JP2011072349A - Phakic intraocular lens and phakic intraocular lens insertion instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a phakic intraocular lens and a phakic intraocular lens insertion instrument, for lightening burden on a patient and efficiently placing an intraocular lens on the iris. <P>SOLUTION: The phakic intraocular lens of an iris hold type to be inserted in the eye by using the phakic intraocular lens insertion instrument having a plunger has: an optical portion which has a prescribed bending force and is foldable; and a support portion which is formed by a pair of arm portions of almost L shape which is bent in the way that tips as free ends face each other, fixes and holds the optical portion by putting the iris between pairs of the arm ends, and has an opening portion formed by inner peripheries of the pair of arm parts. The opening portion is large enough to store all the tip parts having brim parts formed at plunger tips. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an intraocular lens for a phakic lens and an intraocular lens insertion device for a phasic lens that are used by being installed in the eye for refractive power correction.

  Intraocular lenses for phakic lenses installed near the anterior chamber of the eye are known for the purpose of correcting refractive power for myopia, hyperopia, astigmatism, presbyopia, and the like. Such an intraocular lens for phakic lens is composed of a foldable optical part and a support part for fixing the iris, and the dynamic disturbance of the iris using the gripping force applied to the notch provided in the support part. There is known an intraocular lens for a phakic lens that sandwiches a part of the peripheral portion that is not affected by this and thereby holds the optical unit fixedly in the anterior chamber (see, for example, Patent Documents 1 and 2). In such an intraocular lens for phakic lens, the arrangement position is determined and fixed to the iris by the operation of the operator.

Special table 2003-533274 gazette JP 2007-325594 A

  However, the operation of holding the intraocular lens by the iris is difficult and burdens the surgeon. Moreover, it takes a burden for a patient that treatment takes time.

  In view of the above-described problems of the prior art, the present invention reduces the burden on the patient and allows the intraocular lens to be efficiently installed on the iris and the intraocular lens insertion device for the phakic body. The technical challenge is to provide

  In order to solve the above problems, the present invention is characterized by having the following configuration.

(1) An intraocular lens for an iris-holding phakic lens that is inserted into the eye using an intraocular lens insertion device having a plunger, and has an optical unit that can be bent with a predetermined refractive power; A support part that is formed by a pair of substantially L-shaped arms bent so that the distal ends that are free ends face each other, and that holds the optical part in the eye by sandwiching an iris between the distal ends of the pair of arms A support portion having an opening formed by an inner periphery of the pair of arm portions, and the opening accommodates all the tip portions having a flange portion formed at the tip of the plunger. It is characterized by having a possible size.
(2) In the intraocular lens for a crystalline lens according to (1), the opening has a release region wider than an axial length and a width of the distal end portion of the plunger.
(3) In the intraocular lens for a crystalline lens according to (2), a convex portion is provided at a free end of the pair of arm portions.
(4) A placement part for placing an intraocular lens for a phakic lens having a support part for gripping iris tissue and a foldable optical part, and the intraocular lens for phasic lens A placement portion having a placement surface that is narrower than the diameter of the optical portion to bend by applying a predetermined stress, and a plunger for pushing out the intraocular lens placed on the placement portion. A pusher means having a taper shape with a width increasing toward a base end from a contact surface in contact with the intraocular lens at a distal end of the plunger; And an extruding means having a tip portion in which a flange portion is formed at the boundary.

  ADVANTAGE OF THE INVENTION According to this invention, a patient's burden can be reduced and the intraocular lens for crystalline lenses can be installed efficiently.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of an iris-holding intraocular lens (Phakic IOL) 100 that is an embodiment of the present invention, FIG. 1 (a) is a front view, and FIG. 1 (b) is a side view. It is. The intraocular lens 100 includes an optical unit 110 having a predetermined refractive power and a pair of support units 120 for supporting the optical unit 110 in the eye.

  The optical unit 110 is a disk-shaped member, and includes a front surface 111 formed by an arbitrary combination of a concave surface, a convex surface, or a flat surface having a predetermined curvature according to required optical characteristics, and a rear surface 112. In the present embodiment, the optical unit 110 has a surface facing the cornea side as a front surface 111 and a surface facing the retina side as a rear surface 112.

The optical unit 110 of the present embodiment is a flexible intraocular lens that can be folded (folded) and has a repulsive force (restoring force) necessary for fixing the intraocular lens 100 in the anterior chamber. Formed from material. Such materials for soft intraocular lenses include, for example, known materials for soft intraocular lenses for phakic lenses such as simple substances such as HEMA (hydroxyethyl methacrylate), composite materials of acrylic acid ester and methacrylic acid ester, and the like. A soft intraocular lens material used as a lens replacement lens can be used.
The diameter D1 of the optical unit 110 is set based on the size of the pupil, and is preferably 4 mm or more and 8 mm or less.

  Two support portions 120 that are paired with respect to the optical axis O are formed on the periphery of the optical portion 110 so as to face each other. The support part 120 is formed of a material having a certain degree of elasticity, such as PMMA (polymethyl methacrylate), which is hard enough to hold the iris tissue. In this embodiment, the optical unit 110 and the support unit 120 are formed of different materials, but the present invention is not limited to this, and the optical unit and the support unit can be formed of the same material. is there.

  The structure of the support part 120 is demonstrated. The support part 120 includes a pair of arm parts 121a and 121b. One end of each of the arms 121a and 121b is connected to the optical unit 110, and the other ends are free ends 122a and 122b. The arm portions 121a and 121b have a substantially L-shaped shape in which the pair of arm portions 121a and 121b are bent in a direction facing each other at a predetermined distance from the center O of the optical unit 110. Further, the tips thereof face each other with a slight gap. Thereby, the pinching part 122 for pinching the iris tissue between the adjacent free ends 122a and 122b is formed.

The arms 121a and 121b are formed with a width (thickness) d required to have a restoring force (biasing force) for returning to the original shape. For example, the width d is 0.4 mm.
Thereby, when an iris is pinched by the pinching portion 122, the iris is suitably held by the restoring force of the arm portions 121a and 121b.

  Here, the free ends 122a and 122b are provided with convex portions 124. The convex portion 124 is provided by forming a notch by removing a part of the arm portions 121a and 121b (see FIG. 5B). When the intraocular lens 100 is attached to the iris, the convex portion 124 is pressed against the iris tissue IR, so that the iris is more appropriately gripped by the sandwiching portion 122.

  As described above, the outermost diameter (maximum total length) D2 of the intraocular lens 100 composed of the optical unit 110 and the support unit 120 is equal to that of the support unit 120 when the intraocular lens 100 is placed on the iris. It suffices if the tip (position of the sandwiching portion 122) is designed to have a length that is located outside the dynamic portion of the iris (the portion where the iris changes due to the miosis of the eye). In the present embodiment, the outer diameter D2 is formed to have a diameter of 7 mm or more and 11 mm or less. The diameter is more preferably 8 mm or more and 9 mm or less.

  Further, in the intraocular lens 100 for a crystalline lens according to the present embodiment, an opening 123 is formed by the inner circumferences of the arms 121 a and 121 b and the outer end surface 115 of the optical unit 110. The intraocular lens 100 can be inserted using an intraocular lens insertion device 1 to be described later, and when the intraocular lens 100 is pushed out, the distal end portion of an extrusion rod (hereinafter referred to as a plunger) 31 of the intraocular lens insertion device 1. 32 is positioned in the opening 123, and the intraocular lens 100 is moved in conjunction with the plunger 31 (see FIG. 5B). A detailed description of the relationship between the intraocular lens 100 and the intraocular lens insertion device 1 will be described later.

  The size of the opening 123 is determined by a combination of the outermost diameter D2 of the intraocular lens 100, the width d of the support 120, and the diameter of the optical unit 110, and further satisfies the following conditions. Things are a condition.

  First, the width w1 when viewed in a direction perpendicular to the axis passing through the two support portions 120 (plunger extrusion axis) is wider than the maximum width Wp of the distal end portion 32 of the plunger 31 described later. In addition, the restoring force by the arms 121a and 121b is maintained when the entire tip 32 is positioned in the opening 123 (the arms 121a and 121b are positioned by the tip 32 being positioned in the opening 123). The optical part 110 is formed so as not to be broken by being spread. For example, the width w1 is formed with a size of 0.8 mm to 2.0 mm. More preferably, it is formed with a size of 1.2 mm to 1.6 mm.

  Further, the length w2 of the plunger 31 in the direction of the extrusion axis in the opening 123 is formed to be longer than the length W2 of the tip 32 of the plunger 31. For example, the length w2 is formed to be longer than 1.35 mm.

  A method for forming the intraocular lens 100 having the above-described configuration will be briefly described. First, a material for forming the support part 120 is put into a predetermined mold and polymerized to form a disk-shaped bulk member having a circular recess at the center. Next, the material for forming the optical part 110 is placed in the concave part of the formed bulk member and polymerized. Then, the optical unit 110 and the support unit 120 are formed by cutting using a lathe or the like. Thereby, the intraocular lens 100 having a desired shape is obtained.

  Next, an intraocular lens insertion device 1 (injector) for inserting the intraocular lens 100 for a crystalline lens of the present embodiment into a patient's eye will be described. FIG. 2 is a schematic external view showing the external appearance of the phakic intraocular lens insertion device 1 used in the present embodiment. The intraocular lens insertion device 1 includes, in order from the side to be inserted into the eyeball, an insertion portion for insertion into an incision formed in the eyeball, and a lens holding portion provided with a placement portion for installing the intraocular lens 100 10 (hereinafter referred to as a cartridge), a cylindrical portion 20 for mounting the cartridge 10 at the tip, and a plunger that passes through the inside of the cylindrical portion 20, and the intraocular lens 100 from the tip of the cartridge 10 mounted on the cylindrical portion 20. And an extruding mechanism 30 for extruding to the outside.

  FIG. 3 shows a configuration diagram of the cartridge 10. 3A is a perspective view, and FIG. 3B is a state when the cartridge 10 is viewed from above. The cartridge 10 is integrally formed with an insertion portion 11 having a tapered shape whose diameter gradually decreases (thinner) toward the tip, and a placement portion 12 on which the intraocular lens 100 is installed. The cartridge 10 is entirely made of synthetic resin and is a disposable type that is discarded after one use.

  The folded intraocular lens 100 is sent out through the hollow portion of the insertion portion 11. The mounting portion 12 formed of the two halved members 12a and 12b can be opened and closed by connecting the lower edges of the halved members 12a and 12b with a hinge portion 13. Reference numerals 14 a and 14 b denote mounting tables provided on the half members 12 a and 12 b, respectively. is doing.

  When the half members 12a and 12b are closed, the wall surface shape (mounting surface shape) of the mounting table is deformed and substantially matches the proximal end opening shape (semicircular shape) of the insertion portion 11. In addition, the outer shape of the mounting portion 12 when the half members 12 a and 12 b are closed is substantially the same as the inner wall shape of the cylindrical portion 20. On the side surface of the half member 12a, a flat plate-shaped gripping portion 16 is provided that is gripped when the operator holds the cartridge 10. 15a and 15b are covers provided on each of the half members 12a and 12b so that when the half member 12a and the half member 12b are closed, the tops of the placement table 14a and the placement table 14b are covered. Is formed.

  The cartridge 10 having such a configuration includes the mounting table 14a and the mounting table in a state in which no stress is applied to the intraocular lens 100 when the mounting unit 12 is in the open state (the two halved members are separated). 14b, and then the cartridge 10 is mounted on the cylindrical portion 20, whereby the split member 12a and the half member 12b are closed, and the intraocular lens 100 is stressed and folded.

  FIG. 4 is a perspective view showing an external configuration of the cylindrical portion 20. A mounting portion 21 for attaching and detaching the cartridge 10 is provided at the tip of the cylindrical portion 20. The mounting portion 21 has a shape in which the distal end of the cylindrical portion 20 is substantially halved. A protruding portion 22 is inserted into the distal end of the mounting portion 21 and a concave portion 23 is inserted through the center of the cylindrical portion 20 at the proximal end (hereinafter referred to as a plunger). Each of them is formed symmetrically with respect to 31.

  The push-out mechanism unit 30 has a plunger 31 on the distal end side, and the plunger 31 further includes a distal end portion 32 and a shaft 33 (see FIG. 5B). The distal end portion 32 has a sufficiently wide width (maximum width Wp) with respect to the shaft 33 and has a tapered shape in which the width gradually decreases toward the contact surface p formed at the distal end. With such a shape, a flange portion 34 is formed at the boundary between the distal end portion 32 of the plunger 31 and the shaft 33 connected to the distal end portion 32. Note that the contact surface p is formed to have a size that allows the distal end portion 32 to be pushed in from a gap Δs described later. For example, the contact surface p is 2 mm.

  Here, an example is shown in which the entire circumference of the distal end portion 32 has a tapered shape (conical truncated cone shape) that narrows toward the distal end. However, the present invention is not limited to this, and the intraocular lens 100 is pushed out. A flange that has a tip width that allows the plunger 31 to be inserted from a gap formed at the tip of the support portion 120 during operation, and that can hook the tip of the support portion 120 when the inserted plunger 31 is pulled back. It only has to be formed. For example, a tapered shape in which only the width in the left-right direction with respect to the shaft 33 is gradually narrowed may be used.

  Furthermore, the width Wp of the contact surface p of the tip end portion 32 is formed to be narrower than the width w1 of the opening portion 123 as described above, and the length W2 of the tip end portion 32 is larger than the length w2 of the opening portion 123. Is also formed to be shorter.

  When the plunger 31 is pulled back to the operator side with the distal end portion 32 inserted into the opening 123 by the distal end portion 32 having the shape as described above, the buttocks on the free ends 122a and 122b of the arm portions 121a and 121b. Since 34 is caught, the intraocular lens 100 can be moved back and forth following the push / pull of the distal end portion 32 positioned at the opening 123. That is, when the distal end portion 32 of the plunger 31 is moved back and forth within the opening 123, the intraocular lens 100 is moved in the front-rear direction in conjunction with each other, so that the position of the intraocular lens 100 on the iris is changed. Fine adjustment can be easily performed.

  Next, the operation of the intraocular lens insertion device having the above configuration will be described. The operator sufficiently fills the insertion portion 11 and the mounting tables 14a and 14b of the cartridge 10 shown in FIG. 3 with a viscoelastic substance such as hyaluronic acid. The intraocular lens 100 is moved more smoothly by the viscoelastic substance.

  Next, the surgeon places the intraocular lens 100 on the placement tables 14a and 14b. At this time, as shown in FIG. 3B, the support portion 120 is arranged so that one side is on the insertion portion 11 side. While holding the gripping part 16 with one hand and holding the cartridge 10, the mounting part 12 (half member) is fitted into the concave part 23 provided in the mounting part 21 while the gripping part 16 (base end side) of the cartridge 10 is fitted. The bottom surfaces of 12a and 12b) are pressed against the convex portion 22 (or the left and right edges of the mounting portion 21). By pressing the bottom surface (lower part) of the mounting portion 12 against the convex portion 22 (or the left and right edge portions of the mounting portion 21), the convex portion 22 guides the half member 12a and the half member 12b to close together. It will be. When the mounting portion 12 is further pushed into the mounting portion 21, the cartridge 10 is mounted on the mounting portion 21 with the half member 12a and the half member 12b closed.

  FIG. 5 shows a schematic diagram of the intraocular lens 100 in the cartridge 10. FIG. 5A is an enlarged view of the inside of the cartridge 10, and FIG. 5B is an enlarged view of the vicinity of the rear end of the support portion 120 and the plunger 31. As shown in FIG. 5A, in the state where the half member 12a and the half member 12b are closed, the width (interval) between the placement table 14a and the placement table 14b is narrow. The intraocular lens 100 is pushed from the left and right directions on the wall surface. As a result, stress is applied to the intraocular lens 100, and the intraocular lens 100 is slightly bent along the wall surfaces (mounting surfaces) of the mounting tables 14a and 14b. Further, following the bending of the intraocular lens 100, the free ends 122a and 122b of the support part 120 are separated, and a gap Δs is formed in the sandwiching part 122.

  As described above, after the cartridge 10 is mounted on the mounting portion 21, the intraocular lens insertion device 1 is operated to perform the insertion operation of the intraocular lens 100. The plunger 31 of the extrusion mechanism 30 is moved toward the tip inside the cylindrical portion 20.

  FIG. 6 is an explanatory diagram of the positional relationship between the rear support 120 and the tip 32 of the plunger 31. As shown in FIG. 6A, when the gap Δs between the arm portion 121a and the arm portion 121b is pushed by the tip end portion 32 of the plunger 31, the gap Δs gradually increases due to the tapered shape of the tip portion 32. It is pushed out.

  When the plunger 31 is further pushed toward the optical unit 110, the entire tip 32 is positioned in the opening 123 beyond the positions of the free ends 122 a and 122 b of the support 120. At this time, the arm portion 121 a and the arm portion 121 b are brought close to each other by the restoring force of the support portion 120, whereby the gap Δs once widened is narrowed to the width of the shaft 33.

  As shown in FIG. 6B, when the plunger 31 is further pushed toward the optical unit 110, the contact surface p of the tip 32 is brought into contact with the outer end surface 115 of the optical unit 110. In this state, when the plunger 31 is further pressed, the intraocular lens 100 is moved to the insertion portion 11 side. As described above, since the inside of the insertion portion 11 is slippery, the intraocular lens 100 easily slides out from the insertion portion 11 into the eye, but the free ends 122 a and 122 b of the support portion 120. Thus, the hook 34 of the plunger 31 is caught and the intraocular lens 100 is prevented from slipping out.

  Further, when the plunger 32 is pulled toward the front (operator) side with the distal end portion 32 positioned at the opening portion 123, the collar portion 34 of the distal end portion 32 is moved to the free ends 122a and 122b of the arm portions 121a and 121b. Is caught, and the intraocular lens 100 is pulled to the near side in conjunction with the plunger 32. That is, the intraocular lens 100 is moved integrally with the plunger 31 in a state where the distal end portion 32 is positioned in the opening portion 123.

  After the intraocular lens 100 is advanced by a predetermined amount within the insertion portion 11, the distal end of the insertion portion 11 is inserted through an incision formed in the cornea of the patient's eye. When the plunger 31 is further pressed in a state where the distal end portion 32 is in contact with the intraocular lens 100 as shown in FIG. 6B, the intraocular lens 100 moves from the distal end of the cartridge 10 into the anterior chamber. It begins to be pushed out.

  FIG. 7 is an explanatory diagram of the state of the intraocular lens 100 in the anterior chamber. FIG. 7A shows a state in which only a part of the front side of the intraocular lens 100 is pushed out from the cartridge 10, and FIG. 7B shows a state in which most of the intraocular lens 100 is pushed out from the cartridge 10. As shown in FIG. 7A, when the intraocular lens 100 protrudes about half from the distal end of the insertion portion 11, the free ends 122a and 122b at the distal end of the front support portion 120 are in a separated state. In this state, the mounting position of the intraocular lens 100 is adjusted so that the intraocular lens 100 is positioned in a peripheral portion that avoids the influence of the dynamic disturbance of the iris.

  When the alignment of the front support portion 120 is completed, the operator pulls the tube portion 20 toward the front (operator) side while holding the push-out mechanism portion 30 so as not to change the position. As a result, the intraocular lens 100 is gradually moved from the cartridge 10 into the anterior chamber without changing the position of the front support 120. Note that the optical unit 110 is gradually opened by pushing the intraocular lens 100 into the anterior chamber.

  At this time, the front support 120 (arms 121a and 121b) tries to return to the original state in conjunction with the opening operation of the optical unit 110. In other words, while the optical unit 110 is bent, it has a predetermined gap, but when the optical unit 110 returns to its original shape, the free ends 122a and 122b are moved in directions closer to each other (stress is reduced). It will be in a state where it is not applied).

  FIG. 8 shows an explanatory diagram of the operation when the iris tissue IR is gripped by the sandwiching portion 122. In the state before the opening operation of the optical unit 110, as shown in FIG. 8A, the sandwiching portion 122 formed at the tip of the support unit 120 by the bending of the optical unit 110 is in an expanded state. In this state, when the optical part 110 is gradually opened, the pinching part 122 is closed following the behavior. Then, as shown in FIG. 8B, the arms 121a and 121b try to close by scraping the iris tissue IR from both sides. With this behavior, a part of the iris surface tissue is gripped by the sandwiching portion 122.

  Also, here, when the support part 120 tries to return to the original state, the convex part 124 formed on the free ends 122a and 122b bites into the iris tissue IR, so that the iris tissue IR is more suitably formed by the sandwiching part 122. Be gripped.

  When the iris tissue IR is gripped by the front support 120 as described above, the examiner then finely adjusts the position of the rear support 120 by operating the plunger 31. (At this time, the intraocular lens 100 and the cartridge 10 maintain a parallel positional relationship as shown in FIG. 7A).

  As described above, the intraocular lens 100 is formed such that the outermost shape D2 avoids the movable portion of the iris, so that the front support 120 is correctly mounted on the iris so that the rear side The support portion 120 is automatically placed at a position avoiding the movable portion of the iris.

  When the rear support 120 is aligned, the surgeon pulls the tube 20 toward the surgeon while holding the push-out mechanism 30. Thereby, the intraocular lens 100 is further opened in the anterior chamber. In addition, since most of the intraocular lens 100 is located in the anterior chamber, the range supported by the cartridge 10 is reduced, and the intraocular lens 100 is relatively free to move in the anterior chamber. That is, as shown in FIG. 7B, the intraocular lens 100 is supported with only the distal end of the plunger 31 as a base point, and the substantially parallel positional relationship between the rear support portion 120 and the plunger 31 is as follows. Disappear.

  In the state where the intraocular lens 100 and the plunger 31 are substantially parallel, the distal end portion 32 is caught by the rear support portion 120. However, when the intraocular lens 100 is opened, the intraocular lens 100 and the plunger 31 are engaged. When the front end portion 32 of the plunger 10 is arranged at a predetermined angle, the front end portion 32 of the plunger 10 is easily detached from the rear support portion 120.

  The injector 1 is completely removed from the intraocular lens 100 by further pulling the tube portion 20 toward the operator while holding the push-out mechanism portion 30. Further, by removing the distal end portion 32 of the plunger 31 from the rear support portion 120, the rear support portion 120 is interlocked with the behavior of the intraocular lens 100 being opened, like the front support portion 120. The iris tissue IR is gripped by the pinching portion 122 as the arm portions 121a and 121b try to close by the restoring force.

  As described above, the intraocular lens is easily fixed on the iris using the behavior when the intraocular lens is opened in the anterior chamber. Further, since the intraocular lens is moved in the front-rear direction by the operation of the injector, it is possible to easily perform alignment on the iris. As a result, the burden on the patient is reduced and the intraocular lens is efficiently installed on the iris.

  In addition, as what arranges an intraocular lens on an iris as mentioned above, it has a holding part for storing an intraocular lens for grasping an iris, and a holding part in which an intraocular lens is stored is an intraocular lens. The present invention can be applied to a preset type intraocular lens insertion device that is integrally attached to the insertion device.

  Furthermore, in this embodiment, although the example which attaches an intraocular lens to an insertion instrument main body using a cartridge was given, it does not restrict to this. For example, an intraocular lens insertion instrument configured such that an intraocular lens is installed directly on the insertion instrument body without a cartridge, and the intraocular lens is slightly bent at the position where the intraocular lens is pushed out to open the support portion tip. Also good. In the above description, an example in which two support portions are provided has been described. However, there may be three or more support portions. In this case, the support parts are arranged at equal intervals on the outer periphery of the optical part.

  In addition, the use of the intraocular lens and intraocular lens insertion device configured as described above is more convenient when inserting a toric lens. In this case, an incision is formed in the subject's eye along the astigmatic axis, and a lens is inserted from the incision so as to match the astigmatic axis. This eliminates the need for aligning the direction of the astigmatic axis of the intraocular lens in the eye, and makes it easier to install the intraocular lens in the eye using the behavior of opening the intraocular lens.

It is a schematic block diagram of an iris grasping type intraocular lens for a crystalline lens. It is the schematic external view which showed the external appearance of the intraocular lens insertion instrument for phakic lenses. It is a block diagram of a cartridge. It is the perspective view which showed the external appearance structure of the cylinder part. It is a schematic diagram of the intraocular lens in a cartridge. It is explanatory drawing of the positional relationship of a rear side support part and a front-end | tip part. It is explanatory drawing of the state of the intraocular lens in an anterior chamber. It is explanatory drawing of operation | movement when an iris structure | tissue is hold | gripped by a clamping part.

DESCRIPTION OF SYMBOLS 1 Intraocular lens insertion instrument 12 Placement part 30 Extrusion mechanism 31 Plunger 32 Tip part 34 Grow part 100 Intraocular lens 110 Optical part 120 Support part 121a, 121b Arm part 123 Opening part 124 Convex part

Claims (4)

An intraocular lens for an iris-grown lens that is inserted into the eye using an intraocular lens insertion device having a plunger,
An optical part that has a predetermined refractive power and can be bent;
A support part that is formed by a pair of substantially L-shaped arms bent so that the distal ends that are free ends face each other, and that holds the optical part in the eye by sandwiching an iris between the distal ends of the pair of arms A support portion having an opening formed by the inner periphery of the pair of arm portions,
The intraocular lens for a phakic lens, wherein the opening has a size capable of accommodating the entire distal end portion having a flange formed at the distal end of the plunger. The intraocular lens for a phakic lens according to claim 1, wherein the opening has a release area wider than an axial length and a width of the tip of the plunger. Inner lens. The intraocular lens for a crystalline lens according to claim 2, wherein a convex portion is provided at a free end of the pair of arms. A placement unit for placing an intraocular lens for a phakic lens having a support unit for gripping iris tissue and a foldable optical unit, the intraocular lens for a phakic lens being predetermined. A mounting part having a mounting surface that is narrower than the diameter of the optical part in order to bend by applying the stress of,
The push-out means having a plunger for pushing out the intraocular lens placed on the mounting portion, wherein the plunger has a distal end that is directed from a contact surface that is in contact with the intraocular lens toward a proximal end. Extrusion means having a tip portion in which a collar portion is formed at the boundary with the rear shaft portion by being formed into a tapered shape such that the width becomes wide,
An intraocular lens insertion device comprising:

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