Myopia control contact lens

Abstract

The application provides a myopia control contact lens, comprising a lens body, wherein a dioptric correction area is arranged on the lens body, a central clear area is arranged in the middle of the dioptric correction area, a central enhancement induction area is arranged in the middle of the central clear area, a plurality of point diffusion areas and at least one focal ring with a defocus amount distribution are arranged on the periphery of the central clear area. According to the application, the focal ring and the central enhancement induction area form a point focal ring in front of the retina, and the influence on visual acuity is minimal when the myopia control adjustment is normally carried out through optical defocus; and while the myopia control is carried out through defocus, the point diffusion area can change the scattering of light, thereby reducing the contrast of image imaging, the lens adjusts the contrast and the visual signal of optical defocus through the defocus area and the point diffusion area to delay the increase of the axial length, thereby achieving a better myopia control effect.

Description

Technical Field

[0001] This invention relates to the field of contact lens technology, and in particular to a myopia control contact lens. Background Technology

[0002] Common conditions leading to decreased visual acuity are myopia and hyperopia, which require corrective lenses in the form of glasses or rigid or soft contact lenses. These conditions are generally described as an imbalance between the length of the eye and the focusing ability of the eye's optical components. Myopic eyes focus in front of the retinal plane, while hyperopic eyes focus behind the retinal plane. Myopia typically develops because the axial length of the eye grows longer than the focal length of the eye's optical components—that is, the eye becomes too long. Hyperopia typically develops because the axial length of the eye is too short compared to the focal length of the eye's optical components—that is, the eye does not grow long enough.

[0003] Research has found that the visual signal-dependent mechanism of refractive development originates within the eye. The main visual signals affecting the intraocular emmetropization process include contrast and optical defocus. These two visual signals converge on a common channel after passing through the retina, namely, transmission through the retinal pigment epithelium. In the choroid, contrast and optical defocus signals alter the thickness of the choroid, ultimately affecting the refractive power. In other words, optical defocus can influence the emmetropization process by affecting the position of the retinal image, while contrast can also adjust the overall image contrast to influence the emmetropization process. The emmetropization process is the process of myopia control. In other words, in addition to the distance of objects viewed (optical defocus), the general factors causing myopia also include the contrast of the image. For example, looking at a mobile phone in a dark environment is more likely to cause myopia.

[0004] In existing technologies, the main visual signals for myopia control in contact lenses are generally achieved by changing the amount and distribution of defocus on the lens. However, increasing the amount of defocus can only adjust the optical defocus visual signal, but cannot change the contrast visual signal to affect the emmetropization process. Furthermore, typical defocus lenses usually form a point focal point in front of the retina, which can affect visual acuity to some extent.

[0005] Therefore, existing defocused contact lenses do not provide comprehensive myopia control, resulting in a lower overall effectiveness in myopia control. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the myopia control contact lens provided by the present invention forms a focal ring in front of the retina and adjusts the emmetropization process by adjusting the visual signals of contrast and optical defocus. This ensures that the amount of defocus is increased while minimizing the impact on visual acuity and achieves better myopia control effect.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A myopia control contact lens includes a lens body, on which a refractive correction zone is provided, a clear vision zone is provided in the center of the refractive correction zone, a central enhancement sensing zone for transmitting myopia control visual signals to the retina is provided in the center of the clear vision zone, and a plurality of dot diffusion zones for significantly altering light scattering and at least one focal ring with defocus distribution are provided on the periphery of the clear vision zone.

[0009] Furthermore, the central enhanced high defocus zone includes several defocus reaction zones of different thicknesses.

[0010] Furthermore, the central enhanced high-point diffusion region includes a first scattering cavity and a first smooth layer disposed on top of the first scattering cavity, wherein a first concave-convex structure for changing light scattering is disposed within the first scattering cavity.

[0011] Furthermore, the point diffusion region includes a second scattering cavity and a second smooth layer disposed on top of the second scattering cavity. The second scattering cavity is provided with a second concave-convex structure for changing light scattering, and the degree of undulation of the second concave-convex structure is greater than the degree of undulation of the first concave-convex structure.

[0012] Furthermore, the central enhancement sensing area is either a central enhancement high defocus area with a defocus amount distribution or a central enhancement high point diffusion area used to change light scattering.

[0013] Furthermore, the central enhanced sensing area is located in the central enhanced high defocus area, and the refractive power of the central enhanced high defocus area is greater than the refractive power of the photopic area.

[0014] Furthermore, the focal ring is provided with a plurality of defocus zones in the inner circumferential direction, and the defocus amount of the central enhanced high defocus zone is greater than the defocus amount of any defocus zone in the focal ring.

[0015] Furthermore, the defocusing amount of each of the defocused regions is different, and the surface area of ​​each of the point diffusion regions is different.

[0016] Furthermore, the dot diffusion region is circumferentially distributed with the defocused region as the center.

[0017] Furthermore, in the radial direction, the defocusing amount of the defocused areas within the same radius range is different.

[0018] Compared to existing technologies, the myopia control contact lens provided by this invention includes a lens body, on which a refractive correction zone is provided, a clear vision zone is provided in the center of the refractive correction zone, a central enhanced high defocus zone is provided in the center of the clear vision zone for transmitting myopia control visual signals to the retina, and a plurality of dot diffusion zones for changing light scattering and at least one focal ring with a specific defocus distribution are provided on the periphery of the clear vision zone. In this invention, a focal ring is formed in front of the retina through the focal ring and the central enhanced high defocus zone. This minimizes the impact on visual acuity during normal myopia control through optical defocus. Furthermore, while controlling myopia through defocus, the dot diffusion zone alters light scattering, thereby reducing image contrast. The lens uses the defocus zone and the dot diffusion zone to adjust the contrast and optical defocus visual signals to slow the increase in axial length, thus achieving a better myopia control effect. The central enhanced sensing zone primarily increases the visual accommodation signal in the central position of the photopic vision zone, acting as an inductive aid. By increasing the optical defocus or contrast visual signals in the central enhanced sensing zone, the retina is stimulated, effectively slowing the increase in axial length. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 The light path distribution diagram of the myopia control contact lens provided by the present invention through the lens body.

[0021] Figure 2 This is a schematic diagram of the structure of the myopia control contact lens provided by the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of the central enhancement high point diffusion zone of the myopia control contact lens provided by the present invention.

[0023] Figure 4 This is a schematic diagram of the dot diffusion region of the myopia control contact lens provided by the present invention.

[0024] Figure 5 This is a schematic diagram of the first defocus zone distribution of the myopia control contact lens provided by the present invention.

[0025] Figure 6 This is a schematic diagram of the second type of defocus zone distribution for the myopia control contact lens provided by the present invention.

[0026] Figure 7 This is a schematic diagram of the third type of defocus zone distribution for the myopia control contact lens provided by the present invention.

[0027] Figure 8 This is a schematic diagram of the fourth defocus zone distribution of the myopia control contact lens provided by the present invention.

[0028] In the diagram: 1. Lens body; 2. Refractive correction zone; 3. Visible zone; 4. Central enhancement sensing zone; 5. Dot diffusion zone; 6. Focal ring; 7. Defocus zone; 7a. First defocus zone; 7b. Another defocus zone; 7c. First defocus zone; 7d. Second defocus zone; 7e. Third defocus zone; 8a. First scattering cavity; 9a. First smooth layer; 10a. First concave-convex structure; 8b. First scattering cavity; 9b. First smooth layer; 10b. First concave-convex structure. Detailed Implementation

[0029] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0031] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may have other meanings besides indicating orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0032] Furthermore, the terms “first” and “second” as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are used only to distinguish one element from another. When used herein, the singular forms “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having” specify the presence of the stated features, integrals, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integrals, steps, operations, components, parts, or combinations thereof.

[0033] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0034] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0035] like Figure 1 and Figure 2 As shown, the myopia control contact lens provided by the present invention includes a lens body 1, a refractive correction zone 2 is provided on the lens body 1, a clear vision zone 3 is provided in the middle of the refractive correction zone 2, a central enhancement sensing zone 4 for transmitting myopia control visual signals to the retina is provided in the middle of the clear vision zone 3, and a plurality of dot diffusion zones 5 for changing light scattering and at least one focal ring 6 with defocus distribution are provided on the periphery of the clear vision zone 3.

[0036] Understandably, the photopic zone 3 allows the image to be formed on the retina, thus correcting vision. The central intensifier zone 4 is mainly used to increase the visual accommodation signal in the central position of the photopic zone 3, making it play a guiding and assisting role. That is, by increasing the optical defocus visual signal or contrast visual signal in the central intensifier zone 4, the retina is stimulated, which can effectively prolong the growth of the axial length of the eye. Due to the central intensifier zone 4 and the focal ring 6, the image appears in front of the retina in the form of the focal ring 6. This reduces the visual impact of light passing through the refractive correction zone 2, that is, visual acuity is less affected, the visual interference to myopia control by increasing the defocus is minimal, and the halo effect is reduced.

[0037] It should be noted that the refractive correction zone 2 primarily serves to correct visual acuity, while the photopic zone 3 does not exhibit any defocus variation. In other words, the photopic zone 3 ensures stable image formation on the retina, guaranteeing clear imaging. The periphery of the photopic zone 3 is provided with several dot diffusion zones 5 to alter light scattering and at least one focal ring 6 with a defocus distribution. It can be understood that the focal ring 6 and dot diffusion zones 5 are located within the refractive correction zone 2, but they are independent regions from the refractive correction zone 2. That is, on the periphery of the photopic zone 3 and within the outer boundary of the refractive correction zone 2, the area excluding the area occupied by the focal ring 46 and the dot diffusion zone 5 constitutes the refractive correction zone 2.

[0038] It should be noted that the dot diffusion zone 5 reduces the contrast of image imaging by changing the scattering of light. In other words, the actual function of the dot diffusion zone 5 is to reduce the color contrast of image imaging, making the image less clear, like adding a slight astigmatism effect to normal vision. The ultimate goal is to make it impossible for the brain to clearly identify peripheral images according to rules, thus achieving the effect of myopia control. However, the myopia control visual signal generated by contrast and optical defocus is two independent signals. For example, when a user looks at a mobile phone in the dark with only the optical defocus lens, the optical defocus lens will not have a good myopia control effect. Therefore, the optical defocus visual signal alone is not enough. The optical defocus signal and the contrast visual signal need to work together to ensure that the user can achieve the effect of myopia control in various environments after wearing the lens. Furthermore, by setting the central enhancement sensing zone 4 in the middle of the clear vision zone 3, the central part of the clear vision zone 3 can also have the effect of myopia control without affecting the normal visual effect of the clear vision zone 3.

[0039] Compared with the prior art, in the technical solution of the present invention, a focal ring is formed in front of the retina by the focal ring 6 and the central enhancement sensing area 4. When myopia control is performed normally through optical defocus, the impact on visual acuity is minimized. At the same time as myopia control through defocus, the dot diffusion area 5 can change the scattering of light, thereby reducing the contrast of image imaging. This also makes it impossible for the brain to clearly identify peripheral images according to the rules. The contrast visual signal and the optical defocus visual signal change the thickness of the choroid, ultimately affecting the change of refractive power, thus achieving the effect of myopia control. By setting the central enhancement sensing area 7 in the middle of the visual zone 3, the central part of the visual zone 3 can also have the effect of myopia control without affecting the normal visual effect of the visual zone 3.

[0040] Optionally, the central enhancement sensing area 4 can be a central enhancement high defocus area with a defocus distribution or a central enhancement high-point diffusion area used to change light scattering. It should be noted that the central high enhancement high defocus area has a large defocus amount, which can enhance the defocus amount in the center of the photopic zone 3. The central enhancement high-point diffusion area can enhance the degree of light scattering, and the degree of light scattering is relatively large. That is, in the center of the photopic zone 3, without affecting normal visual effects, it can enhance the stimulation of the contrast visual signal on the retina. In other words, both the central enhancement high defocus area and the central enhancement high-point diffusion area can play a guiding and assisting role, that is, they can enhance the stimulation of the retina by optical defocus visual signals and contrast visual signals, thereby changing the choroidal thickness and ultimately affecting the change in refractive power, achieving the effect of myopia control.

[0041] In one embodiment, when the central enhancement sensing area 4 is a central enhancement high defocus area, it includes several defocus response areas of different thicknesses (not shown). It is understood that due to the different thicknesses of each defocus response area, there is a change in the amount of defocus in the central enhancement high defocus area, thereby generating an optical defocus visual signal to stimulate the retina, causing changes in the thickness of the choroid, and ultimately affecting the change in refractive power.

[0042] In another embodiment, such as Figure 3 As shown, when the central enhancement sensing area 4 is a central enhancement high-point diffusion area, it includes a first scattering cavity 8a and a first smooth layer 9a disposed on top of the first scattering cavity 8a. The first scattering cavity 8a contains a first concave-convex structure 10a for altering light scattering. It can be understood that when light enters the first scattering cavity 8a from the smooth layer, it passes through the first concave-convex structure 10a within the first scattering cavity 8a, altering the light scattering and thus reducing the contrast of the image. This prevents the brain from clearly recognizing peripheral images according to patterns, achieving the effect of myopia control.

[0043] Furthermore, such as Figure 3 and Figure 4As shown, the dot diffusion region includes a second scattering cavity 8b and a second smooth layer 9b disposed on top of the second scattering cavity 8b. A second concave-convex structure 10b is disposed within the second scattering cavity 8b to alter light scattering. The degree of undulation of the second concave-convex structure 10b is greater than that of the first concave-convex structure 10a. It should be noted that the degree of undulation of the concave-convex structure represents the difference between the highest and lowest points of the structure. The larger the difference, the stronger the alteration of light scattering. That is, the degree of undulation of the second concave-convex structure 10b is less than that of the first concave-convex structure 10a, enabling the central enhanced high-point diffusion region 4 to alter light scattering to a greater extent than the dot diffusion region 5, thus playing a guiding and assisting role. This enhances the transmission of contrast visual signals in the retinal pigment epithelial cells. In the choroid, the contrast visual signal can change the thickness of the choroid, ultimately affecting the refractive power and effectively slowing down the increase in axial length, achieving the effect of myopia control.

[0044] Furthermore, when the central enhancement sensing area 4 is a central enhancement high defocus area, the refractive power of the central enhancement high defocus area is greater than that of the photopic area 3. It can be understood that because the refractive power of the central enhancement high defocus area is larger, that is, the defocus amount is larger, the optical defocus visual signal that can be transmitted to the retina is stronger, so that it plays a guiding and assisting role. This signal can be transmitted through the retinal pigment epithelial cells. In the choroid, the optical defocus visual signal can change the thickness of the choroid, ultimately affecting the change in refractive power, which can effectively delay the increase in axial length and achieve the effect of myopia control. Moreover, the central enhancement high defocus area is located in the middle of the photopic area 3, and its axis is collinear with the central axis of the photopic area 3, so that it plays a guiding and assisting role. Without affecting the normal visual effect of the photopic area 3, the central position of the photopic area 3 also has the effect of myopia control.

[0045] Specifically, several defocus zones 7 are arranged circumferentially within the focal ring 6. The defocus amount of the central enhanced high defocus zone 7 is greater than that of any other defocus zone 7 within the focal ring 6. It can be understood that since the central enhanced high defocus zone 7 is located in the middle of the photopic vision zone 3, the central enhanced high defocus zone 7 has less interference with the image imaging in the photopic vision zone 3. However, when the defocus amount of the defocus zone 7 within the focal ring 6 is too large, it can easily cause a poor overall visual effect. Moreover, since the defocus amount of the central enhanced high defocus zone 7 is greater than that of any other defocus zone 7 within the focal ring 6, it can generate a stronger optical defocus visual signal, playing a guiding and assisting role. It can better transmit the optical defocus visual signal to the retina, which can effectively slow down the growth of the axial length of the eye and achieve a better myopia control effect.

[0046] Specifically, the defocus amount of each defocus zone 7 is different, and the surface area of ​​each dot diffuser zone 5 is different. It should be noted that the different defocus amounts of each defocus zone 7 result in different distribution patterns of the total defocus amount across the refractive correction zone 2. This makes it difficult for the eye to adapt to the distribution pattern of higher defocus amounts in the defocus zone 7, preventing the brain from clearly recognizing peripheral images according to a predictable pattern. In other words, optical defocus visual signals can slow down the increase in axial length, thus achieving a long-term myopia control effect. The main function of the dot diffuser zone 5 is to change light scattering, thereby reducing the contrast of image imaging. The larger the surface area of ​​the dot diffuser zone 5, the greater the degree of light scattering, which has the greatest impact on image imaging. The direct factor is the surface area of ​​the dot diffusion zone 5. Since the surface area of ​​each dot diffusion zone 5 is different, the degree of light scattering in different areas on the periphery of the visual zone 3 is different. This results in different contrasts in the image imaging of different areas on the periphery of the visual zone 3. It is easy for the brain to be unable to recognize the clarity of the image imaging in different areas on the periphery of the visual zone 3 in a regular manner. That is, the change in contrast signal can affect the increase of axial length. The stronger the contrast signal, the lower the contrast of the image imaging. Reducing the contrast of image imaging can effectively slow down the growth of axial length, thereby achieving a long-term myopia control effect.

[0047] More specifically, the dot diffusion areas 5 are circumferentially distributed around the defocus areas 7. This can be understood as the dot diffusion areas 5 being circumferentially distributed around the defocus areas 7, meaning the dot diffusion areas 5 are arranged around the defocus areas 7, and several defocus areas 7 are circumferentially arranged within the focal ring 6, such as... Figure 5As shown, if there are nine defocus zones 7, meaning there are nine structural layouts with point diffusion zones 5 surrounding the defocus zones 7, the function of the defocus zones 7 is to increase the amount of defocus, causing the light beam passing through the defocus zone 7 to focus in front of the retina, resulting in a blurred image on the retina. This forces a slowdown in the increase of the axial length of the eye. Because of the presence of the photopic zone 3, the defocus zones 7 do not cause the final image blurring of the eye. Rather, based on the fact that the image can be normally imaged on the retina through the photopic zone 3, the defocus zones 7 can provide the retina with a visual signal of optical defocus. The optical defocus signal can be transmitted through the pigment epithelial cells on the retina, causing a change in the thickness of the choroid, which can slow down the increase of the axial length of the eye, achieving near vision. The dot diffusion zone 5, centered on the defocus zone 7, is circumferentially distributed. It can generate both optical defocus visual signals and contrast visual signals in the defocus zone 7. Since the optical defocus visual signal and the contrast visual signal are two independent signals, when users look at things through their eyes in their daily lives, regardless of the distance of the object or the contrast of the object in the environment, these two signals are constantly transmitting signals to the pigment epithelial cells on the retina. This can effectively slow down the increase in the length of the eye axis. In other words, the dot diffusion zone 5, centered on the defocus zone 7, is circumferentially distributed. In addition to the myopia control effect generated in the defocus zone 7, it adds another myopia control effect, making the overall myopia control effect better.

[0048] Furthermore, such as Figure 5 As shown, the number of dot diffusion regions 5 within the same radius range varies along the radial direction. It can be understood that if the number of dot diffusion regions 5 within the radius range of a to b is m, and the number of dot diffusion regions 5 within the radius range of b to c is n, where c is greater than b, greater than a, and ba equals cb, then n is greater than m. It should be noted that the different number of dot diffusion regions 5 within the same radius range along the radial direction indicates that, from the center of the visual field 33 outwards, the dot diffusion regions 5 cause different degrees of light scattering, resulting in inconsistent patterns of low image contrast. This makes it difficult for the brain to recognize the clarity of image imaging according to a consistent pattern, which can slow down the increase in axial length and achieve the effect of myopia control.

[0049] Furthermore, in the radial direction, the total surface area of ​​the dot diffusion zone 5 within the same radius increases. It should be noted that the larger the area of ​​the dot diffusion zone 5, the greater the degree of light scattering, resulting in a smaller image contrast. This causes the image contrast of the image passing through the refractive correction zone 2 to gradually decrease in the direction from the photopic zone 3 outwards, making the peripheral images relatively blurry. This prevents the brain from clearly recognizing the peripheral images according to the rules, thereby achieving the effect of myopia control. In the radial direction, the increasing total surface area of ​​the dot diffusion zone 5 within the same radius also ensures that the image located in the middle of the retina is clearer, ensuring that while myopia control is achieved, normal image formation is also guaranteed, that is, the user can see things clearly.

[0050] Furthermore, such as Figure 6 As shown, in the radial direction, the defocusing amount of the defocused area 7 within the same radius size range is different. It is understandable that if two defocus zones 7 are set at an angle of 60° and a radius of 7mm-8mm, namely one defocus zone 7a and another defocus zone 7b, that is, the defocus amount of the two defocus zones 7 located at 60° with the same radius is different. For example, if one defocus zone 7a is located between 7mm-7.5mm and the other defocus zone 7b is located between 7.5mm-8mm, and the defocus amount of one defocus zone 7a is a0 and the defocus amount of the other defocus zone 7b is b0, then a0 is not equal to b0. This means that the defocus amount of each defocus zone 7 is different within the same radius size range in the radial direction. This results in an irregular distribution of the defocus amount on the refractive correction area 2, making it difficult for the brain to get used to or recognize the distribution of the defocus amount on the refractive correction area 2. This makes it difficult for the brain to clearly recognize the peripheral image, thus maintaining the effect of delaying the growth of the eye axis and achieving the effect of myopia control.

[0051] Furthermore, the defocus amount of each defocus zone 7 increases outward from the center of the photopic zone 3. Understandably, the defocus amount of the defocus zone 7 decreases as it gets closer to the photopic zone 3. While a larger defocus amount results in better myopia control, it can also cause eye discomfort and even blurry images. To ensure greater comfort, the defocus amount of each defocus zone 7 increases outward from the center of the photopic zone 3. This ensures better wearing comfort while controlling myopia, and also allows the photopic zone 3 to project a clear image onto the retina.

[0052] Specifically, such as Figure 7As shown, the amount of defocusing in each defocusing zone 7 increases differently from the center of the bright field 3 outwards. It can be understood that, as shown in the figure, three defocusing zones 7 are set within an angular direction of 30° and a radius of 7mm-8.5mm: the first defocusing zone 7c, the second defocusing zone 7d, and the third defocusing zone 7e. The first defocusing zone 7c is located between 7mm and 7.5mm, the second defocusing zone 7d is between 7.5mm and 8mm, and the third defocusing zone 7e is between 8mm and 8.5mm. If the angular direction is 30°, the defocusing amount of the first defocusing zone 7c is a1, and the defocusing amount of the second defocusing zone 7d is... If the defocus amount is b1 and the defocus amount of the third defocus zone 7e is c1, then c1 is greater than b1, which is greater than a1. Furthermore, the difference between c1 and b1 is not equal to the difference between b1 and a1. This means that the defocus amount of each defocus zone 7 increases at different gradients in the direction from the center of the photopic vision zone 3 outwards. This results in an irregular distribution of the defocus amount in the radial direction of the defocus zone 7, making it difficult for the brain to quickly become accustomed to recognizing the distribution pattern of the defocus amount in the defocus zone 7. Consequently, the brain cannot clearly recognize peripheral images, thus achieving the effect of myopia control.

[0053] Furthermore, the defocusing amount of defocused areas 7 differs within the same angular gradient range in the angular direction. This is understandable, as... Figure 6 As shown, if the defocus area 7 within the angle range of 30°-60° has a defocus amount of a2, and the defocus area 7 within the angle range of 60°-90° has a defocus amount of b2, then b2 is not equal to a2. This results in an irregular distribution of defocus amount in the angular direction, i.e., the circumferential direction. This makes it difficult for the brain to get used to the distribution pattern of defocus amount in the angular direction of the defocus area 7, making it impossible for the brain to clearly identify peripheral images according to the pattern. This can effectively delay the growth of the eye axis, thereby achieving the effect of myopia control.

[0054] In summary, the myopia control contact lens provided by this invention has different defocus amounts in each defocus zone 7 and different surface areas in each dot diffusion zone 55. This makes it difficult for the brain to regularly identify the clarity of image formation in different areas on the periphery of the visual zone 3, thus preventing the brain from clearly identifying peripheral images. In other words, optical defocus visual signals and contrast visual signals can slow down the increase in axial length, thereby achieving a long-term myopia control effect. The dot diffusion zones 5 are distributed circumferentially around the defocus zone 7, adding another myopia control effect to the myopia control effect produced by the defocus zone 7, making the overall myopia control effect better. In the radial direction, the total surface area of ​​the dot diffusion zones 5 within the same radius increases, ensuring that while achieving myopia control, normal image formation is also guaranteed, meaning that the user can see things clearly. Compared with the prior art, in the technical solution of the present invention, the defocus amount of the defocus zone 7 varies irregularly in the radial and angular directions, making it difficult for the eye to adapt to the distribution pattern of the defocus amount on the defocus zone 7. This makes it impossible for the brain to clearly identify peripheral images according to the pattern, thereby achieving a longer-term myopia control effect. In addition, while controlling myopia through defocus, the dot diffusion zone 5 can change the scattering of light, thereby reducing the contrast of image imaging. This also makes it impossible for the brain to clearly identify peripheral images according to the pattern. The contrast visual signal and the optical defocus visual signal change the thickness of the choroid, ultimately affecting the change of refractive power and achieving the effect of myopia control.

[0055] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present invention.

Claims

1. A myopia control contact lens, characterized in that, The lens includes a lens body, on which a refractive correction zone is provided. A clear vision zone is provided in the center of the refractive correction zone. A central enhancement sensing zone for transmitting myopia control visual signals to the retina is provided in the center of the clear vision zone. A plurality of dot diffusion zones for changing light scattering and at least one focal ring with defocus distribution are provided on the periphery of the clear vision zone. The central enhancement sensing zone is a central enhancement high defocus zone with defocus distribution. A plurality of defocus zones are provided in the circumferential direction within the focal ring. The defocus amount of the central enhancement high defocus zone is greater than the defocus amount of any defocus zone within the focal ring.

2. A myopia control contact lens, characterized in that, The lens includes a lens body, on which a refractive correction zone is provided. A clear vision zone is provided in the center of the refractive correction zone. A central enhancement sensing zone for transmitting myopia control visual signals to the retina is provided in the center of the clear vision zone. A plurality of point diffusion zones for changing light scattering and at least one focal ring with defocus distribution are provided on the periphery of the clear vision zone. The central enhancement sensing zone is a central enhancement high point diffusion zone for changing light scattering. The central enhanced high-point diffusion region includes a first scattering cavity and a first smooth layer disposed on top of the first scattering cavity. The first scattering cavity is provided with a first concave-convex structure for changing light scattering. The point diffusion region includes a second scattering cavity and a second smooth layer disposed on top of the second scattering cavity. The second scattering cavity is provided with a second concave-convex structure for changing light scattering. The degree of undulation of the second concave-convex structure is greater than that of the first concave-convex structure.

3. The myopia control contact lens according to claim 1, characterized in that, The central enhanced high defocus zone includes several defocus reaction zones of different thicknesses.

4. The myopia control contact lens according to claim 1, characterized in that, The refractive power of the central enhanced high defocus zone is greater than that of the photopic zone.

5. The myopia control contact lens according to claim 2, characterized in that, The surface area of ​​each of the point diffusion regions is different.

6. The myopia control contact lens according to claim 1, characterized in that, The point diffusion region is circumferentially distributed with the defocus region as the center.

7. The myopia control contact lens according to claim 1, characterized in that, In the radial direction, the defocusing amount of the defocused area varies within the same radius size range.

Images