Pre-installed intraocular lens implant device

Abstract

The present invention provides a pre-installed intraocular lens implantation device for improving the reliability of the movement of the front support haptic of an intraocular lens. A pin hole (201) is formed on an intraocular lens implanter (1), and the pin hole (201) is located between the optical part (6) of the intraocular lens (5) and the front end (7a2) of the front support haptic (7a) in the front-back direction. A limit seat has a limit pin (42), and the limit pin is inserted into the implantation head (2) through the pin hole and is located between the optical part (6) of the intraocular lens (5) and the front end (7a2) of the front support haptic (7a) to limit the movement of the intraocular lens (5) forward. The front surface of the limit pin (42) facing the front end (7a2) of the front support haptic (7a) has a guide surface (42b), and the guide surface (42b) is composed of an inclined surface extending obliquely toward the rear and upward.

Description

Technical Field

[0001] The invention relates to a preassembled artificial lens implantation device. Background Art

[0002] An intraocular lens is an artificial lens that is implanted during cataract surgery to replace the natural lens in the eye that has become cloudy due to cataract disease.

[0003] The shape of an artificial lens usually consists of a circular optical part located in the center and a peripheral supporting loop. According to the different materials used to process the artificial lens, artificial lenses can be divided into hard artificial lenses and soft artificial lenses. Due to the non-foldability of the material, hard artificial lenses can only be implanted by making a surgical incision on the cornea that is roughly the same width as the diameter of the optical part of the lens. Soft artificial lenses are foldable due to their soft material. A smaller surgical incision (usually 2-3 mm) can be made on the cornea to implant the folded or curled soft artificial lens into the eye after reducing its area. This folded or curled artificial lens can automatically unfold after entering the eye due to the characteristics of the soft material itself.

[0004] In order to implant the soft intraocular lens into the eye, a special intraocular lens implantation device is required, which has an inner cavity design that allows the intraocular lens to be folded and a slender tubular passage structure design. By using this special intraocular lens implantation device, the soft intraocular lens can be implanted into the human eye through a small incision less than 3 mm. This special intraocular lens implantation device can be divided into pre-installed intraocular lens implantation devices and non-pre-installed intraocular lens implantation devices according to whether the intraocular lens product is built-in.

[0005] The ideal folding or curling state of the intraocular lens is that the lower surface of the optical part of the lens is folded toward the upper surface of the optical part, and at the same time, the front and rear support loops of the lens are folded above the upper surface of the optical part and are wrapped in the folded optical part. In the structural design process of the preloaded intraocular lens implanter, after the lens is placed in the lens bearing area of ​​the implanter, its rear support loop is close to the injection component of the implanter. When the injection component performs the injection action, it can push the rear support loop forward to fold it. It is relatively easy to realize the action of folding the rear support loop to the upper surface of the optical part of the lens. Relatively speaking, how to ensure and improve the reliability of the action of folding the front support loop to the upper part of the optical part of the lens is a problem that needs to be considered in the design of the preloaded intraocular lens implanter and is difficult to achieve.

[0006] In addition, the design of the preloaded intraocular lens implanter also needs to consider how to pre-place the intraocular lens in the implanter and ensure that the position and state of the intraocular lens after pre-placement are not affected by factors such as transportation and handling, and how to simplify the lens implantation operation steps.

[0007] The action of folding the anterior support haptic of the pre-installed artificial lens to above the optical part of the lens usually requires the cooperation of a special cavity cross-section design of the transition part of the implant head, that is, after the injection action begins, the anterior support haptic of the lens contacts the side surface of the cavity of the transition part of the implant head during the movement from the transition part of the implant head toward the tubular nozzle of the implant head, and the contact causes the advancement of the anterior support haptic to be obstructed, but at this time the optical part of the lens continues to move forward under the action of the injection component, thereby causing the anterior support haptic to fold, the optical part of the lens continues to move forward, and the anterior support haptic continues to fold, thereby achieving the action of folding to above the upper surface of the optical part of the lens.

[0008] The above is the process of realizing the action of folding the anterior support loop during the injection process while the anterior support loop of the lens always maintains the theoretical state. However, because the state of the anterior support loop of the lens pre-placed in the implanter is theoretically not constrained, the state of the anterior support loop of the lens is likely to be affected by the injected viscoelastic agent during the actual operation, that is, the injected viscoelastic agent flow is likely to flush the anterior support loop away from the theoretical state, causing the anterior support loop to be thrown forward or folded back backward, and ultimately causing the anterior support loop to deviate from the theoretical state and fail to be folded smoothly.

[0009] In addition, Patent Document 1 (US9572710B1) and Patent Document 2 (US7156854B2) respectively disclose a pre-installed intraocular lens implanter for a one-piece L-shaped haptic structure intraocular lens. Here, the following briefly describes how the pre-installed intraocular lens implanter of the above patent documents realizes the folding of the anterior support haptic, how to prevent the lens from moving toward the implant head, and the injection operation steps.

[0010] The operation steps of the pre-installed intraocular lens implanter of Patent Document 1 are as follows: first, inject viscoelastic agent, then remove the limit seat assembled above the front surface of the implant head component of the pre-installed intraocular lens implanter to cancel the constraint of the forward movement of the lens component, remove the implanter from the entire implanter support frame component, slide the first sliding component, and push the implanter push-injection component to complete the lens implant push-injection action. The pre-installed intraocular lens implanter of Patent Document 1 is to assemble a limit seat above the implant head component, and the limit pin feature of the limit seat is located just in front of the front vertex of the edge of the optical part of the lens after passing through the upper wall assembly hole of the implant head, thereby playing a role in limiting the forward movement of the crystal before the implantation operation. The transition section of the cavity channel of the implant head of Patent Document 1 is located in front of the main body lens bearing area, and two inclined rib features are designed on the left and right sides of the lower bottom surface of the inner surface of the transition section. During the push injection process, the front support haptic and the optical part of the lens are lifted when passing through the inclined rib features. The optical part of the lens is subsequently subjected to a force directed to the lower bottom surface of the transition section under the action of the front end pressing plate of the first sliding part of the implanter, so that the front support haptic of the lens is higher than the upper surface of the optical part of the lens. Subsequently, with the cooperation of the side wall of the transition section of the implant head, the front support haptic completes the work of folding to the top of the optical part of the lens. From the above description, it can be seen that the pre-installed intraocular lens implanter of Patent Document 1 has many operating steps, the limit seat is designed to be assembled above the implant head component, and the inner surface design of the transition section of the implant head is complex, which will affect the reliability of the folding action to a certain extent.

[0011] The operation steps of the pre-installed intraocular lens implanter of Patent Document 2 are as follows: first, the viscoelastic agent is injected, and then the limit seat assembled above the front surface of the implant head of the pre-installed intraocular lens implanter is removed to cancel the constraint of the forward movement of the lens component, and the implanter push-injection component is pushed to complete the lens implantation push-injection action. The pre-installed intraocular lens implanter of Patent Document 2 is assembled with a limit seat above the implant head component, and the limit pin feature of the limit seat passes through the upper wall assembly hole of the implant head and is located just in front of the front vertex of the edge of the optical part of the lens, thereby limiting the forward movement of the lens before the implantation operation. The transition part of the inner cavity of the implant head of Patent Document 2 is located in front of the crystal bearing area of ​​the main body. The transition part of the implant head of Patent Document 2 is designed through the inner cavity section so that the gap between the lower surface of the transition part and the lower surface of the optical part of the crystal is smaller than the thickness of the front support loop. Therefore, when the front support loop contacts the left wall of the transition part of the implant head and folds during the implantation and injection movement of the crystal, the risk of the crystal folding below the lower surface of the optical part is avoided because the gap between the lower surface of the transition part of the implant head and the lower surface of the optical part of the crystal is small, thereby completing the folding of the front support loop. From the above description, it can be seen that because the lower surfaces of the optical parts of lenses of different degrees are inconsistent, the pre-installed intraocular lens implanter of Patent Document 2 has the risk of insufficient matching and the risk that the front support loop is folded but not folded to the upper surface of the optical part of the crystal.

[0012] In addition, a pre-installed intraocular lens implanter product is also disclosed in Patent Document 3. However, this product does not fully consider the effect of the viscoelastic flow on the change of the state of the anterior support haptic during the injection of the viscoelastic, and there is a problem that the folding action of the anterior support haptic during the injection process is unstable, and the reliability needs to be improved.

[0013] Prior art literature

[0014] Patent document 1: US9572710B1

[0015] Patent document 2: US7156854B2

[0016] Patent document 3: CN104414774B Summary of the invention

[0017] In view of the above, the present invention is proposed, and its object is to provide a pre-installed intraocular lens implantation device that improves the reliability of the folding action of the anterior haptic of the intraocular lens.

[0018] To achieve the above-mentioned purpose, the preinstalled intraocular lens implantation device of the present invention comprises an intraocular lens and an intraocular lens implanter, wherein the intraocular lens is preinstalled inside the intraocular lens implanter, and comprises an optical part and a front support haptic arranged on the front side of the optical part, and on the intraocular lens implanter, a front support haptic guide component is arranged at a position between the optical part and the front support haptic, and the front support haptic guide component can guide the front support haptic to produce an upward displacement when the front support haptic moves backward.

[0019] With the above structure, a front support haptic guide component is provided between the optical part and the front support haptic. The guide component can guide the front support haptic to produce an upward displacement when it moves backward due to the impact of the viscoelastic agent, for example. Therefore, the reliability of the action of folding the front support haptic onto the upper surface of the optical part can be improved.

[0020] Preferably, the preinstalled intraocular lens implantation device also includes a limit seat, a pin hole is formed on the intraocular lens implanter, the pin hole is located between the optical part of the intraocular lens and the front end of the front support haptic in the front-to-back direction, the limit seat has a limit pin, the limit pin is inserted into the intraocular lens implanter through the pin hole and is located between the optical part of the intraocular lens and the front end of the front support haptic to limit the forward movement of the intraocular lens, and the front support haptic guide component is the limit pin.

[0021] By adopting the above structure, the front support haptic guide component is formed by using the limit pin that limits the forward movement of the artificial lens. In this way, the number of components can be reduced, the structure is simplified, and the manufacturing cost can be reduced.

[0022] In the present invention, preferably, a guide surface is formed on the front surface of the limit pin facing the front support haptic, and the guide surface is composed of an inclined surface extending obliquely backward and upward.

[0023] With the above structure, since the front surface of the limit pin facing the front end of the front support haptic has a guide surface, and the guide surface is composed of an inclined surface extending obliquely toward the rear and upward, when the front support haptic moves backward, for example due to the impact of the viscoelastic agent, it will be lifted upward under the guidance of the guide surface extending obliquely toward the rear and upward, thereby improving the reliability of the action of folding the front support haptic onto the upper surface of the optical part.

[0024] Preferably, in the present invention, a perfusion port for perfusing viscoelastic agent into the intraocular lens implanter is formed on the intraocular lens implanter, and the perfusion port is located in front of the front end of the front supporting haptic in the front-back direction.

[0025] According to the present invention, when the viscoelastic agent injected from the injection port impacts the front support haptic of the artificial lens backward, a guide surface is formed on the limit pin located behind the front end portion of the front support haptic, and the guide surface is composed of an inclined surface extending obliquely toward the rear and upward. Therefore, the front support haptic can be guided by the guide surface to generate an upward displacement, thereby improving the reliability of the action of folding the front support haptic onto the upper surface of the optical part.

[0026] Preferably, the inclined surface constituting the guide surface can be a straight surface or a convex or concave curved surface when viewed in the left-right direction, or any combination of the foregoing items. The front surface of the stop pin can include a vertical surface located at the lower side and the guide surface located at the upper side.

[0027] Preferably, in the present invention, the rear surface of the stop pin facing the optical portion of the intraocular lens is composed of a vertical surface that is vertical when viewed from the left and right directions.

[0028] With the above structure, the vertical surface can reliably block the forward movement of the optical part of the artificial lens.

[0029] Preferably, the present invention further comprises an inner packaging member for packaging the intraocular lens implanter, the limiting seat further comprises a supporting seat, the limiting pin is integrally formed on the supporting seat, and the supporting seat is mounted on the inner packaging member.

[0030] With the above structure, the limiting seat is installed on the inner package, that is, the limiting seat and the inner package are formed separately, so the limiting seat with a more complicated structure due to the limiting pin can be easily manufactured.

[0031] Preferably, the inner packaging is a blister and the stopper is an injection molded part. With such a structure, the stopper is formed by an injection molding method different from that of the inner packaging, and the stopper can be easily manufactured. Preferably, when viewed in the left-right direction, the width of the stopper pin in the front-to-back direction is set to be the same as the distance between the front end of the front support haptic and the front edge of the optical part.

[0032] Preferably, in the present invention, the front supporting haptic and the rear supporting haptic extend forward and backward from the optical portion, respectively, and are in the shape of arms having a base end and a free end.

[0033] Preferably, the intraocular lens implanter of the preinstalled intraocular lens implantation device comprises: an implanter body, which has an intraocular lens bearing portion, and the intraocular lens is arranged on the intraocular lens bearing portion; an implantation head, which is used to implant the intraocular lens into a human eye, and the implantation head causes the intraocular lens to deform when the intraocular lens passes through its inner cavity, and the pin hole is formed at the lower part of the implantation head.

[0034] In the present invention, preferably, in the vertical direction, the guide surface is formed at least at a portion of the front surface of the stop pin whose height is above the lower bottom surface of the intraocular lens bearing portion, so that the guide surface can reliably guide the front support haptic. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a stereoscopic diagram schematically showing the overall structure of an intraocular lens implanter in a specific embodiment of the present invention;

[0036] Figure 2 is a schematic diagram showing the exploded structure of the above-mentioned intraocular lens implanter;

[0037] Figure 3 is a perspective view of the implant head of the pre-installed intraocular lens implanter observed from the direction of the lower through hole;

[0038] Figure 4 is a partial enlarged cross-sectional view schematically showing the assembly state of the implant head of the pre-assembled intraocular lens implanter and the limiting seat;

[0039] Figure 5 is a partial enlarged view schematically showing the assembly of the limit seat and the inner packaging component;

[0040] Figure 6 It is a partial enlarged cross-sectional view schematically showing the assembly state of the implant head and the limit seat of the preassembled intraocular lens implanter of the present invention;

[0041] Figure 7 This is a top view of the intraocular lens.

[0042] Description of Reference Numerals

[0043] 1. Intraocular lens implanter; 2. Implantation head; 2a. Nozzle part of implantation head; 2b. Transition part of implantation head; 201. Pin hole; 3. Implantation device body; 3a. External thread; 4. Spiral tube; 5. Intraocular lens; 6. Optical part of intraocular lens; 7a. Front support haptic of intraocular lens; 7b. Back support haptic of intraocular lens; 8. Pressing tablet; 9. Push pin; 10. Push rod; 11. Intraocular lens bearing part at the front end of implantation device body; 12. Back section of implantation device body; 30. Inner packaging; 40. Limit seat; 41. Support seat of limit seat; 42. Limit pin of limit seat. DETAILED DESCRIPTION

[0044] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0045] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0046] Figure 1 is a perspective view schematically showing the overall structure of the intraocular lens implanter of the present embodiment; Figure 2 It is an exploded perspective view schematically showing the structure of the intraocular lens implanter according to the present embodiment. Figure 3 It is a perspective view of the assembly through hole direction below the implant head component of the pre-assembled intraocular lens implanter; Figure 4 is an enlarged cross-sectional view schematically showing the assembly state of the implant head of the preassembled intraocular lens implanter and the limiting seat; Figure 5 is a partial perspective view schematically showing the assembly of the limiting seat and the inner packaging component; Figure 6 It is a partial enlarged cross-sectional view schematically showing the assembly state of the implant head and the limit seat of the preassembled intraocular lens implanter of the present invention; Figure 7 This is a top view of the intraocular lens.

[0047] In this embodiment, in order to clarify the relative position relationship and movement direction of each part of the intraocular lens implanter, the front, back, left, right, up and down directions are defined, wherein the front and back direction is consistent with the axial direction of the slender intraocular lens implanter, the left and right direction is consistent with the width direction of the intraocular lens implanter, and the up and down direction is consistent with the height direction of the intraocular lens implanter. Figure 1 Furthermore, these defined directions are also applicable in other embodiments.

[0048] In addition, the term "optical part" used in the present application refers to a portion of an intraocular lens that has optical properties and can achieve the main function of adjusting the refractive power of the intraocular lens.

[0049] The term "haptic" used in the present application refers to a portion connected to the optical part of the intraocular lens, which plays a role in supporting the optical part and transmitting the contraction force generated by the contraction and varicose contraction of the ciliary muscle to the optical part.

[0050] The term "intraocular lens implanter axis" as used in this application refers to the longitudinal centerline of the elongated intraocular lens implanter.

[0051] The term "lower optical surface" (corresponding to the first optical surface in the present invention) used in this application is relative to the upper optical surface of the optical part of the artificial lens (corresponding to the second optical surface in the present invention). The lower optical surface of the optical part of the artificial lens pre-installed in the implanter refers to the optical part surface that contacts the upper surface of the artificial lens bearing part at the front end of the implanter body.

[0052] In the following description, unless otherwise specified, the installation positions of the components and the positional relationships between the components refer to the installation positions and positional relationships when the implanter 1 is in an initial state without performing a push operation.

[0053] <Implant>

[0054] In this embodiment, the intraocular lens implanter 1 (sometimes also referred to as the implanter 1) is a pre-installed intraocular lens implanter with an intraocular lens pre-installed. Figure 1 , 2 As shown, the intraocular lens implanter 1 comprises an implanter body 3, an implantation head 2 installed at the front end of the implanter body 3, and a spiral tube 4 installed at the rear end of the implanter body 3. An intraocular lens bearing portion 11 is provided at the front end of the implanter body 1, and an intraocular lens 5 is pre-set on the intraocular lens bearing portion 11. In addition, a push pin 9 is installed inside the implanter body 1, and the push pin 9 is located behind the intraocular lens 5, and a push rod 10 is installed inside the spiral tube 4. The front end of the push rod 10 is connected to the rear end of the push pin 9.

[0055] like Figure 2 As shown, the implanter body 3 is roughly cylindrical, and its front end is provided with a crystal bearing part 11 protruding forward from the bottom, and an artificial crystal 5 is pre-set on the crystal bearing part 11, and the artificial crystal 5 is placed on the lower bottom surface 11a of the crystal bearing part 11. The crystal bearing part 11 not only plays the role of bearing the artificial crystal, but also plays the role of restricting the movement of the artificial crystal in the up-down direction and the left-right direction (the specific implementation structure is disclosed in many prior arts, such as the patent literature recorded in the background technology, etc., and will not be described in detail in this specification).

[0056] In this embodiment, the artificial lens 5 is made of a hydrophobic soft material. Figure 7As shown, the intraocular lens 5 has an optical portion 6 that is roughly disc-shaped and a pair of support haptics, namely, an anterior support haptic 7a and a posterior support haptic 7b, disposed on the front and rear sides of the optical portion 6. The optical portion 6 has a lower surface (first optical surface) and an upper surface (second optical surface) that are opposite to each other. The anterior support haptic 7a extends forward from the right side of the optical portion 6 in an arm-like manner, and extends obliquely to the left while extending forward, and is roughly in the shape of the letter L, and has a base end portion 7a1 connected to the optical portion 6 and a front end portion 7a2 as an extension terminal and a free end, and a space is formed between the front end portion 7a2 and the front edge of the optical portion 6. Similar to the front supporting haptic 7a, the rear supporting haptic 7b extends backward from the left side of the optical portion 6 in an arm-like manner, and extends obliquely to the right while extending backward, and is roughly in the shape of the letter L. It has a base end portion 7b1 connected to the optical portion 6 and a rear end portion 7b2 as an extension end and a free end, and a space is formed between the rear end portion 7b2 and the rear edge of the optical portion 6.

[0057] When the artificial lens 5 is curled or folded as desired, the front support haptic 7a and the rear support haptic 7b are folded onto the upper surface of the optical portion 6 respectively, and the left and right edges of the optical portion 6 are rolled up to wrap the front support haptic 7a and the rear support haptic 7b.

[0058] An external thread 3a is provided on the outer peripheral surface of the rear section 12 of the implanter body 3, and the external thread 3a cooperates with the internal thread provided on the spiral tube 4, so that the spiral tube 4 can move relative to the implanter body 3 in the implanter axis direction (front and rear direction) when the spiral tube 4 is rotated.

[0059] like Figure 1 As shown, the spiral tube 4 is coaxially mounted on the rear end of the implanter body 3, and as mentioned above, is a component that can be rotated by the operator. A push rod 10 is mounted inside the spiral tube 4, and the rear end 10b of the push rod 10 is connected to the spiral tube 4 so that it can rotate relative to the spiral tube 4 but cannot move relative to the front and rear directions, and the front end 10a of the push rod 10 is connected to the rear end of the push pin 9.

[0060] The push pin 9 is installed inside the implanter body 3 so as to be relatively movable along the front-rear direction. As mentioned above, its rear end is connected to the front end 10a of the push rod 10. When the push rod 10 moves forward, the push pin 9 is pushed by the push rod 10 and moves forward.

[0061] like Figure 2 As shown, the implanter 1 further comprises a pressing piece 8, which is arranged on the implanter body 3 in a manner that it can move in the front-rear direction relative to the implanter body 3. The pressing piece 8 plays a role in pressing the intraocular lens 5 and the push needle 9 downward during the push injection action.

[0062] like Figure 2As shown, the implant head 2 has a nozzle portion 2a and a transition portion 2b, wherein the nozzle portion 2a is used to release the intraocular lens 5 into the human eye, and the transition portion 2b is located behind the nozzle portion 2a, and the shape and size of the inner cavity thereof are set so as to enable the intraocular lens 5 to be folded or curled, and in this state reach the nozzle portion 2a. In addition, the shape and size setting of the transition portion 2b that enables the intraocular lens 5 (optical portion 6) to be curled from bottom to top are widely disclosed in the prior art (e.g., the above-mentioned patent documents 1-3), and will not be further described in this specification.

[0063] When using the implanter 1 to implant the artificial lens 5 into the human eye, the operator rotates the spiral tube 4, thereby causing the spiral tube 4 to move forward along the axial direction (front-to-back direction) of the implanter 1, driving the push rod 10 to move, and then the push rod 10 drives the push pin 9 to move forward. The forward-moving push pin 9 pushes the artificial lens 5 pre-set on the artificial lens supporting part 11, pushes it into the implantation head 2, and injects it into the human eye through the implantation head 2.

[0064] In addition, if Figure 3 As shown, a pin hole 201 is provided on the implant head 2, specifically at the lower part of the transition part 2b, and the position of the pin hole 201 in the front-back direction is set to be approximately located between the front end of the front support haptic 7a of the artificial lens 5 on the lens bearing part 11 and the front edge of the optical part 6. The pin hole 201 is inserted with a stop pin 42 of a stop seat 40 described later.

[0065] In addition, if Figure 4 As shown, a perfusion port 202 is provided on the implant head 2, specifically, at the upper part of the transition portion 2b. The perfusion port 202 is formed by a through hole that penetrates the inside and outside of the implant head 2. Before the push injection operation is performed, the viscoelastic agent is perfused into the implant head 2 through the perfusion port 202. In addition, in this embodiment, the position of the perfusion port 202 in the front-to-back direction is set to be located in front of (front-upper side) the front end portion 7a2 of the front support haptic 7a of the artificial lens 5.

[0066] <Inner packaging>

[0067] During transportation and handling, and before surgery (injection of the intraocular lens), the implanter 1 is usually placed in the inner packaging 30 . Figure 5 3 shows the part of the inner package 30 that cooperates with the implantation head 2 of the implanter 1. As for its more specific structure, for example, it is disclosed in detail in CN104127264A, so it will not be described in more detail here.

[0068] <Limited Seat>

[0069] like Figure 5As shown, a stopper 40 is installed on the inner package 30. The pre-installed intraocular lens implantation device described in the present invention includes the inner package 30, the stopper 40, the intraocular lens implanter 1 and the intraocular lens 5 pre-installed in the intraocular lens implanter 1. In this embodiment, the stopper 40 and the inner package 30 are manufactured by different methods, that is, the stopper 40 is formed by injection molding and is an injection molded part, and the inner package 30 is formed by blister molding and is a blister molded part. In this way, compared with the method of integrally forming the stopper 40 on the inner package 30, the stopper 40 with a more complex shape can be easily formed.

[0070] Combination Figure 4 , Figure 6 The limit seat 40 has a support seat 41 and a limit pin 42. The support seat 41 constitutes a substantially square base portion, which is snap-fitted and installed on the inner package 30. The limit pin 42 is uprightly arranged on the upper surface of the support seat 41, and the support seat 41 and the limit pin 42 are formed integrally.

[0071] Reference Figure 4 , Figure 6 When the implanter 1 is mounted on the inner package 30, the stop pin 42 of the stop seat 40 is inserted into the implant head 2 through the pin hole 201 on the implant head 2, and is located in the space between the front end 7a2 (free end) of the front support haptic 7a of the intraocular lens 5 and the front edge of the optical part 6. Thus, the stop pin 42 can block the optical part 6 and thus block the forward movement of the intraocular lens 5, thereby limiting it.

[0072] like Figure 4-6 As shown, the rear surface 42a of the limit pin 42 facing the optical part 6 of the artificial lens 5 is composed of a vertical surface that is straight when viewed in the left-right direction, which serves as a stop surface for blocking the optical part 6 from moving forward; in addition, the front surface of the limit pin 42 is composed of a vertical surface 42c located on the lower side and a guide surface 42b located on the upper side, the vertical surface 42c is straight when viewed in the left-right direction, and the guide surface 42b is formed at least in the portion of the front surface of the limit pin 42 whose height is above the lower bottom surface 11a of the artificial lens bearing part 11, and in the present embodiment, is composed of a straight inclined surface extending obliquely backward and upward.

[0073] In addition, when observed in the left and right directions, the width of the limit pin 42 (specifically the maximum width part of the limit pin 42 in the front-to-back direction) in the front-to-back direction is set to be basically the same as the distance between the front end portion 7a2 (free end portion) of the front support haptic 7a of the optical part 6 and the front edge of the optical part 6, thereby better limiting the front support haptic 7a of the artificial lens in an ideal state.

[0074] Regarding the specific configuration of the guide surface 42b, in this embodiment, it is composed of a straight inclined surface. Figure 4-Figure 6 As shown, the inclined surface for constituting the guide surface 42b is formed from front to back on the partial length of the front-to-back direction of the stop pin 42. However, it is not limited to this, and the inclined surface for constituting the guide surface 42b can also be formed from front to back on the entire length of the front-to-back direction of the stop pin 42.

[0075] <Effects of the present embodiment>

[0076] The effects of this embodiment are explained below in conjunction with the assembly and use methods of the preassembled intraocular lens implant device.

[0077] When using the preassembled intraocular lens implantation device of this embodiment, the limit seat 40 is first assembled on the inner packaging 30 during assembly, and then the preassembled intraocular lens implanter 1 is assembled on the inner packaging 30. The limit pin 42 of the limit seat 40 is just inserted into the pin hole 201 below the implantation head 2 of the assembled implanter 1, so that the limit pin 42 of the limit seat 40 is located in the space between the front edge of the optical part 6 of the intraocular lens 5 covered in the implanter 1 and the front end part 7a2 of the front support loop 7a, so that the rear surface 42a of the limit pin 42 serves to limit the movement of the intraocular lens 5 toward the nozzle 2a of the implantation head 2.

[0078] When performing the intraocular lens implantation, the viscoelastic agent is firstly injected through the injection port 202 on the implantation head 2, and then the pre-assembled intraocular lens implanter 1 is vertically removed from the inner package 30, and the injection component 9 of the implanter 1 is operated to complete the lens injection. Because the injection port 202 of the viscoelastic agent is located in front of the front support haptic 7a of the intraocular lens 5, the injected viscoelastic agent flow will most likely push the front support haptic 7a back and fold it to contact the front surface of the stop pin 42, because the height of the front surface of the stop pin 42 is an inclined surface (guide surface 42b) extending obliquely backward and upward at the lower bottom surface 11a of the intraocular lens bearing part 11, so the front support haptic 7a of the intraocular lens 5 will slide upward along this inclined surface, so that the front support haptic 7a is higher than the upper surface of the optical part 6 of the intraocular lens 5. In this state, when the implanter 1 is removed from the inner packaging 30, since the injected viscoelastic agent has filled the inner cavity of the implant head 2, the front support haptic 7a will maintain its state under the resistance of the viscoelastic agent, thereby ensuring the reliability of the subsequent front support haptic 7a being folded onto the upper surface of the optical part 6 under the combined action of the pushing component 9 pushing the optical part 6 forward and the side surface of the transition part 2b of the implant head 2.

[0079] To sum up, by adopting the present embodiment, the limit seat 40 simultaneously serves to limit the artificial lens 5 and to improve the reliability of the folding action of the front supporting haptic 7a. The structural design is simple and does not require additional operation. The whole set of equipment is applicable to a wide range of viscoelastic viscosities. If the viscosity of the viscoelastic is low, the front supporting haptic 7a will not be affected by the injected viscoelastic, and the action of pushing and folding the front supporting haptic 7a will be realized according to the normal theoretical design state. If the viscosity of the viscoelastic is high, the front supporting haptic 7a will be affected by the injected viscoelastic, but the guiding surface 42b on the front surface of the limit pin 42 of the limit seat 40 can ensure that the front supporting haptic 7a moves upward to a position higher than the upper surface of the optical part 6 of the artificial lens 5, thereby improving the reliability of the folding action of the front supporting haptic 7a of the artificial lens 5.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0081] For example, in the above embodiment, the guide surface 42b is composed of a straight inclined surface, however, the present invention is not limited to this, and it can also be composed of a concave or convex curved surface, or any combination of a straight inclined surface, a concave curved surface, and a convex curved surface (for example, a combination of multiple straight inclined surfaces, a straight inclined surface and a concave curved surface, etc.), as long as it extends obliquely backward and upward and can guide the front support loop 7a to produce an upward displacement.

[0082] In addition, in the above embodiment, a guide surface for guiding the front support haptic 7a to lift backward is formed on the stop pin 42, however, the present invention is not limited thereto, and a detachable front support haptic guide component can be installed at a position between the front support haptic 7a and the optical part 6 on the implanter 1 independently of the stop pin 42, and a guide surface consisting of an inclined surface is formed on the front surface of the front support haptic guide component. In addition, the specific structure of the front support haptic guide component is not limited to the above embodiment, as long as it can guide the front support haptic to move backward when it is impacted by the viscoelastic agent, for example, and can produce an upward displacement.

[0083] In the above embodiment, the limit seat 40 (and the limit pin 42) are installed on the inner package 30 through the support seat 41. However, the present invention is not limited to this. It can also be constructed as a limit seat that has no installation relationship with the inner package 30. After the intraocular lens implanter 1 is removed from the inner package 30, the limit seat (and the limit pin thereon) is removed from the intraocular lens implanter 1 through another operation.

[0084] In the above embodiment, the limit seat 40 (and the limit pin 42) are arranged at the bottom of the intraocular lens implanter 1, and the limit pin 42 is inserted into the interior of the intraocular lens implanter 1 through the pin hole from bottom to top and is located between the front support loop 7a and the optical part 6. However, the present invention is not limited to this. The limit seat 40 and the limit pin 42 can also be arranged at the top of the intraocular lens implanter 1, and the pin hole is also provided at the top of the intraocular lens implanter 1. Then the limit pin 42 is inserted into the interior of the intraocular lens implanter 1 through the pin hole from top to bottom and is located between the front support loop 7a and the optical part 6.

Claims

1. A pre-assembled intraocular lens implantation device, comprising an intraocular lens (5) and an intraocular lens implanter (1), The artificial lens (5) is pre-installed inside the artificial lens implanter (1), and comprises an optical portion (6) and an anterior support haptic (7a) arranged on the anterior side of the optical portion (6). Before performing the implantation operation of the artificial lens (5), a viscoelastic agent is poured into the interior of the artificial lens implanter (1). It is characterized in that On the intraocular lens implanter (1), a detachable front support haptic guide component is arranged at a position between the optical part (6) and the front support haptic (7a), and a guide surface is formed on the front surface of the front support haptic guide component, and the guide surface is composed of an inclined surface extending obliquely backward and upward. When the front support haptic (7a) is pushed backward and moved by the viscoelastic flow generated by the injection of the viscoelastic agent, the guide surface can guide it to produce an upward displacement.

2. The preassembled intraocular lens implant device according to claim 1, It is characterized in that The intraocular lens implanter (1) has a pushing component that can move forward and backward, and the pushing component can push the intraocular lens (5) when moving forward.

3. The preassembled intraocular lens implant device according to claim 2, It is characterized in that It also includes a limit seat (40), The intraocular lens implanter (1) is provided with a pin hole (201), the pin hole (201) being located between the optical portion (6) of the intraocular lens (5) and the front end portion (7a2) of the front support haptic (7a) in the front-back direction. The limiting seat (40) has a limiting pin (42), which is inserted into the intraocular lens implanter (1) through the pin hole and is located between the optical portion (6) of the intraocular lens (5) and the front end portion (7a2) of the front support haptic (7a) to limit the intraocular lens (5) from moving forward. The front support loop guiding component is the limiting pin (42).

4. The preassembled intraocular lens implant device according to claim 3, It is characterized in that The guide surface is formed on the front surface of the limiting pin (42) facing the front supporting loop (7a).

5. The preassembled intraocular lens implantation device according to any one of claims 2 to 4, It is characterized in that The intraocular lens implanter (1) is provided with an injection port (202) for injecting viscoelastic agent into the interior thereof, and the injection port (202) is located in front of the front end portion (7a2) of the front support haptic (7a) in the front-to-back direction.

6. The preassembled intraocular lens implant device according to claim 4, It is characterized in that The guide surface is a straight surface that is straight when viewed in the left-right direction, or a convex or concave curved surface, or any combination of the foregoing.

7. The preassembled intraocular lens implantation device according to claim 3 or 4, It is characterized in that The rear surface (42a) of the stop pin (42) facing the optical part (6) of the artificial lens (5) is composed of a vertical surface that is vertical when viewed from the left and right directions.

8. The preassembled intraocular lens implantation device according to claim 3 or 4, It is characterized in that It also includes an inner packaging member (30) for packaging the intraocular lens implanter. The limiting seat (40) also has a supporting seat (41), the limiting pin (42) is integrally formed on the supporting seat (41), and the supporting seat (41) is installed on the inner packaging component (30).

9. The preassembled intraocular lens implant device according to claim 8, It is characterized in that The inner packaging part (30) is a blister part, and the limiting seat (40) is an injection molded part.

10. The preassembled intraocular lens implantation device according to claim 3 or 4, It is characterized in that When viewed in the left-right direction, the width of the limit pin (42) in the front-back direction is set to be the same as the distance between the front end portion (7a2) of the front support haptic (7a) and the front edge of the optical portion (6).

11. The preassembled intraocular lens implant device according to claim 3, It is characterized in that The intraocular lens implanter (1) comprises: An implanter body (3) having an artificial lens bearing portion (11), wherein the artificial lens (5) is arranged on the artificial lens bearing portion (11); An implantation head (2) is used to implant the artificial lens (5) into a human eye, and the implantation head causes the artificial lens (5) to deform when the artificial lens (5) passes through its inner cavity. The pin hole (201) is formed at the lower part of the implant head (2).

12. The preassembled intraocular lens implant device according to claim 4, It is characterized in that The intraocular lens implanter (1) comprises: An implanter body (3) having an artificial lens bearing portion (11), wherein the artificial lens (5) is arranged on the artificial lens bearing portion (11); An implantation head (2) is used to implant the artificial lens (5) into a human eye, and the implantation head causes the artificial lens (5) to deform when the artificial lens (5) passes through its inner cavity. The pin hole (201) is formed at the lower part of the implant head (2).

13. The preassembled intraocular lens implant device according to claim 12, It is characterized in that In the up-down direction, the guide surface is formed at least at a portion of the front surface of the stop pin (42) whose height is above the lower bottom surface (11a) of the artificial lens bearing part (11).

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