Intraocular lenses

Abstract

The present invention provides an artificial lens, which relates to the technical field of medical devices. The artificial lens includes an optical part and at least two support loops. A convex rib is provided at the edge of the optical part, and the connecting end of the support loop is detachably fixedly connected to the convex rib, and the fixed end of the support loop is used to be fixed at the sclera. The artificial lens can be fixed at the sclera through the support loop when in use, and is suitable for artificial lens implantation in patients without capsule support. Different from the conventional one-piece artificial lens, the optical part of the artificial lens is separated from the support loop, and then reassembled and fixed during surgery, which can avoid the complicated operation of leading the support loop from the eye to the outside of the eye in the past, simplify the steps of artificial lens implantation and fixation during surgery, the surgical operation is simple and easy, and no sutures are required, which improves the fixation effect of the artificial lens, shortens the operation time, and reduces the risk of artificial lens implantation surgery.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an artificial lens. Background Art

[0002] An intraocular lens is a precision optical component that is surgically implanted into the eye to replace the removed cloudy lens. In ophthalmology clinics, it is common for patients to have dislocation or rupture of the lens capsule due to eye trauma or surgery. Fixing the intraocular lens for such patients is a major clinical problem. Currently, such patients are treated clinically by using intraocular lenses fixed in the capsule (capsule). Since the optical part of the existing intraocular lens is integrated with the support haptic (also referred to as haptic), there are mainly the following methods to treat such patients:

[0003] (1) Two-point, three-point or four-point suture suspension fixation

[0004] The existing intraocular lens loops used for intra-capsular fixation are fixed to the sclera with sutures. This method has the following problems: 1. The sutures will degrade and be absorbed; 2. The position of the intraocular lens will deviate; 3. The operation is complicated.

[0005] (ii) Scleral interlaminar fixation

[0006] The haptic of the existing three-piece intraocular lens (the intraocular lens with a harder haptic fixed in the capsular bag) is led out of the eye, and the end of the haptic is inserted into the scleral lamellar tunnel for fixation. This method has the following problems: 1. The haptic of the intraocular lens designed for intraocular bag fixation is not long enough, and when the haptic is led out of the eye after the intraocular lens is implanted, it is easy to cause the haptic to deform, break, or even separate from the intraocular lens; 2. The operation is complicated and the instruments frequently enter and exit the eye.

[0007] In summary, in the absence of capsular bag support, since the optical part and the support haptic of the existing artificial lens are made in one piece, it is not easy to fix during surgery, and the corresponding surgery is complicated, takes a long time, and has a high risk of surgery. Summary of the invention

[0008] In view of this, an object of the present invention is to provide an artificial lens to improve the fixation effect of the artificial lens, simplify the operation of artificial lens implantation, thereby shortening the operation time and reducing the risk of artificial lens implantation surgery.

[0009] In a first aspect, the present invention provides an intraocular lens, comprising an optical portion and at least two support haptics;

[0010] A convex rib is arranged at the edge of the optical part, the connecting end of the support haptic is detachably fixedly connected to the convex rib, and the fixed end of the support haptic is used to be fixed at the sclera.

[0011] In combination with the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the support haptic is snap-connected to the optical part.

[0012] In combination with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein a T-shaped flat hole is provided on the convex rib; the connecting end of the support loop includes a connecting head matching the T-shaped flat hole, and the support loop is fixed to the optical part through the connecting head.

[0013] In combination with the first possible implementation manner of the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein the support haptic is linear or C-shaped.

[0014] In combination with the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein the support haptic is threadedly connected to the optical part.

[0015] In combination with the fourth possible implementation of the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein a threaded hole is provided on the convex rib; and a first external thread matching the threaded hole is provided on the connecting end of the support loop.

[0016] In combination with the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein the support haptic is linear or C-shaped, and the fixed end of the support haptic is further provided with a second external thread.

[0017] In combination with the sixth possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the artificial lens also includes a nut threadedly connected to the fixed end of the support haptic; the nut cooperates with the second external thread.

[0018] In combination with the first aspect or any one of the first to seventh possible implementations thereof, the present invention provides an eighth possible implementation of the first aspect, wherein the material of the support haptic includes polymethyl methacrylate PMMA, polyvinylidene fluoride PVDF or acrylate.

[0019] In combination with the first aspect or any one of the first to seventh possible implementations thereof, the present invention provides a ninth possible implementation of the first aspect, wherein the length of the support haptic is 4-5 mm.

[0020] The present invention brings the following beneficial effects:

[0021] In the present invention, the intraocular lens comprises an optical part and at least two support haptics; a convex rib is arranged at the edge of the optical part, the connection end of the support haptic is detachably fixedly connected to the convex rib, and the fixed end of the support haptic is used to be fixed at the sclera. The intraocular lens can be fixed outside the sclera or between the sclera layers by the support haptic when in use, and is suitable for intraocular lens implantation in patients without capsule support; different from the conventional one-piece intraocular lens, the optical part of the intraocular lens is separated from the support haptic, and the split intraocular lens can directly insert the support haptic from the sclera outside the eye and connect and fix it with the convex rib of the optical part during surgery, thus fundamentally avoiding the deformation, breakage, and even separation of the support haptic from the intraocular lens when the support haptic is led out of the eye after the intraocular lens is implanted, simplifying the steps of intraocular lens implantation and fixation during surgery, and the surgical operation is simple and easy, and no suture is required, thereby improving the fixation effect of the intraocular lens, thereby shortening the operation time and reducing the risk of intraocular lens implantation surgery.

[0022] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the specific implementation methods. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1a A front view of an artificial lens provided by an embodiment of the present invention;

[0026] Figure 1b A left side view of an intraocular lens provided by an embodiment of the present invention;

[0027] Figure 1c A top view of an artificial lens provided by an embodiment of the present invention;

[0028] Figure 2 A cross-sectional view of a clip-on linear intraocular lens provided by an embodiment of the present invention at AA in FIG1 ;

[0029] Figure 3 for Figure 2 Partial cross-sectional view at the middle BB;

[0030] Figure 4a A partial stereoscopic diagram of a linear support haptic provided by an embodiment of the present invention;

[0031] Figure 4b A front view of a linear support haptic provided by an embodiment of the present invention;

[0032] Figure 4c A left side view of a linear support haptic provided in an embodiment of the present invention;

[0033] Figure 5 A cross-sectional view of a snap-on C-type intraocular lens provided by an embodiment of the present invention at AA in FIG1 ;

[0034] Figure 6 A schematic diagram of the structure of a C-shaped support haptic provided in an embodiment of the present invention;

[0035] Figure 7 A cross-sectional view of a threaded intraocular lens at AA in FIG. 1 provided by an embodiment of the present invention;

[0036] Figure 8 A schematic structural diagram of a threaded support loop provided by an embodiment of the present invention;

[0037] Fig. 9 A schematic structural diagram of discrete components of a snap-on linear intraocular lens provided by an embodiment of the present invention;

[0038] Fig.10 A schematic structural diagram of discrete components of a threaded intraocular lens provided by an embodiment of the present invention;

[0039] Fig.11 A diagram showing the usage status of an artificial lens provided in an embodiment of the present invention.

[0040] icon:

[0041] 100-optical part; 110-convex rib; 111-T-shaped flat hole; 112-threaded hole; 200-supporting loop; 211-connecting head; 212-first external thread; 221-second external thread; 300-nut; 401-cornea; 402-sclera; 403-pupil; 404-ciliary process. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] At present, in the absence of capsular bag support, the existing intraocular lens is not easy to fix, and the corresponding surgery is complicated and the surgical risk is high. Based on this, an intraocular lens provided in an embodiment of the present invention can improve the fixation effect of the intraocular lens, simplify the intraocular lens implantation operation, and reduce the risk of intraocular lens implantation surgery.

[0044] To facilitate understanding of the present invention, an artificial lens disclosed in an embodiment of the present invention is described in detail below.

[0045] Figure 1a A front view of an artificial lens provided by an embodiment of the present invention, Figure 1b This is a left side view of an artificial lens provided by an embodiment of the present invention. Figure 1c FIG. 1 is a top view of an artificial lens provided by an embodiment of the present invention. Figure 1a to Figure 1c As shown, the intraocular lens includes an optical part 100 and at least two support haptics 200; a convex rib 110 of a preset thickness is provided at the edge of the optical part 100, the connecting end of the support haptic 200 is detachably fixedly connected to the convex rib 110, and the fixed end of the support haptic 200 is used to be fixed at the sclera. During the operation, the connecting end of the support haptic 200 can be directly inserted into the eye from the designed part of the sclera outside the eye to connect with the convex rib 110 of the optical part 100, and the fixed end of the support haptic 200 is fixed outside the sclera or between the sclera layers.

[0046] Specifically, the thickness of the rib 110 is greater than the thickness of the adjacent portion of the optical portion 100. By setting the rib 110 with a preset thickness, the fixing effect between the optical portion 100 and the support haptic 200 can be improved. The preset thickness of the rib 110 can be, but is not limited to, 0.1 mm, and the thickness of the optical portion 100 at the position corresponding to the pupil of the human eye corresponds to the diopter of the human eye. In some possible embodiments, such as Figure 1a to Figure 1c As shown, the intraocular lens includes two support haptics 200 located at both ends of the optical part 100; the convex ribs 110 are distributed in a ring shape at the edge of the optical part 100. Of course, the convex ribs 110 can also be provided only at the connection with the support haptics 200, and the shape of the convex ribs 110 is not limited here. The shape of the support haptics 200 can be linear or curved. Figure 1a to Figure 1c A straight support loop 200 is used in both cases.

[0047] Specifically, the optical part 100 is foldable, and the material of the optical part 100 can be clear, soft and foldable acrylic, or silicone, hydrogel, etc. The refractive power of the optical part 100 can be -10.0 to +30.0D, and the increment can be 0.5D, such as +2.0D or +20.0D. The support haptic 200 should have a certain hardness. In some possible embodiments, the material of the support haptic 200 can be a plastic material such as polymethyl methacrylate PMMA (polymethyl methacrylate), polyvinylidene fluoride PVDF (polyvinylidene fluoride) or acrylate. The materials of the optical part 100 and the support haptic 200 are not limited here.

[0048] In some possible embodiments, the diameter of the optical part 100 is about 6.0 mm; for the annular convex rib 110, its outer diameter is about 6.0 mm, and its inner diameter is about 5.5 mm. The length of the support haptic 200 can be, but is not limited to, 4-5 mm. The intraocular lens can be implanted through a 3.2 mm incision, and the optical part 100 of the intraocular lens can be pre-placed in the folder, exposing at least one convex rib 110 of the intraocular lens, so that the support haptic 200 can be connected and fixed to the convex rib 110 after being inserted from outside the sclera.

[0049] Since the optical part 100 and the support haptic 200 are separately arranged, during the operation, the support haptic 200 can be directly inserted into the eye from the sclera outside the eye and connected and fixed with the convex rib 110 of the optical part 100. This fundamentally avoids the problems of deformation, breakage and even separation of the support haptic from the artificial lens when the support haptic is led out of the eye after the artificial lens is implanted. It also avoids the previous complicated operation of leading the support haptic from the eye to the outside of the eye, simplifies the surgical operation, and reduces the number of times the instrument enters and exits the eye. Moreover, since the artificial lens is specially designed for implantation of artificial lenses without capsular bag support, the length of its support haptic 200 is sufficient to extend to the sclera, and no sutures are required. Compared with sutures, the fixation effect is improved, the operation is simple, the fixation is reliable, the operation time is shortened, and the risk of artificial lens implantation surgery is reduced.

[0050] The embodiments of the present invention provide a variety of specific implementations of artificial lenses. Figures 2 to 10 Provide specific instructions.

[0051] 1. The support haptic 200 is snap-fitted to the optical part 100 .

[0052] Figure 2 A cross-sectional view of a clip-on linear intraocular lens at AA in FIG. 1 provided by an embodiment of the present invention, Figure 3 for Figure 2 Partial cross-sectional view at BB in the figure. Figure 2 and Figure 3As shown, a T-shaped flat hole 111 is formed on the rib 110; the support haptic 200 is linear, and the connecting end of the support haptic 200 includes a connector 211 that matches the T-shaped flat hole 111, and the support haptic 200 is fixed to the T-shaped flat hole 111 of the optical part 100 through the connector 211. Figure 2 As shown, the cross section of the T-shaped flat hole 111 along the AA direction is T-shaped.

[0053] Figure 4a A partial stereoscopic diagram of a linear support haptic provided by an embodiment of the present invention, Figure 4b A front view of a linear support loop provided by an embodiment of the present invention, Figure 4c The left side view of a linear support loop provided by an embodiment of the present invention. Specifically, the end of the connector 211 close to the T-shaped flat hole 111 is the guide portion, and the end of the connector 211 away from the T-shaped flat hole 111 is the clamping portion. Figures 4a to 4c As shown, the cross-sectional dimension of the guide portion is smaller than the cross-sectional dimension of the clamping portion, so that after the connector 211 is inserted into the T-shaped flat hole 111, the support loop 200 can be prevented from being pulled out of the T-shaped flat hole 111. The cross-sectional shape of the support loop 200 near the connector 211 can be a shape corresponding to the end face of the T-shaped flat hole 111, such as an ellipse. The use of the flat hole can prevent the support loop 200 from rotating, thereby improving the fixing effect.

[0054] Figure 5 A cross-sectional view of a snap-on C-type intraocular lens at AA in FIG. 1 provided by an embodiment of the present invention, Figure 6 A schematic diagram of the structure of a C-shaped support haptic provided by an embodiment of the present invention. Figure 5 and Figure 6 As shown, the snap-on C-type intraocular lens is Figure 2 The illustrated clip-on linear intraocular lens is similar, except that its support haptic 200 is C-shaped. The C-shaped support haptic 200 can be directly embedded between the sclera layers, that is, the fixed end of the C-shaped support haptic 200 can be directly inserted into the sclera tunnel for fixation, so the fixation operation of the intraocular lens and the human eye during surgery is relatively simple and convenient.

[0055] Of course, there are other clamping methods, which are not limited here. For example, a blind hole can be provided on the rib 110, and two convex strips are provided in the blind hole to limit the withdrawal of the connector 211 through the two convex strips.

[0056] 2. The support haptic 200 is threadedly connected to the optical part 100.

[0057] Figure 7 A cross-sectional view of a threaded intraocular lens at AA in FIG. 1 provided by an embodiment of the present invention, Figure 8A schematic diagram of the structure of a threaded support haptic provided by an embodiment of the present invention. Figure 7 and Figure 8 As shown, the rib 110 is provided with a threaded hole 112; the support haptic 200 is linear, and the connecting end of the support haptic 200 is provided with a first external thread 212 that matches the threaded hole 112. The threaded hole 112 and the first external thread 212 realize the fixed connection between the support haptic 200 and the optical part 100.

[0058] For the above two linear support haptics 200 (with connector 211 or first external thread 212), their linear structure makes it easier to introduce the support haptics 200 into the human eye during surgery. For the two linear support haptics 200, when the intraocular lens and the human eye are fixed during surgery, the excess part of the support haptics 200 can be cut off, and then the support haptics 200 can be fixed between the sclera layers by hot melting and the incision formed when the support haptics 200 are inserted is blocked.

[0059] Regarding the two linear support loops 200, considering that the hot melt method is relatively risky to operate, Figure 1a , Figure 1b , Figure 2 , Figure 3 , Figure 4b , Figure 4c , Figure 7 and Figure 8 As shown, the fixed end of the support haptic 200 is also provided with a second external thread 221, and the second external thread 221 is used to connect a fixing component with an internal thread matching the second external thread 221, such as a nut for fixing and sealing the incision, so that the support haptic 200 is fixed between the scleral layers and the incision is sealed by a threaded connection. In addition, the fixed end of the C-shaped support haptic 200 can also be provided with an external thread.

[0060] Fig. 9 A schematic diagram of the structure of discrete components of a snap-on linear intraocular lens provided by an embodiment of the present invention, Fig.10 The following is a schematic diagram of the structure of the discrete components of a threaded intraocular lens provided by an embodiment of the present invention. Fig. 9 and Fig.10 As shown, in Figure 2 and Figure 7 On the basis of, the artificial lens also includes a nut 300 threadedly connected to the fixed end of the support haptic 200; the nut 300 cooperates with the second external thread 221.

[0061] Specifically, the inner diameter of the nut 300 matches the fixed end of the support loop 200, for example, the inner diameter of the nut 300 is 1 mm. The length of the inner thread of the nut 300 can be 3 to 4 threads. The size of the nut 300 is not limited here.

[0062] Fig.11 A diagram showing the use status of an artificial lens provided by an embodiment of the present invention, Fig.11 The Fig. 9 The intraocular lens shown. Fig.11 As shown, the human eye includes a cornea 401, a sclera 402, a pupil 403 and a ciliary process 404, and the intraocular lens is fixed between the layers of the sclera 402 at the rear of the pupil by two support haptics 200 and corresponding nuts 300.

[0063] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0064] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0065] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0067] In the several embodiments provided in this application, it should be understood that the disclosed intraocular lens can be implemented in other ways. The intraocular lens embodiments described above are merely illustrative.

[0068] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An artificial lens, characterized in that: The intraocular lens is for implantation in an eye without capsular bag support, comprising an optical portion and at least two support haptics; A convex rib is provided at the edge of the optical part, the connecting end of the support haptic is detachably fixedly connected to the convex rib, and the fixed end of the support haptic is used to be fixed at the sclera; The convex ribs are distributed in an annular shape at the edge of the optical part, and the thickness of the annular convex ribs is greater than the thickness of the adjacent parts on the optical part.

2. The intraocular lens according to claim 1, characterized in that: The support haptic is snap-connected with the optical part.

3. The intraocular lens according to claim 2, characterized in that: A T-shaped flat hole is provided on the convex rib; the connecting end of the support haptic includes a connector matched with the T-shaped flat hole, and the support haptic is fixed on the optical part through the connector.

4. The intraocular lens according to claim 2, characterized in that: The support loop is linear or C-shaped.

5. The intraocular lens according to claim 1, characterized in that: The support haptic is threadedly connected to the optical part.

6. The intraocular lens according to claim 5, characterized in that: A threaded hole is provided on the convex rib; and a first external thread matching with the threaded hole is provided on the connecting end of the support loop.

7. The intraocular lens according to claim 1, characterized in that: The support loop is linear or C-shaped, and the fixed end of the support loop is also provided with a second external thread.

8. The intraocular lens according to claim 7, characterized in that: The artificial lens also includes a nut threadedly connected to the fixed end of the support haptic; the nut matches the second external thread.

9. The intraocular lens according to any one of claims 1 to 8, characterized in that: The material of the support haptic includes polymethyl methacrylate (PMMA), polyvinylidene fluoride (PVDF) or acrylate.

10. The intraocular lens according to any one of claims 1 to 8, characterized in that: The length of the support haptic is 4-5 mm.

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