Intraocular lens insertion apparatus

Abstract

The purpose of the technology disclosed in this case is to provide an intraocular lens insertion device that allows for easy confirmation of the folded state of an intraocular lens. The intraocular lens insertion device for inserting an intraocular lens through an incision formed in the eye comprises: a device body having a receiving portion and an insertion tube portion, the receiving portion receiving the intraocular lens, the insertion tube portion being disposed further distally than the receiving portion, communicating with the receiving portion, and inserted into the incision; and a push-out member that moves the intraocular lens placed in the receiving portion distally. The device body has a standby state mark, which serves as a reference for the normal position of the push-out member when the intraocular lens is in a lens standby position between the receiving portion and the insertion tube portion.

Description

Technical Field

[0001] This invention relates to an intraocular lens insertion device for inserting an intraocular lens into the eye. Background Technology

[0002] In cataract treatment, intraocular lenses, inserted as replacements for the cloudy lens to correct refractive errors, are already in practical use. In intraocular lens insertion surgery, for example, a few millimeters of incision is made at the edge of the cornea, sclera, etc., and the lens is pulverized and removed through the incision using techniques such as phacoemulsification and aspiration. Then, an intraocular lens is inserted through the incision using an intraocular lens insertion instrument.

[0003] An intraocular lens is inserted into the eye through an incision using an intraocular lens insertion device. Patent Document 1 describes an intraocular lens insertion device.

[0004] Prior art literature Patent documents Patent document 1: International Publication No. 2020 / 054641. Summary of the Invention

[0005] The problem that the invention aims to solve When the intraocular lens is pushed out by the intraocular lens insertion device, the following actions are generally performed: after temporarily moving the intraocular lens to the lens standby position, the folding state of the intraocular lens is confirmed.

[0006] The purpose of the technology disclosed in this case is to provide an intraocular lens insertion device that allows for easy confirmation of the folding state of the intraocular lens.

[0007] Solution for solving the problem The intraocular lens insertion device disclosed in this case is an intraocular lens insertion device for inserting an intraocular lens through an incision formed in the eye. It comprises: a main body having a receiving portion and an insertion tube portion, the receiving portion receiving the intraocular lens, the insertion tube portion being disposed further distally than the receiving portion and communicating with the receiving portion, and being inserted into the incision; and an ejection member that moves the intraocular lens, placed in the receiving portion, toward the distal end. The main body has a standby state mark, which serves as a reference for the normal position of the ejection member when the intraocular lens is in a lens standby position between the receiving portion and the insertion tube portion. By using the standby state mark as a reference for confirming the normal position of the ejection member, the intraocular lens insertion device can easily determine the folded state of the intraocular lens.

[0008] In the aforementioned intraocular lens insertion device, the aforementioned standby state mark may include: an end position indicator, which serves as a reference for the normal end position of the aforementioned ejection member when the aforementioned intraocular lens is in the aforementioned lens standby position; and an ejection direction indicator, which serves as a reference for the normal position in the left-right direction that is orthogonal to the ejection direction and parallel to the bottom surface of the aforementioned storage portion.

[0009] In the aforementioned intraocular lens insertion device, the aforementioned end position display is formed as a line extending in the aforementioned left-right direction, the aforementioned ejection direction display is formed as a pair of lines extending in the aforementioned ejection direction, and the aforementioned standby state mark is formed in a shape where the aforementioned end position display and the aforementioned ejection direction display are connected.

[0010] In the aforementioned intraocular lens insertion device, the aforementioned standby status mark may be integrally formed from a translucent material and the main body of the device, and the end of the aforementioned ejection component may be given a different color than the aforementioned standby status mark.

[0011] The effects of the invention Based on the technology disclosed in this case, it is easy to confirm that the extension component is in the normal position when the lens is in the standby position, and it is easy to confirm the folding state of the intraocular lens. Attached Figure Description

[0012] Figure 1 This is a perspective view of the intraocular lens insertion device according to the embodiment.

[0013] Figure 2 (a) is a top view of the nozzle body of the intraocular lens insertion device according to the embodiment, viewed from above. Figure 2 (b) is a left-side view of the nozzle body of the intraocular lens insertion device according to the embodiment, viewed from the left side.

[0014] Figure 3 (a) is a top view of the plunger of the intraocular lens insertion device according to the embodiment, viewed from above. Figure 3 (b) is a left-side view of the plunger of the intraocular lens insertion device according to the embodiment, viewed from the left side.

[0015] Figure 4 (a) is a top view of the intraocular lens from the optical axis side. Figure 4 (b) is a side view of the intraocular lens from the side.

[0016] Figure 5 This is a top view of the holding member of the intraocular lens insertion device according to the embodiment, viewed from above.

[0017] Figure 6(a) is a perspective view of the holding member of the intraocular lens insertion device according to the embodiment, viewed from an obliquely upward angle. Figure 6 (b) is in Figure 6 (a) is a cross-sectional view of the part cut off along line AA.

[0018] Figure 7 This is a perspective view showing an enlarged view of the platform of the intraocular lens insertion device according to the embodiment.

[0019] Figure 8 This is a top view of the nozzle body showing an intraocular lens mounted on the platform of the intraocular lens insertion device according to the embodiment.

[0020] Figure 9 This is a perspective view showing an enlarged view of the end side of the plunger of the intraocular lens insertion device according to the embodiment. Detailed Implementation

[0021] The intraocular lens insertion device according to the embodiments disclosed in this application will be described below with reference to the accompanying drawings. Furthermore, the configurations of the following embodiments are illustrative, and the present invention is not limited to these configurations.

[0022] Figure 1 This is a perspective view of the intraocular lens insertion device 1 according to this embodiment, viewed from an obliquely upward perspective. The intraocular lens insertion device 1 includes a nozzle body 10 (an example of an "device body") and a plunger 30 (an example of an "ejection member") inserted into the nozzle body 10. The nozzle body 10 has a cylindrical shape with a generally rectangular cross-section, a rear end portion 10d with an open end face at one end, and a nozzle portion 15 that tapers towards the end at the other end; and an end portion 10a (an example of an "insertion tube portion") with an opening 10b formed at the end.

[0023] In the following description, the direction from the rear end 10d of the nozzle body 10 toward the end portion 10a is referred to as "front," and the opposite direction is referred to as "rear." Figure 1 In the diagram, the upper side of the paper is designated as "up," and the opposite direction is designated as "down." Facing forward, the left side is designated as "left," and the opposite direction is designated as "right." Furthermore, the upper side corresponds to the front side of the optical axis of the lens body 2a (described later), the lower side corresponds to the rear side of the optical axis of the lens body 2a, and the front side corresponds to the ejection direction based on the plunger 30.

[0024] The distal end portion 10a, located at the front end of the nozzle body 10, is internally connected to the nozzle portion 15 and has a cylindrical shape with a smaller diameter than the nozzle portion 15. Near the rear end portion 10d of the nozzle body 10, a grip portion 11 is integrally provided with the nozzle body 10. The grip portion 11 protrudes vertically in a plate shape, allowing the surgeon to hold their fingers when pushing the plunger 30 towards the distal end of the nozzle body 10. Additionally, the nozzle body 10 has a platform portion 12, located behind the nozzle portion 15, which houses the intraocular lens 2. The nozzle portion 15 and the distal end portion 10a are positioned further distal than the platform portion 12 and are connected to it. The platform portion 12 is connected to a platform cover portion 13, which allows its upper side to open and close freely, via a connecting portion 14. The platform portion 12 and the closed platform cover portion 13 form a storage portion that houses the intraocular lens 2. The bottom surface of the storage portion is the platform portion 12, and the top surface of the storage portion is the platform cover portion 13. Furthermore, by opening the stage cover 13, the space for storing the intraocular lens can be opened. Additionally, a retaining member 50 is installed on the stage 12 from the lower side of the nozzle body 10. This retaining member 50 ensures that the intraocular lens 2 is stably held within the stage 12 even before use (during transport).

[0025] Furthermore, a confirmation window 17 is formed on a portion of the stage cover portion 13. The confirmation window 17, by having a wall thinner than its surroundings, allows for visual identification of the inner side of the stage cover portion 13. Moreover, the degree to which the wall of the confirmation window 17 is thinner than its surroundings can be appropriately determined based on the forming material of the stage cover portion 13 and the visual identification of the intraocular lens from the confirmation window 17. Additionally, by forming the confirmation window 17, it is also expected to reduce molding defects during the molding of the stage cover portion 13.

[0026] The intraocular lens insertion device 1 according to this embodiment is a pre-positioned type in which the intraocular lens is pre-installed in the stage 12 at the time of shipment. In the pre-positioned type of intraocular lens insertion device 1, during manufacturing, with the stage cover 13 open and the holding component 50 installed in the stage 12, the intraocular lens is placed on the stage 12 with the front side of the optical axis facing upwards. Then, the intraocular lens insertion device 1 is shipped after the stage cover 13 is closed.

[0027] Additionally, an injection port 18 is provided in the stage cover portion 13. The injection port 18 is used to inject a viscoelastic material into the stage portion 12 before moving the intraocular lens forward. The viscoelastic material acts as a lubricant to reduce friction generated during the movement of the intraocular lens. The injection port 18 is a hole that connects the interior and exterior of the storage portion when the stage cover portion 13 is closed. The surgeon, assistant, or nurse (hereinafter, sometimes referred to as "the surgeon, etc.") can use a syringe to inject the viscoelastic material into the stage portion 12 through the injection port 18.

[0028] Additionally, a guide wall 19 is provided on the stage cover 13 to guide the injection needle to the injection port 18 for injecting a viscoelastic substance. The guide wall 19 is provided on the stage cover 13 in such a way that it surrounds the injection port 18 from the left side of the opening end, through the front side of the opening end, and continuously to the right side of the opening end. The surgeon places the injection needle of the syringe used to inject the viscoelastic substance against the guide wall 19, thereby moving the end of the injection needle into the injection port 18. In this way, the guide wall 19 can guide the injection needle used to inject the viscoelastic substance into the injection port 18. Then, after the surgeon keeps the stage cover 13 closed and moistens the intraocular lens with the viscoelastic substance, the holding member 50 is removed. Next, the surgeon pushes the plunger 30 toward the end side of the nozzle body 10. The end portion 10a communicates with the stage portion 12 via the nozzle portion 15, and the intraocular lens pressed by the plunger 30 can move within the end portion 10a through the nozzle portion 15. With the distal end 10a of the intraocular lens inserter 1 inserted into the incision formed in the eye, the intraocular lens is released from the opening 10b into the eye by pressing the plunger 30. Thus, the intraocular lens inserter 1 can insert the intraocular lens into the eye through the incision.

[0029] The plunger 30 is inserted into the nozzle body 10 from the rear end 10d and can move back and forth. The intraocular lens insertion device 1 releases the intraocular lens into the eye through the opening 10b via the nozzle part 15 and the end part 10a by moving the plunger 30 forward.

[0030] The nozzle body 10, plunger 30, and retaining component 50 of the intraocular lens insertion device 1 are formed of resins such as polypropylene. Polypropylene is a raw material with proven performance as a material for medical devices, and it is also highly reliable due to its drug resistance.

[0031] Figure 2 (a) and (b) are diagrams showing the nozzle body 10 being pulled out of the intraocular lens insertion device 1. Figure 2 (a) is a top view of the nozzle body 10 as seen from above. Figure 2 (b) is a left-side view of the nozzle body 10 as seen from the left side. Furthermore, Figure 2 (a) shows the platform cover 13 in the open state. Figure 2 (b) shows the closed state of the platform cover 13.

[0032] Inside the nozzle body 10, there are a through hole 10c on the front side and a through hole 10g on the rear side, the cross-sectional shape of which changes accordingly to the shape of the nozzle body 10. The through hole 10c is located further forward than the stage 12, and the through hole 10g is located further rearward than the stage 12. The through hole 10c is a hole that forms the movement path of the intraocular lens 2 when it is pressed and moved by the plunger 30, and the through hole 10g is a hole through which the plunger 30 is inserted. The intraocular lens 2 is folded while passing through the through hole 10c and is released into the patient's eyeball from the opening 10b of the distal end 10a. Furthermore, the intraocular lens is folded into a concave shape when viewed from above. In addition, the opening end of the opening 10b is formed obliquely relative to the extending direction of the distal end 10a. Specifically, as Figure 2 As shown in (b), the opening 10b is formed such that the opening end is inclined upward from the rear side toward the front side.

[0033] In the stage 12, a stage groove 12a is formed, and the stage groove 12a has a lens body larger than that of an intraocular lens ( Figure 4 The lens body 2a) shown in (a) and (b) has a width slightly larger than its diameter. The front-to-back dimension of the stage groove 12a is set to be larger than the maximum width of the intraocular lens 2, including the support portions 2b and 2c extending forward and backward. Furthermore, the stage portion 12 houses the intraocular lens within a space formed by the following: the bottom portion 12b of the stage groove 12a; and the top portion 13a, which, when the stage cover portion 13 is closed, is located inside the housing portion. When the stage cover portion 13 is closed, the bottom portion 12b and the top portion 13a form a space for housing the intraocular lens. Furthermore, as... Figure 2 As shown in (b), the vertical position of the bottom part 12b is set higher than the height of the bottom surface of the through hole 10g of the nozzle body 10, and the bottom part 12b and the bottom surface of the through hole 10g are connected by the bottom slope 10e.

[0034] The platform portion 12 and the platform cover portion 13 are integrally formed. The platform cover portion 13 has the same front-to-back dimension as the platform portion 12. The platform cover portion 13 is connected by a thin plate-like connecting portion 14 extending outward from the right side of the platform portion 12. The connecting portion 14 is formed in a way that allows it to bend at its center, and the platform cover portion 13 can be opened and closed with the center of the connecting portion 14 as the center by bending the connecting portion 14. The platform cover portion 13 can be in a closed state, overlapping the platform portion 12 from the top and separating the platform portion 12 from the outside.

[0035] A rib 13b is formed on the top surface 13a of the stage cover 13. The rib 13b is used to reinforce the stage cover 13 and stabilize the position of the intraocular lens. In addition, a guide groove 13c is formed on the top surface 13a of the stage cover 13. The guide groove 13c is formed in the center of the rib 13b and extends back and forth to guide the reciprocating movement of the plunger 30. An upper positioning part 13d is also formed on the top surface 13a. The upper positioning part 13d has a columnar shape protruding from the top surface 13a. Together with a pair of second positioning parts 67 of the retaining member 50 described later, it fixes the lens body 2a and the rear support part 2c of the intraocular lens 2.

[0036] In addition, such as Figure 2 As shown in (a), a locking hole 10f is formed on the upper surface side of the nozzle body 10, and the locking hole 10f can engage with the claw portion 32a of the plunger 30 described later.

[0037] Figure 3 (a) and (b) are diagrams showing the plunger 30 being pulled out of the intraocular lens insertion device 1. Figure 3 (a) is a top view of the plunger 30 from above. Figure 3 (b) is a left-side view of the plunger 30 viewed from the left. By moving the plunger 30 forward, the intraocular lens 2 housed in the stage 12 can be moved towards the distal end 10a. The plunger 30 has a length slightly longer than the nozzle body 10 in the front-rear direction. Furthermore, the plunger 30 has: a front actuating portion 31 that presses the intraocular lens 2; and a rear insertion through-hole 32, which has a rectangular rod shape. The actuating portion 31 has: a cylindrical portion 31a extending in the front-rear direction; and a flat, plate-like portion 31b extending in the left-right direction along the cylindrical portion 31a. Details of the actuating portion 31 will be described later. Additionally, at the rear end of the insertion through-hole 32, a circular, plate-like pressing plate portion 33 extending in the up-down and left-right directions is formed.

[0038] A claw portion 32a is formed in the portion of the insertion through-hole 32 further forward than the center in the front-rear direction. The claw portion 32a protrudes towards the upper side of the insertion through-hole 32 and can deform up and down due to the elasticity of the raw material of the plunger 30. When the plunger 30 is inserted into the nozzle body 10, the claw portion 32a engages with the locking hole 10f provided on the upper surface of the nozzle body 10 (see reference). Figure 2 (a) Engagement, which determines the relative position of the nozzle body 10 and the plunger 30 in the initial state. Furthermore, the claw portion 32a and the locking hole 10f are formed in the following positions: when the claw portion 32a and the locking hole 10f are engaged, the end of the actuating part 31 is located behind the lens body 2a of the intraocular lens 2 placed on the stage portion 12, and the end of the actuating part 31 can support the support portion 2c behind the lens body 2a.

[0039] Figure 4 (a) and (b) are diagrams showing the schematic configuration of an intraocular lens 2 inserted into the eye using the intraocular lens insertion device 1 according to this embodiment. Figure 4 (a) is a top view of the intraocular lens 2 as seen from the optical axis side. Figure 4 (b) is a side view of the intraocular lens 2. The intraocular lens 2 includes: a lens body 2a (an example of an "optical part") having a predetermined refractive power; and an anterior support portion 2b and a posterior support portion 2c connected to the lens body 2a. The intraocular lens 2 is mounted on the stage 12 of the nozzle body 10 in such a manner that the anterior support portion 2b is located on the anterior side of the intraocular lens insertion device 1, and the posterior support portion 2c is located on the posterior side of the intraocular lens insertion device 1. The anterior support portion 2b and the posterior support portion 2c are provided to hold the lens body 2a within the eyeball, and each support portion 2b, 2c has an elongated flat plate shape. The anterior support portion 2b and the posterior support portion 2c are connected to the lens body 2a via a joint portion 2d. In this embodiment, the intraocular lens 2 is a so-called one-piece type in which the lens body 2a, the anterior support portion 2b, the posterior support portion 2c, and the joint portion 2d are integrally formed from the same material. The intraocular lens 2 is formed, for example, from a flexible resin material. In addition, the intraocular lens 2 can also be a three-piece type consisting of the lens body 2a and the front and rear support parts 2b and 2c made of different materials.

[0040] Furthermore, the front support portion 2b and the rear support portion 2c are roughened. As a result, when the intraocular lens 2 is folded within the through hole 10c of the nozzle body 10, the support portions 2b and 2c are prevented from sticking to the lens body 2a.

[0041] Figures 5 to 6 (b) is a diagram showing the retaining member 50 that can be mounted and dismounted on the lower side of the platform 12. Figure 5 This is a top view of the retaining component 50. Figure 6 (a) is a perspective view of the retaining component 50 viewed from an obliquely upward angle. Figure 6 (b) is in Figure 6 (a) is a cross-sectional view taken from the front when the retaining component 50 is cut off along line AA. The retaining component 50 is formed separately from the nozzle body 10 so that it can be removed from the nozzle body 10.

[0042] The retaining member 50 has a base 51 disposed in the center and a pair of gripping portions 52 disposed on the left and right sides of the base 51. The base 51 and the gripping portions 52 are connected by a connecting portion 53. The connecting portion 53 provides a gap 54 between the base 51 and the pair of gripping portions 52, connecting the base 51 and the pair of gripping portions 52. In addition, the retaining member 50 has a pair of left and right sidewall portions 55 disposed on the left and right sides of the base 51 and extending in the front-rear direction. In addition, each of the pair of gripping portions 52 has an outer wall portion 52a formed, which has a height on the upper side so that the retaining member 50 is embedded in the left and right outer walls of the platform portion 12 and extends in the front-rear direction. On the base 51, a first mounting portion 56 and a second mounting portion 66 protruding upward are formed. The first mounting portion 56 and the second mounting portion 66 are an example of a pair of lens fixing portions having a columnar shape. Furthermore, on the side of the upper end face of the first mounting portion 56 away from the optical axis of the lens body 2a, a first positioning portion 57 is formed protruding upwards beyond the upper end face of the first mounting portion 56. Additionally, on the upper end face of the second mounting portion 66, a pair of second positioning portions 67 are formed protruding upwards beyond the upper end face of the second mounting portion 66. These pair of second positioning portions 67 position the lens body 2a and the rear support portion 2c of the intraocular lens 2. The first positioning portion 57 is located on the right and front side of the lens body 2a, and the second positioning portion 67 is located on the left and rear side of the lens body 2a. The distance between the first positioning portion 57 and the second positioning portion 67 is set to be slightly larger than the diameter of the lens body 2a of the intraocular lens 2. A pair of second positioning portions 67 are arranged with a spacing slightly larger than the width of the rear support portion 2c. By placing the rear support portion 2c on the side of the joint portion 2d between the pair of second positioning portions 67, the rear support portion 2c is clamped by the pair of second positioning portions 67, thereby positioning the lens body 2a and the rear support portion 2c relative to the holding member 50.

[0043] Additionally, a pair of third mounting portions 58 protruding upwards are formed at the base 51. The pair of third mounting portions 58 are respectively disposed on the front and left sides and the rear and right sides of the lens body 2a. On the side of the upper end face of the pair of third mounting portions 58 away from the optical axis of the lens body 2a, a pair of third positioning portions 59 protruding further upwards towards the third mounting portions 58 are formed. The pair of third mounting portions 58 and the pair of third positioning portions 59 are an example of a pair of lens fixing portions having a columnar shape. The distance between the pair of third positioning portions 59 is set to be slightly larger than the diameter of the lens body 2a of the intraocular lens 2.

[0044] Additionally, the retaining member 50 has a tubular protrusion 61, which is provided when the nozzle body 10 is mounted on it. Figure 1The injection hole 18 shown extends toward the top portion 13a from its opposite position and opens at its rear (base end). The tubular protrusion 61 serves as a flow path to guide the viscoelastic material injected from the injection hole 18.

[0045] Additionally, the retaining member 50 has a pair of claw portions 62 extending inward in the left-right direction from each of the pair of third mounting portions 58. The claw portions 62 are provided to fix the retaining member 50 to the platform portion 12 by engaging with it.

[0046] Next, refer to Figure 2 (a) and use at the same time Figure 7 The installation and removal of the retaining component 50 relative to the platform 12 will be explained. Figure 7 This is a perspective view showing an enlarged view of the platform 12 of the nozzle body 10. (See image below.) Figure 2 As shown in (a), four through holes 12c and one through hole 12d are formed on the bottom part 12b of the platform 12, extending vertically through the bottom part 12b. The four through holes 12c are formed at positions corresponding to the first to third mounting portions and the first to third positioning portions, allowing the first to third mounting portions and the first to third positioning portions to be inserted through them. The through hole 12d is formed at a position corresponding to the tubular protrusion 61, allowing the tubular protrusion 61 to be inserted through it. The shape of the through hole 12c is approximately similar to the shape of the first to third mounting portions and the first to third positioning portions of the retaining member 50 when viewed from above. The shape of the through hole 12d is approximately the same size and shape as the tubular protrusion 61 of the retaining member 50 when viewed from above. Furthermore, as... Figure 7 As shown, when the retaining member 50 is installed on the nozzle body 10, the first to third mounting parts and the first to third positioning parts are inserted from the lower side of the bottom part 12b into the through hole 12c, and the tubular protrusion 61 is inserted from the lower side of the bottom part 12b into the through hole 12d. The first to third mounting parts, the first to third positioning parts, and the tubular protrusion 61 protrude towards the upper side of the bottom part 12b.

[0047] The retaining member 50 is fixed to the stage 12 by engaging the claw portion 62 provided on the third mounting portion 58 with the bottom portion 12b. Before moving the intraocular lens 2 using the plunger 30, the retaining member 50 is removed from the stage 12. At this time, the surgeon operates to bring the pair of gripping portions 52 closer together in the left-right direction. The pair of gripping portions 52 are connected to the base 51 via the connecting portion 53. The surgeon uses their fingers to pinch the pair of gripping portions 52 and moves them in the left-right direction, thereby opening the pair of claw portions 62 outward in the left-right direction and releasing the engagement between the pair of claw portions 62 and the bottom portion 12b. In this way, the retaining member 50 is configured to be detachable from the stage 12.

[0048] Figure 8This is a top view showing the nozzle body 10 with the intraocular lens 2 mounted on the stage 12. Figure 8 The image shows the retaining member 50 mounted on the stage 12. With the intraocular lens 2 mounted on the stage 12, the bottom surface of the outer periphery of the lens body 2a rests on the upper surfaces of the first mounting portion 56, the second mounting portion 66, and a pair of third mounting portions 58. Furthermore, regarding the lens body 2a, its edge is fixed relative to the front-back and left-right directions by the first positioning portion 57, the second positioning portion 67, and a pair of third positioning portions 59. Furthermore, the anterior support portion 2b of the intraocular lens 2 is mounted on the fourth mounting portion 12e (described later), and the rear support portion 2c of the intraocular lens 2 is fixed by a pair of second positioning portions 67. The rear support portion 2c is then locked by the locking portion of the actuating portion 31 of the plunger 30. The configuration for locking the rear support portion 2c will be described later.

[0049] The device is configured such that when the retaining member 50 is removed from the stage 12, as described above, the surgeon or similar personnel operate to bring the pair of gripping parts 52 closer together in the left-right direction. This causes the first positioning part 57, the second positioning part 67, and the pair of third positioning parts 59 that fix the lens body 2a to open outwards in the left-right direction, thereby releasing the fixation of the lens body 2a. Therefore, the intraocular lens insertion device 1 can release the fixation of the intraocular lens 2 by the retaining member 50 without applying excessive impact to the intraocular lens 2. Furthermore, the intraocular lens insertion device 1 allows for easy removal of the retaining member 50 from the stage 12.

[0050] Next, refer to Figure 7 and Figure 8 The markings on the plunger 30 when the intraocular lens 2 is in the lens standby position will be explained. When using the intraocular lens inserter 1 during surgery, the surgeon's assistant or nurse moves the plunger 30 forward, and then hands the intraocular lens inserter 1 to the surgeon while the intraocular lens 2 is in the lens standby position. With the distal end 10a inserted into the incision, the surgeon moves the plunger 30 further forward from the lens standby position, thereby releasing the intraocular lens 2 into the eye. In such a surgical setting, by making it easy to confirm whether the intraocular lens 2 has been correctly moved to the lens standby position, the burden on medical personnel in the operating room, including the surgeon, assistant, and nurse, can be reduced.

[0051] Therefore, as Figure 7 and Figure 8As shown, the intraocular lens insertion device 1 according to this embodiment includes a standby state mark 80, which serves as a reference for the normal position of the plunger 30 when the intraocular lens 2 is in the lens standby position between the stage portion 12 and the end portion 10a. The standby state mark 80 is provided on the nozzle body 10. The lens standby position is the position where the intraocular lens 2 is in standby mode when it moves through the through hole 10c of the nozzle portion 15 and is folded into a concave shape when viewed from above. The standby state mark 80 serves as a reference for the normal position of the plunger 30 when the intraocular lens 2 reaches the lens standby position. The plunger 30 being in the normal position serves as a reference for the state in which the intraocular lens 2, moved forward by pressing the plunger 30, is properly folded.

[0052] Specifically, the standby status mark 80 is integrally formed with the nozzle portion 15 on the upper surface side of the nozzle portion 15. For example, when the nozzle body 10 is injection molded using a resin material, the standby status mark 80, which is molded in a raised shape on the upper surface side of the nozzle portion 15, is integrally formed with the nozzle body 10.

[0053] The standby status indicator 80 includes an end position indicator 80a, which serves as a reference for the normal position of the plunger 30 in the front-rear direction when the intraocular lens 2 is in the lens standby position. The end position indicator 80a is formed as a line extending in the left-right direction relative to the front-rear direction, which is the extension direction of the plunger 30. Furthermore, the left-right direction, as used in this specification, refers to a direction that is orthogonal to the extension direction of the plunger 30 and parallel to the bottom surface 12b of the storage portion formed by the stage portion 12 and the closed stage cover portion 13. Ideally, the end position indicator 80a should overlap with the end of the plunger 30 when viewed from above; however, it is sufficient that the end position indicator 80a and the end of the plunger 30 are in a sufficiently close position, and it is not necessary to consider the position where the end position indicator 80a overlaps with the end of the plunger 30 as the normal position of the plunger 30. Furthermore, the intraocular lens 2 only needs to be folded into a concave state in the lens standby position. The permissible range for the lens standby position is as long as the intraocular lens 2 is pushed into the vicinity of the end of the nozzle portion 15, where it tapers further towards the end. Therefore, the permissible range for the normal position of the plunger 30 is also as long as the entire intraocular lens 2 remains in a state further back than the opening portion 10b. By checking the relative position of the end position indicator 80a and the plunger 30, it can be confirmed whether the intraocular lens 2 or the plunger 30 is within the aforementioned permissible range.

[0054] Additionally, the standby status indicator 80 has a pair of push-out direction indicators 80b showing the push-out direction of the plunger 30. The push-out direction indicators 80b are formed as a pair of lines extending in the front-back direction, which is the push-out direction of the plunger 30. The spacing between the pair of push-out direction indicators 80b is set slightly wider than the plunger 30 viewed from above, serving as a reference that the plunger 30 is in its normal left-right position as long as the end of the plunger 30 is contained between the pair of push-out direction indicators 80b. If the end of the plunger 30 extends beyond the pair of push-out direction indicators 80b and deviates outward, the push-out direction of the intraocular lens 2 may be incorrect, and the intraocular lens 2 may not be properly folded. Inserting the intraocular lens 2 into the eye in such a folded state is undesirable. The condition that the plunger 30 is contained between the pair of push-out direction indicators 80b in the left-right direction serves as a reference for the surgeon, assistant, or nurse to determine if the intraocular lens 2 is properly folded. For example, an assistant or nurse might want to visually confirm the folding state of the plunger 30 or the intraocular lens, but without any markings, this confirmation is difficult or time-consuming. The intraocular lens insertion device 1 of this embodiment can also confirm the folding state of the intraocular lens by visually confirming the relative position of the standby state mark 80 and the plunger 30. Therefore, the intraocular lens insertion device 1 easily confirms the folding state of the intraocular lens 2.

[0055] Furthermore, in recent years, the minimally invasive nature of surgical incisions has been continuously developing. When inserting the intraocular lens 2 through a small incision, it is crucial that the intraocular lens 2 is properly folded. The intraocular lens insertion device 1 according to this embodiment makes it easy to confirm the folded state of the intraocular lens 2, thus facilitating the insertion of the properly folded intraocular lens 2 through a small incision. Therefore, the intraocular lens insertion device 1 can help improve the safety of the surgery.

[0056] Furthermore, regarding the standby status indicator 80, the end position display 80a and the pair of ejection direction displays 80b are connected. The end position display 80a and the pair of ejection direction displays 80b can be directly connected, or they can be connected via one or more straight lines or curves. The end position display 80a and the pair of ejection direction displays 80b are connected to form a U-shape. Even with the naked eye, it is easy to confirm from above that the plunger 30 is contained within the area surrounded by the end position display 80a and the pair of ejection direction displays 80b. Based on this configuration, the positional relationship between the standby status indicator 80 and the plunger 30 can be more easily confirmed in the intraocular lens insertion device 1 according to this embodiment.

[0057] Furthermore, the standby status mark 80 is integrally formed with the nozzle body 10 using a translucent material. On the other hand, the end of the plunger 30 is given a different color than the standby status mark 80 (blue in this embodiment). As a result, the end of the plunger 30 can be easily visually identified from the outside of the nozzle body 10, and the positional relationship between the standby status mark 80 and the plunger 30 can be more easily confirmed.

[0058] Furthermore, the intraocular lens insertion device 1 according to this embodiment has an injection volume mark 81, which is provided on the upper surface of the nozzle portion 15 between the stage portion 12 and the end portion 10a, indicating the injection volume of the viscoelastic material. The injection volume mark 81 is integrally formed with the nozzle portion 15. For example, when the nozzle body 10 is injection molded using a resin material, the injection volume mark 81, which is molded in a raised shape on the upper surface of the nozzle portion 15, is integrally formed with the nozzle body 10.

[0059] The injection volume mark 81 is formed in a forward-convex curved shape and is connected to a pair of ejection direction indicators 80b. In this embodiment, the injection volume mark 81 is formed continuously with the standby state mark 80, and is also formed of a transparent resin material like the standby state mark 80. When the surgeon or others inject the viscoelastic material from the injection port 18 onto the stage 12, it is preferable to inject the amount of viscoelastic material that reaches the injection volume mark 81. This amount is the amount of viscoelastic material required to allow the intraocular lens 2 to pass through the nozzle portion 15 and the distal portion 10a. The intraocular lens insertion device 1 according to this embodiment makes it easy to know whether the required amount of viscoelastic material has been injected, thus preventing over-injection or under-injection of the viscoelastic material.

[0060] In addition, such as Figure 8 As shown, the stage 12 has a stage upper surface 12g, which becomes the upper end surface of the stage 12 when the stage cover 13 is open. A fourth mounting portion 12e (an example of a "front support bracket") is formed protruding from the stage upper surface 12g toward the stage groove 12a. When the intraocular lens 2 is mounted, the fourth mounting portion 12e mounts the front support portion 2b. On the side of the upper end surface of the fourth mounting portion 12e away from the optical axis of the lens body 2a, a fourth positioning portion 12f is formed that further protrudes upward toward the fourth mounting portion 12e.

[0061] The anterior support portion 2b of the intraocular lens 2 is placed on the stage portion 12 in a position further forward than the lens body 2a, and the fourth mounting portion 12e supports the anterior support portion 2b. The fourth mounting portion 12e is formed at a height that supports at least a portion of the anterior support portion 2b on the side further forward of the top surface portion 13a than the end of the lens body 2a.

[0062] Next, the locking mechanism of the posterior support portion 2c of the intraocular lens 2 will be explained. Figure 9This is a perspective view showing an enlarged view of the end portion 31 of the plunger 30. The actuating portion 31 has two protrusions 31c and 31d provided on the end portion side. The protrusions 31c and 31d protrude forward, and a recess 31e is formed between the two protrusions 31c and 31d, which is recessed further rearward than the protrusions 31c and 31d. The upper end surface of the protrusion 31c is formed in a generally planar shape, and a wall portion 31f extending upward is formed on the rear side of this planar surface. The actuating portion 31 is exposed in the platform portion 12 at the initial position of the plunger 30, and a rear support portion 2c is mounted on the protrusion 31c.

[0063] When the movement based on the plunger 30 begins, the intraocular lens 2 adopts a backward tilted position. With the intraocular lens 2 in this backward tilted position, the protrusion 31c and the wall portion 31f engage at least a portion of the rear support portion 2c on the side closer to the top surface 13a than the rear end of the lens body 2a. By engaging the rear support portion 2c on the side closer to the top surface 13a than the lens body 2a, the intraocular lens insertion device 1 can place the rear support portion 2c onto the lens body 2a when the plunger 30 moves forward, and with the rear support portion 2c folded onto the lens body 2a, the intraocular lens 2 is properly folded. Thus, the intraocular lens insertion device 1 can stabilize the movement of the intraocular lens. Furthermore, the lens body 2a is pressed by the recess 31e, making it easier to place the rear support portion 2c, engaged on the protrusion 31c, onto the upper side of the lens body 2a.

[0064] The intraocular lens insertion device 1 moves forward using the plunger 30 while simultaneously folding the intraocular lens 2. By checking the relative position of the standby status mark 80 and the plunger 30, the intraocular lens insertion device 1 can easily confirm that the plunger 30 is in the normal position when the lens is in the standby position, and can easily confirm whether the intraocular lens 2 has been folded properly.

[0065] The above is a description of this embodiment, but the intraocular lens insertion device 1 disclosed in this case is not limited to the above embodiment, and various changes can be made within the scope of not losing the same technical concept as the present invention.

[0066] In the above embodiments, the intraocular lens insertion device 1 is a pre-positioned type in which the intraocular lens 2 is pre-stored in the stage 12, but the intraocular lens insertion device 1 disclosed in this case is not limited to this. For example, the intraocular lens insertion device 1 may also be a separate type in which the surgeon places the intraocular lens 2 in the intraocular lens insertion device 1 during use.

[0067] Explanation of reference numerals in the attached figures 1: Intraocular lens insertion device 2: Intraocular lens 2a: Lens body 2b: Front support section 2c: Rear support section 2d: Joint 10: Nozzle body 11: Grip section 12: Taiwan 13: Platform Cover 14: Connecting part 15: Nozzle section 17: Confirmation Window 18: Injection Hole 19: Guide Wall 30: Plunger 50: Retaining component 80: Standby status flag 81: Injection volume marker.

Claims

1. An intraocular lens insertion device, comprising: inserting an intraocular lens through an incision formed in the eye; The instrument body includes a storage section and an insertion section. The storage section houses the intraocular lens, and the insertion section is positioned further distally than the storage section, communicates with the storage section, and is inserted into the incision opening. The ejector component moves the intraocular lens, which is placed in the receiving section, toward the distal end. The main body of the device has a standby state mark, which serves as a reference for the normal position of the ejection component when the intraocular lens is in a standby position between the storage section and the insertion tube section.

2. The intraocular lens insertion device according to claim 1, wherein, The standby status indicator includes: an end position indicator, which serves as a reference for the normal end position of the ejection member when the intraocular lens is in the standby position; and an ejection direction indicator, which serves as a reference for the normal position in the left-right direction, which is orthogonal to the ejection direction and parallel to the bottom surface of the storage portion.

3. The intraocular lens insertion device according to claim 2, wherein, The end position display element is formed in the shape of a line extending along the left-right direction. The ejection direction indicator is formed as a pair of lines extending along the ejection direction. The standby status marker forms a shape in which the end position display is connected to the push-out direction display.

4. The intraocular lens insertion device according to claim 1 or 2, wherein, The standby status indicator is integrally formed of a translucent material with the main body of the device. The end of the ejection component is given a different color than the standby state marker.

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