a first radius, the adjustment and control zone is located within the first radius and a second radius, and the defocus zone is located within the second radius and a third radius.

[0013] Optionally, the first radius ranges from 0 mm to 0.5 mm.

[0014] Optionally, the second radius range includes the first radius range and a second outer diameter range, wherein the second outer diameter range is between 0.5 mm and 2 mm.

[0015] Optionally, the third radius range includes the second radius range and a third outer diameter range, wherein the third outer diameter range is greater than 2 mm.

[0016] Optionally, the refractive power of the central correction zone, the adjustment and control zone, and the defocus zone varies continuously.

[0017] One of the beneficial effects of this invention is that the myopia control contact lens provided by this invention achieves complete correction in the central correction zone, thereby improving visual quality. Furthermore, by configuring at least one spherical aberration change in the accommodation control zone, accommodative lag and micro-fluctuations in accommodation can be reduced. On the other hand, in the defocus zone, by designing additional focal power according to the myopia degree of the eye to be corrected, the myopia shift in the peripheral retina can be increased, thereby achieving full retinal myopia defocus. Through the above configuration, the myopia control contact lens provided by this invention can effectively inhibit the progression of myopia.

[0018] To further understand the features and technical content of this application, please refer to the following detailed description and drawings. However, the drawings provided are for reference and illustration only and are not intended to limit this application. Attached Figure Description

[0019] Figure 1 This is a top view schematic diagram of a myopia control contact lens according to an embodiment of the present invention.

[0020] Figure 2 This is a perspective view of a myopia control contact lens according to an embodiment of the present invention.

[0021] Figure 3 For along Figure 1 A cross-sectional view diagram taken by section line AA.

[0022] Figure 4 The refractive power distribution map of the myopia control contact lens according to an embodiment of the present invention is based on first-order spherical aberration.

[0023] Figure 5 The myopia control contact lens of one embodiment of the present invention uses a refractive power distribution map with two spherical aberrations.

[0024] Figure 6 The refractive power distribution diagram of the myopia control contact lens according to an embodiment of the present invention is based on fourth-order spherical aberration.

[0025] Figure 7 This is a graph of the defocus variable versus a predetermined refractive power according to an embodiment of the present invention. Detailed Implementation

[0026] The following specific examples illustrate the embodiments of the "myopia control contact lenses" disclosed in this application. Those skilled in the art can understand the advantages and effects of this application from the content disclosed in this specification. This application can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this application. Furthermore, the accompanying drawings are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this application in detail, but the disclosed content is not intended to limit the scope of protection of this application. Additionally, the term "or" used herein may include, depending on the actual situation, any combination of any one or more of the associated listed items.

[0027] Figure 1 This is a top view schematic diagram of a myopia control contact lens according to an embodiment of the present invention. Figure 2 This is a perspective view of a myopia control contact lens according to an embodiment of the present invention. Figure 3 For along Figure 1 A cross-sectional view diagram taken by section line AA.

[0028] See Figures 1 to 3 As shown, this embodiment of the invention provides a myopia control contact lens 10, which includes a central correction zone A1, an accommodation control zone A2, and a defocus zone A3. The myopia control contact lens 10 may be made of, for example, hydrogel or silicone hydrogel, having high water content and good oxygen permeability, making it suitable for long-term wear.

[0029] like Figure 1 As shown, in the myopia control contact lens 10, the central correction area A1 has a generally circular shape, and the accommodation control area A2 and the defocus area A3 each have a generally annular shape. The central correction area A1 may be located within a first radius range R1, the accommodation control area A2 may be located within the first radius range R1 and the second radius range R2, and the defocus area A3 may be located within the second radius range and the third radius range R3. The second radius range R2 may include the first radius range R1 and the second outer diameter range r2, and the third radius range R3 may include the second radius range R2 and the third outer diameter range r3. The first radius range R1, the second outer diameter range r2, and the third outer diameter range r3 are continuously distributed along the radial direction Dr. In some embodiments of the present invention, the first radius range R1 is, for example, between 0 and 0.5 mm, the second outer diameter range r2 is, for example, between 0.5 and 2 mm, and the third outer diameter range r3 is greater than 2 mm.

[0030] For example, such as Figure 1 , Figure 3 As shown, the central correction zone A1 is a circular area formed by taking the center of the myopia control contact lens 10 as a virtual central optical axis C, and surrounding the virtual central optical axis C. The accommodation control zone A2 is an annular area formed by surrounding this circular area (central correction zone A1) with the virtual central optical axis C as the center. Similarly, the defocus zone A3 is another annular area formed by surrounding this annular area (accommodation control zone A2) with the virtual central optical axis C as the center. The total diameter of the myopia control contact lens 10 can be between 13.0 mm and 15.0 mm (i.e., the radius is between 6.5 mm and 7.5 mm), however, the present invention is not limited thereto.

[0031] Furthermore, in this embodiment, the lens body of the myopia control contact lens 10 has an anterior curve 100 and a base curve 102. For example, it can be an optical system composed of an anterior curve 100 with a single curvature and a base curve 102 that is aspherical, or an optical system composed of both an anterior curve 100 and a base curve 102 that are aspherical. This invention is not limited to these limitations. It should be noted that the details of the myopia control contact lens 10 provided in this embodiment are presented in detail below by describing the refractive power distribution. Those skilled in the art can determine various manufacturing parameters of the contact lens based on the refractive power distribution disclosed in this invention, such as the curvature radius distribution of the anterior curve 100 and the base curve 102, and the lens thickness to be used when using materials with different refractive indices, thereby manufacturing a myopia control contact lens with the refractive power distribution disclosed in this invention. Since the method of manufacturing contact lenses based on the refractive power distribution is well known to those skilled in the art, it will not be described in detail here.

[0032] The central correction zone A1 has a predetermined refractive power for correcting the myopia of the eye to be controlled. Specifically, within the central correction zone A1, the predetermined refractive power is the same as the refractive power corresponding to the myopia of the eye to be controlled, resulting in complete correction. The refractive power changes continuously when moving from the central correction zone A1 to the accommodation control zone A2. Because the central correction zone A1 achieves complete correction at the center of the myopia control contact lens 10, visual quality is improved.

[0033] The accommodative control zone A2 surrounds the central correction zone A1. In this embodiment, the accommodative control zone A2 is used to adjust the degree of accommodative lag in the eye to be controlled and reduce changes in accommodative micro-fluctuations. Generally, the performance of the myopia control contact lens 10 can be evaluated by measuring the accommodative response and accommodative micro-fluctuations of the eye after correction. The accommodative response reflects the relationship between the accommodative response amount and the accommodative stimulus amount. If the response amount is less than the stimulus amount, it is called accommodative lag, indicating insufficient accommodation; if the response amount is greater than the stimulus amount, it is called accommodative lead, indicating excessive accommodation. In addition, accommodative micro-fluctuations are tremors or instability caused by ciliary muscle spasm when viewing near targets. Unstable accommodative micro-fluctuations can accumulate hyperopic defocus signals or produce blurred images on the retina, leading to relative visual form deprivation, thereby inducing myopia and accelerating myopia progression. Clinically, excessive accommodative lag and accommodative micro-fluctuations can promote axial growth of the eyeball, leading to increased myopia.

[0034] To reduce accommodative hysteresis and micro-fluctuations in accommodation, this invention designs the accommodation control zone A2 to exhibit a first refractive power distribution with N spherical aberration variations along the radial direction Dr. All refractive powers in this first refractive power distribution are greater than a predetermined refractive power, and N is a positive integer. More specifically, N spherical aberration variations refer to the first refractive power distribution along the radial direction Dr in the accommodation control zone A2 having regional maxima and regional minima, totaling M, where M is an integer. When N is odd, M equals N minus 1; when N is even, M equals N. The number of regional maxima is M / 2, and the refractive power in each of these maxima regions is greater than the refractive power in the two adjacent regional minima regions. The number of regional minima is M minus the number of regional maxima. Based on these rules, myopia control contact lenses 10 with different spherical aberration variations can be designed.

[0035] Figure 4 , Figure 5 and Figure 6 The images show the refractive power distribution diagrams of a myopia control contact lens according to an embodiment of the present invention, using first-order spherical aberration, second-order spherical aberration, and fourth-order spherical aberration.

[0036] from Figure 4 It can be seen that when the myopia is -1D, within the central correction zone A1 with a radius of 0mm to 0.5mm, the predetermined refractive power is the same as the refractive power corresponding to the myopia, which is a complete correction. More specifically, when the myopia control contact lens 10 uses the accommodation control zone A2 with primary spherical aberration, the first refractive power distribution varying along the radial direction Dr does not have a regional maximum or minimum value region. Instead, it starts from the edge of the central correction zone A1 (with a radius of approximately 0.5mm) and gradually increases to the edge of the defocus zone A3 (with a radius of approximately 2mm). Furthermore, in the first refractive power distribution, all refractive power values ​​are greater than the predetermined refractive power.

[0037] However, as Figure 5 As shown, when the myopia control contact lens 10 uses the accommodation control area A2 with secondary spherical aberration, the first refractive power distribution varying along the radial direction Dr has a regional maximum and a regional minimum. It gradually increases from the edge of the central correction area A1 to the maximum value in the first regional maximum, then gradually decreases to the minimum value in the second regional minimum, and finally gradually increases to the edge of the defocus area A3. Figure 5In the first refractive power distribution, all refractive power values ​​are greater than the predetermined refractive power. Furthermore, in the radial direction Dr, the first region of the first refractive power distribution is a regional maximum region, and the maximum refractive power value in each regional maximum region is greater than the minimum refractive power values ​​in the two adjacent regional minimum regions in the radial direction Dr. Therefore, the first refractive power distribution exhibits an S-shaped pattern of continuous change sloping towards the positive refractive power range.

[0038] like Figure 6 As shown, when the myopia control contact lens 10 uses the accommodative control zone A2 with fourth-order spherical aberration, the first refractive power distribution varying along the radial direction Dr has two regional maxima and two regional minima. Starting from the edge of the central correction zone A1, it gradually increases to the maximum value in the first regional maxima, then gradually decreases to the minimum value in the first regional minima, then gradually increases to the maximum value in the second regional maxima, then gradually decreases to the minimum value in the second regional minima, and finally gradually increases to the edge of the defocus zone A3. Figure 6 In the first refractive power distribution, all refractive power values ​​are greater than the predetermined refractive power. Furthermore, in the radial direction Dr, the first region of the first refractive power distribution is a regional maximum region, and multiple regional maximum regions and multiple regional minimum regions are arranged alternately. The maximum refractive power value in each regional maximum region is greater than the minimum refractive power values ​​in the two adjacent regional minimum regions in the radial direction Dr. Therefore, the first refractive power distribution exhibits two consecutive S-shaped patterns sloping towards the positive refractive power range.

[0039] It can be envisioned that when the myopia control contact lens 10 uses an accommodation control area A2 with sixth-order spherical aberration, the first refractive power distribution varying along the radial direction Dr has three regional maxima and three regional minima. When the myopia control contact lens 10 uses an accommodation control area A2 with eighth-order spherical aberration, the first refractive power distribution varying along the radial direction Dr has four regional maxima and four regional minima.

[0040] It should be noted that, in this embodiment, the maximum change in spherical aberration of N times in the adjustment and control area A2 (the maximum amplitude used with a predetermined refractive power as a reference) is limited by the refractive power distribution of the defocus area A3, as detailed below.

[0041] like Figure 1 As shown, the defocusing area A3 surrounds the adjustment and control area A2, and as mentioned above, the defocusing area A3 is located within the third outer diameter range r3, exhibiting a second diopter distribution along the radial direction Dr.

[0042] In embodiments of the present invention, the defocus zone A3 is primarily used to adjust the defocus characteristics of the eye to be controlled to a myopic defocus state. Specifically, peripheral defocus describes the defocus state presented on the peripheral retina after refractive correction, measured in Diopter (D). In existing myopia control contact lenses, clinical testing often focuses only on adjusting the temporal peripheral retina to a myopic defocus state, neglecting the asymmetry of the nasotemporal retina. Due to insufficient nasal peripheral myopic defocus effect, hyperopic defocus still occurs on the nasal retina after correction.

[0043] Therefore, this invention calculates the required peripheral defocus amount for each degree of myopia in the defocus zone A3 based on clinical results, aiming to achieve peripheral myopia defocus on both the nasotemporal retina and the periphery. Based on this, the defocus zone A3 of the myopia control contact lens 10 is designed such that the second refractive power distribution of the defocus zone A3 is the predetermined refractive power used for complete correction in the central correction zone A1 plus the defocus variable. The defocus variable satisfies the following formula:

[0044] Y=a*X 2 +b*X+c;

[0045] Where X is the predetermined diopter, Y is the defocus variable, a is a first coefficient, b is a second coefficient, and c is a constant, where a is between 0 and 5, b is between 0 and 5, and c is between 0.5 and 15.

[0046] In a preferred embodiment of the present invention, a and b are between 0.05 and 0.2, and c is between 0.5 and 10. More preferably, a is between 0.08 and 0.17, b is between 0.08 and 0.17, and c is between 1 and 8.

[0047] Figure 7 This is a graph showing the defocus variable versus a predetermined refractive power according to an embodiment of the present invention. Please refer to... Figure 7 Based on the boundary conditions described above, we can obtain Y = 0.08 * X. 2 +0.08*X+1 and Y=0.17*X 2 The two sets of relationships are +0.17*X+8. Therefore, from the range limited by these two relationships, it can be seen that in the defocus zone A3, the defocus variable can be adjusted according to different myopia degrees. In the range of myopia degrees from 0 to -12D, the defocus variable can be adjusted to a range of approximately 1 to 30 times the predetermined refractive power.

[0048] Furthermore, the second refractive power distribution, along the radial direction Dr, sequentially includes a refractive power increasing region and a refractive power decreasing region, with the increasing and decreasing regions separated by the maximum refractive power of the region. This maximum refractive power is represented by the refractive power difference between itself and a predetermined refractive power, and can be used to set the maximum change in the Nth order of spherical aberration changes in the adjustment control area A2, as well as all refractive power values ​​in the first refractive power distribution. In this embodiment, based on clinical trial results, the maximum change in the Nth order of spherical aberration changes is within a first predetermined magnification of the defocus variable. In a preferred embodiment, the first predetermined magnification may be within the range of 0.01 to 0.9 times; more preferably, the first predetermined magnification is within the range of 0.01 to 0.5 times. Furthermore, all refractive power values ​​in the first refractive power distribution are less than the maximum refractive power of the region.

[0049] Therefore, as Figure 4 As shown, when the curve is Y=0.08*X 2 When +0.08*X+1, the defocus variable corresponding to myopia -1D is 1, and the maximum refractive power is 0. When the radius is 0mm, the corresponding predetermined refractive power is approximately -1D. As the distance from the virtual central optical axis C increases, the refractive power gradually increases. Therefore, based on the predetermined refractive power, the maximum change in spherical aberration in the adjustment control area A2 is 0.2, which is 0.2 times the defocus variable. This position is in the first predetermined magnification, that is, in the range of 0.01 to 0.9.

[0050] Therefore, as Figure 5 As shown, the refractive power values ​​of the central correction zone A1, the accommodation and control zone A2, and the defocus zone A3 change continuously. Furthermore, the second refractive power distribution, along the radial direction Dr, sequentially includes increasing and decreasing refractive power zones, with the minimum refractive power of each zone as the dividing point. For example, when the curve is Y=0.17*X... 2 When +0.17*X+8, the defocus variable corresponding to myopia -11D is 26.7, and the maximum refractive power is approximately 15.7. When the radius is 0mm, the corresponding predetermined refractive power is approximately -11D. As the distance from the virtual central optical axis C increases, the refractive power gradually increases. Therefore, based on the predetermined refractive power, the maximum change in spherical aberration in the accommodation control area A2 is 2.67, which is 0.1 times the maximum refractive power. This is located at the first predetermined magnification, i.e., within the range of 0.01 to 0.9.

[0051] Please refer to Table 1 below, which reveals... Figure 7 The curve is Y=0.17*X 2 +0.17*X+8 represents the maximum refractive power and the maximum change in spherical aberrations corresponding to different predetermined refractive powers.

[0052]

[0053] Figure 6 In another preferred embodiment of the present invention, the refractive power values ​​of the central correction zone A1, the accommodation control zone A2, and the defocus zone A3 change continuously. Furthermore, the second refractive power distribution sequentially includes refractive power increasing and decreasing zones along the radial direction Dr, with the minimum refractive power of the region as the dividing point. For example, the defocus variable corresponding to myopia -5D is 6.4, and the maximum refractive power is approximately 1.4. At a radius of 0mm, the corresponding predetermined refractive power is approximately -5D. As the distance from the virtual central optical axis C increases, the refractive power gradually increases. Therefore, based on the predetermined refractive power, the maximum change in spherical aberration in the accommodation control zone A2 is approximately 0.96, approximately 0.15 times the defocus variable. This is within the first predetermined magnification, i.e., the range of 0.01 to 0.9.

[0054] It should be noted that, in terms of accommodative ability, the myopia control contact lens of this invention provides superior accommodative ability to the corrected eye compared to existing myopia control contact lenses. Specifically, in an accommodative ability experiment, subjects wore both the myopia control contact lens of this invention and existing myopia control lenses, respectively, and the degree of accommodative lag was tested under three different accommodation demands. The experimental results show that the myopia control contact lens of this invention has a lower accommodative lag than existing myopia control lenses under the same conditions. In other words, the eye corrected by the myopia control contact lens of this invention has superior accommodative ability, offering advantages in myopia control.

[0055] Besides the accommodative response, the myopia control contact lenses of this invention exhibit significantly lower accommodative micro-fluctuation compared to existing myopia control contact lenses. Specifically, in an accommodative micro-fluctuation experiment, subjects wore both the myopia control lenses of this invention and those of the prior art, and accommodative micro-fluctuations of the eye were measured under seven different test conditions. The experimental results showed that the accommodative micro-fluctuation values ​​of the existing myopia control lenses ranged from 60 to 75 under each condition, while the corresponding test values ​​of the myopia control lenses of this invention were all lower than those of the existing myopia control lenses. These test results indicate that the myopia control lenses of this invention have smaller accommodative micro-fluctuations, meaning they exhibit higher dynamic accommodative stability.

[0056] Therefore, after myopia control contact lenses of this invention are used for correction, the eye can achieve more stable and continuous focusing on the central retina when adjusting the focal length, reducing blurred images on the retina. Thus, clinically, myopia control contact lenses of this invention can slow down axial growth of the eyeball, effectively preventing further myopia progression.

[0057] Furthermore, experiments revealed that both the myopia control contact lenses of this invention and existing myopia control contact lenses can adjust the peripheral temporal retina (the range where the retinal eccentricity is greater than 0 degrees) to a myopic defocus state. However, because existing myopia control contact lenses are not designed for nasotemporal retinal asymmetry, the myopic defocus effect in the nasal peripheral area (the range where the retinal eccentricity is less than 0 degrees) is insufficient, resulting in hyperopic defocus on the nasal retina after correction. This hyperopic defocus causes the image focus to fall behind the retina around the macula, which will cause the axial length of the eye to elongate, thereby exacerbating myopia.

[0058] The myopia control contact lens of this invention is designed for cases of nasotemporal retinal asymmetry. After correction, it can also achieve hyperopic defocus in the peripheral nasal region (the range where the retinal eccentricity is less than 0 degrees). Therefore, by positioning the imaging focus in front of the retina around the macula, it can effectively inhibit the elongation of the eye axis and achieve the effect of controlling myopia.

[0059] Beneficial effects of the embodiments

[0060] One of the beneficial effects of this invention is that the myopia control contact lens provided by this invention achieves complete correction in the central correction zone, thereby improving visual quality. Furthermore, by configuring at least one spherical aberration change in the accommodation control zone, accommodative hysteresis and micro-fluctuations in accommodation can be reduced. On the other hand, in the defocus zone, by designing a defocus variable based on the degree of myopia in the eye to be corrected, the myopia shift in the peripheral retina can be increased, thereby achieving full retinal myopia defocus. Through the above configuration, the myopia control contact lens provided by this invention can effectively inhibit the progression of myopia.

[0061] The content disclosed above is only a preferred and feasible embodiment of this application, and is not intended to limit the scope of protection of the claims of this application. Therefore, all equivalent technical changes made based on the content of this application specification and drawings are included within the scope of protection of the claims of this application.

Claims

1. A myopia control contact lens, characterized in that, The myopia control contact lenses include: A central correction zone provides a predetermined refractive power; An adjustment and control area surrounds the central correction area. The adjustment and control area has N spherical aberration changes in a radial direction to present a first diopter distribution, where N is a positive integer. A defocused area surrounds the adjustment and control area, and the defocused area exhibits a second refractive power distribution along the radial direction. Wherein, the maximum refractive power of the second refractive power distribution is the predetermined refractive power plus a defocus variable, and the defocus variable satisfies the following formula: Y=a*X 2 +b*X+c, Where X is the predetermined diopter, Y is the defocus variable, a is a first coefficient, b is a second coefficient, and c is a constant, where a is between 0 and 5, b is between 0 and 5, and c is between 0.5 and 15.

2. The myopia control contact lens according to claim 1, characterized in that, All refractive errors in the first refractive error distribution are greater than the predetermined refractive error.

3. The myopia control contact lens according to claim 1, characterized in that, The first refractive power distribution has regional maxima and regional minima, the total number of regional maxima and regional minima is M, M is an integer, and when N is odd, M equals N minus 1, when N is even, M equals N, and the refractive power in each of the regional maxima regions is greater than the refractive power in the two adjacent regional minima regions.

4. The myopia control contact lens according to claim 1, characterized in that, The second refractive power distribution sequentially includes a refractive power increasing region and a refractive power decreasing region along the radial direction.

5. The myopia control contact lens according to claim 1, characterized in that, The maximum change of the Nth spherical aberration change in the adjustment and control area is between a first predetermined magnification of the defocus variable, where the first predetermined magnification is between 0.01 and 0.

9.

6. The myopia control contact lens according to claim 1, characterized in that, The central correction zone is located within a first radius, the adjustment and control zone is located within the first radius and a second radius, and the defocus zone is located within the second radius and a third radius.

7. The myopia control contact lens according to claim 6, characterized in that, The first radius ranges from 0 mm to 0.5 mm.

8. The myopia control contact lens according to claim 6, characterized in that, The second radius range includes the first radius range and a second outer diameter range, the second outer diameter range being between 0.5 mm and 2 mm.

9. The myopia control contact lens according to claim 6, characterized in that, The third radius range includes the second radius range and a third outer diameter range, wherein the third outer diameter range is greater than 2 mm.

10. The myopia control contact lens according to claim 1, characterized in that, The refractive power of the central correction zone, the adjustment and control zone, and the defocus zone changes continuously.

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