KR19980702942A - Deformable intraocular lens injector - Google Patents

Abstract

The present invention is a surgical implant device (10) for inserting a deformable intraocular lens (54) into the eye through a relatively small incision of eye tissue, the distal contact (58b) of the intraocular lens (54) deformable without damage during insertion. A lens with a plunger 16 having a plunger tip 20 formed to provide a lateral clearance between the lens insertion passage P through the surgical implant device 10 and the plunger tip 20 to accommodate the Injector 13 is included.

Description

Deformable intraocular lens injector

The STAAR Surgical Company, California, USA, has been manufacturing deformable intraocular lenses since the early 1980s. Dr. Mozzocco of Star Surgical Company invented and patented the most commercially successful deformable intraocular lens. In addition, Dr. Mojoko has developed various implantable devices and methods (ie, techniques) for an intraocular lens that is deformable.

Star Surgical Company started selling a surgical implantable device for deformable intraocular lenses in 1986, which included a device that began to be known as a star shooter for use with a disposable plastic lens cartridge. Prior art star shooters are shown in FIGS. 34-40. In particular, it is important for the apparatus that the plunger tip has a cylindrical and flat circular end face as shown in FIG.

Star shooter devices have been used in tens of thousands of deformable intraocular lens implantation surgeries performed by surgeons throughout the United States and around the world. However, even if the operating performance of the star shooter device is good and has been used highly by practitioners, there is a possibility that the device may malfunction. For example, although the incidence is low, it is sometimes caught and damaged between the inner wall of the lens cartridge through passage and the plunger tip while the distal contact of the deformable intraocular lens is inserted. In particular, as there is a small gap between the inner wall of the lens cartridge through passage and the outer diameter of the plunger tip, there is a possibility that the distal contact portion is inserted into the empty space formed by the small gap, and as the plunger tip is forced through the lens cartridge passage. The distal contacts become more wedge shaped. As described above, as the end contact becomes wedge-shaped, the end contact is permanently deformed due to the significant tension and shear stress applied to the end contact.

In addition, when the deformable intraocular lens is improperly loaded in the lens cartridge, there is a possibility that the end contact is damaged by the star shooter. In particular, the distal contact of the fully deformable intraocular lens needs to be loaded into the lens cartridge before loading the lens cartridge into the lens injector. There is also the possibility of improper loading of the deformable intraocular lens and distal contact, which extends at least partially out of the lens cartridge passage by the surgeon or surgical assistant staff. When the deformable intraocular lens is improperly loaded in this manner, the distal contact is caught between the circular edge of the passage opening and the circular edge of the end face of the plunger tip and is likely to be damaged by the plunger tip of the star shooter. If the distal contact is hooked in this manner and additional force is applied to the plunger, the circular edge of the end face of the plunger tip and the circular edge of the passage opening can cut the distal contact, thereby permanently damaging the distal contact.

Such and other situations are also likely to permanently damage the terminal contact. Permanent damage to the distal contact is a major loss, since the deformable intraocular lens damaged at the distal contact must be discarded. In addition, if the operator does not recognize that the distal contact is damaged during insertion, the distal contact damage of the deformable intraocular lens may damage the patient's eye and cause complications, and should be recovered later.

The present invention is part of the US patent application Ser. No. 08 / 221,013, filed April 1, 1994, entitled Partially Informable Deformable Intraocular Lens Insertion Apparatus (CIP), said CIP application US Patent Application No. 07 / 953,251, filed Sep. 30, 1992, which is now abandoned, is a continuing application of the name guide lens insertion apparatus of the invention.

The present invention relates to a deformable intraocular lens injector for use with a lens cartridge. In particular, it relates to a tip structure of a plunger of a deformable intraocular lens injector formed to prevent damage to the distal haptic of the deformable intraocular lens to be loaded into a lens cartridge disposed in the lens injector.

1 is a perspective view of one embodiment of a surgical implant device in accordance with the present invention having an implantable lens injector with a flange cartridge disposed thereon for placing a deformable intraocular lens in the eye;

Figure 2 is a perspective view of the surgical implant device shown in Figure 1 with the plunger in the retracted position and the lens cartridge removed;

3 is a side view of the surgical implant device shown in FIG. 2, with the plunger in an advanced position;

4 is a side view of the surgical implant device shown in FIG. 1;

5 is a detailed longitudinal cross-sectional view of the surgical implant device shown in FIG. 4;

6 is a detailed cross-sectional view of the surgical implant device shown in FIG. 5;

7 is a cross-sectional view of the end of the surgical implant device shown in FIG. 5;

8 is a detailed enlarged view of the left side of the plunger tip in the specific orientation shown in FIG. 1;

9 is a detailed enlarged view of the distal end portion shown in FIG. 8;

10 is an enlarged detail of the upper surface of the plunger tip,

FIG. 11 is an enlarged detail of the right side of the plunger tip in the specific orientation shown in FIG. 4; FIG.

12 is a detailed enlarged view of the bottom of the plunger tip in the specific orientation shown in FIG.

Figure 13 is a perspective view of a deformable intraocular lens used in the present invention,

14 is a perspective view of another type of deformable intraocular lens used in the present invention;

15 is a side view of the lens shown in FIG. 13;

Fig. 16 is a perspective view of the lens cartridge opened to load the deformable intraocular lens;

16A is a perspective view of another type of open lens cartridge;

Figure 17 is a sectional view of the rear end of the lens cartridge opened;

18 is a sectional view of the front end of the lens cartridge opened;

Fig. 19 is a sectional view of the rear end of the closed lens cartridge;

20 is a sectional view of the front end of a closed lens cartridge;

20A is a detailed cross sectional view of the nozzle portion end showing three slots of different lengths spaced at equal intervals around the circumference of the tip portion;

Fig. 20B is a detailed perspective view of the tip portion showing three slots of different lengths;

21 is a plan view of an open lens cartridge;

Fig. 22 is a side view of the lens cartridge opened;

Figure 23 is a sectional view of the rear end of the closed lens cartridge;

Fig. 24 is a partial sectional view showing the lens cartridge with the plunger withdrawn;

Fig. 25 is a partial sectional view showing the lens cartridge with the plunger partially advanced;

Fig. 26 is a partial sectional view showing the lens cartridge in which the plunger is fully advanced;

27 is a perspective view showing an apparatus for arranging a deformable intraocular lens in the eye;

Fig. 28 is a sectional view showing a state where an intraocular lens that is deformable is placed in place of an eye by a surgical implant device;

Fig. 29 is a sectional view showing a state where a deformable intraocular lens is disposed at an incorrect position of an eye by a surgical implant device;

30 is a side view of a modification of the lens cartridge provided with the inclined tip;

Figure 31 is a sectional view of the rear end of another variant of the lens cartridge provided with a groove in the passage to facilitate folding the deformable intraocular lens in the open position;

32 is a sectional view of the rear end of another variant of the lens cartridge provided with a groove in the passage to facilitate folding the deformable intraocular lens in the closed position;

33A is a sectional view of the front end of the lens cartridge nozzle portion of the modification;

33B is a sectional view of the front end of the lens cartridge nozzle unit according to still another embodiment;

Figure 34 is a detailed side view of the plunger tip of another embodiment in contact with the deformable intraocular lens within the lens injection passage;

35 is a detailed sectional view of the plunger tip shown in FIG. 34;

Figure 36 is a detailed side view of the plunger tip of another embodiment in contact with a deformable intraocular lens within the lens injection passage;

37 is a detailed cross-sectional view of the plunger tip shown in FIG. 36;

Figure 38 is a detailed side view of the plunger tip of another embodiment in contact with a deformable intraocular lens within the lens injection passage;

39 is a detailed sectional view of the plunger tip shown in FIG. 38;

40 is a detailed side view of the plunger tip of another embodiment in contact with the deformable intraocular lens within the lens injection passage;

FIG. 41 is a detailed sectional view of the plunger tip shown in FIG. 40; FIG.

42 is a detailed side view of a plunger tip of the prior art;

43 is a perspective view of a lens injector of the prior art,

44 is a longitudinal sectional view of the lens injector of the prior art shown in FIG. 43;

45 is a side view of a disposable plastic lens cartridge of the prior art;

Fig. 46 is a longitudinal sectional view of the lens cartridge shown in Fig. 45;

It is a first object of the present invention to provide an improved deformable intraocular lens injector (shooter).

It is a second object of the present invention to provide an improved deformable intraocular lens injector comprising a plunger having a plunger tip formed so as not to damage the distal contact of the deformable intraocular lens.

A third object of the present invention includes a plunger having a plunger tip which provides a lateral clearance between the lens cartridge inner wall and the plunger tip to accommodate the distal contact of the deformable intraocular lens, so as not to damage the distal contact of the intraocular lens during insertion. An improved deformable intraocular lens injector is provided.

A fourth object of the present invention is that the outer diameter of the plunger tip is considerably smaller than the inner diameter of the lens cartridge during insertion, so as to provide a lateral clearance between the inner wall of the lens cartridge and the plunger tip to accommodate the distal contact of the deformable intraocular lens. It is to provide an improved deformable intraocular lens injector with a plunger that does not damage the contacts.

A fifth object of the present invention is to provide a lateral groove in the plunger tip to provide a side clearance between the inner wall of the lens cartridge and the plunger tip to accommodate the distal contact of the deformable intraocular lens, thereby avoiding damaging the distal contact of the intraocular lens during insertion. An improved deformable intraocular lens injector with a plunger is provided.

A sixth object of the present invention is to provide a lateral cut in the plunger tip so as to provide a side clearance between the inner wall of the lens cartridge and the plunger tip to accommodate the distal contact of the deformable intraocular lens. An improved deformable intraocular lens injector with a plunger that does not damage is provided.

The present invention provides a side gap between the inner wall of the lens cartridge and the plunger tip that accommodates the distal contact of the deformable intraocular lens, thereby providing an improved deformable with various shaped plunger tips that do not damage the distal contact of the intraocular lens during insertion. Provide an intraocular lens injector.

When the deformable intraocular lens is loaded into the lens cartridge in a contact or non-contact state that may damage the distal contact of the lens, the plunger tip is arranged to make direct contact with the deformable intraocular lens by side clearance.

By the side gap between the inner wall of the lens cartridge through passage and the plunger tip, the distal contact is received in the void space formed by the side gap in such a way that it is not subject to tension or shear stress during insertion. In particular, it is possible to compress the end contacts by twisting, wetting of the end contacts causing shear stress in the end contacts resulting in significant stress and permanent deformation by exceeding the elastic limit of the material used to make the end contacts. The inner wall of the lens cartridge through-path and the plunger tip may be accommodated so as not to catch the end contact. It is also desirable for the end contacts to be sealed or secured to the side gaps to maintain and protect the end contacts in a particular form during insertion. The device includes a device and method for surgical implantation of a deformable intraocular lens.

The method according to the invention comprises lubricating the surface of the deformable intraocular lens with a lubricant suitable for surgery, and loading the deformable intraocular lens in an open lens cartridge. The lens cartridge is closed while compressing the deformable intraocular lens by the folding action into a shape such that the lens can penetrate the passage in the cartridge. The lens cartridge is inserted into the lens injector by withdrawing the plunger.

The plunger slides forward] by pushing the plunger forward with the lens cartridge fixed. By this action, the intraocular lens deformable from the lens holding portion of the lens cartridge to the nozzle portion is transferred. At this point, the thread of the threaded end cap of the plunger engages the thread of the threaded sleeve. The threaded end cap rotates slightly to engage the thread. The device is ready for implantation.

The nozzle portion of the lens cartridge is disposed through a small incision in the eye. The threaded end cap of the plunger rotates and forwards the deformable intraocular lens forward through the nozzle portion to the eye. The threaded end cap is further rotated to expose the tip of the plunger in the eye, pushing the deformable intraocular lens in place. The tip may also be used to rotate the lens in the eye for positioning of the contact.

The device according to the invention comprises a deformable intraocular lens injector having a plunger tip formed to provide a lateral clearance between the plunger tip and the inner wall of the lens injection passage.

The invention can be applied to the plunger tip of each deformable intraocular lens injector (ie, a two-piece device as disclosed herein) to be used with each lens cartridge, or with a guide having a lens injection passage. It can be applied to the plunger tip of a lens injector (one-piece device as disclosed in US Pat. No. 5,275,604 to Rheinish, incorporated herein by reference).

A preferred embodiment of the surgical implant device 10 of a deformable intraocular lens according to the present invention is shown in FIGS. The surgical implant device 10 includes a lens cartridge 12 disposed inside the lens injector 13. The lens injector includes a lens injector body 14 having a side receptacle 15 and a movable plunger 16. 1 shows a side receptacle 15 formed by an opening 17 through a wall of a lens injector body 14 of the size and shape shown in FIGS. 1 and 2. The opening 17 engages with parallel edges 17a and 17a and tapered edges 17b which are sufficiently spaced apart so that the lens cartridge 12 is loaded into the side accommodating portion 15 of the lens injector 13. It is formed by the edges 17c and the stop edge 17d. In Fig. 1, for example, after lens implantation, the lens cartridge 12 is disposed in the side accommodating portion 15 between the engagement edges 17c with the plunger advancing through the position of the lens cartridge 12.

2 shows a lens cartridge 12 separated from the lens injector 13, in which a plunger can be inserted into the lens injector 13 with a lens cartridge 12 having a contact portion of the lens and the lens to be loaded. To be in the withdrawal position. 3 shows a lens injector 13 with the lens cartridge 12 omitted for the purpose of showing the components, with the plunger 16 in the forward position.

One end of the plunger 16 fits into the threaded end cap 18, and the opposite end fits into the tip 20. The threaded end cap 18 is provided with a plurality of grooves 22 to allow a person to hold the cap 18 using a fingertip. The threaded end cap 18 is received in a threaded sleeve 24 of the lens injector body 14. The threaded end cap 18 may be a component detachably attached to the lens injector 13 or may be an integral component, such as the structure shown in FIG.

The plunger 16 is installed in the lens injector 13 in a reciprocating manner in the lens injector. In the illustrated embodiment, the plunger 16 is supported by the guide 26 as shown in FIGS. 5 and 6 for sliding movement within the lens injector 13. The outer diameter of the guide 26 is approximately equal to the inner diameter of the lens injector body 14 so that the guide can be inserted into the lens injector body 14. During construction, the guide 26 is inserted into the lens injector 13 and is fastened in place by pins 28 inserted into the holes formed by the drill on both walls of the lens injector 13 and the guide 26. In a variant, the guide 26 is removed and used to prevent the rotation of the plunger 16 by moving the pin 28 along the flat side of the plunger 16 as shown in FIG.

The cross-sectional shape of the plunger 16 as well as the inner surface shape of the guide 26 are almost semicircular as shown in FIG. This shape prevents the plunger 16 from rotating in the lens injector 13 to maintain the orientation of the tip 20 relative to the lens injector 13 during operation.

The threaded end cap 18 is connected to the plunger 16 in a way that it rotates relative to the plunger 16. For example, the left end (FIG. 5) of the plunger 16 is provided with a threaded extension 30 to be fixed to the threaded end cap 18 by a nut 32. In particular, the threaded end cap 18 may consist of an outer thread 34 and a longitudinal central bore 36 ending in the right end wall 38 of the threaded end cap 18.

The end wall 38 is provided with a hole slightly larger than the outer diameter of the threaded extension 30 such that the threaded end cap 18 freely rotates in the plunger 16 while being secured to the end of the plunger 16. can do. During construction, the nut 32 screwed to the extension 30 is inserted through the central bore 36 to secure the threaded end cap 18 to the plunger 16. The curved end cap 40 is press fit to the end of the central bore 36 and seals the central bore 36 to prevent debris from entering the central bore during use. In a variant, the threaded extension 30 can be replaced by an interference fit connection, thus facilitating assembly by such a connection between the extension to be modified and the threaded end cap 18. do.

Tip shape is shown in detail in FIGS. The plunger 16 is manufactured with an extension 42 supporting the tip 20. The tip 20 structure is provided with means for inserting a deformable intraocular lens in the eye and manipulating the lens in the eye after the insertion step. For example, tip 20 is cut into small sides as shown in the figures. In particular, the left side of the tip 20 shown in FIG. 8 is provided with a flat surface cut face 44, a conical surface 46, and a cylindrical surface 48. The right side of the tip 20 shown in FIG. 9 is provided with a concave surface 50, a conical surface 46, and a cylindrical surface 48.

The end face of tip 20 is designed to push in place as soon as the lens is inserted. For example, the end face is formed by the concave cylindrical surface 52 shown in FIG.

Appropriately deformable intraocular lenses for use in the present invention are shown in Figs. The deformable intraocular lens 54 shown in Figs. 13 and 15 is an attachment means formed by a pair of contacts 58 each composed of one end to be attached to the lens portion 56 and a free end for attachment to eye tissue. It includes a lens body 56 having a. The deformable intraocular lens 60 shown in FIG. 14 includes a lens body 62 and attachment means formed by a pair of lobes 64 on the side of the lens portion 62.

Preferred lens cartridge 12 is shown in detail in FIGS. 16-20. The lens cartridge 12 includes a lens retaining portion 66 and an implant nozzle portion 68 extending to the converting portion 67. When the lens cartridge 12 is in the closed position, a continuous circular or elliptical passage of the same diameter extends through the implant nozzle portion 68, the converter 67, and the lens retainer 66. The lens cartridge 12 is preferably made of injection molded plastic such as polypropylene. The lens holding portion 66 is formed by the fixing portion 70 and the movable portion 72. The fixed portion 70 is fixed relative to the implant nozzle portion 68 and is formed by the tubular portion 74 and the extension portion 76. The movable portion 72 is relatively movable to the fixing portion 70 to open and close the lens retaining portion. The movable portion 72 is formed by the tubular portion 78 and the extension 80. The hinge 82 is provided between the fixed portion 70 and the movable portion 72. The hinge 82 is formed by reducing the wall thickness of the tubular portions 74, 75 at the hinge 82 as shown in FIGS. 17-19. The hinge 82 extends along the length of the lens retaining portion 66 such that the extension 76 separates or merges to open and close the lens retaining portion 66.

The tubular portion 78 of the movable portion 72 is provided with a sealing edge 84 which is exposed when the lens cartridge 12 is opened, as shown in Fig. 16A, which converts when the lens cartridge 12 is closed. It is sealed with a similar sealing edge 86 (see Fig. 17) of 67.

At the end of the nozzle tip 69 are provided three equally spaced slots 87a, 87b, 87c, formed at different lengths around its circumference, as shown in FIGS. 20A and 20B. The slot 87a disposed on the top of the nozzle tip 69 is the shortest, the slot 87c disposed on the right side of the nozzle tip 69 is the longest, and the slot 87b disposed on the left is the intermediate length. The slots 54a, 87b, 87c rotate the lens 54 when it is present at the nozzle tip 69.

Other embodiments of the lens cartridge 12 according to the present invention are shown in Figs.

The lens cartridge 12 shown in FIG. 30 is provided with an inclined tip 94 to facilitate entry of the tip through the incision of the eye during implantation. The angle of the inclined tip 94 may be set at about 45 ° relative to the passage through the lens cartridge 12.

The embodiment of the lens cartridge 12 shown in Figs. 31 and 32 is provided with a pair of grooves 96 formed inside the passage through the cartridge. The groove receives the edge of the lens to be loaded in the lens cartridge 12 so that the lens can bend better. In particular, the edge of the lens is disposed in the groove 96 to prevent relative sliding movement of the edge and the passage inner surface passing through the lens cartridge 12 when the lens cartridge 12 is folded into the closed position.

Each of the embodiments of the lens cartridge 12 shown in FIGS. 33A and 33B are each provided with slots 87 'which facilitate entry of the tip, which also passes through the incision of the eye, at different positions as shown. And a nozzle portion 68 'that is elliptical in cross section. In a variant, the cross section may be two semicircles connected together at a distance, rather than elliptical.

Various features of the lens cartridge 12 shown in Figs. 16-21 and 30-33 can be variously combined and used to achieve a structure suitable for a particular application. However, all such features are improved based on the basic structure.

The components of the device 10 except for the lens cartridge 12 are preferably made of autoclaveable material such as stainless steel or of disposable hard plastic such as medical ABS.

Modification of the Plunger Tip Structure

Modifications of the plunger tip structure are shown in FIGS. 34 to 41. The plunger tip provides a lateral clearance between the lens insertion path and the plunger tip to accommodate the distal contact.

34 shows the plunger tip 100 in contact with the deformable intraocular lens 54 within the lens injection path P while receiving a distal contact 58b between the inner wall of the lens injection path P and the plunger tip 100. Is shown.

The pull plunger tip 100 includes a distal end 102 of the cylindrical plunger tip and a proximal end 104 of the cylindrical plunger tip, as shown in FIGS. 34 and 35. The distal end 102 of the plunger tip is offset from the proximal end 104 of the plunger tip by a distance D such that the lateral clearance on one side thereof is larger than on the opposite side. The offset direction of the distal end 102 of the plunger distal end with respect to the proximal end 104 of the plunger distal end is a technique in which its position and direction in the lens injection passage P fold the deformation guide lens in the lens injection passage P. And, depending on the technology of disposing, it may be varied to accommodate the distal contact. In addition, the distal contact may be formed to at least partially surround the distal end 102 of the plunger tip. The cross-sectional shape of the distal end and the proximal end of the plunger tip may vary.

36 shows a plunger tip 200 which contacts the intraocular lens 54 deformable in the lens injection path P while receiving a distal contact 58b between the inner wall of the lens injection path P and the plunger tip 200. Is shown.

Plunger tip 200 includes side grooves 202 with ends 204 for receiving end contacts 58b as shown in FIGS. 36 and 37. The position of the outer circumferential side groove 202 of the plunger tip portion 200 is based on the technique of folding and disposing the intraocular lens whose position and direction in the lens injection passage P are deformable in the lens injection passage P. Depending upon which the terminal contact 58b is received.

When viewed from the side of the plunger tip 200, the shape of the side grooves 204 can vary from rectangular to triangular, parallelogram, curved edge, partial circle, and other suitable shapes. In addition, the depth of the side grooves 204 can be increased or decreased. In addition, the cross-sectional shape of the side grooves 204 can be changed from semicircle to rectangular, triangular, C-shaped, parallelogram and other suitable cross-sectional shapes.

38 shows the plunger tip 300 which contacts the intraocular lens 54 deformable within the lens injection path P while receiving the distal contact 58b between the inner wall of the lens injection path P and the plunger tip 300. ) Is shown.

Plunger tip 300 includes a side cut face 302 with an end portion 304 for receiving distal contact 58b as shown in FIGS. 38 and 39. The position of the side sloping surface 302 around the outer circumference of the plunger tip 300 is such that its position and direction in the lens injection passage P fold the intraocular lens 54 which is deformable in the lens injection passage P. Depending on the technique and the technique of placement, it may be varied to accommodate the distal contact 58b.

When viewed from the side of the plunger tip, the shape of the side faceted cut 304 may vary from rectangular to triangular, parallelogram, curved edge, partial circle and other suitable cross-sectional shapes. In addition, the depth of the side face 304 may be increased or decreased. In addition, the cross-sectional shape of the side faced surface 304 can be changed from semicircle to rectangular, triangular, C-shaped, parallelogram and other suitable shapes. The number and type of facets may also vary depending on the requirements for a particular lens implantation application.

408 shows the plunger tip 400 in contact with the deformable intraocular lens 54 within the lens injection path P while receiving a distal contact 58b between the inner wall of the lens injection path P and the plunger tip 400. Is shown.

The plunger tip 400 includes a proximal end 404 of the cylindrical plunger tip as shown in Figs. 40 and 41, and a distal end 402 of the cylindrical plunger tip. The position of the length of the distal end 402 of the cylindrical plunger tip may be varied. Also, the cross-sectional shapes of the distal end and the proximal end of the plunger tip may vary.

34 to 41, the end face of the plunger tip is a flat end circular end face. The shape of the end face may be varied to include one or more concave, convex, shaved, curved surface shapes and periphery shapes, depending upon the application of the particular lens implant.

Transplant Method

Surgical operation begins by coating the lens with a lubricant suitable for surgical use and then loading the lens into the lens cartridge 12. For example, as shown in Fig. 21, the lens 54 with the lens body 56 and the shear contact 58a is loaded into the lens cartridge 12, but the distal contact 58b is shown in the manner shown. It remains at the outer rear end of the lens cartridge 12. In particular, the lens 54 is loaded downward with the lens cartridge 12 opened until it is seated on the inner surfaces of the tubular portions 74 and 78, for example by tweezers or the like. The outer circumferential surface edge of lens 54 is maintained by the edges 88, 90 of respective tubular portions 74, 78. The rear edge of the lens 54 is disposed almost at the rear edge of the lens cartridge 12. Lens 54 is manipulated to place contacts 58a and 58b in the manner shown. In particular, as shown by the arrows, the contact portion 54a is disposed in front and the other contact portion 54b is disposed rearward outside the lens cartridge when viewed in the implantation direction.

As a result, the lens holding portion 66 is closed around the lens 54 by applying a force to the extensions 76 and 80 using the fingertips of the lens cartridge 12. The inner surfaces of the tubular portions 74 and 78 bend and fold the lens 54 when the extensions 76 and 80 are forced together as shown in FIGS. 22 and 23. Due to the elastic nature of the deformable intraocular lens 54, the lens 54 is fitted to the curved inner surface of the tubular portions 74 and 78 without being damaged as shown in FIG.

The lens cartridge 12 in which the lens 54 is electrostatic is inserted into the lens cartridge receiving portion 15 of the lens injector 13 between the edges 17a and 17a of the opening 17. As the lens cartridge 12 moves forward, the extensions 76, 80 move past the tapered edges 17b, 17b, so that the front of the extensions 76, 80 contact the stop edge 17d. When it reaches the stop position between the coupling edges 17c and 17c. The engagement edges 17c prevent the rotation of the lens cartridge 12 inside the lens injector 13.

The user moves the plunger 16 forward within the lens injector 13 by pushing the screw-in end cap 18 forward while preventing the lens injector body 14 from moving. As the plunger 16 moves forward, the tip portion 20 is inserted into the rear portion of the lens cartridge 12 and the distal contact portion 58B until the tip portion contacts the loading lens 54 as shown in FIG. Do not meet with. As the plunger 16 moves forward in this manner, the previously lubricated lens 54 is sent to the implant nozzle portion 68 of the lens cartridge 12 as shown in FIG.

As soon as the deformable intraocular lens 54 enters the implant nozzle portion 68, the threads of the end cap 18 contact the threads of the sleeve 24 to prevent further movement of the plunger 16 forward. The end cap 18 is slightly rotated to engage the threads of the sleeve 24 and the threads of the end cap 18. At this point, the surgical implant device is in the stage of implant preparation. The nozzle tip 69 of the nozzle portion 68 is inserted along the incision of the eye, and the end cap 18 is provided with a lens injector body (not shown) to release the lens from the nozzle tip 69 into the eye as shown in FIG. As the end cap 18 continues to rotate relative to 14, the plunger 16 continues to move forward. Screw advancement in this manner to move the plunger 16 forward allows the lens 54 to be accurately pushed into the eye through the tip 68 during implantation surgery. The lens deformed at the nozzle portion 16 returns to the full size of the lens original shape and the focal length is fixed.

After the lens is inserted into the eye, the end cap 18 is further rotated to fully expose the tip 20 of the plunger 16 as shown in FIGS. 28 and 29, pushing the lens forward and It is manipulated from the side to rotate and pushed down to the proper position of the lens in the eye without the aid of other surgical instruments.

The shape of tip 20 is important during implantation surgery. The distal end portion 20 in the form of a cut face provides a gap between the distal end portion 20 and the inner surface of the passage passing through the lens cartridge 12, so that the lens in the lens cartridge 12 as shown in Figs. The distal contact 58b is received during movement. In particular, there is a sufficient gap between the cut surface 44 of the flat surface and the inner wall of the passageway through the lens cartridge 12. During the implantation operation, the distal contact 58b floats in the space between the extension 42 of the tip 20 and the inner wall of the passage, as shown in FIG. This prevents damage to the distal contact, for example, by catching the distal contact between the distal end 20 and the lens 54 during implantation surgery. Shear contact 58a moves through the passageway without being disturbed during the implantation operation and is not damaged.

Claims (11)

A surgical implant device having a lens insertion path for inserting a deformable intraocular lens into the eye through a relatively small incision in eye tissue: And a lens injector having a plunger having a plunger tip formed therein, wherein the shape of the plunger tip provides a lateral clearance between the plunger tip and the inner wall of the lens insertion passage to accommodate the distal contact of the intraocular lens that is deformable without damage during insertion of the lens. Surgical implant device, characterized in that. 10. The surgical device of claim 1, wherein the plunger tip has an outer diameter that is generally smaller than the inner diameter of the lens insertion passage to provide sufficient void space due to the lateral clearance to accommodate the distal contact of the deformable intraocular lens. Implant device. 2. The surgical implant device of claim 1, wherein an outer diameter of the distal end of the plunger tip is smaller than an outer diameter of the base end of the plunger tip. 4. The surgical implant device of claim 3 wherein the distal end of the plunger tip is a cylindrical portion. 5. The surgical implant device of claim 4, wherein the base end of the plunger tip is a cylindrical portion. 6. The surgical implant device of claim 5, wherein the distal end of the plunger distal end is offset from the base end of the plunger distal end. The surgical implant device of claim 1, wherein the plunger tip has a side groove formed to receive a distal contact of the deformable intraocular lens. 8. The surgical implant device of claim 7, wherein the groove is formed a predetermined distance away from an end of the plunger tip. The surgical implant device of claim 1, wherein the plunger tip is provided with a side faceted surface to receive a distal contact of the deformable intraocular lens. The surgical implant device of claim 1, comprising a lens cartridge for receiving a lens insertion path of the surgical implant device of the deformable intraocular lens. A method for inserting a deformable intraocular lens using a surgical implant device, the method comprising: