CN118642278A - A myopia control contact lens based on contrast and optical helix - Google Patents

Abstract

The invention provides a myopia control contact lens based on contrast and optical spiral, which comprises a lens main body, wherein the lens main body comprises a bright visual zone and an outer ring optical zone positioned at the periphery of the bright visual zone, the outer ring optical zone is based on spiral refraction design on a free curved surface to form a light spiral zone, the light spiral zone takes the bright visual zone as a center and is circumferentially distributed, so that optical vortex is generated on the outer ring optical zone, the outer ring optical zone is also provided with point diffusion zones which are mutually independent of the light spiral zone, the point diffusion zones and the light spiral zone are mutually arranged at intervals, and the point diffusion zones are used for changing light scattering. According to the invention, a myopia control effect can be brought by the point diffusion region, and the imaging quality can be improved by the optical spiral region.

Description

A myopia control contact lens based on contrast and optical helix

Technical Field

The invention relates to the technical field of contact lenses, and in particular to a myopia control contact lens based on contrast and optical helix.

Background Art

Currently, most studies on myopia control focus on children and adolescents. Prospective studies on myopia in young adults show that most myopia patients progress to a certain degree over a considerable period of time, and some emmetropes progress to myopia. The progression of myopia varies among myopia patients of different ages. Although the rate of myopia progression slows down after adulthood, it still continues, especially among students with heavy academic burdens.

There are few studies evaluating myopia control methods in the adult population. Defocus soft lenses used for children require high accommodation, and adults find it difficult to adapt after wearing them for a long time. In addition, glare and blurred vision are more obvious.

Therefore the prior art still needs to be improved and enhanced.

Summary of the invention

In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a myopia control contact lens based on contrast and optical helix, which can improve the myopia control effect and visual quality.

In order to achieve the above object, the present invention adopts the following technical solutions:

A myopia control contact lens based on contrast and optical spiral, comprising a lens body, wherein the lens body comprises a clear vision zone and an outer optical zone located on the periphery of the clear vision zone, an optical spiral zone is formed on the outer optical zone based on a spiral refractive design on a free-form surface, the optical spiral zone is circumferentially distributed with the clear vision zone as the center, so that an optical vortex is generated on the outer optical zone, and a point diffusion zone independent of the optical spiral zone is also arranged on the outer optical zone, the point diffusion zone and the optical spiral zone are spaced apart from each other, and the point diffusion zone is used to change the scattering of light.

Furthermore, the optical spiral region is composed of a plurality of microlenses, and the plurality of microlenses are distributed in an array.

Furthermore, the microlens is manufactured by a turning process.

Furthermore, the diameter of the clear vision area is 3mm-4mm.

Furthermore, the total area of the point diffusion region accounts for less than 50% of the total area of the lens body.

Furthermore, the point diffusion area includes a plurality of point diffusion positions, and the point diffusion positions include a scattering cavity and a smooth layer. The smooth layer is arranged on the top of the scattering cavity, and the smooth layer is used to contact the eyes. A concave-convex structure for changing the scattering of light is arranged in the scattering cavity.

Furthermore, the concave-convex structure is wavy.

Furthermore, the total area of the point diffusion positions of each point diffusion zone on the outer optical zone is different.

Further, in a direction from the inner circle of the outer circle optical zone toward the outer circle of the outer circle optical zone, the number of point diffusion positions on the point diffusion zone within the same radius size range is different.

Furthermore, in a direction from the inner circle of the outer circle optical zone toward the outer circle of the outer circle optical zone, the total area of the point diffusion positions on the point diffusion zone within the same radius size range increases.

Compared with the prior art, the myopia control contact lens based on contrast and optical spiral provided by the present invention includes a lens body, the lens body includes a clear vision area and an outer optical zone located on the periphery of the clear vision area, the outer optical zone is formed based on a spiral refractive design on a free-form surface to form an optical spiral zone, the optical spiral zone is circumferentially distributed with the clear vision area as the center, so that an optical vortex is generated on the outer optical zone, and a point diffusion zone independent of the optical spiral zone is also provided on the outer optical zone, the point diffusion zone and the optical spiral zone are spaced apart from each other, and the point diffusion zone is used to change the scattering of light. According to the present invention, the point diffusion zone can bring about a myopia control effect, and the optical spiral zone can improve the quality of imaging.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

FIG1 is a schematic diagram of a portion of the structure of a myopia control contact lens based on contrast and optical helix provided by the present invention.

FIG. 2 is a schematic structural diagram of a myopia control contact lens based on contrast and optical helix provided by the present invention.

FIG3 is an enlarged schematic diagram of point A in FIG2 .

FIG. 4 is a schematic structural diagram of the point spread of the myopia control contact lens based on contrast and optical helix provided by the present invention.

FIG5 is a schematic structural diagram of an embodiment of a myopia control contact lens based on contrast and optical helix provided by the present invention.

FIG6 is a schematic structural diagram of another embodiment of the myopia control contact lens based on contrast and optical helix provided by the present invention.

Description of the accompanying drawings:

1. Lens body; 11. Clear vision zone; 12. Outer optical zone; 121. Light spiral zone; 122. Point diffusion zone; 122a. First point diffusion zone; 122b. Second point diffusion zone; 1220. Point diffusion position; 1221. Scattering cavity; 1222. Smooth layer; 1223. Concavo-convex structure.

DETAILED DESCRIPTION

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

In addition, the terms "first" and "second" etc. used in this application can be used to describe various elements in this article, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. When used here, the singular "one", "one" and "said/the" can also include plural forms, unless the context clearly indicates another way. It should also be understood that the terms "include/comprise" or "have" etc. specify the existence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of existing or adding one or more other features, wholes, steps, operations, components, parts or combinations thereof.

It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

The "myopic eye" referred to in the present invention refers to the following eyes: already experiencing myopia, in the pre-myopia stage, at risk of developing myopia, diagnosed as having a refractive condition progressing towards myopia, and having an astigmatism of less than 1DC.

The "contact lens" referred to in the present invention refers to a finished contact lens used to fit on the cornea of the wearer to affect the optical properties of the eye, and the finished contact lens is usually packaged in a vial, a blister pack or the like.

As used herein, the "optical zone" refers to the area of the contact lens that has a prescribed optical effect including correction of refractive error and provides optical stimulation to slow the rate of myopia progression.

The "clear vision zone" referred to in the present invention refers to a region where the diopter is determined according to the diopter required for correcting myopia, and usually the diopter in the "clear vision zone" is a fixed value.

As shown in Fig. 1 and Fig. 2, the myopia control contact lens based on contrast and optical spiral provided by the present invention comprises a lens body 1, wherein the lens body 1 comprises a clear vision zone 11 and an outer optical zone 12 located at the periphery of the clear vision zone 11, and an optical spiral zone 121 is formed on the outer optical zone 12 based on a spiral refractive design on a free-form surface, and the optical spiral zone 121 is circumferentially distributed with the clear vision zone 11 as the center, so that an optical vortex is generated on the outer optical zone 12. A point diffusion zone 122 independent of the optical spiral zone 121 is also provided on the outer optical zone 12, and the point diffusion zone 122 is spaced apart from the optical spiral zone 121, and the point diffusion zone 122 is used to change the scattering of light.

It can be understood that the point diffusion region 122 is also distributed in a spiral and is spaced apart from the light spiral region 121 .

It can be understood that an optical vortex is a light beam with a spiral phase distribution. This light beam has orbital angular momentum, which allows the eyes to focus at different distances and under different lighting conditions, and has a better vision correction effect.

It should be noted that the clear vision area 11 mainly plays a role in vision correction, which can make the image be stably imaged on the retina to ensure clear imaging. The light spiral area 121 usually refers to the area with a spiral phase wavefront in the light beam. This light beam is also called a vortex light beam. In vortex phase contrast imaging, the vortex light beam can enhance the edge of the phase object, making the edge information of the object clearer, that is, in optical imaging, the image quality can be higher and clearer. The point diffusion area 122 is to reduce the contrast of the image by changing the scattering of light. In other words, the actual role of the point diffusion area 122 is to reduce the color contrast of the image, making the image less clear, just like normal vision with a slight astigmatism effect. The ultimate goal is to make the brain unable to clearly identify peripheral imaging according to the rules, so as to achieve the effect of myopia control.

Compared with the prior art, in the technical solution of the present invention, the point diffusion area 122 can change the scattering of light, thereby reducing the contrast of the image, so that the brain cannot clearly identify the peripheral imaging according to the rules, and the contrast visual signal changes the choroid thickness, which ultimately affects the change in diopter and achieves the effect of myopia control. The light spiral area 121 can make the edge information of the object clearer, that is, during optical imaging, the image can be made clearer and the imaging quality can be improved.

Furthermore, the optical spiral region 121 is composed of a plurality of micro lenses, and the plurality of micro lenses are distributed in an array.

It is understandable that each microlens can collect light from different directions. In this way, by collecting light from different angles, more scene information can be obtained, thereby improving the clarity and depth perception of imaging. The array distribution of microlenses can increase the sampling density of light on the imaging surface. Each microlens corresponds to a sampling point on the imaging surface. In this way, higher resolution and detail expression can be obtained than traditional imaging technology. The design of microlenses distributed in an array can reduce the aberrations and diffraction effects common in traditional imaging systems. Each microlens can focus light independently, thereby reducing the aberrations of the entire system and improving imaging quality.

Specifically, the microlens is manufactured by a turning process.

It can be understood that the turning process of microlenses is a method of processing microlenses using a CNC lathe. This process controls the moving axis and rotating axis of the lathe to move the tool along a predetermined trajectory on the surface of the workpiece, thereby cutting out the desired microlens shape. When turning a microlens, it is first necessary to design a suitable tool trajectory algorithm to ensure that the tool can accurately cut according to the designed shape. In the turning process, diamond tools are commonly used cutting tools because they have high hardness and wear resistance and can process high-precision microlens surfaces.

Furthermore, the diameter of the clear vision zone 11 is 3mm-4mm. For most standard soft contact lenses, the diameter of the clear vision zone 11 is usually in the range of 3mm-4mm. This size range can meet the visual needs of most people while ensuring that the edge of the contact lens can fit well with the surface of the eyeball and provide sufficient oxygen exchange.

Furthermore, the total area of the point diffusion region 122 accounts for less than 50% of the total area of the lens body 1, which can ensure that myopia control is achieved while ensuring clear optical imaging.

It is understood that if the point spread area 122 is too large, it may affect the optical clarity of the contact lens. If the optical center of the contact lens is not directly opposite the pupil, or there is a positioning problem with the lens, it may cause unclear vision. A smaller point spread area 122 helps ensure that light passes directly through the optical center, thereby improving visual clarity. The size of the point spread area 122 is also related to the comfort of the wearer. If the point spread area 122 is too large, it may increase the foreign body sensation or discomfort in the eyes, affecting the wearing experience.

Further, please refer to Figures 2, 3 and 4, the point diffusion area 122 includes a plurality of point diffusion positions 1220, and the point diffusion position 1220 includes a scattering cavity 1221 and a smooth layer 1222. The smooth layer 1222 is arranged on the top of the scattering cavity 1221, and the smooth layer 1222 is used to contact the eyes to improve the wearing comfort of the eyes. The scattering cavity 1221 is provided with a concave-convex structure 1223 for changing the scattering of light.

It is understandable that when light enters the scattering cavity 1221 from the smooth layer 1222, it passes through the concave-convex structure 1223 in the scattering cavity 1221, changing the scattering of the light, causing the light to propagate in multiple directions, thereby changing the propagation path of the light, thereby reducing the contrast of the image, causing abnormal high signal stimulation of the retina, and promoting excessive growth of the eye axis. By reducing the contrast, the point spread technology helps to inhibit this excessive growth and delay the progression of myopia.

Preferably, the concave-convex structure 1223 is wavy in shape, which can enhance the degree of scattering of light, that is, it can enhance the stimulation of contrast visual information on the retina, causing the choroidal thickness to change, ultimately affecting the change in refractive power and achieving the effect of myopia control.

Furthermore, the total area of the diffusion position of each point diffusion area 122 on the outer optical zone 12 is different, that is, in the angular direction, the degree of scattering of light by each point diffusion area 122 on the outer optical zone 12 is different.

It is understandable that when light passes through the point diffusion area 122 and acts on the eye, the degree of scattering of light obtained from different areas of the eye is different in the angular direction. At the moment of blinking, the lens body 1 is squeezed by the eyelid, causing the lens body 1 to shift on the eyeball, that is, the contrast of the original position on the eyeball is changed, making it difficult for the eye to get used to the distribution pattern of the contrast on the point diffusion area 122, making it impossible for the brain to clearly identify the peripheral imaging according to the pattern, and the contrast visual signal can change the choroidal thickness, affect the change of refractive power, and effectively delay the increase of the axial length, thereby achieving a longer-term myopia control effect.

Further, as shown in FIG5 , in the angular direction, the areas of the point spread positions 1220 on different point spread areas 122 within the same radius size range are different. It can be understood that two adjacent point spread areas 122 are respectively the first point spread area 122a and the second point spread area 122b, and the total areas of the point spread positions 1220 of the first point spread area 122a and the second point spread area 122b within the radius a to the radius b are respectively S1 and S2, and S1 is not equal to S2. When the lens body 1 is squeezed by the eyelid, a certain rotation will occur, resulting in the area of the point spread position 1220 at the position corresponding to the rotation of the contact lens being inconsistent with that before the rotation, which makes it easy for the brain to be unable to recognize the clarity of the image according to the rules, that is, the change of the contrast signal can affect the increase of the axial length of the eye. The stronger the contrast signal, the lower the contrast of the image. Reducing the contrast of the image can effectively delay the growth of the axial length of the eye, thereby achieving a long-term myopia control effect.

Further, please continue to refer to FIG. 5 , in the direction from the inner circle of the outer optical zone 12 toward the outer circle of the appearance optical zone, the number of point diffusion positions 1220 on the point diffusion zone 122 within the same radius is different.

It can be understood that if the number of point diffusion areas 122 within the range of radius a to radius b is m, the number of point diffusion areas 122 within the range of radius b to radius c is n, and c is greater than b and greater than a, b-a is equal to c-b, then n is not equal to m.

It should be noted that, in the direction from the inner circle of the outer optical zone 12 toward the outer circle of the appearance optical zone, that is, in the radial direction of the outer optical zone 12, the number of point spread positions 1220 within the same radius size range is different, which means that in the direction from the center of the clear vision zone 11 to the outside, the point spread positions 1220 cause different degrees of light scattering, resulting in an inconsistent rule of lower image contrast, which makes it impossible for the brain to recognize the clarity of the image according to the rule, and can delay the increase in the axial length of the eye, achieving the effect of myopia control.

Further, as shown in Fig. 6, the total area of the point spread position 1220 within the same radius increases in the direction from the inner circle of the outer circle optical zone 12 to the outer circle of the outer circle optical zone 12. If the total area of the point spread region 122 within the range of radius a to radius b is S3, and the total area of the point spread position 1220 within the range of radius b to radius c is S4, then S4 is greater than S3.

It should be noted that the larger the area of the point diffusion area 122, the greater the degree of light scattering, which results in a smaller contrast of the image, so that the contrast of the image through the refractive correction area gradually decreases from the clear vision area 11 to the outside, that is, the peripheral imaging is relatively blurred, so that the brain cannot clearly identify the peripheral imaging according to the rules, thereby achieving the effect of myopia control. In the radial direction, the total surface area of the point diffusion area 122 within the same radius increases, which can also ensure that the image located in the middle of the retina is clearer, ensuring that while controlling myopia, it can also ensure normal imaging of the image, that is, the user can see things normally.

Preferably, the area of the point diffusion positions 1220 of the point diffusion zone 122 gradually increases in a direction from the inner circle of the outer circle optical zone 12 to the outer circle of the outer circle optical zone 12 .

It can be understood that, as shown in FIG2 and FIG3, the area of a single point diffusion position 1220 on the point diffusion area 122 closer to the clear vision area 11 is smaller. Since the area of a single point diffusion position 1220 is larger, the effect of scattering light is more obvious. The clear vision area 11 mainly plays the role of correcting vision and is used for image formation. The clarity of image formation is relatively high. If the area of the point diffusion position closer to the clear vision area 11 is larger, it will affect the clarity of the image formation in the clear vision area 11, ensuring that the user can see the image formed by the clear vision area 11 clearly. In addition, if the area of a single point diffusion position 1220 is too large, it is easy to cause a more obvious local scattering effect of light during imaging, a lower contrast of imaging, and a blurred image, which may even cause the user to feel uncomfortable wearing due to the blur. Therefore, the area of the single point spread position 1220 gradually increases from the inner circle of the outer optical zone 12 toward the outer circle of the outer optical zone 12, which is not only beneficial to improving the clarity of the image in the bright vision zone, but also can reduce the contrast of the image. Moreover, the degree of contrast reduction from the inner circle of the outer optical zone 12 toward the outer circle of the outer optical zone 12 is different, so there is an inconsistency in the law of low image contrast, which makes it impossible for the brain to recognize the clarity of the image according to the law, and can delay the increase of the axial length of the eye, so as to achieve the effect of myopia control.

It should be noted that the main function of the point diffusion area 122 is to change the scattering of light, thereby reducing the contrast of image imaging. The larger the surface area of the point diffusion area 122, the greater the degree of light scattering, that is, the most direct factor affecting graphic imaging is the surface area of the point diffusion area 122, and the surface area of each point diffusion area 122 is different, so that the degree of light scattering in each area on the periphery of the clear vision area 11 is different, resulting in different image imaging contrast in each area on the periphery of the clear vision area 11, which makes it easy for the brain to be unable to recognize the clarity of the image imaging according to the rules, that is, the change of the contrast signal can affect the increase of the axial length of the eye, the stronger the contrast signal, the lower the contrast of the image imaging, and reducing the contrast of the image imaging can effectively delay the growth of the axial length of the eye, thereby achieving a long-term myopia control effect.

Furthermore, the point diffusion area 122 is actually distributed circumferentially with the clear vision area 11 as the center. The clear vision area 11 can be used to correct vision and play a role in normal imaging. In the user's daily life, when viewing things with the eyes, especially when observing brighter objects in a dark environment, such as turning off the lights at night to play with mobile phones, the contrast signal is always transmitting signals to the pigment epithelial cells on the retina, which can effectively delay the increase in the axial length of the eye, that is, the point diffusion area 122 is distributed circumferentially with the clear vision area 11 as the center, and the point diffusion area 122 can play a role in myopia control on the basis of normal imaging in the clear vision area 11.

Further, please refer to Figure 2. Along the inner circle of the outer ring optical zone 12 toward the outer circle of the outer ring optical zone 12, the width of the optical spiral zone 121 gradually increases, that is, in the radial direction of the outer ring optical zone 12, as the radius increases, the width of the area where the optical spiral zone 121 is located gradually increases, which can maintain the circumferential area occupancy of the outer ring optical zone 12, ensure that the image imaging effect is clear, and is conducive to improving the quality of image imaging.

In summary, the myopia control contact lens based on contrast and optical spiral provided by the present invention has microlenses distributed in an array, which can effectively improve the clarity of image imaging. The total area of the point diffusion area 122 accounts for less than 50% of the total area of the lens body 1, which can ensure that the myopia control function is achieved when the optical imaging is clear. The smooth layer 1222 is used to contact the eyes to improve the wearing comfort of the eyes. The total area of the diffusion points of each point diffusion area 122 on the outer optical zone 12 is different. In the direction from the inner circle of the outer optical zone 12 toward the outer circle of the appearance optical zone, the number of point diffusion positions 1220 on the point diffusion area 122 within the same radius is different, and the total area of the point diffusion area 122 within the same radius increases, making it difficult for the eyes to get used to the distribution pattern of the contrast on the point diffusion area 122, so that the brain cannot clearly identify the peripheral imaging according to the pattern, and can use the contrast visual signal to change the choroidal thickness, affect the change in refractive power, and effectively delay the increase in the axial length of the eye, thereby achieving a longer-term myopia control effect. According to the present invention, the point diffusion area 122 can bring about a myopia control effect, and the light spiral area 121 can improve the imaging quality.

The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, which all belong to the protection scope of the present invention.

Claims (10)

1. A myopia control contact lens based on contrast and optical spiral, comprising a lens body, characterized in that the lens body comprises a clear vision zone and an outer optical zone located on the periphery of the clear vision zone, an optical spiral zone is formed on the outer optical zone based on a spiral refractive design on a free-form surface, the optical spiral zone is circumferentially distributed with the clear vision zone as the center, so that an optical vortex is generated on the outer optical zone; a point diffusion zone independent of the optical spiral zone is also provided on the outer optical zone, the point diffusion zone and the optical spiral zone are spaced apart from each other, and the point diffusion zone is used to change the scattering of light. 2. The myopia control contact lens based on contrast and optical spiral according to claim 1, characterized in that the optical spiral zone is composed of a plurality of microlenses, and the plurality of microlenses are distributed in an array. 3. The myopia control contact lens based on contrast and optical helix according to claim 3, characterized in that the microlens is made by turning process. 4. The myopia control contact lens based on contrast and optical helix according to claim 1, characterized in that the diameter of the clear vision zone is 3mm-4mm. 5. The myopia control contact lens based on contrast and optical helix according to claim 1, characterized in that the total area of the point diffusion zone accounts for less than 50% of the total area of the lens body. 6. The myopia control contact lens based on contrast and optical spiral according to claim 1 is characterized in that the point diffusion area includes a plurality of point diffusion positions, and the point diffusion positions include a scattering cavity and a smooth layer, the smooth layer is arranged on the top of the scattering cavity, the smooth layer is used to contact the eye, and a concave-convex structure for changing the scattering of light is arranged in the scattering cavity. 7. The myopia control contact lens based on contrast and optical helix according to claim 6, characterized in that the concave-convex structure is wavy. 8. The myopia control contact lens based on contrast and optical helix according to claim 7, characterized in that the total area of the point diffusion positions of each of the point diffusion zones on the outer optical zone is different. 9. The myopia control contact lens based on contrast and optical spiral according to claim 7 is characterized in that the number of point diffusion positions on the point diffusion area within the same radius size range is different in the direction from the inner circle of the outer circle optical zone toward the outer circle of the outer circle optical zone. 10. The myopia control contact lens based on contrast and optical spiral according to claim 9 is characterized in that the total area of the point diffusion positions on the point diffusion zone within the same radius size range increases in the direction from the inner circle of the outer circle optical zone toward the outer circle of the outer circle optical zone.