Soft hydrophilic contact lenses

Abstract

The present invention provides a soft hydrophilic contact lens having a near object surface and a near eye surface, and including a central corrective zone, multiple annular corrective zones, and multiple annular defocus zones. The multiple annular defocus zones and the multiple annular corrective zones are alternately arranged outward from the central corrective zone. The near eye surface has a first defocusing structure protruding from each annular defocusing zone. The first defocusing structure is a tooth-shaped structure disposed along the annular defocusing zone, and the tooth-shaped structure has an inclined surface inclined outward from the central corrective zone. The near object surface has a second defocusing structure protruding from each annular defocusing zone, and the outer surface of the second defocusing structure is a convex curved surface. The technical solution of this application can improve the therapeutic effect of soft hydrophilic contact lenses.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lenses, in particular to a soft hydrophilic contact lens. Background Art

[0002] Myopia is a common refractive error in the human eye, typically described as an imbalance between the focusing power of the eye's optical system and its size / length. Myopia occurs when the focal point is located in front of the retina. Corrective glasses are typically regularly updated to allow for clear vision. This creates a defocused image in front of the retina, utilizing the emmetropization mechanism to induce an increase in corneal curvature and lens thickness, thereby correcting myopia. Existing soft hydrophilic contact lenses often utilize Fresnel lenses, but their defocused areas have low refractive power, resulting in a defocused image closer to the retina. This results in weak stimulation of the emmetropization mechanism and unsatisfactory treatment results. Summary of the Invention

[0003] The main purpose of the present invention is to provide a soft hydrophilic contact lens, aiming to improve the therapeutic effect of the soft hydrophilic contact lens.

[0004] To achieve the above objectives, the present invention provides a soft hydrophilic contact lens, comprising a near object surface and a near eye surface, and including a central corrective zone, a plurality of annular corrective zones, and a plurality of annular defocus zones. The plurality of annular defocus zones and the plurality of annular corrective zones are alternately arranged outward from the central corrective zone. The near eye surface is provided with a first defocusing structure protruding from each annular defocusing zone. The first defocusing structure is a tooth-shaped structure arranged around the annular defocusing zone, and the tooth-shaped structure has an inclined surface inclined outward from the central corrective zone.

[0005] The near-object surface is provided with a second defocusing structure convexly disposed along each of the annular defocusing regions, and the outer surface of the second defocusing structure is a convex arc surface.

[0006] In one embodiment of the soft hydrophilic contact lens of the present application, the second defocusing structure includes a plurality of hemispheres convexly disposed on the near object surface, and the plurality of hemispheres are sequentially arranged along the circumference of the annular defocusing area.

[0007] In one embodiment of the soft hydrophilic contact lens of the present application, the widths of the annular defocusing areas are uniform, and the diameters of the hemispheres in the plurality of second defocusing structures gradually increase, so that the number of hemispheres in the plurality of second defocusing structures gradually decreases from the inside to the outside.

[0008] In one embodiment of the soft hydrophilic contact lens of the present application, the distance L between the centers of two adjacent hemispheres and the diameter D of the hemispheres satisfy 1.5D≤L≤2D.

[0009] In one embodiment of the soft hydrophilic contact lens of the present application, the diameter D of the hemisphere satisfies: 0.05 mm ≤ D ≤ 1.5 mm.

[0010] In one embodiment of the soft hydrophilic contact lens of the present application, the refractive powers of the plurality of annular defocus zones gradually decrease from the central correction zone outwards.

[0011] In one embodiment of the soft hydrophilic contact lens of the present application, the angles between the inclined surfaces of the plurality of tooth-shaped structures and the near-eye surface gradually decrease from the inside to the outside;

[0012] And / or, the heights of the convex arc surfaces of the plurality of second defocusing structures gradually increase.

[0013] In one embodiment of the soft hydrophilic contact lens of the present application, the width of the annular correction zone meets 4 mm to 7 mm.

[0014] In one embodiment of the soft hydrophilic contact lens of the present application, the area of ​​the central correction zone is smaller than the pupil area of ​​the user.

[0015] The soft hydrophilic contact lens of the present invention forms a central correction zone, an annular correction zone and an annular defocus zone on the lens. The central correction zone and the annular correction zone are used to form an image on the user's retina for the user to see objects clearly. The annular defocus zone has a tooth-like structure formed on the near-eye surface of the lens, making the lens similar to a Fresnel lens, so that a defocused image can be formed in front of the user's retina through the annular defocus zone, inducing the user's eyeball to grow and correct myopia; at the same time, a second defocusing structure with a convex arc surface on the annular defocusing zone is convexly provided on the near-object surface of the lens. The second defocusing structure is similar to a convex lens, so that the convex lens cooperates with the toothed first defocusing structure on the Fresnel lens, so that the defocused image is located at a position closer to the user's retina, thereby improving the stimulation ability of the emmetropization mechanism, thereby better inducing the user's eyeball to grow, correcting myopia, and improving the therapeutic effect of the soft hydrophilic contact lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 Schematic diagram of the structure of an embodiment of a soft hydrophilic contact lens of the present invention;

[0018] Figure 2 for Figure 1Schematic diagram of the use of medium-soft hydrophilic contact lenses.

[0019] Description of Figure Numbers:

[0020]

[0021] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] The present invention provides a soft hydrophilic contact lens 100 .

[0027] Please refer to Figure 1 and Figure 2In some embodiments of the soft hydrophilic contact lens 100 of the present application, the soft hydrophilic contact lens 100 has a near object surface and a near eye surface, and includes a central correction zone 10, a plurality of annular correction zones 20, and a plurality of annular defocusing zones 30. The plurality of annular defocusing zones 30 and the plurality of annular correction zones 20 are alternately arranged outward from the central correction zone 10. The near eye surface is provided with a first defocusing structure 31 protruding from each annular defocusing zone 30. The first defocusing structure 31 is a tooth-shaped structure arranged around the annular defocusing zone 30. The tooth-shaped structure has an inclined surface inclined from the inside to the outside.

[0028] A second defocusing structure 32 is convexly provided on each of the annular defocusing regions 30 near the object surface and is arranged around the annular defocusing region 30 . The outer surface of the second defocusing structure 32 is a convex arc surface.

[0029] It is understandable that for myopic users, the focus of the optical structure of the eye is located in front of the retina of the eye, resulting in myopic defocus, which makes the user unable to see the picture clearly. When the myopic user wears glasses, the myopic glasses can change the focus so that the focus is at the user's retina, allowing the user to see the image clearly, but it will inhibit the growth of the eyes and make the user over-dependent on glasses. This is especially true for children, who should undergo vision correction as early as possible during their childhood. The soft hydrophilic contact lens 100 proposed in the present application can not only help a user see images clearly, but also induce the user's eye growth. Specifically, the soft hydrophilic contact lens 100 includes a central correction zone 10, which is roughly located in the middle area of ​​the soft hydrophilic contact lens 100. Therefore, when the user is looking at a distance, the pupil is roughly opposite the central correction zone 10. The refractive power of the central correction zone 10 corresponds to the degree of the user's myopic refractive error and is mostly negative, so as to project the image clearly onto the user's retina, allowing the user to see the image clearly when looking at a distance. The outer periphery of the central correction zone 10 is alternately provided with annular defocusing zones 30 and annular correction zones 20. The annular defocusing zones 30 can form an image in front of the user's retina. With this arrangement, since the defocused image is located in front of the user's retina, the growth of the user's eyeball is inhibited to prevent the user's myopia from worsening, or the user is induced to focus until the focus of the user's eyeball is aligned with the position of the user's retina, thereby correcting the user's vision.

[0030] Specifically, the soft hydrophilic contact lens 100 has a near-object surface and a near-eye surface that are relatively arranged. It can be understood that when the user wears the glasses, the surface close to the user is the near-eye surface, and the surface close to the object is the near-object surface. At this time, a first defocusing structure 31 is convexly provided on the near-eye surface at a position corresponding to the annular defocusing area 30. The first defocusing structure 31 is an annular tooth-shaped structure. The tooth-shaped structure has an inclined surface that tilts outward from the central correction area 10, so that the soft hydrophilic contact lens 100 can form a structure similar to a Fresnel lens. At this time, the target image can be focused on the user's retina through the central correction area 10 and multiple annular correction areas 20, allowing the user to see objects clearly; and the first defocusing structure 31 on the annular defocusing area 30 can form a defocused pattern in front of the user's retina, thereby inhibiting the growth of the eyeball, increasing the corneal curvature of the user's eyeball, and increasing the thickness of the lens, thereby preventing the user's myopia from worsening and achieving the purpose of correcting myopia. Furthermore, an annular second defocusing structure 32 is provided on the near object plane at a position corresponding to the annular defocusing region 30. The outer surface of the second defocusing structure 32 is a convex arc surface. This configuration is equivalent to placing a convex lens in front of a Fresnel lens. This increases the angle of refraction of light, causing the defocused image to be formed further in front of the user's retina. This increases the stimulation of the user's emmetropization mechanism, further increasing the curvature of the user's cornea and the thickness of the lens, thereby preventing the user's myopia from worsening, achieving rapid myopia correction, and enhancing the therapeutic effect of the soft hydrophilic contact lens 100. The second defocusing structure 32 can be a complete annular structure or, as in the following embodiment, a composite structure formed by multiple hemispheres 321, which is not limited here.

[0031] Therefore, it can be understood that the soft hydrophilic contact lens 100 of the present invention forms a central correction area, an annular correction area 20 and an annular defocusing area 30 on the lens. The central correction area and the annular correction area 20 are used to form an image on the user's retina for the user to see objects clearly. The annular defocusing area 30 is formed with a toothed structure on the near-eye surface of the lens, making the lens similar to a Fresnel lens, so that a defocused image can be formed in front of the user's retina through the annular defocusing area 30, inducing the user's eyeball to grow and correct myopia; at the same time, a second defocusing structure 32 with a convex arc surface on the annular defocusing area 30 on the near-object surface of the lens is convexly provided. The second defocusing structure 32 is similar to a convex lens, so that the convex lens cooperates with the toothed first defocusing structure 31 on the Fresnel lens, so that the defocused image is located at a position closer to the user's retina, thereby improving the stimulation ability of the emmetropization mechanism, thereby better inducing the user's eyeball to grow, correcting myopia, and improving the therapeutic effect of the soft hydrophilic contact lens 100.

[0032] Please refer to Figure 2In some embodiments of the soft hydrophilic contact lens 100 of the present application, the second defocusing structure 32 includes a plurality of hemispheres 321 protruding from the near object surface, and the plurality of hemispheres 321 are arranged in sequence along the circumference of the annular defocusing area 30.

[0033] In this embodiment, the second defocusing structure 32 includes a plurality of hemispheres 321 convexly arranged on the near object surface. At this time, the outer surface of each hemisphere 321 is a convex arc surface. With this arrangement, a plurality of tiny lenses can be formed in front of the Fresnel lens. The plurality of tiny lenses are distributed around the annular defocusing area 30 to form a diffuse magnified shape outside the correction area. After the positive optical power tiny lenses are superimposed on the surface of the Fresnel lens, these tiny lenses form independent image planes in front of the retina to form peripheral myopic defocus. The arrangement of the tiny lenses enables the soft hydrophilic contact lens 100 to be designed with a clear vision area based on the bionic principle of the human eye, and the peripheral myopic defocus area assists in delaying the deepening of refractive error. The asymmetric multi-point myopic defocus lens with this structure fully takes into account the characteristics of teenagers' glasses and will effectively reduce wearing discomfort.

[0034] Please refer to Figure 1 In some embodiments of the soft hydrophilic contact lens 100 of the present application, the widths of the annular defocusing areas 30 are consistent, and the diameters of the hemispheres 321 in the plurality of second defocusing structures 32 gradually increase, so that the number of hemispheres 321 in the plurality of second defocusing structures 32 gradually decreases from the inside to the outside.

[0035] In this embodiment, each second defocusing structure 32 includes at least one circle of hemispherical bodies 321, and each circle of hemispherical bodies 321 includes a plurality of hemispherical bodies 321 arranged along the circumferential direction. When the second defocusing structure 32 includes two or more circles of hemispherical bodies 321, at least two circles of hemispherical bodies 321 are sequentially fitted together. At the same time, the diameters of the hemispheres 321 in the multiple second defocusing structures 32 gradually increase. When the widths of the annular defocusing areas 30 are the same, the number of hemispheres 321 in the multiple second defocusing structures 32 decreases. This arrangement allows the light addition of the multiple defocusing areas to increase according to a certain gradient, thereby improving wearing comfort. In addition, the refractive powers of the multiple annular defocusing areas 30 are different, so that the multiple annular defocusing areas 30 can form an effective non-continuous myopic defocus in front of the retina, thereby making the defocused images generated by the multiple annular defocusing areas 30 in front of the retina multiple and non-uniform. Compared with the focused image formed on the retina, they are non-uniform and blurred. Therefore, the defocused images formed by the annular defocusing areas 30 will not become a significant source of visual interference.

[0036] In addition, when a normal object is projected onto the retina as a uniformly focused image and multiple non-uniformly defocused images are projected in front of the retina, the defocus range is formed along the axis and periphery of the retina, so that the entire focal plane extends over the entire retina, thereby maintaining an effective myopic defocus range in front of the retina, making it more effective to delay the progression of myopia in adolescents and correct myopia.

[0037] Please refer to Figure 1 In some embodiments of the soft hydrophilic contact lens 100 of the present application, the distance L between the centers of two adjacent hemispheres 321 and the diameter D of the hemispheres 321 satisfy 1.5D≤L≤2D.

[0038] In this embodiment, the distance between the centers of two adjacent hemispheres 321 and the diameter of each hemisphere 321 satisfies 1.5D≤L≤2D, where L can be 1.5D, 1.8D, 1.9D, 2D, or any value between 1.5D and 2D, and is not limited here. The distance between the centers of the hemispheres 321 is limited in this embodiment to maintain a certain gap between the multiple hemispheres 321 to avoid affecting the light entering the microlenses of each hemisphere 321, but the spacing is relatively small to avoid leaving a large amount of blank space in the annular defocusing area 30 on the near object surface, thereby avoiding the formation of multiple alternating areas with large differences in refractive power on the annular defocusing area 30 at the same diameter position, which may cause dizziness and visual fatigue when the user stares for a long time.

[0039] In some embodiments of the soft hydrophilic contact lens 100 of the present application, the diameter D of the hemisphere 321 satisfies: 0.05 mm ≤ D ≤ 1.5 mm.

[0040] In this embodiment, the diameter of the hemisphere 321 can be 0.05 mm, 0.1 mm, 1.5 mm, or any other value between 0.05 mm and 1.5 mm. This configuration ensures that the second defocusing structure 32 can effectively increase the diopter of the annular defocusing zone 30 by adding light, thereby positioning the defocused image projected by the annular defocusing zone 30 further away from the user's retina, thereby enhancing the stimulation of the emmetropization mechanism, thereby better inducing eye growth, correcting myopia, and improving the therapeutic effect of the soft hydrophilic contact lens 100. This also prevents the hemisphere 321 from protruding too high, thereby preventing light refracted by the hemisphere 321 from entering the central correction zone 10 or the annular correction zone 20, thereby affecting the image on the retina and affecting the user's vision.

[0041] In some embodiments of the soft hydrophilic contact lens 100 of the present application, the diopter of the plurality of annular defocus zones 30 gradually decreases from the central correction zone 10 outwards.

[0042] In this embodiment, the diopter of the multiple annular defocusing areas 30 gradually decreases from the inside to the outside along the radial direction of the central correction area 10, so that the defocused images produced by the multiple annular defocusing areas 30 in front of the retina are non-uniform and non-uniform compared to the focused image formed on the retina. Therefore, it will not become a significant source of visual interference.

[0043] In addition, a normal object is projected as a uniformly focused image on the retina and multiple non-uniformly defocused images in front of the retina. This creates a defocus range along the axis and periphery of the retina, so that the entire focal plane extends over the entire retina, maintaining a therapeutic myopic defocus range in front of the retina.

[0044] Please refer to Figure 2 In some embodiments of the soft hydrophilic contact lens 100 of the present application, the angles between the inclined surfaces of the plurality of tooth-shaped structures and the near-eye surface gradually decrease from the inside to the outside;

[0045] And / or, the heights of the convex surfaces of the plurality of second defocusing structures 32 gradually increase.

[0046] In the technical solution of the aforementioned embodiment, the diopter of the multiple annular defocusing zones 30 is gradually reduced from the inside to the outside along the radial direction of the central correction zone 10. In this embodiment, the diopter of the multiple annular defocusing zones 30 can be gradually reduced from the inside to the outside along the radial direction of the central correction zone 10 by gradually reducing the angle between the inclined surfaces of the multiple tooth-shaped structures and the near-eye surface. Alternatively, the height of the convex surface of the second defocusing structure 32 can be gradually increased to increase the thickness of the convex lens and reduce the focal length. Alternatively, the angle between the inclined surfaces of the tooth-shaped structures and the near-eye surface can be reduced while the height of the multiple tooth-shaped structures is increased. All of these methods can achieve the aforementioned purpose of reducing the diopter of the annular defocusing zone 30, and are not limited here.

[0047] In some embodiments of the soft hydrophilic contact lens 100 of the present application, the width of the annular correction zone 20 satisfies 4 mm to 7 mm.

[0048] In this embodiment, the width of the annular correction zone 20 can be 4 mm, 5 mm, 6 mm, 7 mm, or any value between 4 mm and 7 mm, so that the annular correction zone 20 can form a clearer image on the retina, thereby improving the clarity of the user's vision.

[0049] Please refer to Figure 2 In some embodiments of the soft hydrophilic contact lens 100 of the present application, the area of ​​the central correction zone 10 is smaller than the user's pupil area.

[0050] In this embodiment, the area of ​​the central correction zone 10 is smaller than the pupil size of a typical child or young adult. Therefore, at least one annular defocused zone 30 covers the pupil and introduces a defocused image onto the retina including the central axis area, ensuring that the soft hydrophilic contact lens 100 can better achieve its therapeutic correction effect.

[0051] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A soft hydrophilic contact lens (100), the soft hydrophilic contact lens (100) having a near object surface and a near eye surface, and comprising a central correction zone (10), a plurality of annular correction zones (20), and a plurality of annular defocus zones (30), wherein the plurality of annular defocus zones (30) and the plurality of annular correction zones (20) are alternately arranged in sequence from the central correction zone (10) outward, characterized in that: The near-eye surface is provided with a first defocusing structure (31) protruding from each of the annular defocusing areas (30), wherein the first defocusing structure (31) is a tooth-shaped structure arranged around the annular defocusing area (30), and the tooth-shaped structure has an inclined surface inclined outward from the central correction area (10); The near-object surface is provided with a second defocusing structure (32) convexly arranged along each of the annular defocusing areas (30), and the outer surface of the second defocusing structure (32) is a convex arc surface; The second defocusing structure (32) comprises a plurality of hemispherical bodies (321) convexly arranged on the near object surface, wherein the plurality of hemispherical bodies (321) are sequentially arranged along the circumference of the annular defocusing area (30); The widths of the annular defocusing areas (30) are consistent, and the diameters of the hemispheres (321) in the plurality of second defocusing structures (32) gradually increase, so that the number of hemispheres (321) in the plurality of second defocusing structures (32) gradually decreases from the inside to the outside.

2. The soft hydrophilic contact lens (100) according to claim 1, wherein The distance L between the centers of two adjacent hemispheres (321) and the diameter D of the hemispheres (321) satisfy 1.5D≤L≤2D.

3. The soft hydrophilic contact lens (100) according to claim 1, wherein: The diameter D of the hemisphere (321) satisfies 0.05 mm ≤ D ≤ 1.5 mm.

4. The soft hydrophilic contact lens (100) according to claim 1, wherein The diopter of the plurality of annular defocusing zones (30) gradually decreases from the central correction zone (10) outwards.

5. The soft hydrophilic contact lens (100) according to claim 4, characterized in that The angles between the inclined surfaces of the plurality of tooth-shaped structures and the near-eye surface gradually decrease from the inside to the outside; And / or, the heights of the convex arc surfaces of the plurality of second defocusing structures (32) gradually increase.

6. The soft hydrophilic contact lens (100) according to claim 1, wherein: The width of the annular correction zone (20) satisfies 4 mm to 7 mm.

7. The soft hydrophilic contact lens (100) according to any one of claims 1 to 6, characterized in that The area of ​​the central correction zone (10) is smaller than the pupil area of ​​the user.

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