Contact lens assembly and manufacturing apparatus

Abstract

The utility model provides a contact lens and manufacturing equipment thereof, which can achieve a better prevention and control effect. The utility model provides a contact lens assembly with asymmetric patterns, which comprises a lens, preferably, a first pattern area with a first pattern and a second pattern area with a second pattern are at least arranged on an optical area of the lens, and the light transmittance provided by the first pattern is different from that provided by the second pattern. By the adoption of the structure, due to the fact that the light transmittance of the first pattern area and the light transmittance of the second pattern area are different, asymmetric patterns are formed, asymmetric contrast sensitivity distribution is formed on the retina, and then the prevention and control effects of inhibiting eye axis growth, improving myopia and the like are achieved.

Description

Technical Field

[0001] This utility model relates to a contact lens assembly and manufacturing equipment. Background Technology

[0002] Myopia has long been a problem that plagues people. Due to the widespread use of electronic products, the number of people suffering from myopia is increasing. Therefore, myopia prevention and control has become increasingly important in recent years. To prevent and control myopia, contact lenses such as orthokeratology lenses and defocusing lenses are often used. Utility Model Content

[0003] During the wearing of current contact lenses, the myopia defocus signal or sensitivity received by the human eye's retina is basically fixed in the 360-degree direction. As a result, the stimulation received by each position on the retina is fixed. 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 can easily lead to a decline in the prevention and control of myopia.

[0004] In view of this, the present invention provides a contact lens assembly and manufacturing equipment to improve the prevention and control of myopia and other diseases.

[0005] This invention provides a contact lens assembly with an asymmetrical pattern, including a lens, wherein at least on the optical area of ​​the lens, there is a first pattern area with a first pattern and a second pattern area with a second pattern, and the first pattern and the second pattern provide different light transmittance.

[0006] With the above structure, which has two pattern areas, namely the first pattern area and the second pattern area, the light transmittance provided by the two is different, thus forming an asymmetrical contrast sensitivity distribution on the wearer's retina, thereby inhibiting axial elongation and improving the prevention and control of myopia.

[0007] As one possible implementation, the first pattern provided by the first pattern area is a dot matrix pattern capable of generating light scattering, and the second pattern provided by the second pattern area is a dot matrix pattern capable of generating light scattering. The individual dot matrix patterns of the first pattern area and the second pattern area are the same but arranged differently, or the individual dot matrix patterns of the first pattern area and the second pattern area are different but arranged in the same or different ways.

[0008] As one possible implementation, the outer contour shape of the second pattern area is: bubble-shaped, teardrop-shaped, heart-shaped, circle-shaped, elliptical, symmetrical polygon, asymmetrical polygon, or any other shape other than these.

[0009] As one possible implementation, the second pattern area is gradually connected to the first pattern area, meaning that the boundary between the two is not obvious.

[0010] As one possible implementation, the second pattern area may be one or more.

[0011] As one possible implementation, there are multiple lenses, and the second pattern areas among the multiple lenses are distributed at equal intervals or symmetrically around the optical axis of the optical area in the circumferential direction.

[0012] As one possible implementation, the second patterned areas between multiple lenses are distributed at equal intervals along the circumferential direction around the optical axis of the optical area with a central angle of 360° / N, where N is a natural number and its value ranges from 2 to 36.

[0013] As one possible implementation, there are multiple lenses, and the second pattern areas among the multiple lenses are distributed at different intervals or asymmetrically along the optical axis of the optical region in the circumferential direction.

[0014] As one possible implementation, the second patterned areas between the plurality of lenses are distributed around the optical axis of the optical area in any of the following circumferential directions: the interval gradually increases, the interval gradually decreases, the interval first increases and then decreases, or the interval first decreases and then increases.

[0015] As one possible implementation, the transmittance of the second patterned area is greater than or less than the transmittance of the first patterned area.

[0016] One possible implementation includes 2-36 lenses, or 2-7 lenses.

[0017] As one possible implementation, the lens has a positioning structure that positions it circumferentially relative to the eyeball when worn.

[0018] As one possible implementation, the positioning structure includes a weighted portion disposed in the peripheral area surrounding the optical area, wherein the weighted portions between multiple lenses are positioned differently from the second pattern area in the circumferential direction.

[0019] As one possible implementation, the weight-bearing portion is formed by providing a thickened area in the peripheral region.

[0020] As one possible implementation, the weight-bearing portion is located at the edge of the lens.

[0021] The number of vertical weight-bearing parts is one or more, and the multiple vertical weight-bearing parts are symmetrically arranged.

[0022] The shape of the vertical weight-bearing part is fan-shaped, ring-shaped, crescent-shaped, circular, or flattened.

[0023] As one possible implementation, the vertical weight-bearing portion extends circumferentially, with a circumferential width ranging from 10° to 180°, 20° to 140°, or 30° to 110°.

[0024] As one possible implementation, the range in the radial direction of the lens is set as follows: with the center of the optical zone as the center, the diameter is within the range of 7mm to 15mm, 8mm to 14mm, or 9mm to 13mm.

[0025] As one possible implementation, two or more elliptical weight-bearing portions are provided, wherein the major axis of the plurality of elliptical weight-bearing portions extends circumferentially along the lens and the minor axis extends radially along the lens.

[0026] The radial range of the lens is set as follows: within a diameter of 7mm to 15mm, 8mm to 14mm, or 9mm to 13mm, centered on the center of the optical zone.

[0027] The distances between the multiple elliptical, vertically oriented portions and the outer edge of the lens are 0.01–0.3 mm, 0.03–0.2 mm, or 0.05–0.15 mm.

[0028] The major axis of the ellipse is 3–8 mm, 3.5–7 mm, or 4–6 mm, and the minor axis is 1–5 mm, 1.5–4.5 mm, or 2–4 mm.

[0029] As one possible implementation, the positioning structure includes a thickening region and a thinning region, which are arranged opposite each other across the center of the lens along a certain diameter direction of the lens.

[0030] As one possible implementation, the maximum size of the thickened area is 0.2–0.7 mm, 0.25–0.6 mm, or 0.3–0.5 mm.

[0031] As one possible implementation, the minimum size of the thinned region is 0.05–0.4 mm, 0.1–0.35 mm, or 0.15–0.3 mm.

[0032] As one possible implementation, the thickened region has an angular range of 50° to 130°, 65° to 115°, or 80° to 100° in the circumferential direction.

[0033] As one possible implementation, the thinning region has an angular range of 50° to 130°, 65° to 115°, or 80° to 100° in the circumferential direction.

[0034] As one possible implementation, the thickened region and the thinned region are symmetrically or asymmetrically distributed.

[0035] As one possible implementation, the thickness of the peripheral region of the lens gradually decreases continuously from one side of the radial direction across the center of the lens to the other side, thereby forming the positioning structure.

[0036] As one possible implementation, the positioning structure includes at least two thinning zones that are arranged opposite each other across the center of the lens in a certain radial direction.

[0037] The width of the thinning zone in the chordal direction of the lens can be 8-14 mm, 8.5-13 mm, or 9-12 mm.

[0038] The distance between the two thinning intervals can be set such that, in the direction of the aforementioned "certain diameter", the closest interval between the two is 7.5–14 mm, 8–12.5 mm, or 8.5–11 mm.

[0039] As one possible implementation, the lens is a scleral contact lens or a corneal contact lens.

[0040] 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-gas-permeable corneal contact lens, a rigid gas-permeable corneal contact lens, or an orthokeratology lens.

[0041] The diameter of the optical zone of the corneal contact lens is 6-12 mm, and the diameter of the optical zone of the scleral contact lens is 6-12 mm.

[0042] As one possible implementation, the first patterned area covers the entire optical area, and the second patterned area is located within the optical area and near its edge.

[0043] As one possible implementation, the optical zone has a central correction zone located at the center, and a first annular pattern zone arranged around the central correction zone, with a second pattern zone located within the first pattern zone. The central correction zone has a prescription optical power or 0 optical power for correcting visual acuity.

[0044] As one possible implementation, the optical area has a central correction zone located at the center and an annular defocus zone arranged around the central correction zone. The central correction zone 11 has a prescription optical power or 0 optical power for correcting visual acuity. The optical power of the defocus zone is greater than or equal to that of the central correction zone. The first pattern area is disposed within the defocus zone.

[0045] As one possible implementation, a first pattern area is provided in a ring around the optical area in a peripheral area surrounding the optical area, and a second pattern area is located within the first pattern area.

[0046] As one possible implementation, the contact mirror includes a first substrate and a second substrate, with the first patterned area and the second patterned area being sandwiched between the first substrate and the second substrate.

[0047] One possible implementation includes multiple lenses, which may have different colors, packaging, or markings.

[0048] As one possible implementation, the different colors, packaging, or markings among the multiple lenses are set at equal central angle intervals according to the second pattern area.

[0049] As one possible implementation, the different colors, packaging devices, or marking symbols among the multiple lenses are set according to different central angle intervals formed by the second pattern area.

[0050] As one possible implementation, the first pattern and / or the second pattern may be colored.

[0051] One possible implementation includes multiple lenses for use in the same eye or both eyes of the same patient. Here, a group may include 2-365 or 2-7 lenses.

[0052] Lenses can be daily disposable, weekly disposable, bi-monthly disposable, monthly disposable, quarterly disposable, semi-annual disposable, or annual disposable, with daily disposable being the preferred option.

[0053] This utility model also provides a manufacturing apparatus for manufacturing the contact lens, including a concave mold, a convex mold, a first molding liquid supply mechanism, a second molding liquid supply mechanism, a printing mechanism, a pressing mechanism, and a control unit. Under the control of the control unit, the first molding liquid supply mechanism applies a first molding liquid to the convex mold to form a first substrate. The printing mechanism forms a first pattern area and a second pattern area on the first substrate by ink printing. In addition, the second molding liquid supply mechanism provides a second molding liquid to the concave mold. The pressing mechanism presses the convex mold and the concave mold together to form the lens. The lens includes the first substrate and a second substrate formed by the second molding liquid, with the first pattern area and the second pattern area formed by the ink covering the space between the first substrate and the second substrate.

[0054] As one possible implementation, the manufacturing equipment further includes a camera, and a punch rotation mechanism and / or a die rotation mechanism. Indicator marks indicating circumferential positions are respectively provided on the die and the punch. The camera is used to capture images of the die and the punch, generating die image information and punch image information. The control unit receives the die image information and punch image information from the camera. Based on the die image information, the control unit generates a first control command, instructing the punch rotation mechanism to rotate the punch to a first predetermined angle. In this state, the printing mechanism forms a second pattern area on the punch, such that the second pattern area and the indicator marks on the punch are separated by a predetermined angle in the circumferential direction. Based on the punch image information and die image information, the control unit generates a second control command, instructing the punch rotation mechanism and / or the die rotation mechanism to position the punch and the die at a predetermined relative circumferential position. The control unit then causes the pressing mechanism to press the punch and die at the predetermined relative circumferential position.

[0055] As one possible implementation, the indicator mark is formed by a notch.

[0056] This utility model also provides a method for manufacturing the contact lens, comprising the following steps:

[0057] A first molding liquid is applied to a punch to form a first substrate.

[0058] The first pattern area and the second pattern area are formed on the first substrate by ink printing;

[0059] The second molding liquid is filled into the cavity mold;

[0060] A punch having a first substrate and a first pattern area and a second pattern area formed on the first substrate is pressed together with a die filled with a second molding liquid to form a lens, wherein the lens includes a second substrate formed by the first substrate and the second molding liquid, and the first pattern area and the second pattern area formed by the ink are covered between the first substrate and the second substrate.

[0061] As a possible implementation, the method also includes the following steps:

[0062] The concave mold and the convex mold are photographed to obtain concave mold photograph information and convex mold photograph information, wherein the concave mold and the convex mold are respectively provided with indicator marks indicating the circumferential position;

[0063] A first control command is generated based on the punch imaging information. The first control command is used to rotate the punch to a first predetermined angle.

[0064] A third control command is generated, which is used to form a second pattern area on the punch when the punch is in a first predetermined angle, such that the second pattern area and the indicator mark on the punch are separated by a predetermined angle in the circumferential direction;

[0065] A second control command is generated based on the die-shot information and the die-shot information. The second control command is used to position the punch and the die at a predetermined relative circumferential position.

[0066] A fourth control command is generated, which is used to cause the pressing mechanism to press the punch and die, which are in a predetermined relative circumferential position.

[0067] This utility model also provides a computer program product, which, when executed by a computer, implements the above-described manufacturing method. Attached Figure Description

[0068] The various technical features of this application and their relationships will be further explained below with reference to the accompanying drawings. The drawings are exemplary; some technical features are not shown to scale, and some drawings may omit technical features commonly used in the art to which this application pertains that are not essential for understanding and implementing this application, or additionally show technical features that are not essential for understanding and implementing this application. In other words, the combination of various technical features shown in the drawings is not intended to limit this application. Furthermore, throughout this application, the same reference numerals refer to the same things. Specific descriptions of the drawings are as follows:

[0069] Figures 1a-1d This is a schematic diagram of the structure of multiple lenses in a contact lens assembly according to one embodiment of the present invention;

[0070] Figures 2a-2d This is a schematic diagram of the structure of multiple lenses in a contact lens assembly according to one embodiment of the present invention;

[0071] Figures 3a-3f This is a schematic diagram of the structure of multiple lenses in a contact lens assembly according to one embodiment of the present invention;

[0072] Figures 4a-4c This is a schematic diagram of the structure of multiple lenses in a contact lens assembly according to one embodiment of the present invention;

[0073] Figures 5a-5c This is a schematic diagram of the structure of multiple lenses in a contact lens assembly according to one embodiment of the present invention;

[0074] Figure 6 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention;

[0075] Figure 7 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention;

[0076] Figure 8 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention;

[0077] Figures 9a-9d This is a schematic diagram of the structure of multiple lenses in a contact lens assembly according to one embodiment of the present invention;

[0078] Figure 10 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention;

[0079] Figure 11 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention;

[0080] Figure 12 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention;

[0081] Figure 13 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention;

[0082] Figure 14 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention;

[0083] Figure 15 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention;

[0084] Figure 16 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention;

[0085] Figure 17 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention;

[0086] Figure 18 yes Figure 17 Schematic diagram of the cross section at line AA;

[0087] Figure 19 yes Figure 17 Schematic diagram of the cross section at the middle BB line;

[0088] Figure 20 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention;

[0089] Figure 21 This is a schematic block diagram of the structure of a contact lens manufacturing equipment according to one embodiment of the present invention;

[0090] Figure 22b This is a schematic diagram of the structure of the punch in the manufacturing equipment, in which... Figure 22a This is a side view diagram. Figure 22b This is a top-down view;

[0091] Figure 23a , Figure 23b This is a schematic diagram of the die cavity in the manufacturing equipment, in which... Figure 23a This is a side view diagram. Figure 23b This is a top-down view;

[0092] Figure 24 This is a flowchart illustrating a method for manufacturing a contact lens according to one embodiment of the present invention. Detailed Implementation

[0093] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0094] Figures 1a-1d This is a schematic diagram of the structure of multiple lenses of a contact lens assembly according to one embodiment of the present invention.

[0095] like Figures 1a-1d As shown, the contact lens assembly of this embodiment includes a plurality of (4) lenses 10, each lens 10 having a central optical region 1 and a peripheral region 2 located on the outer periphery of the optical region 1. The lens 10 also includes asymmetrical patterns, specifically a first pattern region 4 and second pattern regions 51a, 51b, 51c, or 51d. The first pattern region 4 and the second pattern region provide different light transmittances.

[0096] Because it has two pattern areas, namely the first pattern area 4 and the second pattern area, the two provide different light transmittance, forming an asymmetrical pattern and different sensitivity stimulation. Therefore, it can create asymmetrical changes in stimulation to the eyeball, thereby achieving better prevention and control effects for myopia and other conditions.

[0097] The “pattern area” refers to the area with a pattern, which can be various graphics, patterns, or patterns composed of dot matrix (DOT), and the pattern can be black and white or colored.

[0098] To achieve different levels of sensitivity, in this embodiment, the first pattern area 4 and the second pattern area are dot matrix patterns capable of generating light scattering, and their overall shapes are different. Furthermore, in this embodiment, the first pattern area 4 is circular and overlaps with the area of ​​the optical area 1, that is, it covers the entire optical area 1. In this case, since there are transparent areas between the dot matrix patterns constituting the first pattern area 4, the wearer's normal visual needs can be guaranteed to a certain extent. As another embodiment, the first pattern area 4 may cover only an area smaller than the diameter of the optical area 1, or it may extend beyond the diameter of the optical area 1.

[0099] The pattern area is not limited to a dot matrix method; other methods can also be used, such as any semi-transparent or opaque continuous pattern, or different colored patterns or patterns with different grayscale values.

[0100] In addition, different light transmittances can be achieved by different proportions of occluded areas (e.g., the proportion of the total area of ​​the "dots" in the pattern area), different transparency, different colors, and / or different grayscale values.

[0101] In addition, the relationship between the light transmittance of the first pattern area and the second pattern area can be freely set. The light transmittance provided by the first pattern area can be greater than that of the second pattern area or less than that of the second pattern area.

[0102] The second pattern area is roughly teardrop-shaped and located within the first pattern area 4 (it can be understood that, within the range of the second pattern area, the pattern of the first pattern area does not exist; that is, a portion of the first pattern area is transformed into the second pattern area). In other embodiments, the second pattern area can be located in other positions; it may not be located within the first pattern area 4, but may be located in the peripheral area 2, or it may span both the optical area 1 and the peripheral area 2. In this embodiment, the second pattern area is a teardrop shape with its tip pointing towards the inner periphery (center side). However, in other embodiments, it can be other shapes, such as bubble-shaped, circular, elliptical, star-shaped, symmetrical polygons (triangles, squares, rhombuses, etc.), asymmetrical polygons, or other shapes besides these, or randomly generated arbitrary shapes with arbitrary contours, etc.

[0103] The individual dot matrix patterns (the shapes of the dots, such as round dots, square dots, rhomboid dots, etc.) in the first pattern area 4 and the second pattern area can be the same or different, the arrangement can be the same or different, and the density can be the same or different.

[0104] In addition, the "dots" in the dot matrix can be black or gray, transparent, or other colors.

[0105] In addition, the first pattern area 4 and / or the second pattern area may be colored, and the colored parts may be opaque, semi-transparent, or have their light transmittance controlled within a specific range. This not only increases the stimulating effect and improves the control effect, but also enhances the aesthetics.

[0106] Additionally, refer to Figures 1a-1d The second pattern areas between the multiple lenses 10 are located at different positions in the circumferential direction, and they are arranged at equal intervals of 90 degrees along the circumferential direction (in other embodiments, they can also be arranged at unequal intervals). Specifically, with the second pattern area 51a at 0 degrees, the second pattern area 51b at 90 degrees, the second pattern area 51c at 180 degrees, and the second pattern area 51d at 270 degrees.

[0107] in addition, Figures 1a-1d There is a single second pattern area, however, in other embodiments, there may be multiple second pattern areas.

[0108] In this embodiment, these (four) lenses 10 are used on the same eye. When wearing them, the wearer can sequentially wear these lenses in the aforementioned angle sequence, thereby creating a more varied circumferential stimulus to the eyeball, inhibiting the development of "drug resistance," and further improving the prevention and control of myopia and other conditions. Furthermore, regarding the wearing time, the wearer can change to a different lens in the second pattern area daily, or periodically or irregularly at other time intervals. Changing to different lenses creates a dynamic defocus effect, achieving a better prevention and control effect.

[0109] Alternatively, the wearer may choose to wear the garment in any order, regardless of the angles mentioned above.

[0110] In addition, the second pattern area is located within the optical area 1, thus it can form a more effective stimulus, thereby effectively preventing and controlling myopia and other conditions.

[0111] In addition, the second pattern area is located from the inner periphery to the edge of the optical area 1, so as to avoid forming a large number of second pattern areas at the center of the optical area 1 and to minimize the distribution of second pattern areas at the center of the optical area 1.

[0112] In addition, in this embodiment, the lens 10 also includes a weight-bearing portion 3, which can be formed by locally thickening the material of the lens (setting a thickened area). Thus, when worn, due to the action of the weight-bearing portion 3, the lens 10 will be positioned at a circumferential angle (position) that places the weight-bearing portion 3 on the lower side, thereby making it convenient for the wearer to set the wearing angle of the lens 10. The boundary between the thickened area and other areas can be smoothly transitioned.

[0113] It is understood that the weight-bearing portion in this embodiment constitutes a positioning structure for positioning the lens 10 in the circumferential direction. The form of the positioning structure is not limited to this, and more examples will be given later.

[0114] In this embodiment, the weight-bearing portion 3 is provided in the peripheral area 2. In addition, the weight-bearing portion 3 is crescent-shaped, and the arc of the crescent extends along the circumference of the lens 10, with the bending direction being the same as the bending direction of the outer peripheral edge of the circle of the lens 10 (that is, the concave and convex directions are consistent).

[0115] In addition, the weight-bearing part 3 is preferably located near the edge of the surrounding area 2.

[0116] In addition to thickening the material, a weight-bearing part 3 can also be set on the lens 10 by attaching a counterweight to the lens.

[0117] It is understood that the relative positions (angles) of the multiple second pattern areas 52a, 52b, 52c, and 52d with respect to the weight 3 in the circumferential direction are different. In this embodiment, they are 180 degrees (second pattern area 51a), 270 degrees (second pattern area 51b), 0 degrees (second pattern area 51c), and 90 degrees (second pattern area 51d) in a clockwise direction. When the wearer wears multiple lenses 10 in sequence, they can operate freely without having to specifically set the circumferential angle (position) of the lenses 10. Under the action of the weight 3, the lenses 10 will change or remain in the circumferential position (or rotation angle) that positions the weight 3 on the lower side, thus providing convenience for the operator.

[0118] In this embodiment, the lens 10 is a contact lens. However, the contact lens of this invention is not limited to this. Specifically, the contact lens of this invention 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. Among them, the rigid corneal contact lens can be a rigid non-permeable corneal contact lens, a rigid permeable corneal contact lens, or an orthokeratology lens.

[0119] In addition, the diameter of the optical zone of the corneal contact lens (preferably a contact lens in this invention) can be 6 to 12 mm, and the diameter of the optical zone of the scleral contact lens can be 6 to 12 mm.

[0120] Lenses can be daily disposable, weekly disposable, bi-weekly disposable, monthly disposable, quarterly disposable, semi-annual disposable, or yearly disposable, with daily disposable being preferred. A set of lenses can consist of 2-365 lenses or 2-7 lenses.

[0121] In this embodiment, the wearer can distinguish multiple lenses 10 by the different positions of the second pattern area. Alternatively, different colors, packaging, or markings can be used for the multiple lenses 10. These different colors, packaging, or markings can be arranged with equal central angle intervals as the second pattern area, or with different central angle intervals. For example, the shape of the lens can be drawn on the packaging to represent the second pattern area, or arrows or color markings can be provided on the lens 10 to indicate the position of the second pattern area.

[0122] In addition, in this embodiment, multiple lenses 10 are used for the same eye; however, in other embodiments, the contact lens assembly may include multiple lenses for both eyes of the same person.

[0123] Furthermore, in this embodiment, the first and second pattern areas are formed by ink printing, with the ink (pattern area) sandwiched between the two lens materials (substrate), thereby preventing ink (pigment) penetration and adverse effects on the eyeball. The formation of the first and second pattern areas is not limited to this; for example, they can also be formed by laser etching (forming a frosted glass state, etc.).

[0124] In this embodiment, the optical area 1 is circular, and the peripheral area 2 is annular (an example of an annular shape). However, the present invention is not limited to this; for example, the optical area 1 may also be elliptical, and the peripheral area 2 may be an elliptical annular (an example of an annular shape). In addition, when the present invention is applied to other contact lenses, there may be more peripheral area designs.

[0125] In summary, in this embodiment, the scattering pattern (first pattern area) set throughout the optical area is different from the scattering pattern (second pattern area) in the asymmetrical area, thereby providing different light transmittance, forming an asymmetrical contrast sensitivity distribution, thereby inhibiting axial elongation and improving the prevention and control of myopia, etc.

[0126] Furthermore, in the above description, the first pattern area is located within the optical area; however, this invention is not limited to this. As another embodiment, a ring-shaped first pattern area can be provided outside the peripheral area, surrounding the optical area. In this case, the second pattern area can be located within the first pattern area, or it can be located outside the first pattern area.

[0127] Figures 2a-2d This is a schematic diagram of the structure of multiple lenses of a contact lens assembly according to one embodiment of the present invention.

[0128] The main difference between this embodiment and the above embodiment is that the spacing distribution of the second pattern area is the same. Other structures are basically the same, and the same reference numerals are used here. The description of the same structure is omitted or simplified (the same applies below).

[0129] like Figures 2a-2d As shown, multiple lenses 10 each have a second pattern region 52a-52d, and they are distributed at unequal intervals in the circumferential direction. It is easy to understand that the unequal interval distribution here refers to any distribution of the second pattern regions 52a-52d (not limited to four, but can be more) around the optical axis of the optical region in a circumferential direction, where the interval gradually increases, gradually decreases, increases first and then decreases, or decreases first and then increases.

[0130] Figures 3a-3f This is a schematic diagram of the structure of multiple lenses of a contact lens assembly according to one embodiment of the present invention.

[0131] This implementation method and Figures 1a-1dThe main difference in the implementation methods lies in the shape and distribution of the second pattern area; otherwise, they are basically the same. For example... Figures 3a-3f As shown, the contact lens assembly of this embodiment includes six lenses 10 for the same eye, each including a second pattern area 53a-53f. The second pattern areas 53a-53f are heart-shaped (with the tip facing the center) and are evenly distributed circumferentially at 60-degree intervals.

[0132] Figures 4a-4c This is a schematic diagram of the structure of multiple lenses of a contact lens assembly according to one embodiment of the present invention.

[0133] This implementation method and Figures 1a-1d The main difference in the illustrated embodiment lies in the shape and distribution of the second patterned area. For example... Figures 4a-4c As shown, the contact lens assembly of this embodiment includes a plurality of (36, not all of which are shown) lenses 10, each of which includes a second pattern area 54a-54c, etc. These second pattern areas are circular and are distributed at equal intervals along the circumference at 10-degree intervals.

[0134] Figures 5a-5c This is a schematic diagram of the structure of multiple lenses of a contact lens assembly according to one embodiment of the present invention.

[0135] This implementation method and Figures 4a-4c The main difference in the illustrated embodiment is that, in this embodiment, the optical region 1 has a patternless central correction region 11 and a first patterned annular region 4A surrounding the central correction region. The central correction region 11 has a prescription power or 0 power for correcting visual acuity.

[0136] The diameter of the optical zone 1 can be 6 to 12 mm, and the central correction zone 11 is circular with a diameter of 1.5 to 3.5 mm.

[0137] As an alternative implementation, the central correction area can also be of other shapes, such as ellipse. In this case, its outer diameter can be 1.5-3.5 mm.

[0138] As another implementation method, in Figures 5a-5c In the lens shown, an optical region 1 has a central correction zone 11 located at the center and an annular defocus zone surrounding the central correction zone 11 (corresponding to area 4A in this embodiment). The diameter of the optical region 1 can be 6-12 mm, and the central correction zone 11 is circular with a diameter of 1.5-3.5 mm. The central correction zone 11 has a prescription optical power or 0 optical power for correcting visual acuity, and the optical power of the defocus zone is greater than or equal to that of the central correction zone 11. The first pattern area 4A is located within the entire defocus zone.

[0139] More preferably, in the embodiment shown in Figure 5, the diameter of the central correction zone 11 is smaller than the diameter of a standard human pupil. This ensures that the first and second pattern zones are always located inside the pupil of the human eye. By regulating the light flux entering the retina through the first and second pattern zones, the contrast on the retina is controlled, thereby achieving the purpose of myopia prevention and control. In other embodiments that include a central correction zone, this limiting feature—that the diameter of the central correction zone 11 is smaller than the diameter of a standard human pupil—also applies.

[0140] Figure 6 This is a schematic diagram of the lens structure according to one embodiment of the present invention.

[0141] This implementation method and Figures 5a-5c The main difference lies in the way the pattern area is set. For example... Figure 6 As shown, the lens 10 has a first pattern area 61, a second pattern area 62, and a third pattern area 63. The first pattern area 61 and the second pattern area 62 are arranged circumferentially, but the patterns between them gradually transition, meaning the boundary between them is not obvious. Specifically, the dot density of the first pattern area 61 is relatively sparse, while the dot density of the second pattern area 62 is relatively dense. In the boundary region, the dot density gradually transitions, thus making the boundary between them indistinct. Alternatively, the two patterns can have different colors or different grayscale values, with a gradual transition in color or grayscale value in the boundary region.

[0142] The first pattern area 61 and the second pattern area 62 together form a ring-shaped area, creating a patternless central correction area 11 at the center of the lens. Additionally, a third pattern area 63 is provided around the outer periphery of the first and second pattern areas 61 and 62. The light transmittance of the third pattern area 63 differs from that of the first and second pattern areas 61 and 62. For example, the third pattern area 63 may have a deeper color or grayscale value. Alternatively, the third pattern area 63 may have a denser dot matrix density.

[0143] The first pattern area 61 and the second pattern area 62 can be located in the optical area, or they can be formed across the optical area and the peripheral area. The third pattern area can be located in the peripheral area, or it can be formed across the optical area and the peripheral area.

[0144] Understandable. Figure 6 Only one lens is shown, making Figure 6 The second pattern area 62 can be rotated by a specified angle in the circumferential direction to obtain the structure of other lenses, which will not be described in detail here.

[0145] Figure 7 This is a schematic diagram of the lens structure according to one embodiment of the present invention.

[0146] like Figure 7As shown, the lens 10 has a thickened weight-bearing portion 3G, which is roughly circumferentially formed, but is wider at one end and narrower at the other end in a certain diametrical direction. That is, the weight-bearing portion 3G is formed in a shape that gradually narrows towards both sides circumferentially from a certain angle, so that the lens 10 can rotate and remain in place when worn. Figure 7 The state shown (with the vertical direction in the diagram representing the vertical direction of gravity).

[0147] Additionally, it should be noted that the vertical weight section 3G is marked with a black area in the diagram; however, this is merely for ease of illustrating the extent and shape of the vertical weight section 3G, and does not imply that the vertical weight section 3G necessarily has a color. Similarly, in other diagrams, the boundaries of the vertical weight section or other areas are depicted with lines, but this does not mean that these lines must be present in the actual product.

[0148] In addition, such as Figure 7 As shown, the lens 10 has a first pattern area 4A and a second pattern area 56. The first pattern area 4A covers the entire area outside the vertical support portion 3G and is approximately circular. The second pattern area 56 is located within the first pattern area 4A and is approximately oval. In this embodiment, the first pattern area 4A has a regular dot matrix, while the second pattern area 56 has an irregular dot matrix.

[0149] Alternatively, as another implementation, the first pattern area may have an irregular dot matrix, the second pattern area may have a regular dot matrix, or both may have an irregular or regular dot matrix.

[0150] Furthermore, the shape of the pattern area here is merely an example. Other shapes can also be used in this invention. For example, the second pattern area can also be a heart shape, a circle, a triangle, a rhombus, a square, or other polygons.

[0151] In addition, Figure 7 The structure of other lenses in the contact lens assembly can be obtained by rotating the second pattern area 56 in the circumferential direction by a specified angle, which will not be described in detail here.

[0152] Figure 8 This is a schematic diagram of the lens structure according to one embodiment of the present invention.

[0153] This implementation method and Figure 7The main difference lies in the fact that the first pattern area 4B is an annular circle, with a patternless central correction area formed inside; the pattern of the second pattern area 57 is a grid pattern (the main difference between a grid pattern and a dot matrix pattern is that the grids in a grid pattern are connected). It is understood that the grids in the grid pattern are not limited to squares; nor are they limited to black grids, but can also be other colors or shades of gray. Furthermore, in this embodiment, a staggered arrangement of two grids (black + transparent) is used. However, other methods can also be used, such as using lines to define the grids (e.g., black grids separated by transparent lines).

[0154] In addition, Figure 8 The structure of other lenses in the contact lens assembly can be obtained by rotating the second pattern area 57 in the circumferential direction by a specified angle, which will not be described in detail here.

[0155] Figures 9a-9d This is a schematic diagram of the structure of multiple lenses of a contact lens assembly according to one embodiment of the present invention.

[0156] The main difference between this embodiment and the above-described embodiment lies in the location of the second pattern area. For example... Figures 9a-9d As shown, each of the multiple lenses 10 has a second pattern area 55a-55d, which is circular and is disposed in the peripheral area 2. In addition, the second pattern areas 55a-55d are close to (adjacent to) the edge of the optical area 1 (the first pattern area in the optical area 1 is not shown).

[0157] In addition, the contact lens assembly of this embodiment includes 36 lenses 10, and the second pattern areas between the multiple lenses 10 are distributed at 10-degree intervals.

[0158] In addition, such as Figures 9a-9d As shown, in this embodiment, the lens 10 has a weight-bearing portion 3, which is crescent-shaped, and one of its arcs coincides with the outer edge of the circular area of ​​the lens 10 (the outer edge of the peripheral area).

[0159] In the above embodiments, some examples have been given of the number of lenses 10 included in the contact lens assembly. The present invention is not limited to these examples. For example, the number can be freely set in the range of 2-36, or in the range of 2-7.

[0160] The following describes some other embodiments of the positioning structure. Additionally, it can be understood that the positioning structure, used to position the lens in the circumferential direction, may also be used independently of the aforementioned patterned area in other applications.

[0161] Figure 10 This is a schematic diagram of the lens structure according to one embodiment of the present invention.

[0162] like Figure 10 As shown, the lens 10 has a thickened region 31a and a thinned region 31b, which are positioned opposite each other across the center of the lens 10 (180 degrees apart circumferentially). Thus, the thickened region 31a and the thinned region 31b constitute a positioning structure that allows the lens 10 to be positioned circumferentially. Specifically, when the lens is worn, because the thickened region 31a is relatively heavier and the thinned region 31b is relatively lighter, the lens will rotate or remain in a circumferential position where the thickened region 31a is on the lower side and the thinned region 31b is on the upper side.

[0163] Figure 11 This is a schematic diagram of the lens structure according to one embodiment of the present invention.

[0164] like Figure 11 As shown, the lens 10 has a weight-bearing portion 3A, which is fan-shaped and located in the peripheral region 2 at its outer edge. As described above, the weight-bearing portion 3A can be formed by locally thickening the lens. In this embodiment, the width of the weight-bearing portion 3A is within a 40-degree central angle range.

[0165] In addition, the radial range of the fan-shaped annular weight portion 3A can be set as follows: within a range of 7mm to 15mm in diameter from the center optical area, preferably 8mm to 14mm, and more preferably within a range of 9mm to 13mm.

[0166] In addition, the area of ​​the weight-bearing part 3A can be set as follows: not limited to the above-mentioned 40 degrees, the angle between the edges of the weight-bearing part 3A in the circumferential direction is 10° to 180°, preferably 20° to 140°, and more preferably 30° to 110°.

[0167] Figure 12 This is a schematic diagram of the lens structure according to one embodiment of the present invention. This embodiment is related to... Figure 11 The main difference in the embodiment shown is that the width of the vertical weight 3B is within an 80-degree central angle range.

[0168] Figure 13 This is a schematic diagram of the lens structure according to one embodiment of the present invention. This embodiment is related to... Figure 11 The main difference in the embodiment shown is that the width of the vertical weight 3C is within a 180-degree central angle range.

[0169] Figure 14 This is a schematic diagram of the lens structure according to one embodiment of the present invention. This embodiment is related to... Figure 11The main difference in the illustrated embodiment is that it has two 3D weight-bearing sections, which are spaced apart circumferentially. Furthermore, the two 3D weight-bearing sections are symmetrically arranged. Alternatively, more weight-bearing sections can be provided; the structures of these sections can be identical or different. For example, three (an odd number) weight-bearing sections can be provided, with the two outermost sections symmetrical and the middle section having a different structure (e.g., shape) from the other two.

[0170] Figure 15 This is a schematic diagram of the lens structure according to one embodiment of the present invention. This embodiment is related to... Figure 14 The main difference in the illustrated embodiment is that the weight-bearing portion 3E is elliptical. Furthermore, in this embodiment, the longer side of the ellipse of the weight-bearing portion 3E extends approximately circumferentially along the lens 10, and the shorter side extends approximately radially along the lens 10. As a variation, more elliptical weight-bearing portions may be provided.

[0171] The range of the weight-bearing part 3E in the radial direction of the lens is set as follows: with the center of the optical zone as the center, the diameter is within the range of 7mm to 15mm, 8mm to 14mm, or 9mm to 13mm.

[0172] Choose an ellipse length (major axis) of 3–8 mm, preferably 3.5–7 mm, and even more preferably 4–6 mm. Choose an ellipse width (minor axis) of 1–5 mm, preferably 1.5–4.5 mm, and even more preferably 2–4 mm.

[0173] The distance (closest point) between the multiple elliptical weight-bearing parts and the outer edge of the lens is 0.01–0.3 mm, 0.03–0.2 mm, or 0.05–0.15 mm.

[0174] Figure 16 This is a schematic diagram of the lens structure according to one embodiment of the present invention. This embodiment is related to... Figure 10 The main difference in the illustrated embodiment is that the thickened region 32a and the thinned region 32b are fan-shaped annular. Furthermore, their widths (the range they occupy in the circumferential direction) are within a 90-degree central angle range (area).

[0175] This embodiment divides the lens edge (peripheral area) into 4 quadrants, and the cross-sectional view of the thickened area at the lens edge (along...) Figure 16 Looking at the diameter line in the top and bottom direction, the maximum size range of the thickened area is selected as 0.2 to 0.7 mm, preferably 0.25 to 0.6 mm, and more preferably 0.3 to 0.5 mm; the minimum size range of the thinned area is selected as 0.05 to 0.4 mm, preferably 0.1 to 0.35 mm, and more preferably 0.15 to 0.3 mm.

[0176] The division of the four quadrants is not limited to four equal parts (90 degrees). The thickening zone range can be selected from 50° to 130°, with a preference for 65° to 115° and a more preferred range of 80° to 100°. The thinning zone range can be selected from 50° to 130°, or 65° to 115°, or 80° to 100°.

[0177] Thickened and thinned areas can be symmetrically distributed (including areas with the same circumferential size), or they can be asymmetrically distributed.

[0178] Figure 17 This is a schematic diagram of the structure of a lens according to one embodiment of the present invention; Figure 18 yes Figure 17 Schematic diagram of the cross section at line AA; Figure 19 yes Figure 17 A cross-sectional schematic diagram at the BB line. The main difference between this embodiment and the above embodiment is the different formation method of the positioning structure. Specifically, in this embodiment, the thickness of the peripheral region 2 of the lens 10 increases from one side in a certain radial direction (e.g., Figure 17 The lower edge of the lens extends vertically past the center of the lens to the other side (e.g., the lower edge of the lens). Figure 17 The upper edge of the middle section changes gradually.

[0179] Reference Figure 18 , Figure 19 Lens 10 in the surrounding area 2 Figure 17 The thickness T2 of the lower edge is greater than the thickness T1 of the upper edge. Furthermore, the thickness distribution of the peripheral region 2 corresponds to the radial diameter (e.g.,...). Figure 17 The diameter extending vertically is symmetrical around the center, as shown in the reference. Figure 19 Surrounding area 2 ( Figure 17 The thicknesses T2 and T3 of the left and right sides of the middle section are equal.

[0180] In this embodiment, the upper and lower edges of the entire lens gradually transition, resulting in a non-uniform thickness distribution at the upper and lower edges, exhibiting a gradual trend. This transition occurs at the lower part of the lens. Figure 17 The thickness is at its thickest point in the horizontal direction, and then gradually decreases in two directions at a fixed ratio until the top of the lens is the thinnest point. The horizontal direction has a uniform and stable thickness distribution. The purpose is to achieve a gradual transition in lens weight distribution, so that while achieving weight positioning, there is no obvious thickening zone in the lens thickness, thus improving comfort.

[0181] Furthermore, this design in this embodiment can divide the lens into two quadrants, with the upper half thinned and the lower half thickened. In the cross-sectional view of the thickened area at the lens edge (cut along the diameter line in the vertical direction), the maximum size range of the thickened area is selected to be 0.2–0.7 mm, preferably 0.25–0.6 mm, and more preferably 0.3–0.5 mm. The minimum size range of the thinned area is selected to be 0.05–0.4 mm, preferably 0.1–0.35 mm, and more preferably 0.15–0.3 mm.

[0182] Figure 20 This is a schematic diagram of the lens structure according to one embodiment of the present invention. The main difference between this embodiment and the above-described embodiments is that, in the above embodiments, the positioning structure includes a thickened portion, while in this embodiment, the positioning structure includes two thinned portions 33a and 33b. (Refer to...) Figure 20 Two thinned portions 33a and 33b are positioned opposite each other along a certain diameter of the lens 10, separated by a gap from the center of the lens 10. Thus, the lens 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, the lens is designed with uneven thickness. This allows the thicker edge to automatically rotate to the area not covered by the eyelid, while the thinner edge rotates to the upper or lower side covered by the eyelid, thereby positioning the lens 10.

[0183] Furthermore, in this embodiment, the widths of the thinned portions 33a and 33b are set such that the width L1 in the chord direction is 8 to 14 mm, preferably 8.5 to 13 mm, and more preferably 9 to 12 mm. The distance between the thinned portions 33a and 33b is set such that, in the direction of the aforementioned "certain diameter," the closest interval L2 between them is 7.5 to 14 mm, preferably 8 to 12.5 mm, and more preferably 8.5 to 11 mm.

[0184] Figure 21 This is a schematic block diagram of the structure of a contact lens manufacturing equipment according to one embodiment of the present invention. Figure 22a , Figure 22b This is a schematic diagram of the structure of the punch in the manufacturing equipment, in which... Figure 22a This is a side view diagram. Figure 22b This is a top-down view. Figure 23a , Figure 23b This is a schematic diagram of the die cavity in the manufacturing equipment, in which... Figure 23a This is a side view diagram. Figure 23b This is a top-down view. Figure 24 This is a flowchart illustrating a method for manufacturing a contact lens according to one embodiment of this utility model. The following is a description of the process. Figure 21 Figure 23 illustrates the manufacturing equipment and manufacturing method involved in specific embodiments of this utility model.

[0185] Reference Figure 21 The contact lens manufacturing equipment 100 includes a control unit 101, a punch 102 (also called a male mold), a die 103 (also called a female mold), a robot arm 104 (an example of a handling mechanism and an example of a rotating mechanism), a mold closing device 105, a molding liquid supply mechanism 106 (including a mechanism for supplying molding liquid to the punch and a mechanism for supplying molding liquid to the die), a printing mechanism 107, a camera 108 (camera), and a curing box 109.

[0186] In this embodiment, the control unit 101 is a programmable controller, which is used to communicate with other unit mechanisms and generate various control instructions to control other unit mechanisms, thereby executing the manufacturing process.

[0187] The punch 102 and the die 103 are combined to form a cavity, which can be pressed together to form a lens. A Mark 102a is provided on the punch 102, and a Mark 103a is provided on the die 103. Marks 102a and 103a are used to indicate the circumferential position (rotation angle) of the punch 102 and the die 103. The image information obtained by the camera 108 allows the control unit 101 to identify the circumferential position (rotation angle) of the punch 102 and the die 103.

[0188] The robotic arm 104 is used to move the punch 102, the die 103, or a mechanism for holding them. It can also be used to rotate the punch 102 (or the die 103) to a desired circumferential position.

[0189] The mold clamping device 105 is used to press the punch 102 and the die 103 together to form a lens (the aforementioned lens 10) of the desired shape.

[0190] The molding fluid supply mechanism 106 supplies molding fluid to the punch and die. The molding fluid is a lens molding material used to mold lenses (substrate). Here, the mechanism for supplying molding fluid to the punch and the mechanism for supplying molding fluid to the die can be the same mechanism or separate mechanisms. Furthermore, the molding fluid supplied to the punch and the molding fluid supplied to the die can be the same or different.

[0191] The printing mechanism 107 is used to form patterned areas (the first patterned area and / or the second patterned area mentioned above) on the lens by printing with ink (pigment). In this embodiment, the patterned area may also be referred to as a pattern.

[0192] The curing chamber 109 is used to cure the molding liquid and / or pattern, thereby setting it in place. Curing efficiency can be improved in the curing chamber by means of heating or other methods. Additionally, curing efficiency can also be improved by irradiation.

[0193] The following describes the method for manufacturing contact lenses (in this embodiment, contact lenses) for myopia control, based on the structural elements of the aforementioned manufacturing equipment. The method mainly includes the following steps:

[0194] S10: Place the punch 102 of the mold along with the incoming material tray in the loading position of the equipment (that is, place multiple punches in the incoming material tray and place the incoming material tray in the loading position), and place the die 103 of the mold in the die hopper of the vibrating plate (that is, the die can be vibrated and loaded by the vibrating plate).

[0195] S20: The electronic tag (e.g., paper) transmits the order information (including the number of lenses, specifications, etc.) to the programmable controller of the device (an example of control unit 101) via a sensing device (e.g., a barcode scanner);

[0196] S30: The programmable controller of the equipment retrieves order information, and the camera 108 of the vision recognition system takes a picture of the punch 102 to identify the position of the Mark (indicator mark, used to indicate the circumferential position of the punch) 102a on the punch 102. Then, the robot (an example of a punch rotation mechanism) rotates the punch 102 to the corresponding angle (predetermined angle) according to the order information, places the punch in the printing area (printing station), and fixes it by, for example, vacuum suction. The molding liquid supply mechanism 106 applies molding liquid to it to form a substrate. The printing mechanism 107 prints patterns on the substrate using ink, thereby forming a patterned area. In conjunction with the following description, in this embodiment, two lenses (substrate) are used to wrap (cover) the pigment layer, thereby reducing the risk of pigment penetration to the human eye and improving safety.

[0197] S40: The printed emboss 102 is placed into the curing chamber 109 by a conveying device (e.g., robot 104) for heat curing of the pattern; here, after printing the pattern of multiple lenses (multiple emboss 102 are printed), the multiple emboss 102 are placed together on the carrier plate and then cured.

[0198] S50: After curing, the punch 102, together with the carrier plate, is transported by a robot to the punch storage position of the die clamping device 105 (pressing mechanism, pressing device);

[0199] S60: The mold closing device 105 transports the pre-placed concave mold 103 to the liquid injection position (liquid injection station) by the robot arm 104. In this embodiment, the liquid injection position is located on a material tray that can hold multiple concave molds 103. In addition, the pressing of the concave mold 103 (the mold closing with the punch) also takes place on the material tray.

[0200] S70: Liquid monomers (molding fluids, such as HEMA, NVP, MA, etc.) are injected or filled into the cavity mold 103 through the molding fluid supply mechanism 106;

[0201] S80: Camera 108 takes pictures of punch 102 and die 103 respectively, and transmits them to control unit 101 to identify the Mark (indicator mark) position on punch 102 and die 103. Robot arm 104 (an example of punch rotation mechanism) grabs the identified punch 102 from punch bin according to the control command (generated by control unit 101) corresponding to the picture recognition result, moves it above the identified die 103, and rotates punch 102 to the required angle position (predetermined angle) so that it is in a predetermined relative circumferential position with die 103 (e.g., so that the Marks of the two coincide). In this state, control unit controls mold closing device 105 to press punch 102 and die 103 together.

[0202] S90: Repeating the above related processes can produce multiple lenses (semi-finished products) of different specifications (mainly due to differences in the relative circumferential positions of the pattern areas). Then, the entire die-cast mold is conveyed to a curing chamber via a conveyor belt, where the liquid monomer is heated and cured to complete the lens production.

[0203] The molding fluid on the punch and the molding fluid on the die can be the same or different.

[0204] The automated manufacturing method for contact lenses (e.g., colored contact lenses) described above can significantly reduce the manufacturing time and cost associated with contact lens assemblies containing multiple lenses with different circumferential positions of their second pattern areas. Using a convex mold mark, a concave mold mark, and an electronic identification tag, a visual recognition system provides precise rotational alignment and pressing of the convex and concave molds, achieving a production schedule similar to that of conventional contact lenses. In particular, the visual recognition system's positioning replaces manual placement of the marked convex mold, and the marking of the concave mold reduces equipment downtime. This manufacturing method allows for the production of small-batch and large-batch orders with different lens parameters and quantities, achieving the same production efficiency as large-batch lens production. Once one type of lens is produced, the equipment sensors retrieve the new lens specifications and quantity from the next electronic identification tag to produce lenses of different specifications, achieving continuous production without stopping the equipment.

[0205] The manufacturing method and equipment provided in this embodiment can inject liquid monomer into a molding die and assemble the punch and die of the die, and ensure precise and controllable rotational alignment and pressing between the punch and die. This embodiment provides an automatic method for changing the rotational alignment of the punch and die assembly, and can achieve multiple lens designs without stopping the machine, saving manual mold placement time and without changing the pad printing template. The printing position of the pattern is determined by the recognition system camera taking pictures of the punch and recognizing the Mark on the punch and the placement position of the robot arm, and holding the punch in the appropriate position of the printing process so that the pattern in the corresponding position can be printed, thereby obtaining lenses with different defocus amounts according to different patterns.

[0206] In addition, the device and method provided in this embodiment wrap the patterned area with two substrates, thereby reducing the adverse effects of pigment penetration on the eyes.

[0207] In addition, the equipment and method of this embodiment, for example, can greatly reduce manufacturing time and cost compared to the method of manually placing positioning female mold, male mold and material tray marks to make lenses, which requires positioning marks for both the material tray and the mold.

[0208] In step c, the punch 102 is rotated to the desired circumferential position instead of rotating the molding fluid supply mechanism 106 (part of it), thus simplifying the structure. That is, the punch 102 can be rotated using the robot arm 104, without providing a rotating mechanism on the molding fluid supply mechanism 106, thus simplifying the structure.

[0209] It is understood that, as other implementation methods, some of the above-mentioned processes can be performed in a different order. For example, the operations on the die and the punch can be performed sequentially or in parallel.

[0210] This utility model also provides a computer program and product, a storage medium storing the program, and a computing device having a memory (storing the program) and a processor. When the computer program is executed by a computer (such as the control unit 101 described above), it can realize the manufacturing method described above.

[0211] Here, the functions of a computing device can be implemented by a processor executing a program (software), or by hardware such as LSI (Large Scale Integration) and ASIC (Application Specific Integrated Circuit), or by a combination of software and hardware.

[0212] The following is a summary of the embodiments of this utility model:

[0213] This invention provides a corneal contact lens with an asymmetrical pattern, particularly a colored contact lens. An asymmetrical area is provided within (preferably) or outside the optical zone of the corneal contact lens. The pattern or design on this asymmetrical area provides different light transmittance than the patterns or designs in other areas, resulting in different contrast of the image projected onto the retina by the lens, and consequently, different contrast sensitivity on the retina. By periodically or irregularly changing and wearing lenses with asymmetrical areas in different positions, a dynamic defocusing effect or dynamic contrast sensitivity can be achieved, thus achieving better control.

[0214] Furthermore, this utility model provides a manufacturing apparatus and method for preparing contact lenses with asymmetrical patterns. Through automated methods, colored contact lenses with dynamic myopia control can be produced. This effectively solves the problems and shortcomings of existing products. These lenses offer better myopia control and optical quality, reduce aberrations, and feature a daily disposable design, making them more comfortable and convenient to wear, suitable for daily activities. Advantages include comfort, oxygen permeability, easy adaptation, daily disposable design, no need for storage, care, or cleaning, and better myopia control with longer wearing time.

[0215] Based on the above description, this utility model can have the following forms:

[0216] This invention provides a corneal contact lens (preferably a colored contact lens) assembly with an asymmetrical pattern, comprising at least two lenses suitable for the same eye or two different lenses suitable for a pair of eyes. Each lens has a central optical zone and a peripheral zone surrounding the optical zone. The optical zone or peripheral zone has a first pattern area with a first pattern and a second pattern area with a second pattern, and the first and second pattern areas provide different light transmittance, contrast sensitivity, or defocus. This creates an asymmetrical contrast sensitivity distribution, thereby inhibiting axial elongation and achieving effective myopia control.

[0217] The first pattern provided by the first pattern area is a dot matrix pattern that can produce light scattering, for example, a regular arrangement of individual dots; the second pattern provided by the second pattern area is a dot matrix pattern that can produce light scattering. The individual dot matrix patterns in the two areas are the same, but the arrangement is different. Alternatively, the individual dot matrix patterns in the two areas are different, but the arrangement is the same, or the individual dot matrix patterns in the two areas are different, and the arrangement is also different.

[0218] The outer contour shape of the second pattern area can be: bubble or teardrop shape, heart shape, circle, ellipse, triangle or parallelogram, or other symmetrical polygons, asymmetrical polygons, or any other arbitrary shape.

[0219] There can be one or more second pattern areas. Multiple second pattern areas formed on at least two lenses are distributed at equal intervals or symmetrically around the optical axis of the optical region in a circumferential direction. Thus, by wearing different lenses at different times or on different dates, the contrast sensitivity and defocus signal dynamically change in an orderly manner along the circumferential direction around the optical axis. For example, the second pattern areas are arranged at equal intervals with central angles of 0°, 90°, 180°, and 270°.

[0220] The second pattern area is formed on at least two lenses. Multiple second pattern areas are distributed at different intervals or asymmetrically around the optical axis of the optical area in a circular direction. In this way, by wearing different lenses at different times or on different dates, the contrast sensitivity and defocus signal change randomly and dynamically in a circular direction around the optical axis.

[0221] The light transmittance of the second pattern area is greater than or less than that of the first pattern area.

[0222] Multiple second pattern regions formed on at least two lenses can be equally spaced or symmetrically distributed around the optical axis of the optical region along the circumferential direction, and the central angle between two second pattern regions is 360° / N, where N is a natural number greater than 2. N is preferably [2, 36].

[0223] The number of the at least two lenses is preferably [2, 36], and more preferably [2, 7].

[0224] The peripheral area is also provided with a weight structure to keep the lens in a stable position when worn. The weight structures of different lenses are located in the same position, but their relative positions to the second pattern area are different.

[0225] The contact lens is a scleral contact lens or a corneal contact lens; preferably, the contact lens is a corneal contact lens, which is 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.

[0226] The diameters of the optical components of the corneal contact lens and the optic components of the scleral contact lens are both 6–12 mm.

[0227] The contact lens includes an optical area located in the central region of the lens. The diameter of the optical part is 6-12mm. The first pattern area corresponds to the shape of the optical area (i.e., it completely covers the optical area). The second pattern area is located in the optical area and is disposed near its edge. Alternatively, it can be understood that the second pattern area is superimposed on the first pattern area and is disposed near its edge.

[0228] The contact lens includes an optical zone located in the central region of the lens, the diameter of which is 6 to 12 mm. At the center of the optical zone is a central correction zone, which is usually circular or elliptical and has a diameter of 1.5 to 3.5 mm (the central correction zone has a prescription power or 0 power with corrected vision), and a first annular pattern area arranged around the central correction zone. The second pattern area is located within the first pattern area.

[0229] The contact lens includes an optical zone located in the central region of the lens and a peripheral zone (peripheral area) located radially outward of the optical zone. The diameter of the optical part is 6 to 12 mm. A first annular pattern area is provided around the optical zone on the outside of the peripheral area, and a second pattern area is located within the first pattern area.

[0230] The contact lens substrate includes a first substrate and a second substrate, with the first patterned area and the second patterned area located between the first substrate and the second substrate; preferably, the first patterned area and the second patterned area are encapsulated between the first substrate and the second substrate and are covered by the first substrate and the second substrate.

[0231] The contact lens includes at least two lenses, each having a different color, packaging device, or marking symbol.

[0232] The different colors, packaging devices, or markings of the at least two lenses are arranged at equal central angle intervals according to the second pattern area.

[0233] The different colors, packaging devices, or markings of the at least two lenses are arranged according to different central angle intervals formed by the second pattern area.

[0234] This utility model provides a method for wearing contact lenses, in which the wearer wears the lenses in sequence according to a pattern formed by the different colors, packaging devices, or markings of at least two lenses.

[0235] The method and apparatus are based on the same concept. Since the methods and apparatus solve problems in similar ways, the implementation of the apparatus and the method can be referred to each other, and the repeated parts will not be described again.

[0236] The terms “first, second, third, etc.” or similar terms such as module A, module B, and module C used throughout this application are only used to distinguish similar objects and do not represent a specific ordering of objects. It is understood that a specific order or sequence can be interchanged where permitted.

[0237] Throughout this application, the reference numerals for the steps are not necessarily used in accordance with the steps. The order of the steps may be interchanged or performed simultaneously, where permissible.

[0238] The term "comprising" as used throughout this application should not be construed as limiting itself to the contents listed below; it does not exclude other structural elements or steps. Therefore, it should be interpreted as specifying the presence of the mentioned technical features, integrals, steps, or components, but does not exclude the presence or addition of one or more other technical features, integrals, steps, or components and groups thereof.

[0239] It is understood that those skilled in the art can combine the features mentioned in one or more embodiments throughout this application with features from other embodiments in any appropriate manner to implement this application.

[0240] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the technical concept of this application, all of which fall within the scope of protection of this application.

Claims

1. A contact lens assembly having an asymmetrical pattern, comprising a lens, characterized in that, At least on the optical area of ​​the lens, there is a first pattern area with a first pattern and a second pattern area with a second pattern, and the first pattern and the second pattern provide different light transmittance.

2. The contact lens assembly according to claim 1, characterized in that, The first pattern provided by the first pattern area is a dot matrix pattern capable of generating light scattering, and the second pattern provided by the second pattern area is a dot matrix pattern capable of generating light scattering. The first pattern area and the second pattern area have the same individual dot matrix pattern but different arrangement, or the first pattern area and the second pattern area have different individual dot matrix patterns but the same or different arrangement.

3. The contact lens assembly according to claim 1, characterized in that, The outer contour shape of the second pattern area is: bubble shape, teardrop shape, heart shape, circle, ellipse, symmetrical polygon, or asymmetrical polygon.

4. The contact lens assembly according to claim 1, characterized in that, The second pattern area and the first pattern area are gradually connected.

5. The contact lens assembly according to claim 1, characterized in that, The second pattern area can be one or more.

6. The contact lens assembly according to claim 1, characterized in that, There are multiple lenses, and the second pattern areas of the multiple lenses are distributed at equal intervals or symmetrically around the optical axis of the optical area in the circumferential direction.

7. The contact lens assembly according to claim 6, characterized in that, The second pattern area between multiple lenses is distributed at equal intervals along the circumferential direction around the optical axis of the optical area with a central angle of 360° / N, where N is a natural number and its value ranges from 2 to 36.

8. The contact lens assembly according to claim 1, characterized in that, The lens has multiple lenses, and the second pattern area between the multiple lenses is distributed at different intervals or asymmetrically along the circumferential direction around the optical axis of the optical area.

9. The contact lens assembly according to claim 8, characterized in that, The second pattern areas between the multiple lenses are distributed around the optical axis of the optical area in any one of the following directions: the interval gradually increases, the interval gradually decreases, the interval first increases and then decreases, or the interval first decreases and then increases.

10. The contact lens assembly according to claim 1, characterized in that, The light transmittance of the second pattern area is greater than or less than that of the first pattern area.

11. The contact lens assembly according to claim 1, characterized in that, It includes 2-36 lenses, or 2-7 lenses.

12. The contact lens assembly according to claim 1, characterized in that, The lens has a positioning structure that positions it circumferentially relative to the eyeball when worn.

13. The contact lens assembly according to claim 12, characterized in that, The positioning structure includes a weight-bearing portion, which has at least one of the following features: The weight-bearing part is disposed in the peripheral area around the optical area, and the relative position of the weight-bearing part between multiple lenses and the second pattern area in the circumferential direction is different. The weight-bearing portion is formed by providing a thickened area in the peripheral region; The weight-bearing part is located at the edge of the lens. There are one or more weight-bearing parts, and multiple weight-bearing parts are symmetrically arranged. The shape of the weight-bearing part is fan-shaped, ring-shaped, crescent-shaped, circular, or flattened. Two or more elliptical weight-bearing portions, wherein the major axis of the plurality of elliptical weight-bearing portions extends circumferentially along the lens and the minor axis extends radially along the lens.

14. The contact lens assembly according to claim 12, characterized in that, The positioning structure includes a thickening region and a thinning region, which are arranged opposite each other along a certain diameter direction of the lens, separated by the center of the lens; or, the thickening region and the thinning region are symmetrically or asymmetrically distributed.

15. The contact lens assembly according to claim 12, characterized in that, The thickness of the peripheral region of the lens gradually decreases from one side of the radial direction across the center of the lens to the other side, thereby forming the positioning structure.

16. The contact lens assembly according to claim 12, characterized in that, The positioning structure includes at least two thinning zones, which are arranged opposite each other across the center of the lens in a certain radial direction.

17. The contact lens assembly according to any one of claims 1-16, characterized in that, The 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, wherein the rigid corneal contact lens is a rigid non-gas-permeable corneal contact lens, a rigid gas-permeable corneal contact lens, or an orthokeratology lens. The diameter of the optical zone of the corneal contact lens is 6-12 mm, and the diameter of the optical zone of the scleral contact lens is 6-12 mm.

18. The contact lens assembly according to any one of claims 1-16, characterized in that, The first pattern area covers the entire optical area, and the second pattern area is located within the optical area and near its edge.

19. The contact lens assembly according to any one of claims 1-16, characterized in that, The optical area has a central correction zone located at the center and a first annular pattern zone surrounding the central correction zone. The second pattern zone is located within the first pattern zone. The central correction zone has a prescription optical power or 0 optical power for correcting visual acuity.

20. The contact lens assembly according to any one of claims 1-16, characterized in that, The optical area has a central correction zone located at the center and a ring-shaped defocus zone surrounding the central correction zone. The central correction zone has a prescription optical power or 0 optical power for correcting visual acuity. The optical power of the defocus zone is greater than or equal to that of the central correction zone. The first pattern area is located within the defocus zone.

21. The contact lens assembly according to any one of claims 1-16, characterized in that, The contact lens includes a first substrate and a second substrate, with the first patterned area and the second patterned area being enveloped between the first substrate and the second substrate.

22. The contact lens assembly according to any one of claims 1-16, characterized in that, It includes multiple lenses, which have different colors, packaging, or markings.

23. The contact lens assembly according to claim 22, characterized in that, The different colors, packaging, or markings among the multiple lenses are arranged at equal or different central angle intervals according to the second pattern area.

24. The contact lens assembly according to any one of claims 1-16, characterized in that, The first pattern and / or the second pattern are colored.

25. The contact lens assembly according to any one of claims 1-16, characterized in that, The lenses are available in daily, weekly, bi-monthly, monthly, quarterly, semi-annual, or annual disposable types.

26. A manufacturing apparatus for producing a contact lens assembly according to any one of claims 1-25, characterized in that, It includes a die, a punch, a first molding fluid supply mechanism, a second molding fluid supply mechanism, a printing mechanism, a pressing mechanism, and a control unit. Under the control of the control unit, the first molding liquid supply mechanism applies the first molding liquid to the punch to form the first substrate, and the printing mechanism forms the first pattern area and the second pattern area on the first substrate by ink printing. In addition, the second molding liquid supply mechanism provides the second molding liquid to the die, and the pressing mechanism presses the punch and the die together to form the lens. The lens includes the first substrate and the second substrate formed by the second molding liquid, and the first pattern area and the second pattern area formed by the ink are covered between the first substrate and the second substrate.

27. The manufacturing equipment according to claim 26, characterized in that, It also includes a camera, as well as a punch rotation mechanism and / or a die rotation mechanism. Indicator marks indicating circumferential position are respectively provided on the die cavity and the punch. The camera is used to capture images of the concave mold and the convex mold, generating concave mold image information and convex mold image information. The control unit receives concave mold shooting information and convex mold shooting information from the camera. The control unit generates a first control command based on the die-image information, instructing the punch rotation mechanism to rotate the punch to a first predetermined angle. In this state, the printing mechanism forms a second pattern area on the punch, such that the second pattern area and the indicator mark on the punch are separated by a predetermined angle in the circumferential direction. The control unit generates a second control command based on the punch and die imaging information, instructing the punch rotation mechanism and / or die rotation mechanism to position the punch and die at a predetermined relative circumferential position. The control unit causes the pressing mechanism to press the punch and die, which are in predetermined relative circumferential positions.

28. The manufacturing equipment according to claim 27, characterized in that, The indicator mark is formed by a notch.

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