Contact lens

Abstract

A contact lens comprising: an upper portion of the contact lens; a lower portion of the contact lens; a lens portion; and a lens positioned in the upper portion of the contact lens, the lens having a thickness greater than a thickness of the lens portion at its center, such that the lens provides eyelid attachment of the contact lens to the upper eyelid of the wearer by the lens interacting with the Hertel's papilla of the upper eyelid of the wearer, which interaction allows the contact lens to translate upwards when looking downwards, thereby providing central placement of different optical portions of the contact lens on the cornea and pupil of the wearer when the line of sight of the wearer changes and providing rotational stability of the contact lens in all gaze directions, the lens having a top surface having a shape from the group of: flat, flat with rounded corners, concave, convex or conical with a portion that gets thicker the closer it gets to the edge of the contact lens, or a combination thereof, and / or the lens having a crescent shape on a horizontal plane, and / or the lens being composed of multiple lens portions.

Description

[0001] This application is a divisional application of the application filed on August 25, 2017, with application number 201780070220.3 (international application number PCT / US2017 / 048617) and entitled "Contact lens including a lens in the upper part of a contact lens".

[0002] Cross-references to related applications

[0003] This application claims priority and benefit to U.S. Patent Application Serial No. 15 / 274,159, filed September 23, 2016, which claims benefit to U.S. Provisional Application No. 62 / 222,376, filed September 23, 2015, the entire contents of which are incorporated herein by reference. Background Technology

[0004] Current rotational stabilization technologies include back surface tortuosity (effective for rigid gas-permeable contact lenses), base-down and peripheral ballast prisms, or dynamic stabilization (as a modification of base-down prisms). For some patients, one or none of the existing designs is sufficient to provide rotational stabilization for the contact lens.

[0005] Traditionally, rigid gas permeable (RGP) contact lenses are fitted with an "eyelid attachment" fit, either by using the naturally thicker edge of a negative RGP contact lens or by adding a load body lens (the thicker edge) to a positive RGP contact lens. The shape used in conventional RGP lenses likely depends heavily on the shapes that could be manufactured when eyelid attachment was first described in the 1970s. With these conventional lenses, a thicker edge can be found that surrounds the lens periphery in 360°. However, to achieve eyelid attachment, the lens doesn't necessarily need to be that shape, and other shapes and designs can provide a better fit that allows the contact lens to translate upwards when looking down. This translation of the lens when looking down allows for true bifocal telephoto power in the upper middle portion of the lens and near angles in the lower portion. Furthermore, eyelid attachment fits provide rotational stability for toric lenses and other applications.

[0006] Therefore, what is desired is a contact lens that overcomes some of the problems in the art as described above. Summary of the Invention

[0007] This document discloses and describes a soft contact lens with eyelid attachment. The portion for eyelid attachment (i.e., the lens) is placed only on the top (upper) surface of the contact lens. With modern manufacturing capabilities, any number of shapes can be achieved to complete the eyelid attachment.

[0008] This disclosure relates to translational bifocal, trifocal, or multifocal contact lenses that function when the cornea is spherical or tortuous. For rotational stability, the contact lenses disclosed herein offer advantages over base-down prisms, peripheral ballast, and dynamic stability because they stabilize the contact lens using the interaction between the lens appearance (described below) and the tarsal plate of the upper eyelid, and also utilize the interaction between the base of the prism and the lower eyelid. The interaction between the lens and one or both eyelids provides better stability in the lens design disclosed herein. This same contact lens design also allows for translational movement of the contact lens as the patient transitions from looking straight ahead to looking downwards. As with prior art attempts, this design does not push the prism base in the contact lens upwards via the lower eyelid, but rather pulls the contact lens upwards via the upper lens appearance. This is because the lens appearance allows the contact lens to use an "eyelid attachment" fit, where the lens remains attached to the upper eyelid when the patient looks downwards.

[0009] The following description sets forth details of one or more embodiments of this disclosure. Other features, objects, and advantages will be apparent from the specification and claims. Attached Figure Description

[0010] The accompanying drawings, which are included in and form part of this specification, illustrate several aspects described below.

[0011] Figure 1A and Figure 1B This provides a front view of a bifocal contact lens designed according to the lens disclosed herein. Figure 1A ) and side view ( Figure 1B A schematic diagram of ). Figure 1A and Figure 1B A lens 101 is shown that includes a load-body lens-shaped bend, which is positioned on or near the upper edge of the contact lens 100.

[0012] Figures 1C and 1D are schematic diagrams showing a front view (Figure 1C) and a side view (Figure 1D) of an alternative bifocal contact lens according to the lens design disclosed herein. Figures 1C and 1D show a lens 101 including a load-body lenticular bend that is positioned further toward the center of the contact lens away from the upper edge of the contact lens 100.

[0013] Figure 2A (front view) and Figure 2B (side view) are schematic diagrams of the contact lens, showing the "push" and "pull" mechanisms associated with the upper lens section and the lower prism section.

[0014] Figures 3A to 3F are side views of exemplary contact lenses having lenses of various shapes in the upper part of the contact lens.

[0015] Figure 4A is a side view of an exemplary contact lens having an exemplary anatomical shape in the upper part of the contact lens.

[0016] Figure 4B is a front view of the lens of the anatomical shape of Figure 4A, showing the width (w) and height (h) dimensions.

[0017] Figure 4C is a front view of a contact lens with an anatomical shape in the upper part of the contact lens.

[0018] Figure 5A and Figure 5B It is a side view of the eye, showing a comparison between the eyelid attachment of a contact lens with a lens in the upper part of the lens and the eyelid attachment of a contact lens without a lens.

[0019] Figures 6A to 6J A front view of a contact lens with a non-limiting example of a lens as disclosed and described herein is shown. Detailed Implementation

[0020] This disclosure will now be described more fully below with reference to specific exemplary embodiments. In fact, this disclosure may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein.

[0021] This document discloses a contact lens that includes a lens in the upper portion (upper part) of the lens. For example, the lens may include a circle, a load body, or a lenticular bend above the central upper portion of the lens, but other lens shapes, designs, and positions are contemplated.

[0022] The various embodiments of contact lenses disclosed herein include upper lens designs that result in: (1) rotational stability of the contact lens in all gazes, (2) upward translation or movement of the contact lens when the eye is looking downwards, and (3) generally centered placement of the contact lens on the cornea and pupil as needed when the person's gaze changes. "Upward translation of the contact lens when the eye is looking downwards" means that the contact lens remains in an upward position when the patient looks down. The embodiments disclosed and described herein include one or more lenses located in the upper portion of the contact lens, wherein the lenses have any shape that allows any contact lens (soft, rigid, breathable, hybrid, etc.) to attach itself to the interior of the upper eyelid.

[0023] refer to Figure 1A and Figure 1B This shows a front view of a bifocal contact lens 100 designed according to the lens disclosed herein. Figure 1A ) and side view ( Figure 1B A schematic diagram of the lens. The lens is bifocal because it has a distance viewing area 103 and a near viewing area 104. Figure 1A and Figure 1B One characteristic of the contact lens shown is that lens 101 is positioned on the upper central portion of the contact lens. As described herein, the upper portion of contact lens 100 is referred to as the upper portion and the lower portion of contact lens 100 is referred to as the lower portion. Typically, lens 101 is positioned entirely in the upper portion of contact lens 100 above a horizontal centerline passing through the center of contact lens 100; however, the ends of one or more lenses may extend into the lower portion of contact lens below the horizontal centerline. Figure 1A and Figure 1B In the illustrated embodiment, lens 101 includes a circular load-body lens-shaped bend that extends in an arc around a portion of the upper edge of the contact lens 100, but other shapes, sizes, and designs of lens 101 are contemplated within the scope of embodiments of the invention and are disclosed herein. Figure 1A and Figure 1B Another feature of the design shown is the possible use of a prism 102 or ballast in the lower portion of the contact lens 100. The combined features of the contact lens 100 disclosed herein provide rotational stabilization, translation, and / or centering. The contact lens disclosed herein can be a rigid, breathable, or soft contact lens design, or a hybrid design, such that the contact lens has a rigid center with a soft surrounding. The lens can be made of a material capable of sensing light activity or molecules in the eye's environment and containing elements that modulate light or the surrounding eye environment, i.e., a liquid crystal display, a filter, a photochromic material, a compartment containing other materials, or a sensor. Although in Figure 1A and Figure 1B The contact lens 100 described herein is shown as a bifocal lens, but it should be understood that the contact lens 100 described herein may have any visual acuity, including monocular, bifocal, multifocal and / or toric.

[0024] exist Figure 1A , Figure 1B In Figures 1C and 1D, lens 101 can be seen at the top of contact lens 100. Lens 101 (in this example, a bent lens of the load body) can be positioned at the upper edge of contact lens 100, such as... Figure 1B As shown in Figure 1D, the lens 101 can be positioned at a distance from the edge of the contact lens 100. For example, the lens 101 can be positioned in the upper center portion of the contact lens 100. The lens 101 can be positioned at a distance of 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, or 5.0 mm, or more, less, or any amount between these distances from the outer edge of the contact lens 100. The prism 102 or ballast can be positioned in the lower half of the contact lens 100. The use of prisms is discussed in more detail herein.

[0025] Current state-of-the-art translational contact lenses are rigid, gas-permeable lenses. No successful soft contact lenses have yet achieved translational vision. All existing translational soft contact lenses move in the opposite direction of the design, meaning all other designs attempt to make the upper portion of the contact lens as thin as possible, rather than making it thicker and attaching it to the upper eyelid. The contact lenses disclosed herein provide translational contact lenses that include a soft contact lens, which is more comfortable and requires less adaptation time compared to rigid, gas-permeable lenses. Generally, patients are more willing and able to wear soft contact lenses compared to rigid, gas-permeable lenses, and soft contact lenses require less expert advice for adaptation. Current state-of-the-art bifocal or multifocal soft contact lenses provide simultaneous vision. In these lenses, light focused for distance vision and light focused for near vision are simultaneously within the pupil. Therefore, patients must be able to ignore unfocused light. This leads to decreased vision. The translational soft contact lenses disclosed herein allow light from only one distance to be focused at a time, thus providing clearer vision at each distance.

[0026] Soft contact lenses used to accommodate presbyopia patients at the current level of technology are referred to as monocular vision. In this case, one eye is provided with power for distance vision (usually the dominant eye) and the other eye is provided with power for near vision (usually the non-dominant eye). Some patients also find this type of lens unsuitable, especially when they require greater additional reading power. The difference between the two eyes becomes too uncomfortable. Furthermore, it has been established that monocular vision correction in contact lenses or laser vision correction results in a loss of depth perception. The translational soft contact lenses disclosed herein allow for the use of higher additional reading power without compromising the quality of distance vision. Because both eyes are fully and equally corrected at both distance and near distances in the disclosed design, no loss of depth perception is caused. The translational soft contact lenses disclosed herein may also have optical segments that provide a gradient of power variation between the distance and near distance segments.

[0027] The contact lenses disclosed herein are designed to suit a variety of practical purposes. For example, among rigid and soft contact lenses, the lens designs disclosed herein provide rotational stability in all gazes for toric contact lens designs, are designed to correct various types of ocular aberrations beyond spherical correction for electronically generated and / or virtual optical display images, and / or are bifocal or multifocal contact lenses. Additionally, the lens designs disclosed herein produce upward translation of bifocal / multifocal contact lenses during downward gaze. Furthermore, the lens designs disclosed herein achieve an "eyelid attachment" fit similar to rigid, gas-permeable contact lenses, i.e., maintaining the contact lens attached to the underside of the upper eyelid before, during, and after blinking.

[0028] In one embodiment, the upper portion of the contact lens interacts with the wearer's upper eyelid. The upper portion of the contact lens that interacts with the upper eyelid may include 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, or 75% of the area between the upper edge of the contact lens and its geometric center. For example, the area of ​​the upper portion of the contact lens (meaning the "upper half" of the contact lens, or the area between the upper edge of the contact lens and its geometric center) that interacts with the upper eyelid may include 10% to 50% of the upper region of the lens.

[0029] Typically, load-body lenses are used in rigid, breathable contact lenses to form an eyelid attachment adapted to a conical contact lens. In the contact lens design disclosed herein, lens 101 is placed only in the upper central portion of the lens, rather than on a larger portion of the lens circumference. Some embodiments of the lens design disclosed herein have a smaller area with a relatively thick edge to interact with the upper eyelid edge, and the minimal presence of the lens improves comfort compared to more conventional load-body lenses that are typically placed across the entire lens circumference. However, the contact lenses disclosed herein have sufficient surface area and lens thickness to interact with the upper tarsal plate to assist in centering and rotational stability.

[0030] As shown in Figures 2A and 2B, and referred to herein as the “push” and “pull” mechanisms, in addition to the interaction between the upper eyelid and the lens, the upper eyelid, according to the lens design disclosed herein, can also interact with an optional prism in the lower portion of the contact lens. With each blink, the edge of the upper eyelid presses down on the thicker base of the contact prism. The prism base also interacts with the lower eyelid with each blink; thus, the prism base is positioned above the edge of the lower contact lens at a height sufficient to remain above the lower eyelid when the eye is open. Just as multiple base curvature options can be used to accommodate different corneal curvatures, multiple heights of the prism base can optionally be used to account for differences in aperture size and eyelid position. Furthermore, multiple total diameters of the contact lens can also be used. In other words, the prism portion can provide a variation in power from the central optical zone of the contact lens. When the patient is looking forward and / or downward with their eyes open, and during blinking, the prism base may slide behind the lower eyelid by no more than 1, 1.5, 2, 2.5, or 3 millimeters (mm).

[0031] As disclosed above, the contact lens includes a relatively thicker region compared to the rest of the contact lens. This thicker region can be 1.5 times, 2 times, 3 times, 4 times, 5 times, 6 times, 7 times, 8 times, 9 times, or 10 times thicker than the remaining "non-thick" portion of the contact lens. For example, the relatively thicker region may include a thickest portion that is 2 to 10 times thicker than the remaining central portion of the contact lens.

[0032] In patients with or without presbyopia (i.e., reading added by panning upwards), patients with other accommodative disorders, and / or patients with binocular visual impairments, the contact lens embodiments disclosed herein can be used to correct refractive errors (myopia, hyperopia, astigmatism, and / or higher-order aberrations). Life expectancy is long enough (-45 years) that approximately 100% of the population with this condition is affected by presbyopia. The contact lens embodiments disclosed herein can also treat other accommodative disorders or binocular visual impairments. In some cases, the contact lens embodiments disclosed herein can be used to display electronically generated images and / or other virtual optical display images.

[0033] Conventional contact lenses offer very limited options in terms of design parameters such as diameter and curvature. The disclosed contact lens achieves translation in soft contact lenses. Soft contact lenses are typically manufactured with only two basal curvature options, and very few soft contact lenses are available in multiple diameter configurations. These multiple options in these two parameters are optionally considered in the lens design disclosed herein, in addition to the ability to change the prism height, size, number, or axis. The toric surface of the back or front surface utilizes a toric surface, rather than the spherical corneal shape that appears in some patients with astigmatism. The lens disclosed herein still functions when the cornea is spherical (not toric). The described lens also has advantages over basal-down prisms, peripheral ballast, and dynamic stability because, in addition to the interaction of the prisms of the lower eyelid (in lenses with a lower prism or ballast), it optionally uses the aforementioned lens appearance to stabilize the contact lens using the tarsal plate of the upper eyelid. The interaction with both eyelids can provide better stability.

[0034] Figures 3A to 3F are side views of exemplary contact lenses having lenses of various shapes in the upper portion of the contact lens. Each lens 301 has a shaped top surface 302. In Figure 3A, the lens 301 includes a circular load body bend 302 above the central upper portion of the lens. As described herein, the lens may be positioned at or near the edge of the contact lens 100, or further back from the edge of the lens 100. Furthermore, the lens 100 may comprise a single lens 301, or it may be multiple lenses having various shapes, sizes, and designs. Figures 3B through 3F illustrate non-limiting examples of the profiles of various other lenses, including a lens 301 with a flat top 302 (Figure 3B); a lens 301 with a flat top having a rounded edge 302 (i.e., a “protrusion”) (Figure 3C); a lens 301 with a concave top 302 (Figure 3D); a lens 301 with a convex top 302 (Figure 3E); and a lens 301 with a tapered top 302 shape, which is thicker towards the edge of the contact lens and gradually thins towards the center of the contact lens (Figure 3F). It should be understood that the lenses 301 shown in Figures 3A through 3F are intended to be non-limiting and are for illustrative purposes only. The lenses of the present invention are not confined to shape, size, number, position, or orientation (provided they are substantially within the upper portion of the contact lens).

[0035] Figure 4A is a side view of an exemplary contact lens having an exemplary anatomical shape in the upper part of the contact lens. In this embodiment, the shape of the lens is specifically designed to fit into the conjunctival sac and attach to the wearer's upper eyelid. For example, the lens of Figure 4A is designed to fit within the Kessing space of the wearer's upper eyelid (see "A New Division of the Conjunctiva on the Basis of X-Ray Examination" by Svend V, Kessing, Acta Ophthalmologica, Vol. 45, 1967). Figure 4B is a front view of the anatomically shaped lens 401 of Figure 4A, showing the width (w) and height (h) dimensions. In one of these embodiments, the shape and dimensions of the anatomically shaped lens 401 shown in Figures 4A and 4B are set according to the conjunctival insert disclosed and described in U.S. Patent 6,217,896, which is incorporated herein by reference in its entirety.

[0036] Despite variations in volume and linear size between individuals, the human inferior conjunctival sac shares certain general characteristics: a horizontal crescent shape; a thick lower horizontal ridge; and a wedge-shaped (longitudinally bifid) shape. To maximize the utilization of the actual volume and shape that may be contained within the human conjunctival sac, the anatomically shaped lens 401 can have a crescent shape in the horizontal plane, with the central posterior curvature conforming to the bulbar surface (posterior curvature radius approximately 14 mm, ranging from 12 mm to 18 mm). The majority of the device's volume is contained within the lower 50% of the shape, within the horizontal ridge located approximately two-thirds of the way from the top of lens 401 and approximately one-third of the way from the bottom. The maximum thickness of this crescent-shaped ridge in the horizontal plane is indicated in the table below (Table I). The anterior surface of lens 401 is more curved than the posterior surface to achieve the crescent shape. Lens 401 tapers gradually above the ridge to lie between the tarsal plate and the bulb, such that the anatomically shaped lens 401 thins to an acute angle at its upper edge. Therefore, in the longitudinal bisecting plane, lens 401 is wedge-shaped above the ridge, causing the pressure of the lower edge of the upper eyelid to induce a "load body" effect and help to house lens 401 within the lower sac. Starting from the middle of the thicker volume in the ridge, lens 401 gradually tapers to a blunt point relative to the nose and temporal region, allowing lens 401 to anchor more tightly within the tissue of the canthus. The horizontal length of lens 401 is the size covered in Table I, measured from left to right along the posterior surface of lens 401 behind the ridge. At the bottom, the lens is rounded from left to right (radius of curvature approximately 22 mm, ranging from 20-25 mm) and from front to back (radius of curvature approximately 0.75 mm, ranging from 0.5-1.0 mm in the middle), with the lowest part of lens 401 located at the horizontal midpoint.

[0037] Below, Table I provides exemplary sizes of lens 401 in three anatomical shapes (see Figures 4A and 4B).

[0038]

[0039] Table I

[0040] Starting from the thickest longitudinal bisecting plane at its horizontal midpoint, the shape of the right-side structure of the anatomically shaped lens 401 is the same as, but opposite to, the shape of the structure present on the left side. This allows the anatomically shaped lens 401 to be worn in the blind sac of either eye, where the left / right shape difference between the conjunctival sacs of the two eyes has been shown to be minimal. Another size shown in Table I, namely the vertical height (or thickness, T) of the insert (see Figure 4A), is greatest at the center of the insert and decreases to the left and right towards the blunt end. This is because the anatomically shaped lens 401 is slightly meniscus in the facial plane, more convex at its lower edge and relatively horizontal and flat at its upper edge. Figure 4C is a front view of the contact lens 100 with the anatomically shaped lens 401 in the upper part of the contact lens.

[0041] Additional non-limiting examples of anatomically shaped lenses include lenses having shapes including circular / oval, elliptical, triangular, heart-shaped, square, pentagonal, rhomboid, pear-shaped, rectangular, and combinations thereof, such that the shape of the lens is designed to fit into the conjunctival sac and attach to the wearer's upper eyelid.

[0042] Figure 5A and Figure 5B This is a side view of the eye, showing a comparison between the eyelid attachment of a contact lens 100 with a lens 501 in the upper part of the lens and the eyelid attachment of a contact lens without a lens. In various embodiments, the lens 501 may be anatomically shaped to attach to the upper eyelid by fitting within the conjunctival sac.

[0043] Figures 6A to 6J A front view of a contact lens as disclosed and described herein is shown, a non-limiting example of a contact lens having a lens in its upper portion. It should be understood that... Figures 6A to 6J The illustrated embodiment has a lenticular region comprising at least a portion of a lens, wherein the thickness of the lens is greater than the thickness of the lens at its central portion. Figure 6A In the middle, lens 601 has a semi-circular shape. Figure 6B In the middle, lens 601 has an arc shape. It should be understood that the arc length can be greater than... Figure 6B The length shown is either shorter or longer. Figure 6C and Figure 6D In this context, lens 601 is composed of multiple lens portions 602. For example, Figure 6C The lens 601 in the middle is composed of multiple hemispherical parts on the upper part of the contact lens, and Figure 6D The lens 601 is composed of multiple arc-shaped sections. It should be understood that... Figure 6C and Figure 6D The multi-part lens is exemplary, and other numbers of parts, shapes, and sizes of lenses can be contemplated within the scope of embodiments of the present invention. Figures 6E to 6J Non-limiting examples of other shapes, sizes, positions, and orientations of the lens 601 contemplated within the scope of embodiments of the invention are shown. Each embodiment shown herein may or may not have a prism and / or ballast in the lower portion of the contact lens 100.

[0044] This document also discloses methods for manufacturing the contact lenses disclosed herein. For example, a method for manufacturing a contact lens is disclosed, the method comprising forming a lens in the upper portion of the lens. The contact lens may also include a base-down prism or ballast in the lower portion of the lens. In one example, the base-down prism or ballast is added to the lens in a second step of the manufacturing process.

[0045] A method for treating an individual requiring vision correction is also disclosed, comprising dispensing the contact lens disclosed herein to the individual, thereby treating the individual requiring vision correction. In one example, the individual has been diagnosed with a refractive error (e.g., astigmatism, myopia, hyperopia). In another example, the individual has been diagnosed with presbyopia, another accommodative disorder, and / or binocular vision impairment. For example, one or more surfaces of the embodiments of the contact lens described herein may be made tortuous (for treating astigmatism), and / or a flatter or steeper anterior surface may be formed in the embodiments of the contact lens described herein (to correct myopia or hyperopia), and / or a bifocal / trifocal / multifocal power variation may be formed at the bottom (lower part) of the lens to treat presbyopia. Other medical uses of the embodiments of the contact lens described herein include the treatment of keratoconus.

[0046] Furthermore, the disclosed contact lens implementation scheme can be used for cosmetic purposes, such as changing / enhancing eye color and / or eye appearance.

[0047] As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” include plural references, unless the context clearly indicates otherwise.

[0048] The scope of the compositions and methods in the appended claims is not limited to the specific compositions and methods described herein, which are intended to illustrate some aspects of the claims, and any functionally equivalent compositions and methods are intended to fall within the scope of the claims. Various modifications of the ingredients and methods, in addition to those shown and described herein, are also intended to fall within the scope of the appended claims. Furthermore, while only certain representative ingredients and method steps disclosed herein are specifically described, other combinations of ingredients and method steps, even if not specifically stated, are intended to fall within the scope of the appended claims. Thus, combinations of steps, elements, components, or ingredients may be explicitly or less explicitly mentioned herein, but other combinations of steps, elements, components, and ingredients, even if not explicitly stated, are included. The term “comprising” and its variations are used herein synonymously with the term “including” and its variations, and are open-ended and non-limiting terms. While the terms “comprising” and “including” have been used herein to describe various embodiments, the terms “consistently consisting of” and “comprises” can be used in place of “comprising” and “including” to provide more specific embodiments of the invention and are also disclosed. Except where illustrated in the examples or otherwise stated, all figures for the quantities of ingredients, reaction conditions, etc., used in the specification and claims should be at least, and not intended to be construed as an application of the doctrine of equivalence limiting the scope of the claims, but should be interpreted in accordance with the numerical values ​​of significant figures and ordinary rounding.

Claims

1. A contact lens, comprising: The upper part of the contact lens; The lower part of the contact lens; Lens part; as well as A lens, positioned only along the outer edge of the contact lens in the upper part of the contact lens, has a thickness greater than the thickness of any other part of the contact lens, such that the lens is shaped to attach the contact lens only to the wearer's upper eyelid through interaction with the upper tarsal plate of the wearer's upper eyelid. This attachment causes the contact lens to translate upwards during downward gaze, thereby providing central positioning of the different optical portions of the contact lens on the wearer's cornea and pupil as the wearer's gaze changes and providing rotational stability of the contact lens in all gazes. The lens has a top surface that has a shape selected from the group consisting of: a flat shape, a flat shape with rounded corners, a concave shape, a convex or conical shape with a portion that becomes thicker towards the edge of the contact lens, or a combination thereof, and / or The lens has a crescent shape in the horizontal plane, wherein the central back curvature conforms to the bulbous surface of the contact lens; a thick lower horizontal ridge is located approximately two-thirds of the way from the top of the lens and one-third of the way from the bottom of the lens, and the front surface of the lens is more curved than the rear surface of the lens to obtain the crescent shape, thereby the lens has a longitudinally bisected wedge shape, and / or The lens is composed of multiple lens parts.

2. The contact lens according to claim 1, wherein, The lens is a soft contact lens, a rigid gas-permeable contact lens, or a hybrid contact lens.

3. The contact lens according to claim 1 or 2, wherein, Each lens portion has a shape selected from the following group: arc, curved, circular, annular, hemispherical, square, rectangular, triangular, elliptical, polygonal, and combinations thereof.

4. The contact lens according to claim 1 or 2, wherein, Each lens portion has a top surface having a shape selected from the group consisting of: curved, circular, spherical, flat, flat with rounded corners, concave, convex or conical with a portion that becomes thicker closer to the edge of the contact lens, or a combination thereof.

5. The contact lens according to claim 1 or 2, wherein, The lens is anatomically designed to fit within the Kessing space of the wearer's upper eyelid.

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