JP5475087B1 - Intraocular implant, intraocular implant set, intraocular lens - Google Patents

Abstract

To provide an intraocular implant, an intraocular implant set, and an intraocular lens in which replacement of an intraocular lens is easier than before.
A support device is a part for placing an intraocular lens (lens) in the eye (the posterior chamber), and is formed separately from the lens. By attaching the lens 4 to the support 1, a configuration similar to that of a conventional intraocular lens having a lens that substitutes for a crystalline lens extracted by cataract and the like and a portion that supports the lens in the eye is obtained. . The support 1 and the lens 4 may be integrated in the eye. An unprecedented embodiment in which only the lens 4 is replaced while the support 1 is fixed in the eye can be realized.
[Selection] Figure 1

Description

  The present invention relates to an intraocular implant, an intraocular implant set, and an intraocular lens.

  As is well known, as a treatment for cataract of the eye, an operation in which an intraocular lens (aphakic intraocular lens) is transplanted into the eye after the patient's clouded lens is removed is widely performed. For example, Patent Document 1 below proposes an intraocular lens that is transplanted into the eye after the lens is removed and sutured to the ciliary body in the treatment of cataract.

Japanese Patent No. 2792588

  After intraocular lens implantation surgery, patients may complain that the lens power is not appropriate. In that case, there is a case of wearing glasses or the like, but replacement of an intraocular lens is also an option. However, it is said that the replacement operation of the intraocular lens is generally more difficult than the first transplant operation, and it is important to develop a technique that makes the replacement operation easier.

  Therefore, in view of the above, the problem to be solved by the present invention is to provide an intraocular implant, an intraocular implant set, and an intraocular lens in which replacement of an intraocular lens is easier than before.

In order to solve the above-described problems, an intraocular implant according to the present invention includes a platform portion on which a disc-shaped lens acting as a lens function of a crystalline lens of an eye is detachably mounted, and the platform portion to the eye side. Formed in a leg shape having a first portion that extends toward the ciliary groove and a second portion that branches from the side surface of the first portion and extends toward the ciliary body. Supporting the platform part in the posterior chamber of the eye, and converting the expansion and contraction of the ciliary body into the back-and-forth movement of the platform part in the eye, the platform part comprising the lens A through-hole part for allowing light passing through the platform part, and a mounting part for attaching the lens to the platform part in a positional relationship such that the lens and the through-hole part overlap in the visual axis direction And Characterized in that it obtain. Thereby, an embodiment can be realized in which the intraocular implant of the present invention is implanted in the eye, and then only the lens attached to the implant is replaced. Therefore, the intraocular lens can be replaced more easily than in the past.

  Further, the mounting unit may mount the lens so that the platform unit is detachable from the platform front side in the state where the platform unit is supported by the posterior chamber of the eye. Thereby, since the lens can be replaced from the front side in the eye with the intraocular implant implanted in the eye, the intraocular lens can be replaced more easily.

  The platform portion may include a hollow portion that is formed inside the platform portion and that contains a medicine, and a connection hole portion that connects the hollow portion and the outside of the platform portion. Thereby, the intraocular implant of this invention can also provide the function for administration of the chemical | medical agent to an eye. It is particularly suitable when a drug is to be gradually administered over a relatively long period of time.

  The support portion supports the platform portion in the eye in a state where the tip of the support portion is in contact with the ciliary body, and the back-and-forth movement of the platform portion in the eye is performed by the expansion and contraction of the ciliary body. It may be formed in a leg shape to be converted into As a result, the intraocular implant of the present invention may be able to adjust the distance to the in-focus target by moving the lens back and forth by the action of focusing on the patient. This opens up the possibility of realizing an intraocular lens that also has a focus adjustment function.

  An intraocular implant set according to the present invention is any one of the above intraocular implants, and the first intraocular implant in which the support portion abuts against the ciliary groove and supports the platform in the eye. Any one of the above-mentioned intraocular implants, comprising: a second intraocular implant in which the support part is fixed to the ciliary flat part and supports the platform in the eye. . As a result, by arranging two intraocular lenses in the eye, an eye correction function, a focusing function, and the like can be improved, and an intraocular lens that can be easily replaced can be realized.

  The intraocular lens according to the present invention comprises a disc-shaped lens that performs the lens function of the crystalline lens of the eye, and an intraocular implant that is implanted in the eye and supports the lens in the eye. The intraocular implant includes a platform part to which the lens is detachably mounted, and a support part that supports the platform part in the posterior chamber of the eye, and the platform part is light that passes through the lens. Includes a through-hole portion for passing through the platform portion, and a mounting portion for mounting the lens on the platform portion in a positional relationship such that the lens and the through-hole portion overlap in the visual axis direction. It is characterized by that. Thereby, an embodiment can be realized in which the intraocular implant of the present invention is implanted in the eye, and then only the lens attached to the implant is replaced. Therefore, the intraocular lens can be replaced more easily than in the past.

The figure which shows one Embodiment of the intraocular implant and intraocular lens of this invention. AA sectional drawing of FIG. The figure which shows the example of the state which mounted | wore the intraocular implant and the intraocular lens of FIG. The figure which shows the example of the mode of a motion of the intraocular lens by the effect | action of an intraocular tissue. The figure which shows the example of the front-end | tip of a support part. The figure which shows the example of a mode that the front-end | tip of FIG. 5 was arrange | positioned in the eye. The figure which shows the 1st example of the shape of a ring. The figure which shows the 2nd example of the shape of a ring. The figure which shows the example of the structure for administration of a chemical | medical agent. The figure which shows the example of the intraocular implant provided with two haptics. The figure which shows the example of the intraocular implant provided with two haptics and a folding | returning part. The figure which shows the example of the intraocular implant provided with four haptics. The figure which shows the example of the intraocular implant provided with four haptics and a folding | returning part. The figure which shows the example of the state which mounted | wore the intraocular implant and intraocular lens of FIGS. 10-13 in the eye. The figure which shows another example of the state which mounted | wore intraocular with the intraocular implant and the intraocular lens of FIGS. The figure which shows the example of the state which mounted | wore the intraocular implant and intraocular lens of FIG. 1, and the intraocular implant and intraocular lens of FIGS. The figure which shows another example of the state which mounted | wore the intraocular implant and intraocular lens of FIG. 1, and the intraocular implant and intraocular lens of FIGS. The figure which shows the 3rd example of the shape of a ring. BB sectional drawing of FIG. The figure which shows the example of a lens. The figure which shows the example which mounted | wore the ring of FIG. 18 and the lens of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. First, FIGS. 1 to 3 show an intraocular lens support 1 (support, intraocular implant) in one embodiment of the present invention. FIG. 1 is a perspective view of the support 1, and FIG. In the following description, directions related to directions such as front, back, side, and front are based on directions (front, back, side, front, etc.) of the patient's face (or eyes) with the intraocular lens fixed in the eye. And

  The support 1 is a part for placing the intraocular lens 4 (lens) in the eye (the posterior chamber), and is formed separately from the lens 4. By attaching the lens 4 to the support 1, the same lens as a conventional intraocular lens having a lens acting as a lens function of a crystalline lens extracted by cataract and the like, and a portion that supports the lens in the eye. It becomes composition. The support 1 and the lens 4 of the present invention may be integrated in the eye as will be described later. Furthermore, according to the present invention, an unprecedented embodiment in which only the lens 4 is replaced while the support 1 is fixed in the eye can be realized.

  The support 1 includes an annular member 2 (ring) and legs 3. The ring 2 is a member that becomes a so-called platform for mounting the intraocular lens, and has an annular shape having a hole 20 at the center. The lens 4 is fixed (mounted) in the hole 20 (details will be described later).

  The leg portion 3 has four leg shapes extending from the side edge of the ring 2 to the side of the eye. The four legs 3 are formed at positions that are left-right symmetric and vertically symmetric as viewed from the direction facing the eye. Each leg portion 3 has two bent portions 30 and 31. A base portion 32 of the leg portion 3 that is closer to the root side than the bent portion 30 is formed from the side edge of the ring 2 toward the oblique rear side.

  An intermediate portion 33 between the bent portion 30 and the bent portion 31 is formed from the bent portion 30 toward the diagonally forward direction. The distal end portion 34 on the distal end side with respect to the bent portion 31 is formed in a (substantially) orthogonal direction to the visual axis of the eye. The tip of the leg 3 is brought into contact with the ciliary groove. As will be described later, such a bent shape is a shape suitable for transmitting the movement of the intraocular tissue to the movement of the lens 4 in the front-rear direction.

  Further, the leg portion 4 is bifurcated at a position between the bent portion 30 and the bent portion 31. The auxiliary leg portion 3 ′ on one side of the branch is extended obliquely backward from the branched position. The tip of the secondary leg 3 'is in contact with the ciliary heel. The leg portion 3 and the auxiliary leg portion 3 ′ may be formed integrally with the ring 2 using, for example, a resin material. Alternatively, they may be formed separately from the ring 2 and joined (adhered or the like) later.

  The lens 4 has a structure in which a support portion (for example, a haptic) in a conventional intraocular lens is omitted. In the case of a convex lens, the lens 4 basically has a disc shape, and the surface and the back surface of the lens 4 bulge into a convex shape, or the shape that becomes thicker as it approaches the virtual central axis. In the case of a concave lens, the shape is basically a disc shape, and the surface and the back surface of the lens may be concave, or the shape may be thinner as the virtual center axis is closer.

  FIG. 3 shows a cross-sectional view of the eye in a state where the support 1 to which the lens 4 is attached is implanted (attached) in the eye. The lens 4 and the support 1 are implanted in the posterior chamber of the eye (behind the iris 101).

  An example of a transplant procedure is as follows. For example, the practitioner incises a part of the cornea 100 in a state after removing all the lenses by cataract, and then inserts the support 1 and the lens 4 into the posterior chamber. At that time, for example, using the elasticity (flexibility) of the support 1 and the lens 4, the support 1 and the lens 4 are rolled and inserted into the cartridge, and the tip of the cartridge is made to reach the posterior chamber through the cornea 100, What is necessary is just to discharge | emit the support tool 1 and the lens 4 there.

  When the support tool 1 is fixed to the posterior chamber, the tip of the leg 3 is inserted into the ciliary groove 103, and the tip of the auxiliary leg 3 'is brought into contact with the ciliary heel part 102 and fixed. Note that the tip of the leg portion 4 does not necessarily need to be in the innermost part of the ciliary groove 103, but may be in contact with at least a part of the ciliary groove 103. The length (size) of the leg 3 may be designed such that the leg 3 is slightly bent in a state where the tip of the leg 3 is inserted into the ciliary groove 103. When the sub-leg portion 3 ′ is in contact with the ciliary heel portion 102, the tip of the sub-leg portion 3 ′ may be pushed into the surface of the ciliary heel portion 102.

  It suffices that no part of the support 1 is sutured in the eye. By the above fixing method, the support 1 is reliably fixed to the posterior chamber. The practitioner may fix the lens 4 to the support 1 within the eye. Alternatively, the lens 4 may be fixed to the support 1 before the support 1 is fixed in the eye. If the lens 4 is fixed to the support 1, the lens 4 is also securely fixed in the eye.

  In the present invention, after the lens 4 and the support 1 are mounted in the eye as described above, only the lens 4 can be replaced while the support 1 is mounted as it is. In that case, for example, the cornea is incised as described above, and a new lens is inserted therefrom using, for example, a cartridge device similar to that described above, and the lens 4 mounted at that time is removed from the support 1 and a new lens is obtained. 4 is attached to the support 1.

  The support 1 of the present invention has a function that allows the position of the lens 4 to be moved back and forth by an action (reflection action) for focusing the eye by the patient. The function will be described with reference to FIG.

  According to medical knowledge, when a human tries to focus the eye, a force acts in the direction indicated by the arrows 200 and 200 'in FIG. 4 (the ciliary body expands). This force causes the support 1 to be distorted as shown in FIG. 4 by applying the force indicated by the arrow 200 ″ to the leg 3 of the support 1 as shown in FIG. 4. That is, the bent portion 31 is pressed toward the lens 2. Thus, the base portion 32 of the leg portion 3 changes to a posture closer to the orthogonal to the ring 2.

  Thereby, the attitude | position of the root part 32 changes to the direction of the arrow 201, and the ring 2 and the lens 4 are extruded ahead in the eye. When the force of the arrow 201 is lost (when the ciliary body contracts), the ring 2 and the lens 4 return to their original positions. When the lens 4 moves back and forth in this way, the distance to the visual object on which a clear image is formed on the retina by the lens 4 also changes. Thereby, the patient wearing the support tool 1 and the intraocular lens 4 can see not only the object at a single distance from himself / herself but also an object within a certain distance range.

  In the present invention, a device may be added to the tip shapes of the leg portion 3 and the auxiliary leg portion 3 '. Specifically, as shown in FIG. 5, recesses 36 and 36 'may be formed at the tips of the leg 3 and the auxiliary leg 3'. As a result, as shown in FIG. 6, the tips 35 and 35 ′ of the leg portion 3 and the auxiliary leg portion 3 ′ enter the ciliary groove 103 and the ciliary body (hip portion) 102, respectively, The structure of the groove 103 enters, and the structure of the ciliary body part 102 enters the inside of the recess 36 '. Therefore, the formation of the recesses 36 and 36 ′ is suitable for more secure fixation of the support 1 in the eye.

  In particular, according to the knowledge obtained by the inventor, the ciliary body 102 is enlarged after the lens is extracted, and the ciliary groove 103 tends to become narrower. Due to such deformation, the intraocular tissue enters the recesses 36, 36 'more strongly, so that the effect of fixing the position of the support 1 is further enhanced. The positions where the recesses 36 are formed are on the opposite side to the iris (the side facing the ciliary body) in the leg 3 at the time of intraocular fixation, and can contact the enlarged (deformed) ciliary groove. A position close to the tip may be used. It should be noted that the present invention is not limited to the formation of the single recess 36, 36 ', and an uneven shape (for example, a plurality of recesses and protrusions) into which the intraocular tissue enters (or fits with the uneven shape of the intraocular tissue) is formed. Also good.

  Next, details of the shape of the ring 2 will be described. Two examples of the shape of the ring 2 are shown in FIGS. As shown in FIG. 2, the ring 2 has an annular shape having a through-hole portion 20 at the center. The through-hole portion 20 is formed so that the light passing through the lens 4 (light passing between the cornea, the lens, and the retina) is not blocked by the presence of the ring 2, and an annular portion around the through-hole portion 20 To support.

  In the example of FIG. 7, the annular portion around the ring 2 supports the side edge portion of the lens 4 so as to wrap. Specifically, as shown in FIG. 7, the annular portion around the ring 2 has a substantially U-shaped cross section, and has a rear portion 21, a front portion 22, and side portions 23. The rear part 21 covers the side edge of the ring 2 from the rear. The front part 22 covers the side edge of the ring 2 from the front. The side edge of the side portion 23 ring 2 is covered from the side (radially outward).

  The ring 2 in FIG. 7 may be formed of an elastic material such as rubber or resin. When the lens 2 is mounted, the front portion 22 is slightly bent (elastically deformed) and the lens 2 is pushed in from the front. For this reason, in the example of FIG. 7, the radial width of the front portion 22 is made shorter than the radial width of the rear portion 21 to facilitate the operation of pushing the lens 2 from the front. The front portion 22 may be formed continuously over the entire circumference, or may be formed intermittently (a plurality) at intervals in the circumferential direction.

  In the example of FIG. 8, it is set as the form which does not form the front part 22 compared with FIG. The side portion 24 is also substantially linear. In this form, the lens 4 is brought into sliding contact with the inner wall of the side portion 24 and press-fitted into the ring 2. Of course, the size of the ring 2 and the lens 4 may be designed so that this press-fitting can be performed with a relatively small force in ophthalmic surgery. The lens 4 is fixed in the ring 2 by friction between the side edge of the lens 4 and the inner wall of the side portion 24.

  In the present invention, the ring 2 may have a function of administering (supplying) a drug to the eye. An example of the structure for this purpose is shown in FIG. In this example, a cavity 25 is formed in the ring 2 in the circumferential direction, and a connecting hole 26 that connects the cavity 25 and the outside of the ring 4 is formed. The cavity 25 may be formed over the entire circumference. A plurality of connecting holes 26 may be formed at intervals in the circumferential direction, or only one may be formed.

  The cavity 25 is formed to accommodate a medicine. The drug may be injected into the cavity 25 from the connecting hole 26 with, for example, an injection needle having a tip inserted into the eye in a state where the support is implanted in the eye. Thereby, since the medicine accommodated in the cavity portion 25 gradually penetrates into the eye through the connecting hole portion 26, it is suitable when it is desired to gradually administer the medicine into the eye over a long period of time. The connecting hole portion 26 may be formed at a position in front of the eye with respect to the lens 2 in a state where the lens 4 is mounted in the ring 2. Thus, the medicine can be easily injected from the connecting hole portion 26 into the cavity portion 25 with an injection needle or the like while the ring 2 and the lens 4 are mounted in the eye. A member such as a sponge that is infiltrated and held by the medicine may be disposed inside the cavity portion 25.

  In the support of the present invention, the shape of the leg is not limited to the shape of FIG. Another example of the shape of the leg is shown in FIGS. The example of FIG. 10 is a case where the leg portion has a so-called haptic shape (haptic shape). That is, a pair of haptics 5 is extended in a circular arc shape (loop shape) from two locations on the side edge of the ring 2 (a position symmetrical with respect to the central axis). The haptic 5 may be formed (molded) integrally with the ring 2 or may be formed separately from the ring 2 and joined (adhered later).

  In the example of FIG. 11, a folded portion 50 that is folded and extends in the reverse direction is formed on the tip side of the haptic 5. The shape of the folded portion in the folded portion 50 may be folded so as to have a corner, or may be folded in a curved shape without the corner.

  The example of FIG. 12 is an example in which four haptics 5 similar to those in FIG. 10 are formed. The haptics 5 may be formed at equal intervals in the circumferential direction. The example of FIG. 13 is an example in which folded portions 50 similar to those of FIG. 11 are formed at the tips of the four haptics 5 of FIG.

  In these examples, the haptic 5 has elasticity. For example, in a natural state (that is, a state in which no force is applied from the other), the folded portion 50 and the other portions are separated from each other as shown in FIGS. It may be. In this case, when the folded portion 50 is folded (that is, the folded portion 50 is aligned with the other haptics 5 in a straight line), the folded portion 50 and the other portions are separated from each other as shown in FIGS. It is assumed that the elastic restoring force works so as to return to. Alternatively, the bent portion at the tip of the haptic 5 does not have sufficient elasticity as described above, and the shapes of FIGS. 11 and 13 may always be maintained.

  As described above, the folding at the folding portion 50 may be a folding with a corner or a curved folding without a corner. However, the angle of the folded portion should not be opened too much, and the inside of the intrascleral tunnel will be described later. The folded portion 50 and the other haptic 5 may be at an angle at which the folded portion can be inserted at the head.

  For example, a scale line may be displayed on the folded portion 50 by printing, for example, at intervals in the length direction. There may be a plurality of scale lines, and the intervals between the scale lines may be equal intervals such as 0.5 mm. There may be one graduation line.

  Since the support portion of the intraocular lens 1 is formed of the same material as that of the conventional intraocular lens, if the practitioner folds an arbitrary portion of the folding portion 50 using an appropriate medical instrument, the support portion can be folded relatively easily. Separate at the designated location. Therefore, the practitioner can easily adjust the length of the folded portion 50 by folding the folded portion 50 at an appropriate length using the scale line as a guide. Therefore, the length of the folded portion 50 can be set to an appropriate length according to the length of the intrascleral tunnel described later.

  An example in which the support of FIGS. 10 to 13 is implanted in the eye together with the lens 4 is shown in FIG. The support tool 1b (1c, 1d, 1e) is a so-called intrascleral fixation technique (sewing) in the posterior chamber of the eye (or posterior chamber) after all or part of the lens that has become clouded due to cataracts is removed. Fixed without). As shown in FIG. 14, in the state where the ring 2 (and the lens 4 attached to the ring) is arranged at the back of the iris, the tips of two or four haptics 5 extended from the ring 2 (supporting tool) In the case of 1c and 1e, the folded portion 50 is included) and is embedded in the sclera through the ciliary flat portion. In the example of FIG. 14, the entire lens is extracted.

  An example of the procedure for intrascleral fixation is as follows. After conjunctivectomy, etc., at a position adjacent to the limbus of the cornea in the sclera (for example, two (or four) positions symmetrical with respect to the visual axis at the position adjacent to the edge of the sclera surface) It forms a scleral half-layer valve that is approximately half the thickness of the sclera. Then, a scleral incision is formed from one place below the scleral half-layer valve in the sclera, for example, toward the center of the eyeball (for example, toward the ciliary flat portion). Furthermore, in the side wall of the portion where the scleral half-layer valve is cut out, the entrance is a point at a depth half the thickness of the sclera from the sclera surface, for example, in a direction substantially parallel to the edge, that is, the visual axis. The intrascleral tunnel is formed in the circumferential direction. The intrascleral tunnel may be formed with an appropriate length (for example, 2 mm to 3 mm) so as to penetrate the sclera surface as an outlet.

  Then, the support tool 1b (or 1c, 1d, 1e) is inserted into the eye by a predetermined injector or the like in a state of being rounded into a rod shape from, for example, an incision formed in the cornea. With the scleral half-layer valve opened, the tip of the haptic 5 inserted into the eye (including the folded portion 50 in the case of the support device 1c) is passed through the scleral incision with a suitable instrument. It is pulled out from the flat part and exposed to the outside from the lower part of the scleral half-layer valve. At that time, the entire folded portion 50 is exposed outside the eye.

  Then, the bent portion of the folded portion 50 exposed to the outside of the eye is pulled out from the exit side of the scleral surface of the intrascleral tunnel formed above, and the tip of the haptic 5 (in the case of the support tool 1c, the folded portion 50). Is inserted into the intrascleral tunnel.

  In order to enable this insertion, the folding angle in the folded portion 50 may be an angle that allows insertion into the intrascleral tunnel together with a part of the haptic 5 other than the folded portion. In the case of the support 1c, the length of the folded portion 50 may be a length that is accommodated entirely in a tunnel-like hole formed inside the sclera together with a part of the haptic 5 other than the folded portion. . The length of the folded portion 50 may be set to an appropriate length in advance by the practitioner. When the above procedure is completed, the two (four) scleral half-layer valves are closed. At that time, for example, a fibrin glue is attached to the scleral half-layer valve (on the back side thereof) or the opposite surface. Is applied to adhere the scleral half-layer valve to the sclera. The above is an example of the main procedure of intraocular lens intrascleral fixation.

  The intrascleral fixation of the support tools 1b, 1c, 1d, and 1e may be a technique that does not form a scleral half-layer valve. In that technique, a scleral half-layer valve is not formed, and a scleral incision is made from the surface of the sclera toward the posterior chamber. In the scleral incision, an intrascleral tunnel with an appropriate length (for example, 2 to 3 mm) is formed in a direction approximately parallel to the edge from the half-thickness of the sclera, that is, in the circumferential direction with respect to the visual axis. The scleral surface is formed so as to penetrate as an outlet.

  Then, the haptic 5 is inserted into the intrascleral tunnel in the same manner as described above (including the folded portion 50 in the case of the support tools 1c and 1e). In this case, the scleral incision after insertion of the scleral tunnel at the tip may be sewn if necessary. The intrascleral fixation technique of the support is not limited to the above two techniques, and any intrascleral fixation technique may be used.

  With the above procedure, the support 5 is inserted into the intrascleral tunnel. As a result, the sclera having sufficient strength tightens and restrains the tip of the haptic 5. Accordingly, even when a force in the direction of pulling out the haptic 5 is applied, separation from the sclera is reliably suppressed. In particular, in the case of the support 1c, even if a force in the direction of pulling out the haptic 5 is applied, the tip of the folded portion 50 is locked somewhere in the sclera, so that the haptic 5 can be more reliably detached from the sclera. Is suppressed.

  Further, when the bent portion of the folded portion 50 has sufficient elasticity, the folded portion 50 accommodated inside the intrascleral tunnel tries to open again by its own elastic restoring force, and the inner wall of the intrascleral tunnel is Since the haptic 5 is pushed, the haptic 5 is more strongly restrained in the sclera, so that the haptic 5 is strongly prevented from detaching from the sclera. In the example of FIG. 14, the haptic 5 is pulled out of the ciliary body flat portion and fixed by the sclera, but fixing of the intraocular lens (support) through the ciliary flat portion has been conventionally performed. This is a new and preferable method.

  Alternatively, the supports 1b, 1c, 1d, and 1e shown in FIGS. 10 to 13 may be fixed outside the sclera as shown in FIG. In this case, the intrascleral tunnel is not formed by the above-described procedure, and the haptic 5 (including the folded portion 50 in the case of the support tools 1c and 1e) is pulled out of the sclera through the ciliary flat portion. In the case of the support tools 1c and 1e, when a force in the direction of pulling out the haptic 5 is applied, the folded portion 50 is locked to the sclera surface and the haptic 5 is prevented from being detached. In the case of the support tools 1b and 1d, the support tools 1b and 1d may be fixed by sewing a haptic drawn out of the sclera to the sclera.

  In the fixing of the support tool as described above, if the number of haptics 5 is smaller as in the support tools 1b and 1c, the transplantation operation becomes easier, and the number of haptics 5 is larger as in the support tools 1d and 1e. Then, the position fixing of the ring in the eye is further stabilized. In particular, when fixing through the ciliary flat part, providing four haptics is suitable for stabilizing the intraocular position of the ring.

  In the present invention, a plurality of the above-mentioned supports may be implanted in the eye. FIG. 16 shows an example in which the support 1a of FIG. 1 and the support 1b (1c, 1d, 1e) of FIGS. 10 to 13 are implanted in the eye. In this example, on the front side of the eye, the support 1a is in a state in which the tip of the leg 3 is brought into contact with the back of the ciliary groove and the tip of the auxiliary leg 3 'is brought into contact with the ciliary buttocks. And it is supported in the eye. Further, on the rear side of the eye, the support 1b (or 1c, 1d, 1e) is supported in the eye by fixing the tip of the haptic through the ciliary flat portion in the sclera. As shown in FIG. 17, the support 1b (or 1c, 1d, 1e) may be the above-described episcleral fixation.

  In the examples of FIGS. 16 and 17, two lenses are arranged in the eye by attaching the lens to each support tool. Therefore, the effect of correcting visual acuity is improved by the two lenses. Further, also in the configurations of FIGS. 16 and 17, the support 1a on the front side moves back and forth by the action of force on the ciliary body or the like according to the principle described above. Accordingly, the distance to the subject on which the patient can focus the eye can be adjusted to be relatively large by the back-and-forth movement of one (front) lens in the two-lens set.

  In the present invention, the form in which the lens 4 is attached to the support 1a (1b, 1c, 1d, 1e) is not limited to the above description. 18 to 21 show another example of a structure for mounting the lens 4. In this example, the lens 4 is mounted on the ring 2 by forming a hole in the lens 4 and forming a protrusion on the ring 2 and fitting them together. In the example of FIGS. 18, 19, and 21, the protrusions 29 are formed at two locations that are symmetrical with respect to the central axis of the ring 2.

  The ring 2 may be any of the above-described supports (or any support in the present invention). Correspondingly, also in the example of FIG. 20, the hole portions 40 are formed at two symmetrical positions with respect to the central axis of the lens 2. By fitting these as shown in FIG. 21, the lens 4 is attached to the ring 2. The protrusion 29 is formed so as to protrude to the front side of the eye at the time of intraocular implantation in the ring 2. Thereby, it is possible to replace only the lens 2 while the support is implanted in the eye.

  The above embodiments may be arbitrarily modified and modified based on the gist described in the claims. For example, although the number of the leg portions 3 in FIG. 1 is four, this is not limited to four, and may be an even number such as six or eight. In addition, the number of haptics is 2 or 4 in the above, but this may be any number such as 3, 5 or 6. The shape of the support portion that supports the lens portion is not limited to the above-described haptic shape or leg shape, and may be any shape that can fix the lens portion 2 in the eye by a shape extending in the radial direction or the circumferential direction with respect to the visual axis. .

1a, 1b, 1c, 1d, 1e Support device (intraocular implant)
2 Ring (platform part)
3 legs (supporting part)
4 Lens 5 Haptic (support)
22 Front part (mounting part)
23 Side (mounting part)
24 Side (mounting part)
29 Projection (mounting part)

Claims (5)

A platform part on which a disk-shaped lens acting as a lens function of the crystalline lens of the eye is detachably mounted;
A first portion extending from the platform portion to the side of the eye and contacting the ciliary groove; and a second portion extending from the side surface of the first portion and extending toward the ciliary body. A support portion that is formed in a leg shape and that supports the platform portion in the posterior chamber of the eye, and converts expansion and contraction of the ciliary body into a back-and-forth movement in the eye of the platform portion ;
The platform portion includes
A through-hole portion for allowing light passing through the lens to pass through the platform portion;
A mounting portion for mounting the lens on the platform portion in a positional relationship such that the lens and the through-hole portion overlap in the visual axis direction;
An intraocular implant comprising:   2. The intraocular device according to claim 1, wherein the mounting unit mounts the lens so that the platform unit can be attached to and detached from the platform unit from the front side of the eye in a state where the platform unit is supported by the posterior chamber of the eye. Transplant. The platform portion is
A cavity formed inside the platform portion for containing the drug;
A connecting hole for connecting the cavity and the outside of the platform,
The intraocular implant of Claim 1 or 2 provided with these. An intraocular implant according to any one of claims 1 to 3, first in the eye in which the support portion for supporting the platform portion in contact with the ciliary groove and ciliary body in the eye Transplants,
A sub-platform portion on which a disc-shaped lens acting as a lens function of the crystalline lens of the eye is detachably mounted, and the tip is fixed to the ciliary flat portion extending from the side edge of the sub-platform portion. A second intraocular implant comprising: a sub-support portion that supports the subplatform portion in the eye behind the first intraocular implant ;
An intraocular implant set characterized by comprising: A disk-shaped lens acting as the lens function of the lens of the eye;
An intraocular implant implanted in the eye to support the lens in the eye;
The intraocular implant consists of:
A platform on which the lens is detachably mounted;
A first portion extending from the platform portion to the side of the eye and contacting the ciliary groove; and a second portion extending from the side surface of the first portion and extending toward the ciliary body. A support portion that is formed in a leg shape and that supports the platform portion in the posterior chamber of the eye, and converts expansion and contraction of the ciliary body into a back-and-forth movement in the eye of the platform portion ;
The platform portion includes
A through-hole portion for allowing light passing through the lens to pass through the platform portion;
A mounting portion for mounting the lens on the platform portion in a positional relationship such that the lens and the through-hole portion overlap in the visual axis direction;
An intraocular lens comprising:

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