(19)
(11)EP 2 177 178 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
07.09.2022 Bulletin 2022/36

(21)Application number: 08777991.4

(22)Date of filing:  09.07.2008
(51)International Patent Classification (IPC): 
A61F 2/16(2006.01)
A61F 9/007(2006.01)
(52)Cooperative Patent Classification (CPC):
A61F 2/167
(86)International application number:
PCT/JP2008/062382
(87)International publication number:
WO 2009/008441 (15.01.2009 Gazette  2009/03)

(54)

INTRAOCULAR LENS INSERTION DEVICE FOR CONTROLLING MOVEMENT OF THE INTRAOCULAR LENS

VORRICHTUNG ZUM EINSETZEN EINER INTRAOKULARLINSE ZUR STEUERUNG DER BEWEGUNG DER INTRAOKULARLINSE

DISPOSITIF D'INSERTION DE LENTILLE INTRAOCULAIRE POUR CONTRÔLER LE MOUVEMENT DE LA LENTILLE INTRAOCULAIRE


(84)Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

(30)Priority: 11.07.2007 JP 2007182535

(43)Date of publication of application:
21.04.2010 Bulletin 2010/16

(73)Proprietor: HOYA Corporation
Tokyo 160-8347 (JP)

(72)Inventor:
  • INOUE, Masanobu
    Tokyo 161-8525 (JP)

(74)Representative: MERH-IP Matias Erny Reichl Hoffmann Patentanwälte PartG mbB 
Paul-Heyse-Strasse 29
80336 München
80336 München (DE)


(56)References cited: : 
WO-A1-2007/037223
JP-A- 2006 333 981
JP-A- 2006 297 146
US-A- 6 162 229
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Technical Field



    [0001] The present invention relates to an intraocular lens insertion device for controlling movement of the intraocular lens used to implant an intraocular lens into an eye in place of a crystalline lens removed in cataract surgery.

    Background Art



    [0002] In cataract surgery, there has been widely performed removal of opacified crystalline lenses by phacoemulsification and aspiration (PEA) followed by implantation of intraocular lenses into aphakic eyes. There are two types of intraocular lens: a hard intraocular lens whose optic is made of a hard material such as PMMA and a soft intraocular lens whose optic is made of a flexible material such as silicone elastomer, soft acrylic or hydrogel.

    [0003] Upon use of a hard intraocular lens, the lens needs to be inserted through an incision having been cut in a cornea or sclera in a width approximately the same as the diameter of the optic of the lens. On the other hand, upon use of a soft intraocular lens, the lens can be inserted through an incision smaller than the diameter of the optic of the lens by folding the optic.

    [0004] In order to reduce the risk of post-surgery corneal astigmatism or infection, insertion of a lens through a small incision is preferable. Consequently, soft intraocular lenses tend to be preferred now. There are three types of soft intraocular lens: Type 50 whose optic is made of a soft material and supporting portions are made of a hard material such as PMMA (generally, this type of intraocular lens has two thin filament-shaped supporting portions (Fig. 9 (A)) ; Type 51 whose optic and supporting portions are made of the same soft material (generally, this type of intraocular lens has plate-like supporting portions (Fig. 9(B)); and Type 52 which has two or more thin plate-like supporting portions (Fig. 9(C)).

    [0005] In addition, a dedicated intraocular lens insertion device having a mechanism to lead an intraocular lens to an eye through a slender tube is used in some cases in order to insert intraocular lenses into eyes. By using such an intraocular lens insertion device, an intraocular lens can be inserted through an incision opening smaller than 3 mm.

    [0006] In recent years, in order to eliminate the possibility of bacterial contamination or operational error in handling intraocular lenses, an intraocular lens insertion device where an intraocular lens is set beforehand and which can be packaged and stored has been developed.

    [0007] With such an intraocular lens insertion device, however, there was a problem that a supporting portion arranged in the backward direction of a lens advancing axis (hereinafter, referred to as a trailing supporting portion) got caught in the gap between a plunger for pushing out the intraocular lens and an inner wall of a passage of the insertion device or entangled in the plunger in a process of movement of the intraocular lens. Such a problem is brought to the fore especially with a soft intraocular lens having thin filament-shaped supporting portions or a soft intraocular lens having thin plate-like supporting portions.

    [0008] In such an intraocular lens insertion device, if the trailing supporting portion stretches in a process of movement of the intraocular lens, the trailing supporting portion is left outside of the eye when the lens is inserted through a small incision in the eye. Therefore, after the lens is pushed by the plunger, a repeated operation for inserting the trailing supporting portion into the eye is required, and it takes time and labor in surgery. In some cases, while the intraocular lens is moving inside the intraocular lens insertion device, the optic and the trailing supporting portion interfere with each other, resulting in damage or breakage of the optic or the trailing supporting portion.

    [0009] Therefore, when an intraocular lens is inserted into an eye using the intraocular lens insertion device, the behavior of the trailing supporting portion of intraocular lens needs to be controlled appropriately in a process of movement of the intraocular lens.

    [0010] In view of the foregoing problems, a lens insertion tool which has a side clearance provided at the distal end of a plunger for accommodating a trailing supporting portion to prevent damage to the trailing supporting portion has been disclosed (Patent Document 1, for example). A lens insertion tool provided with a relief channel for a trailing supporting portion at the lower side of a plunger has been also disclosed (Patent Document 2, for example). Furthermore, a lens insertion tool wherein a plunger pushes a trailing supporting portion up a ramp and bends haptics up and over IOL has been disclosed (Patent Document 3, for example). Thus, the above-mentioned Patent Documents can reduce getting caught of a trailing supporting portion of intraocular lens having thin filament-shaped or plate-like supporting portions.

    Patent Document 1: Japanese Translation of PCT International Application No. 11-506357

    Patent Document 2: US Patent No. 6733507

    Patent Document 3: Japanese Unexamined Patent Publication No. 2004-351196

    Patent Document 4: US Patent Application Publication No. 6162229

    Patent Document 5: European Patent Application Publication No. 1941846


    Disclosure of the Invention


    Problems to be Solved by the Invention



    [0011] The above-mentioned Patent Documents 1 and 2, however, still have a problem that the trailing supporting portion relieved into a clearance at the distal end of plunger or a relief channel for a trailing supporting portion stretches and the trailing supporting portion is left outside of the incision when the intraocular lens is inserted through a small incision of the eye. Especially, an intraocular lens having thin plate-like supporting portions which are made of thick soft members has a problem that it takes time and labor to conduct a repeated operation. In the foregoing Patent Document 3, too, there are concerns that while an intraocular lens is moved further through the nozzle after the haptics are bent up and over IOL, the trailing supporting portion may be compressed into an unexpected shape, causing a breakage of the trailing supporting portion, a trouble during insertion, or a state of the folded trailing supporting portion accommodated in the intraocular lens not returning to a desired shape after insertion into an eye.

    [0012] Patent Document 4 describes a deformable intraocular lens injecting apparatus having a movable plunger with a deformable plunger tip, preferably a resiliently deformable plunger tip. In a preferred embodiment, the plunger tip is made of soft resiliently deformable material to prevent any surface or internal damage to the deformable intraocular lens being forced through a delivery passageway of the lens injecting apparatus.

    [0013] Patent Document 5describes an intraocular lens insertion device for inserting an intraocular lens capable of pushing out the lens by a simple structure. An intraocular lens insertion device comprises: a main body having a lens placement portion on which the lens with a pair of loop parts at its optic part is placed, a transition portion deforming the lens, and a nozzle portion discharging the lens; and a lens push-out mechanism pushing out the lens placed on the lens placement portion. The lens push-out mechanism comprises a plunger pushing out the lens and a slider having a lens contact part larger than the plunger. The slider comprises an operating part projected to the outside of the body.

    [0014] In view of the foregoing problems, an object of the present invention is to provide an intraocular lens insertion device which can appropriately control the behavior of a trailing supporting portion in a process of movement of the intraocular lens and can reduce the possibility of a repeated operation after insertion of the intraocular lens into an eye. Means for Solving the Problems

    [0015] The inventor of the present application conducted studies over and over again and found that the above-mentioned object could be achieved by folding an optic and supporting portions individually while minimizing the interference of the optic and the supporting portions during movement of the intraocular lens.

    [0016] This object is achieved by the subject-matter according to the independent claim 1. The dependent claims refer to preferred embodiments of the invention. According to an aspect of the invention an intraocular lens insertion device for use with an intraocular lens, which includes an optic having an outer edge and a pair of support portions with proximal ends at the outer edge and tips, comprises: a lens setting part including an inner wall defining passage configured to hold the intraocular lens with the optic folded, the support portion forward of the optic, the support portion backward of the optic , which is a trailing support portion, the proximal ends of the support portions located opposite the fold in the optic and the tips of the support portions hanging down on one side as they move in the forward and backward directions of a lens advancing axis across the optic, respectively; a nozzle; a plunger, including a pushing rod with a distal end, a lens contact portion at the distal end of the pushing rod, and a plunger pushing portion connected to the lens contact portion at the distal end of the pushing rod, movable in a forward direction to push the intraocular lens out of the lens setting part and through the nozzle; wherein the top surface of the plunger pushing portion includes a groove extending in the backward direction from the lens contact portion and guides provided on both sides of the groove in parallel with the lens advancing axis; and wherein forward movement of the plunger and the lens contact portion causes the trailing support portion which is hanging down to one side to be bent at its tip in the forward direction, guided into the groove and caught by the plunger pushing portion, and, when the plunger is pushed further, the lens contact portion abuts against an the outer edge of the optic intraocular lens and moves the intraocular lens forward.

    [0017] According to an aspect of the invention the pushing portion includes a supporting portion abutting face that abuts against the trailing support portion that is deformed.

    Effect of the Invention



    [0018] According to an aspect of the present invention, the pushing portion provided on the plunger moves an intraocular lens forward with the supporting portion being caught, thereby preventing the supporting portion from stretching backward as the intraocular lens is moving forward. Therefore, with this intraocular lens insertion device, the supporting portions can be inserted together with the optic into an eye through an incision at one operation, thereby omitting a repeated operation after the intraocular lens was inserted into the eye.

    [0019] According to an aspect of the present invention, the optic and the supporting portion arranged in the backward direction of the lens advancing axis are prevented from being damaged or broken while the intraocular lens is moving.

    [0020] According to an aspect of the present invention, the intraocular lens is moved forward with a minimum of interference of the optic and the supporting portion arranged in the backward direction of the lens advancing axis, thereby preventing the optic and the trailing supporting portion from being damaged or broken while the intraocular lens is moving.

    [0021] According to an aspect of the present invention, the supporting portion arranged in the backward direction of the lens advancing axis is prevented from dropping off in a process of movement of the intraocular lens, resulting in a more reliable control of the supporting portion.

    [0022] According to an aspect of the present invention, the supporting portion arranged in the backward direction of the lens advancing axis is pushed out by the supporting portion abutting face and can be inserted into the eye, thereby ensuring that a repeated operation after insertion of the lens into the eye can be omitted.

    [0023] According to an aspect of the present invention, the supporting portion can be caught with a simple configuration.

    [0024] According to an aspect of the present invention, the pushing portion provided on the plunger moves the intraocular lens forward with the supporting portion being caught, thereby preventing the supporting portion from stretching as the intraocular lens moves forward. Therefore, the intraocular lens insertion device enables the supporting portions to be inserted together with the optic into an eye through an incision at one operation. Thus, the intraocular lens insertion device can omit a repeated operation after insertion of the intraocular lens into the eye.

    [0025] According to an aspect of the the present invention, the supporting portion can be more surely prevented from stretching backward as the intraocular lens moves forward.

    Brief Description of the Drawings



    [0026] 

    FIG. 1 shows the overall configuration of an intraocular lens insertion device of the present invention.

    FIG. 2 is a perspective view showing the configuration of a cartridge of the same as above.

    FIG. 3 is a perspective view showing the configuration of a main body of the same as above.

    FIG. 4 is a partial perspective view showing the configuration of a plunger of the same as above.

    FIG. 5 is a sectional view showing a state of use of the same as above, in which (A) is a view showing that a plunger abuts against a supporting portion, (B) is a view showing that a plunger catches a supporting portion, and (C) is a view showing that a plunger abuts against an optic.

    FIG. 6 is a sectional view showing a state of use of a modified example of the same as above, in which (A) is a view showing that a plunger abuts against a supporting portion, (B) is a view showing that a plunger catches a supporting portion, and (C) is a view showing that a plunger abuts against an optic.

    FIG. 7 is a view showing a modified example of a plunger of the same as above.

    FIG. 8 is a view showing another modified example of a plunger of the same as above.

    FIG. 9 shows an intraocular lens of the present invention, in which (A) is a view showing a type of intraocular lens having filament-shaped supporting portions, (B) is a view showing a type having a plate-like supporting portion and (C) a view showing a type having thin plate-like supporting portions.


    Best Mode for Carrying Out the Invention



    [0027] Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

    1. Embodiment


    (1) General structure



    [0028] An intraocular lens insertion device 1 shown in FIG. 1 has a cartridge 2, a main body 3 and a plunger 4. The cartridge 2 is installed to the main body 3 after an intraocular lens 5 is set on the cartridge. On the other hand, the plunger 4 is provided so that it can move in the forward and backward directions of the lens advancing axis A inside the main body 3. The intraocular lens insertion device 1 having such a configuration is generally configured to push out the intraocular lens 5 set in the cartridge 2 by using the plunger 4 and to release the intraocular lens 5 from the end of the cartridge 2 into an eye.

    [0029] For reference's sake, an intraocular lens insertion device 1 may be made of various materials. For example, synthetic resin may be used for all portions of the tool, thereby allowing easy mass production; or metal such as titanium may be used. The intraocular lens 5 also has an optic 6 and a pair of thin plate-like supporting portions 7a,7b disposed at the outer edge of the optic 6.

    [0030] Hereinafter, each configuration will be described in detail. In the description below, the forward direction of the lens advancing axis A is simply referred to as "forward" and the backward direction of the lens advancing axis A is simply referred to as "backward".

    [0031] As shown in FIG. 2, the cartridge 2 comprises: a cartridge main body 14 having an insertion opening 10, a lens setting part 11, a transition part 12 and a nozzle 13 in the order along the lens advancing axis A; and wing portions 15, 15 extending from both sides of the cartridge main body 14. At the insertion opening 10, an insertion groove 16 which was formed by notching in the direction of the lens advancing axis A is provided. In the forward direction of the lens advancing axis A of the insertion opening 10, a lens setting part 11 is provided. In the forward direction of the lens advancing axis A of the lens setting part 11, the transition part 12 is provided. The inner wall of the transition part 12 has a mortar shape tapering toward the distal end and communicates with a nozzle 13 at the distal end. With this configuration, the cartridge main body 14 is formed so that it can move from the lens setting part 11 to the transition part 12, and then, from the transition part 12 to the nozzle 13 when the intraocular lens 5 mounted on the lens setting part 11 through the insertion opening 10 is pushed by the plunger 4. The nozzle 13 is formed so that it has an outside diameter sized to be inserted into the incision opening (not shown) . The bore of the cartridge 2 is formed so that it has an oval shape at the insertion opening 10, converging into a perfect circle toward the proximal end of the nozzle 13 .

    [0032] As shown in FIG. 3, the main body 3 comprises an attachment portion 20 for removably attaching the cartridge 2, a flange 21 for locking the fingers of the operator, and a tubular body 24 connecting the attachment portion 20 and the flange 21. The attachment portion 20 is provided at the distal end of the main body 3 formed into a semicircle shape and comprises guide passages 22,22 for guiding the wing portions 15,15 of the cartridge 2 and locking pieces 23,23 provided forward of the lens advancing axis A of the guide passages 22,22. The locking pieces 23,23 are configured so that it can lock the front ends of the wing portions 15,15 of the cartridge 2. The flange 21 is provided on the outer surface of the proximal end of the main body 3.

    [0033] Next, a plunger 4 which is a characteristic component of the present invention will be described in detail. As shown in FIG. 1, the plunger 4 comprises a pushing rod 30 for pushing out the intraocular lens 5, a pressing portion 31 provided at the proximal end of the pushing rod 30 and a lens contact portion 32 provided at the distal end of the pushing rod 30. This plunger 4 is installed into the main body 3 in such a manner as to move forward or backward along the lens advancing axis A inside the main body 3. The plunger 4 installed into the main body 3 is configured so that the operator can push out the intraocular lens 5 by pushing the pressing portion 31 and bringing the lens contact portion 32 into contact with the intraocular lens 5 mounted on the lens setting part 11.

    [0034] As shown in FIG. 4, the plunger has a lens contact portion 32 and a pushing portion 33 connected to the lens contact portion 32 at the distal end of the pushing rod 30.

    [0035] The lens contact portion 32 is formed by a vertical plane relative to the lens advancing axis A. The pushing portion 33 catches the supporting portion (hereinafter referred to as the trailing supporting portion) 7b arranged in the backward direction of the lens advancing axis A and moves the trailing supporting portion 7b together with the optic 6 without separating from the optic 6. The pushing portion 33 is provided on one side of the lens contact portion 32 and comprises a groove 34 extending in the backward direction from the distal end of the pushing rod 30, guides 35,35 provided on both sides of the groove 34 in parallel with the lens advancing axis A, and a supporting portion abutting face 36. In this embodiment, the groove 34 has a concave bottom face and connects to the guides 35,35 at the opening end of the side face 34b converging from the opening toward the bottom face 34a. These guides 35,35 are provided at both sides of the groove 34 and formed into a columnar shape, and their ends form part of the lens contact portion 32. The supporting portion abutting face 36 is provided so that a deformed trailing supporting portion 7b can abut against it. This supporting portion abutting face 36 is formed with a plane which slants backward as it goes upward from the surface of the groove 34, and blocks the backward end of the groove 34.

    [0036] The plunger 4 having such a configuration is attached to the main body 3, as shown in FIG. 1, by inserting the lens contact portion 32, first, in the proximal end of the main body 3 and by positioning the lens contact portion 32 at the distal end of the main body 3 and the pressing portion 31 at the proximal end of the main body 3.

    (2) Operation and effect



    [0037] Next, the operation and effect of the above-mentioned intraocular lens insertion device 1 will be described with reference to the accompanying drawings . The views on the right of FIG. 5 are sectional views of the vicinity of the lens setting part 11 of the cartridge 2, and the views on the left show each cross section of the right views.

    [0038] First, the intraocular lens 5 folded into two by use of tweezers (not shown) is inserted through the insertion opening 10, and then the intraocular lens 5 is set on the lens setting part 11 of the cartridge 2 pre-filled with ophthalmic viscoelastic material. At this time, the intraocular lens 5 is set with a pair of supporting portions 7a, 7b arranged in the forward and backward directions, respectively, relative to the optic 6 (FIG. 5 (A)). The intraocular lens 5 is positioned with the folded optic 6 arranged on one side and the proximal ends of the supporting portions 7a,7b arranged on the other side, respectively. The tips of the supporting portions 7a,7b hang down on one side as they move in the forward and backward directions across the optic 6, respectively. Furthermore, the intraocular lens 5 which is folded into two comes into contact with the bore of the cartridge 2 formed into an oval shape, and accordingly, the supporting portions 7a,7b are arranged along the side wall of the bore.

    [0039] Next, the cartridge 2 having the intraocular lens 5 mounted on the lens setting part 11 is attached to the attachment portion 20 of the main body 3 by sliding forward of the lens advancing axis A with the wing portions 15,15 mounted on the guide passages 22,22 and locking the front ends of the wing portions 15,15 with the locking pieces 23,23.

    [0040] After the cartridge 2 is attached to the main body 3, the nozzle portion 13 is first inserted into an eye through the incision opening (not shown) by the operator.

    [0041] On the other hand, the plunger 4 moves forward when the operator pushes the pressing portion 31. When the plunger 4 moves forward, the lens contact portion 32 provided at the distal end of the pushing rod 30 comes in contact with the tip of the trailing supporting portion 7b (FIG. 5 (A)). At this time, the trailing supporting portion 7b is positioned along the bore of the cartridge 2 and comes in contact with the trailing supporting portion 7b at the distal end of the guides 35,35.

    [0042] Furthermore, when the plunger 4 is pushed and the lens contact portion 32 moves forward, the trailing supporting portion 7b which is hanging down to one side is bent at its tip in the forward direction (FIG. 5(B)). At the same time, the trailing supporting portion 7b is guided into the central groove 34 by the side face 34b converging from the opening toward the bottom face 34a. In this way, the pushing portion 33 catches the trailing supporting portion 7b by supporting the tip of the trailing supporting portion 7b from one side by the groove 34.

    [0043] The plunger 4, by which the trailing supporting portion 7b was caught at the pushing portion 33, is pushed further, and the lens contact portion 32 abuts against the outer edge of the intraocular lens 5 and moves the intraocular lens 5 forward (FIG. 5(C)). The intraocular lens 5 moving in the cartridge 2 is pushed inward by the inner wall of the transition part 12 and folded to a smaller size. In this way, the intraocular lens insertion device 1 releases the compactly folded intraocular lens 5 from the tip of the nozzle 13.

    [0044] In the conventional intraocular lens insertion device 1, as the intraocular lens 5 moves forward, the trailing supporting portion 7b stretches backward. Therefore, by using the conventional intraocular lens insertion device 1, the trailing supporting portion 7b is left outside of the incision when the intraocular lens 5 is inserted through a small incision of an eye, and a repeated operation was needed to insert the trailing supporting portion 7b left outside of the incision into the incision.

    [0045] In contrast, in the intraocular lens insertion device 1 according to this embodiment, the pushing portion 33 provided on the plunger 4 moves the intraocular lens 5 forward with the trailing supporting portion 7b being caught, thereby preventing the trailing supporting portion 7b from stretching backward as the intraocular lens 5 moves forward. Thus, the intraocular lens insertion device 1 allows the pushing portion 33 to move the intraocular lens 5 without separating the trailing supporting portion 7b from the optic 6 and enables the trailing supporting portion 7b and the optic 6 to be inserted into the eye through the incision at one operation. Therefore, the intraocular lens insertion device 1 can omit a repeated operation after the intraocular lens 5 was inserted into the eye.

    [0046] In addition, the supporting portion abutting face 36 abuts against the trailing supporting portion 7b. By pushing out the trailing supporting portion 7b by the supporting portion abutting face 36, the trailing supporting portion 7b can be inserted into the eye. Thus, the intraocular lens insertion device 1 can omit a repeated operation more surely after the intraocular lens 5 was inserted into the eye.

    [0047] As mentioned above, the plunger 4 is provided with a pushing portion 33 for pushing out the trailing supporting portion 7b, besides a lens contact portion 32, thereby folding the trailing supporting portion 7b and the optic 6, separately. Therefore, the intraocular lens insertion device 1 can move the intraocular lens 5 forward, keeping interference of the trailing supporting portion 7b and the optic 6 at a minimum level. Thus, the intraocular lens insertion device 1 can reduce interference of the optic 6 and the trailing supporting portion 7b during movement of the intraocular lens 5, thereby preventing the optic 6 and the trailing supporting portion 7b from being damaged or broken.

    [0048] As mentioned above, in this embodiment, the guides 35,35 are formed into a columnar shape, and they can guide the trailing supporting portion 7b in contact with the distal ends of the guides 35,35 to the groove 34 without causing damage.

    [0049] This pushing portion 33 is formed by the groove 34, thereby catching the trailing supporting portion 7b with such a simple structure. Also, the groove 34 has a concave bottom face and can guide the trailing supporting portion 7b in contact with the guides 35,35 smoothly in the groove 34 in the center.

    [0050] In addition, the bottom face of the groove 34 on the pushing portion 33 is formed by a concave face, thereby catching the trailing supporting portion 7b guided to the groove 34 without causing damage.

    [0051] Furthermore, as the pushing portion 33 is provided with the guides 35,35, it can prevent the caught trailing supporting portion 7b from falling off in the process of movement of the intraocular lens 5 and control the trailing supporting portion 7b with more reliability.

    2. Modified example of cartridge



    [0052] The difference between the cartridge 40 shown in FIG. 6 and the above embodiment lies in only the bore shape. With regard to this cartridge 40, when the side of the bore where the optic 6 of the intraocular lens 5 folded into two is placed is regarded as one side 12a, the other side 12b has a smaller width compared to the one side 12a. The right views of FIG. 6 show the cross sections of the vicinity of the lens setting part 11 on the cartridge 40 and the left views show each cross section of the right views.

    [0053] In this modified example, when the operator pushes the pressing portion 31, the plunger 4 moves forward and the lens contact portion 32 provided at the distal end of the pushing rod 30 abuts against the tip of the trailing supporting portion 7b (FIG. 6 (A)). The trailing supporting portion 7b is pushed by the inner wall of the other side 12b in the bore of the cartridge 40 having a smaller width compared with the one side 12a which is the side of the optic 6 of the intraocular lens 5 placed on the cartridge and is placed in the vicinity of the center of the bore. As a result, the trailing supporting portion 7b comes in contact with the center of the pushing portion 33, that is, the groove 34.

    [0054] When the plunger 4 is pushed further and the lens contact portion 32 moves forward, the trailing supporting portion 7b hanging down to the one side 12a is bent in the forward direction at its tip (FIG. 6 (B)). At the same time, the trailing supporting portion 7b is guided into the groove 34 in the center by the side face 34b converging from the opening toward the bottom face 34a. In this way, the pushing portion 33 catches the trailing supporting portion 7b by supporting the tip of the trailing supporting portion 7b from the one side 12a by the groove 34.

    [0055] When the plunger 4 which caught the trailing supporting portion 7b at the pushing portion 33 is further pushed, the lens contact portion 32 abuts against the outer edge of the intraocular lens 5 and the intraocular lens 5 is moved forward (FIG. 6 (C)). In this way, the cartridge 40 according to this modified example has a bore whose width of the other side 2b is smaller than that of the one side 12a, allowing the trailing supporting portion 7b to be guided to the groove 34 in the center more easily than the above embodiment.

    3. Modified example of plunger



    [0056] The plunger 4 shown in FIG. 7 is different from the above embodiment in the structure of a pushing portion. More specifically, the pushing portion 50 according to this modified example is formed into a rectangular parallelepiped shape defined by a groove 51 and guides 52,52 integrally set up on both sides of the groove 34. The distal ends of the guides 52, 52 form part of the lens contact portion 32. The bottom face 51a of the groove 51 is formed by a flat plane, and a pair of guides 52,52 formed on both sides of the groove 51 have a rectangular parallelepiped shape. The corners of these guides 52,52 are processed into round shape. Though this modified example has a simple shape compared to the above embodiment, it has an effect of omitting a repeated operation after the intraocular lens 5 was inserted into an eye.

    [0057] In addition, the plunger 60 shown in FIG. 8 is provided with a scooping face 61 at the lens contact portion 32 on the pushing portion 50 shown in FIG. 7. Providing such a scooping face 61 at the lens contact portion 32 can prevent the distal end of the plunger 4 from running on the optic 6 in the process of movement of the intraocular lens 5. In this modified example, the same effect as the above embodiment can be obtained by providing the pushing portion 50.

    [0058] The present invention is not limited to the embodiment described above, and various modifications can be made thereto within the scope of the present invention. For example, in the above-mentioned embodiment, the transition part of the main body has a mortar shape tapering toward the distal end, and the intraocular lens 5 is folded into a small size by passing through the transition part. The present invention, however, is not limited to this embodiment, but applies to the main body having a simple cylindrical transition part.

    [0059] According to the above-mentioned embodiment, the supporting portions are thin plates. The present invention, however, is not limited to this embodiment, but applies to an intraocular lens having thin filament-shaped supporting portions.


    Claims

    1. An intraocular lens insertion device for use with an intraocular lens (5) including an optic (6) having an outer edge and a pair of support portions (7a, 7b) with proximal ends at the outer edge and tips, the intraocular lens insertion device comprising:

    a lens setting part (11) including an inner wall defining passage configured to hold the intraocular lens (5) with the optic (6) folded, the support portion (7a) forward of the optic (6), the support portion (7b) backward of the optic (6), which is a trailing support portion (7b), the proximal ends of the support portions (7a, 7b) located opposite the fold in the optic (6) and the tips of the support portions (7a, 7b) hanging down on one side as they move in the forward and backward directions of a lens advancing axis across the optic (6), respectively;

    a nozzle (13);

    a plunger (4), including a pushing rod (30) with a distal end, a lens contact portion (32) at the distal end of the pushing rod (30), and a plunger pushing portion (33, 50) connected to the lens contact portion (32) at the distal end of the pushing rod (30), movable in a forward direction to push the intraocular lens (5) out of the lens setting part (11) and through the nozzle (13);

    characterized in that:
    the top surface of the plunger pushing portion (33, 50) includes a groove (34, 51) extending in the backward direction from the lens contact portion (32) and guides (35; 52) provided on both sides of the groove (34, 51) in parallel with the lens advancing axis; such that a forward movement of the plunger (4) and the lens contact portion (32) causes the trailing support portion (7b), which is hanging down to one side, to be bent at its tip in the forward direction, to be guided into the groove (34, 51) and caught by the plunger pushing portion (33, 50), and, when the plunger (4) is pushed further, the lens contact portion (32) abuts against an outer edge of the optic (6) and moves the intraocular lens (5) forward.


     
    2. The intraocular lens insertion device according to claim 1, wherein the pushing portion (33, 50) has a supporting portion abutting face (36) that abuts against the trailing support portion (7b) that is deformed.
     


    Ansprüche

    1. Intraokulare Linseneinsetzvorrichtung zur Verwendung mit einer intraokularen Linse (5), die eine Optik (6) mit einem äußeren Rand und einem Paar von Stützabschnitten (7a, 7b) mit proximalen Enden am äußeren Rand und Spitzen aufweist, wobei die intraokulare Linseneinsetzvorrichtung umfasst:

    ein Linseneinstellteil (11) mit einer Innenwand, die einen Durchgang definiert, der so ausgelegt ist, dass er die Intraokularlinse (5) bei gefalteter Optik (6) hält, wobei der Stützabschnitt (7a) vor der Optik (6) liegt, der Stützabschnitt (7b) hinter der Optik (6) liegt, was ein nachlaufender Stützabschnitt (7b) ist, wobei die proximalen Enden der Stützabschnitte (7a, 7b) gegenüber der Falte in der Optik (6) angeordnet sind und die Spitzen der Stützabschnitte (7a, 7b) an einer Seite herabhängen, wenn sie sich in Vorwärts- bzw. Rückwärtsrichtung einer Linsenvorschubachse über die Optik (6) bewegen;

    eine Düse (13);

    einen Kolben (4), der eine Schubstange (30) mit einem distalen Ende, einen Linsenkontaktabschnitt (32) am distalen Ende der Schubstange (30) und einen mit dem Linsenkontaktabschnitt (32) am distalen Ende der Schubstange (30) verbundenen Kolbenschiebeabschnitt (33, 50) aufweist, der in einer Vorwärtsrichtung bewegt werden kann, um die intraokulare Linse (5) aus dem Linseneinstellteil (11) und durch die Düse (13) zu drücken;

    dadurch gekennzeichnet, dass

    die obere Fläche des Kolbenschiebeabschnitts (33, 50) eine Nut (34, 51), die sich in der Rückwärtsrichtung von dem Linsenkontaktabschnitt (32) aus erstreckt, und Führungen (35; 52) aufweist, die auf beiden Seiten der Nut (34, 51) parallel zur Linsenvorschubachse vorgesehen sind; sodass eine Vorwärtsbewegung des Kolbens (4) und des Linsenkontaktabschnitts (32) bewirkt, dass der hintere Stützabschnitt (7b), der auf einer Seite herabhängt, an seiner Spitze in Vorwärtsrichtung gebogen wird, in die Nut (34, 51) geführt und von dem Kolbenschiebeabschnitt (33, 50) erfasst wird, und, wenn der Kolben (4) weiter geschoben wird, der Linsenkontaktabschnitt (32) an einen äußeren Rand der Optik (6) anstößt und die intraokulare Linse (5) vorwärts bewegt.


     
    2. Intraokulare Linseneinsetzvorrichtung nach Anspruch 1, wobei der Schiebeabschnitt (33, 50) eine Stützabschnitt-Anlagefläche (36) aufweist, die am nachlaufenden Stützabschnitt (7b) anliegt, der verformt wird.
     


    Revendications

    1. Dispositif d'insertion de lentille intraoculaire destiné à être utilisé avec une lentille intraoculaire (5) incluant une optique (6) ayant un bord extérieur et une paire de parties de support (7a, 7b) avec des extrémités proximales sur le bord extérieur et des pointes, le dispositif d'insertion de lentille intraoculaire comprenant :

    une partie de placement de lentille (11) incluant un passage définissant une paroi intérieure configuré pour retenir la lentille intraoculaire (5) avec l'optique (6) pliée, la partie de support (7a) à l'avant de l'optique (6), la partie de support (7b) à l'arrière de l'optique (6), qui est une partie de support arrière (7b), les extrémités proximales des parties de support (7a, 7b) situées à l'opposé du pli dans l'optique (6) et les pointes des parties de support (7a, 7b) étant suspendues d'un côté à mesure qu'elles se déplacent dans les directions avant et arrière d'un axe d'avancement de lentille à travers l'optique (6), respectivement ;

    une buse (13) ;

    un plongeur (4), incluant une tige de poussée (30) avec une extrémité distale, une partie de contact de lentille (32) à l'extrémité distale de la tige de poussée (30), et une partie de poussée de plongeur (33, 50) reliée à la partie de contact de lentille (32) à l'extrémité distale de la tige de poussée (30), mobile dans une direction avant pour pousser la lentille intraoculaire (5) hors de la partie de placement de lentille (11) et à travers la buse (13) ;

    caractérisé en ce que :
    la surface supérieure de la partie de poussée de plongeur (33, 50) inclut une rainure (34, 51) s'étendant dans la direction vers l'arrière à partir de la partie de contact de lentille (32) et des guides (35 ; 52) prévus sur les deux côtés de la rainure (34, 51) en parallèle à l'axe d'avancement de lentille ; de telle façon qu'un mouvement vers l'avant du plongeur (4) et de la partie de contact de lentille (32) fait que la partie de support arrière (7b) qui est suspendue d'un côté, soit courbée à sa pointe dans la direction avant, pour être guidée jusque dans la rainure (34, 51) et prise par la partie de poussée de plongeur (33, 50), et, lorsque le plongeur (4) est poussé plus loin, la partie de contact de lentille (32) vient à l'affleur contre un bord extérieur de l'optique (6) et déplace la lentille intraoculaire (5) vers l'avant.


     
    2. Dispositif d'insertion de lentille intraoculaire selon la revendication 1, dans lequel la partie de poussée (33, 50) présente une face d'affleurement de partie de support (36) qui vient à l'affleur contre la partie de support arrière (7b) qui est déformée.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description