JP2018198747A - Intraocular lens and intraocular lens insertion instrument - Google Patents

Abstract

To provide an intraocular lens including a support part that is prone to become a tucking state relative to a lens body in an intraocular lens insertion instrument, even when resistance of lubricant applied to a front support part is small.SOLUTION: The intraocular lens includes: a lens body having a prescribed refractive power; and two or more support parts for positioning the lens body in an eye, where the two or more support parts are joined with the lens body so as to clamp a center of an optical axis of the lens body. In a state where the intraocular lens is stored in the intraocular lens insertion instrument that has an intraocular lens push-out member for pressing the intraocular lens and pushing it out into an eye, when the intraocular lens is pressedly moved by the intraocular lens push-out member, a support part, out of the two or more support parts, disposed at a front side in a pushing direction of the intraocular lens with respect to the center of the optical axis of the lens body, comes into contact with a peripheral surface of a through-hole of the intraocular lens insertion instrument so as to be easily bent to the lens body side compared with the other support bodies.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an intraocular lens and an intraocular lens insertion device.

  Intraocular lenses that are inserted as a substitute for the crystalline lens to replace the human turbid crystalline lens and correct refraction in cataract treatment are in practical use. The intraocular lens includes a lens body (optical unit) having a predetermined refractive power and a support unit that maintains the position of the lens body in the eye. In intraocular lens insertion surgery in the treatment of cataracts, for example, a few millimeters of incision wound (incision) is provided at the edge of the cornea, cornea, etc. Removed. Then, a so-called viscoelastic substance is injected into the lens capsule, and the lens capsule is in an expanded state. The intraocular lens is then inserted and placed in the eye with an intraocular lens insertion instrument. When the placement of the intraocular lens is completed, the intraocular viscoelastic material is removed.

  Here, before the intraocular lens is moved in the intraocular lens insertion device, the extrusion operation is performed smoothly to prevent the intraocular lens from being damaged. Then, wet the passage where the intraocular lens moves with a lubricant. As a lubricant, a viscoelastic substance and a balanced salt solution (BSS) are generally used.

JP-T-2002-524136 JP 61-109562 A International Publication No. 2011/048631

  In the intraocular lens, in order to prevent the operability of the intraocular lens insertion device from being lowered when the intraocular lens insertion device is operated to push out the intraocular lens, the intraocular lens is supported by the eye during the extrusion process. There is an intraocular lens of a type in which a so-called front support portion, which is a support portion close to the tip of the inner lens insertion instrument, is deformed to the folded lens body side. However, when BSS or a relatively low-viscosity viscoelastic material is used as the lubricant, or when the amount of the viscoelastic material used is small, the action of the lubricant on the front support is small. The part may be ejected into the eye without being deformed to the lens body side.

  Further, when the intraocular lens moves in the intraocular lens insertion device, the base end portion of the front support portion comes into contact with the inner wall of the intraocular lens insertion device before the front end portion of the front support portion. There is a possibility that the front support part will be unintentionally deformed forward in the pushing direction and will not contact the inner wall of the intraocular lens insertion device, and the front support part will be ejected into the eye without being deformed to the lens body side. There is also. Alternatively, when setting the intraocular lens to the intraocular lens insertion instrument, if there is a gap between the proximal end of the front support part and the inner wall of the intraocular lens insertion instrument, the intraocular lens moves forward. The intraocular lens rotates in a direction in which the tip of the part moves away from the inner wall of the intraocular lens insertion device, so that the front support part does not contact the inner wall of the intraocular lens insertion instrument, and the front support part is on the lens body side. There is also a possibility of being injected into the eye without deformation.

When the intraocular lens is ejected into the eye with the front support portion extended, the front support portion is deformed to the lens body side, and the tip portion is included in the lens main body in a so-called tacking state. Unlike this, the intraocular lens is not normally emitted. For example, in an intraocular lens pushing device in which an intraocular lens is folded and inserted, the front support portion may protrude toward the cornea and damage the cornea, which may be difficult to fit in the lens capsule. On the other hand, in an intraocular lens push-out device that is inserted with the intraocular lens folded in a valley, the front support portion may protrude toward the lens capsule and damage the lens capsule. Furthermore, when the intraocular lens is moved to the standby position in the nozzle, the front support portion may protrude from the nozzle tip, making it difficult to insert the nozzle tip into the incision provided in the eyeball.

  Further, in the case where a so-called rear support portion, which is a support portion far from the tip of the intraocular lens insertion instrument, is extended among the support portions of the intraocular lens, the rear support portion is inserted to insert the rear support portion into the eye. As a result, the pushing amount of the pushing member of the intraocular lens such as the plunger is increased by the amount of extension, and as a result, the pushing member may damage the eye tissue. It may be possible to provide the intraocular lens insertion device with a structure that assists the deformation of the front support part, but when a low-viscosity material is used as a lubricant, the structure that assists the deformation of the front support part is small and uneven. Even the intraocular lens may be damaged.

  The technology of the present disclosure has been made in view of the above circumstances, and the purpose thereof is to provide a lens body in an intraocular lens insertion device even when the resistance of the lubricant to the front support portion is small. It is providing the intraocular lens which has a support part which tends to be in a tacking state.

  An intraocular lens according to the present disclosure is an intraocular lens having a lens body having a predetermined refractive power and two or more support portions for positioning the lens body in the eye, and presses the intraocular lens. In the state in which the intraocular lens is housed in the intraocular lens insertion device having the intraocular lens pushing member that pushes into the eye, the intraocular lens pushing member is more than the center of the optical axis of the lens body among the two or more support portions. When the intraocular lens is pushed by the intraocular lens pushing member, the support portion disposed on the front side of the intraocular lens in the pushing direction is more peripheral than the other support portion. In contact with the lens body and easily bent toward the lens body. Thereby, when the intraocular lens is moved in the intraocular lens insertion device, the so-called front support portion can be easily bent toward the lens body.

  Further, in the above intraocular lens, the above structure has a structure in which the length of the support portion disposed on the front side in the pushing direction of the intraocular lens with respect to the optical axis center of the lens body is longer than the lengths of the other support portions. It is good. Or said structure is good also as a structure which has the protrusion part which protrudes in the lens main body side in the front-end | tip of the support part arrange | positioned ahead of the optical axis center of a lens main body in the extrusion direction of an intraocular lens. Alternatively, in the above structure, the thickness of the support portion disposed in front of the center of the optical axis of the lens body in the pushing direction of the intraocular lens is predetermined from the tip of the support portion toward the joint portion with the lens body. It is good also as a structure thinner than the other part of this support part over length.

  Further, in the above structure, the width of the distal end portion of the support portion arranged on the front side in the pushing direction of the intraocular lens with respect to the optical axis center of the lens body on the plane perpendicular to the optical axis of the lens body is The structure may be narrower than the width of the other part of the support portion disposed on the front side in the extrusion direction, and may be structured such that at least one constriction is provided at the tip. In addition, in the above structure, in the state where the intraocular lens is housed in the intraocular lens insertion device, the base end portion of the support portion disposed on the front side in the pushing direction of the intraocular lens with respect to the optical axis center of the lens body is provided. The distal end of the support portion and the intraocular lens arranged on the front side in the pushing direction of the intraocular lens with respect to the distance between the distal end of the other support portion of the two or more support portions and the inner peripheral surface of the intraocular lens insertion device It is good also as a structure shifted with respect to the junction part with a lens main body so that the distance with the internal peripheral surface of an insertion instrument may become short.

Further, in the above structure, the width of the base end portion of the support portion disposed on the front side in the pushing direction of the intraocular lens with respect to the optical axis center of the lens main body in a plane perpendicular to the optical axis of the lens main body is 2 or more. It is good also as a structure wider than the width | variety of the base end part of the other support part among support parts. In addition, the above-described structure is such that the base end portion of the support portion disposed on the front side in the pushing direction of the intraocular lens with respect to the optical axis center of the lens body has another support portion disposed on the front side in the pushing direction of the intraocular lens. It is good also as a structure formed with the material harder than the part. Alternatively, in the above structure, the thickness of the support portion disposed in front of the lens body in the pushing direction of the intraocular lens with respect to the optical axis center of the lens body is predetermined from the joint portion with the lens body toward the tip. It is good also as a structure thicker than the other part of this support part over length.

  In the above structure, the base end portion of the support portion is formed of a hard material, or the base end portion of the support portion is made thicker than other portions, and the intraocular lens is housed in the intraocular lens insertion device. In the state, the base end portion of the support portion disposed in front of the lens body in the push-out direction of the intraocular lens is the tip of the base end portion of the other support portion of the two or more support portions and the eye The distance between the distal end of the support portion arranged on the front side in the pushing direction of the intraocular lens and the inner peripheral surface of the intraocular lens insertion device is longer than the distance from the inner peripheral surface of the inner lens insertion device. It is good also as a structure shifted with respect to the junction part with a lens main body. Furthermore, it is also possible to provide an intraocular lens insertion device in which the intraocular lens is stored in advance in the intraocular lens storage unit of the intraocular lens insertion device.

  According to the technology disclosed herein, there is provided an intraocular lens having a support portion that is likely to be tacked with respect to the lens body in the intraocular lens insertion device even when the resistance given to the front support portion by the lubricant is small. can do.

FIGS. 1A and 1B are diagrams illustrating an example of a configuration of an intraocular lens according to an embodiment. FIGS. 2A and 2B are diagrams illustrating an example of the configuration of an intraocular lens insertion device according to an embodiment. It is a figure which shows an example of a structure of the nozzle main body in one Embodiment. 4A and 4B are diagrams illustrating an example of the configuration of the positioning member in the embodiment. FIGS. 5A and 5B are diagrams illustrating an example of the configuration of the plunger in one embodiment. FIGS. 6A to 6C are diagrams illustrating an example of movement of the intraocular lens in the intraocular lens insertion device according to the embodiment. It is a figure which shows an example of the intraocular lens in the eye in one Embodiment. 8 (a) and 8 (b) are diagrams showing an example of the configuration of an intraocular lens in one modified example, and FIG. 8 (c) shows the movement of the intraocular lens in the intraocular lens insertion device. It is a figure which shows an example. 9 (a) and 9 (b) are diagrams showing an example of the configuration of an intraocular lens in a modification different from the modification shown in FIG. 8, and FIG. 9 (c) shows an intraocular lens insertion device. It is a figure which shows an example of the movement of the said intraocular lens in the inside. FIGS. 10A and 10B are diagrams illustrating an example of the configuration of the intraocular lens in a modification different from the modification illustrated in FIG. 9. FIGS. 11A and 11B are diagrams illustrating an example of the configuration of an intraocular lens in a modification different from the modification illustrated in FIG. 10. 12 (a) and 12 (b) are diagrams showing an example of the configuration of an intraocular lens in a modified example different from the modified example shown in FIG. 11, and FIG. 12 (c) shows an intraocular lens insertion device. It is a figure which shows an example of installation of the said intraocular lens in the inside. FIGS. 13A and 13B are diagrams showing an example of the configuration of an intraocular lens in a modification different from the modification shown in FIG. FIGS. 14A and 14B are diagrams showing an example of the configuration of an intraocular lens in a modification different from the modification shown in FIG. FIGS. 15A and 15B are diagrams showing an example of the configuration of an intraocular lens in a modification different from the modification shown in FIG. FIGS. 16A and 16B are diagrams showing an example of the configuration of an intraocular lens in a modification different from the modification shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1A and FIG. 1B show an example of the configuration of the intraocular lens 2 according to this embodiment. 1A is a plan view and FIG. 1B is a side view. Note that the orientation of the intraocular lens 2 does not correspond between FIGS. 1 (a) and 1 (b). The intraocular lens 2 is a so-called one-piece type in which the lens main body and the support portion are integrally formed of the same material, and the lens material is a soft acrylic material. The intraocular lens 2 includes a lens body 2a having a predetermined refractive power and a pair of long flat plate-like support portions 2b and 2e connected to the lens body 2a for holding the lens body 2a in the eyeball. Prepare. The support portions 2b and 2e are joined to the lens body 2a via joint portions 2d and 2f, respectively, so as to sandwich the optical axis center O of the lens body 2a.

  As shown in FIG. 1B, the joint portions 2d and 2f are formed so as to protrude tangentially from the outer peripheral surface of the lens, and are provided so as to be in contact with the outer periphery of the lens body 2a over a predetermined range. In the present embodiment, in the intraocular lens insertion device 1 to be described later, one of the two support portions 2b and 2e is the front side in the pushing direction of the intraocular lens of the lens body 2a, and the other support portion. The intraocular lens 2 is set on the stage unit 12 so that 2e is arranged on the rear side in the pushing direction of the intraocular lens of the lens body 2a. The support portion 2b arranged on the front side of the lens body 2a in the pushing direction of the intraocular lens is called a front support portion, and the support portion 2e arranged on the rear side of the lens body 2a in the pushing direction of the intraocular lens is called a rear support portion. .

  The support portions 2b and 2e of the intraocular lens 2 in the present embodiment are subjected to a texture process. Thereby, when the intraocular lens 2 is pressed and moved by the plunger 30, the posture of the intraocular lens 2 can be stabilized. Specifically, for example, when the intraocular lens 2 is pressed and moved by the plunger 30, an appropriate frictional force is generated between the support portions 2 b and 2 e and the inner wall surface of the nozzle body 10, thereby causing the intraocular lens 2. Can be prevented from rotating in the nozzle body 10. In addition, since the support portions 2b and 2e are subjected to the embossing process, the support portions 2b and 2e can be prevented from sticking to the lens body 2a when the intraocular lens 2 is folded in the nozzle body 10. it can. In the present embodiment, as shown in FIG. 1B, the lens body 2a has a peripheral portion of the lens body 2a of the intraocular lens 2, that is, a connecting portion between the lens body 2a and the support portions 2b and 2e. By providing the optical surfaces 2d and 2g having small curvatures that alleviate the inclination of the optical surface, the center thickness of the lens is reduced, the sectional area of the lens is also reduced, and a thin lens shape is realized. Here, the optical surfaces 2d and 2g may be flat.

In the range where the joint portions 2d and 2f are in contact with the outer periphery of the lens body 2a, the optical portion diameter of the front surface of the optical axis, that is, the surface arranged on the cornea side when inserted into the eye is larger than the other ranges. Since it is slightly larger by the processing margin, the optical part is slightly elliptical (non-circular) in front of the optical axis. In addition, the optical portion of the rear surface of the optical axis, that is, the surface disposed on the capsular bag side when inserted into the eye is also in other ranges in the range where the joint portions 2d and 2f are in contact with the outer periphery of the lens body 2a. The diameter of the optical part is about 10% larger than that of the joint part 2d, 2f, which also has a function as an optical lens surface. As a result, the effective range of the lens is widened even a little within the predetermined dimensions defined for the lens body 2a. Generally, the optical part diameter of the lens body 2a in a range not in contact with the joints 2d and 2f is 5.5 mm to 7.0 mm.

  As shown in FIG. 1B, in the intraocular lens 2 of the present embodiment, the length of the support portion 2b, that is, the length L1 from the joint portion 2d to the tip of the support portion 2b is the length of the support portion 2e. That is, it is set to be longer than the length L2 from the joint 2f to the tip of the support 2e.

  FIG. 2A and FIG. 2B show an example of the configuration of the intraocular lens insertion instrument 1 used for inserting the intraocular lens of the present embodiment into the eye. 2A is a plan view of the intraocular lens insertion device 1 when the stage lid 13 is opened, and FIG. 2B is a side view of the intraocular lens insertion device 1 when the stage lid 13 is closed. The figure is shown. The nozzle body 10 of the intraocular lens insertion device 1 is a cylindrical member having a substantially rectangular cross section, and a rear end portion 10b that is largely open at one end portion and an insertion tube that is narrowed to the other end portion. The nozzle part 15 and the front-end | tip part 10a as a part are provided. As shown in FIG. 2 (b), the tip 10a is opened obliquely. The plunger 30 is inserted into the nozzle body 10 and can reciprocate.

  In the following description, the direction from the rear end portion 10b of the nozzle body 10 to the front end portion 10a is the front direction or the front direction, the reverse direction is the rear direction or the rear direction, and the front side of the page in FIG. The direction is the downward direction, the front direction in FIG. 2B is the left direction, and the opposite direction is the right direction. In this case, the upper side is the front side of the optical axis of the lens body 2a of the intraocular lens 2, the lower side is the rear side of the optical axis of the lens body 2a, the front side is the front side in the pressing direction by the plunger 30, and the rear side is the plunger. 30 corresponds to the rear side in the pressing direction.

  Near the rear end portion 10 b of the nozzle body 10, there is integrally provided a holding portion 11 that protrudes in a plate shape and hooks a finger when the surgeon pushes the plunger 30 toward the distal end side of the nozzle body 10. A stage portion 12 for setting the intraocular lens 2 is provided on the rear side of the nozzle portion 15 in the nozzle body 10. The stage portion 12 opens to the upper side of the nozzle body 10 by opening the stage lid portion 13. Further, a positioning member 50 is attached to the stage portion 12 from the lower side of the nozzle body 10. With this positioning member 50, the intraocular lens 2 is stably positioned on the stage portion 12 even before use (during transportation).

  That is, in the intraocular lens insertion instrument 1, the intraocular lens 2 is placed on the stage unit 12 in front of the optical axis while the stage lid unit 13 is opened and the positioning member 50 is attached to the stage unit 12 at the time of manufacture. Set with the side up. Then, after the stage lid 13 is closed, it is shipped and sold. Further, at the time of use, the operator supplies the lubricant for the intraocular lens 2 into the stage portion 12 through the lubricant supply hole 20a. Then, the operator removes the positioning member 50 with the stage lid portion 13 closed, and then pushes the plunger 30 into the distal end side of the nozzle body 10.

  As a result, the intraocular lens 2 is pressed by the plunger 30 and moved to the nozzle part 15, and then the intraocular lens 2 is released into the eyeball from the distal end part 10 a. In addition, the nozzle main body 10, the plunger 30, and the positioning member 50 in the intraocular lens insertion device 1 are formed of a resin material such as polypropylene. Polypropylene is a material with a proven track record in medical equipment and high reliability such as chemical resistance.

In addition, a confirmation window portion 17 is formed on a part of the stage lid portion 13 by forming a thin portion. It should be noted that how thin the confirmation window 17 in the stage lid 13 should be determined as appropriate based on the material forming the stage lid 13 and the visibility of the intraocular lens from the confirmation window 17. Good. In addition, by forming the confirmation window portion 17, an effect of reducing sink marks when the stage lid portion 13 is molded can be expected.

  FIG. 3 shows a plan view of the nozzle body 10. As described above, in the nozzle body 10, the intraocular lens 2 is set on the stage unit 12. In this state, the intraocular lens 2 is pressed by the plunger 30 and is released from the distal end portion 10a. In addition, a through hole 10 c whose cross-sectional shape changes according to a change in the outer shape of the nozzle body 10 is provided in the nozzle body 10. When the intraocular lens 2 is released, the intraocular lens 2 is deformed according to a change in the cross-sectional shape of the through hole 10c in the nozzle body 10 and easily enters an incision formed in the patient's eyeball. It is discharged after being transformed into a shape.

  Moreover, the front-end | tip part 10a becomes what is called a bevel cut shape cut diagonally so that the area | region of the upper side of the nozzle part 15 may become a front side rather than the area | region of a lower side. In addition, although the detail of the front-end | tip of the nozzle part 15 which concerns on this embodiment is mentioned later, about the shape cut diagonally of this front-end | tip part 10a, it may be cut diagonally diagonally seeing from the left-right direction. However, it may be cut obliquely so as to have a bulge on the outside, that is, a curved shape.

  A stage groove 12 a having a width slightly larger than the diameter of the lens body 2 a of the intraocular lens 2 is formed in the stage portion 12. The dimension in the front-rear direction of the stage groove 12 a is set to be larger than the maximum width dimension including the support portions 2 b and 2 e extending on both sides of the intraocular lens 2. Further, a set surface 12b, which is a mounting surface for the intraocular lens, is formed by the bottom surface of the stage groove 12a. The vertical position of the set surface 12b is set higher than the height position of the bottom surface of the through hole 10c of the nozzle body 10, and the set surface 12b and the bottom surface of the through hole 10c are connected by a bottom slope 10d. .

  The stage unit 12 and the stage lid unit 13 are formed integrally. The stage lid portion 13 has the same size in the front-rear direction as the stage portion 12. The stage lid portion 13 is connected by a thin plate-like connecting portion 14 formed by extending the side surface of the stage portion 12 to the stage lid portion 13 side. The connecting portion 14 is formed to be bendable at the center portion, and the stage lid portion 13 can be closed by overlapping the stage portion 12 from above by bending the connecting portion 14.

  In the stage lid portion 13, ribs 13 a and 13 b for reinforcing the stage lid portion 13 and stabilizing the position of the intraocular lens 2 are provided on the surface facing the set surface 12 b when the lid is closed, and the upper side of the plunger 30. A guide protrusion 13c is provided as a guide. The stage lid portion 13 is provided with a lubricant supply hole 20a for injecting a lubricant into the stage portion 12 before the operation of inserting the intraocular lens 2 into the eyeball. The lubricant supply hole 20 a is a hole that connects the outside of the stage unit 12 and the intraocular lens 2 housed in the stage unit 12 when the stage lid unit 13 is closed.

  A positioning member 50 is detachably provided below the set surface 12b of the stage unit 12. FIG. 4A and FIG. 4B show an example of the configuration of the positioning member 50. FIG. 4A shows a plan view of the positioning member 50, and FIG. 4B shows a left side view of the positioning member 50. The positioning member 50 is configured as a separate body from the nozzle main body 10, and has a structure in which a pair of side wall portions 51, 51 are connected by a connecting portion 52. At the lower ends of the respective side wall portions 51, holding portions 53, 53 extending outward and extending are formed.

A pair of first mounting portions 54 and 54 projecting upward are formed inside the side wall portions 51 and 51. Further, first positioning portions 55 and 55 are formed to protrude from the outer peripheral side of the upper end surfaces of the first placement portions 54 and 54. The distance between the inner sides of the first positioning portions 55 and 55 is set slightly larger than the diameter of the lens body 2 a of the intraocular lens 2.

  In addition, a pair of second placement portions 56 and 56 protruding upward are formed inside the side wall portions 51 and 51. The heights of the upper surfaces of the second mounting parts 56 and 56 are equal to the heights of the upper surfaces of the first mounting parts 54 and 54. Furthermore, second positioning portions 57 and 57 that protrude further upward are formed on the outer portions of the upper surfaces of the second placement portions 56 and 56 over the entire left and right direction of the second placement portions 56 and 56. . The distance between the inner sides of the second positioning portions 57 and 57 is set to be slightly larger than the diameter dimension of the lens body 2 a of the intraocular lens 2.

  Further, a third placement portion 58 on which a part of the support portion 2 b corresponding to the front support portion of the intraocular lens 2 is placed is formed inside the side wall portions 51 and 51. Further, a third positioning portion 59 that protrudes further upward from the third placement portion 58 is formed. A part of the front support part comes into contact with the third positioning part 59. And the 4th mounting part 60 in which a part of support part 2e equivalent to the back support part of the intraocular lens 2 is mounted is formed inside the side wall parts 51 and 51. As shown in FIG. Furthermore, the 4th positioning part 61 which protrudes further upwards from the 4th mounting part 60 is formed. A part of the rear support part comes into contact with the fourth positioning part 61. In addition, as shown in FIG.4 (b), the height of the upper surface of the 4th mounting part 60 and the 4th positioning part 61 is higher than the height of the upper surface of the 1st-3rd mounting part and the 1st-3rd positioning part. Is also provided to be low. On the other hand, on the outside of the side wall portions 51, 51, a rotation preventing wall portion 62 for preventing unnecessary rotation when the positioning member 50 is removed is provided.

  The positioning member 50 is assembled from below the set surface 12 b of the nozzle body 10. The set surface 12b of the nozzle body 10 is formed with a set surface through hole 12c that penetrates the set surface 12b in the thickness direction. The outer shape of the set surface through-hole 12c is substantially similar to the shape of the first to fourth placement portions and the first to fourth positioning portions of the positioning member 50 as viewed from above. When the positioning member 50 is attached to the nozzle body 10, the first to fourth placement portions and the first to fourth positioning portions are inserted into the set surface through hole 12c from the lower side of the set surface 12b, and the set surface It protrudes above 12b.

  When the intraocular lens 2 is set on the setting surface 12b, the bottom surface of the outer peripheral portion of the lens body 2a is placed on the upper surfaces of the first placement portions 54 and 54 and the second placement portions 56 and 56. The Further, the position of the lens body 2a is restricted with respect to the horizontal direction (the direction horizontal to the set surface 12b) by the first positioning portions 55, 55 and the second positioning portions 57, 57. Furthermore, the two support portions 2b and 2e of the intraocular lens 2 are placed on the upper surfaces of the third placement portion 58 and the fourth placement portion 60, respectively. Further, the positions of the two support portions 2b and 2e are restricted with respect to the horizontal direction by the third positioning portion 59 and the fourth positioning portion 61, respectively.

  Next, FIG. 5A and FIG. 5B show an example of the configuration of the plunger 30. The plunger 30 has a slightly larger longitudinal length than the nozzle body 10. And it forms from the action part 31 of the front end side based on a column shape, and the insertion part 32 of the rear end side based on a rectangular rod shape. And the action part 31 is comprised including the cylindrical part 31a made into the column shape, and the thin plate-shaped flat part 31b extended in the left-right direction of the cylindrical part 31a.

  A cutout portion 31 c is formed at the distal end portion of the action portion 31. As shown in FIG. 5A, the notch 31c is formed in a groove shape that opens upward in the action portion 31 and penetrates in the left-right direction. Further, as shown in FIG. 5B, the groove wall on the distal end side of the notch 31 c is formed with an inclined surface that goes upward as it goes to the distal end side of the action portion 31. On the other hand, the insertion portion 32 has a substantially H-shaped cross section as a whole, and the horizontal and vertical dimensions thereof are set slightly smaller than the through hole 10 c of the nozzle body 10. In addition, a disc-shaped pressing plate portion 33 is formed at the rear end of the insertion portion 32 so as to spread in the vertical and horizontal directions.

  A claw portion 32 a that protrudes toward the upper side of the insertion portion 32 and can be moved up and down by the elasticity of the material of the plunger 30 is formed at a portion of the insertion portion 32 that is ahead of the center in the front-rear direction. When the plunger 30 is inserted into the nozzle body 10, the locking hole 10e shown in FIG. 3 provided in the thickness direction on the upper surface of the nozzle body 10 and the claw portion 32a are engaged. The relative position between the nozzle body 10 and the plunger 30 in the initial state is determined. It should be noted that the claw portion 32a and the locking hole 10e are formed at the positions where the distal end of the action portion 31 is located on the rear side of the lens body 2a of the intraocular lens 2 set on the stage portion 12 in the engaged state. The support portion 2e of the main body 2a is set so that the cutout portion 31c can be supported from below.

  Before the intraocular lens 2 of the intraocular lens insertion device 1 configured as described above is stored, the plunger 30 is inserted into the nozzle body 10 and disposed at the initial position. Further, as described above, the positioning member 50 is attached to the nozzle body 10 from below the set surface 12b. Thereby, the 1st mounting part 54 and the 2nd mounting part 56 of the positioning member 50 are hold | maintained in the state protruded to the set surface 12b.

  The lens body 2a of the intraocular lens 2 is placed and positioned on the upper surfaces of the first placement part 54 and the second placement part 56 with the support parts 2b and 2e facing the front-rear direction of the nozzle body 10. . In this state, a part of the support portion 2e of the intraocular lens 2 is sandwiched between the notches 31c of the plunger 30 and is supported by the bottom surface.

  After the intraocular lens 2 is set on the stage portion 12, the lubricant is supplied from the lubricant supply hole 20a into the stage portion 12, and the positioning member 50 is removed from the set surface 12b. Then, the pressing plate portion 33 of the plunger 30 is pushed into the distal end side of the nozzle body 10, whereby the distal end of the action portion 31 of the plunger 30 is placed on the outer periphery of the lens body 2 a of the intraocular lens 2 set on the set surface 12 b. The part abuts, and the plunger 30 guides the intraocular lens 2 toward the distal end part 10a. After the intraocular lens is moved to the nozzle portion 15, the distal end portion 10a of the nozzle portion 15 is inserted into the incision. Here, since the front-end | tip part 10a has a diagonal opening shape, insertion to an incision can be performed easily.

  6 (a) to 6 (c), the intraocular lens 2 is set in the intraocular lens insertion device 1 as described above, and the intraocular lens 2 is moved through the nozzle body 10 by the plunger 30 and the tip portion 10a. An example of the state of the intraocular lens 2 when it moves toward is shown typically.

  The intraocular lens 2 set in the intraocular lens insertion device 1 is moved in the nozzle body 10 by the pressing movement by the plunger 30. At this time, as shown to Fig.6 (a), the front-end | tip part 2c of the support part 2b of the intraocular lens 2 contact | abuts to the internal peripheral surface of the through-hole 10c. In the present embodiment, as described with reference to FIG. 1, the length of the support portion 2b is longer than the support portion 2e among the pair of support portions 2b and 2e. In addition, the through hole 10c of the nozzle body 10 is reduced in diameter toward the tip portion 10a. For this reason, when the intraocular lens 2 is moved to the distal end portion 10a side, the distal end portion 2c of the support portion 2b tends to come into contact with the through hole 10c.

  Further, when the intraocular lens 2 is moved in the nozzle body 10 by the pressing movement by the plunger 30, a state in which a part of the support portion 2 e of the intraocular lens 2 is sandwiched between the notch portions 31 c of the plunger 30. Maintained. In the present embodiment, since the length of the support portion 2e is set to be shorter than that of the support portion 2b, as shown in FIG. 6A, the support portion 2e that bends when sandwiched between the notches 31c. There is no concern that the tip of the nozzle contacts the through hole 10c of the nozzle body 10. Further, as shown in FIG. 6C, the tip of the support portion 2e faces the lens body 2a, and the support portion 2e is likely to be in a so-called tucking state included in the lens body 2a.

  After the distal end portion 2c of the support portion 2b comes into contact with the through hole 10c, when the intraocular lens 2 is moved to the distal end portion 10a side of the nozzle body 10 by the plunger 30, the distal end portion 2c comes into contact with the through hole 10c. Since the lens body 2a is moved to the tip portion 10a in this state, the support portion 2b is bent so that the tip portion 2c faces the lens body 2a side as shown in FIG. When the intraocular lens 2 is further moved toward the tip portion 10a side of the nozzle body 10 by the plunger 30, the lens body 2a is matched to the inner peripheral shape of the through hole 10c whose diameter decreases toward the tip portion 10a. Deform. At this time, as shown in FIG. 6C, the end of the lens body 2a in the left-right direction is curved toward the center of the optical axis of the lens body 2a. In addition, the distal end portion 2c of the support portion 2b and the distal end portion of the support portion 2e are in a so-called tacking state in which the curved lens body 2a is included.

  Therefore, according to the intraocular lens 2 of the present embodiment, when the intraocular lens 2 is moved to the distal end portion 10a side of the nozzle main body 10 by the plunger 30, the support portion 2b that is the front support portion has its distal end. When the portion 2c comes into contact with the nozzle body 10, the lens body 2a is easily bent and is easily tacked. Further, the support portion 2 e that is the rear support portion is bent by the notch portion 31 c of the plunger 30, and is easily brought into a tacked state without coming into contact with the nozzle body 10.

  FIG. 7 schematically shows an example of the intraocular lens 2 that is properly positioned with respect to the equator portion 70 of the crystalline lens capsule after being injected into the eye by the intraocular lens insertion device 1. The intraocular lens 2 is pressed and moved in the through hole 10c of the nozzle body 10 by the plunger 30 and is injected into the eye from the distal end portion 10a. At this time, as shown in FIG. 7, in the intraocular lens 2, the lens body 2a returns to the original shape from the folded state, and the support portions 2b and 2e are released from the tacked state with respect to the lens body 2a. Then, the lens main body 2a is positioned in the lens capsule by the support portions 2b and 2e when a part of the support portions 2b and 2e comes into contact with the equator portion 70 of the lens capsule.

  In a state in which a part of the support portion 2b is in contact with the equator portion 70 of the lens capsule, the tip 2c of the support portion 2b is not in contact with the equator portion 70 of the lens capsule as shown in FIG. Therefore, in this embodiment, even if the support portion 2b is formed to be longer than the support portion 2e, the length of the support portion 2b is increased when the intraocular lens 2 is injected into the eye. There is no concern that the possibility that the distal end portion 2c interferes with the tissue of the lens capsule increases. That is, according to the intraocular lens 2 of the present embodiment, the support portion can be easily tacked in the intraocular lens insertion device as compared with the conventional intraocular lens, and the positioning of the lens body in the eye can be performed in the conventional eye. It can be performed in the same manner as the inner lens.

  The above is the description related to the present embodiment, but the configuration of the above-described intraocular lens and the like is not limited to the above-described embodiment, and various configurations are possible within the scope that does not lose the technical idea of the present invention. It can be changed. For example, in the above embodiment and the modifications described below, the length and thickness of the support portion of the intraocular lens, the ease of bending, and the like can be changed as appropriate in consideration of the viscosity of the liquid used as the lubricant. it can.

  Below, the modification of said embodiment is demonstrated. In the following description, the same components as those in the above embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The configuration in the above embodiment and the configuration in the modification described below may be combined as appropriate.

FIGS. 8A to 8C show an example of the intraocular lens 3 according to a modification of the above embodiment. The intraocular lens 3 is provided with a protruding portion 3c that protrudes a predetermined length toward the lens body 2a at the tip of a support portion 3b corresponding to the front support portion when set in the intraocular lens insertion instrument 1. Yes. In the example shown in FIG. 8B, the thickness of the protruding portion 3c is the same as the thickness of the other portions of the support portion 3b, but when the intraocular lens 3 is positioned by the support portions 3b and 2e in the eye. The thickness of the protrusion 3c can be appropriately changed in consideration of the balance in the eye of the lens body 2a.

  When the intraocular lens 3 set in the intraocular lens insertion device 1 is moved in the nozzle body 10 by the pressing movement by the plunger 30, the support part 3b of the intraocular lens 3 is provided with a protruding part 3c. For this reason, the support portion 3b is likely to come into contact with the inner peripheral surface of the through hole 10c as compared with the case where the protruding portion 3c is not provided. When the intraocular lens 3 is moved toward the distal end portion 10a side of the nozzle body 10 by the plunger 30 after the protruding portion 3c comes into contact with the through hole 10c, the lens in a state where the protruding portion 3c comes into contact with the through hole 10c. Since the main body 2a is moved to the distal end portion 10a, as shown in FIG. 8C, the support portion 3b is bent so that the protruding portion 3c faces the lens main body 2a side. Therefore, as in the above-described embodiment, the protruding portion 3c of the support portion 3b is in a tacked state enclosed in the lens body 2a.

  Therefore, also with the intraocular lens 3 of this modification, when the intraocular lens 3 is moved toward the distal end portion 10a side of the nozzle body 10 by the plunger 30, the support portion 3b which is the front support portion is the protruding portion 3c. Is in contact with the nozzle body 10 and is easily bent into the lens body 2a to be in a tacked state.

  FIGS. 9A to 9C show an example of the intraocular lens 4 according to a modification of the above embodiment. The intraocular lens 4 is formed such that the support portion 4b corresponding to the front support portion when set in the intraocular lens insertion instrument 1 is longer than the support portion 2e, like the support portion 2b of the above-described embodiment. Has been. That is, the length L3 from the joint 2d to the tip of the support 4b is set to be longer than the length of the support 2e, that is, the length L4 from the joint 2f to the tip of the support 2e. .

  Further, in the present modification, the tip portion 4c of the support portion 4b is formed so as to be thinner than other portions of the support portion 4b. In addition, the thickness of the front-end | tip part 4c can be suitably changed in consideration of the balance in the eye of the lens main body 2a when the intraocular lens 4 is positioned by the support parts 4b and 2e in the eye. Thus, in this modification, the support part 4b has the front-end | tip part 4c thinned only predetermined length toward the junction part 2d with the lens main body 2a from the front-end | tip.

  When the intraocular lens 4 set in the intraocular lens insertion instrument 1 is moved in the nozzle body 10 by the pressing movement by the plunger 30, the support part 4b of the intraocular lens 4 is formed longer than the support part 2e. Therefore, as in the case of the intraocular lens 2 described above, the tip portion 4c of the support portion 4b has an inner periphery of the through hole 10c as compared with the case where the length of the support portion 4b is the same as the length of the support portion 2e. Easy to contact the surface. When the intraocular lens 4 is moved to the distal end portion 10a side of the nozzle body 10 by the plunger 30 after the distal end portion 4c abuts on the through hole 10c, the lens in a state where the distal end portion 4c abuts on the through hole 10c. Since the main body 2a is moved to the tip portion 10a, as shown in FIG. 9C, the support portion 4b is bent so that the tip portion 4c faces the lens body 2a side. Since the front end portion 4c is thinner than the other portions of the support portion 4b, it is easier to bend. Therefore, as in the above-described embodiment, the tip portion 4c of the support portion 4b is in a tacked state enclosed in the lens body 2a.

  Therefore, also with the intraocular lens 4 of the present modification, when the intraocular lens 4 is moved to the distal end portion 10a side of the nozzle body 10 by the plunger 30, the support portion 4b that is the front support portion is the distal end portion 4c. Is in contact with the nozzle body 10 and is easily bent into the lens body 2a to be in a tacked state.

  FIG. 10A and FIG. 10B show an example of the intraocular lens 5 according to a modification of the above embodiment. The intraocular lens 5 is formed so that the thickness of the support portion 5b is thinner than the thickness of the support portion 2e from the joint portion 2d to the tip of the support portion 5b. In addition, the thickness of the front-end | tip part 5b can be suitably changed in consideration of the balance in the eye of the lens main body 2a when the intraocular lens 5 is positioned by the support parts 5b and 2e in the eye.

  When the intraocular lens 5 is moved by the plunger 30 toward the distal end portion 10a side of the nozzle body 10 because the thickness of the support portion 5b is thinner than the thickness of the support portion 2e over the entire length of the support portion 5b. In addition, even when the resistance given to the support portion 5b by the lubricant is small, the support portion 5b is easily bent into the lens body 2a side and is easily tacked.

  FIG. 11A and FIG. 11B show an example of the intraocular lens 6 according to a modification of the above embodiment. The intraocular lens 6 has a lens body 2a at the distal end of the support portion 6b corresponding to the front support portion when set in the intraocular lens insertion instrument 1 in the same manner as the support portion 3b of the intraocular lens 3 of the above modification. A protruding portion 6c that protrudes a predetermined length toward the side is provided. In the example shown in FIG. 11B, the size of the protrusion 6c is obtained when it is assumed that, for example, the tip 2c of the support 2b of the intraocular lens of the above embodiment is bent toward the lens body 2a. It can be made the same size as the part corresponding to the part 6c.

  Similarly to the intraocular lens 3 according to the above modification, the intraocular lens 6 according to the present modification is also provided when the protrusion 6c is not provided when being moved through the nozzle body 10 by the pressing movement by the plunger 30. In comparison, the support portion 6b is likely to come into contact with the inner peripheral surface of the through hole 10c. When the intraocular lens 6 is moved toward the distal end portion 10a side of the nozzle body 10 by the plunger 30 after the protruding portion 6c contacts the through hole 10c, the protruding portion 6c contacts the through hole 10c. Since the lens body 2a is moved to the tip portion 10a, the support portion 6b is bent so that the protruding portion 6c faces the lens body 2a side. Therefore, as in the above-described embodiment, the protruding portion 6c of the support portion 6b is in a tacked state enclosed in the lens body 2a.

  Therefore, when the intraocular lens 6 is moved toward the distal end portion 10a side of the nozzle body 10 by the plunger 30 also by the intraocular lens 6 of the present modification, the support portion 6b that is the front support portion is the protruding portion 6c. Is in contact with the nozzle body 10 and is easily bent into the lens body 2a to be in a tacked state.

  FIGS. 12A to 12C show an example of the intraocular lens 7 according to a modification of the above embodiment. The intraocular lens 7 is formed such that the support portion 7b corresponding to the front support portion when set in the intraocular lens insertion instrument 1 is longer than the support portion 2e, like the support portion 2b of the above-described embodiment. Has been. That is, the length L5 from the joint portion 2d to the tip of the support portion 7b is set to be longer than the length of the support portion 2e, that is, the length L6 from the joint portion 2f to the tip of the support portion 2e. .

  Furthermore, in this modification, the width of the tip portion 7c of the support portion 7b is formed to be narrower than the width of other portions of the support portion 7b. Note that the width of the distal end portion 7c can be appropriately changed in consideration of the balance in the eye of the lens body 2a when the intraocular lens 7 is positioned by the support portions 7b and 2e in the eye. As described above, in the present modification, the support portion 7b has the tip portion 7c whose width is narrowed by a predetermined length from the tip toward the joint portion 2d with the lens body 2a.

Further, the tip 7c is provided with constrictions 7h, 7i, 7j. The tip 7c is biased to the lens body 2a side of the support portion 7b by the constriction 7h, and contact between the tip 7c and the equatorial portion of the crystalline lens capsule can be prevented. By the constriction 7i, when the intraocular lens 7 is inserted into the eye, the distance between the distal end portion 7c and the lens body 2a can be secured. As a result, it is possible to prevent a gap between the lens body 2a and the support portion 7b from preventing the anterior capsule side and the posterior capsule side from contacting each other. The constriction 7j makes it easier for the tip 7c to deform toward the lens body 2a.

  As shown in FIG. 12C, the intraocular lens 7 is set in the intraocular lens insertion device 1 with the distal end portion 7c in contact with the through hole 10c. Thereby, when the intraocular lens 7 is moved to the tip portion 10a side of the nozzle body 10 by the plunger 30, the lens body 2a is moved to the tip portion 10a in a state where the tip portion 7c is in contact with the through hole 10c. Therefore, the support portion 7b is bent so that the distal end portion 7c faces the lens body 2a side. Therefore, as in the above-described embodiment, the tip portion 7c of the support portion 7b is in a tacked state enclosed in the lens body 2a. Since the constriction 7j is provided, even when the distal end portion 7c is in contact with the through hole 10c, the intraocular lens can be inserted without deforming the joint portion 2d side of the support portion 7b whose width is not reduced. It can be set in the instrument 1.

  Therefore, also with the intraocular lens 7 of the present modification, the support portion 7b, which is the front support portion, is easily bent into the lens main body 2a side when the tip end portion 7c comes into contact with the nozzle main body 10 and is easily tacked.

  FIG. 13A and FIG. 13B show an example of the intraocular lens 8 according to a modification of the above embodiment. In this modification, when the proximal end portion of the support portion 8 b of the intraocular lens 8 is set on the intraocular lens insertion device 1, the proximal end portion ( (Indicated by a two-dot chain line in the figure), the distance between the tip of the support portion 8b and the inner peripheral surface of the through hole 10c is shifted from the joint portion 8d in a direction in which the distance decreases. Here, the base end portion refers to the end portion of the support portion on the side connected to the joint portion.

  When the intraocular lens 8 of this modification is moved in the nozzle body 10 by the pressing movement by the plunger 30, the base end part comes into contact with the inner peripheral surface of the through hole 10c before the tip part of the support part 8b. It is prevented. Since the lens body 2a is moved to the tip portion 10a after the tip portion of the support portion 8b first contacts the through hole 10c, the support portion 8b is arranged so that the tip portion of the support portion 8b faces the lens body 2a side. Bends. Therefore, as in the above-described embodiment, the support portion 8b is in a tacked state enclosed in the lens body 2a.

  Therefore, even when the intraocular lens 8 of the present modification is moved to the distal end portion 10a side of the nozzle body 10 by the plunger 30, the support portion 8b, which is the front support portion, has a distal end portion. By coming into contact with the nozzle body 10, the lens body 2a is easily bent and is easily tacked.

  FIG. 14A and FIG. 14B show an example of the intraocular lens 9 according to a modification of the above embodiment. In the intraocular lens 9, the width of the base end portion 9m of the support portion 9b is wider than the width of the base end portion (indicated by a two-dot chain line in the figure) of the support portions of the intraocular lenses 2-8. The width of the base end portion 9m of the support portion 9b is wider than the width of the base end portion of the other support portions (in the case of FIG. 14, the base end portion 2m of the support portion 2e). More specifically, the width of the base end portion 9m of the support portion 9b at the same distance from the optical axis center O on a plane perpendicular to the optical axis center O of the lens body (that is, on the drawing sheet) When the width of the base end portion 2m of the support portion 2e is compared, the width of the base end portion 9m is wider than the width of the base end portion 2m.

When the intraocular lens 9 of the present modification is moved in the nozzle body 10 by the pressing movement by the plunger 30, the proximal end portion contacts the inner peripheral surface of the through hole 10c before the distal end portion of the support portion 9b. Even if they come into contact with each other, they are difficult to deform because the width of the base end portion is widened. Therefore, it is prevented that the front-end | tip part of the support part 9b extends ahead by the deformation | transformation which the base end part does not intend. Furthermore, since the gap between the base end portion of the support portion 9b and the inner peripheral surface of the through hole 10c is small, the clockwise rotation of the intraocular lens 9 can also be suppressed. When the lens body 2a is moved to the tip portion 10a, the tip portion of the support portion 9b comes into contact with the inner peripheral surface of the through hole 10c, and the support portion 9b is bent so that the tip portion faces the lens body 2a side. Therefore, as in the above-described embodiment, the support portion 9b is in a tacked state that is included in the lens body 2a.

  Therefore, also with the intraocular lens 9 of this modification, when the intraocular lens 9 is moved toward the distal end portion 10a side of the nozzle body 10 by the plunger 30, the support portion 9b, which is a front support portion, has a distal end portion. By coming into contact with the nozzle body 10, the lens body 2a is easily bent and is easily tacked.

  FIG. 15A and FIG. 15B show an example of an intraocular lens 100 according to a modification of the above embodiment. In the intraocular lens 100, the base end portion of the support portion 100b is formed of a material harder than other portions of the support portion 100b.

  When the intraocular lens 100 of the present modification is moved in the nozzle body 10 by the pressing movement by the plunger 30, the base end portion contacts the inner peripheral surface of the through hole 10c before the distal end portion of the support portion 100b. Even if they come into contact with each other, the base end portion is harder than other portions and is not easily deformed. Therefore, it can prevent that the front-end | tip part of the support part 100b extends ahead by the deformation | transformation which the base end part does not intend. When the lens body 2a is moved to the distal end portion 10a, the distal end portion of the support portion 100b comes into contact with the inner peripheral surface of the through hole 10c, and the support portion 100b is bent so that the distal end portion faces the lens body 2a side. Therefore, as in the above-described embodiment, the support portion 100b is in a tacked state that is included in the lens body 2a.

  Therefore, even when the intraocular lens 100 of the present modification is moved to the distal end portion 10a side of the nozzle body 10 by the plunger 30, the support portion 100b that is the front support portion has a distal end portion. By coming into contact with the nozzle body 10, the lens body 2a is easily bent and is easily tacked.

  Further, in the intraocular lens 100, when the proximal end portion of the support portion 100b sets the intraocular lens 8 to the intraocular lens insertion instrument 1, the front side of the intraocular lens in the push-out direction with respect to the optical axis center O of the lens body. The base end portion of the support portion 100b is located more than the distance between the base end portion of the support portion of the intraocular lenses 2 to 7 and the inner peripheral surface of the intraocular lens insertion device. It can also be set as the structure shifted with respect to the junction part 2d so that the distance with the internal peripheral surface of an intraocular lens insertion instrument may become short. For this reason, when the intraocular lens 100 is moved to the distal end portion 10a side of the nozzle body 10, the gap between the proximal end portion of the support portion 100b and the inner peripheral surface of the through hole 10c is small, and therefore the distal end portion of the support portion 100b. Can be prevented from rotating in a direction away from the inner peripheral surface of the through hole 10c. Therefore, when the intraocular lens 100 is moved to the tip portion 10a side of the nozzle body 10 by the plunger 30, the support portion 100b, which is the front support portion, comes into contact with the nozzle body 10 so that the lens body It becomes easy to be in a tucking state by bending to the 2a side.

  In the structure for preventing the deformation of the base end portion of the front support portion, the base end portion of the support portion disposed in front of the intraocular lens in the pushing direction from the optical axis center O of the lens body is thicker than other portions of the support portion. It may be a structure. Also in this case, rotation is prevented by adopting a configuration in which the distance between the proximal end portion of the support portion and the inner peripheral surface of the intraocular lens insertion device is shifted with respect to the joint portion 2d. You can also

  FIG. 16A and FIG. 16B show an example of the intraocular lens 110 according to a modification of the above embodiment. The intraocular lens 110 is formed such that the support part 110b corresponding to the front support part when set in the intraocular lens insertion instrument 1 is longer than the support part 2e, like the support part 2b of the above embodiment. Has been. That is, the length L9 from the joint portion 2d to the tip of the support portion 110b is set to be longer than the length of the support portion 2e, that is, the length L10 from the joint portion 2f to the tip of the support portion 2e. .

  Furthermore, in this modification, constrictions 110h and 110j are provided on the lens capsule side and the lens body 2a side in the width direction of the support portion 110b, respectively. The sizes of the constrictions 110h and 110j can be appropriately changed in consideration of the balance in the eye of the lens body 2a when the intraocular lens 110 is positioned by the support portions 110b and 2e in the eye. Thus, in this modification, the support part 110b has the constrictions 110h and 110j which reduce the width | variety of a support part in the predetermined position from the front-end | tip.

  When the intraocular lens 110 set in the intraocular lens insertion instrument 1 is moved in the nozzle body 10 by the pressing movement by the plunger 30, the support part 110b of the intraocular lens 110 is formed longer than the support part 2e. Therefore, as in the case of the intraocular lens 2 described above, the distal end portion 110c of the support portion 110b has an inner periphery of the through hole 10c as compared with the case where the length of the support portion 110b is the same as the length of the support portion 2e. Easy to contact the surface. When the intraocular lens 110 is moved to the distal end portion 10a side of the nozzle body 10 by the plunger 30 after the distal end portion 110c contacts the through hole 10c, the lens is in a state where the distal end portion 110c contacts the through hole 10c. Since the main body 2a is moved to the front end portion 10a, the support portion 110b is bent so that the front end portion 110c faces the lens main body 2a side. Accordingly, as in the above-described embodiment, the tip portion 110c of the support portion 110b is in a tacked state enclosed in the lens body 2a.

  Therefore, also with the intraocular lens 110 of the present modification, when the intraocular lens 110 is moved toward the distal end portion 10a side of the nozzle body 10 by the plunger 30, the support portion 110b that is the front support portion becomes the distal end portion 110c. Is in contact with the nozzle body 10 and is easily bent into the lens body 2a to be in a tacked state.

  Further, since the support 110b of the intraocular lens 110 of this modification is provided with constrictions 110h and 110j on the lens capsule side and the lens body 2a side in the width direction, the intraocular lens 110 is the equator of the lens capsule. Even when the distal end portion 110c interferes with the tissue of the crystalline lens capsule when properly positioned with respect to the portion 70, the width of the support portion 110b becomes narrow at the portion where the constrictions 110h and 110j are provided. The distal end portion 110c is easily deformed toward the lens body 2a, and the influence on the tissue of the crystalline lens capsule can be suppressed. In this modification, the constriction is provided on both sides in the width direction of the support portion, but the same effect can be obtained even if the constriction is provided only on one side. Further, the structure of the lens capsule by changing the structure of the front support portion in the same manner as the intraocular lens 110 by providing a constriction in the configuration in which the protruding portion is provided at the tip of the support portion like the intraocular lens 3. The influence on can be suppressed.

1 Intraocular lens insertion device 2, 3, 4, 5, 6, 7, 8, 9, 100, 110 Intraocular lens 2a Lens body 2b, 2e, 3b, 4b, 5b, 6b, 7b, 8b, 9b, 100b 110b Support portions 2c, 4c, 5c, 110c Tip portions 3c, 6c Protruding portions 2m, 9m Base end portion 10 Nozzle body 10c Through hole

Claims (11)

An intraocular lens having a lens body having a predetermined refractive power, and two or more support portions for positioning the lens body in the eye,
The two or more support portions are joined to the lens body so as to sandwich the optical axis center of the lens body,
In a state where the intraocular lens is housed in an intraocular lens insertion device having an intraocular lens pushing member that pushes the intraocular lens and pushes it into the eye, of the two or more support parts, the lens body A support portion arranged on the front side in the pushing direction of the intraocular lens by the intraocular lens pushing member with respect to the center of the optical axis is more than the other supporting portion when the intraocular lens is pushed and moved by the intraocular lens pushing member. Also, the intraocular lens has a structure that is in contact with the peripheral surface of the through-hole of the intraocular lens insertion instrument and is easily bent toward the lens body.   The structure is a structure in which the length of the support portion disposed in front of the intraocular lens in the pushing direction with respect to the optical axis center of the lens body is longer than the lengths of the other support portions of the two or more support portions. The intraocular lens according to claim 1, wherein:   The structure is a structure having a protruding portion that protrudes toward the lens main body at the tip of a support portion that is disposed on the front side in the pushing direction of the intraocular lens with respect to the optical axis center of the lens main body. The intraocular lens according to claim 1 or 2.   In the structure, the thickness of the support portion disposed in front of the intraocular lens in the pushing direction with respect to the optical axis center of the lens body is predetermined from the tip of the support portion toward the joint portion with the lens body. The intraocular lens according to any one of claims 1 to 3, wherein the intraocular lens has a structure that is thinner than other portions of the support portion over its length.   In the structure, in the plane perpendicular to the optical axis of the lens body, the width of the distal end portion of the support portion arranged on the front side in the pushing direction of the intraocular lens with respect to the optical axis center of the lens body is The intraocular lens according to any one of claims 1 to 4, wherein the intraocular lens is narrower than a width of another portion of the support portion disposed on the front side in the pushing direction.   The intraocular lens according to any one of claims 1 to 5, wherein at least one constriction is provided in a support portion disposed on the front side in the pushing direction of the intraocular lens.   The structure includes a base end portion of a support portion that is disposed on the front side in the pushing direction of the intraocular lens with respect to the optical axis center of the lens body in a state where the intraocular lens is housed in the intraocular lens insertion device. Of the support portion disposed on the front side in the pushing direction of the intraocular lens with respect to the distance between the tip of the other support portion of the two or more support portions and the inner peripheral surface of the intraocular lens insertion device. 7. The device according to claim 1, wherein the distance between the distal end and the inner peripheral surface of the intraocular lens insertion device is shifted with respect to the joint portion with the lens body so as to be shorter. An intraocular lens according to claim 1.   In the structure, in a plane perpendicular to the optical axis of the lens body, the width of the base end portion of the support portion disposed on the front side in the pushing direction of the intraocular lens with respect to the optical axis center of the lens body is 2 or more. The intraocular lens according to any one of claims 1 to 6, wherein the intraocular lens is wider than a width of a base end portion of another support portion of the support portions. The structure is such that the base end portion of the support portion arranged on the front side in the pushing direction of the intraocular lens with respect to the optical axis center of the lens body has another support portion arranged on the front side in the pushing direction of the intraocular lens. The intraocular lens according to any one of claims 1 to 8, wherein the intraocular lens is formed of a material harder than the portion.   In the structure, the thickness of the support portion disposed in front of the intraocular lens in the pushing direction with respect to the optical axis center of the lens body is predetermined from the joint portion of the support portion to the lens body toward the tip. The intraocular lens according to any one of claims 1 to 9, wherein the intraocular lens has a structure that is thicker than other portions of the support portion over its length.   The intraocular lens according to any one of claims 1 to 10, wherein the intraocular lens is stored in advance in a storage portion of the intraocular lens of the intraocular lens insertion device.

Images