Contact lens and contact lens assembly

Abstract

The utility model provides a contact lens and a contact lens assembly, and relates to the technical field of ophthalmic optics. The contact lens comprises a central area and a peripheral area surrounding the periphery of the central area; the central region has a plurality of functional regions. As the functional area adopts an asymmetric design, the user randomly wears the same pair of lenses every day, so that the pattern design on the functional area is different from the relative position of the cornea, and the stimulation position on the retina is randomly changed; or, the user wears lenses with different designs every day, the functional area is divided into the contrast reduction area capable of reducing the contrast of the retina and the transparent area or the partial transparent area, the transparent area or the partial transparent area can be designed without design or combined with myopia defocus design, the stimulation position on the retina can be changed at any time, and the retina stimulation effect is improved. The drug resistance of eyes is greatly delayed; a better control effect can be achieved by combining retinal contrast reduction and myopia defocus design.

Description

Technical Field

[0001] This utility model relates to the field of optometry technology, and in particular to a contact lens and a contact lens assembly. Background Technology

[0002] Related genetic studies show that children with mutations in the myopia-related gene locus MYP1 have abnormally increased retinal contrast signals, which may lead to high myopia. Several proven effective myopia management techniques have been found to cause decreased contrast sensitivity during use. Meanwhile, other studies have found that the visual signals affecting emmetropization mainly include contrast and optical defocus. These originate inside the eye, are transmitted through different signal pathways, and influence each other. Currently, all treatments based on optical defocus signals, in addition to changing the focusing of light on the retina, also reduce retinal contrast signals. The efficacy may partly come from the combined effect of reduced contrast signals and myopic defocus. The combined effect of myopic defocus and reduced retinal contrast signals slows myopia progression and can also explain why the growth signal generated by positive lenses is usually stronger than that generated by negative lenses; that is, changes in retinal contrast signals can counteract hyperopic defocus. Therefore, the theory of reducing retinal contrast has broad application prospects in the field of myopia prevention and control, and its combined effect with myopic defocus may achieve a synergistic effect greater than the sum of its parts.

[0003] The functional areas of existing eyeglasses are distributed throughout the entire lens, and the functional areas of the entire lens are highly symmetrical and consistent. In recent years, clinical use of various myopia prevention and control methods has revealed that the eyes will exhibit a kind of "drug resistance" to a fixed and consistent control method. Products with the same symmetrical design have poor prevention and control effects. Utility Model Content

[0004] This invention provides a contact lens to solve the problem that the existing technology has poor prevention and control effect due to the use of symmetrical design.

[0005] This invention provides a contact lens, including a central region and a peripheral region surrounding the central region; the central region has multiple functional areas, including multiple contrast-reducing areas and multiple transparent areas or partially transparent areas; the multiple contrast-reducing areas and the multiple transparent areas or partially transparent areas are arranged alternately along the circumference or radial direction of the central region, and the contrast-reducing areas adjust the contrast of the image formed on the retina by the contact lens by changing at least one of their own pattern and color.

[0006] According to the present invention, a contact lens has a ring-shaped functional area, and multiple ring-shaped functional areas are concentrically arranged. Multiple contrast-reducing areas and multiple transparent areas or partially transparent areas are arranged alternately along the radial direction of the central area.

[0007] According to the present invention, a contact lens is provided in which the central region of the central area is the contrast-reducing area, the transparent area or the partially transparent area on the outer periphery is the vision correction area, and it has a prescription optical power for vision correction.

[0008] According to the present invention, a contact lens is provided in which the central region of the central area is the transparent area or the partially transparent area, and at least the transparent area or the partially transparent area located in the central region is a vision correction area, and has a prescription optical power for vision correction.

[0009] According to the present invention, a contact lens is provided in which the central region of the central area is the transparent area or the partially transparent area, the transparent area or the partially transparent area located at least in the central area is the vision correction area, the remaining transparent area or the partially transparent area is the peripheral defocus area, and the optical power of the peripheral defocus area is greater than that of the vision correction area.

[0010] According to the present invention, a contact lens is provided in which the central region of the central area is the transparent area or the partially transparent area, the transparent area or the partially transparent area of ​​the central area is the vision correction area, the contrast reduction area and the remaining transparent area or the partially transparent area are both peripheral defocus areas, and the optical power of the peripheral defocus area is greater than that of the vision correction area.

[0011] According to the present invention, a contact lens has a functional area that is fan-shaped, and multiple contrast-reducing areas and multiple transparent areas or partially transparent areas are arranged alternately along the circumference of the central area.

[0012] According to the present invention, at least two of the functional areas have different central angles.

[0013] According to the present invention, a contact lens is provided in which the transparent area or the partially transparent area is located in the central region of the central area, the contrast-reducing area and the remaining transparent area or the partially transparent area are both fan-shaped rings, and the contrast-reducing area and the remaining transparent area or the partially transparent area are arranged alternately around the central region along the circumference of the central region.

[0014] According to the present invention, a contact lens is provided in which at least the transparent area or the partially transparent area located in the central region is a vision correction area and has a prescription optical power for vision correction.

[0015] According to the present invention, the transparent area or the partially transparent area located in the central region is a vision correction zone and has a prescription optical power for vision correction; the remaining transparent area or the partially transparent area is a peripheral defocus zone, and the optical power of the peripheral defocus zone is greater than that of the vision correction zone.

[0016] According to the present invention, a plurality of functional areas located within the same annular region are all fan-shaped rings, and the plurality of functional areas located within the same annular region are arranged at circumferential intervals.

[0017] According to the present invention, the functional areas located in different annular regions have the same axis of symmetry.

[0018] According to the present invention, the sides of the functional areas located in different annular regions are on the same straight line.

[0019] According to the present invention, a contact mirror is provided in which multiple functional areas located within the same annular region have equal areas.

[0020] According to the present invention, a contact lens is provided in which the images of multiple reduced contrast areas are identical.

[0021] According to the present invention, a contact mirror is provided in which at least one of the patterns and colors of the plurality of contrast-reducing areas is different.

[0022] According to the present invention, a plurality of functional regions are arranged sequentially along a spiral in the central region, such that the plurality of contrast-reducing regions and the plurality of transparent regions or the partially transparent regions are arranged alternately along the radial direction of the central region, and at least one of the pattern, color and width of the contrast-reducing regions varies along the length direction of the spiral.

[0023] According to the present invention, a contact lens is provided in which the transparent area or the partially transparent area in the central region of the central area is a vision correction area and has a prescription optical power for vision correction; the remaining transparent areas or the partially transparent areas surrounding the central region are all peripheral defocus areas, and the optical power of the peripheral defocus areas is greater than that of the vision correction area.

[0024] According to the present invention, the transparent area or the partially transparent area located in the central region of the central area, and the remaining transparent area or the partially transparent area surrounding the central region are all vision correction areas with a prescription optical power for correcting vision.

[0025] According to the present invention, a contact lens is provided in which the central region of the central area is the contrast-reducing region, and the remaining transparent region or the partially transparent region surrounding the central region is a vision correction zone with a prescription optical power for correcting visual acuity.

[0026] According to the present invention, the width of the functional area gradually increases, gradually decreases, increases and then decreases, decreases and then increases, increases and then decreases and then increases, or decreases and then increases and then decreases along the length direction of the spiral.

[0027] According to the present invention, the pattern of the contrast-reducing region is fixed along the length direction of the spiral.

[0028] According to the present invention, a contact lens is provided in which the transparent area or the partially transparent area located in the central region of the central area is a vision correction area and has a prescription optical power for vision correction; the plurality of the reduced contrast areas are regular hexagonal areas surrounding the central region, and at least one of the patterns and colors of two adjacent reduced contrast areas are different.

[0029] According to the present invention, a contact lens is provided in which the transparent area or the partially transparent area located in the central region of the central area is a vision correction area and has a prescription optical power for vision correction; the contrast reduction area and the remaining transparent area or the partially transparent area are both regular polygons, and the contrast reduction area and the remaining transparent area or the partially transparent area form a regular polygon area around the central region, and the regular polygon area is a peripheral defocus area, the optical power of the peripheral defocus area is greater than the optical power of the vision correction area.

[0030] According to the contact lens provided by this utility model, the remaining transparent area or the partially transparent area are all regular polygons and are vision correction areas with prescription optical power for correcting vision.

[0031] According to the present invention, a contact lens includes a substrate layer, a functional layer and a protective layer arranged sequentially along the thickness direction of the contact lens. The contrast-reducing region is formed by the functional layer, and the transparent region or the partially transparent region is formed by the substrate layer and the protective layer.

[0032] According to the present invention, a contact lens is provided with a vision correction zone having a prescription optical power in the central area of ​​the central region. When the central region is circular, the diameter of the central region is 1-2 mm; when the central region is non-circular, the diameter of the inscribed circle of the central region is 1-2 mm.

[0033] According to the present invention, a contact lens is provided in the peripheral area with a self-rotating structure for automatically rotating the contact lens.

[0034] According to the present invention, a contact lens with a self-rotating structure includes a tear channel disposed in the peripheral region. The tear channel is located on the front or rear surface of the contact lens and extends radially along the contact lens. The structure of the tear channel has at least one of the following configurations:

[0035] The cross-sectional area or cross-sectional width of the tear channel gradually decreases from the first end to the second end of the tear channel;

[0036] At least one of the first and second ends of the tear channel forms a port at the edge of the contact lens;

[0037] The first and second ends of the tear channel are located at different positions in the circumferential direction of the contact lens;

[0038] The tear channel extends from the edge of the contact lens first toward the defocused area, and then toward the defocused area.

[0039] According to the contact lens provided by this utility model, when the tear channel extends from the edge of the contact lens first toward the defocused area and then toward the defocused area, the structure of the tear channel has at least one of the following conditions:

[0040] The tear channel is V-shaped, C-shaped, or U-shaped;

[0041] The tear channel has opposing first and second sidewalls, both of which extend along the length of the tear channel; preferably, the first and second sidewalls have the same curvature, and the curvature of the first sidewall is greater than that of the second sidewall.

[0042] According to the contact lens provided by this utility model, the self-rotating structure includes multiple tear channels, and the structure of the tear channels has at least one of the following characteristics:

[0043] Multiple tear channels are arranged at circumferential intervals along the contact lens;

[0044] At least a portion of the tear channel is a groove-like structure disposed on the rear surface of the contact lens;

[0045] At least a portion of the tear channel is located inside the contact lens;

[0046] The cross-sectional area or cross-sectional width of the tear channel varies continuously or in stages along the length of the tear channel;

[0047] At least a portion of the tear channel extends radially along the contact lens;

[0048] At least a portion of the tear channel has a cross-sectional area or cross-sectional width that gradually decreases in the radial inward direction along the contact mirror.

[0049] According to the present invention, a contact lens is a scleral contact lens or a corneal contact lens, wherein the corneal contact lens is a soft corneal contact lens, a rigid corneal contact lens, or a hybrid corneal contact lens, wherein the rigid corneal contact lens is a rigid non-permeable corneal contact lens, a rigid permeable corneal contact lens, or an orthokeratology lens.

[0050] This utility model also provides a contact lens assembly, including a plurality of contact lenses as described in any of the preceding claims, wherein the functional areas of two adjacent contact lenses are different, and when worn, the two adjacent contact lenses form a wearing assembly to produce different stimuli to the retina.

[0051] According to the present invention, a contact lens assembly is provided, the contact lens assembly comprising at least two contact lenses, the contact lenses being daily disposable, weekly disposable, semi-monthly disposable, monthly disposable, quarterly disposable, semi-annual disposable, or annual disposable.

[0052] The contact lens provided by this utility model, due to its asymmetrical design of the functional areas, allows users to wear the same lens randomly every day, resulting in different relative positions of the pattern design on the functional areas and the cornea, thus randomly changing the stimulation position on the retina. Alternatively, users can wear lenses with different designs every day, as the functional areas are divided into contrast-reducing areas and transparent or partially transparent areas. The transparent or partially transparent areas can be undesigned or combined with myopia defocus design, causing the stimulation position on the retina to change at any time, greatly delaying the emergence of "drug resistance" in the eyes. By combining contrast-reducing areas with myopia defocus design, a better control effect can be achieved. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0054] Figure 1 This is one of the structural schematic diagrams of the contact lens provided by this utility model.

[0055] Figure 2 This is the second schematic diagram of the contact mirror provided by this utility model.

[0056] Figure 3 This is the third schematic diagram of the contact lens provided by this utility model.

[0057] Figure 4 This is the fourth schematic diagram of the contact lens provided by this utility model.

[0058] Figure 5 This is the fifth schematic diagram of the contact lens provided by this utility model.

[0059] Figure 6 This is the sixth schematic diagram of the contact mirror provided by this utility model.

[0060] Figure 7 This is the seventh schematic diagram of the contact mirror provided by this utility model.

[0061] Figure 8 This is the eighth schematic diagram of the contact mirror provided by this utility model.

[0062] Figure 9 This is the ninth schematic diagram of the contact mirror provided by this utility model.

[0063] Figure 10 This is the tenth schematic diagram of the structure of the contact mirror provided by this utility model.

[0064] Figure 11 This is the eleventh schematic diagram of the structure of the contact mirror provided by this utility model.

[0065] Figure 12 This is the twelfth schematic diagram of the structure of the contact mirror provided by this utility model.

[0066] Figure 13 This is the thirteenth structural schematic diagram of the contact mirror provided by this utility model.

[0067] Figure 14 This is the fourteenth schematic diagram of the contact mirror provided by this utility model.

[0068] Figure 15 This is the fifteenth schematic diagram of the structure of the contact mirror provided by this utility model.

[0069] Figure 16 This is the sixteenth schematic diagram of the structure of the contact mirror provided by this utility model.

[0070] Figure 17 This is the seventeenth schematic diagram of the contact mirror provided by this utility model.

[0071] Figure 18 This is the eighteenth schematic diagram of the contact mirror provided by this utility model.

[0072] Figure 19 This is the nineteenth schematic diagram of the structure of the contact mirror provided by this utility model.

[0073] Figure 20 This is the twentieth structural schematic diagram of the contact mirror provided by this utility model.

[0074] Figure 21 This is the twenty-first schematic diagram of the contact mirror provided by this utility model.

[0075] Figure 22 This is the twenty-second schematic diagram of the contact mirror provided by this utility model.

[0076] Figure 23 This is the twenty-third schematic diagram of the contact mirror provided by this utility model.

[0077] Figure 24 This is the twenty-fourth structural schematic diagram of the contact mirror provided by this utility model.

[0078] Figure 25 This is a side view cross-sectional structural diagram of the contact mirror provided by this utility model.

[0079] Figure 26 This is one of the main view structural schematic diagrams of the contact lens provided by this utility model.

[0080] Figure 27 This is the second schematic diagram of the main view structure of the contact lens provided by this utility model.

[0081] Figure 28 This is one of the cross-sectional structural schematic diagrams of the contact mirror provided by this utility model.

[0082] Figure 29 yes Figure 28 A partially enlarged structural diagram.

[0083] Figure 30 This is the second cross-sectional structural schematic diagram of the contact mirror provided by this utility model.

[0084] Figure 31 yes Figure 30 A partially enlarged structural diagram.

[0085] Figure 32 This is one of the main view structural schematic diagrams of the contact lens provided by this utility model.

[0086] Figure 33 yes Figure 32 A schematic diagram of the tear channel structure.

[0087] Figure 34 This is the second schematic diagram of the main view structure of the contact lens provided by this utility model.

[0088] Figure 35 This is the third schematic diagram of the main view structure of the contact lens provided by this utility model.

[0089] Figure 36 This is the fourth schematic diagram of the main view structure of the contact lens provided by this utility model.

[0090] Figure 37 This is the fifth schematic diagram of the main view structure of the contact lens provided by this utility model.

[0091] Figure 38 This is the sixth schematic diagram of the main view structure of the contact lens provided by this utility model.

[0092] Figure 39 This is the seventh schematic diagram of the main view structure of the contact lens provided by this utility model.

[0093] Figure 40 yes Figure 39 A schematic diagram of the tear channel structure.

[0094] Figure 41 This is the eighth schematic diagram of the main structure of the contact lens provided by this utility model.

[0095] Figure 42 This is the ninth schematic diagram of the main view structure of the contact lens provided by this utility model.

[0096] Figure 43 This is the tenth schematic diagram of the main structure of the contact lens provided by this utility model.

[0097] Figure 44 This is the eleventh schematic diagram of the main structure of the contact lens provided by this utility model.

[0098] Figure 45 This is the twelfth schematic diagram of the main view structure of the contact lens provided by this utility model.

[0099] Figure 46 This is one of the structural schematic diagrams of the tear channel provided by this utility model.

[0100] Figure 47This is the second schematic diagram of the tear channel provided by this utility model.

[0101] Figure 48 This is the third schematic diagram of the tear channel provided by this utility model.

[0102] Figure 49 This is the fourth schematic diagram of the tear channel provided by this utility model.

[0103] Reference numerals: 1. Central area; 2. Peripheral area; 3. Marker; 4. First sidewall; 5. Second sidewall; 6. Tear channel; 7. Port; 8. Anterior surface; 9. Rear surface; 10a. Contact lens; 10. Contrast-reducing area; 20. Transparent or partially transparent area; 30. Central area; 40. Substrate layer; 50. Functional layer; 60. Protective layer. Detailed Implementation

[0104] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0105] In this invention, the contact lens is preferably a soft corneal contact lens (i.e., a contact lens), and more preferably a colored contact lens. Alternatively, it can be a rigid corneal contact lens or a hybrid corneal contact lens, wherein the rigid corneal contact lens can be a rigid non-permeable corneal contact lens, a rigid permeable corneal contact lens, or an orthokeratology lens. Additionally, it can be a scleral contact lens. The following example uses a soft corneal contact lens (i.e., a contact lens), more preferably a colored contact lens, in conjunction with... Figures 1-27 The specific structure of the contact lens of this utility model is described.

[0106] like Figure 1 As shown, the contact lens includes a central region and a peripheral region surrounding the central region; the central region has multiple functional areas, including multiple contrast-reducing areas 10 and multiple transparent areas or partially transparent areas 20; the multiple contrast-reducing areas 10 and the multiple transparent areas or partially transparent areas 20 are arranged alternately along the circumference or radial direction of the central region, and the contrast-reducing areas 10 adjust the contrast of the image formed on the retina by the contact lens by changing at least one of their own pattern and color (the pattern and color of the contrast-reducing areas 10).

[0107] The contact lens provided by this utility model, due to its asymmetrical design of the functional areas, allows users to wear the same lens randomly every day, resulting in different relative positions of the pattern design on the functional areas and the cornea, thus randomly changing the stimulation position on the retina. Alternatively, users can wear lenses with different designs every day. Since the functional areas are divided into a contrast-reducing area 10 that can reduce retinal contrast, and a transparent area or partially transparent area 20, the transparent area or partially transparent area 20 can be undesigned or combined with a myopia defocus design, the stimulation position on the retina changes at any time, greatly delaying the appearance of "drug resistance" in the eyes. By combining the reduction of retinal contrast with the myopia defocus design, a better control effect can be achieved.

[0108] In one embodiment of this utility model, the functional areas are annular, and the widths of two adjacent annular areas can be the same or different. Furthermore, by way of example and not limitation, the width of a single annular area is not limited to maintaining the same width; its width value can gradually change along the circumference of the annular area; or, the width variation trends (i.e., the degree of change along a specific direction) of two adjacent annular functional areas are different. Multiple annular functional areas are concentrically arranged, meaning the centers of the multiple annular functional areas are at the same point. Preferably, the central area is circular, and the centers of the multiple annular functional areas and the center of the central area are at the same point. Multiple contrast-reducing areas 10 and multiple transparent areas or partially transparent areas 20 are arranged alternately radially along the central area; that is, along the radial direction of the central area, one of two adjacent contrast-reducing areas 10 is a contrast-reducing area 10, and the other is a transparent area or partially transparent area 20.

[0109] In one embodiment of this utility model, the central region 30 located in the central area is the contrast-reducing region 10, the central region 30 is circular, and the transparent or partially transparent region 20 located on the outer periphery is the vision correction region, and has a prescription optical power for vision correction.

[0110] In one embodiment of the present invention, the central region 30 located in the central area is a transparent region or a partially transparent region 20. At least the transparent region or partially transparent region 20 located in the central region 30 is a vision correction zone, that is, the transparent region or partially transparent region 20 located in the central region 30 is a vision correction zone, or the entire transparent region or partially transparent region 20 is a vision correction zone. The vision correction zone has a prescription optical power for correcting vision.

[0111] In one embodiment of the present invention, the central region 30 located in the central area is a transparent region or a partially transparent region 20, and at least the transparent region or partially transparent region 20 located in the central region 30 is a vision correction region, and the remaining transparent region or partially transparent region 20 is a peripheral defocus region, and the optical power of the peripheral defocus region is greater than that of the vision correction region.

[0112] In one embodiment of this invention, the central region 30 located in the central area is a transparent region or a partially transparent region 20, which serves as the vision correction zone. The contrast-reduced region 10 and the remaining transparent region or partially transparent region 20 are both peripheral defocus zones, with the optical power of the peripheral defocus zones being greater than that of the vision correction zone. The transparent region or partially transparent region 20 of the central region 30, as the vision correction zone, has its optical power customized according to the wearer's vision to ensure clear vision in the central region 30. The contrast-reduced region 10 and the remaining transparent region or partially transparent region 20 serve as peripheral defocus zones, with their optical power greater than that of the vision correction zone. By creating myopia-induced defocus on the peripheral retina, the effect of myopia prevention and control is achieved.

[0113] In one embodiment of this invention, the functional area is fan-shaped, with multiple contrast-reducing areas 10 and multiple transparent or partially transparent areas 20 arranged alternately along the circumference of the central area. This design creates an asymmetrical visual stimulus distribution in the circumference of the central area. Specifically, the fan-shaped contrast-reducing areas 10 adjust the contrast of the image formed on the retina by the contact lens by changing features such as patterns, colors, or geometric dimensions, thereby reducing retinal contrast. The transparent or partially transparent areas 20 can be undesigned or combined with a myopia defocus design to ensure that the position of retinal contrast reduction is different each time the lens is worn.

[0114] In one embodiment of this invention, at least two functional areas have different central angles; preferably, all sectors have different central angles. This design of different central angles further increases the diversity of visual stimulation, avoids eye adaptation to fixed patterns, and thus improves the effectiveness of myopia prevention and control.

[0115] In one embodiment of the present invention, the central region 30 located in the central area is a transparent region or a partially transparent region 20. The contrast-reduced region 10 and the remaining transparent region or partially transparent region 20 are both fan-shaped rings. The contrast-reduced region 10 and the remaining transparent region or partially transparent region 20 are arranged alternately around the central region 30 along the circumference of the central region.

[0116] In one embodiment of this invention, at least the transparent area or partially transparent area 20 located in the central region 30 serves as a vision correction zone and has a prescription optical power for correcting visual acuity. This design ensures that the contact lens provides clear vision correction in the central area, while simultaneously achieving myopia control through adjustment in the peripheral area. Specifically, the transparent area or partially transparent area 20 of the central region 30 serves as a vision correction zone, and its optical power is customized according to the wearer's visual condition to ensure clear central vision.

[0117] In one embodiment of this invention, the transparent area or partially transparent area 20 located in the central region 30 is a vision correction area with a prescription optical power for correcting visual acuity; the remaining transparent area or partially transparent area 20 is a peripheral defocus area, with an optical power greater than that of the vision correction area. The greater optical power of the peripheral defocus area, by forming myopic defocus on the peripheral retina, inhibits excessive elongation of the axial length. The peripheral defocus area and the contrast-reducing area 10 employ an asymmetrical design to avoid eye adaptation to fixed stimuli. This design ensures that the pattern design on the functional area is positioned differently relative to the cornea each time the device is worn, thus randomly changing the stimulation position on the retina and significantly delaying the development of eye "drug resistance."

[0118] In one embodiment of this invention, multiple functional areas located within the same annular region are all fan-shaped rings, and these functional areas are spaced apart circumferentially. This design allows the functional areas to form multiple independent visual stimulation regions circumferentially, increasing the diversity of visual stimulation. The distance between two adjacent functional areas can be the same or different, depending on the actual effect. The central angles corresponding to two adjacent functional areas can be the same or different.

[0119] In one embodiment of this utility model, the functional areas located in different annular regions have the same axis of symmetry, that is, the axis of symmetry of the functional areas located in different annular regions is the same straight line.

[0120] In one embodiment of this utility model, the sides of corresponding functional areas located within different annular regions are aligned on the same straight line. Specifically, as shown... Figure 14 As shown, five groups of functional areas are arranged along the annular area. Functional areas within the same group are distributed radially, and the left sides of functional areas within the same group are aligned on the same straight line. This arrangement helps ensure that the distribution of the contrast-reducing area 10 and the transparent area or partially transparent area 20 in the central area is both diverse and orderly, thereby reducing retinal contrast while avoiding unnecessary interference with vision.

[0121] In one embodiment of this utility model, multiple functional areas located within the same annular region have equal areas.

[0122] In one embodiment of this invention, the images of multiple reduced contrast regions 10 are identical.

[0123] In one embodiment of this invention, the patterns and colors of the plurality of contrast-reducing regions 10 are at least different. Variations in patterns may include different geometric shapes, line densities, texture styles, etc., while variations in color involve different color schemes, brightness, saturation, etc. By changing the patterns and colors of the different contrast-reducing regions 10, fine-tuning of retinal contrast can be achieved.

[0124] In one embodiment of this utility model, such as Figure 15 As shown, multiple functional areas are arranged sequentially along a spiral in the central area, so that multiple low-contrast areas 10 and multiple transparent areas or partially transparent areas 20 are arranged alternately along the radial direction of the central area, and at least one of the pattern, color and width of the low-contrast areas 10 varies along the length direction of the spiral.

[0125] It should be noted that the arrangement of multiple functional areas along a spiral in the central area means that two adjacent functional areas are set up close to each other.

[0126] It should also be noted that the side of the fan-shaped ring refers to the straight line segment connecting its inner and outer arcs.

[0127] In one embodiment of this invention, the transparent area or partially transparent area 20 of the central region 30 is a vision correction zone, and has a prescription optical power for vision correction. Through precise optical design, the vision correction zone can effectively correct myopia, ensuring accurate focusing of light on the retina, thereby providing a clear visual experience. The remaining transparent areas or partially transparent areas 20 surrounding the central region 30 are peripheral defocus zones. The optical power of the peripheral defocus zones is greater than that of the vision correction zones to avoid excessive defocus causing discomfort to the eyes.

[0128] In one embodiment of the present invention, the transparent area or partially transparent area 20 of the central region 30 located in the central area and the remaining transparent area or partially transparent area 20 surrounding the central region 30 are all vision correction areas with prescription optical power for correcting visual acuity.

[0129] In one embodiment of this invention, the central region 30 of the central area is a contrast-reducing region 10, and the remaining transparent or partially transparent regions 20 surrounding the central region 30 are vision correction zones with a prescription optical power for correcting visual acuity. This arrangement not only ensures that the wearer can obtain clear central vision during daily activities, but also further enhances the effect of myopia control by providing continuous vision correction in the peripheral areas. Simultaneously, since the entire transparent or partially transparent region 20 of the central area has vision correction functionality, it can also reduce focusing differences between different areas of the retina, avoiding visual fatigue and discomfort caused by inconsistent focusing.

[0130] In one embodiment of this utility model, the width of the functional area gradually increases, gradually decreases, increases and then decreases, decreases and then increases, increases and then decreases and then increases again, or decreases and then increases and then decreases again along the length direction of the spiral; by changing the width of the functional area, fine control of retinal contrast can be achieved.

[0131] In one embodiment of this utility model, the pattern of the reduced contrast region 10 is fixed along the length direction of the spiral.

[0132] In one embodiment of this invention, the transparent or partially transparent region 20 of the central region 30 is a vision correction zone with a prescription optical power for correcting vision; multiple contrast-reducing regions 10 are hexagonal regions surrounding the central region 30, with at least one difference in pattern and color between adjacent contrast-reducing regions 10. The multiple contrast-reducing regions 10 surrounding the central region 30 are set as hexagons because the arrangement of the hexagonal regions can closely and uniformly cover the remaining part of the central region, ensuring uniform light distribution. The fact that at least one difference in pattern and color between adjacent contrast-reducing regions 10 can change the optical properties of different regions, achieving fine control of retinal contrast.

[0133] In one embodiment of this utility model, the transparent area or the partially transparent area located in the central region 30 of the central area is a vision correction area and has a prescription optical power for vision correction; the contrast reduction area 10 and the remaining transparent area or the partially transparent area are both regular polygons, and the contrast reduction area 10 and the remaining transparent area or the partially transparent area form a regular polygon area around the central region 30. The regular polygon area is a peripheral defocus area, and the optical power of the peripheral defocus area is greater than the optical power of the vision correction area.

[0134] In one embodiment of this utility model, the remaining transparent area or the partially transparent area are all regular polygons and are vision correction areas with prescription optical power for correcting visual acuity.

[0135] In one embodiment of this utility model, such as Figures 25 to 27 As shown, the contact lens includes a substrate layer 40, a functional layer 50 and a protective layer 60 arranged sequentially along the thickness direction of the contact lens. The contrast-reducing region 10 is formed by the functional layer 50, and the transparent region or partially transparent region 20 is formed by the substrate layer 40 and the protective layer 60.

[0136] In one embodiment of the present invention, the central region 30 of the central area is provided with a vision correction area having a prescription optical power for correcting vision. When the central region 30 is circular, the diameter of the central region 30 is 1-2 mm; when the central region 30 is not circular, the diameter of the inscribed circle of the central region 30 is 1-2 mm.

[0137] In one embodiment of this utility model, the functional layer 50 serves to reduce retinal contrast. Both the protective layer 60 and the substrate layer 40 are transparent. The functional layer 50 is completely enclosed by the protective layer 60 and the substrate layer 40, ensuring the safety of the contact lens. The functional layer 50 has various different designs in terms of its position and range of action. Designed areas reduce retinal contrast, while undesigned areas are completely transparent or designed for myopia defocus. Each contact lens assembly contains several different designed contact lenses to ensure that the position of retinal contrast reduction is different each time the lens is worn.

[0138] The protective layer 60, functional layer 50, and substrate layer 40 of the contact lens are mainly composed of materials such as hydrogel and silicone hydrogel, which may or may not contain light-diffusing or refractive substances. The material composition is consistent or similar, and the structure between each layer is tight after polymerization without delamination. The functional layer 50 containing light-diffusing or refractive substances is completely encapsulated, and the light-diffusing or refractive substances are not exposed, which can ensure the safety of wearing the lens to the greatest extent.

[0139] The functional layer 50 of the contact lens is presented on the contact lens in the form of alternating patterns and transparent or partially transparent areas 20. The patterns are set for aesthetic purposes after wearing. The functional layer 50 has various designs in terms of its position and range of action, specifically in the form of alternating patterns and fully transparent areas or in a segmented and asymmetrical form. Combined with the rotation of the lens in the eye, it can achieve the purpose of partially reducing the contrast of the retina.

[0140] The pattern of the contrast-reducing region 10 is different for each contact lens in each contact lens assembly to ensure that the contact lens worn each day is different, thus varying the stimulation position. The pattern of the contrast-reducing region 10 serves to reduce retinal contrast, while the functional area has a completely transparent area without any design, which appears at varying intervals across the pattern to reduce retinal contrast and create a fully transparent interval.

[0141] The transparent area of ​​contact lenses can also incorporate a myopia defocus design, integrating retinal contrast reduction and defocusing on the same lens. These two different stimuli achieve better myopia control. The defocusing design in the transparent area of ​​contact lenses is typically below +5.0D, avoiding excessive defocus and contrast to reduce double overstimulation that may cause patient intolerance.

[0142] The contrast-reducing area 10 is spaced apart from the transparent area or partially transparent area 20. This area can cover the entire optical area of ​​the contact lens, or the entire lens, without a central pupil; alternatively, it can be distributed between the pupil and the optical area, with the pupil slightly smaller than the lens diameter. Preferably, the pupil size of the contact lens is between 2-3 mm, and the functional area of ​​the contact lens is slightly smaller than the lens diameter, specifically between 1-5 mm.

[0143] The light-diffusing or refractive material of the functional layer 50 can be particles of light-scattering and refractive materials such as conventional pigments of contact lenses, silicon dioxide, and titanium dioxide, with a particle diameter between 5-100 μm; the functional layer 50 can also be composed of polymers of materials with different refractive indices, such as the substrate layer 40 and the protective layer 60.

[0144] The contact lens provided by this utility model is similar to colored contact lenses. The wearing and care methods are the same as ordinary contact lenses. After wearing the lens, it can reduce the contrast of the retina. Its main function is to correct myopia while delaying the progression of myopia, supplementing the shortcomings of eyeglasses that reduce retinal contrast, and meeting the needs of more people with myopia.

[0145] The contrast-reducing region 10 and the transparent region or partially transparent region 20 of the contact lens provided by this utility model are arranged in an alternating pattern. The pattern, color, geometric size, effective position, and range of the contrast-reducing region 10 can be designed in various ways, specifically by alternating or dividing the contrast-reducing region 10 with the transparent region or partially transparent region 20, or by asymmetrical arrangement. When a user wears the lens, the contrast of the image formed on the retina varies each time the lens is worn because its position relative to the retina is different, thus resulting in different stimulation of the retina. Simultaneously, because the lens rotates to a certain extent in the eye while worn, the stimulation of the retina also varies, achieving the purpose of partially reducing retinal contrast.

[0146] In one specific embodiment of this utility model, such as Figure 1 As shown, the functional areas are arranged in a ring shape, with multiple ring-shaped functional areas concentrically arranged. Adjacent functional areas have the same width. Multiple contrast-reducing areas 10 and multiple transparent areas or partially transparent areas 20 are arranged alternately radially along the central area. The central area 30 of the central area is the contrast-reducing area 10, and the transparent areas or partially transparent areas 20 on the periphery are the vision correction areas, which have a prescription optical power for correcting vision.

[0147] like Figure 1 As shown, of course, the central area 30 located in the central region can also be a transparent area or a partially transparent area 20. The central area 30 is circular, and at least the transparent area or partially transparent area 20 located in the central area 30 is a vision correction area and has a prescription optical power for vision correction.

[0148] In another embodiment, the central region 30 located in the central area can be a transparent region or a partially transparent region 20. The transparent region or partially transparent region 20 located in the central region 30 is a vision correction zone, and the contrast-reduced region 10 and the remaining transparent region or partially transparent region 20 are both peripheral defocus zones. The optical power of the peripheral defocus zone is greater than that of the vision correction zone. The reason for adopting this arrangement is that, from the perspective of the manufacturing process of contact lenses, i.e., soft contact lenses, the remaining areas located radially outward are all peripheral defocus zones, which are easier to process.

[0149] In another embodiment, the central region 30 located in the central area may be a transparent region or a partially transparent region 20, at least the transparent region or partially transparent region 20 located in the central region 30 may be a vision correction region, and the remaining transparent region or partially transparent region 20 may be a peripheral defocus region, the optical power of the peripheral defocus region may be greater than the optical power of the vision correction region.

[0150] like Figure 2 As shown, in this embodiment, the central area 30 of the central region is the contrast-reducing area 10. Each contrast-reducing area 10 has the same pattern, and the transparent or partially transparent area 20 is the fully transparent area. The contrast-reducing areas 10 and the fully transparent areas appear in a ring shape and alternate radially. The ratio of the interval between the contrast-reducing areas 10 and the fully transparent areas on the lens can be 1:1 or any other arbitrary ratio to adjust the proportion of the contrast-reducing areas 10 and the fully transparent areas to the entire lens. The pattern can be a single style, and the contrast variation of each contact lens component is achieved by adjusting the density of the pattern. Of course, there can be multiple pattern styles, and the contrast variation of each contact lens component is achieved by adjusting the pattern styles. In another specific embodiment of this utility model, as... Figure 3 and Figure 4 As shown, the difference between this embodiment and the previous embodiment is that the pattern of each reduced contrast region 10 is different in this embodiment.

[0151] In another specific embodiment of this utility model, the functional area is fan-shaped, and multiple contrast-reducing areas 10 and multiple transparent areas or partially transparent areas 20 are arranged alternately along the circumference of the central area.

[0152] like Figure 5As shown, the central angles of the two sector-shaped reduced contrast regions 10 are different, but the patterns of each reduced contrast region 10 are the same.

[0153] like Figure 6 As shown, the central angles of the three sector-shaped reduced contrast regions 10 are all equal, and the pattern of each reduced contrast region 10 is the same. Of course, it is easy to understand that in this embodiment, the patterns of the three sector-shaped reduced contrast regions 10 can also be different.

[0154] like Figure 7 As shown, the central area 30 in the central region is a transparent area or a partially transparent area 20. The reduced contrast area 10 and the remaining transparent area or partially transparent area 20 are both fan-shaped rings. The reduced contrast area 10 and the remaining transparent area or partially transparent area 20 are arranged alternately around the central area 30 along the circumference of the central region. The central angles of the two fan-shaped reduced contrast areas 10 are different, and the patterns of each reduced contrast area 10 are the same.

[0155] like Figure 8 and Figure 9 As shown, the central area 30 in the central region is a transparent area or a partially transparent area 20. The reduced contrast area 10 and the remaining transparent area or partially transparent area 20 are both fan-shaped rings. The reduced contrast area 10 and the remaining transparent area or partially transparent area 20 are arranged alternately around the central area 30 along the circumference of the central region. The central angles of the two fan-shaped reduced contrast areas 10 are different, and the patterns of each reduced contrast area 10 are different.

[0156] like Figure 10 As shown, the central area 30 in the central region is a transparent area or a partially transparent area 20. The reduced contrast area 10 and the remaining transparent area or partially transparent area 20 are both fan-shaped rings. The reduced contrast area 10 and the remaining transparent area or partially transparent area 20 are arranged alternately around the central area 30 along the circumference of the central region. The central angles of the fan-shaped reduced contrast area 10 and the fan-shaped remaining transparent area or partially transparent area 20 are equal, and the pattern of each reduced contrast area 10 is different.

[0157] like Figure 11 As shown, the central area 30 of the central area is a transparent area or a partially transparent area 20. The reduced contrast area 10 and the remaining transparent area or partially transparent area 20 are both fan-shaped rings. The reduced contrast area 10 and the remaining transparent area or partially transparent area 20 are arranged alternately around the central area 30 along the circumference of the central area. The central angles of the fan-shaped reduced contrast area 10 and the fan-shaped remaining transparent area or partially transparent area 20 are equal, and the pattern of each reduced contrast area 10 is the same.

[0158] like Figure 12 As shown, the central area 30 of the central area is a transparent area or a partially transparent area 20. The reduced contrast area 10 and the remaining transparent area or partially transparent area 20 are both fan-shaped rings. The reduced contrast area 10 and the remaining transparent area or partially transparent area 20 are arranged alternately around the central area 30 along the circumference of the central area. The central angles of the fan-shaped reduced contrast area 10 and the fan-shaped remaining transparent area or partially transparent area 20 are different, and the patterns of the partially reduced contrast area 10 are the same.

[0159] like Figure 13 As shown, multiple functional areas are fan-shaped rings, with multiple functional areas within the same ring area spaced circumferentially, and corresponding functional areas within different ring areas sharing the same axis of symmetry. The patterns of the multiple low-contrast areas 10 located within the same ring area and / or different ring areas are all different.

[0160] like Figure 14 As shown, multiple functional areas are fan-shaped rings. Multiple functional areas within the same ring area are spaced apart circumferentially. The sides of corresponding functional areas within different ring areas are aligned on the same straight line. Within the same ring area, the patterns of the contrast-reducing areas formed by two adjacent fan-shaped rings are different. The patterns of the contrast-reducing areas formed by two spaced-apart fan-shaped rings may be the same or different, preferably different.

[0161] like Figure 15 As shown, multiple functional areas are arranged sequentially along a spiral in the central area, so that multiple contrast-reducing areas 10 and multiple transparent areas or partially transparent areas 20 are arranged alternately along the radial direction of the central area. The transparent areas or partially transparent areas 20 located in the central area 30 are vision correction areas and have a prescription optical power for vision correction. The patterns of the contrast-reducing areas 10 are all the same, and the width of the contrast-reducing areas 10 gradually increases and then gradually decreases along the length direction of the spiral.

[0162] like Figure 16 As shown, multiple functional areas are arranged sequentially along a spiral in the central area, so that multiple contrast-reducing areas 10 and multiple transparent areas or partially transparent areas 20 are arranged alternately along the radial direction of the central area. The transparent areas or partially transparent areas 20 located in the central area 30 are vision correction areas and have a prescription optical power for vision correction. The patterns of the contrast-reducing areas 10 are all the same, and the width of the contrast-reducing areas 10 first increases rapidly and then gradually decreases slowly along the length direction of the spiral.

[0163] like Figure 17As shown, multiple functional areas are arranged sequentially along a spiral in the central area, so that multiple contrast-reducing areas 10 and multiple transparent areas or partially transparent areas 20 are arranged alternately along the radial direction of the central area. The area located in the central area 30 is the contrast-reducing area 10. The patterns of the contrast-reducing areas 10 are all the same, and the width of the contrast-reducing areas 10 gradually decreases along the length direction of the spiral.

[0164] like Figure 18 As shown, multiple functional areas are arranged sequentially along a spiral in the central area, so that multiple contrast-reducing areas 10 and multiple transparent areas or partially transparent areas 20 are arranged alternately along the radial direction of the central area. The transparent area or partially transparent area 20 located in the central area 30 is a vision correction area and has a prescription optical power for vision correction. The color of the contrast-reducing area 10 gradually changes along the length of the spiral (its color distribution is blue-dark blue-gray yellow-yellow, etc. as the spiral degree increases; the color description here only describes its trend and is not limited to this). The width of the contrast-reducing area 10 first increases rapidly and then gradually decreases slowly along the length of the spiral.

[0165] like Figure 19 As shown, multiple functional areas are arranged sequentially along a spiral in the central area, so that multiple contrast-reducing areas 10 and multiple transparent areas or partially transparent areas 20 are arranged alternately along the radial direction of the central area. The transparent area or partially transparent area 20 located in the central area 30 is the vision correction area and has a prescription optical power for vision correction. The color of the contrast-reducing area 10 gradually changes along the length of the spiral (its color distribution is yellow-grayish-dark blue-blue, etc. as the spiral degree increases; the color description here only describes its trend and is not limited to this). The width of the contrast-reducing area 10 first slowly increases and then gradually decreases along the length of the spiral.

[0166] like Figure 20 As shown, multiple functional areas are arranged sequentially along a spiral in the central area, so that multiple contrast-reducing areas 10 and multiple transparent areas or partially transparent areas 20 are arranged alternately along the radial direction of the central area. The area located in the central area 30 is the contrast-reducing area 10. The color of the contrast-reducing area 10 gradually changes along the length of the spiral (its color distribution is blue-dark blue-grayish yellow-yellow, etc. as the spiral degree increases; the color description here only describes its trend and is not limited to this). The width of the contrast-reducing area 10 gradually decreases along the length of the spiral.

[0167] like Figure 21As shown, the transparent or partially transparent area 20 of the central region 30 is a vision correction area and has a prescription optical power for correcting vision; the multiple contrast-reducing areas 10 are regular hexagonal areas surrounding the central region 30 and partially equilateral triangular areas surrounding the central region 30. The patterns of two adjacent regular hexagonal contrast-reducing areas 10 are different, and the patterns of two adjacent equilateral triangular contrast-reducing areas 10 are the same. Further, in addition to the multiple triangular areas surrounding the central region 30, preferably, the patterns of the three regular hexagonal contrast-reducing areas 10 surrounding these remaining triangular areas are all different.

[0168] like Figure 22 As shown, the transparent area or partially transparent area 20 located in the central region 30 is the vision correction area and has a prescription optical power for correcting vision. The contrast-reducing area 10 and the remaining transparent area or partially transparent area 20 are both regular polygons (preferably regular hexagons). The patterns of each contrast-reducing area 10 are identical (or different). The contrast-reducing area 10 and the remaining transparent area or partially transparent area 20 form a regular polygonal area around the central region 30. This is not a limitation, but rather an example of a regular polygonal area, which is a peripheral defocus area. The optical power of the peripheral defocus area is greater than that of the vision correction area. The preferred regular hexagonal shape mentioned in this embodiment...

[0169] like Figure 23 As shown, the transparent area or partially transparent area 20 located in the central region 30 is the vision correction area and has a prescription optical power for vision correction; the contrast reduction area 10 is located on the outer periphery of the central region 30 and is formed by several dot matrix patterns in two dispersion modes, dense and sparse, and these two arrangement modes are set at intervals along the radial and circumferential directions.

[0170] like Figure 24 As shown, the transparent area or partially transparent area 20 located in the central region 30 is the vision correction area and has a prescription optical power for vision correction; the contrast reduction area 10 is located on the outer periphery of the central region 30 and is formed by a plurality of dot matrix patterns, and their arrangement density gradually changes radially. In this embodiment, the arrangement density gradually decreases radially from the inside to the outside. It is easy to understand that, in other embodiments, the arrangement density can also gradually increase radially from the inside to the outside.

[0171] This utility model also provides a contact lens assembly, which includes a plurality of contact lenses as described in any of the above embodiments. The functional areas of two adjacent contact lenses are different. When worn, two adjacent contact lenses form a wearing assembly to produce different stimuli to the retina.

[0172] The contact lens assembly includes at least two extraocular contact lenses as described above. Specifically, the number of contact lenses in the assembly can be 2 to 365 or 2 to 7. Preferably, the contact lenses are contact lenses. The contact lenses are daily disposable, weekly disposable, bi-monthly disposable, monthly disposable, quarterly disposable, semi-annual disposable, or yearly disposable. Preferably, the contact lenses are daily disposable.

[0173] Additionally, it should be noted that in all embodiments of this utility model, [the following is specifically addressed]: Figure 1 , Figure 2 , Figure 7-16 , Figure 18-19 , Figure 21-24 In this embodiment, the transparent or partially transparent areas 20 of the central region 30 located in the central area serve as vision correction zones. The contrast-reducing areas 10 located radially outward from the central region 30, regardless of their arrangement, have an inner diameter L adjacent to the central region 30 that satisfies: L = k2 * (D - k1), where the lens diameter D = 12-16 mm, k1 is a constant of 8-11, and k2 is a constant of 0.2-0.8. Preferably, D = 13-14 mm, k1 = 9-10, and k2 = 0.4-0.6. This reliably ensures that the light flux is regulated by the contrast-reducing areas 10 when the pupil is in normal conditions or when it becomes smaller or larger due to strong or weak light, effectively controlling the contrast or color sensitivity on the retina and thus effectively preventing myopia.

[0174] In another specific embodiment of this utility model, such as Figure 28 and Figure 29 As shown, the contact lens 10a has a central region 1 and a peripheral region 2, the central region 1 having any of the structures described above. The peripheral region 2 is located on the outer periphery of the central region 1 and is annular. The contact lens 10a has a posterior surface 9 facing the cornea of ​​the human eye. Figure 28 The lower surface of the middle contact lens 10a) and the anterior surface 8 away from the human cornea ( Figure 28 The upper surface of the contact lens 10a. The contact lens 10a has a tear channel 6 (shown by the shaded line in the figure). The tear channel 6 extends radially along the rear surface 9 or the front surface 8 of the contact lens 10a, allowing tears to flow into the tear channel 6 from one end near the geometric center. Under the action of fluid dynamics, a force is generated on the contact lens 10a along the direction of the front surface 8 or the rear surface 9, causing the contact lens 10a to rotate. This allows the dynamic defocus performance of the contact lens 10a to be better utilized, thereby improving the myopia control effect.

[0175] With this structure, when wearing contact lens 10a, tears usually flow from the edge of contact lens 10a to the geometric center of contact lens 10a. This flow is based on natural physiological function and is a continuous process, not entirely dependent on blinking. Therefore, whether it is day or night, whether the wearer is working, studying or in a state of eye use, or in a state of sleep or rest (including any rest time such as lunch break), the flow of tears can be used to rotate contact lens 10a, thereby improving the applicability of contact lens 10a technology.

[0176] Furthermore, the force generated by tears is gentler than that of the eyelids, thus allowing the contact lens 10a to rotate more stably and slowly, improving the safety of wearing it.

[0177] Furthermore, the cross-sectional area or width of the tear channel 6 can gradually change from one end to the other, thereby promoting hydrodynamics and enabling the contact lens 10a to rotate more reliably and stably. The dimension of the tear channel 6 extending along the rear surface 9 or the front surface 8 is called the length, the dimension in the thickness direction of the contact lens 10a is called the height, and the dimension in the direction perpendicular to the length direction of the tear channel 6 is called the width.

[0178] In this embodiment, the tear channel 6 has an opening on its rear surface 9, thereby forming a groove-like structure. Tear fluid flows into the groove-like structure through the opening and along the groove-like structure. By forming a groove-like structure with an opening, the thickness of the contact lens 10a can be effectively utilized to increase the volume of the tear channel 6, enhance the hydrodynamic effect, and enable the contact lens 10a to rotate reliably. At the same time, this design also facilitates the processing of the contact lens 10a.

[0179] The radially outer end of the tear channel 6 is located at the edge of the contact lens 10a. A port 7 communicating with the tear channel 6 is located at the edge of the contact lens 10a at the end of the tear channel 6, allowing tears to flow into the tear channel 6 from the port 7, thus generating a large rotational torque. It should be noted that the tear channel 6 is located in the peripheral region 2 of the central region 1, which helps to suppress any adverse effects on the optical properties of the central region 1.

[0180] like Figure 28 and Figure 29 As shown, the tear channel 6 extends from the radially outer side (outer peripheral side) to the radially inner side (inner peripheral side or central side), which can accommodate the radial flow of tears and enable the tear flow to reliably exert force on the contact lens 10a.

[0181] Because the central zone 1 has asymmetrical defocus optical characteristics, and the contact lens 10a rotates under the action of its self-rotating structure, the myopia defocus signal changes in the 360-degree direction (circumferential direction). This causes variations in the stimulation received at different locations on the retina, preventing the effective stimulation received by the human eye from gradually weakening under the long-term action of a fixed signal (that is, preventing the human eye from developing "drug resistance" to the defocus signal). With this design, the contact lens 10a itself can slowly rotate under the action of tear film. In this way, the defocus signal stimulation received at different locations on the retina will change cyclically with the rotation of the contact lens 10a, thereby achieving a long-term myopia control effect and breaking "drug resistance".

[0182] It should be noted that the front-to-back direction can also be referred to as the optical axis direction (the direction perpendicular to the axis of the front surface 8 or rear surface 9 at the center of the contact lens 10a). In this embodiment, the central area 1 is circular, but the shape of the central area 1 is not limited to this; it can also be elliptical or other shapes. To promote tear flow, a through-hole penetrating the contact lens in the thickness direction can be provided on the contact lens to improve tear flow, for example, a through-hole can be provided in the central area 1 or the peripheral area 2.

[0183] like Figure 28 and Figure 29 As shown, in this embodiment, the contact lens is a daily wear contact lens, such as a regular contact lens. The contact lens is provided with two tear channels 6. Of course, the number of tear channels 6 is not limited to this; it can also be provided with only one, or three or more.

[0184] In another specific embodiment of this utility model, such as Figure 30 and Figure 31 As shown, the difference between this embodiment and the above embodiment is that the tear channel 6 is entirely inside the contact lens, that is, the tear channel 6 does not form an opening on the front surface 8 or the rear surface 9 of the contact lens, that is, the tear channel 6 is a closed channel.

[0185] The tear channel 6 is located in the peripheral region 2 of the contact lens. The tear channel 6 is closed on the inner (or outer) surface of the contact lens. The end of the tear channel 6 furthest from the geometric center has a port 7, located on the end face of the outer peripheral edge of the contact lens. The end of the tear channel 6 closest to the geometric center is closed; however, the end of the tear channel 6 closest to the geometric center can also have a port 7. Tears flow into the tear channel 6 through the port 7, causing the contact lens to rotate, thus achieving the same technical effect as the above-described embodiment, which will not be described in detail here.

[0186] In another specific embodiment of this utility model, a closed channel can be formed by stacking two substrates together. In this case, one or both of the two opposing surfaces of the two substrates have grooves, and the two substrates can be joined together to form a closed channel. If the contact lens is a contact lens, it can be integrally molded by molding. The male mold and female mold correspond to the rear surface 9 and front surface 8 of the lens, and the insert corresponds to the channel portion. After liquid injection curing, the mold and insert can be removed.

[0187] In another specific embodiment of this utility model, such as Figure 32 and Figure 33 As shown, the contact lens has a tear channel 6 in the peripheral region 2. The tear channel 6 extends radially from the outer peripheral edge of the contact lens to the edge of the central region 1, and is partially crescent-shaped when viewed from the front-back direction. Specifically, the tear channel 6 has a first sidewall 4 and a second sidewall 5 disposed opposite each other. Both the first sidewall 4 and the second sidewall 5 extend along the length of the tear channel 6. The distance between the first sidewall 4 and the second sidewall 5 gradually decreases in the radially inward direction. The first sidewall 4 and the second sidewall 5 have the same curvature, and the curvature of the first sidewall 4 is greater than that of the second sidewall 5, thus making the tear channel 6 partially crescent-shaped.

[0188] Figure 33 The first sidewall 4, which has a greater degree of curvature, is located counterclockwise from the second sidewall 5, thus facilitating the contact mirror's orientation. Figure 33 The contact mirror rotates clockwise; that is, by setting the first sidewall 4 and the second sidewall 5 to different degrees of curvature, the rotation direction of the contact mirror can be controlled.

[0189] In this embodiment, the tear channel 6 can be an open channel (i.e., an opening communicating with the tear channel 6 is provided on the front surface 8 or the rear surface 9 of the contact lens) or a closed channel. When the tear channel 6 is an open channel, the two ends of the tear channel 6 have ports 7 (i.e., a radially inner port 7 and a radially outer port 7), and the tear channel 6 extends in a curved manner so that the two ports 7 are located at different positions in the circumferential direction.

[0190] In this embodiment, the first sidewall 4 and the second sidewall 5 bend in the same direction, and the distance between the first sidewall 4 and the second sidewall 5 gradually decreases in the radial inward direction. Of course, the tear channel 6 can also have one or two sidewalls extending in a straight line, and their extension direction can be completely consistent with the radial direction, or it can extend at an angle relative to the radial direction.

[0191] In another specific embodiment of this utility model, such as Figures 34 to 37 As shown, the difference from the above embodiment is that, Figure 34 The contact lens has two tear channels. Figure 35The contact lens has three tear channels. Figure 36 The contact lens has four tear channels. Figure 37 The contact lens has six tear channels 6, which are evenly spaced in the circumferential direction. Of course, the distribution of the tear channels 6 is not limited to this and can also be uneven.

[0192] In another specific embodiment of this utility model, such as Figure 38 As shown, the difference between this embodiment and the above embodiment is that the bending direction of the tear channel 6 is different. Specifically, among the two side walls of the tear channel 6 arranged opposite each other in the circumferential direction, the bending degree of the side wall in the clockwise direction is greater than that of the side wall in the counterclockwise direction. That is, the bending degree of the right side wall is greater than that of the left side wall, so that the contact lens can be rotated in the counterclockwise direction.

[0193] In another specific embodiment of this utility model, such as Figure 39 and Figure 40 As shown, the difference between this embodiment and the previous embodiment lies in the shape of the tear channel 6. In this embodiment, the tear channel 6 is V-shaped. Specifically, the contact lens has a tear channel 6 in the peripheral region 2. The tear channel 6 extends from the edge of the contact lens towards the defocused area and then away from the defocused area; that is, the tear channel 6 extends radially outward to radially inward and then folds back to extend radially outward, thus forming a V-shaped tear channel 6. Tears flow into the tear channel 6 through the port 7, causing the contact lens to rotate under the action of fluid dynamics. Of course, the shape of the tear channel 6 is not limited to V-shape; it can also be C-shaped or U-shaped.

[0194] In another specific embodiment of this utility model, the tear channel 6 extends from the outer peripheral edge of the contact lens to the outer peripheral edge of the central region 1, or extends to the junction of the peripheral region 2 and the central region 1, thereby forming a channel as long as possible so that the contact lens can rotate.

[0195] In another specific embodiment of this utility model, such as Figure 40 As shown, the tear channel 6 has two ports 7 at different positions on the outer peripheral edge of the contact lens. The cross-sectional area or cross-sectional width of the tear channel 6 gradually decreases from one end to the other, thereby enhancing the force exerted on the contact lens and reliably causing the contact lens to rotate.

[0196] The cross-sectional area or width of the tear channel 6 gradually decreases from the counterclockwise end to the clockwise end, that is, from the left end to the right end, thus allowing the contact lens to rotate clockwise. The larger portion of the cross-sectional area or width is located on the counterclockwise side, and the smaller portion is located on the clockwise side, which enables the contact lens to rotate clockwise.

[0197] In another specific embodiment of this utility model, such as Figure 41 and Figure 44 As shown, the difference between this embodiment and the above embodiments is that... Figure 41 The contact lens has two tear channels. Figure 42 The contact lens has three tear channels. Figure 43 The contact lens has four tear channels. Figure 44 The contact lens has six tear channels 6, which are evenly spaced in the circumferential direction. Of course, the distribution of the tear channels 6 is not limited to this and can also be uneven.

[0198] In another specific embodiment of this utility model, such as Figure 45 As shown, the difference between this embodiment and the previous embodiment lies in the direction of change of the cross-sectional area or cross-sectional width of the tear channel 6. Specifically, the tear channel 6 has two ends at the outer peripheral edge of the contact lens, and the cross-sectional area or cross-sectional width of the tear channel 6 gradually decreases from the clockwise end to the counterclockwise end. This arrangement allows the contact lens to rotate counterclockwise. The cross-section of the tear channel 6 is square, triangular, circular, or regular pentagonal.

[0199] In another specific embodiment of this utility model, such as Figure 46 As shown, the difference between this embodiment and the above embodiment is that the cross-sectional area or cross-sectional width of the tear channel 6 in this embodiment changes in stages, presenting a stepped shape with stepped end faces.

[0200] In another specific embodiment of this utility model, such as Figure 47 As shown, the difference between this embodiment and the above embodiment is that the cross-sectional area or cross-sectional width of the tear channel 6 in this embodiment changes in stages, presenting a stepped shape with stepped end faces.

[0201] In another specific embodiment of this utility model, such as Figure 48 As shown, the difference between this embodiment and the above embodiment is that the cross-sectional area or cross-sectional width of the tear channel 6 in this embodiment changes continuously along the length direction of the tear channel 6.

[0202] In another specific embodiment of this utility model, such as Figure 49 As shown, the difference between this embodiment and the above embodiment is that the cross-sectional area or cross-sectional width of the tear channel 6 in this embodiment changes in stages, presenting a stepped shape with a transition slope.

[0203] The contact lens of this invention is not limited to contact lenses and orthokeratology lenses. The contact lens can be a scleral contact lens or a corneal contact lens. The corneal contact lens can be a soft corneal contact lens, a rigid corneal contact lens, or a hybrid corneal contact lens. Rigid corneal contact lenses include rigid non-permeable corneal contact lenses, rigid permeable corneal contact lenses, or orthokeratology lenses. Preferably, the contact lens is a soft contact lens, and more preferably, a soft colored contact lens.

[0204] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A contact lens, characterized by, It includes a central area and a peripheral area surrounding the central area; the central area has multiple functional areas, including multiple contrast-reducing areas and multiple transparent areas or partially transparent areas; the multiple contrast-reducing areas and the multiple transparent areas or partially transparent areas are arranged alternately along the circumference or radial direction of the central area, and the contrast-reducing areas adjust the contrast of the image formed on the retina by the contact lens by changing at least one of their own pattern and color.

2. The contact lens of claim 1, wherein, The functional area is in the shape of a ring, and multiple ring-shaped functional areas are arranged concentrically. Multiple contrast-reducing areas and multiple transparent areas or partially transparent areas are arranged alternately along the radial direction of the central area.

3. The contact lens of claim 2, wherein, The central region of the central area is the contrast-reducing region, and the transparent region or the partially transparent region on the periphery is the vision correction region, and has a prescription optical power for correcting vision.

4. The contact lens of claim 2, wherein, The transparent area or the partially transparent area located in the center of the central region is the transparent area or the partially transparent area. The transparent area or the partially transparent area located in the central region is the vision correction area and has a prescription optical power for correcting vision.

5. The contact lens of claim 2, wherein, The central area of ​​the central region is the transparent area or the partially transparent area. The transparent area or partially transparent area located at least in the central region is the vision correction area. The remaining transparent area or partially transparent area is the peripheral defocus area. The optical power of the peripheral defocus area is greater than that of the vision correction area.

6. The contact lens of claim 2, wherein, The central area of ​​the central region is the transparent area or the partially transparent area. The transparent area or the partially transparent area in the central region is the vision correction area. The contrast reduction area and the remaining transparent area or the partially transparent area are both peripheral defocus areas. The optical power of the peripheral defocus area is greater than that of the vision correction area.

7. The contact lens of any one of claims 1 to 6, wherein, The functional area is fan-shaped, and multiple contrast-reducing areas and multiple transparent areas or partially transparent areas are arranged alternately along the circumference of the central area.

8. The contact lens of claim 7, wherein, At least two of the functional areas have different central angles.

9. The contact lens of claim 7, wherein, The transparent area or the partially transparent area is located in the center of the central area. The reduced contrast area and the remaining transparent area or partially transparent area are both fan-shaped rings. The reduced contrast area and the remaining transparent area or partially transparent area are arranged alternately around the central area along the circumference of the central area.

10. The contact lens of claim 9, wherein, The transparent area or the partially transparent area located at least in the central region is a vision correction zone and has a prescription optical power for correcting vision.

11. The contact lens of claim 9, wherein, The transparent area or the partially transparent area located in the central region is a vision correction area and has a prescription optical power for correcting vision; the remaining transparent areas or the partially transparent areas are all peripheral defocus areas, and the optical power of the peripheral defocus areas is greater than that of the vision correction area.

12. The contact lens of any one of claims 1 to 6, wherein, The multiple functional areas located within the same annular area are all fan-shaped rings, and the multiple functional areas located within the same annular area are arranged at intervals along the circumference.

13. The contact lens of claim 12, wherein, The functional areas located in different annular regions have the same axis of symmetry.

14. The contact lens of claim 12, wherein, The sides of the functional areas located in different annular regions are on the same side and are on the same straight line.

15. The contact lens of claim 12, wherein, The areas of the multiple functional areas located within the same annular region are equal.

16. The contact lens of claim 12, wherein, The images of multiple areas with reduced contrast are identical.

17. The contact lens of claim 12, wherein, The patterns and colors of the multiple reduced contrast areas are different in at least one aspect.

18. The contact lens of claim 12, wherein, Multiple functional areas are arranged sequentially along a spiral within the central region, such that multiple contrast-reducing areas and multiple transparent areas or partially transparent areas are arranged alternately along the radial direction of the central region, and at least one of the pattern, color, and width of the contrast-reducing areas varies along the length direction of the spiral.

19. The contact lens of claim 18, wherein, The transparent area or the partially transparent area located in the central region of the central area is a vision correction area and has a prescription optical power for correcting vision; the remaining transparent areas or the partially transparent areas surrounding the central region are all peripheral defocus areas, and the optical power of the peripheral defocus areas is greater than that of the vision correction area.

20. The contact lens of claim 18, wherein, The transparent area or the partially transparent area located in the central region of the central area, as well as the remaining transparent area or the partially transparent area surrounding the central region, are all vision correction zones with a prescription optical power for correcting visual acuity.

21. The contact lens of claim 18, wherein, The central region of the central area is the contrast-reduced region, and the remaining transparent regions or partially transparent regions surrounding the central region are all vision correction zones with a prescription optical power for correcting visual acuity.

22. The contact lens of claim 18, wherein, The width of the functional area gradually increases, gradually decreases, increases and then decreases, decreases and then increases, increases and then decreases and then increases again, or decreases and then increases and then decreases again along the length of the spiral.

23. The contact lens of claim 18, wherein, The pattern in the area with reduced contrast remains fixed along the length of the spiral.

24. The contact lens according to any one of claims 1 to 6, characterized in that, The transparent area or the partially transparent area located in the central region of the central area is a vision correction area and has a prescription optical power for correcting vision; the plurality of the reduced contrast areas are regular hexagonal areas surrounding the central region, and at least one of the patterns and colors of two adjacent reduced contrast areas are different.

25. The contact lens of claim 24, wherein, The transparent area or the partially transparent area located in the central region of the central area is a vision correction area and has a prescription optical power for correcting vision; the reduced contrast area and the remaining transparent area or the partially transparent area are both regular polygons, and the reduced contrast area and the remaining transparent area or the partially transparent area form a regular polygon area around the central region. The regular polygon area is a peripheral defocus area, and the optical power of the peripheral defocus area is greater than the optical power of the vision correction area.

26. The contact lens of claim 24, wherein, The remaining transparent areas or the partially transparent areas are all regular polygons and are vision correction areas with a prescription optical power for correcting visual acuity.

27. The contact lens of any one of claims 1 to 6, wherein, The contact lens includes a substrate layer, a functional layer, and a protective layer arranged sequentially along the thickness direction of the contact lens. The area with reduced contrast is formed by the functional layer, and the transparent area or the partially transparent area is formed by the substrate layer and the protective layer.

28. The contact lens of any one of claims 1 to 6, wherein, The central area of ​​the central region is provided with a vision correction zone with a prescription optical power for correcting visual acuity. When the central region is circular, the diameter of the central region is 1-2 mm; when the central region is non-circular, the diameter of the inscribed circle of the central region is 1-2 mm.

29. The contact lens of claim 5 or 6, wherein, The peripheral area is provided with a self-rotating structure for automatically rotating the contact lens.

30. The contact lens of claim 29, wherein, The self-rotating structure includes a tear channel disposed in the peripheral region, the tear channel being located on the front or rear surface of the contact lens, the tear channel extending radially along the contact lens, and the structure of the tear channel having at least one of the following: The cross-sectional area or cross-sectional width of the tear channel gradually decreases from the first end to the second end of the tear channel; At least one of the first and second ends of the tear channel forms a port at the edge of the contact lens; The first and second ends of the tear channel are located at different positions in the circumferential direction of the contact lens; The tear channel extends from the edge of the contact lens first toward the peripheral defocus area, and then toward the area away from the peripheral defocus area.

31. The contact lens of claim 30, wherein, When the tear channel extends from the edge of the contact lens first toward the peripheral defocus area and then toward the area away from the peripheral defocus area, the structure of the tear channel has at least one of the following characteristics: The tear channel is V-shaped, C-shaped, or U-shaped; The tear channel has opposing first and second sidewalls, both of which extend along the length of the tear channel; preferably, the first and second sidewalls have the same curvature, and the curvature of the first sidewall is greater than that of the second sidewall.

32. The contact lens of claim 30, wherein, The self-rotating structure includes multiple tear channels, and the tear channels have at least one of the following structures: Multiple tear channels are arranged at circumferential intervals along the contact lens; At least a portion of the tear channel is a groove-like structure disposed on the rear surface of the contact lens; At least a portion of the tear channel is located inside the contact lens; The cross-sectional area or cross-sectional width of the tear channel varies continuously or in stages along the length of the tear channel; At least a portion of the tear channel extends radially along the contact lens; At least a portion of the tear channel has a cross-sectional area or cross-sectional width that gradually decreases in the radial inward direction along the contact mirror.

33. The contact lens of claim 1, wherein, The contact lens is a scleral contact lens or a corneal contact lens. The corneal contact lens is a soft corneal contact lens, a rigid corneal contact lens, or a hybrid corneal contact lens. The rigid corneal contact lens is a rigid non-permeable corneal contact lens, a rigid permeable corneal contact lens, or an orthokeratology lens.

34. A contact lens assembly characterized by, The contact lens set comprises at least two contact lenses, and the contact lenses are daily disposable, weekly disposable, semi-monthly disposable, monthly disposable, quarterly disposable, semi-annual disposable or annual disposable.

35. The contact lens assembly of claim 34, wherein, The contact lens set comprises at least two contact lenses, and the contact lenses are daily disposable, weekly disposable, semi-monthly disposable, monthly disposable, quarterly disposable, semi-annual disposable or annual disposable.

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