JP6824576B2 - Adjustable intraocular lens - Google Patents

Description

The present invention relates to an accommodative intraocular lens inserted into an anterior capsular incision in ophthalmic surgery such as extracapsular surgery performed as cataract surgery, refractive surgery or presbyopia correction surgery.

Usually, accommodation of the human eye (hereinafter referred to as accommodation) is performed by changing the thickness of the crystalline lens.

As shown in FIG. 15, the crystalline lens L is a convex transparent lens having a diameter of about 9 to 10 mm and a thickness of about 4 to 5 mm, and is wrapped in a transparent crystalline lens capsule S behind the iris I. It is fixed to the ciliary body C via the zonule Z of Zin, and the focus is adjusted mainly by changing the curvature of the front surface of the crystalline lens L according to the movement of the ciliary body C during accommodation.

Explaining the specific mechanism of regulation, for example, when looking at a distance, as shown in FIG. 15 (a), the ciliary muscle Cm of the ciliary body C is relaxed, and the ciliary body C is the capsular bag. It is in a position retracted in the direction away from S. In this state, a relatively strong tension is generated in the zonule Z located between the ciliary body C and the equatorial section Se of the capsular bag. As a result, the equatorial section Se of the capsular bag is pulled outward in the radial direction, and the curvature of the front surface of the crystalline lens L in the capsular bag S is reduced accordingly, so that the focus is adjusted during distance vision.

On the other hand, when adjustment efforts are made to look at nearby objects, as shown in FIG. 15 (b), the ciliary muscle Cm of the ciliary body C contracts and the ciliary body C becomes afferent (capsular capsule equatorial section Se). The ciliary body C is located in the direction close to the capsular bag S. As a result, the tension of the zonule Z is weakened, and the curvature of the front surface is increased due to the elasticity inherent in the crystalline lens L, so that the focus is adjusted during near vision. It is known that during this focus adjustment, the closer to the center of the anterior lens capsule Sf, the better the movement, and the posterior lens capsule Sb hardly moves.

In this way, in response to the contraction and relaxation of the ciliary muscle Cm of the ciliary body C, the curvature of the front surface of the crystalline lens L is mainly changed, and the focus is adjusted by refracting the light entering the eye. .. In this accommodation mechanism, it is known that the contraction function and relaxation function of the ciliary body C by the ciliary muscle Cm are relatively well maintained even in old age, but on the other hand, the crystalline lens L The cortex and nucleus, which are the contents of the lens, harden and lose flexibility as they get older, and the curvature of the front surface of the crystalline lens L becomes difficult to change. Therefore, the ability to adjust the focus at will from distance vision to near vision. Is known to be lost (this is called presbyopia).

By the way, among the diseases that occur in the crystalline lens L, there is a disease called cataract that becomes cloudy mainly due to aging, and many patients undergo cataract surgery to treat this cataract. In this operation, a circular hole is usually made in the anterior capsule Sf, and the contents of the opaque lens are removed by phacoemulsification, leaving only the transparent crystalline lens S in the incised state. A method of inserting an intraocular lens into the capsular S of the lens is applied. Cataract surgery by this method is currently performed on more than 1 million patients a year in Japan and more than 3 million patients a year in the United States, and the intraocular lens used here is the adjusted intraocular lens shown in Patent Document 1. Lenses are known.

The accommodative intraocular lens of Patent Document 1 is an accommodative intraocular lens that is inserted into the lens capsule from which the contents have been removed in cataract surgery or the like, and is composed of a lens capsule expansion device and an optically deformable optical portion. To. This capsular expansion device is provided so as to be in contact with the inner surface of the anterior capsule, and has an anterior support portion that allows light to pass to the posterior side and an inner surface of the posterior capsule while facing the anterior support portion on the posterior side of the anterior support portion. A rear support portion that is provided in contact with the front support portion and allows light from the front side to pass to the rear side, and a front support portion and the rear support portion that have an urging force in a direction that separates the front support portion from the rear support portion. A connecting portion for connecting the supporting portion is provided. Then, the anterior support portion presses the inner surface of the anterior capsule and the posterior support portion presses the inner surface of the posterior capsule by the urging force of the connecting portion, and the optical portion presses the connecting portion of the capsular bag expansion device. The movement of the connecting portion when it is directly or indirectly locked to the connecting portion in a manner of being surrounded by the portion and moves in the proximity and separation direction of the front support portion and the rear support portion by the movement of the capsular bag. A force acts directly or indirectly from the connecting portion to change the curvature of the optical portion.

Japanese Patent Application No. 2013-257870

However, although the conventional accommodative intraocular lens exhibits a practical accommodation function, the optical part of the lens is deformed with good optical characteristics by a weak force, and the accommodation function is as advanced and vigorous as that of a young eye. Was difficult to express. For this reason, the accommodation function of the accommodative intraocular lens is more effectively expressed by the minute movement of the capsular bag caused by the weak force of contraction and relaxation of the ciliary muscle, and the accommodation function of the accommodation intraocular lens is enhanced. There was a longing for a technique that would bring the eye closer to its natural state when it was younger.
The present invention has been made in view of the above-mentioned technical background, and an object of the present invention is to provide an accommodative intraocular lens capable of effectively exhibiting an accommodation function.

The present invention is an accommodative intraocular lens that is inserted into the capsular bag from which the contents have been removed in ophthalmic surgery in order to achieve the above object, and is provided in the capsular dilation device and the inside of the capsular dilation device. It is composed of a regulating member and an optical portion provided inside the regulating member and elastically deformed. The capsular expansion device is provided with an anterior support portion provided in contact with the inner surface of the anterior capsule and a posterior support provided in a manner in contact with the inner surface of the posterior capsule while facing the anterior support portion on the posterior side of the anterior support portion. A portion and a connecting portion that connects the front support portion and the rear support portion in a manner having an urging force in a direction that separates the front support portion from the rear support portion. Further, the restricting member is arranged in front of the optical portion and has an opening formed in the center thereof, a rear regulating portion arranged behind the optical portion, the front regulating portion and the above. It is provided with a plurality of regulating member connecting portions for connecting the rear regulating portions. Further, in the optical portion, the central portion is exposed from the opening of the front regulating portion, the peripheral portion is exposed from between the connecting portions for the regulating member adjacent to each other, and the exposed peripheral portion is the expansion of the capsular bag. It is locked to the connecting portion of the device.

According to this, the anterior support presses the inner surface of the anterior capsule and the posterior support presses the inner surface of the posterior capsule due to the urging force of the connecting portion of the capsular expansion device, thereby surrounding the equatorial region of the capsular capsule. At the same time that the equator of the capsular bag expands as the part stretches and expands in the anterior-posterior direction, the equator of the capsular bag moves afferently and the diameter of the equatorial lens sac shrinks. As a result, the zonule of Zinn is pulled in both the direction of the capsular bag and the ciliary body, and the zonule of Zinn is continuously tensioned with an appropriate strength, and as a result, the capsular bag is tensioned appropriately. Therefore, the zonule of Zinn can accurately transmit the slight contraction and relaxation of the ciliary muscle of the ciliary body to the capsular bag.

Further, in near vision, the optical portion exposed from between the connecting portion for the regulating member according to the movement of the connecting portion when the front support portion and the rear support portion move in the separation direction due to the movement of the capsular bag. When the peripheral portion is pressed inward in the radial direction by the connecting portion of the capsular expansion device, the optical portion tries to be deformed so as to bulge in the anteroposterior direction. At this time, since the peripheral portion of the optical portion is restricted from being deformed in the front-rear direction and / or the radial direction by the regulating member, the central portion of the optical portion greatly bulges forward from the opening of the front regulating portion, and the optical portion The curvature of the central part can be effectively increased.

On the other hand, in the case of distance vision, the peripheral portion of the optical portion exposed from between the connecting portion for the regulating member according to the movement of the connecting portion when the front support portion and the rear support portion move in the proximity direction due to the movement of the capsular bag. Is not pressed inward in the radial direction by the connecting portion of the capsular expansion device, so that the optical portion tries to be deformed in a manner of expanding in the radial direction due to its own elastic force. At this time, since the optical portion is restored to its original shape, the central portion of the optical portion is largely retracted rearward to the opening of the front regulating portion, and the curvature of the central portion of the optical portion can be effectively reduced. ..

Further, in the lens capsule expansion device, a bent portion is formed in the connecting portion so as to extend radially outward of the front supporting portion and the rear supporting portion, and in the optical portion, the exposed peripheral edge portion is connected to the connecting portion. It is preferably locked to the bent portion of the portion. According to this, since the peripheral edge portion of the optical portion is pressed inward in the radial direction from the bent portion of the connecting portion, the optical portion can be effectively deformed with good optical characteristics.

Further, it is preferable that the optical portion is formed to have a larger diameter than the front regulating portion and the rear regulating portion of the regulating member. In this case, the optical portion may be exposed so as to project radially outward from between the regulating member connecting portions of the regulating member. Alternatively, the optical portion is provided with a plurality of protrusions protruding radially outward at the peripheral edge portion along the circumferential direction, and each protrusion protrudes radially outward from between the regulating member connecting portions. It may be exposed. According to this, since the area where the peripheral edge portion of the optical portion is exposed from between the connecting portions for the regulating member becomes large, the peripheral portion of the optical portion exposed from between the connecting portions for the regulating member has a diameter due to the connecting portion. It becomes easy to be pressed inward in the direction.

Further, it is preferable that the optical portion is formed of an elastic film having a thickness of 5 to 250 μm and is filled with a fluid substance. According to this, the peripheral portion of the optical portion is less likely to be locally distorted, the peripheral portion is likely to be deformed uniformly as a whole, and the central portion of the optical portion is also easily deformed uniformly.

Further, the optical portion may be formed of an elastic film having a peripheral portion having a thickness of 50 to 250 μm and a central portion having a thickness of 5 to 100 μm. According to this, since the peripheral portion of the optical portion is formed thick and the central portion of the optical portion is formed thin, the central portion of the optical portion is easily deformed, so that the optical portion is effectively deformed with good optical characteristics. be able to.

Further, the optical portion may be formed of an elastic film having a peripheral portion having a thickness of 50 to 250 μm, a front central portion having a thickness of 5 to 100 μm, and a rear central portion having a thickness of 100 to 250 μm. According to this, since the front central portion of the optical portion is thin and the rear central portion is formed thick, the central portion of the optical portion is easily deformed forward and is difficult to be deformed backward. It can be reproduced.

Further, the optical portion may be formed with a bulging portion that bulges inward on the inner surface of the peripheral edge portion. According to this, when the optical portion is deformed, the peripheral portion of the optical portion tends to be constricted in the vicinity of the bulging portion, and the central portion of the optical portion tends to bulge forward from the opening of the front regulating portion. ..

In addition, the front and / or rear central portion of the optical portion may be configured separately from the peripheral portion. According to this, the front and / or the rear central portion can be formed as a thin elastic film, while the other portions can be formed separately as a thick elastic film, so that optical portions having different thicknesses can be easily manufactured. it can.

Further, the optical unit may be provided with a convex lens having a refractive power suitable for the patient's case in the rear central portion. According to this, since the central portion of the optical portion is less likely to be deformed backward due to the convex lens, it is possible to simulate the human eye lens in which the central portion of the optical portion is easily deformed forward and is difficult to be deformed backward during accommodation. it can. Further, by changing the power of the convex lens in the optical unit, the refractive power of the optical unit can be easily changed according to the patient's condition.

Further, in the regulating member, it is preferable that a plurality of second regulating member connecting portions are provided along the circumferential direction between the front regulating portion and the rear regulating portion. According to this, the movement of the front regulating portion and the rear regulating portion in the front-rear direction is restricted by the second regulating member connecting portion. For this reason, during near vision, the peripheral edge of the optical portion exposed from between the connecting portions for the regulating member is pressed radially inward by the connecting portion of the capsular expansion device, so that the fluidity inside the optical portion is fluid. Since the substance surely flows into the central portion from the peripheral portion of the optical portion through the connection between the second regulating member, the central portion of the optical portion uniformly bulges forward from the opening of the front regulating portion. Can be done. On the other hand, when viewed from a distance, the peripheral portion of the optical portion exposed from between the connecting portions for the regulating member is not pressed inward in the radial direction by the connecting portion of the capsular expansion device, so that the fluid substance inside the optical portion is released. Since the central portion of the optical portion flows into the peripheral edge portion through between the connecting portions for the second regulating member, the central portion of the optical portion can be uniformly retracted to the opening of the front regulating portion.

Further, the accommodative intraocular lens regulating member according to the present invention is an accommodative intraocular lens regulating member used for the accommodative intraocular lens, and is arranged in front of the optical portion and has an opening formed in the center. It is characterized by including a front regulating portion, a rear regulating section arranged behind the optical section, and a plurality of regulating member connecting sections for connecting the front regulating section and the rear regulating section.

Further, the regulating member for an adjustable intraocular lens is provided with the optical portion inside, and the central portion of the optical portion is exposed from the opening of the front regulating portion, and the peripheral portion is adjacent to each other. It may be exposed from between the connecting portions.

The present invention also provides an accommodative intraocular lens that is inserted into the capsular bag from which the contents have been removed in an ophthalmic operation, the capsular dilation device, a regulatory member provided inside the capsular dilation device, and the like. The capsular expansion device is composed of an optical portion provided inside the regulating member and elastically deformed, and the capsular expansion device is provided with an anterior support portion provided in contact with the inner surface of the anterior capsule and the anterior portion on the posterior side of the anterior support portion. The posterior support portion provided in contact with the inner surface of the posterior capsule while facing the support portion, and the anterior support portion and the posterior support portion in a manner having an urging force in a direction for separating the anterior support portion and the posterior support portion. The regulating member is provided with a front regulating portion which is arranged in front of the optical portion and has an opening formed in the center, and a rear regulating portion which is arranged behind the optical portion. A plurality of regulating member connecting portions for connecting the front regulating portion and the rear regulating portion are provided, and the optical portion is provided with a plurality of projecting portions projecting radially outward at the peripheral portion along the circumferential direction. The central portion is exposed from the opening of the front regulating portion, and the protruding portions of the peripheral portion are exposed and exposed radially outward from between the connecting portions for the regulating member adjacent to each other. Is locked to the equatorial region of the capsular bag.

According to this, the anterior support part presses the inner surface of the anterior capsule by the urging force of the connecting part, and the posterior support part presses the inner surface of the posterior capsule, so that the peripheral part of the equatorial part of the capsular bag moves in the anteroposterior direction. At the same time that the equator of the capsular bag expands in an attempt to extend and expand, the equator of the capsular bag moves afferently and the diameter of the equator of the capsular bag shrinks. As a result, the zonule of Zinn is pulled in both the direction of the capsular bag and the ciliary body, and the zonule of Zinn is continuously tensioned with an appropriate strength, and as a result, the capsular bag is tensioned appropriately. Therefore, the zonule of Zinn can accurately transmit the slight contraction and relaxation of the ciliary muscle of the ciliary body to the capsular bag.

Further, in near vision, the optical portion exposed from between the connecting portion for the regulating member according to the movement of the equatorial portion of the capsular bag when the anterior support portion and the posterior support portion move in the separation direction due to the movement of the capsular bag. When the protruding portion of the lens is pressed inward in the radial direction by the equatorial capsule of the capsular bag, the optical portion tends to be deformed so as to bulge in the front-back direction. At this time, since the peripheral portion of the optical portion is restricted from being deformed in the front-rear direction and / or the radial direction by the regulating member, the central portion of the optical portion greatly bulges forward from the opening of the front regulating portion, and the optical portion The curvature of the central portion can be effectively increased as a convex lens with good optical characteristics.

On the other hand, in the distance view, the optical part exposed from between the connecting parts for the regulating member according to the movement of the equatorial part of the capsular bag when the anterior support part and the rear support part move in the proximity direction due to the movement of the capsular bag. Since the protruding portion is not pressed inward in the radial direction by the equatorial capsule of the capsular bag, the optical portion tends to be deformed in a manner of expanding in the radial direction due to its own elastic force. At this time, since the optical portion is restored to its original shape, the central portion of the optical portion is largely retracted rearward to the opening of the front regulating portion, and the curvature of the central portion of the optical portion can be effectively reduced. ..

According to the present invention, the anterior support portion presses the inner surface of the anterior capsule and the posterior support portion presses the inner surface of the posterior capsule due to the urging force of the connecting portion, so that the tension of an appropriate strength is maintained in the zonule of Zinn. As a result, moderate tension is given to the capsular bag. Therefore, the zonule of Zinn accurately transmits the slight contraction and relaxation of the ciliary muscle of the ciliary body to the capsular bag, and the capsular bag can be deformed.

In addition, during near vision, it is exposed from between the connecting part for the regulating member according to the movement of the connecting part or the equatorial part of the crystalline lens when the anterior support part and the posterior support part move in the separation direction due to the movement of the capsular bag. When the peripheral edge of the optical portion is pressed inward in the radial direction by the connecting portion of the capsular bag device or the equatorial portion of the capsular bag, the optical portion tries to be deformed so as to bulge outward in the anteroposterior direction. At this time, since the peripheral portion of the optical portion is restricted from moving in the front-rear direction and / or the radial direction by the restricting member, the central portion of the optical portion greatly bulges forward from the opening of the front restricting portion, and the optical portion The curvature of the central part of the can be effectively increased.

On the other hand, during distant vision, it was exposed from between the connecting part for the regulating member according to the movement of the connecting part or the equatorial part of the crystalline lens when the anterior support part and the posterior support part move in the proximity direction due to the movement of the capsular bag. When the peripheral edge of the optical portion is not pressed inward in the radial direction by the connecting portion of the capsule device or the equatorial portion of the capsular bag, the optical portion tries to be deformed so as to bulge outward in the radial direction due to its own elastic force. At this time, since the regulation of the peripheral portion by the regulating member is reduced by restoring the original shape of the optical portion, the central portion of the optical portion is largely retracted rearward to the opening of the front regulating portion, and the central portion of the optical portion is restored. Curvature can be effectively reduced.

Therefore, slight contraction and relaxation of the ciliary muscles of the ciliary body through the zonule of Zinn under the condition that the capsular bag is moderately strained and the capsular bag is flexible and deformable. It is accurately transmitted to the capsule, and the optical portion can change with good optical characteristics as a convex lens by a slight movement of the capsular bag in both near vision and far vision. Therefore, since the accommodation function of the accommodative intraocular lens can be effectively expressed, the accommodation function of the accommodation intraocular lens can be brought closer to the natural state of the eye at a younger age.

It is a vertical sectional view which shows the adjustment intraocular lens which concerns on 1st Embodiment. It is (a) plan view and (b) vertical sectional view which shows the expansion device of a capsular bag. It is (a) plan view, (b) vertical sectional view, (c) side view which shows the regulation member provided with the optical part. It is a vertical cross-sectional view which shows the operation of the adjustment intraocular lens. It is a vertical cross-sectional view which shows the modification of the optical part of FIG. It is a top view which shows the regulation member provided with the optical part in the adjustment intraocular lens which concerns on 2nd Embodiment. It is a top view which shows the modification of the optical part of FIG. It is a vertical cross-sectional view which shows the optical part in the adjustment intraocular lens which concerns on 3rd Embodiment. It is (a) plan view and (b) vertical sectional view which shows the adjustment intraocular lens which concerns on 4th Embodiment. It is a top view which shows the regulation member provided with the optical part in the accommodation intraocular lens of FIG. It is a top view which shows the adjustment intraocular lens which concerns on 5th Embodiment. It is a top view which shows the regulation member provided with the optical part in the adjustment intraocular lens which concerns on 6th Embodiment. It is a vertical sectional view which shows the regulation member provided with the optical part in the XIII-XIII cross section of FIG. It is a top view which shows the regulation member provided with the optical part in the adjustment intraocular lens which concerns on 7th Embodiment. It is a side view which shows the movement at the time of a focus adjustment in a human eye.

<First Embodiment>
Next, the first embodiment of the adjustable intraocular lens according to the present invention will be described with reference to FIGS. 1 to 4.

As shown in FIG. 1, the accommodative intraocular lens 1 includes a capsular bag expansion device (hereinafter referred to as a device 10), a regulating member 20 provided inside the device 10, and an optical unit provided inside the regulating member 20. It has 30. The direction indicated by the arrow A in the drawing will be referred to as the front, and the opposite direction will be referred to as the rear.

[Device configuration]
As shown in FIG. 2, the device 10 is installed in the capsular bag S in which the anterior capsule Sf is incised in an ophthalmic operation such as cataract surgery, refractive surgery or presbyopia corrective surgery. Is to be done. As shown in FIG. 1, the device 10 includes an anterior support portion 11 located on the anterior side in the capsular bag S, a posterior support portion 12 located on the posterior side in the capsular bag S, and an anterior support portion 11 and a posterior portion. It is provided with a connecting portion 13 for connecting the supporting portion 12. The front support portion 11 is an annular elastic member having an opening 11a formed in the center. The front support portion 11 has an inclined surface 11b that gradually inclines backward toward the outer peripheral edge portion 11d from the inner peripheral edge portion 11c on the front surface side. Therefore, when the anterior support portion 11 is provided in a manner of contacting the inner surface of the anterior capsule Sf of the capsular capsule S in cataract surgery or the like, the contact load on the anterior capsule Sf can be reduced by the inclined surface 11b. Further, since the front support portion 11 is made of an elastic material, it is slightly deformed according to the force received from the front capsule Sf, and the contact load between the front support portion 11 and the front capsule Sf can be further reduced.

Further, the front support portion 11 has a diameter of the outer peripheral edge portion 11d of 7. based on the fact that the diameter of a general crystalline lens is about 9 to 10.5 mm and the thickness of the front support portion 11 is about 3.5 to 6.0 mm. The diameter of the opening 11a (inner peripheral edge 11c) is 5.0 mm, the width of the inclined surface 11b in contact with the anterior capsule Sf is 1.5 mm, and the thickness is 0.2 to 0.6 mm.

Further, the front support portion 11 is provided with a groove 11e extending in the radial direction from the inner peripheral edge portion 11c to the outer peripheral edge portion 11d on the front surface, and a groove 11f extending in the circumferential direction over the entire circumference. Since the grooves 11e and 11f are provided in this way, the anterior aqueous humor flows from the inner peripheral edge portion 11c through the groove 11e on the inner peripheral edge side into the groove 11f and comes into contact with the anterior capsule Sf of the capsular bag S. By flowing out from the outer peripheral edge portion 11d through the groove 11e on the outer peripheral edge side, the chemical mediators such as cytokines secreted from the crystalline lens epithelial cells remaining in the anterior capsule Sf of the crystalline lens capsule S and promoting the proliferation of the crystalline lens epithelial cells are washed away. be able to.

Further, the front support portion 11 includes six front wing portions 11g extending outward in the radial direction, and each front wing portion 11g is provided along the circumferential direction of the front support portion 11 at a predetermined distance from each other. ing. Since the anterior wing portion 11g is formed so as to become thinner toward the tip, the outer portion of the anterior capsule Sf can be softly pressed forward while increasing the degree of curvature toward the tip. Further, since the anterior wing portion 11g is provided with a groove 11h extending in the circumferential direction of the anterior support portion 11 on the front surface, the anterior aqueous humor flows into the groove 11h and comes into contact with the outer portion of the anterior capsule Sf of the crystalline lens capsule S. This makes it possible to wash away chemical mediators such as cytokines that are secreted from the lens epithelial cells remaining in the outer portion of the anterior capsule Sf of the lens capsule S and promote the proliferation of the lens epithelial cells.

As shown in FIG. 2, the rear support portion 12 is an annular elastic member having an opening 12a formed in the center, like the front support portion 11, and is a front support portion 11 on the rear side of the front support portion 11. It is arranged so as to face parallel to. The rear support portion 12 has an inclined surface 12b on the rear surface side that gradually inclines forward from the inner peripheral edge portion 12c toward the outer peripheral edge portion 12d. Therefore, when the posterior support portion 12 is provided so as to be in contact with the inner surface of the posterior capsule Sb of the capsular capsule S, the contact load on the posterior capsule Sb can be reduced by the inclined surface 12b. Further, since the posterior support portion 12 is made of an elastic material, it is slightly deformed according to the force received from the posterior capsule Sb, and the contact load between the posterior support portion 12 and the posterior capsule Sb can be further reduced.

Further, the posterior support portion 12 has a diameter of 7.0 mm at the outer peripheral edge, a diameter of 5.0 mm at the opening 12a (inner peripheral edge), and an inclination in contact with the posterior capsule Sb, based on the size of a general crystalline lens. The surface 12b has a width of 2.0 mm and a thickness of 0.9 mm to 0.4 mm from the inner peripheral edge to the outer peripheral edge. In this way, by setting the width of the posterior support portion 12 to be larger than that of the anterior support portion 11, the posterior support portion 12 contacts the posterior capsule Sb more widely than the anterior support portion 11 contacts the anterior capsule Sf. The posterior support portion 12 can be stably arranged in the capsular bag S. The thickness of the rear support portion 12 is preferably formed so as to gradually decrease from the inner peripheral edge portion 12c toward the outer peripheral edge portion 12d.

Further, as shown in FIG. 2, the rear support portion 12 includes six rear wing portions 12e extending outward in the radial direction, and the rear wing portions 12e are provided with each other along the circumferential direction of the rear support portion 12. It is provided at a predetermined interval.

As shown in FIG. 2, the connecting portion 13 is composed of six connecting pieces 131 provided at predetermined intervals along the circumferential direction of the front supporting portion 11 and the rear supporting portion 12. The connecting piece 131 is a thin plate-shaped member made of an elastic material such as synthetic resin, and one end thereof is fixed to the rear surface side of the front support portion 11 in an orthogonal direction or slightly radially outward. The other end is fixed to the front surface side of the rear support portion 12 in an orthogonal direction or slightly radially outward.

Further, the connecting portion 13 connects the front supporting portion 11 and the rear supporting portion 12 at predetermined intervals in a natural state in which the connecting piece 131 is not elastically deformed. This predetermined interval is long enough to allow the connecting piece 131 to bend slightly when the device 10 is placed in the capsular bag S.

Further, when the front support portion 11 and the rear support portion 12 move in a direction close to each other, the connecting portion 13 bends in a manner in which the front support portion 11 and the rear support portion 12 expand radially outward. Therefore, when the device 10 is installed in the capsular bag S, the connecting piece 131 is in a state of being bent outward in the radial direction, and the front support portion is utilized by utilizing the elastic force generated at that time to return to the original state. The rear support portion 12 is urged to be separated from the rear support portion 12. Therefore, the connecting portion 13 efficiently extends and expands the anterior capsule Sf and the posterior capsule Sb in the anterior-posterior direction by the urging force of the plurality of connecting pieces 131, and at the same time expands the equatorial portion Se of the capsular capsule. , The equatorial section of the capsular se can be afferently moved to give moderately strong tension to the zonule Z and the capsular S.

Further, the connecting portion 13 is preliminarily formed with a bent portion 132 for bending the connecting piece 131 so as to extend radially outward of the front support portion 11 and the rear support portion 12. Therefore, when the front support portion 11 and the rear support portion 12 move in the proximity direction as described later, the connecting portion 13 can be reliably bent in a manner in which the connecting portion 13 expands radially outward based on the bent portion 132.

In the present embodiment, since the bent portion 132 is formed in a U-shape or a V-shape, the optical portion 30 can be securely locked from the front-rear direction as described later.

Each of these bent portions 132 moves in a direction in which the front support portion 11 and the rear support portion 12 move in a direction in which they are separated from each other in the radial direction when the degree of expansion to the outside in the radial direction of the connecting portion 13 increases due to the movement of the front support portion 11 and the rear support portion 12 in the proximity direction. The distance between the opposing bent portions 132 becomes longer. On the other hand, each bent portion 132 moves in a direction close to each other in the radial direction when the degree of expansion of the connecting portion 13 outward in the radial direction becomes smaller due to the movement of the front support portion 11 and the rear support portion 12 in the separating direction. , The distance between the opposing bent portions 132 becomes shorter.

Further, in the present embodiment, as shown in FIG. 1, the device 10 has a convex lens 40 fitted in the opening 12a of the rear support portion 12. According to this, the optical unit 30 can be used mainly for the purpose of obtaining an accommodation force, and the convex lens 40 provided on the rear support unit 12 can be used for the purpose of obtaining a refractive power according to the patient's symptom.

[Structure of regulatory members]
As shown in FIG. 3, the restricting member 20 is located on the side of the front restricting portion 21 arranged in front of the optical portion 30, the rear regulating portion 22 arranged behind the optical portion 30, and the optical portion 30. It is arranged and includes six regulating member connecting portions 23 that connect the front regulating portion 21 and the rear regulating portion 22.

The front regulating portion 21 is an annular rigid member having an opening 21a formed in the center, and has an outer peripheral edge diameter of 5.4 mm to 7.8 mm and an opening 21a (inner peripheral edge) diameter of 5.0 mm. It is formed to have a thickness of about 7.0 mm and a thickness of 0.4 mm to 0.8 mm. As shown in FIG. 3B, the front regulating portion 21 is provided so as to have its rear surface substantially horizontal so as to be along the front surface of the peripheral edge portion 32 of the optical portion 30. Therefore, the front regulating portion 21 can surely come into contact with the front surface of the peripheral edge portion 32 of the optical portion 30 as described later.

The rear regulating portion 22 is an annular rigid member having an opening 22a formed in the center, and has an outer peripheral edge diameter of 5.4 mm to 7.8 mm and an opening 22a (inner peripheral edge) diameter of 5.0 mm. It is formed to have a thickness of about 7.0 mm and a thickness of 0.4 mm to 0.8 mm. As shown in FIG. 3B, the rear regulating portion 22 is provided so as to have its front surface substantially horizontal so as to be along the rear surface of the peripheral edge portion 32 of the optical portion 30. Therefore, the rear regulating portion 22 can surely come into contact with the rear surface of the peripheral edge portion 32 of the optical portion 30 as described later.

The regulating member connecting portion 23 is a plate-shaped rigid member curved outward in the radial direction, and has a length of 0.8 mm to 2.5 mm in the front-rear direction and a width of 0.5 mm to 2 in the circumferential direction. It is formed to have a thickness of 0.0 mm and a thickness of 0.3 mm to 0.6 mm, and one end is fixed to the outer peripheral edge of the front regulating portion 21 in a radial outward direction, and the other end is outside the rear regulating portion 22. It is fixed to the peripheral edge in a radial outward direction.

The restricting member connecting portion 23 is provided along the circumferential direction of the front regulating portion 21 and the rear regulating portion 22 at a predetermined interval of 0.5 mm to 2.0 mm. Therefore, the regulating member connecting portion 23 can abut on the peripheral edge portion 32 of the optical portion 30 at predetermined intervals, and can expose the peripheral edge portion 32 of the optical portion 20 at predetermined intervals. As shown in FIG. 3B, the restricting member connecting portion 23 is gently curved outward in the radial direction along the peripheral edge portion 32 of the optical portion 30, and thus the optical portion is described later. The peripheral portion 32 of 30 can be brought into close contact with the peripheral portion 32.

Further, the restricting member connecting portion 23 connects the front regulating portion 21 and the rear regulating portion 22 at predetermined intervals. This predetermined interval is such that when the optical portion 30 is provided inside the regulating member 20, the front regulating portion 21 and the rear regulating portion 22 can naturally come into contact with the front surface and the rear surface of the peripheral edge portion 32 of the optical unit 30. It is preferably the length. The regulation unit 20 and the optical unit 30 may be provided by integral molding.

[Structure of optical part]
As shown in FIG. 3B, the optical portion 30 is a convex lens formed by integral molding with an elastic film 33 having a thickness of 10 to 200 μm, and is filled with a fluid substance 34. According to this, the peripheral portion 32 of the optical portion 30 has less local distortion, and the peripheral portion 32 is likely to be deformed uniformly as a whole, and the central portion 31 of the optical portion 30 is also uniformly deformed accordingly. It becomes easier to do.

Further, the optical unit 30 has elasticity similar to that of a young crystal body such as a silicon polymer, an acrylic polymer, a segmented polyurethane, a temperature-responsive shape memory hydrophobic acrylic, a Hydroxyethyl Methacrylate, a photocurable resin, or a hydrogel. It is made of material. According to this, the optical portion 30 can be effectively deformed in the front-rear direction because the peripheral edge portion 32 is easily elastically deformed when the peripheral portion 32 receives a force in the radial direction by the connecting portion 13.

Further, the optical portion 30 is formed with a diameter of 6.0 mm to 8.0 mm and a maximum thickness of 0.4 mm to 1.5 mm, and the diameters are the same as the distance between the regulating member connecting portions 23 facing each other. It is formed. Therefore, when the optical portion 30 is provided inside the regulating member 20, the front surface of the peripheral edge portion 32 comes into contact with the rear surface of the front regulating portion 21, and the rear surface of the peripheral edge portion 32 is in front of the rear regulating portion 22. At the same time, the peripheral edge portion 32 comes into close contact with the inner surface of the regulating member connecting portion 23 at predetermined intervals.

Further, in the optical unit 30, the peripheral edge portion 32 is exposed from between the regulating member connecting portions 23 at predetermined intervals, and the connecting portion 13 of the device 10 is locked to the exposed peripheral edge portion 32. Therefore, the peripheral edge portion 32 of the optical portion 30 exposed from between the connecting portions 23 for the regulating member may be pressed inward in the radial direction by the connecting portion 13, or may not be pressed inward in the radial direction by the connecting portion 13.

In particular, in the present embodiment, the optical portion 30 is formed to have a diameter larger than that of the front regulating portion 21 and the rear regulating portion 22 of the regulating member 20. As a result, the area where the peripheral edge portion 32 of the optical portion 30 is exposed from between the regulating member connecting portions 23 becomes large, so that the peripheral edge portion 32 of the optical portion 30 exposed from between the regulating member connecting portions 23 is exposed by the connecting portion 13. It is easy to be pressed inward in the radial direction.

Further, in the optical unit 30, the front central portion 31a is exposed from the opening 21a of the front regulating portion 21. Therefore, the peripheral edge portion 32 of the optical portion 30 exposed from between the connecting portions 23 for the regulating member is pressed inward in the radial direction by the connecting portion 13 of the device 10, so that the central portion 31a in front of the optical portion 30 is moved forward. It can bulge forward from the opening 21a of the regulating portion 21. At this time, the peripheral edge portion 32 of the optical portion 30 is restricted from being deformed in the front-rear direction by the front regulating portion 21 and the rear regulating portion 22 of the regulating member 20, and is also deformed in the radial direction by the regulating member connecting portion 23 of the regulating member 22. Therefore, the central portion 31a in front of the optical portion 30 can greatly bulge forward from the opening 21a of the front restricting portion 21. On the other hand, the peripheral edge portion 32 of the optical portion 30 exposed from between the connecting portions 23 for the regulating member is not pressed inward in the radial direction by the connecting portion 13 of the device 10, so that the central portion 31a in front of the optical portion 30 is restricted forward. It can be greatly retracted to the opening 21a of the portion 21.

Further, in the optical unit 30, the rear central portion 31b is exposed from the opening 22a of the rear regulating portion 22. Therefore, the peripheral edge portion 32 of the optical portion 30 exposed from between the connecting portions 23 for the regulating member is pressed inward in the radial direction by the connecting portion 13 of the device 10, so that the central portion 31b behind the optical portion 30 is rearward. It can greatly bulge rearward from the opening 22a of the regulating portion 22. On the other hand, the peripheral edge portion 32 of the optical portion 30 exposed from between the connecting portions 23 for the regulating member is not pressed inward in the radial direction by the connecting portion 13 of the device 10, so that the central portion 31b behind the optical portion 30 is rearwardly regulated. It can be greatly retracted to the opening 22a of the portion 22.

[Operation of adjustable intraocular lens]
Next, the operation of the accommodative intraocular lens 1 installed in the capsular S will be described.

First, as shown in FIG. 4A, the anterior support portion 11 presses the inner surface of the anterior capsule Sf by the urging force of the connecting portion 13, and the posterior support portion 12 presses the inner surface of the posterior capsule Sb. A moderate amount of tension is continuously applied to the zonule Z, and as a result, a moderate amount of tension is applied to the capsular bag S. As a result, the zonule Z of Zin can accurately transmit the slight contraction and relaxation of the ciliary muscle Cm of the ciliary body C to the capsular bag S.

When looking closer (when adjusting), as shown in FIG. 4 (a), the ciliary muscle Cm of the ciliary body C relaxes and the ciliary body C is located on the outer side in the circumferential direction. As shown in FIG. 4 (b), the ciliary muscle Cm of the ciliary body C contracts and is afferent from the state where the zonule Zin and the capsular bag S are tense by pulling the Z and the capsular bag S. It protrudes to (capsular S side) and the degree of tension of Zonule Z is reduced. As a result, the tension in the peripheral portion of the equatorial portion Se of the capsular bag is relaxed, so that the anterior support portion 11 and the posterior support portion 12 are urged by the urging force of the connecting portion 13, and the distance direction is increased while resisting the tension of the zonule Z. I will move to.

At this time, the connecting piece 131 elastically deforms and returns to a natural state, and the degree to which the connecting portion 13 bends outward in the radial direction becomes small. Therefore, the bending portions 132 move in the proximity direction to each other and face each other. The distance of the part 132 becomes shorter. Then, the peripheral edge portion 32 of the optical portion 30 exposed from between the connecting portions 23 for the regulating member is pressed inward in the radial direction by the connecting portion 13, so that the optical portion 30 tries to be deformed so as to bulge in the front-rear direction. At this time, the peripheral portion 32 of the optical portion 30 is restricted from being deformed in the front-rear direction by the regulating member 20, and the radial deformation is regulated by the regulating member connecting portion 23 of the regulating member 20. The front central portion 31a bulges forward greatly from the opening 21a of the front regulation portion 21, and the curvature of the front central portion 31a of the optical portion 30 can be effectively increased. Similarly, the central portion 31b behind the optical portion 30 bulges rearwardly from the opening 22a of the rear regulating portion 22, and the curvature of the central portion 31b behind the optical portion 30 can be effectively increased.

On the other hand, when looking at a distance (when not accommodating), as shown in FIG. 4 (b), the ciliary muscle Cm of the ciliary body C contracted, and the degree of tension of the zonule Z of Zin and the capsular bag S decreased. From the state, as shown in FIG. 4A, the ciliary muscle Cm of the ciliary body C is relaxed, and the ciliary body C is located outward in the circumferential direction, so that the zonule Z of Zin and the capsular bag S are formed. By pulling, the degree of tension of the chin zonule Z increases. As a result, the tension in the peripheral portion of the equatorial portion Se of the capsular bag becomes high, so that the anterior support portion 11 and the posterior support portion 12 are urged by the anterior capsule Sf and the posterior capsule Sb of the capsular capsule S, and the urging force by the connecting portion 13. It moves in the near direction while resisting.

At this time, the connecting piece 131 elastically deforms and contracts in the front-rear direction, and the degree to which the connecting portion 13 expands outward in the radial direction increases. Therefore, the bent portions 132 move in the direction away from each other and face the bent portions. The distance of 132 becomes longer. Then, the peripheral edge portion 32 of the optical portion 30 exposed from between the connecting portions 23 for the regulating member is not pressed inward in the radial direction by the connecting portion 13, so that the optical portion 30 expands in the radial direction due to its own elastic force. Try to transform. At this time, since the optical unit 30 is restored to its original shape, the central portion 31a in front of the optical unit 30 is greatly retracted to the opening 21a of the front restricting unit 21, and the curvature of the central portion 31a in front of the optical unit 30 is reduced. It can be effectively reduced. Similarly, the central portion 31b behind the optical portion 30 can be greatly retracted to the opening 22a of the rear regulating portion 22, and the curvature of the central portion 31b behind the optical portion 30 can be effectively reduced.

Therefore, an appropriate tension is applied to the zonule Z of Zin and the capsular bag S, and the zonule Z of Zin accurately transmits the slight contraction and relaxation of the ciliary muscle Cm of the ciliary body C to the capsular bag S. Originally, in both near vision and far vision, the curvature of the optical unit 30 can be effectively changed by a slight movement of the capsular bag S. Therefore, since the accommodation function of the accommodative intraocular lens 1 can be effectively expressed, the accommodation function of the accommodative intraocular lens can be brought closer to the eye in a natural state when younger.

When the optical unit 30 is to be deformed so as to bulge in the front-rear direction, the front regulation unit 21 and the rear regulation unit 22 of the regulation member 20 may move slightly in the separation direction as the optical unit 30 is deformed. In this case, the connecting portions 23 for each regulating member move in the proximity direction to each other and press the peripheral edge portion 32 of the optical portion 30 inward in the radial direction. Therefore, in the optical unit 30, the peripheral edge portion 32 is pressed inward in the radial direction by the connecting portion 13 of the device 10 and the restricting member connecting portion 23 of the regulating member 20, so that the optical portion 30 is not distorted in the radial direction. It can be effectively and widely deformed, and the optical unit 30 can be greatly deformed with good optical characteristics.

(Modification 1-1)
As shown in FIG. 5A, the optical portion 30 according to this modification is formed of an elastic film 33 having a peripheral portion 32 having a thickness of 100 to 200 μm and a front and rear central portions 31 having a thickness of 20 to 50 μm. ing. According to this, since the peripheral portion 32 of the optical portion 30 is thick and the central portion 31 of the optical portion 30 is formed thin, the central portion 31 of the optical portion 30 is easily deformed, so that the optical portion 30 is optical. It can be deformed effectively with good characteristics.

(Modification 1-2)
As shown in FIG. 5B, the optical portion 30 according to this modification has a peripheral portion 32 having a thickness of 100 to 200 μm, a front central portion 31a having a thickness of 20 to 50 μm, and a rear central portion 31b having a thickness of 100 to 100. It is formed of an elastic film 33 having a thickness of 250 μm. According to this, since the front central portion 31a of the optical portion 30 is formed thin and the rear central portion 31b is formed thick, the central portion 31 of the optical portion 30 is easily deformed forward and is difficult to be deformed backward. The crystalline lens can be reproduced in a pseudo manner.

(Modification 1-3)
As shown in FIG. 5C, the optical portion 30 according to this modification has a front and / or rear central portion 31 configured separately from the peripheral edge portion 32. Specifically, the front central portion 31a and the rear central portion 31b formed of the elastic film 33 having a thickness of 20 to 50 μm are attached to the peripheral edge portion 32 formed of the ring-shaped member. .. According to this, the front and / or rear central portions 31a and 31b can be formed as thin elastic films, while the other portions can be formed separately as thick elastic films, so that the optical portions 30 having different thicknesses can be easily formed. Can be manufactured.

(Modification 1-4)
As shown in FIG. 5D, the optical portion 30 according to the present modification is formed in a flat shape as a whole, and a bulging portion 32a in a form that bulges inward on the inner surface of the peripheral edge portion 32 is formed. .. According to this, when the optical portion 30 is deformed in the front-rear direction, the peripheral portion 32 of the optical portion 30 is likely to be constricted in the vicinity of the bulging portion 32a, and accordingly, the central portion 31 of the optical portion 30 is moved to the front regulating portion 21. It becomes easy to bulge forward from the opening 21a of.

<Second embodiment>
Next, a second embodiment of the adjustable intraocular lens according to the present invention will be described with reference to FIGS. 6 to 7.

As shown in FIG. 6, the optical portion 30 of the present embodiment is elastically deformed inside the regulating member 20 so that the peripheral edge portion 32 projects radially outward from between the adjacent regulating member connecting portions 23. It is exposed in. According to this, the area where the peripheral edge portion 32 of the optical portion 30 is exposed from between the regulating member connecting portions 23 becomes larger, so that the peripheral edge portion 32 of the optical portion 30 exposed from between the regulating member connecting portions 23 becomes larger. The connecting portion 13 makes it easier to be pressed inward in the radial direction.

(Modification 2-1)
As shown in FIG. 7, the optical unit 30 of this modification is provided with a plurality of projecting portions 32b protruding outward in the radial direction at a predetermined interval along the circumferential direction at the peripheral edge portion 32. When the optical portion 30 is provided inside the regulating member 20, the protruding portion 32b is exposed in a manner of projecting radially outward from between the regulating member connecting portions 23. According to this, the area where the peripheral edge portion 32 of the optical portion 30 is exposed from between the regulating member connecting portions 23 becomes larger, so that the peripheral edge portion 32 of the optical portion 30 exposed from between the regulating member connecting portions 23 becomes larger. The connecting portion 13 makes it easier to be pressed inward in the radial direction.

<Third embodiment>
Next, a third embodiment of the adjustable intraocular lens according to the present invention will be described with reference to FIG.

As shown in FIG. 8, the optical unit 30 of the present embodiment is provided with a convex lens 35 having a refractive power suitable for the patient's case at the rear central portion 31b via a ring member 36. According to this, since the central portion 31 of the optical portion 30 is less likely to be deformed backward due to the convex lens 35, the central portion 31 of the optical portion 30 is easily deformed forward and is difficult to be deformed backward at the time of adjustment. Can be reproduced in. Further, by changing the power of the convex lens 35 in the optical unit 30, the refractive index of the optical unit 30 can be easily changed according to the patient's condition.

<Fourth Embodiment>
Next, a fourth embodiment of the adjustable intraocular lens according to the present invention will be described with reference to FIGS. 9 and 10. In each figure, the right half represents the state at the time of near vision, and the left half represents the state at the time of far vision.

As shown in FIGS. 9 and 10, the optical unit 30 of the present embodiment is provided with eight projecting portions 32b projecting outward in the radial direction at the peripheral edge portion 32 at predetermined intervals along the circumferential direction. Then, in the optical portion 30, the central portion 31 is exposed from the opening portion 11a of the front regulating portion 11, and the protruding portions 32b of the peripheral portion 32 project radially outward from between the regulating member connecting portions 23 adjacent to each other. It is exposed in the manner of Then, the exposed protruding portion 32b is further exposed in a manner of protruding from between the connecting pieces 131 of the connecting portion 13 of the device 10, and is directly locked to the equatorial portion Se of the capsular bag.

Further, the connecting portion 13 connects the outer peripheral edge portion of the front support portion 11 and the outer peripheral edge portion of the rear support portion 12. Specifically, as shown in FIG. 9A, the connecting portion 13 is provided with eight connecting pieces 131 provided at predetermined intervals along the circumferential direction of the front support portion 11 and the rear support portion 12. One end of each connecting piece 131 is fixed to the outer peripheral edge of the front support portion 11 in a radial outward direction, and the other end is radially outer to the outer peripheral edge of the rear support portion 12. It is fixed in a manner toward. As a result, the curvature of the central portion 31 of the optical portion 30 can be effectively changed according to the bending of the connecting portion 13.

Next, the operation of the adjustable intraocular lens 1 according to the fourth embodiment will be described.

When looking closer (when adjusting), as shown in the left half of Fig. 9 (b), the ciliary muscle Cm of the ciliary body C relaxes and the ciliary body C is located on the outer side in the circumferential direction. By pulling the zonule Z and the capsular bag S, the ciliary muscle Cm of the ciliary body C contracts from the state in which the zonule Z and the capsular bag S are tense, as shown in the right half of FIG. 9B. Then, it protrudes afferently (capsular S side), and the degree of tension of the zonule Z of Zin decreases. As a result, the tension in the peripheral portion of the equatorial portion Se of the capsular bag is relaxed, so that the anterior support portion 11 and the posterior support portion 12 are urged by the urging force of the connecting portion 13, and the distance direction is increased while resisting the tension of the zonule Z. I will move to.

At this time, the capsular bag S is urged by the anterior support portion 11 and the posterior support portion 12 and swells in the anteroposterior direction, while contracting in the radial direction. Therefore, the distance between the inner surfaces of the capsular bag equatorial region Se is short. Become. Then, the protruding portion 32b of the optical portion 30 exposed from between the connecting portions 23 for the regulating member is pressed inward in the radial direction by the equatorial portion Se of the capsular bag, so that the optical portion 30 tries to be deformed so as to bulge in the front-rear direction. To do. At this time, the peripheral portion 32 of the optical portion 30 is restricted from being deformed in the front-rear direction by the regulating member 20, and the radial deformation is regulated by the regulating member connecting portion 23 of the regulating member 20. The front central portion 31a bulges forward greatly from the opening 21a of the front regulation portion 21, and the curvature of the front central portion 31a of the optical portion 30 can be effectively increased. Similarly, the central portion 31b behind the optical portion 30 bulges rearwardly from the opening 22a of the rear regulating portion 22, and the curvature of the central portion 31b behind the optical portion 30 can be effectively increased.

On the other hand, when looking at a distance (when not accommodating), as shown in the right half of FIG. 9B, the ciliary muscle Cm of the ciliary body C contracts and the degree of tension of the zonule Z of Zin and the capsular bag S increases. From the lowered state, as shown in the left half of FIG. 9B, the ciliary muscle Cm of the ciliary body C relaxes and the ciliary body C is located on the outer side in the circumferential direction, so that the zonule Z of Zin and the crystalline lens are formed. By pulling the capsule S, the degree of tension of the zonule Z of Zin increases. As a result, the tension in the peripheral portion of the equatorial portion Se of the capsular bag becomes high, so that the anterior support portion 11 and the posterior support portion 12 are urged by the anterior capsule Sf and the posterior capsule Sb of the capsular capsule S, and the urging force by the connecting portion 13. It moves in the near direction while resisting.

At this time, the capsular bag S contracts in the anterior-posterior direction along with the movement of the anterior support portion 11 and the posterior support portion 12, while being pulled by the zonule Z of Zin and expanding in the radial direction. Increases the distance between the inner surfaces facing each other. Then, the protruding portion 32b of the optical portion 30 exposed from between the connecting portions 23 for the regulating member is not pressed inward in the radial direction by the connecting portion 13, so that the optical portion 30 expands in the radial direction due to its own elastic force. Try to transform. At this time, since the optical portion 30 is restored to its original shape, the central portion 31a in front of the optical portion 30 is largely retracted rearward to the opening 21a of the front restricting portion 21, and the central portion 31a in front of the optical portion 30 The curvature can be effectively reduced. Similarly, the central portion 31b behind the optical portion 30 can be greatly retracted rearward to the opening 22a of the rear regulating portion 22, and the curvature of the central portion 31b behind the optical portion 30 can be effectively reduced.

<Fifth Embodiment>
Next, a fifth embodiment of the adjustable intraocular lens according to the present invention will be described with reference to FIG.

In the optical unit 30 of the present embodiment, a peripheral edge portion 32 exposed from between the regulatory member connecting portions 23 adjacent to each other is locked to the capsular capsule equatorial portion Se via a locking member 50. According to this, a slight movement of the capsular bag S is transmitted to the peripheral edge portion 32 of the optical portion 30 via the locking member 50.

<Sixth Embodiment>
Next, a sixth embodiment of the adjustable intraocular lens according to the present invention will be described with reference to FIGS. 12 to 13.

In the regulating member 20 of the present embodiment, a plurality of wide second regulating member connecting portions 24 are provided along the circumferential direction between the front regulating portion 21 and the rear regulating portion 22. The second regulating member connecting portion 24 is arranged at a position between the respective regulating member connecting portions 23, whereby a plurality of narrow flow holes through which the fluid substance inside the optical portion 30 flows. 25 are provided at equal intervals along the circumferential direction.

According to this, the movement of the front regulating portion 21 and the rear regulating portion 22 in the front-rear direction is restricted by the second regulating member connecting portion 24.

Therefore, during near vision, as shown in FIG. 13, the peripheral edge portion 32 of the optical portion 30 exposed from between the connecting portions 23 for the regulating member is pressed inward in the radial direction by the connecting portion 13 of the capsular bag expansion device 10. As a result, the fluid substance inside the optical portion 30 flows into the central portion 31 from the peripheral portion 32 of the optical portion 30 through the plurality of flow holes 25 formed between the connecting portions 24 for the second regulating member. Therefore, the central portion 31 of the optical portion 30 can uniformly bulge forward from the opening 21a of the front regulating portion 21. Note that FIG. 13 partially illustrates a state in which the connecting piece 131 of the connecting portion 13 presses the peripheral edge portion 32 of the optical portion 30 exposed from the regulating member 20 inward in the radial direction.

On the other hand, when viewed from a distance, the peripheral edge portion 32 of the optical portion 30 exposed from between the connecting portions 23 for the regulating member is not pressed inward in the radial direction by the connecting portion 13 of the capsular expansion device 10, so that the optical portion 30 is not pressed. Since the fluid substance inside flows into the peripheral portion 32 from the central portion 31 of the optical portion 30 through the plurality of flow holes 25 formed between the connecting portions 24 for the second regulating member, the center of the optical portion 30 The portion 31a can be uniformly retracted to the opening 21a of the front regulating portion 21.

<7th Embodiment>
Next, a seventh embodiment of the adjustable intraocular lens according to the present invention will be described with reference to FIG.

In the regulating member 20 of the present embodiment, a plurality of narrow second regulating member connecting portions 24 are provided along the circumferential direction between the front regulating portion 21 and the rear regulating portion 22. The second regulating member connecting portion 24 is arranged at a position facing each regulating member connecting portion 23, whereby a plurality of wide distribution holes 25 through which the fluid substance inside the optical portion 30 flows are arranged. Are provided at equal intervals along the circumferential direction.

According to this, the movement of the front regulating portion 21 and the rear regulating portion 22 in the front-rear direction is restricted by the second regulating member connecting portion 24.

In the above embodiment, the regulating member 20 is made of a rigid member, but may be made of another material such as an elastic member.

Further, the rear regulating portion 22 is formed in an annular shape having an opening 22a in the center, but at least the center may be formed in a transparent plate shape.

Further, the rear regulating portion 22 may be fitted with a lens having a refractive power suitable for the patient's case in the opening 22a.

Further, although the restricting member connecting portion 23 is in close contact with the peripheral edge portion 32 of the optical portion 30, a gap may be provided between the connecting portion 23 and the peripheral edge portion 32 of the optical portion 30.

Further, although the regulating member connecting portion 23 is formed in a shape that is gently curved outward in the radial direction, it may be formed in another shape.

Further, although six connecting portions 23 for the regulating member are provided in the circumferential direction, other connecting portions 23 may be provided.

Further, the peripheral edge portion 32 of the optical portion 30 exposed from between the regulating member connecting portions 23 is directly locked to the connecting portion 13 of the device 10, but the connecting portion 13 is interposed via the locking member. May be locked to. According to this, the peripheral edge portion 32 of the optical portion 30 is easily strongly pressed inward in the radial direction by the connecting portion 13.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and modifications can be made to the illustrated embodiments within the same range as the present invention or within the same range.

1 ... Accommodative intraocular lens 10 ... Capsular dilation device (device)
11 ... Front support 11a ... Opening 11b ... Inclined surface 11c ... Inner peripheral edge 11d ... Outer peripheral edge 11e, 11f ... Groove 11g ... Front wing 11h ... Groove 12 ... Rear support 12a ... Opening 12b ... Inclined surface 12c … Inner peripheral edge 12d… Outer peripheral edge 12e… Rear wing 13… Connecting part 131… Connecting piece 132… Bending part 20… Regulatory member 21… Front regulating part 22… Rear regulating part 23… Connecting part for regulating member 24… No. 2 Control member connecting part 25 ... Flow hole 30 ... Optical part 31 ... Central part 31a ... Front central part 31b ... Rear central part 32 ... Peripheral part 32a ... Swelling part 32b ... Protruding part 33 ... Elastic film 34 ... Flow Sexual substance 35 ... Convex lens 40 ... Convex lens 50 ... Locking member L ... Capsular S ... Capsular sac Se ... Capsular sac Equator Sf ... Anterior capsule of lens Sb ... Posterior capsule of lens C ... Ciliary Cm ... Ciliary Muscle Z ... Chin zonule I ... Iris

Claims (14)

An accommodative intraocular lens that is inserted into the lens capsule from which the contents have been removed during eye surgery.
It is composed of a lens capsule expansion device, a regulating member provided inside the lens capsule expansion device, and an optical portion provided inside the regulating member and elastically deformed.
The lens capsule dilation device is
Anterior support provided in contact with the inner surface of the anterior capsule,
A posterior support portion provided on the posterior side of the anterior support portion in a manner of contacting the inner surface of the posterior capsule while facing the anterior support portion.
A connecting portion for connecting the front support portion and the rear support portion is provided in a manner in which the front support portion and the rear support portion are separated from each other.
The regulatory member
A front regulating portion arranged in front of the optical portion and having an opening formed in the center,
A rear regulating unit arranged behind the optical unit and a rear regulating unit
A plurality of regulating member connecting portions for connecting the front regulating portion and the rear regulating portion are provided.
The central portion of the optical portion is exposed from the opening of the front regulating portion, the peripheral portion is exposed from between the connecting portions for the regulating member adjacent to each other, and the exposed peripheral portion is the lens capsule expansion device. Locked to the connecting part
An adjustable intraocular lens characterized in that the optical portion is formed to have a diameter larger than that of the front regulating portion and the rear regulating portion of the regulating member . The capsular expansion device has a bent portion formed at the connecting portion so as to extend radially outward of the anterior support portion and the posterior support portion.
The accommodative intraocular lens according to claim 1, wherein the optical portion is an exposed peripheral edge portion locked to a bent portion of the connecting portion. The accommodative intraocular lens according to claim 1, wherein the optical portion is exposed in a manner of projecting radially outward from between the regulating member connecting portions of the regulating member. The optical portion is claimed so that a plurality of projecting portions projecting outward in the radial direction are provided along the circumferential direction at the peripheral edge portion, and each projecting portion is exposed in a manner of projecting radially outward from between the connecting portions for regulating members. Item 3. The adjustable intraocular lens according to item 3. The adjustable intraocular lens according to any one of claims 1 to 4, wherein the optical portion is formed of an elastic film having a thickness of 5 to 250 μm and is filled with a fluid substance. The accommodative intraocular lens according to claim 5, wherein the optical portion is formed of an elastic film having a peripheral portion having a thickness of 50 to 250 μm and a central portion having a thickness of 5 to 100 μm. The adjustment according to claim 5, wherein the optical portion is formed of an elastic film having a peripheral portion having a thickness of 50 to 250 μm, a front central portion having a thickness of 5 to 100 μm, and a rear central portion having a thickness of 100 to 250 μm. Intraocular lens. The adjustable intraocular lens according to any one of claims 5 to 7, wherein the optical portion has a bulging portion that bulges inward on the inner surface of the peripheral portion. The adjustable intraocular lens according to any one of claims 5 to 8, wherein the optical portion has a central portion at the front and / or rear separately from a peripheral portion. The adjustable intraocular lens according to any one of claims 1 to 9, wherein the optical portion is provided with a convex lens having a refractive power suitable for the patient's case in the rear central portion. The regulating member according to any one of claims 5 to 10, wherein a plurality of second regulating member connecting portions are provided along the circumferential direction between the front regulating portion and the rear regulating portion. Adjustable intraocular lens. A regulating member for an accommodative intraocular lens used in the accommodative intraocular lens according to any one of claims 1 to 11.
A plurality of front regulating portions arranged in front of the optical portion and having an opening formed in the center, a rear regulating portion arranged behind the optical portion, and a plurality of connecting the front regulating portion and the rear regulating portion. A regulating member for an adjustable intraocular lens, which comprises a connecting portion for a regulating member. The optical unit is provided inside,
The adjusting intraocular lens according to claim 12, wherein the central portion of the optical portion is exposed from the opening of the front regulating portion, and the peripheral portion is exposed from between the connecting portions for the regulating member adjacent to each other. Regulatory member. An accommodative intraocular lens that is inserted into the lens capsule from which the contents have been removed during eye surgery.
It is composed of a lens capsule expansion device, a regulating member provided inside the lens capsule expansion device, and an optical portion provided inside the regulating member and elastically deformed.
The lens capsule dilation device is
Anterior support provided in contact with the inner surface of the anterior capsule,
A posterior support portion provided on the posterior side of the anterior support portion in a manner of contacting the inner surface of the posterior capsule while facing the anterior support portion.
A connecting portion for connecting the front support portion and the rear support portion is provided in a manner in which the front support portion and the rear support portion are separated from each other.
The regulatory member
A front regulating portion arranged in front of the optical portion and having an opening formed in the center,
A rear regulating unit arranged behind the optical unit and a rear regulating unit
A plurality of regulating member connecting portions for connecting the front regulating portion and the rear regulating portion are provided.
In the optical portion, a plurality of projecting portions protruding outward in the radial direction are provided along the circumferential direction in the peripheral portion, the central portion is exposed from the opening of the front regulating portion, and the protruding portions of the peripheral portion are adjacent to each other. An accommodative intraocular lens characterized in that it is exposed in a manner of protruding outward in the radial direction from between the connecting portions for the regulating member, and the exposed protruding portion is locked to the equatorial region of the capsular bag.