JPH11137592A - Plug for anterior capsule of lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug for the anterior capsule of the lens that facilitates the injection of a filler by preventing problems from arising therefrom by keeping load from acting on the ocular tissue, a tube or a plug member, and keeping the tube from bending when inserted into the eye while inserted into the eye or mounted on an incision of the anterior capsule of the lens. SOLUTION: In an anterior capsule plug 10 comprising a tube 12 to inject a light transmitting filler into the capsule of the lens and a plug member 14 that is mounted in a manner of blocking the incision of the anterior capsule, the tube 12 is penetrated into the plug member 14 at an angle of 1 to 45 degrees and fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anterior capsulotomy, in which the contents of the lens become cloudy due to cataracts (nuclei, cortex, epithelial cells, etc)
After aspiration is removed, it is a so-called anterior capsule plug, which is an ophthalmic surgical tool for injecting a predetermined filling into the lens capsule from the incision, specifically, through a tube to have a lens function. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anterior capsule plug for preventing the capsular bag from filling out of the capsular bag at the time of and after the filling of the capsular bag with a filling material such as silicone gel.

[0002]

2. Description of the Related Art Conventionally, for the treatment of cataracts and the like, the contents of the lens (eg, nucleus, cortex, epithelial cells, etc.) have been removed by surgery, while an intraocular lens has been inserted into the eye or the lens has been removed. A technique of using a sac and injecting a light-transmitting filler into the sac has been adopted. Among them, the latter technique of injecting a predetermined filling material into the capsular bag does not have the problem of fixation in the eye and the problem of movement of the lens during wearing as in the case of an intraocular lens. It is known that there are advantages such as a small opening at the time.

In the method of injecting a filling material into the capsular bag, an anterior capsulotomy is first performed, a predetermined incision is formed in the anterior capsular portion of the capsular bag, and then an ultrasonic tip or the like is used. From the incision provided in the anterior capsule portion of the lens while leaving the anterior capsule portion of the lens, the contents of the opaque lens due to cataracts, such as nuclei, cortex, epithelial cells, etc., are aspirated and removed from the capsule, and thereafter Through the incision
The filling will be injected, and during or after such filling, the filling will flow out through such an incision in the anterior capsule.

[0004] For this reason, various measures have been taken to prevent such a filling material from flowing out of the capsule, for example, "OCULAR SURGERY NEWS", vol. 14, No. 20,
In p38-39 (October 15, 1996) and the like, an anterior capsule plug composed of a plug member attached to an incision provided in an anterior capsule part and a tube provided so as to penetrate it is proposed. A predetermined filling material is injected into the capsule through the tube of the anterior capsule, and after the injection, the tube is cut so as not to be obstructed in the eye. By closing the opening, it is possible to prevent the outflow of the filling material from the incision.

[0005] However, such a conventional anterior capsule plug has a structure in which a tube is made to penetrate in a state substantially perpendicular to or slightly inclined with respect to a disc-shaped plug member. When the anterior capsule plug is inserted into the eye and attached to the incision of the anterior capsule, there is a problem that the eye tissue, tube, and plug member are overloaded, thereby damaging the eye tissue or deforming the plug member. There were problems that the incision could not be sufficiently closed, and that filling of the filling material through the tube became difficult. In particular, since the injection of the filling is performed by inserting the needle of the syringe into the hollow portion of the tube, the operation of injecting such a filling is extremely difficult due to the bending of the tube due to the load described above. It becomes.

[0006]

The present invention has been made in view of the above circumstances, and its main problem is to fix the state of insertion into the eye or the state of attachment to the incision of the anterior capsule. An object of the present invention is to provide an anterior capsular plug in which a load is not applied to ocular tissue, a tube, and a plug member, and which completely eliminates the problems caused by the load. An object of the present invention is to provide an anterior capsular plug in which the tube is not bent when inserted into the plug, and the filling operation can be easily performed.

[0007]

According to the present invention, in order to solve the above-mentioned problems, light transmission is performed into an empty capsular bag in which contents are taken out from an incision formed in an anterior capsule incision and become empty. A tube for injecting a filling material, a plug member fixed to the tube so that the distal end portion of the tube can penetrate, and fitted and attached to the incision so as to close the incision. Wherein the tube is penetrated and fixed to the plug member in a form in which the tube is inclined at an angle of 1 to 45 degrees with respect to a reference plane of the plug member. The anterior capsule plug is the gist of the invention.

As described above, in the anterior capsule plug according to the present invention, the angle of arrangement of the conventional tube is significantly different.
The tube is disposed in a slanted configuration at an extremely small angle, less than or equal to 45 degrees, with respect to the plug member, thereby providing a tube at a predetermined location of the sclera generally located around the cornea. Through the incision, the anterior capsule plug inserted into the eye can be further effectively matched with the incision formed in the anterior capsule part of the lens capsule, and thus the anterior capsule plug is inserted. Even if the plug member is fitted and attached to the incision in the anterior capsule, the peripheral portion of the incision will not be loaded and will not adversely affect the ocular tissue. There is no adverse effect on the closure structure of the incision, nor on the bending of the tube, and therefore on the filling operation through such a tube. Also, it became a fact that can be effectively eliminated.

According to one preferred embodiment of such an anterior capsule plug according to the present invention, the backflow of the filling material injected through the hollow portion of the tube is prevented, and the outflow of the filling material is prevented. A stop means is provided in the hollow part of the tube, whereby the outflow of the packing through the hollow part of the tube to the outside is effectively prevented.

According to another preferred embodiment of the anterior capsule plug according to the present invention, a protrusion extending laterally is integrally provided on an outer peripheral portion of the plug member, and guide by the protrusion is provided. Below, the plug member is adapted to be fitted into the incision. The presence of such projections facilitates insertion and attachment of the anterior capsule plug into the incision, and also has the effect of preventing the plug member from coming off from the incision, and is firmly fixed to the capsule. It is possible to do.

According to still another preferred embodiment of the anterior capsule plug of the present invention, a circumferential groove which opens laterally is formed over the entire outer circumference of the plug member. The plug member is attached by accommodating the peripheral portion of the incision in the groove. The stopper member can be fixed to the capsule by the presence of such a circumferential groove.

In the anterior capsule plug according to the present invention, preferably, a projection extending laterally is provided integrally on an outer peripheral portion of the plug member, and extends over the entire periphery of the outer peripheral portion. A peripheral groove that opens to the side is formed, and the protrusion is positioned closer to the distal end of the tube than the peripheral groove, so that when the plug member is attached, the cutout is formed in the peripheral groove. The protrusion is positioned within the capsular bag while the peripheral portion is accommodated, and the fixation to the capsular bag can be further strengthened by adopting such a configuration. .

In the anterior capsule plug according to the present invention as described above, preferably, the outer peripheral portions of the plug members located on both sides of the circumferential groove in the tube penetration direction are connected to the distal end of the tube. In this case, the outer peripheral portion of the plug member having a larger planar shape at the distal end side of the tube is inserted and positioned in the capsule through the anterior capsule incision, whereby the plug member is formed. Is effectively fixed, so that its attachment to the capsular bag can be performed more effectively.

The projection provided on the plug member is
It is desirable that the tube is deviated by a predetermined angle from the direction in which the tube extends in the plan projection view around the penetrating portion of the tube. Because there is no influence of
The angle will be in the range of 60 to 120 degrees.

[0015] Preferably, the peripheral groove is
It is desirable that the plug member is formed with a V-groove structure, whereby the fixing of the plug member to the periphery of the incision can be more advantageously achieved.

Further, in the anterior capsule plug according to the present invention, it is desirable that the plug member is formed of a soft material, thereby facilitating insertion of the anterior capsule plug (plug member) into the eye. Can be done.

In addition, according to the present invention, the plug member is
It is also possible to comprise a plate-like member and a gel interposed between the plate-like members, and the tube is inclined with respect to the two plate-like members by an inclination angle defined by the present invention. The anterior capsule plug is formed by being penetrated and fixed by the above.

In the present invention, a projection extending laterally is integrally provided on an outer peripheral portion of one of the two plate-like members of the plug member which is located on the tube tip side. When the plug member is attached, the plate member provided with the projection is positioned in the capsular bag.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, in order to clarify the present invention more specifically, the present invention will be described in more detail with reference to the drawings.

First, FIGS. 1A and 1B show an example of an anterior capsule plug according to the present invention, in which an anterior capsule plug 10 includes a tube 12 having a predetermined length and a disc-shaped plug. And the plug member 14 is integrally assembled. In the anterior capsule plug 10 having such a configuration, the tube 12 functions as a guide for inserting a needle of a syringe for injecting a predetermined filler into the lens capsule, and is formed by an anterior capsule incision. The contents of the lens, for example, the nucleus, cortex, epithelial cells, etc. are taken out from the incision, and a predetermined filling material is inserted into the empty capsular bag of the syringe in which the hollow portion of the tube 12 is inserted. It is intended to be injected through a needle, and after injection, is detached from the plug member 14 so that the tube 12 does not come into contact with the corneal endothelium or iris. The plug member 14 is fitted and attached to the incision so as to close the incision provided in the anterior capsule portion, and serves as a plug for the incision at the time of injection of the filling material and after the injection. It works.

By the way, the anterior capsule plug 1 having the above-described configuration is used.
In FIG. 1B, the tube 12 has a distal end portion penetrating through the center of the plug member 14 as shown in FIG. Te, predetermined inclination angle: in a state of being brought into inclined at theta _1, is fixed therein assembled integrally to such plug member 14. In the present invention, the inclination angle of the tube 12 with respect to the plug member 14 is ₁ to 45 degrees, preferably 10 to 35 degrees, and thus the anterior capsule plug 10 is used.
When inserting into the eye, the load is not applied to the eye tissue, the tube 12, and the plug member 14, thereby avoiding the occurrence of the problem, and the tube 12 is not bent, so that the filling operation is performed. It was extremely easy. Incidentally, such a tilt angle: theta ₁ is greater than 45 degrees, as in the prior art, the tube 12 is a plug member 1
4 or an inclined state close to it, the eye tissue or the tube (1) is inserted into the eye.
2) A large load is applied to the plug member (14), and the tube (12) is bent, making the filling operation difficult.

Further, a gel-like substance 16 is packed in the hollow portion of the tube 12, whereby
A gel stopper is provided as a check means. That is, the gel-like substance 16 packed in the hollow portion of the tube 12
Is a silicone gel-like material or an acrylic gel-like material, while allowing the insertion of a needle of a syringe for injecting the filling, while filling the gap between such a needle and the inner surface of the hollow part, and injecting. In addition to preventing the leakage (outflow) of the filled material, after the needle of such a syringe is withdrawn, the inside of the hollow portion of the tube 12 is closed, thereby performing a plug function. The injected filling is prevented from flowing out. In this sense,
The gel-like substance 16 is desirably filled so as to be present in at least the hollow portion of the tube 12 at the portion where the plug member 14 penetrates.

It is desirable that the tube 12 be soft (flexible) in order to be easily inserted into the eye. However, even if the tube 12 is made of a soft material, it is hard. Even if it is a material, there is no problem at all, and it is appropriately selected from known materials. When the tube 12 is formed by using a hard material, the tube 12 is configured to be soft by processing it as a thin tube.

On the other hand, the plug member 14 integrally fixed to the distal end portion of the tube 12 has a structure as shown in FIG.
Here, it has a disk shape and has a large-diameter portion 14a and a small-diameter portion 14b, between which a circumferential groove 18 of a V-groove structure extends over the entire outer circumference. It is formed so as to open to the side. And, as shown in the figure, the disc-shaped plug member 14 is
Is located on the distal end side of the tube 12, in other words, the distal end portion of the tube 12 is penetrated so that the large-diameter portion 14a having a larger planar shape than the small-diameter portion 14b is on the distal end side of the tube 12, They are fixed together.

Then, the plug member 14 can be fixed to the capsular bag by fitting the peripheral edge of the anterior capsule incision into such a peripheral groove 18 and housing it. In this sense, the shape of the circumferential groove 18 is desirably a V-groove structure having an acute angle.
Thus, the strength of the plug member can be maintained, and the plug member can be easily fitted.

The plug member 14 is integrally provided with a tongue-like projection 20 extending radially outward, that is, laterally, on the outer periphery of the large diameter portion 14a. The presence of the projection 20 allows the plug member 14 to be inserted into the capsule,
In addition to being easy to fit into the periphery of the incision,
The effect of firmly fixing the lens to the capsular bag, that is, the effect of preventing the plug member 14 from coming off can be effectively exerted. In order to effectively exhibit such an effect, it is desirable that the projection 20 be provided on the distal end side of the tube 12 with respect to the circumferential groove 18, here, on the outer peripheral portion of the large diameter portion 14a. It is preferable that the angle is shifted by a predetermined angle with respect to the extending direction of the tube 12 in the plan projection view around the plug member 14 penetrating portion of the tube 12, and in particular, there is no influence on the ease of insertion and the optical area. Therefore, the deviation angle θ ₂ is 60 to 60 on both the left and right sides with respect to the direction in which the tube 12 extends.
It is within a range of 120 degrees. Incidentally, such an angle: the the theta ₂ was left 60 to 120 degrees, depending on the type of dominant arm of the user (physician) (right and left) the front using a capsule plug 10, with respect to the direction the projections 20 of extension of the tube 12 This is because they are arranged symmetrically.

As a material for forming such a plug member 14, a soft material is preferably used in order to facilitate its insertion. For example, silicone rubber and acrylic rubber will be advantageously used, but in addition, elastomers such as polyurethane, segmented polyurethane, block or graft copolymer of polysiloxane and polyurethane, and fluororubber will also be advantageously used. Becomes

The plug member 14 used here has a flat disk shape. However, the plug member 14 may have a curved shape such as an arc shape or a spherical shape. In this case, the reference plane of the plug member 14 is, as shown in FIG. 2A, a surface (tangential line exists) that comes into contact with the plug member 14 at the portion where the tube 12 penetrates. respect, the tube 12 is a predetermined angle: so as to be inclined in theta _1, so that the provided assembled integrally with the plug member 14.

In the anterior capsule plug 10 of the above example,
A gel plug was configured as a non-return means for filling the gel-like substance 16 in the hollow portion of the tube 12 to prevent backflow of the injected filling material and to prevent the outflow of the filling material. Therefore, various known check valves such as an umbrella type and a duckbill type can be provided in the tube 12, and in this case, the check valve 22 is provided as shown in FIG.
It is provided in the hollow portion of the tube 12 or shown in FIG.
Is provided at the distal end of the tube 12 as shown in FIG. In any case, the operation of injecting the filler through the hollow portion of the tube 12 is allowed, but the gel stopper described above may be used as long as it has a function of preventing the injected filler from flowing out (leakage) to the outside. Even if something other than a check valve is used, it can be used as a check means. As the gel substance 16 constituting the gel stopper, various known substances are used. For example, a gel substance shown in JP-A-4-224746 or the like can be appropriately selected and used. Become.

Further, the tube 12 and the plug member 14 are
Although the anterior capsule plug 10 of the above example is configured as a separate body, the same material may be used and configured as an integral body without any problem.

In the present invention, the anterior capsule plug 10 having the structure shown in FIGS. 3A and 3B can also be advantageously used. In this case, the plug member 14 of the anterior capsule plug 10 has a small disk-shaped upper plate 24 having a small planar shape, a large-diameter disk-shaped lower plate 26 having a planar shape larger than the upper plate 24, And a gel-like substance 28 interposed between the upper and lower plates 24, 26,
And through their two upper and lower plates 24, 26, a predetermined inclination angle: with the theta _1, is the front end portion of the tube 12 is caused to fixed. And this plug member 14
A tongue-shaped projection 20 extending outward in the radial direction is provided on the outer peripheral portion of the lower plate 26 with a predetermined displacement angle: θ ₂ on the opposite side to the example shown in FIG. , Are formed integrally.

In order to set the anterior capsule plug 10 according to the present invention on the lens capsule as described above, first, the anterior capsule incision is made through an incision provided at a predetermined site of the sclera located around the cornea. For example, Continuous Circular
Capsulorhexis), as shown in FIG.
An incision 32 of about 2 mmφ is formed in the vicinity of the equator of the lens at 12 o'clock, so as not to damage the iris 30 and the like. Then, as shown in FIG. It is inserted through the incision 38 provided in the surrounding haptic region and the incision 32 in the anterior capsule, and by the action of ultrasound, the lens content 42, specifically the nucleus, cortex, After removing epithelial cells and the like by suction, FIG.
As shown in (c), only the capsular bag 40 is left, and the content is empty.

Next, as shown in FIG.
The anterior capsule plug 10 according to the present invention is provided with a plug member 14 at its distal end.
Is inserted through the incision 38 of the cornea 36 (the sclera), and further, the incision 3 provided in the anterior capsule region of the lens capsule 40.
2 will be fitted. When the projection 20 is provided on the plug member 14 of the anterior capsule plug 10 at the time of this fitting, the plug member 14 is inserted into the incision 32 through the projection 20 and the plug member 14 is turned relatively to the incision 32. By moving the plug member 14 so as to move,
The large-diameter portion on the distal end side of the incision 32 is located in the capsular bag, so that the peripheral edge of the incision 32 enters and is accommodated in the peripheral groove 18, whereby the incision 32 by the plug member 14 is formed. Is completed. At this time, the anterior capsule plug 10 according to the present invention is inserted into the anterior capsule 38 from the corneal incision 38 because the tube 12 is provided at an inclination angle θ ₁ of 45 degrees or less with respect to the plug member 14. The plug 10 is set in a natural form and does not generate a large load or stress.

On the other hand, as shown in FIG. 5, in the anterior capsule plug 10 'in which the tube 12' is provided at an angle (θ ₁ ) close to 90 degrees with respect to the plug member 14 ', When the plug member 14 'is attached to the incision 32' of the capsular bag 40 ', the capsular tissue surrounding the incision, the plug member 14'
And the tube 12 'itself is subjected to a load or stress, and the bending of the tube 12'
The tissue surrounding the incision 38 'of the cornea 36' can also be loaded or stressed.

The anterior capsule plug 10 according to the present invention
After being set in the incision 32 of the capsular bag 40, the needle 46 of the syringe 44 for injecting a predetermined filling is inserted into the tube of the anterior capsule plug 10, as shown in FIG. Then, the filler 48 is injected from the syringe 44 so that the inside of the capsular bag 40 is filled with the filler 48. Further, when the injection of the filling 48 is completed, the needle 46 of the syringe 44 is withdrawn from the tube 12, and the tube 12 is inserted into the endothelium of the cornea 36 or the iris 30.
The corneal incision 38 is sewn up while being cut as short as possible so as not to come into contact with the like, so that the operation is completed as shown in FIG. 4 (f). It is.

Here, the capsular bag 4 from the syringe 44 is
Any known material can be used as the filler 48 to be injected into the tube 0, as long as it is a light-transmitting material. For example, a silicone gel, a collagen gel, a hydrogel, an elastomer, a soft Rubber and the like are used.
Injections described in, for example, JP-A-224746 can be used in the same manner.

Although the above has been a detailed description of a typical example of the anterior capsule plug according to the present invention, it is needless to say that the present invention is not limited by such description. It should be understood that various changes, modifications, improvements, and the like can be made to the present invention based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

[0038]

EXAMPLES Further, some examples of the present invention will be shown below to clarify the excellent effects of the present invention.

Example 1 First, an anterior capsule plug (10) having a structure as shown in FIG. 1 was produced. As the tube (12), a silicone tube, the inclination angle: theta as ₁ becomes 30 degrees, mounted inclined with respect to the silicone disk Josen member (14). In addition, the plug member (14) has a gap between the large diameter portion (14a) and the small diameter portion (14b).
With 5 degree angle of acute-angled circumferential groove (18) is provided, the deviation angle to the direction of extension of the tube (12): theta ₂ is provided with 90 degrees of tongue (20) I have. Furthermore, inside the tube (12),
A check valve is provided.

Then, an anterior capsule incision is made in the rabbit eye, and the contents (nucleus, cortex, epithelial cells, etc.) of the lens are aspirated and removed through the formed incision. When 10) was inserted into the incision in the anterior capsule and mounted, it was easy to insert and mount the anterior capsule plug.

Next, a predetermined filling material (silicone sol) was injected into the sac through the needle (12) of the syringe through the tube (12) of the anterior capsule plug (10). As a result, the filling of the filling material was easy. There was no leakage of the packing. After the filling was completed, the needle of the syringe was pulled out, and the tube (12) was cut from the vicinity of the plug member (14). When the rabbit eyes were observed after the operation, the anterior capsule plug (10) was fixed to the capsule, and the silicone sol was gel-like due to cross-linking polymerization due to body temperature. No leakage was found.

Example 2 An operation on a rabbit eye was performed in the same manner as in Example 1 except that the angle of inclination of the tube (12) with respect to the plug member (14) was 15 degrees. As a result, the same result as in Example 1 was obtained.

Example 3 An operation on a rabbit eye was performed in the same manner as in Example 1 using the anterior capsule plug (10) having the structure shown in FIG.
The two plates (24, 2 and 2) constituting the plug member (14)
6) is a silicone plate, and a gel-like substance (2) interposed between the two plates.
As 8), a silicone gel material was used. Further, as a non-return means, a gel stopper was formed by packing the silicone gel-like material (16) in the tube (12). The results were the same as in Example 1.

Comparative Example 1 The angle θ ₁ between the tube (12) and the plug member (14) was 9
Except for using the anterior capsule plug (10) at 0 °, the operation was performed on the rabbit eye in the same manner as in Example 1, and it was difficult to insert and attach the anterior capsule plug. It was also found that the filling was difficult, and that there was leakage of the filling.

[0045]

As is apparent from the above description, in the anterior capsule plug according to the present invention, since the tube is provided at an inclination angle of 1 to 45 degrees with respect to the plug member, the tube is inserted into the capsular bag. At the time of insertion and further thereafter, it is possible to effectively prevent the load on the eye tissue, the tube, and the plug member, and since the tube does not bend when inserted into the eye, It exhibits the feature that the operation of injecting the material becomes easy.

In the anterior capsule plug according to the present invention, when the plug member is provided with a projection, in addition to facilitating insertion into the lens capsule, the plug member can be firmly fixed to the capsule. The effect of preventing the plug member from coming off is exerted, and furthermore, by providing a peripheral groove in the outer peripheral portion of the plug member, the plug member can be firmly fixed to the capsule, and the plug member can be further fixed to two plates. Even if it is made of a gel-like member and a gel present between them, there is an advantage that it can be effectively fixed to the capsular bag.

[Brief description of the drawings]

1 shows an example of an anterior capsule plug according to the present invention, wherein (a) is a plan view thereof, and (b) is A in (a).
FIG.

FIGS. 2A and 2B show another example of the configuration of the anterior capsule plug according to the present invention, wherein FIG. 2A is an explanatory view showing the inclination angle of the tube when the plug member has a curved shape, and FIG. (C) is a cross-sectional explanatory view showing different examples of the check valve provided on the tube.

FIGS. 3A and 3B show another example of the anterior capsule plug according to the present invention, wherein FIG. 3A is a plan view thereof, and FIG.

FIG. 4 is a process explanatory view showing an example of a surgical method using the anterior capsule plug according to the present invention.

FIG. 5 is an explanatory view corresponding to FIG. 4 (b), showing a mounting state of the anterior capsule plug in an operation using a conventional anterior capsule plug.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Anterior capsule plug 12 Tube 14 Plug member 16, 28 Gel substance 18 Circumferential groove 20 Projection 22 Check valve 24 Upper plate 26 Lower plate 30 Iris 32 Incision opening 34 Ultrasonic chip 36 Cornea 38 Incision part 40 Capsule 42 Lens lens Contents 44 Syringe 46 Needle 48 Filler

Claims (11)

[Claims] 1. A tube for injecting a light-transmitting filler into an empty capsular sac from which contents have been taken out through an incision formed by an anterior capsule incision, and a distal end portion of the tube. A plug member that is fixed to the tube in a penetrating form and that is fitted and attached to the incision so as to close the incision; 1-4 with respect to the reference plane
An anterior capsule plug which is penetrated and fixed to the plug member in a form inclined at an angle of 5 degrees. 2. The anterior capsule plug according to claim 1, wherein the tube is provided with a check means for preventing backflow of the filling material injected through the hollow portion of the tube and preventing outflow of the filling material. . 3. A projection extending laterally is provided integrally on an outer peripheral portion of the plug member, and the plug member is fitted into the incision under the guidance of the projection. An anterior capsule plug according to claim 1 or 2. 4. A peripheral groove that opens laterally is formed around the entire outer peripheral portion of the plug member, and the peripheral edge of the incision is accommodated in the peripheral groove, thereby forming the plug. The anterior capsule plug according to any one of claims 1 to 3, wherein the member is fitted therein. 5. A projection extending laterally is integrally provided on an outer peripheral portion of the plug member, and a circumferential groove that opens laterally is formed over the entire periphery of the outer peripheral portion. Along with
The protrusion is positioned closer to the distal end of the tube than the circumferential groove, so that when the plug member is fitted, the peripheral edge of the incision is accommodated in the circumferential groove, while the protrusion is the lens. 2. The method according to claim 1, wherein the sac is located within the sac.
Or the anterior capsule plug according to claim 2. 6. The outer peripheral portion of the plug member located on both sides of the peripheral groove in the direction in which the tube penetrates has a planar shape larger on the distal end side of the tube than on the tube base side. An anterior capsule plug according to claim 4 or claim 5. 7. The projection according to claim 1, wherein the projection is provided at an angle of 60 to 120 degrees left and right with respect to a direction in which the tube extends in a plan projection view with respect to a through portion of the tube. The anterior capsule plug according to any one of the above. 8. The anterior capsule plug according to claim 1, wherein the peripheral groove has a V-groove structure. 9. The anterior capsule plug according to claim 1, wherein the plug member is formed of a soft material. 10. The anterior capsule according to claim 1, wherein the plug member is composed of two plate members and a gel interposed between the plate members. plug. 11. A projection which extends laterally is provided integrally on an outer peripheral portion of one of the two plate-like members of the plug member which is located on the distal end side of the tube, and is provided at the time of fitting of the plug member. 11. The anterior capsule plug according to claim 10, wherein the plate-like member provided with the projection is positioned in the capsular bag.