Corneal lens extraction hook for myopia full femtosecond laser surgery

Abstract

A corneal lens removing hook used for myopia full femtosecond laser surgery comprises a handle and a separating hook, the separating hook is fixedly connected with the handle, the section of the separating hook is round or oval, and the diameter of the separating hook is gradually reduced from the handle to the tail end. The separating hook is in the shape of a straight section fixedly connected with the handle and an arc section integrated with the straight section, and the arc section is fixedly connected with the separating hook.

Description

Technical Field

[0001] The invention relates to a corneal interlayer tissue removal hook, in particular to a corneal lens removal hook used in myopia all-femtosecond laser surgery, and is mainly applied to the corneal lens removal technology used in all-femtosecond laser surgery for myopia treatment. Background Art

[0002] Myopia is listed as one of the three major diseases in the world. The number of myopic people in China has reached nearly 400 million, of which about 270 million are teenagers. The cornea is one of the main components of the eye's refractive system, accounting for 70% of the eye's refractive power. Currently, the main treatment for myopia is corneal laser surgery, including excimer laser surgery and femtosecond laser surgery. Femtosecond laser surgery is further divided into semi-femtosecond laser surgery and full-femtosecond laser surgery.

[0003] 1. Excimer laser surgery is based on the principle of using an excimer laser beam accurately controlled by a computer to vaporize tissue through the energy of laser photons, thereby changing the corneal curvature, reshaping the corneal curvature, and flattening the central front surface of the cornea of ​​the eye (flattening the corneal curvature), allowing light to focus on the retina, and allowing external light to accurately converge into an image in the fundus, thereby achieving the effect of treating myopia, hyperopia and astigmatism.

[0004] 2. Semi-femtosecond laser surgery refers to first using femtosecond laser to form a corneal flap, then lifting the corneal flap and using excimer laser to cut and ablate the corneal stromal bed, changing the curvature of the cornea, and then resetting the corneal flap to achieve the purpose of correcting refractive errors. Figure 1 , 2 shown.

[0005] 3. All-femtosecond laser surgery combines the advantages of excimer laser surgery and half-femtosecond laser surgery. It uses a femtosecond laser to make a 2mm incision at the edge of the cornea, and then scans the corneal stroma at two different depths and around the periphery with a femtosecond laser to make a pre-designed stroma lens, which is then removed through a small incision to achieve the purpose of correcting refractive errors.

[0006] The femtosecond laser performs laser blasting twice on the periphery and at different depths of the corneal stroma to form a stroma lens, and then separates the upper and lower layers of the lens through a 2 mm micro-incision and removes it. The laser does not separate the upper and lower layers of the lens in the corneal stroma, and they are still in an adhered state. A corneal separator needs to be inserted between the upper and lower layers of the lens to completely separate them before they can be removed with lens forceps. The disadvantage is that it is not easy to distinguish between the upper and lower layers of the lens, and when the lens forceps pull the lens, it is easy to tear the lens and leave it in the corneal interlayer, causing serious postoperative complications. The removal process is as follows: Figure 1 , 3 , as shown in Figure 4. Summary of the invention

[0007] A corneal lens removal hook used in myopia all-femtosecond laser surgery comprises a handle and a separation hook. The separation hook is fixedly connected to the handle, has a circular or elliptical cross-section, and a diameter that gradually decreases from the handle to the end. The separation hook is in the shape of a straight section fixedly connected to the handle and an arc section integrated with the straight section, and the arc section is fixedly connected to the separation hook.

[0008] The separation hook is fixedly connected to the inner side of the arc segment.

[0009] The separation hook comprises a separation hook column and a separation hook top, one end of the separation hook column is connected to the separation hook, and the other end is connected to the separation hook top.

[0010] The cross section of the separation hook column increases from one end connected to the separation hook to the other end connected to the top of the separation hook.

[0011] The cross section of the separation hook column is circular or approximately circular, with a diameter of about 0.15 mm at the small end and a diameter of about 0.2 mm at the large end.

[0012] The separation hook top is in the shape of an ellipsoid, a mushroom, or a shape similar to an ellipsoid or a mushroom. The lengthwise dimension of the separation hook top is about 0.3 mm, and the short dimension is about 0.15 mm.

[0013] The distance between the top of the separation hook and the adjacent surface of the separation hook is about 0.1 mm, and the distance between the center and the end of the separation hook is about 0.35 mm.

[0014] A guide rod is formed between the end of the separation hook and the separation hook. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a comparison chart of the incision sizes between half-femtosecond and full-femtosecond.

[0016] Figure 2 This is a simulation diagram of corneal removal during semi-femtosecond surgery.

[0017] Figure 3 , 4 This is a simulation diagram of corneal removal during all-femtosecond surgery.

[0018] Figure 5 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 6 Enlarged diagram of the separation hook Figure 1 .

[0020] Figure 7 Enlarged diagram of the separation hook Figure 2 .

[0021] Figure 8-9 This is a diagram of the experimental process of the separation lens of the present invention.

[0022] Figure 10-15 This is a diagram of the experimental process of removing the lens according to the present invention.

[0023] In the figure: 1-eyeball, 2-incision, 3-upper cornea, 4-middle layer, 5-forceps, 6-separation hook, 61-straight line segment, 62-arc segment, 63-separation hook, 631-separation hook top, 632-separation hook column, 633-guide segment, 7-handle, DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0028] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; 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 an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] like Figure 5-7 As shown, a cornea removal hook used in all-femtosecond myopia treatment surgery includes a handle and a separation hook. The separation hook is fixedly connected to the handle, and its cross-section is circular or elliptical, and its diameter gradually decreases from the handle to the end; the separation hook is in the shape of a straight section fixedly connected to the handle and an arc section integrated with the straight section, and the arc section is fixedly connected to the separation hook.

[0031] The separation hook is fixed to the inner side of the arc segment, and its function is to separate the adhesion around the cornea lens and remove it. Its advantage is that it can not only separate the adhesion around the lens and hook it out, but also because the force of hooking out is from far to near, the lens will not be broken and remain, thus avoiding the occurrence of serious complications of myopia surgery. The separation hook is hemispherical mushroom-shaped and will not hurt normal corneal tissue.

[0032] The separation hook comprises a separation hook column and a separation hook top, one end of the separation hook column is connected to the separation hook, and the other end is connected to the separation hook top.

[0033] The cross section of the separation hook column increases from one end connected to the separation hook to the other end connected to the top of the separation hook.

[0034] The cross section of the separation hook column is circular or approximately circular, with a diameter of about 0.15 mm at the small end and a diameter of about 0.2 mm at the large end.

[0035] The separation hook top is in the shape of an ellipsoid, a mushroom, or a shape similar to an ellipsoid or a mushroom. The lengthwise dimension of the separation hook top is about 0.3 mm, and the short dimension is about 0.15 mm.

[0036] The distance between the top of the separation hook and the adjacent surface of the separation hook is about 0.1 mm, and the distance between the center and the end of the separation hook is about 0.35 mm.

[0037] The setting of the above distance can ensure that the separation hook can completely separate the middle layer from the upper layer and the lower layer, and can ensure that the separation hook can hook the middle layer.

[0038] A guide rod is formed between the end of the separation hook and the separation hook. Its main function is to distinguish whether the instrument enters the upper layer or the lower layer of the lens; and can guide the separation hook to accurately enter between the middle layer and the upper layer and the lower layer.

[0039] After the laser cutting of the all-femtosecond surgery is completed, the middle layer is separated from the upper and lower layers with a separation hook. Figure 8-9 As shown in the figure, this is the same method used in traditional all-femtosecond laser scanning. Next, the separation hook is inserted into the incision between the middle layer and the upper layer, and continues to move away from the incision until it is farthest from the incision. Figure 10-15 As shown, at this time, hook the middle layer with the separation hook and push the middle layer toward the incision. Repeat this action from different directions in the middle, and at the same time, use tweezers to pull from the incision. Through the combination of pushing and pulling, the force on the middle layer is reduced, avoiding the problem of the middle layer being only subjected to tension and remaining.

[0040] The invention has been tested in dozens of pig eye surgeries and is practicable with a success rate of 100%.

[0041] The "corneal lens hook" provided by the present invention includes a separation rod consistent with the curvature of the cornea, a blunt positioning rod at the front end, and a mushroom-shaped hook with a separation function. The mushroom-shaped separation ball has the dual functions of separating the lens and hooking out the lens. After the femtosecond laser completes the upper and lower layers, side cutting, and incision scanning, it enters the edge of the separated lens from the upper layer of the corneal lens, and the mushroom-shaped hook head can smoothly hook down, the edge of the lens falls into the hook head, and the lens is hooked out in the direction of the incision. If the edge of the separated lens is entered from the lower layer of the lens, the lens hook hooks upwards and hooks out the lens in the direction of the incision, avoiding the previous technology that must first find the upper and lower layers and separate them before taking them out. The mushroom-shaped lens hook only needs to complete the operation between one layer, and whether it enters the upper or lower layer, the lens removal can be completed in one step, making the operation faster and easier to master.

[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A corneal lens removal hook used in myopia all-femtosecond laser surgery, characterized by: It includes a handle and a separation hook. The separation hook is fixedly connected to the handle, has a circular or elliptical cross-section, and its diameter gradually decreases from the handle to the end; the separation hook is in the shape of a straight section fixedly connected to the handle and an arc section integrated with the straight section, and the arc section is fixedly connected to the separation hook.

2. The corneal lens removal hook used in myopia all-femtosecond laser surgery according to claim 1, characterized in that: The separation hook is fixedly connected to the inner side of the arc segment.

3. The corneal lens removal hook used in myopia all-femtosecond laser surgery according to claim 1, characterized in that: The separation hook comprises a separation hook column and a separation hook top, one end of the separation hook column is connected to the separation hook, and the other end is connected to the separation hook top.

4. The corneal lens removal hook used in myopia all-femtosecond laser surgery according to claim 3, characterized in that: The cross section of the separation hook column increases from one end connected to the separation hook to the other end connected to the top of the separation hook.

5. The corneal lens removal hook used in myopia all-femtosecond laser surgery according to claim 3, characterized in that: The cross section of the separation hook column is circular or approximately circular, with a diameter of about 0.15 mm at the small end and a diameter of about 0.2 mm at the large end.

6. The corneal lens removal hook used in myopia all-femtosecond laser surgery according to claim 3, characterized in that: The separation hook top is in the shape of an ellipsoid, a mushroom, or a shape similar to an ellipsoid or a mushroom. The lengthwise dimension of the separation hook top is about 0.3 mm, and the short dimension is about 0.15 mm.

7. The corneal lens removal hook used in myopia all-femtosecond laser surgery according to claim 3, characterized in that: The distance between the top of the separation hook and the adjacent surface of the separation hook is about 0.1 mm, and the distance between the center and the end of the separation hook is about 0.35 mm.

8. The corneal lens removal hook used in myopia all-femtosecond laser surgery according to claim 1, characterized in that: A guide rod is formed between the end of the separation hook and the separation hook.

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