Extraocular wearing contact lens and extraocular wearing contact lens assembly

Abstract

The utility model provides an extraocular wearing contact lens and an extraocular wearing contact lens assembly, and relates to the technical field of ophthalmic optics. An optical part of the contact lens is provided with a geometric center, the optical part comprises a central correction area with the geometric center as the circle center and a defocus area arranged on the periphery of the central correction area in a surrounding mode, the central correction area has prescription focal power for correcting vision, and the prescription focal power is matched with the degree, needing to be corrected, of a wearer; the focal power of the defocus area is larger than or equal to the focal power of the central correction area, and the distribution trends of the focal power of at least two angles of the defocus area along the radius are different. According to the extra-ocular wearing contact lens provided by the utility model, focal power distribution can be changed along different angles through a single contact lens, and dynamic defocus can be formed through a group of contact lens assemblies and setting different relative positions of the defocus area and the vertical weight part, so that effective stimulation obtained at each position on the retina is improved, and the retina can be effectively stimulated. The myopia prevention and control effect can be enhanced.

Description

Technical Field

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

[0002] Current contact lenses for myopia control only move slightly up and down during wear. However, the myopia defocus signal or sensitivity received by the human retina is fixed in 360 degrees. This results in the stimulation received by different positions on the retina being constant. Under the long-term effect of this fixed signal, the effective stimulation received by the human eye will gradually weaken. In other words, the human eye develops "resistance" to contrast sensitivity or defocus signal, which is not conducive to myopia control and easily leads to poor myopia control results. Utility Model Content

[0003] This invention provides an external contact lens to address the problem of poor myopia control in existing technologies.

[0004] This invention provides an external contact lens. The optical part of the contact lens has a geometric center. The optical part includes a central correction zone centered on the geometric center and a defocus zone surrounding the central correction zone. The central correction zone has a prescription optical power for correcting visual acuity, and the prescription optical power is adapted to the degree of correction required by the wearer. The optical power of the defocus zone is greater than or equal to the optical power of the central correction zone, and the optical power of the defocus zone has different radial distribution trends at at least two angles.

[0005] According to the present invention, an external contact lens is provided, wherein the diameter of the optical part is 7-12mm and the diameter of the central correction zone is 1.5-3.5mm.

[0006] According to the present invention, for an external contact lens, within the annular width of the defocus zone, the optical power variation curve with angle on the circumference corresponding to any radius r is provided. Continuously differentiable, where θ∈[0°, 360°), r∈(D1 / 2, D2 / 2], D1 is the inner diameter of the defocused region, and D2 is the outer diameter of the defocused region.

[0007] According to the present invention, an external contact lens is provided, wherein the defocus area has a non-continuous curve of optical power versus radius at at least one angle.

[0008] According to the present invention, the optical power at any angle of the defocus area gradually increases with the radius, or the rate of change of the optical power at any angle of the defocus area with the radius is continuous and first increases and then decreases, and the rate of change is not 0.

[0009] According to the present invention, the optical power at any angle of the defocus area gradually increases with the radius, or the rate of change of the optical power at any angle of the defocus area with the radius is continuous and first increases and then decreases, and finally tends to be uniform, and the rate of change is not 0.

[0010] According to the present invention, an external contact lens is provided, wherein the defocus area has at least one angle where the rate of change of optical power with radius is discontinuous.

[0011] According to the present invention, an external contact lens is provided in which at least two angles θ1 and θ2 exist within the annular width of the defocus zone, and the radial optical power curve corresponding to angle θ1 varies with the radius. Curve of radial optical power as a function of radius corresponding to angle θ2 They are not the same, where θ1∈[0°, 360°), θ2∈[0°, 360°), and r∈(D1 / 2, D2 / 2).

[0012] According to the present invention, an external contact lens has at least one optical power variation curve with angle on the circumference corresponding to a radius r1 within the annular width of the defocus area. It is not a constant value, where θ∈[0°, 360°) and r1∈(D1 / 2, D2 / 2).

[0013] According to the present invention, an external contact lens has a sector whose vertex coincides with the geometric center. Within any r within the sector, the optical power changes with the angle in accordance with the trend of a sine function.

[0014] According to the present invention, within the annular width of the defocus zone, on at least one diameter passing through the geometric center, the optical power distribution trends of the two radii are not the same; on the remaining diameters passing through the geometric center, the optical power distribution trends of the two radii are symmetrical about the geometric center. , θ∈[0°, 360°), r1∈(D1 / 2, D2 / 2], and θ is not equal to the direction of the diameter where the optical power distribution trend is different.

[0015] According to the contact lens provided by this utility model, within the annular width of the defocus zone, the optical power variation curves with radius for any angles θ1 and θ2 are not the same, i.e. Where θ1∈[0°, 360°), θ2∈[0°, 360°), r∈(D1 / 2, D2 / 2).

[0016] According to the extraocular contact lens provided by this utility model, the trend of optical power variation with angle on a semicircle corresponding to any radius r conforms to... , where θ∈(0°, 180°), r∈(D1 / 2, D2 / 2], and a and b are constants.

[0017] According to the present invention, the optical power variation curve of the semicircle corresponding to any radius r on the external contact lens conforms to the following formula (1).

[0018] (1)

[0019] Where r∈(D1 / 2, D2 / 2], , It is a constant. .

[0020] According to the present invention, the optical power of an external contact lens on a semicircle corresponding to any radius r changes with the angle in accordance with the following formula (2).

[0021] (2)

[0022] Where r∈(D1 / 2, D2 / 2], , It is a constant. .

[0023] According to the present invention, an extraocular contact lens provides a radial optical power variation curve corresponding to any angle θ within the annular width of the defocused zone. It is continuously differentiable, where θ∈(0°, 180°) and r∈(D1 / 2, D2 / 2).

[0024] According to the present invention, an external contact lens is provided, wherein the contact lens has a positioning structure that positions it relative to the eyeball in the circumferential direction when worn.

[0025] According to the present invention, an external contact lens is provided, wherein the positioning structure includes a weight-bearing portion, the outer periphery of the optical portion has a peripheral region, the weight-bearing portion is disposed in the peripheral region, and the weight-bearing portion is formed by providing a thickened region in the peripheral region.

[0026] According to the present invention, an external contact lens is provided, wherein the weight-bearing portion includes a thickened area and a thinned area, the thickened area and the thinned area are arranged at intervals along one diameter of the contact lens, and the thickened area and the thinned area are arranged opposite to each other on both sides of the center of the contact lens.

[0027] According to the present invention, an external contact lens is provided, wherein the weight-bearing portion includes at least two thinning regions, which are arranged opposite to each other on both sides of the center of the contact lens and are located on the same diameter of the contact lens.

[0028] According to the present invention, an external contact lens is provided, wherein the distance between two thinning zones on the same diameter of the contact lens is 7.5-14 mm.

[0029] This utility model also provides an external contact lens assembly, including multiple contact lenses as described above. The multiple contact lenses of the same contact lens assembly are used for the same affected eye of the wearer. The optical power of the central correction zone of each contact lens is the same, and the optical power distribution trend of the defocus zone of each contact lens is different.

[0030] This utility model also provides an external contact lens assembly, including multiple external contact lenses as described above. The multiple contact lenses of the same contact lens assembly are used for the same affected eye of the wearer. The optical power of the central correction zone of each contact lens is the same, and the optical power distribution trend of the defocus zone of each contact lens is the same or different. The peripheral areas of the multiple contact lenses are provided with the weight-bearing portion, and the projection of the weight-bearing portion of the multiple contact lenses in a plane perpendicular to the optical axis of the contact lens is spaced apart along the circumferential direction of the defocus zone.

[0031] According to the present invention, an external contact lens assembly is provided in which the distance between two adjacent projections is equal.

[0032] According to the present invention, in an external contact lens assembly, the distance between two adjacent projections gradually increases along the circumferential direction of the defocused area.

[0033] According to the present invention, in an external contact lens assembly, the distance between two adjacent projections first increases and then decreases along the circumferential direction of the defocused area.

[0034] According to the present invention, an external contact lens assembly is provided, wherein a plurality of the projections are symmetrically arranged in pairs about the optical axis of the contact lens along the circumferential direction of the defocus area.

[0035] According to the present invention, an external contact lens assembly is provided, wherein the contact lens is provided with marking symbols that correspond one-to-one with the weight-bearing part.

[0036] According to the present invention, an external 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.

[0037] The contact lens provided by this invention can not only change the optical power distribution along different angles through a single contact lens, but also form dynamic defocus by setting a group of contact lens components with different relative positions of the defocus area and the weight-bearing part, thereby improving the effective stimulation obtained by various positions on the retina and enhancing the myopia control effect. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in this invention 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 invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is one of the schematic diagrams of the optical power of a contact lens as a function of radius in the prior art.

[0040] Figure 2 This is one of the schematic diagrams of the optical power variation curve with radius provided by this utility model.

[0041] Figure 3 This is one of the three-dimensional schematic diagrams showing the trend of optical power variation of the contact lens provided by this utility model.

[0042] Figure 4 This is one of the top-view schematic diagrams showing the trend of optical power variation of the contact lens provided by this utility model.

[0043] Figure 5 This is one of the schematic diagrams of the optical power variation curve with angle provided by this utility model.

[0044] Figure 6 This is one of the schematic diagrams of the optical power variation curves with radius at several specific angles provided by this utility model.

[0045] Figure 7 This is one of the schematic diagrams showing the positional relationship of radii corresponding to several specific angles provided by this utility model.

[0046] Figure 8 This is one of the schematic diagrams showing the rate of change of optical power with radius at several specific angles provided by this utility model.

[0047] Figure 9 This is a schematic diagram of the structure of the contact mirror provided by this utility model.

[0048] Figure 10 This is the second schematic diagram of the optical power of a contact lens as a function of radius in the prior art.

[0049] Figure 11This is the second schematic diagram of the optical power variation curve with radius provided by this utility model.

[0050] Figure 12 This is the second three-dimensional schematic diagram of the optical power variation trend of the contact lens provided by this utility model.

[0051] Figure 13 This is the second top view schematic diagram of the optical power variation trend of the contact lens provided by this utility model.

[0052] Figure 14 This is the second schematic diagram of the optical power variation curve provided by this utility model.

[0053] Figure 15 This is the second schematic diagram of the curves showing the change of optical power with radius at several specific angles provided by this utility model.

[0054] Figure 16 This is the second schematic diagram showing the positional relationship of radii corresponding to several specific angles provided by this utility model.

[0055] Figure 17 This is the second of several schematic diagrams showing the rate of change of optical power with radius at specific angles provided by this utility model.

[0056] Figure 18 This is the third schematic diagram of the optical power of a contact lens as a function of radius in the prior art.

[0057] Figure 19 This is the third schematic diagram of the optical power variation curve with radius provided by this utility model.

[0058] Figure 20 This is the third three-dimensional schematic diagram of the optical power variation trend of the contact lens provided by this utility model.

[0059] Figure 21 This is the third top-view schematic diagram of the optical power variation trend of the contact lens provided by this utility model.

[0060] Figure 22 This is the third schematic diagram of the optical power variation curve provided by this utility model.

[0061] Figure 23 This is the third of several schematic diagrams showing the variation curves of optical power with radius at specific angles provided by this utility model.

[0062] Figure 24 This is the third schematic diagram showing the positional relationship of radii corresponding to several specific angles provided by this utility model.

[0063] Figure 25 This is one of the structural schematic diagrams of the contact lens provided by this utility model.

[0064] Figure 26 This is the second schematic diagram of the contact mirror provided by this utility model.

[0065] Figure 27 This is the third schematic diagram of the contact lens provided by this utility model.

[0066] Figure 28 This is the fourth schematic diagram of the contact lens provided by this utility model.

[0067] Figure 29 This is the fifth schematic diagram of the contact lens provided by this utility model.

[0068] Figure 30 This is the sixth schematic diagram of the contact mirror provided by this utility model.

[0069] Figure 31 This is the seventh schematic diagram of the contact mirror provided by this utility model.

[0070] Figure 32 This is the eighth schematic diagram of the contact mirror provided by this utility model.

[0071] Figure 33 yes Figure 32 A schematic diagram of the cross-section along section line AA.

[0072] Figure 34 yes Figure 32 A schematic diagram of the cross-section along section line BB.

[0073] Figure 35 This is the ninth schematic diagram of the contact mirror provided by this utility model.

[0074] Figure 36 This is one of the structural schematic diagrams of multiple contact lenses in the contact lens assembly provided by this utility model.

[0075] Figure 37 This is the second schematic diagram of the structure of multiple contact lenses in the contact lens assembly provided by this utility model.

[0076] Figure 38 This is one of the schematic diagrams showing the projection relationship of the vertical weight portion of multiple contact mirrors provided by this utility model.

[0077] Figure 39 This is the second schematic diagram showing the projection relationship of the vertical weights of multiple contact mirrors provided by this utility model.

[0078] Figure 40 This is the third schematic diagram showing the projection relationship of the vertical weights of multiple contact mirrors provided by this utility model.

[0079] Figure 41 This is the fourth schematic diagram showing the projection relationship of the vertical weights of multiple contact mirrors provided by this utility model.

[0080] Figure label:

[0081] 1. Optical section; 2. Peripheral area; 3. Weighting section; 4. Central correction area; 5. Defocus area; 6. Thickening area; 7. Thinning area; 8. Contact lens; 9. Marking. Detailed Implementation

[0082] like Figure 35 and Figure 36 As shown, the optical part 1 of the external contact lens has a geometric center that coincides with the center of the contact lens 8, meaning that the geometric center and the center of the contact lens 8 are the same point. The optical part 1 includes a central correction zone 4 centered on the geometric center and a defocus zone 5 surrounding the central correction zone 4. The central correction zone 4 is a circular area, and the defocus zone 5 is an annular area. The central correction zone 4 has a prescription optical power for correcting visual acuity, which is adapted to the degree of correction required by the wearer. The optical power of the defocus zone 5 is greater than or equal to the optical power of the central correction zone 4, and the optical power of the defocus zone 5 has different radial distribution trends at at least two angles.

[0083] It's important to note that prescription power is a parameter used to describe the ability of eyeglasses or contact lenses to focus light. Similar to the concept of optical power in optical systems, both measures the ability of an optical system to converge or diverge light. Prescription power varies depending on the degree of correction the wearer needs.

[0084] The contact lens provided by this utility model can not only change the optical power distribution along different angles through a single contact lens 8, but also form dynamic defocus by setting a group of contact lens components with different relative positions of the defocus area 5 and the weight part 3, thereby improving the effective stimulation obtained by various positions on the retina and enhancing the myopia control effect.

[0085] In one embodiment of this utility model, the diameter of the optical part 1 is 7-12mm, and the diameter of the central correction area 4 is 1.5-3.5mm.

[0086] In one embodiment of this utility model, within the annular width of the defocus zone 5, the optical power variation curve of the circumference corresponding to any radius r as a function of angle is shown. Continuously differentiable, where θ∈[0°, 360°), r∈(D1 / 2, D2 / 2], D1 is the inner diameter of the defocused region, and D2 is the outer diameter of the defocused region.

[0087] It should be noted that the radius of the defocus zone 5 in this application can be either the outer circle radius or the inner circle radius.

[0088] In one embodiment of this utility model, the defocusing region 5 has a non-continuous curve of optical power versus radius at at least one angle.

[0089] In one embodiment of this utility model, the optical power at any angle of the defocus area 5 gradually increases with the radius, or the rate of change of the optical power at any angle of the defocus area 5 with the radius is continuous and first increases and then decreases, and the rate of change is not 0.

[0090] In one embodiment of this utility model, the optical power at any angle of the defocus zone 5 gradually increases with the radius, or the rate of change of the optical power at any angle of the defocus zone 5 with the radius is continuous and first increases and then decreases, and finally tends to be uniform, and the rate of change is not 0.

[0091] In one embodiment of this invention, the defocus region 5 has at least one angle where the rate of change of optical power with radius is discontinuous.

[0092] In one embodiment of this invention, within the annular width of the defocus region 5, there are at least two angles θ1 and θ2, and the radial optical power curve corresponding to angle θ1 varies with the radius. Curve of radial optical power as a function of radius corresponding to angle θ2 They are not the same, where θ1∈[0°, 360°), θ2∈[0°, 360°), and r∈(D1 / 2, D2 / 2).

[0093] In one embodiment of this invention, within the annular width of the defocused region, there is at least one curve showing the change in optical power as a function of angle on the circumference corresponding to a radius r1. It is not a constant value, where θ∈[0°, 360°) and r1∈(D1 / 2, D2 / 2).

[0094] In one embodiment of this utility model, there is a sector with a vertex coinciding with the geometric center. Within the sector, on any circle corresponding to r, the optical power changes with the angle in accordance with the trend of a sine function.

[0095] In one embodiment of this invention, within the annular width of the defocus zone 5, the optical power distribution trends of the two radii are different along at least one diameter passing through the geometric center; along the remaining diameters passing through the geometric center, the optical power distribution trends of the two radii are symmetrical about the geometric center. , θ∈[0°, 360°), r1∈(D1 / 2, D2 / 2], and θ is not equal to the direction of the diameter with different optical power distribution trends.

[0096] It should be noted that the two radii here are the two radii that form the same diameter.

[0097] In one embodiment of this utility model, within the annular width of the defocus zone, the optical power variation curves with radius for any angles θ1 and θ2 are not the same, that is... Where θ1∈[0°, 360°), θ2∈[0°, 360°), r∈(D1 / 2, D2 / 2).

[0098] In one embodiment of this utility model, the trend of optical power variation with angle on the semicircle corresponding to any radius r conforms to... , where θ∈(0°, 180°), r∈(D1 / 2, D2 / 2], and a and b are constants.

[0099] In one embodiment of this utility model, the optical power variation curve of the semicircle corresponding to any radius r with respect to the angle conforms to the following formula (1).

[0100] (1)

[0101] Where r∈(D1 / 2, D2 / 2], , It is a constant. .

[0102] In one embodiment of this utility model, the optical power on the semicircle corresponding to any radius r changes with the angle according to the following formula (2).

[0103] (2)

[0104] Where r∈(D1 / 2, D2 / 2], , It is a constant. .

[0105] In one embodiment of this invention, within the annular width of the defocus zone, the radial optical power variation curve corresponding to any angle θ is shown. It is continuously differentiable, where θ∈(0°, 180°) and r∈(D1 / 2, D2 / 2).

[0106] In one embodiment of this utility model, the contact lens 8 is a corneal contact lens or a scleral contact lens 8, and the diameter of the optical part 1 of both the corneal contact lens and the scleral contact lens 8 is 6-12 mm. Preferably, the contact lens 8 is a corneal contact lens, which can be a soft corneal contact lens, a rigid corneal contact lens, or a hybrid corneal contact lens, wherein the rigid corneal contact lens includes a rigid non-permeable corneal contact lens, a rigid permeable corneal contact lens, or an orthokeratology lens.

[0107] In one embodiment of the present invention, the contact lens 8 has a positioning structure that positions it circumferentially relative to the eyeball when worn.

[0108] In one embodiment of this utility model, the positioning structure includes a weight-bearing portion 3, which can be one, two, or more. The outer periphery of the optical part 1 has a peripheral region 2, and the weight-bearing portion 3 is disposed in the peripheral region 2. The weight-bearing portion 3 is formed by providing a thickened area in the peripheral region 2. The shape of the weight-bearing portion 3 is fan-shaped, crescent-shaped, circular, or elliptical.

[0109] In one embodiment of the present invention, the weight-bearing portion 3 is elliptical in shape, and the elliptical weight-bearing portion 3 has a long groove and a short axis. The long axis of the plurality of weight-bearing portions 3 extends circumferentially along the contact mirror 8, and the short axis of the plurality of weight-bearing portions 3 extends radially along the contact mirror 8.

[0110] In one embodiment of this utility model, the weight-bearing portion 3 includes a thickened region 6 and a thinned region 7, which are arranged at a diametrical interval along the contact lens 8. The thickened region 6 and the thinned region 7 are positioned opposite each other on both sides of the center of the contact lens 8, that is, the thickened region 6 and the thinned region 7 are symmetrically arranged about the center of the contact lens 8. Of course, the thickened region 6 and the thinned region 7 can also be arranged asymmetrically.

[0111] In one embodiment of the present invention, the weight-bearing portion 3 is formed by the thickness of the contact mirror 8 gradually decreasing along the length of one diameter of the contact mirror 8.

[0112] In one embodiment of the present invention, the weight-bearing portion 3 includes at least two thinning regions 7, which are arranged opposite each other on both sides of the center of the contact lens 8 and are located on the same diameter of the contact lens 8.

[0113] In one embodiment of this invention, the distance between two thinning regions 7 on the same diameter of the contact mirror 8 is 7.5-14 mm.

[0114] This utility model also provides an external contact lens assembly, which includes multiple contact lenses 8 as described in the above embodiments. Multiple contact lenses 8 of the same contact lens assembly are used for the same affected eye of the wearer. The optical power of the central correction zone 4 of each contact lens 8 is the same, and the optical power distribution trend of the defocus zone 5 of each contact lens 8 is different.

[0115] It should be noted that in this embodiment, the contact lens 8 does not have a weighted part 3, because the optical power distribution trend of the defocus area 5 of each contact lens 8 is different, and the wearer can achieve dynamic defocus by wearing different lenses every day.

[0116] The contact lens assembly includes at least two contact lenses 8 for the same affected eye of the wearer. Each contact lens 8 has the same optical power in its central correction zone 4, but a different optical power distribution trend in its defocus zone 5. Because the optical power distribution trend of the defocus zone 5 of each contact lens 8 is different, the wearer can achieve dynamic defocus by wearing different lenses each day, thereby increasing the effective stimulation received at various locations on the retina and improving myopia control. Furthermore, to improve the wearing stability of the asymmetric defocus lenses, the outer periphery of each contact lens 8 may also have a weighted portion 3 to maintain the lens's stable positioning during wear. The projection of the weighted portion 3 of each contact lens 8 onto a plane perpendicular to the lens's optical axis is spaced along the circumference of the defocus zone 5. The wearer wears different contact lenses 8 at predetermined times according to the markings corresponding to the weighted portions 3, achieving dynamic defocus and thus increasing the effective stimulation received at various locations on the retina, which is beneficial for improving myopia control.

[0117] This utility model also provides an external contact lens assembly, which includes multiple external contact lenses as described in the above embodiments. Multiple contact lenses 8 of the same contact lens assembly are used for the same affected eye of the wearer. The optical power of the central correction zone 4 of each contact lens 8 is the same, and the optical power distribution trend of the defocus zone 5 of each contact lens 8 is the same. The peripheral areas 2 of the multiple contact lenses 8 are all provided with a weight 3. The projection of the weight 3 of the multiple contact lenses 8 in the plane perpendicular to the optical axis of the contact lens 8 is arranged at intervals along the circumferential direction of the defocus zone 5.

[0118] In one embodiment of this invention, the distance between two adjacent projections is equal, that is, multiple projections are arranged at equal intervals along the circumferential direction of the defocus area 5. Of course, the distance between two adjacent projections may not be equal.

[0119] In one embodiment of this invention, the distance between two adjacent projections gradually increases along the circumferential direction of the defocus zone 5. This arrangement results in a gradually increasing peripheral defocus as the wearer wears the garment, thus increasing the dynamic defocus. This approach considers the wearer's adaptation to the gradually increasing defocus while ensuring a larger dynamic defocus, thereby enhancing the myopia control effect.

[0120] It should be noted that the circumferential direction of the defocusing area 5 in this invention can be either clockwise or counterclockwise.

[0121] In an embodiment of the present utility model, the distance between two adjacent projections gradually decreases along the circumferential direction of the defocus area 5. With such a setting method, the peripheral defocus formed gradually increases with the wearing days, and the dynamic defocus formed gradually increases. This not only takes into account the wearer's adaptability to the gradually increasing defocus but also ensures the formation of a relatively large dynamic defocus, thereby enhancing the myopia prevention and control effect.

[0122] In an embodiment of the present utility model, the distance between two adjacent projections first increases and then decreases along the circumferential direction of the defocus area 5. With such a setting method, the peripheral defocus formed gradually increases with the wearing days, and the dynamic defocus formed gradually increases. This not only takes into account the wearer's adaptability to the gradually increasing defocus but also ensures the formation of a relatively large dynamic defocus, thereby enhancing the myopia prevention and control effect. Of course, the setting method of the hanging weight portion 3 is not limited to this, and the distance between two adjacent projections can also first decrease and then increase along the circumferential direction of the defocus area 5.

[0123] In an embodiment of the present utility model, multiple projections are symmetrically arranged in pairs about the optical axis of the contact lens 8 along the circumferential direction of the defocus area 5, and the projections symmetrically arranged in pairs are on the diameter of the same contact lens 8.

[0124] In an embodiment of the present utility model, the contact lens 8 is provided with marking symbols corresponding one by one to the hanging weight portion 3. The marking symbols can be numbers, such as: 1, 2, 3..., or Chinese characters, such as: one, two, three..., or English letters, etc.

[0125] In a specific embodiment of the present utility model, the contact lens 8 is a progressive power corneal contact lens, and the diameter of the contact lens 8 is 10.6 mm. The contact lens 8 is used for myopic patients and simultaneously delays the progression of myopia. The diameter of the optical portion 1 of the contact lens 8 is 6.0 mm, and the vertex spherical power of the contact lens 8 is -6.0 D. The back surface of the contact lens 8 is spherical, and the front surface of the contact lens 8 is aspherical. As Figure 1 shown, the contact lens 8 of the prior art has a rotationally symmetric optical power distribution of 360°.

[0126] As Figure 2 shown, Figure 2 illustrates the relationship curve between the radius and the optical power of the contact lens 8. As Figures 3 to 5 shown, the change of the optical power in the circumferential direction enveloped by any radius of the contact lens 8 is continuous. In this embodiment, the optical power of any point on the optical portion 1 of the contact lens 8 is greater than the optical power of the geometric center, or the optical power of some points on the optical portion 1 is greater than the optical power of the geometric center, and the optical power of the remaining points is equal to the optical power of the geometric center. As Figure 6 shown, Figure 6The figure lists several radii (0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm) corresponding to the circumference of the circle on which the optical power changes with the angle is continuously differentiable and conforms to the trend of a sine function.

[0127] like Figure 7 and Figure 8 As shown, Figure 7 and Figure 8 The text lists several different angles (0°, 45°, 90°, 126°, 198°, 270°, 336°) and shows that the optical power variation curves with radius are not entirely the same. Furthermore, the optical power distribution trends with radius at the 90° and 270° radii are symmetrical about the geometric center. , where θ∈[0°, 180°), θ≠90, r∈(0, 3).

[0128] In this embodiment, the circular central region with a diameter of 2.0 mm is the central correction zone 4, and the annular region with a diameter of 2-6 mm is the defocus zone 5. The optical power of the defocus zone 5 at any angle gradually increases with the radius, or the rate of change curve of optical power with the radius first increases and then decreases, and the rate of change is not zero. For example... Figure 8 As shown, the rate of change of optical power with radius is the same at different angles.

[0129] Furthermore, to facilitate positioning of the contact lens for external use, this embodiment also includes a peripheral region 2 surrounding the outer periphery of the optical part 1, and a positioning structure and / or marking 9 are provided in the peripheral region 2 at a 270° angle. For example... Figure 9 As shown, the position of the positioning structure is basically the same as the position of the mark 9. The positioning structure here usually refers to the thickness of the lower part of the lens (i.e., the direction of the lens towards the center of the earth after wearing) being increased to a certain extent, while the upper part of the lens is thinned. During the wearing process, the lens is subjected to gravity, and the thickest part is eventually kept at the bottom, forming a positioning effect. The thickened part is set outside the optical part 1 of the contact lens 8.

[0130] In another specific embodiment of this utility model, the contact lens 8 is a progressive focal length contact lens with a diameter of 14.0 mm. The contact lens 8 is used for myopic patients to simultaneously slow the progression of myopia. The diameter of the optical part 1 is 8.0 mm, and the vertex spherical power of the contact lens 8 is -6.0D. The rear surface of the contact lens 8 is spherical, and the front surface of the contact lens 8 is aspherical. Figure 10 As shown, in the prior art, the contact lens 8 has a 360° rotationally symmetrical power distribution. For example... Figure 11 As shown, the lens's , , , The curves showing the change in optical power as a function of radius at four angles are as follows: Figure 11 As shown. Figure 12 and Figure 13 As shown, the circumferential optical power variation of an arbitrary radius envelope is continuous.

[0131] In this embodiment, the optical power of any point on the contact lens optics is greater than the optical power of the geometric center, or the optical power of some points on the optics is greater than the optical power of the geometric center, and the optical power of the remaining points is equal to the optical power of the geometric center. For example... Figure 14 As shown, Figure 14 The text lists several radii (0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm) and shows that the circumferential optical power variation curves with angle are all continuously differentiable and conform to a sinusoidal function trend. For example... Figure 15 and Figure 16 As shown,

[0132] Figure 15 and Figure 16 The curves showing the change in optical power with radius at several different angles (6°, 30°, 135°, 252°, 336°) are not entirely the same.

[0133] In this embodiment, the circular central region with a diameter of 1.8 mm is the central correction zone 4, and the annular region with a diameter of 1.8-8 mm is the defocus zone 5. The optical power of the defocus zone 5 at any angle gradually increases with the radius, or the rate of change of optical power with the radius first increases and then decreases, and the rate of change is never zero. For example... Figure 17 As shown, the rate of change of optical power with radius at several different angles has the same trend.

[0134] In another specific embodiment of this utility model, the contact lens 8 is a progressive focal length contact lens with a diameter of 14 mm. The contact lens 8 is used for myopic patients to simultaneously slow the progression of myopia. The diameter of the optical part 1 of the contact lens 8 is 8.0 mm, and the vertex spherical power of the contact lens 8 is 0.0D. The rear surface of the contact lens 8 is spherical, and the front surface of the contact lens 8 is aspherical. Figure 18 As shown, the contact lens 8 in the prior art has a 360° rotationally symmetrical power distribution. For example... Figure 19 As shown, the optical part of the contact lens , Curves showing the change in optical power as a function of radius at several different angles. For example... Figure 20 and Figure 21 As shown, the circumferential optical power variation of an arbitrary radius envelope is continuous.

[0135] In this embodiment, the optical power of any point on the contact lens optics is greater than the optical power of the geometric center, or the optical power of some points on the optics is greater than the optical power of the geometric center, and the optical power of the remaining points is equal to the optical power of the geometric center. For example... Figure 22 As shown, Figure 22 The text lists several curves showing the variation of circumferential optical power with angle for radii (0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm), all of which are continuous, differentiable, and conform to a sinusoidal function trend. For example... Figure 23 and Figure 24 As shown, Figure 23 and Figure 24 The curves showing the change in optical power with radius at several different angles (6°, 30°, 135°, 252°, 336°) are not entirely the same.

[0136] In another specific embodiment of this utility model, such as Figure 9 As shown, to facilitate positioning of the contact lens 8, a mark 9 is provided on the outer periphery at a 270° angle. The location indicated by mark 9 is equipped with a positioning structure. This positioning structure is located below the contact lens 8 (i.e., towards the Earth's center after wearing). It is formed by thickening the contact lens 8 to a certain extent. During wear, due to gravity, the thickest part of the contact lens 8 remains at the bottom, thus achieving a positioning effect. The thickened area is located in the peripheral region 2, the edge area outside the optical zone of the contact lens 8. This peripheral region 2 has a positioning structure with varying thickness to ensure stable positioning of the contact lens 8.

[0137] This embodiment provides various specific configuration methods for the positioning structure. Other implementation methods of the positioning structure are described below.

[0138] like Figure 25 As shown, the contact lens 8 has a thickened region 6 and a thinned region 7, which are positioned opposite each other about the center of the contact lens 8 (180 degrees apart in the circumferential direction). Thus, the thickened region 6 and the thinned region 7 constitute a positioning structure that allows the contact lens 8 to be positioned circumferentially. Specifically, when the contact lens 8 is worn, because the thickened region 6 is relatively heavier and the thinned region 7 is relatively lighter, the contact lens will rotate or remain in a circumferential position where the thickened region 6 is on the lower side and the thinned region 7 is on the upper side.

[0139] like Figure 26 As shown, the contact lens 8 has a weight-bearing portion 3, which is fan-shaped and disposed in the peripheral region 2, located at the outer edge of the peripheral region 2. The weight-bearing portion 3 can be formed by locally thickening the contact lens. In this embodiment, the width of the weight-bearing portion 3 is the coverage area of ​​a 40° central angle.

[0140] In addition, the radial range of the fan-shaped weight portion 3 can be set to be within 7mm-15mm from the central correction zone, preferably 8mm-14mm or 9mm-13mm.

[0141] In addition, the area of ​​the weight-bearing part 3 can be set as follows: not limited to the above-mentioned 40°, the angle formed by the two sides of the weight-bearing part 3 in the circumferential direction is 10°-180°, preferably 20°-140° or 30°-110°.

[0142] In another specific embodiment of this utility model, such as Figure 27 As shown, in this embodiment, the width of the vertical weight 3 is the coverage area of ​​the 80° central angle.

[0143] In another specific embodiment of this utility model, such as Figure 28 As shown, in this embodiment, the width of the vertical weight 3 is the coverage area of ​​the central angle of 180°.

[0144] In another specific embodiment of this utility model, such as Figure 29 As shown, the contact lens of this embodiment has two weight-bearing parts 3, which are arranged symmetrically and spaced apart in the circumferential direction. Of course, the number of weight-bearing parts 3 is not limited to this, and more weight-bearing parts 3 can be provided. The structures of the multiple weight-bearing parts 3 can be the same or different. For example, three (odd number) weight-bearing parts 3 can be provided, with the two weight-bearing parts 3 on both sides arranged symmetrically, and the middle weight-bearing part 3 having a different structure (e.g., shape) from the weight-bearing parts 3 on both sides.

[0145] In another specific embodiment of this utility model, such as Figure 30 As shown, in this embodiment, the weight-bearing part 3 is elliptical in shape. The long side of the ellipse of the weight-bearing part 3 extends along the circumference of the contact mirror 8, and the short side extends approximately along the radial direction of the contact mirror 8.

[0146] The range of the weight 3 in the radial direction of the contact mirror is set as follows: with several centers as the center, within the range of diameter 7mm-15mm, 8mm-14mm or 9mm-13mm.

[0147] The length (major axis) of the ellipse is 3-8 mm, preferably 3.5-7 mm or 4-6 mm. The width (minor axis) of the ellipse is 1-5 mm, preferably 1.5-4.5 mm or 2-4 mm. The distance between the multiple elliptical weight portions 3 and the outer edge of the contact lens is 0.01-0.3 mm, 0.03-0.2 mm or 0.05-0.15 mm.

[0148] In another specific embodiment of this utility model, such as Figure 31As shown, both the thickening region 6 and the thinning region 7 are fan-shaped, and the width of both the thickening region 6 and the thinning region 7 (the range they occupy in the circumferential direction) is the range (area) covered by a central angle of 90°.

[0149] In this embodiment, the edge (peripheral area) of the contact lens is divided into four quadrants. The maximum thickness of the thickened area 6 is 0.2-0.7 mm, preferably 0.25-0.6 mm or 0.3-0.5 mm. The minimum thickness of the thinned area 7 is 0.05-0.4 mm, preferably 0.1-0.35 mm or 0.15-0.3 mm.

[0150] Of course, the division of the four quadrants is not limited to four equal parts (90 degrees). The setting range of the thickening zone 6 can also be 50°-130°, 65°-115°, or 80°-100°, and the setting range of the thinning zone 7 can also be 50°-130°, 65°-115°, or 80°-100°. The thickening zone 6 and the thinning zone 7 can be symmetrically distributed, or they can be asymmetrically distributed.

[0151] In another specific embodiment of this utility model, such as Figures 32 to 34 As shown, the thickness of the peripheral region 2 of the contact mirror 8 increases from one end of a certain diameter (e.g., Figure 32 The lower edge) crosses the center of the contact lens in the vertical direction towards the other end of the diameter (e.g. Figure 32 The upper edge gradually decreases in size.

[0152] like Figure 33 and Figure 34 As shown, the thickness T2 of the contact mirror 8 at the lower edge of the peripheral region 2 is greater than the thickness T1 at the upper edge. Furthermore, the thickness distribution of the peripheral region 2 is relative to the diameter (e.g., ...). Figure 32 The diameters extending vertically are symmetrically distributed so that the thickness T3 on the left side is equal to the thickness T4 on the right side.

[0153] By making the thickness of the upper and lower edges of the contact lens 8 gradually transition, the thickness of the upper and lower edges of the contact lens 8 is not uniformly distributed, but presents a gradual trend. The thickness is thickest at the lower part of the contact lens 8, and it begins to thin out at a fixed ratio as it extends upwards, reaching the thinnest position at the top of the contact lens 8. The thickness is evenly distributed in the horizontal direction. The purpose is to make the weight-bearing part 3 gradually transition. While achieving weight-bearing positioning, the thickness of the contact lens 8 does not have a significant thickening area, thus improving comfort.

[0154] This arrangement divides the peripheral region 2 of the contact lens 8 into two quadrants: the upper region is thinned, and the lower region is thickened. The maximum thickness of the thickened region 6 is 0.2-0.7 mm, 0.25-0.6 mm, or 0.3-0.5 mm. The minimum thickness of the thinned region 7 is 0.05-0.4 mm, 0.1-0.35 mm, or 0.15-0.3 mm.

[0155] In another specific embodiment of this utility model, such as Figure 31 As shown, the positioning structure includes two thinning zones 7, which are symmetrically arranged about the center of the contact lens 8. The contact lens 8 can be rotated to the correct position by the interaction between the eyelid and the eyeball. Specifically, because the eyelid exerts pressure on the eyeball, and the contact lens 8 has uneven thickness, the pressure from the eyelid automatically rotates the thicker edge to the area not covered by the eyelid, while the thinner edge rotates to the upper or lower positions covered by the eyelid, thus positioning the contact lens 8.

[0156] The width L1 of the thinning region 7 in the chord direction is 8-14 mm, preferably 8.5-13 mm or 9-12 mm. The distance between two thinning regions 7 is 7.5-14 mm, preferably 8-12.5 mm or 8.5-11 mm.

[0157] In one specific embodiment of this utility model, the external contact lens assembly includes multiple contact lenses 8. The projections of the weighted portions 3 of the multiple contact lenses 8 onto a plane perpendicular to the optical axis of the contact lens 8 are equidistantly spaced along the circumferential direction of the defocus area 5 (this can be understood as the central angles formed by adjacent projections being the same). Figure 36 As shown, the external contact lens assembly includes three contact lenses 8. The optical areas of these three contact lenses 8 are the same. The difference between them is that the positioning structures of the three contact lenses 8 in the peripheral area 2 are positioned differently relative to the optical areas. The projections of the positioning structures on these three contact lenses 8 in the plane perpendicular to the optical axis of the contact lens 8 are equidistantly spaced along the circumferential direction of the defocus area 5. The central angle formed by the projections of two adjacent positioning structures is 120 degrees.

[0158] Of course, the number of contact mirrors 8 is not limited to this. The number of contact mirrors 8 can also be 5, and the central angle formed by the projections of two adjacent positioning structures is 72°.

[0159] In one specific embodiment of this utility model, the distance between two adjacent projections is not equal, and the distance between two adjacent projections gradually increases along the circumferential direction of the defocus area 5. For example... Figure 37As shown, the external contact lens assembly includes five contact lenses 8. These five contact lenses 8 have the same optical zone. The difference between them is that the positioning structure set in the peripheral zone 2 is located in a different position relative to the optical zone. The distance between two adjacent projections in these five contact lenses 8 gradually increases along the circumferential direction of the defocus zone 5 (i.e., the interval from ① to ⑤ gradually increases), and the central angle formed by two adjacent projections gradually increases.

[0160] In one specific embodiment of this utility model, the distance between two adjacent projections gradually decreases along the circumferential direction of the defocus area 5, and the resulting peripheral defocus gradually increases with the number of days of wear, thereby gradually increasing and enhancing the dynamic defocus. This takes into account the patient's adaptation to the gradually increasing defocus while ensuring the formation of a large dynamic defocus, thus increasing the myopia control effect. Figure 38 As shown, the external contact lens assembly includes five contact lenses 8. These five contact lenses 8 have the same optical zone. The difference between them is that the positioning structure set in the peripheral zone 2 is located in a different position relative to the optical zone. The weight 3 of these five contact lenses 8 forms five projections in a plane perpendicular to the optical axis of the contact lens 8. The distance between two adjacent projections gradually decreases along the circumferential direction of the defocus zone 5 (i.e., the interval from ① to ⑤ gradually decreases), and the central angle formed by two adjacent projections gradually decreases.

[0161] In one specific embodiment of this utility model, the distance between two adjacent projections first increases and then decreases along the circumferential direction of the defocus area 5. For example... Figure 39 As shown, the external contact lens assembly includes five contact lenses 8. These five contact lenses 8 have the same optical zone. The difference between them is that the positioning structure set in the peripheral zone 2 is located in a different position relative to the optical zone. The weight 3 of these five contact lenses 8 forms five projections in a plane perpendicular to the optical axis of the contact lens 8. The distance between two adjacent projections first increases and then decreases along the circumferential direction of the defocus zone 5 (that is, the interval from ① to ⑤ first increases and then decreases), that is, the central angle formed by two adjacent projections first increases and then decreases.

[0162] In one specific embodiment of this utility model, the distance between two adjacent projections first decreases and then increases along the circumferential direction of the defocus area 5. For example... Figure 40 As shown, the external contact lens assembly includes five contact lenses 8. These five contact lenses 8 have the same optical zone. The difference between them is that the positioning structure set in the peripheral zone 2 is located in a different position relative to the optical zone. The weight 3 of these five contact lenses 8 forms five projections in a plane perpendicular to the optical axis of the contact lens 8. The distance between two adjacent projections first decreases and then increases along the circumferential direction of the defocus zone 5 (that is, the interval from ① to ⑤ first decreases and then increases), that is, the central angle formed by two adjacent projections first decreases and then increases.

[0163] In one specific embodiment of this utility model, at least two of the plurality of projections are symmetrically arranged about one diameter of the contact mirror 8. For example... Figure 41 As shown, the external contact lens assembly includes five contact lenses 8. These five contact lenses 8 have the same optical area. The difference between them is that the positioning structure set in the peripheral area 2 is set in a different position relative to the optical area. The weight 3 of these five contact lenses 8 forms five projections in a plane perpendicular to the optical axis of the contact lens 8. The diameter of the contact lens 8 is through projection ①, and the remaining four projections are symmetrically arranged in pairs about the diameter.

[0164] In one specific embodiment of this utility model, the contact lens assembly includes at least two contact lenses. Specifically, the number of contact lenses in the contact lens 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, semi-monthly disposable, monthly disposable, quarterly disposable, semi-annual disposable, or yearly disposable. Preferably, the contact lenses are daily disposable.

[0165] This utility model also provides a method of using a contact lens assembly. The method of use is based on the contact lens assembly described in any of the above embodiments, wherein the wearer wears the contact lens 8 in the order of the marked symbols.

[0166] This utility model also provides a method of using a contact lens assembly. The method of use is based on the contact lens assembly described in any of the above embodiments. The wearer wears the contact lens 8 within a predetermined time according to the marking symbols, so that the projection forms a dynamic arrangement along the circumferential direction of the defocus area 5.

[0167] In one specific embodiment of this utility model, the contact assembly includes multiple contact lenses 8. Each contact lens 8 is marked with a symbol corresponding to a weighted portion 3. The wearer wears the contact lenses 8 in the order of the marked symbols, thereby ensuring that the projection of the weighted portion 3 on each contact lens 8 onto the plane perpendicular to the optical axis of the contact lens 8, along the circumferential direction of the defocus area 5, satisfies the features described in the above embodiment. Figure 37 As shown, the contact assembly includes five contact lenses 8. These five contact lenses 8 have identical optical areas, but differ in the position of the weight-bearing portion 3 located in the peripheral area 2 relative to the optical area. Each contact lens 8 has a numerical label on its peripheral area 2 corresponding to the weight-bearing portion 3. The wearer wears the contact lenses 8 according to the order of the marked symbols. This is, of course, another specific embodiment and not a limitation. Figure 37 In the illustrated embodiment, the five contact lenses 8 have the same central correction zone, but their defocus zones 5 may also be different.

[0168] It is easy to understand that the wearer wears the contact lens 8 according to the marked symbols within a predetermined time so that the projection forms a dynamic arrangement along the circumference of the defocus zone 5, for example, as... Figure 37 As shown, each contact lens 8 has a numerical label on its peripheral area 2 that corresponds one-to-one with the weight portion 3. The wearer can wear one of the numerical labels each morning for five days, and the numerical labels of the contact lenses 8 worn on these five days will be different. Alternatively, in the next five-day cycle, the lenses can be worn in a completely different order than in the previous five-day cycle, so that the projections are dynamically arranged along the circumference of the defocus area 5.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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; and these 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 the present invention.

Claims

1. An eyewear contact lens, characterized by, The optical portion of the contact lens has a geometric center, and includes a central correction zone centered on the geometric center and a defocus zone surrounding the central correction zone. The central correction zone has a prescription optical power for correcting visual acuity, and the prescription optical power is adapted to the degree of correction required by the wearer. The optical power of the defocus zone is greater than or equal to the optical power of the central correction zone, and the optical power of the defocus zone has different radial distribution trends at at least two angles.

2. The eyewear according to claim 1, wherein, The diameter of the optical part is 7-12mm, and the diameter of the central correction area is 1.5-3.5mm.

3. The eyewear according to claim 1, wherein, In the annular width range of the defocus zone, the curve of the power on the circumference corresponding to any radius r varying with angle is continuously derivable, wherein θ ∈ [0°, 360°), r ∈ (D1 / 2, D2 / 2], D1 is the inner circle diameter of the defocus zone, and D2 is the outer circle diameter of the defocus zone.

4. The eyewear of claim 1, wherein, The defocused region has a non-continuous optical power variation curve with radius at at least one angle.

5. The eyewear according to claim 1, wherein, The optical power at any angle in the defocused area gradually increases with the radius, or the rate of change of the optical power at any angle in the defocused area with the radius is continuous and first increases and then decreases, and the rate of change is not 0.

6. The eyewear according to claim 1, wherein, The optical power at any angle in the defocused area gradually increases with the radius, or the rate of change of optical power at any angle in the defocused area with the radius is continuous and first increases and then decreases, eventually tending to be uniform, and the rate of change is not 0.

7. The eyewear according to claim 1, wherein, The defocused region has at least one angle where the rate of change of optical power with radius is discontinuous.

8. The eyewear according to claim 1, wherein, Within the annular width of the defocused region, there are at least two angles θ1 and θ2, and the radial optical power curve corresponding to angle θ1 varies with the radius. Curve of radial optical power as a function of radius corresponding to angle θ2 They are not the same, where θ1∈[0°, 360°), θ2∈[0°, 360°), and r∈(D1 / 2, D2 / 2).

9. The eyewear according to claim 1, wherein, Within the annular width of the defocused region, there is at least one curve showing the change in optical power as a function of angle on the circumference corresponding to a radius r1. It is not a constant value, where θ∈[0°, 360°) and r1∈(D1 / 2, D2 / 2).

10. The eyewear according to claim 1, wherein, A sector with one vertex coinciding with the geometric center, where the optical power varies with angle on any circle corresponding to r within the sector, follows the trend of a sine function.

11. The eyewear according to claim 1, wherein, Within the annular width of the defocused region, on at least one diameter passing through the geometric center, the optical power distribution trends of the two radii are not the same; on the remaining diameters passing through the geometric center, the optical power distribution trends of the two radii are symmetrical about the geometric center. , θ∈[0°, 360°), r1∈(D1 / 2, D2 / 2], and θ is not equal to the direction of the diameter where the optical power distribution trend is different.

12. The eyewear according to claim 1, wherein, Within the annular width of the defocused zone, the optical power variation curves with radius are different for any angles θ1 and θ2, i.e. Where θ1∈[0°, 360°), θ2∈[0°, 360°), r∈(D1 / 2, D2 / 2).

13. The eyewear according to claim 1, wherein, The trend of optical power variation with angle on a semicircle corresponding to any radius r conforms to... , where θ∈(0°, 180°), r∈(D1 / 2, D2 / 2], and a and b are constants.

14. The eyewear according to claim 1, wherein, The curve of optical power on a semicircle with arbitrary radius r as a function of angle conforms to the following formula (1); （1） where r e (D1 / 2, D2 / 2], , is a constant, .

15. The eyewear according to claim 1, wherein, The trend of optical power on a semicircle with any radius r as a function of angle conforms to the following formula (2); （2） where r e (D1 / 2, D2 / 2], , is a constant, .

16. The eyewear of claim 1, wherein, Within the annular width of the defocused region, the radial optical power variation curve corresponding to any angle θ is shown. It is continuously differentiable, where θ∈(0°, 180°) and r∈(D1 / 2, D2 / 2).

17. The ocular-wear contact lens of any one of claims 1 to 16, wherein, The contact lens has a positioning structure that positions it circumferentially relative to the eyeball when worn.

18. The eyewear according to claim 17, wherein, The positioning structure includes a weighted part, the outer periphery of the optical part has a peripheral region, the weighted part is disposed in the peripheral region, and the weighted part is formed by providing a thickened region in the peripheral region.

19. The eyewear according to claim 18, wherein, The weight-bearing portion includes a thickened area and a thinned area, which are arranged at intervals along one diameter of the contact lens and are positioned opposite each other on both sides of the center of the contact lens.

20. The eyewear according to claim 19, wherein, The weight-bearing portion includes at least two thinning regions, which are arranged opposite each other on both sides of the center of the contact lens and are located on the same diameter of the contact lens.

21. The eyewear contact lens of claim 19, wherein, The distance between the two thinning zones on the same diameter of the contact mirror is 7.5-14 mm.

22. An eyewear contact lens assembly, comprising: The device includes multiple contact lenses as described in any one of claims 1 to 16, wherein multiple contact lenses of the same contact lens assembly are used for the same affected eye of the wearer, wherein the optical power of the central correction zone of each contact lens is the same, and the optical power distribution trend of the defocus zone of each contact lens is different.

23. An eyewear contact lens assembly, comprising: The device includes multiple extraocular contact lenses as described in any one of claims 1 to 21, wherein multiple contact lenses of the same contact lens assembly are used for the same affected eye of the wearer, the optical power of the central correction zone of each contact lens is the same, and the optical power distribution trend of the defocus zone of each contact lens is the same or different; the peripheral areas of the multiple contact lenses are provided with the weight-bearing portion, and the projection of the weight-bearing portion of the multiple contact lenses in a plane perpendicular to the optical axis of the contact lens is spaced apart along the circumferential direction of the defocus zone.

24. The eyewear contact lens assembly of claim 23, wherein, The distance between any two adjacent projections is equal.

25. The eyewear contact lens assembly of claim 23, wherein, The distance between two adjacent projections gradually increases along the circumferential direction of the defocused area.

26. The eyewear contact lens assembly of claim 23, wherein, The distance between two adjacent projections first increases and then decreases along the circumferential direction of the defocused area.

27. The eyewear contact lens assembly of claim 23, wherein, The multiple projections are arranged symmetrically in pairs about the optical axis of the contact lens along the circumferential direction of the defocus area.

28. The eyewear contact lens assembly of any of claims 23 to 27, wherein, The contact lens is marked with a symbol that corresponds one-to-one with the weight-bearing part.

29. The eyewear contact lens assembly of any of claims 23 to 27, wherein, The contact lens assembly includes at least two contact lenses, which are daily disposable, weekly disposable, semi-monthly disposable, monthly disposable, quarterly disposable, semi-annual disposable, or yearly disposable.

Images