JP2022150383A - Intraocular lens insertion device - Google Patents

Abstract

To compatibly attain restriction of movement of an intraocular lens in storage and optimal tucking of a rear support part in the ejection thereof in an intraocular lens insertion device.SOLUTION: A cylindrical body includes: a storage part 22 for storing an intraocular lens 100; and a first restriction part 41 for restricting movement of an outer periphery part 110a (an edge) being farthest from a pushing shaft Lp out of an optical part 110, in a direction parallel to an optical axis. The first restriction part 41 is configured into a flange shape extending from a right-side inner wall 22d which is a side where a root portion 116B of a rear support part 112B is not disposed thereon out of an inner wall of a storage part 22 facing an in-plane direction of an optical surface of the optical part 110 which is a direction crossing the pushing shaft Lp, to a position facing a part of a front optical surface 110c in the optical part 110. A first gap allowing passage of a tip of the rear support part 112B to be deformed to a position facing the front optical surface 110c is provided between the first restriction part 41 and a ceiling surface (a ceiling inner wall).SELECTED DRAWING: Figure 5

Description

The present disclosure relates to an intraocular lens insertion device for inserting an intraocular lens into the eye.

Conventionally, as one of cataract surgery methods, a method of inserting a bendable soft intraocular lens into the eye instead of the crystalline lens is generally used. In some cases, an intraocular lens is inserted in front of the lens to correct the refractive power of the eye. An intraocular lens insertion device called an injector is sometimes used to insert the intraocular lens into the eye.

As such an injector, the intraocular lens is pushed out through a hollow portion in which the inner diameter gradually decreases toward the distal end of the insertion portion having a notch formed at the distal end. An ejecting intraocular lens insertion device is known (for example, Patent Document 1). The intraocular lens insertion device of Patent Document 1 ejects the intraocular lens while tucking the rear supporting part onto the optical part. Further, there is provided an intraocular lens insertion device capable of storing the intraocular lens while supporting the edge of the optical part with a lens supporting member and smoothly pushing out the intraocular lens from the stored state into the eye with the pushing shaft. Are known.

Japanese Patent Application Laid-Open No. 2004-351196

However, in the intraocular lens insertion device disclosed in Patent Document 1, when the intraocular lens insertion device in which the intraocular lens is pre-filled is ejected by tacking the posterior supporting part on the optical part, There was a case where the support part interfered with the movement restriction mechanism for storage. This interference can cause unintended deformation of the rear support.

Therefore, the present disclosure has been made in order to solve the above-described problems. The technical challenge is what can be done.

An intraocular lens insertion device provided by a typical embodiment of the present disclosure includes a disc-shaped optical portion and a pair of support portions extending radially outward from the outer peripheral portion of the optical portion. The stored intraocular lens is stored in advance on an extrusion shaft inside the main body, and the stored intraocular lens is pushed out along the extrusion shaft from the base end side to the distal end side by a rod-shaped plunger to be inserted into the patient's eye. An intraocular lens insertion device for inserting an intraocular lens, wherein the cylindrical main body has a front support portion, which is one support portion, on the distal side of the optical portion, and another support portion on the proximal side of the optical portion. a storage unit in which the intraocular lens is stored such that the posterior support portions, which are support units, are arranged respectively; a first restricting portion that restricts movement of the farthest edge from the extrusion axis in a direction parallel to the optical axis, wherein the first restricting portion is in the in-plane direction of the optical surface of the optical portion; Extends from a side inner wall side, which is a side on which the base of the rear support portion is not arranged, of the inner walls of the storage portion facing the direction intersecting the extrusion axis to a position facing a part of the front optical surface of the optical portion. Between the first restricting portion and a ceiling inner wall facing the front optical surface among the inner walls of the storage portion, the rear portion is deformed to a position facing the front optical surface. A first gap is provided through which the tip of the support can pass.

According to the intraocular lens insertion device of the present disclosure, it is possible to achieve both restriction of movement of the intraocular lens during storage and suitable tacking of the rear support portion during injection.

1 is a plan view of an intraocular lens insertion device; FIG. 1 is a side view of an intraocular lens insertion device; FIG. 1 is a plan view of an intraocular lens; FIG. Fig. 2 is a right side view of the intraocular lens; FIG. 3 is a cross-sectional view taken along line VV of FIG. 2; FIG. 6 is a sectional view taken along the line VI-VI of FIG. 5; FIG. 6 is a cross-sectional view for explaining the case where the posterior supporting portion of the intraocular lens has a tacking failure, using a view equivalent to FIG. 5 ; FIG. 3 is a cross-sectional view taken along line VIII-VIII of FIG. 2 when the posterior supporting portion of the intraocular lens is normally tacked; FIG. 3 is a cross-sectional view taken along line IX-IX of FIG. 2; FIG. 10 is a cross-sectional view taken along the line XX of FIG. 9; FIG. 10 is a cross-sectional view taken along line XI-XI of FIG. 9; FIG. 11 is a cross-sectional view equivalent to FIG. 10 for explaining a case where the posterior supporting portion of the intraocular lens has a tacking failure; FIG. 10 is a cross-sectional view taken along line XIII-XIII of FIG. 9 when the posterior supporting portion of the intraocular lens is normally tacked;

<Overview>
An intraocular lens insertion device exemplified in the present disclosure includes an intraocular lens having a disc-shaped optic and a pair of supporting members extending radially outward from the outer peripheral portion of the optic. It is an intraocular lens insertion device that inserts the intraocular lens into the patient's eye by pushing out the stored intraocular lens from the proximal side to the distal side along the pushing axis with a rod-shaped plunger. be. The tubular main body stores the intraocular lens so that the anterior supporting part, which is one of the supporting parts, is arranged on the distal side of the optical part, and the posterior supporting part, which is the other supporting part, is arranged on the proximal side. a storage unit provided in the storage unit and a first regulation that regulates movement in a direction parallel to the optical axis of the edge farthest from the extrusion axis in the optical part of the intraocular lens stored in the storage unit and The first restricting portion extends from the lateral inner wall side, which is the side on which the base of the rear support portion is not disposed, of the inner walls of the storage portion facing in the in-plane direction of the optical surface of the optical portion and in the direction intersecting the extrusion axis. It is configured in a brim shape extending to a position facing a part of the front optical surface in the part. A first gap is provided between the first restricting part and the ceiling inner wall facing the front optical surface among the inner walls of the storage part, through which the tip of the rear support part deformed to face the front optical surface can pass. there is

According to the intraocular lens insertion device of the present disclosure, since the intraocular lens insertion device of the present disclosure has the first restricting part, the edge of the optical part of the intraocular lens stored in the storage part that is farthest from the extrusion axis moves in the direction parallel to the optical axis. can be regulated. In addition, the first restricting portion has a brim shape extending from the side inner wall side of the inner wall of the storage portion where the base of the rear support portion is not disposed to a position facing a part of the front optical surface of the optical portion. A first gap is provided between the first restricting portion and the ceiling inner wall. Therefore, when the rear support portion is tacked, the front end passes through the first gap, so that suitable tacking can be performed. Therefore, it is possible to achieve both restriction of movement of the intraocular lens during storage and suitable tacking of the rear support portion during ejection.

In the intraocular lens insertion device described above, a second lens for restricting movement of a peripheral edge of the optical portion of the intraocular lens stored in the storage unit, which is located on the base end side of the push shaft, in a direction parallel to the optical axis. A regulation part may be provided. The second restricting portion has a flange shape extending in the in-plane direction of the optical surface of the optical portion from the base end side of the extrusion shaft to a position facing a portion of the front optical surface. A second gap is provided between the second restricting portion and the ceiling inner wall, through which the tip of the rear supporting portion deformed to face the front optical surface can pass. With such a configuration of the second restricting portion, when tacking of the rear support portion is started, the rear support portion can be guided from the base end side of the push shaft to the front optical surface, thereby achieving more suitable tacking.

Further, each of the first restricting portion and the second restricting portion of the intraocular lens insertion device may extend and be connected in the circumferential direction of the optical portion while maintaining the shape of the flange. Accordingly, since the first restricting portion and the second restricting portion are connected, the entire rear support portion can be easily tucked up to the front optical surface.

Moreover, in the above intraocular lens insertion device, the first restricting portion may be arranged closer to the proximal end of the push shaft than a virtual plane that is orthogonal to the push shaft and includes the optical axis. Accordingly, when the entire intraocular lens is advanced after tacking the rear supporting part, interference of the first restricting part can be suppressed, so that unintended deformation of the intraocular lens is less likely to occur.

In the above intraocular lens insertion device, the first restricting part and the second restricting part are connected to each other so that the rear supporting part can be slid during the process in which the front end of the rear supporting part is deformed to face the front optical surface. slope may be formed. Since the rear support portion can be gradually deformed by the slope, tacking can be performed smoothly.

<First embodiment>
A first embodiment, which is one of the typical embodiments of the present disclosure, will be described below with reference to the drawings.

<Injector 1 (intraocular lens insertion device)>
The structure of the injector 1, which is an intraocular lens insertion device, will be described. As shown in FIGS. 1 and 2, the injector 1 (intraocular lens insertion device) of this embodiment comprises an insertion device main body 10 (cylindrical main body), a plunger 12, and the like. The insertion instrument main body 10 includes an insertion section 20, a storage section 22, and the like. Such an injector 1 is formed, for example, by injection molding using a resin material (eg, polypropylene) or the like. Moreover, the injector 1 may be formed by cutting out resin. Note that the injector 1 may be of a cartridge type in which the insertion portion 20 is replaceable. The injector 1 of the present embodiment is a so-called preload type, and is shipped with the intraocular lens 100 filled in advance.

<Intraocular lens 100>
An example of the intraocular lens 100 inserted into the eye by the injector 1 (intraocular lens insertion device) will be described. As shown in FIGS. 3 and 4, in the intraocular lens 100 used in this embodiment, the optical part 110 and the pair of support parts, i.e., the front support part 112A and the rear support part 112B, are made of a flexible material. It is an integrally molded one-piece type intraocular lens. The intraocular lens 100 is made of various soft resin materials such as BA (butyl acrylate), HEMA (hydroxyethyl methacrylate) alone, acrylic acid ester and methacrylic acid ester composites, and the like. can be adopted. Although the first embodiment illustrated a so-called one-piece type intraocular lens 100, at least a part of the technology illustrated in the present disclosure includes the optical section 110 and a pair of support sections (anterior support section 112A and rear support section 112B). ) is formed by a separate member, so-called three-piece type intraocular lens.

The optical section 110 provides a predetermined refractive power to the patient's eye. The optical section 110 is formed in a disk shape. An optical axis L of the optical section 110 passes through the center of the optical section 110 and extends in the vertical direction (thickness direction of the optical section 110). In addition, the front support portion 112A and the rear support portion 112B extend curvedly outward (outside) in the radial direction from the outer peripheral portion 110a (edge) of the optical portion 110, and the optical axis L, which is the center of the optical portion 110, is the reference. are formed at point-symmetrical positions. The front support portion 112A has a root portion 116A connected to the outer peripheral portion 110a of the optical portion 110 via a connecting portion 114A, and has a loop shape curved in the circumferential direction, and a distal end portion 118A is open. (That is, the tip portion 118A is a free end). The rear support portion 112B has a root portion 116B connected to the outer peripheral portion 110a of the optical portion 110 via a connecting portion 114B, and has a loop shape curved in the circumferential direction, and a distal end portion 118B is open ( That is, the tip portion 118B is a free end). The optical section 110 has a front optical surface 110c facing a ceiling surface 22b of the storage section 22 as will be described later, as an end surface in the direction of the optical axis L, and a bottom surface 22c of the storage section 22 on the opposite side of the front optical surface 110c. and a facing rear optical surface 110b.

In the intraocular lens 100 of this embodiment, only the thickness of the optical part 110 differs depending on the power of the lens. The shape does not change. That is, the radius of curvature of the front optical surface 110c and the rear optical surface 110b, and the thickness of the outer peripheral portion 110a (also referred to as edge) change according to the power, and the thickness of the optical portion 110 changes.

<Insertion instrument main body 10 (cylindrical main body)>
Details of the insertion instrument main body 10 will be described with reference to FIG. 5 . The insertion instrument main body 10 includes an insertion section 20, a storage section 22, and the like. The insertion section 20 and the storage section 22 are formed in a hollow cylindrical shape.

<Insert portion 20>
As shown in FIGS. 5 and 6, the insertion portion 20 has a passage 20b (front passage). In the passage 20b, the space through which the intraocular lens 100 passes becomes narrower toward the distal end 20a of the insertion section 20 for folding the intraocular lens 100. As shown in FIG. That is, the passage area gradually decreases toward the tip 20a. The passage area is the cross-sectional area of the passage 20b in a cross section orthogonal to the pushing direction of the intraocular lens 100 (leftward direction in FIG. 5).

A notch (bevel) is formed at the distal end 20a of the insertion portion 20 for delivering the intraocular lens 100 to the outside. After passing through the passage 20b, the intraocular lens 100 is folded small along the inner wall surface 20c (front inner wall surface), delivered to the outside through a notch at the tip 20a, and inserted into the eye. In addition, the inner wall surface 20c (the first inner wall surface 24a and the second inner wall surface 24b) is in a direction orthogonal to the central axis Lt direction of the passage 20b, and is an optical axis when the intraocular lens 100 is arranged in the passage 20b. It is formed on both sides in a direction parallel to the radial direction of the portion 110 . The first inner wall surface 24a and the second inner wall surface 24b are formed in a shape (inclination) symmetrical with respect to the central axis Lt of the passage 20b.

The ceiling surface (the inner wall on the front side of the paper surface of FIG. 5) and the bottom surface 20e (see FIG. 5) are perpendicular to the central axis Lt direction of the passageway 20b, and when the intraocular lens 100 is placed in the passageway 20b are formed on both sides in a direction parallel to the central axis (optical axis) L direction of the optical section 110 . The bottom surface 20e is concavely curved to the outside of the passage 20b (toward the back of the paper surface of FIG. 5).

Here, as shown in FIGS. 5 and 6, assuming that the X-axis, Y-axis, and Z-axis are orthogonal to each other, a direction parallel to the extrusion direction of the intraocular lens 100 (the central axis Lt direction of the passages 20b and 22a) , extrusion axis Lp direction) is defined as the X-axis direction. Then, the passage 20b has two inner wall surfaces 20c (a first inner wall surface 24a and a second inner wall surface 24b) formed on both sides in the Y-axis direction, and a ceiling surface formed on both sides in the Z-axis direction (Fig. 5). It is surrounded by the inner wall on the front side of the paper) and the bottom surface 20e (see FIG. 5). A central axis Lt of the passage 20b coincides with the extrusion axis Lp.

<Storage unit 22>
As shown in FIG. 5, the storage section 22 is formed at a position behind the insertion section 20 in the pushing direction of the plunger 12 (rightward in FIG. 5). The intraocular lens 100 before being pushed out by the plunger 12 is filled (arranged) in advance in a passage 22 a (rear passage) formed inside the storage section 22 .

In addition, the storage unit 22 is arranged in a direction (a direction orthogonal to the optical axis L) of the optical surfaces (the front optical surface 110c and the rear optical surface 110b) of the optical unit 110 and in a direction (the Y-axis direction) intersecting the extrusion axis Lp. ). The side inner wall is composed of a right side inner wall 22d (a wall surface above the extrusion axis Lp in the paper surface of FIG. 5) and a left side inner wall 22e (a wall surface below the extrusion axis Lp in the paper surface of FIG. 5). As a result, the passage 22a in the storage section 22 forms an internal space surrounded by a ceiling surface 22b (see FIG. 6), a bottom surface 22c, a right inner wall 22d, and a left inner wall 22e.

Here, the intraocular lens 100 stored in the storage unit 22 will be described. In the intraocular lens 100, as shown in FIG. It faces the bottom surface 22c. Further, the optical section 110 is disposed substantially in the center of the storage section 22 in the direction of the extrusion axis Lp (X-axis direction) and substantially in the center of the left-right direction (Y-axis direction) intersecting the extrusion axis Lp. As a result, the optical axis L of the optical section 110 is arranged on the extrusion axis Lp. In the intraocular lens 100, a front support portion 112A, which is one of the support portions, is arranged on the front side (the distal end 20a of the insertion portion 20) side (left direction in FIG. 5) with respect to the optical portion 110 of the intraocular lens 100. . A root portion 116A of the front support portion 112A is arranged on the right inner wall 22d side. In addition, the intraocular lens 100 is positioned on the rear side (the proximal side of the extrusion axis Lp, opposite to the distal end 20a of the insertion section 20) (rightward in FIG. 5) with respect to the optical section 110 by the other support section. A certain rear support 112B is provided. A root portion 116B of the rear support portion 112B is arranged on the left inner wall 22e side.

Further, the storage unit 22 is provided with a first pin 31, a second pin 32, a third pin 33, a first restricting portion 41, a second restricting portion 42, and a third restricting portion 43, as shown in FIG. there is The intraocular lens 100 during storage is held in the storage section 22 of the optical section 110 by the first pin 31 , the second pin 32 , the third pin 33 , the first restricting section 41 , the second restricting section 42 , and the third restricting section 43 . movement is restricted. The first restricting portion 41, the second restricting portion 42, and the third restricting portion 43 prevent the outer peripheral portion 110a (edge) of the optical portion from moving in a direction parallel to the optical axis L (the Z-axis direction in FIG. 5). regulate. Further, the first restricting portion 41 and the third restricting portion 43 restrict movement of the optical portion 110 in the left-right direction (Y-axis direction) intersecting the extrusion axis Lp. The first pin 31, the third pin 33, and the second restricting portion 42 restrict movement of the optical portion 110 in the extrusion axis Lp direction (X-axis direction, front-rear direction). The second pin 32 regulates the circumferential rotation of the intraocular lens 100 .

The first pin 31, the second pin 32, and the third pin 33 are shaft-shaped members that can be inserted into and removed from the passage 22a from the outside of the storage unit 22. (immediately before pushing the plunger 12), the user removes it from the insertion device main body 10. When the first to third pins 31 to 33 are removed, the intraocular lens 100 can move in the distal direction of the extrusion axis Lp. The first pin 31 is arranged on the front side of the optical axis L and on the extrusion axis Lp in the outer periphery adjacent to the outer peripheral portion 110a (edge) of the optical portion 110 . As a result, the first pin 31 restricts the movement of the optical portion 110 toward the front side (the distal end 20a of the insertion portion 20) (leftward in FIG. 5) in the direction of the extrusion axis Lp (the X-axis direction, the front-rear direction). . The second pin 32 is located at a position adjacent to the base portion 116B of the rear support portion 112B in the outer periphery adjacent to the outer peripheral portion 110a (edge) of the optical portion 110, and is located behind the outer peripheral portion 110a (edge) and the rear support portion 112B. It is arranged at a position sandwiched between the support portions 112B. Thereby, the second pin 32 restricts the rotation of the intraocular lens 100 in the circumferential direction (counterclockwise rotation on the paper surface of FIG. 5).

The first restricting portion 41 is provided in the storage portion 22 . The first restricting part 41 is arranged so that the part of the outer peripheral part 110a (edge) of the optical part 110 in the intraocular lens 100 stored in the storage part 22, which is the farthest from the extrusion axis Lp, is parallel to the optical axis L. direction (the Z-axis direction in FIG. 5) is restricted. The first restricting portion 41 has a flange shape extending from the right inner wall 22 d side to a position facing a portion of the front optical surface 110 c of the optical portion 110 . The right inner wall 22d faces the in-plane direction (perpendicular to the optical axis L) of the optical surfaces (the front optical surface 110c and the rear optical surface 110b) of the optical unit 110 and intersects the extrusion axis Lp. 5 (wall surface above the extrusion axis Lp in FIG. 5) on the side where the root portion 116B of the rear support portion 112B is not provided. The first restricting portion 41 is arranged on the base end side of the extrusion axis Lp (rightward in FIG. 5) with respect to the imaginary plane Vs that is perpendicular to the extrusion axis Lp and includes the optical axis L. Here, a first gap S1 (see FIG. 6) is provided between the first restricting portion 41 and the ceiling surface 22b (ceiling inner wall) of the inner wall of the storage portion 22 facing the front optical surface 110c. . The first gap S1 is larger than the thickness T1 (see FIG. 4) of the rear support portion 112B. Due to this first gap S1, when the rear support portion 112B is tacked (deformed) to a position facing the front optical surface 110c, the rear support portion 112B and its tip portion 118B pass through without interfering with the parts inside the storage portion 22. can. For example, the maximum thickness in the distal half region of the length of the rear support portion 112B may be the aforementioned thickness T1.

Here, consider the tacking of the rear support portion 112B when it is assumed, for example, that the first restricting portion 41 has a shape projecting downward from the ceiling surface 22b toward the bottom surface 22c (in other words, a structure without the first gap). . In this case, as shown in FIG. 7, when the rear support portion 112B contacts the first restricting portion 41 while the rear support portion 112B is being tucked, the tip portion 118B of the rear support portion 112B bends toward the base end side of the extrusion axis Lp. There is a risk that it will be lost. A possible reason for the contact between the rear support portion 112B and the first restricting portion 41 is that, for example, the higher the room temperature, the softer the entire intraocular lens 100 becomes and the easier it is to deform greatly. On the other hand, as shown in FIG. 8, the storage section 22 is provided with a first gap S1 between the first restricting section 41 and the ceiling surface 22b. Therefore, the front end portion 118B of the rear support portion 112B can pass through the first gap S1, so that unintended deformation is unlikely to occur.

The second restricting part 42 is arranged so that the outer peripheral portion 110a (edge) of the optical part 110 of the intraocular lens 100 stored in the storage part 22, which is on the proximal end side of the extrusion axis Lp, is parallel to the optical axis L (Fig. 5, movement in the Z-axis direction) is restricted. The second restricting portion 42 is positioned in the in-plane direction (perpendicular to the optical axis L) of the optical surfaces (the front optical surface 110c and the rear optical surface 110b) of the optical portion 110 and the base end side of the extrusion axis Lp (in FIG. 5). right) to a position facing a portion of the front optical surface 110c. A second gap S2 (see FIG. 6) is provided between the first restricting portion 41 and the ceiling surface 22b (ceiling inner wall). The second gap S2 has the same gap distance as the first gap S1. Due to this second gap S2, when the rear support portion 112B is tucked (deformed) to a position facing the front optical surface 110c, the rear support portion 112B and its tip portion 118B pass through without interfering with the parts inside the storage portion 22. can.

The third restricting portion 43 is provided in the storage portion 22 . The third restricting part 43 is arranged so that the part of the outer peripheral part 110a (edge) of the optical part 110 of the intraocular lens 100 stored in the storage part 22, which is the farthest from the extrusion axis Lp, is parallel to the optical axis L. direction (the Z-axis direction in FIG. 5) is restricted. The third restricting portion 43 has a flange shape extending from the left inner wall 22e side to a position facing a portion of the front optical surface 110c of the optical portion 110. As shown in FIG. The left inner wall 22e faces the in-plane direction (perpendicular to the optical axis L) of the optical surfaces (the front optical surface 110c and the rear optical surface 110b) of the optical unit 110 and intersects the extrusion axis Lp. 5 is the wall surface on the side where the root portion 116B of the rear support portion 112B is arranged (the wall surface below the extrusion axis Lp in the paper surface of FIG. 5). The third restricting portion 43 is disposed closer to the proximal end of the extrusion axis Lp than the imaginary plane Vs that is orthogonal to the extrusion axis Lp and includes the optical axis L.

As shown in FIG. 5, the bottom surface 22c of the passageway 22a formed inside the storage unit 22 has an inner wall surface 22c where the intraocular lens 100 is pushed out by the plunger 12 toward the distal end 20a of the insertion unit 20 and moves. , a convex portion 22f for suppressing the inclination of the optical portion 110 is provided. The convex portion 22f is disposed at a position facing the outer peripheral portion 110a, which is the edge of the optical portion 110 of the intraocular lens 100, as follows. The convex portion 22f is on the front side (the distal end 20a of the insertion portion 20) (left direction in FIG. 5) of the optical axis L of the optical portion 110 of the intraocular lens 100, and is aligned with the central axis Lt (extrusion direction of the plunger 12). ) where the root portion 116A of the anterior support portion 112A of the intraocular lens 100 is not disposed (left side inner wall 22e: lower side than the central axis Lt in FIG. 5) . The convex portion 22f protrudes in a mountain-like shape from the bottom surface 22c toward the ceiling surface 22b and is close to the outer peripheral portion 110a of the optical portion 110 on the rear optical surface 110b side. The protruding portion 22f has a tapered shape in the protruding direction, and a fillet process is performed to round the tip portion. The convex portion 22f can suppress the inclination of the optical portion 110 when the intraocular lens 100 is pushed out by the plunger 12, and the anterior support portion 112A of the intraocular lens 100 is unintentionally moved toward the rear optical surface 110b. It is possible to suppress the occurrence of a so-called "back tacking state" in which tacking occurs. Here, in the intraocular lens 100 with the tucked rear support part 112B, a restoring force is accumulated in the intraocular lens 100 to release the tucked state. Since the rear support portion 112B is pushed by the plunger 12, the aforementioned restoring force tends to act as a stress in the lower left direction of the optical portion 110 (the lower left direction on the paper surface of FIG. 5). At this time, if the gap between the optical section 110 and the bottom surface 22c of the storage section 22 is large, the optical section 110 is likely to be greatly deformed toward the gap. Therefore, by providing the convex portion 22f that fills the gap, unintended deformation (such as turning over) of the optical portion 110 is suppressed.

A method of using the injector 1 (intraocular lens insertion device) of Embodiment 1 will be described. In the injector 1 , the intraocular lens 100 is pre-filled in the storage section 22 . When the user pushes the push-out portion formed at the proximal end of the plunger 12 to advance the plunger 12 as a whole, the intraocular lens 100 with the rear support portion 112B tacked moves toward the central axis Lt (in the push-out direction of the plunger 12). is extruded along the extrusion axis Lp). At this time, the rear support portion 112B slides in the second gap S2 above the second restricting portion 42, and the tip portion 118B passes through the first gap S1 above the first restricting portion 41. As shown in FIG. Therefore, the rear support portion 112B is less likely to come into contact with the inner wall of the storage portion 22 or the like during tacking, and the distal end portion 118B is less likely to bend toward the proximal end side of the extrusion shaft Lp. For example, when the room temperature is high, the entire intraocular lens 100 becomes soft, and the rear support portion 112B can be preferably tucked even in a state where it is likely to be greatly deformed. In the intraocular lens 100, when the plunger 12 is further pushed out, the front support part 112A is also tucked onto the front optical surface 110c of the optical part 110, and then the entire optical part 110 is deformed into a roll shape to be inserted into the eye from the insertion opening. Lens 100 is ejected.

<Second embodiment>
Next, a second embodiment, which is one of the typical embodiments of the present disclosure, will be described with reference to the drawings. In describing the injector 201 of Embodiment 2, the same reference numerals as those of Embodiment 1 are assigned to components that are substantially the same as those of Embodiment 1, and detailed description thereof may be omitted.

The second embodiment has a canopy 50 as shown in FIGS. The canopy 50 has a form in which each of the first restricting portion 41 and the second restricting portion 42 is extended and connected in the circumferential direction of the optical portion 110 while maintaining the flange shape. The canopy 50 is arranged on the base end side of the extrusion axis Lp with respect to the imaginary plane Vs that is orthogonal to the extrusion axis Lp and includes the optical axis L. The canopy 50 is formed with a slope 52 (see FIG. 11) for sliding the rear support portion 112B in the process of deforming the tip of the rear support portion 112B to face the front optical surface 110c. Between the eaves 50 and the ceiling surface 22b (ceiling inner wall), a third gap S3 is provided through which the tip portion 118B of the rear support portion 112B deformed to face the front optical surface 110c can pass. The third gap S3 is the same gap interval as the first gap S1 and the second gap S2. The canopy 50 also has a projecting portion 54 (see FIG. 10) projecting toward the bottom surface 22c on the surface facing the front optical surface 110c. The projecting portion 54 prevents the optical portion 110 from sticking to the eaves 50 . Note that the injector 201 of the second embodiment also has the configuration of the convex portion 22f.

Here, for example, consider a case where only the second restricting portion 42 in the first embodiment is configured. As shown in FIG. 12, when the optical portion 110 is shifted forward from the predetermined position during tacking, the second restricting portion 42 can support the tip portion 118B of the rear support portion 112B. Otherwise, the tip portion 118B of the rear support portion 112B hangs down on the outer peripheral portion 110a of the optical portion 110, and the tip portion 118B easily contacts the outer peripheral portion 110a (side surface of the optical portion 110). As described above, when the room temperature is high, the rear support portion 112B becomes soft, so that the rear support portion 112B hangs down more easily, and such contact is more likely to occur. On the other hand, as shown in FIG. 13, since the eaves 50 in the second embodiment are configured to support the entire rear support portion 112B, the tip portion 118B reliably passes over the eaves 50 . As a result, for example, even if the optical section 110 is displaced from the predetermined position, the tip portion 118B of the rear support section 112B is less likely to come into contact with the side surface of the optical section 110 .

A method of using the injector 201 (intraocular lens insertion device) of Embodiment 2 will be described. In the injector 201, the intraocular lens 100 is filled in the storage portion 22 in advance. When the user pushes the push-out portion formed at the proximal end of the plunger 12 to advance the plunger 12 as a whole, the intraocular lens 100 with the rear support portion 112B tacked moves toward the central axis Lt (in the push-out direction of the plunger 12). is extruded along the extrusion axis Lp). At this time, the rear support portion 112B slides on the slope 52 (see FIG. 11) of the eaves 50 and passes through the third gap S3. Here, since the eaves 50 are configured to support the entire rear support portion 112B, the rear support portion 112B comes into contact with the inner wall of the storage portion 22 during tucking, and the tip portion 118B is pushed out from the base of the extrusion shaft Lp. It is difficult to bend to the edge side. For example, when the room temperature is high, the entire intraocular lens 100 becomes soft, and the rear support portion 112B can be preferably tucked even in a state where it is likely to be greatly deformed. Further, when the rear support portion 112B is tacked, if there is a viscoelastic substance, the resistance of the viscoelastic substance may cause the tip portion 118B to bend toward the bottom surface 22c. However, since the canopy 50 is configured to support the entire rear support portion 112B, it is unlikely that only the tip portion 118B is bent toward the bottom surface 22c due to the resistance of the viscoelastic material. The canopy 50 can suppress tacking failure of the rear support portion 112B that is deformed to a position facing the front optical surface 110c. In the intraocular lens 100, when the plunger 12 is further pushed out, the front support part 112A is also tucked onto the front optical surface 110c of the optical part 110, and then the entire optical part 110 is deformed into a roll shape to be inserted into the eye from the insertion opening. Lens 100 is ejected.

In Embodiments 1 and 2, names such as "bottom surface 20e", "ceiling surface 22b", and "bottom surface 22c" are for convenience and do not strictly define the vertical direction of the injector 1. For example, the bottom surface 20 e is not always located below the intraocular lens 100 . That is, the vertical direction of the injector 1 can change during transportation, filling of the injector 1 with a viscoelastic substance, insertion of the intraocular lens 100 into the eye, and the like. Further, the front optical surface 110c (first optical surface) and the rear optical surface 110b (second optical surface) in Embodiments 1 and 2 may be reversed. That is, the optical surface used as the front optical surface 110c in the first and second embodiments may be the rear optical surface 110b.

In this way, according to the injectors 1 and 201 (intraocular lens insertion device) according to the first and second embodiments of the present disclosure, since they have the first restricting portion 41 or the canopy 50, the eye stored in the storage portion 22 is In the optical portion 110 of the inner lens 100, the outer peripheral portion 110a (periphery) farthest from the extrusion axis Lp can be restricted from moving in the direction parallel to the optical axis L (the Z-axis direction in FIG. 5). In addition, the first restricting portion 41 or the eaves 50 extends from the right side inner wall 22d side of the inner wall of the storage portion 22 on which the base portion 116B of the rear support portion 112B is not disposed to the front optical surface 110c of the optical portion 110. A first gap S1 and a third gap S3 are provided between the first restricting part 41 and the ceiling surface 22b (ceiling inner wall). Therefore, when the rear support portion 112B is tacked, the tip portion 118B passes through the first gap S1 and the third gap S3, thereby enabling suitable tacking. Therefore, it is possible to achieve both restriction of movement of the intraocular lens 100 during storage and suitable tacking of the rear support portion 112B during ejection.

In addition, the second restricting portion 42 moves the outer peripheral portion 110a (edge) of the optical portion 110 of the intraocular lens 100 stored in the storage portion 22 in the direction of the optical axis L on the proximal end side of the extrusion axis Lp. regulate the The second restricting portion 42 extends in the in-plane direction (perpendicular to the optical axis L) of the optical surfaces (the front optical surface 110c and the rear optical surface 110b) of the optical unit 110 from the base end side of the extrusion axis Lp to the front optical surface. It is configured in a brim shape extending to a position facing a part of 110c. Between the second restricting portion 42 and the ceiling surface 22b (ceiling inner wall), a second gap S2 is provided through which the tip portion 118B of the rear support portion 112B deformed to face the front optical surface 110c can pass. there is Due to the configuration of the second restricting portion 42, suitable tacking of the rear support portion 112B is further achieved.

In addition, the eaves 50 has a configuration in which the first restricting portion 41 and the second restricting portion 42 are each extended and connected in the circumferential direction of the optical portion 110 while maintaining the shape of the flange. As a result, since the eaves 50 have the functions of the first restricting portion 41 and the second restricting portion 42 connected, the entire rear support portion 112B can be easily tucked up to the front optical surface 110c.

In addition, the first restricting portion 41 and the eaves 50 are arranged closer to the proximal end of the extrusion axis Lp than the imaginary plane Vs that is perpendicular to the extrusion axis Lp and includes the optical axis L. Accordingly, when the entire intraocular lens 100 is advanced after tucking the rear support part 112B, the interference of the first restricting part 41 can be suppressed, so that the intraocular lens 100 is less likely to deform unintentionally.

Also, the canopy 50 is formed with a slope 52 for sliding the rear support portion 112B in the process of deforming the front end portion 118B of the rear support portion 112B to face the front optical surface 110c. The slope 52 can smoothly tack the rear support portion 112B.

In addition, the intraocular lens 100 includes a pair of a front support portion 112A and a rear support portion 112B extending radially outward from the outer peripheral portion of the optical portion 110. A convex portion 22f is provided to suppress the inclination of the optical portion 110 when the inserted intraocular lens 100 is pushed out by the plunger 12. The convex portion 22f is located at The convex portion 22f is arranged on the front side of the optical axis L of the optical portion 110 and on the side where the front support portion 112A is not arranged when viewed from the extrusion axis Lp. It protrudes in a mountain-like shape toward the ceiling surface 22b, is close to the outer peripheral portion of the optical portion 110 on the rear optical surface 110b side, and is fillet-processed to have a rounded tip. The convex portion 22f can suppress the inclination of the optical portion 110 when the intraocular lens 100 is pushed out by the plunger 12, and prevents the anterior support portion 112A of the intraocular lens 100 from being unintentionally tucked. It is possible to suppress the occurrence of "tacking state". In addition, deformation such as unintended turning-up of the optical portion 110 can be suppressed.

Although the embodiments of the present disclosure have been described above, the intraocular lens insertion device of the present disclosure is not limited to the above embodiments, and can be implemented in various other forms.

1 Injector (intraocular lens insertion device)
10 Insertion instrument main body 12 Plunger 20 Insertion portion 20a Tip 20b Passage 20c Inner wall surface 20e Bottom surface 24a First inner wall surface 24b Second inner wall surface 22 Storage unit 22b Ceiling surface 22c Bottom surface 22d Right inner wall 22e Left inner wall 22f Protruding portion 31 1 pin 32 2nd pin 33 3rd pin 41 1st restricting portion 42 2nd restricting portion 43 3rd restricting portion 50 canopy 52 slope 100 intraocular lens 110 optical portion 110a outer peripheral portion (rim)
110b rear optical surface 110c front optical surface 112A front support portion 114A connection portion 116A base portion 118A tip portion 112B rear support portion 114B connection portion 116B base portion 118B tip portion L optical axis Lp extrusion axis Lt central axis S1 first gap S2 second Gap S3 Third gap Vs Virtual plane

Claims (5)

An intraocular lens having a disk-shaped optic and a pair of support portions extending radially outward from the outer peripheral portion of the optic is stored in advance on an extrusion shaft inside a cylindrical main body, and the eye is stored. An intraocular lens insertion device for inserting the intraocular lens into the patient's eye by pushing out the intraocular lens from the proximal side to the distal side along the pushing shaft with a rod-shaped plunger,
The tubular body is
The intraocular lens is stored so that the anterior support part, which is one support part, is arranged on the distal side of the optical part, and the posterior support part, which is the other support part, is arranged on the proximal side of the optical part. a storage unit;
A first regulating part provided in the storage part for restricting movement of a peripheral edge of the optical part of the intraocular lens stored in the storage part, which is the farthest from the extrusion axis, in a direction parallel to the optical axis. and
The first restricting portion is a side on which the base of the rear support portion is not arranged among inner walls of the storage portion facing in a direction intersecting the extrusion axis in the in-plane direction of the optical surface of the optical portion. It is configured in a brim shape extending from the inner wall side to a position facing a part of the front optical surface in the optical section,
Between the first restricting portion and a ceiling inner wall facing the front optical surface among the inner walls of the storage portion, there is a first first through which the tip of the rear support portion deformed to face the front optical surface can pass. An intraocular lens insertion device provided with a gap. The intraocular lens insertion device according to claim 1,
a second restricting part that restricts movement of a peripheral edge of the optical part of the intraocular lens stored in the storage part on the proximal end side of the extrusion shaft in a direction parallel to the optical axis;
The second restricting portion has a flange shape extending in the in-plane direction of the optical surface of the optical portion from the base end side of the extrusion shaft to a position facing a portion of the front optical surface,
An intraocular lens insertion device, wherein a second gap is provided between the second restricting part and the ceiling inner wall, through which the tip of the rear supporting part deformed to face the front optical surface can pass. The intraocular lens insertion device according to claim 2,
The intraocular lens insertion device, wherein each of the first restricting portion and the second restricting portion is connected to extend in the circumferential direction of the optical portion while maintaining a flange shape. The intraocular lens insertion device according to any one of claims 1 to 3,
The said 1st control part is an intraocular-lens insertion instrument arrange|positioned at the base end side of the said extrusion axis|shaft rather than the imaginary plane which orthogonally crosses the said extrusion axis|shaft and contains the said optical axis. The intraocular lens insertion device according to claim 3 or claim 4,
A slope is formed in the first restricting portion and the second restricting portion that are connected to each other to allow the rear supporting portion to slide while the front end of the rear supporting portion is deformed to a position facing the front optical surface. intraocular lens insertion device.

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