A corneal lenticule implantation apparatus and a corneal lenticule implantation system

Abstract

The application discloses a corneal interlayer lens implantation device and a corneal interlayer lens implantation system. The application mainly solves the problem that the current corneal interlayer lens is easily curled due to external force during implantation. The application is characterized in that: the device further comprises an inner push rod arranged in an outer sleeve, the inner push rod and the outer sleeve change relative positions; an unfolding push structure is arranged at a first end of the inner push rod; the unfolding push structure is in a contraction state when being retracted in the outer sleeve, and the unfolding push structure is in an unfolding state when being extended out of the outer sleeve, the length of the unfolding push structure extended out of the outer sleeve is different from the unfolding width of the unfolding push structure; the unfolding push structure comprises two unfolding rods at two sides, the unfolding rods in the unfolding state exert an unfolding effect on the lens, and the friction between the unfolding rods and the lens exerts a pushing effect. The application provides a corneal interlayer lens implantation device and a corneal interlayer lens implantation system, the device can unfold while pushing when implanting the corneal interlayer lens, and the device has a small incision and is not easy to be curled.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to a corneal interlaminar lens implantation device and a corneal interlaminar lens implantation system. Background Technology

[0002] With the development of ophthalmic refractive correction technology, interlaminar corneal implantation has become an effective means of correcting refractive errors such as presbyopia and hyperopia.

[0003] With advancements in materials science and minimally invasive surgical techniques, lens design is increasingly optimized towards ultra-thinness and high flexibility to reduce interference with corneal biomechanics and improve patient comfort. However, while significantly reducing lens thickness improves tissue compatibility, it also significantly increases the difficulty of controlling its mechanical stability.

[0004] Ultra-thin lenses are prone to unexpected curling during implantation due to external forces, leading to two key issues: First, real-time adjustment during surgery is difficult, as the coefficient of friction between the curled lens and the interlayer tissue increases, requiring repeated operations for precise repositioning, which not only prolongs the operation time but also increases the risk of corneal stromal trauma. Second, long-term postoperative stability is compromised, as lens curling during surgery may lead to increased eccentric displacement, resulting in elevated postoperative higher-order aberrations and directly affecting visual quality. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a corneal interlaminar lens implantation device and a corneal interlaminar lens implantation system, which mainly solves the problem that corneal interlaminar lenses are prone to unexpected curling due to external force during the implantation process.

[0006] The technical solution of the present invention is as follows:

[0007] An interlaminar lens implantation device includes an outer sheath and further includes...

[0008] The inner push rod is located inside the outer tube, and the relative position of the inner push rod and the outer tube changes.

[0009] The extension and push structure is located at the first end of the inner push rod. When the extension and push structure retracts into the outer tube, it is in a retracted state. When the extension and push structure extends into the outer tube, it is in an extended state. The extension width of the extension and push structure varies depending on the length of its extension from the outer tube. The extension and push structure includes extension rods on both sides. In the extended state, the extension rods play an role in extending the lens, and the friction between the extension rods and the lens plays a pushing role.

[0010] Alternatively, the unfolding structure may also include a central rod with a fork at one end, where the lens is positioned in the middle of the fork. The other part of the central rod provides a pushing function, and the unfolding rod in the unfolded state only serves to unfold the lens.

[0011] When the propulsion is achieved through friction, the extension and pushing structure also includes an intermediate rod. In the extended state, the end of the intermediate rod is lower than the end of the extension rod.

[0012] An operating handle is provided at the rear end of the outer tube. A pushing structure connected to the inner push rod is provided on the operating handle. The operating handle is provided with a contracted position of the inner push rod's pushing structure in the contracted state and an extended position of the inner push rod's pushing structure in the fully extended state. When the pushing structure is in the contracted position, the pushing structure is in the contracted state, and when the pushing structure is in the extended position, the pushing structure is in the fully extended state.

[0013] A small ball structure is set at the end of the unfolding rod. When the static friction force is the driving force, a small ball structure is also set at the end of the middle rod.

[0014] The sphere has a rough sphere structure.

[0015] The top of the intermediate rod has a forked structure.

[0016] An interlaminar lens implantation system includes:

[0017] The positioning unit performs visual axis positioning on the target object and determines the visual axis center of the target object;

[0018] The cutting unit is used to create a corneal implantation cavity for the target object based on the data determined by the positioning unit.

[0019] An implantation unit, comprising a corneal interlaminar lens implantation device as described above, for implanting a lens into the corneal implantation cavity of the target object, thereby aligning the lens with the visual axis center of the target object.

[0020] The positioning unit is an excimer laser device, and determining the visual axis center based on the built-in positioning system and / or corneal topography includes:

[0021] Set the cutting diameter and depth of cut using PTK mode;

[0022] Import pupil offset from corneal topography map;

[0023] Determine the center of the visual axis.

[0024] The cutting unit creates the corneal implant cavity for the target object, including:

[0025] Based on the cutting diameter and cutting depth, cutting is performed between the corneal stroma layers of the target object;

[0026] Separate the layers of the cornea.

[0027] The beneficial effects of the present invention are: the present invention provides a corneal interlaminar lens implantation device and a corneal interlaminar lens implantation system. The device can be pushed and flattened at the same time when implanting the corneal interlaminar lens, requiring a smaller incision and not easily curling. Attached Figure Description

[0028] Figure 1 This is an exemplary flowchart of a corneal interlaminar lens implantation system according to some embodiments of this specification.

[0029] Figure 2 This is a schematic diagram illustrating an exemplary interlaminar lens implantation according to some embodiments of this specification.

[0030] Figure 3 This is a schematic diagram of the front view of an exemplary implantable device and a partially enlarged view of its end portion, as shown in some embodiments of this specification, wherein the unfolding structure is in an unfolded state and the middle rod is provided with a fork.

[0031] Figure 4 This is a schematic diagram of the side view structure and a partially enlarged end structure of an exemplary implantable device according to some embodiments of this specification, wherein the unfolding structure is in an unfolded state and the middle rod is provided with a fork.

[0032] Figure 5 This is a partial enlarged longitudinal sectional view of the lower end of an exemplary implantable device shown in some embodiments of this specification, wherein the unfolding structure is in an unfolded state and the middle rod is provided with a fork.

[0033] Figure 6 This is a partial enlarged structural diagram of the lower end of an exemplary implantable device shown in some embodiments of this specification, wherein the unfolding structure is in an unfolded state and the middle rod is provided with a fork.

[0034] Figure 7 An exemplary enlarged front view of the end of an implantable device, as shown in some embodiments of this specification, is provided with a small ball structure at the end of the intermediate rod.

[0035] Figure 8 This is a schematic diagram of an interlaminar lens implantation device. Detailed Implementation

[0036] The invention will be further described below with reference to the accompanying drawings. An interlaminar lens implantation device includes an outer sheath and an inner push rod disposed within the outer sheath, the inner push rod and the outer sheath changing relative positions. An extension structure is disposed at the first end of the inner push rod. When the extension structure retracts into the outer sheath, it is in a contracted state; when it extends out of the outer sheath, it is in an extended state. The extension structure has different extension widths depending on the length it extends from the outer sheath. The extension structure includes extension rods on both sides. In the extended state, the extension rods extend the lens, and the friction between the extension rods and the lens provides a pushing effect. Alternatively, the extension structure may also include a middle rod, with a fork at its end. The lens is placed in the middle of the fork, and the middle rod provides a pushing effect. In the extended state, the extension rod only extends the lens.

[0037] Because the interlaminar lenticule is a thin and easily rolled-up sheet-like structure, it needs to be unfolded before implantation. Therefore, a special implantation instrument is required. (See reference...) Figure 2-6 Specifically, the implantable device includes an outer tube 71 and an inner push rod 72. The inner push rod 72 is located inside the outer tube 71, and a spreading structure 73 is provided at the first end of the inner push rod 72. The relative position of the inner push rod 72 and the outer tube 71 changes. When the spreading structure 73 is retracted inside the outer tube 71, it is in a contracted state; when the spreading structure 73 extends into the outer tube 71, it is in an unfolded state. The unfolded width varies depending on the length of the spreading structure 73 extending from the outer tube 71. The spreading structure 73 includes two spreading rods 731 on both sides and a middle rod 732 in the middle. The central axes of the spreading rods 731 and the middle rod 732 in the unfolded state are on the same plane. In the unfolded state, the spreading rods 731 play a role in unfolding the lens. The friction between the spreading rods 731 and the middle rod 732 and the lens plays a pushing role. Alternatively, a fork is provided at the end of the middle rod 732, and the lens is placed in the middle of the fork. The fork of the middle rod 732 plays a pushing role. In the unfolded state, the spreading rods 731 only play a role in unfolding the lens. It should be noted that although the scheme shown in the attached diagram includes the intermediate rod 732, when the pushing force is exerted through friction, only two unfolding rods 731 need to be provided. The unfolding of the unfolding rods can be achieved by their own elasticity.

[0038] The working method of the implementation of the forkless part of the intermediate rod 732 is as follows, referring to... Figure 7In the contracted state, the inner push rod 72 enters the corneal space along with the outer sleeve 71 and contacts the rolled-up lens within the corneal layers. Maintaining the position of the outer sleeve 71, the unfolding structure 73 is pushed out from the outer sleeve 71, positioning the unfolding rod 731 above the lens. During the extension of the unfolding rod 731, the distance between the two unfolding rods 731 increases, unfolding the rolled-up lens and maintaining the unfolding effect of the unfolding rod 731 on the lens. The ends of the unfolding rod 731 and the intermediate rod 732 are in close contact with the lens, creating a static friction force that propels the lens forward, providing the driving force. In a more preferred embodiment, in the unfolded state, the end of the intermediate rod 732 is positioned lower than the end of the unfolding rod 731. This arrangement ensures a stable triangular pushing structure 75 and reduces the overall length of the pushing structure 75. Specifically, the ends of the intermediate rod 732 and the unfolding rod 731 are located away from the outer sleeve 71. In the unfolded state, the distance between the end of the intermediate rod 732 and the end of the outer sleeve 71 is smaller than the distance between the unfolding rod 731 and the end of the outer sleeve 71.

[0039] The working method of the implementation of the forked part of the intermediate rod 732 is as follows, refer to Figures 5-6 In the contracted state, the inner push rod 72 enters the corneal space along with the outer tube 71 and contacts the rolled-up lens between the corneal layers. Then, keeping the position of the outer tube 71 unchanged, the unfolding structure 73 is pushed out of the outer tube 71 slightly. When the middle rod 732 extends out of the outer tube 71 before the unfolding rod 731, the upper and lower forks 7321 of the fork part are first positioned on both sides of the lens, causing the lens to deform. This allows the unfolding rod 731 to be positioned inside the rolled-up lens. During the process of pushing out the unfolding structure 73, the rolled-up lens is unfolded. Then, using the pushing force of the fork rod 7321 and the unfolding action of the unfolding rod 731, the lens is sent into the accurate position in an unfolded state. This method ensures that the fork lever 7321 is set up first, making the entire process smoother. When the intermediate lever 732 extends out of the outer tube 71 after the unfolding lever 731, the unfolding lever 731 is first inserted into the curled lens, and then slowly extended to fully unfold the curled lens. After unfolding, the intermediate fork lever 7321 also extends, and then the entire instrument is withdrawn and inserted so that the edge of the fork contacts the edge of the lens. Then, the fork and lens are adjusted to allow the lens to enter the fork, and then the fork provides a pushing action. This method avoids the risk of the fork lever 7321 deforming the lens and can better cooperate with the unfolding lever 731 to perform both pushing and unfolding functions.

[0040] A more preferred embodiment is described in reference to... Figure 3An operating handle 74 is provided at the rear end of the outer sleeve 71. A pushing structure 75 connected to the inner push rod 72 is provided on the operating handle 74. The operating handle 74 has two positions: a retracted position for the inner push rod 72's extension / expansion structure 73 in the retracted state and an extended position for the inner push rod 72 in the fully extended state. When the pushing structure 75 is in the retracted position, the extension / expansion structure 73 is in the retracted state; when the pushing structure 75 is in the extended position, the extension / expansion structure 73 is in the fully extended state. A moving groove 76 for the pushing structure 75 is provided on the operating handle 74 to allow the pushing structure 75 to move between the retracted and extended positions. The pushing structure 75 can stop at any position between the retracted and extended positions to ensure that the degree of extension of the unfolding rod 731 can be adjusted as needed. The pushing structure 75 is in close contact with the moving groove 76, and the pushing structure 75 will not move without external force. This design ensures that the pushing structure 75 can be stably stopped at any position, guaranteeing that the unfolding rod 731 exists in any desired extended state. In addition, to ensure positional stability, a locking structure can be provided on the push structure 75. The locking structure can be any structure that locks the push structure 75 to the operating handle 74, such as a locking nut or a locking fork 7321.

[0041] A more preferred embodiment is, referring to Figure 6 and Figure 7 A small ball structure 733 is provided at the end of the unfolding rod 731. The small ball structure 733 can avoid damage to the tissue during operation. When the static friction force is the driving force, a small ball structure 733 is also provided at the end of the intermediate rod 732. The small ball structure 733 is a rough ball. The rough surface can ensure that it provides effective static friction force when in contact with the lens, and ensure the driving effect on the lens.

[0042] A more preferred embodiment is that, in the contracted state, the center of the small ball structure 733 and the center of the fork are on the same straight line, and the small ball structure 733 extends into the fork; in the contracted state, the width of the unfolding rod 731 and the intermediate rod 732 is equal to the sum of the diameters of the two small ball structures 733; this arrangement can ensure that it is contracted within the outer sheath tube 71 with the minimum thickness, reducing the outer diameter of the outer sheath tube 71, thereby reducing the incision size required for the outer sheath tube 71 to enter the cornea, and reducing the harm to the patient during lens implantation.

[0043] Both the unfolding rod 731 and the intermediate rod 732 are set as plate-shaped rods with a plate thickness of 0.1mm. By setting them as plate-shaped structures, the thickness of the unfolding rod 731 and the intermediate rod 732 in the retracted state can be avoided while ensuring the overall strength, so that they can be better retracted into the outer sleeve 71.

[0044] The two unfolding rods 731 have an unfolding distance of 24mm when fully unfolded; it can also be any distance between 20-30mm; the middle rod 732 is a straight rod with a length range of 20-25mm.

[0045] When the middle rod 732 includes the fork, the outer distance between the two forks 7321 is 0.75mm, and the fluctuation range is 0.2mm; the inner distance between the two forks 7321 is 0.4mm, and the fluctuation range is 0.2mm.

[0046] The diameter of the spherical structure 733 is 0.6 mm; the fluctuation range is 0.2 mm.

[0047] The overall length of the implantable device is 148 mm; the fluctuation range is 20 mm, wherein the longitudinal axis of the operating handle 74 is consistent with the longitudinal axis of the outer sleeve 71; the length of the operating handle 74 is 90 mm; the fluctuation range is 10 mm; this range can meet the needs of extending and pushing the interlaminar lens.

[0048] When the propulsion is achieved through friction, the extension and pushing structure also includes an intermediate rod. In the extended state, the end of the intermediate rod is lower than the end of the extension rod.

[0049] An operating handle is provided at the rear end of the outer tube. A pushing structure connected to the inner push rod is provided on the operating handle. The operating handle is provided with a contracted position of the inner push rod's pushing structure in the contracted state and an extended position of the inner push rod's pushing structure in the fully extended state. When the pushing structure is in the contracted position, the pushing structure is in the contracted state, and when the pushing structure is in the extended position, the pushing structure is in the fully extended state.

[0050] A small ball structure is set at the end of the unfolding rod. When the static friction force is the driving force, a small ball structure is also set at the end of the middle rod.

[0051] The sphere has a rough sphere structure.

[0052] The top of the intermediate rod has a forked structure.

[0053] An interlaminar lens implantation system includes:

[0054] The positioning unit performs visual axis positioning on the target object and determines the visual axis center of the target object;

[0055] The cutting unit is used to create a corneal implantation cavity for the target object based on the data determined by the positioning unit;

[0056] An implantation unit, comprising a corneal interlaminar lens implantation device as described above, for implanting a lens into the corneal implantation cavity of the target object, thereby aligning the lens with the visual axis center of the target object.

[0057] The entire system also includes a control center, which receives data from the positioning unit and sends it to the cutting unit. The cutting unit moves according to a prescribed route. The cutting unit can be a laser cutting unit, specifically a femtosecond laser device; or the movement of the cutting unit can be operated by a robotic arm used in ophthalmic surgery, such as in Chinese patent publication number CN112168482A.

[0058] The positioning unit is an excimer laser device, and determining the visual axis center based on the built-in positioning system and / or corneal topography includes:

[0059] Set the cutting diameter and depth of cut using PTK mode;

[0060] Import pupil offset from corneal topography map;

[0061] Determine the center of the visual axis.

[0062] The cutting unit creates the corneal implant cavity for the target object, including:

[0063] Based on the cutting diameter and cutting depth, cutting is performed between the corneal stroma layers of the target object;

[0064] Separate the layers of the cornea.

[0065] Figure 1 This is an exemplary flowchart of an interlaminar lens implantation system according to some embodiments of this specification. Flow 100 is an exemplary flowchart of an interlaminar lens implantation system. Figure 1 As shown, process 100 includes the following steps.

[0066] Step 110: Locate the visual axis of the target object and determine the visual axis center of the target object.

[0067] The target patient refers to the individual who requires interocular lens implantation, such as a patient with vision problems. Visual axis localization refers to locating the center of the visual axis of the target patient.

[0068] In some embodiments, visual axis localization of a target object and determination of the visual axis center of the target object includes: determining the visual axis center using an excimer laser device based on a built-in positioning system and / or corneal topography.

[0069] In some embodiments, determining the visual axis center using an excimer laser device based on a built-in positioning system and / or corneal topography includes: setting the cutting diameter and cutting depth using PTK (Phototherapeutic Keratectomy) mode; importing the pupil offset from the corneal topography; and determining the visual axis center.

[0070] In some embodiments, the cutting diameter and cutting depth can be set as needed. For example, the cutting depth is related to the implant characteristics, biomechanical safety, and optical performance of the implanted lens.

[0071] In some embodiments, the cutting diameter may be 0.5 mm.

[0072] In some embodiments of this specification, by setting the cutting diameter to 0.5 mm, more precise corneal ablation can be achieved, reducing damage to the cornea.

[0073] In some embodiments, the cutting diameter may also be 0.3 mm, 0.4 mm, etc.

[0074] In some embodiments, the cutting depth can be 30-40 μm.

[0075] In some embodiments, the cutting depth can be 32μm, 34μm, 36μm, 38μm, 40μm, etc.

[0076] In some embodiments, the cutting depth can be 30-35 μm, 35-40 μm, etc.

[0077] In some embodiments, the cutting depth can be 30-32μm, 32-34μm, 34-36μm, 36-38μm, 38-40μm, etc.

[0078] In some embodiments of this specification, by setting the cutting depth to 30-40 μm, the appropriate depth of the corneal implant cavity can be ensured, thereby improving the stability of the lens.

[0079] Pupil offset refers to the offset distance between the center of the pupil of a target object and the ideal optical center. The ideal optical center can be the geometric center of the cornea.

[0080] In some embodiments of this specification, visual axis positioning can be improved by using an excimer laser device, a built-in positioning system, and corneal topography, thereby improving the accuracy of positioning, enabling the lens to be more precisely aligned with the visual axis, significantly reducing problems such as glare, halo, and higher-order aberrations caused by deviance, and improving postoperative visual clarity and patient satisfaction.

[0081] In some embodiments, the interocular lens implantation system further includes: staining the visual axis center of the target object.

[0082] In some embodiments of this specification, the center of the visual axis is stained to facilitate user identification of its location, thereby improving the accuracy and convenience of implantation.

[0083] Step 120: Create the corneal implantation cavity for the target object.

[0084] A corneal implant cavity is a cavity structure created during corneal implantation. In some embodiments, a corneal implant cavity may include a corneal tunnel or a capsular bag, etc.

[0085] In some embodiments, creating a corneal implant cavity for the target object includes: creating the corneal implant cavity for the target object according to preset conditions using a laser device. The preset conditions are set based on factors such as the patient's corneal curvature, thickness, expected correction amount, and graft type. A laser device refers to a device that uses laser technology to ablate the interlayer of the corneal stroma. For example, a laser device may include a femtosecond laser device.

[0086] In some embodiments, creating a corneal implant cavity for the target object includes: cutting between the corneal stroma layers of the target object based on the cutting diameter and cutting depth; and separating the corneal layers. For details on the cutting diameter and cutting depth, please refer to step 110 and related descriptions.

[0087] In some embodiments, corneal stromal layers of the target object are cut to a set cutting diameter and cutting depth to obtain a corneal implant cavity.

[0088] In some embodiments, the separation of corneal layers can be accomplished using a separator. A separator is a device for separating different layers of the cornea, such as the anterior elastic lamina, the stroma, or the endothelium. In some embodiments, excess corneal stroma can be removed using a separator during the ablation process.

[0089] In some embodiments, the separator is a lens separator. Excess corneal stroma during the cutting process can be removed using the lens separator.

[0090] In some embodiments of this specification, the lens separator used is more conforming to the anatomy of the cornea, which can reduce mechanical damage to surrounding tissues and lower the risk of postoperative complications. At the same time, the lens separator has high precision, which can more effectively separate the corneal layers and ensure successful lens implantation.

[0091] In some embodiments of this specification, precise cutting within the corneal stroma using a laser device can create a cavity suitable for lens implantation, improving the success rate of implantation. A separator ensures the removal of corneal tissue during implantation, thereby enhancing the safety and effectiveness of the procedure.

[0092] In some embodiments, the incision between the corneal stroma layers is located on the temporal side of the target object, and the width of the incision is greater than or equal to the lens diameter.

[0093] The incision site refers to the incision made into the surface of the cornea. The width of the incision site refers to the width of the incision on the corneal surface.

[0094] In some embodiments, the size of the implant cavity is slightly larger than the size of the lens (e.g., the width of the implant cavity is 1 mm larger than the diameter of the lens) to ensure that the implant fits the surrounding tissues well and avoid displacement or rejection.

[0095] In some embodiments of this specification, by placing the cutting inlet on the temporal side, damage to the cornea can be reduced and lens implantation can be facilitated.

[0096] Step 130: Adjust intraocular pressure on the target subject.

[0097] In some embodiments, adjusting intraocular pressure on a target object includes: making an incision around the cornea of ​​the target object, releasing aqueous humor, and reducing intraocular pressure.

[0098] In some embodiments, the incision can be made using a corneal incision knife or a micro-scissor device.

[0099] In some embodiments, the incision is made using a 15° puncture knife.

[0100] In some embodiments of this specification, the incision is made by using a 15° puncture knife in the intraocular pressure adjustment device, which can precisely control the intraocular pressure adjustment process, ensure the accuracy and safety of the incision, and improve the efficiency and stability of intraocular pressure adjustment.

[0101] In some embodiments of this specification, reducing intraocular pressure can reduce corneal tension, keeping the stromal tunnel in a low-tension state, making the lens easier to implant and more stable; it can greatly shorten the operation time, reduce corneal ectasia or incision tension-related complications; and reduce repeated traction on corneal tissue during surgery, avoiding lens deformation or positional deviation due to excessive resistance.

[0102] Step 140: Insert the lens into the corneal implant cavity of the target object, aligning the lens with the center of the target object's visual axis.

[0103] In some embodiments, the thickness and implantation depth of the lens can be set as needed. Lenses with different thicknesses and implantation depths can achieve different corrective effects after implantation. The refractive power of the lens needs to be higher than the expected correction power to avoid undercorrection.

[0104] In some embodiments, using an implantation device to implant a lens into the corneal implantation cavity of a target object, aligning the lens with the visual axis center of the target object, includes: implanting the lens into the corneal implantation cavity; adjusting the lens to align the lens with the visual axis center.

[0105] In some embodiments of this specification, by adjusting the alignment of the lens with the center of the visual axis, the optimal position of the lens can be ensured, thereby improving the vision correction effect.

[0106] Figure 2This is a schematic diagram illustrating exemplary corneal interlaminar lens implantation according to some embodiments of this specification. Examples include... Figure 2 As shown, the corneal interlayer lens implantation system includes: staining and marking the visual axis center 2 on the cornea 1, using a femtosecond laser device to cut between the corneal stroma layers to obtain the cutting inlet 3 and the corneal implantation cavity 4, cutting an incision 5 on the outer side of the cornea using an intraocular pressure adjustment device, releasing aqueous humor from the incision 5, and using an implantation instrument to implant the lens 6 into the corneal implantation cavity 4 through the cutting inlet 3.

[0107] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention. The embodiments should not be considered as limiting the invention, but any improvements made based on the spirit of the invention should be within the scope of protection of the invention.

Claims

1. A corneal interlaminar lens implantation device, comprising an outer sheath, characterized in that: it further comprises... The inner push rod is located inside the outer tube, and the relative position of the inner push rod and the outer tube changes. The extension and push structure is located at the first end of the inner push rod. When the extension and push structure retracts into the outer tube, it is in a retracted state. When the extension and push structure extends into the outer tube, it is in an extended state. The extension width of the extension and push structure varies depending on the length of its extension from the outer tube. The extension and push structure includes extension rods on both sides. In the extended state, the extension rods play an role in extending the lens, and the friction between the extension rods and the lens plays a pushing role. Alternatively, the unfolding structure may also include a central rod with a fork at its end, where the lens is placed in the middle of the fork. The middle rod has a pushing function, and the unfolding rod in the unfolded state only has an unfolding function for the lens. The end of the unfolding rod is provided with a small ball structure, and the small ball structure is a rough ball. The rough surface can ensure that it provides effective static friction when in contact with the lens.

2. The corneal interlaminar lens implantation device according to claim 1, characterized in that: When the propulsion is achieved through friction, the extension and pushing structure also includes an intermediate rod. In the extended state, the end of the intermediate rod is lower than the end of the extension rod.

3. The corneal interlaminar lens implantation device according to claim 1, characterized in that: An operating handle is provided at the rear end of the outer tube. A pushing structure connected to the inner push rod is provided on the operating handle. The operating handle is provided with the contracted position of the inner push rod's pushing structure in the contracted state and the fully extended position of the inner push rod's pushing structure in the fully extended state. When the pushing structure is in the contracted position, the extending structure is in a contracted state; when the pushing structure is in the extended position, the extending structure is in a fully extended state.

4. The corneal interlaminar lens implantation device according to claim 1, characterized in that: When static friction is the driving force, a small ball structure is set at the end of the middle rod.

5. A corneal interlaminar lens implantation device according to claim 1 or 4, characterized in that: The spherical structure is a rough sphere.

6. A corneal interlaminar lens implantation system, characterized in that, include: The positioning unit performs visual axis positioning on the target object and determines the visual axis center of the target object; The cutting unit is used to create a corneal implantation cavity for the target object based on the data determined by the positioning unit; An implantation unit, comprising a corneal interlaminar lens implantation device as described in any one of claims 1-5, for implanting a lens into the corneal implantation cavity of the target object, thereby aligning the lens with the visual axis center of the target object.

7. The corneal interlaminar lens implantation system according to claim 6, characterized in that: The positioning unit is an excimer laser device, and determining the visual axis center based on the built-in positioning system and / or corneal topography includes: Set the cutting diameter and depth of cut using PTK mode; Import pupil offset from corneal topography map; Determine the center of the visual axis.

8. A corneal interlaminar lens implantation system according to claim 7, characterized in that: The cutting unit creates the corneal implant cavity for the target object, including: Based on the cutting diameter and cutting depth, cutting is performed between the corneal stroma layers of the target object to form separable corneal interlayers.

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