JP5770350B1 - Intraocular lens - Google Patents

Abstract

An object of the present invention is to suppress the proliferation of lens epithelial cells in the equator and central equator of the anterior capsule of the lens capsule, and to suppress the occurrence of secondary cataract and postoperative bacterial endophthalmitis due to the proliferation of lens epithelial cells An intraocular lens is provided. An intraocular lens (1) includes an optical unit (10) composed of a lens and a plurality of lens support units (20) provided at a peripheral part of the optical unit (10). The lens support unit (20) is a peripheral part of the optical unit (10). To the optical unit 10 in a manner extending along the circumferential direction. It is locked to the equator part Se of the lens capsule from the intermediate part 22 to the tip part 23, and extends in the radial direction of the optical part 10 on the front side, outside and rear side of the part locked to the equator part Se of the lens capsule. A plurality of protrusions 210 are provided along the length direction of the lens support part 20, and the anterior aqueous humor F flows between the protrusions 210 adjacent to each other and comes into contact with the equator part Se, and then flows out toward the posterior capsule Sb. It is supposed to be. [Selection] Figure 1

Description

  The present invention relates to an intraocular lens that is inserted into a lens capsule from which an anterior capsule of the lens capsule has been incised and contents are removed in a cataract surgery or the like.

  A disease that occurs in the lens of the eye is a cataract that becomes cloudy mainly due to aging, and many patients undergo cataract surgery to treat this cataract.

  At present, ultrasonic lens emulsification is the mainstream for cataract surgery, and this ultrasonic lens emulsification is performed by making a continuous circular incision in the anterior capsule of the lens from a small incision of 2.4 to 3.0 mm. The turbid contents are removed using ultrasonic vibration and suction, and only a transparent capsular bag is formed, and an intraocular lens (IOL) is inserted into the capsular bag.

  However, there is a case where the lens epithelial cells existing in the anterior capsule and the equator in the lens capsule proliferate after the operation and the lens capsule becomes cloudy, and this condition is called secondary cataract. In particular, visual impairment occurs when lens epithelial cells enter the central part of the posterior capsule and the posterior capsule becomes cloudy. It is known that this lens epithelial cell has a high ability to divide and proliferate, particularly in the anterior capsular equator and the central equator.

  For this subsequent cataract, we adopted a shape (sharp edge shape) with an angle on the posterior capsule side of the optical part of the intraocular lens and the edge of the support part. In general, it has been attempted to suppress the subsequent cataract by creating a continuous bent portion and preventing the lens epithelial cells from entering the central portion of the posterior capsule (see, for example, Patent Document 1).

  In addition, it is said that the epithelial cells proliferate due to the adhesion between the anterior capsule and the posterior capsule at the equator, and the subsequent cataract occurs, and there is a thick ring (equatorial ring near the equator of the lens capsule). Some have tried to prevent the subsequent cataract by preventing the adhesion between the anterior capsule and the posterior capsule (see, for example, Patent Document 2). In addition, a disc-type intraocular lens in which the equator ring and the optical part are integrated has been developed. In addition, there is an equatorial ring with sharp edges to enhance the effect of suppressing secondary cataracts.

  Recently, it has been known that anterior aqueous humor has an effect of suppressing secondary cataract. Late cataract is said to start by the secretion of chemical mediators (chemical mediators) such as cytokines from the lens epithelial cells and switching on the growth of lens epithelial cells, and the anterior chamber fluid flows into the lens epithelial cells Thus, a mechanism is considered in which this cytokine is washed away, the lens epithelial cell proliferation is not switched on, and the subsequent cataract is suppressed.

  On the other hand, one of the postoperative complications most feared by ophthalmologists and patients is postoperative bacterial endophthalmitis. Bacteria in the eye during the operation proliferate in the eye and cause inflammation. If early treatment is mistaken, inflammation may spread to the retina and cause blindness. Although the detailed cause of this postoperative endophthalmitis is not known, as shown in FIG. 11B, immediately after the intraocular lens 100 is inserted, the equator portion Se of the capsular bag loses its bulge and becomes flattened. Sf and the posterior capsule Sb adhere to the surface of the intraocular lens 100, and a kind of closed space V where the anterior aqueous humor F does not enter between the intraocular lens 100 and the posterior capsule Sb may be a scaffold for bacterial growth. It is considered.

  That is, when the back of the intraocular lens 100 is not sufficiently cleaned, and blood and eyelid secretions and viscoelastic substances used during the operation remain in the closed space V, the anterior aqueous humor F is in the closed space. Since the immune system, such as macrophages contained in the anterior aqueous humor F, does not enter the V, the bacteria in the aforementioned blood and secretions from the eyelids grow in the closed space V. Therefore, if the intraocular lens and the capsular bag S are not adhered to each other and a space (root) for allowing the anterior aqueous humor F to enter the back of the intraocular lens is secured, postoperative bacterial endophthalmitis This is thought to be effective in suppressing the occurrence of

JP 2007-89810 A Japanese Utility Model Publication No. 5-58118

  The present invention has been made in view of the above-described technical background. First, it suppresses the proliferation of lens epithelial cells in the equator portion of the lens capsule, and causes the occurrence of subsequent cataract caused by the proliferation of lens epithelial cells. It is an object of the present invention to provide an intraocular lens that can be suppressed, and secondly, can suppress the occurrence of postoperative bacterial endophthalmitis.

  In order to achieve the above object, the present invention provides an intraocular lens to be inserted into a capsular bag from which contents have been removed in a cataract surgery or the like, and is provided on an optical part comprising the lens and a peripheral part of the optical part. A plurality of lens support portions, wherein the lens support portions are provided in a form extending from the peripheral portion of the optical portion along the circumferential direction of the optical portion, and at least an intermediate portion is locked to the equator portion of the lens capsule. A plurality of protrusions extending in the radial direction of the optical portion are provided along the length direction of the lens support portion at least on the front side, the outer side, and the rear side of the portion locked to the equator portion of the lens capsule and adjacent to each other An anterior aqueous humor flows between the protruding portions.

  According to this, the anterior aqueous humor flows into the recesses between the adjacent protrusions, and flows in the recesses in order while in contact with the anterior capsule side equator part, the central equator part and the posterior capsule side equator part of the lens capsule. It is possible to wash away chemical mediators such as cytokines secreted from the lens epithelial cells remaining in the equator of the lens capsule and promoting the proliferation of the lens epithelial cells. For this reason, it is possible to suppress the growth of lens epithelial cells in the equator portion of the lens capsule and to suppress the occurrence of secondary cataract caused by the proliferation of lens epithelial cells.

  Further, the anterior aqueous humor can flow out to the posterior capsule side immediately after flowing in the recesses between the adjacent projecting portions. For this reason, anterior aqueous humor becomes easy to flow into the space between the back surface of the intraocular lens which becomes a scaffold for bacterial growth and the posterior capsule, and it becomes possible to suppress the occurrence of postoperative bacterial endophthalmitis.

  Moreover, it is preferable that the said lens support part is formed so that the front-back diameter of the said protrusion part may be larger than the front-back diameter of an optical part. According to this, the protruding part of the lens support part can sufficiently open the equator part of the lens capsule forward and backward, thereby preventing adhesion between the anterior capsule and the posterior capsule and adhesion between the intraocular lens and the lens capsule. For this reason, the anterior aqueous humor passes between the adjacent protrusions of the lens support part and comes into contact with the equator part of the capsular bag in a wider range, and it becomes possible to more effectively suppress the secondary cataract. In addition, the anterior aqueous humor is likely to flow into the space between the back surface of the intraocular lens and the posterior capsule, and the postoperative bacterial endophthalmitis can be more effectively suppressed.

  Moreover, it is preferable that the said lens support part is formed so that the front-back diameter of a base end part may be larger than the front-back diameter of an optical part. According to this, the base end part of the lens support part can sufficiently open the equator part of the lens capsule forward and backward, thereby preventing adhesion between the anterior capsule and the posterior capsule and adhesion between the intraocular lens and the lens capsule. For this reason, the anterior aqueous humor passes between the adjacent protrusions of the lens support part and comes into contact with the equator part of the capsular bag in a wider range, and it becomes possible to more effectively suppress the secondary cataract. In addition, the anterior aqueous humor is likely to flow into the space between the back surface of the intraocular lens and the posterior capsule, and the postoperative bacterial endophthalmitis can be more effectively suppressed.

  Moreover, it is preferable that the said lens support part is latched by the equator part over 75% or more of the perimeter of a lens capsule, combining each lens support part. In particular, the lens support portion is preferably formed in a ring shape in which adjacent lens support portions are connected to each other in the circumferential direction. According to this, the intraocular lens can be reliably locked to the capsular bag, and adhesion between the anterior capsule and the posterior capsule in the equator of the capsular bag can be more reliably prevented. Can be in contact with the equator of the capsular sac over a wide range through the adjacent protrusions of the lens support.

  Moreover, it is preferable that the lens support portion is provided with a concave portion extending in the length direction of the lens support portion on the front side of the base end portion, and the aqueous humor flows into the concave portion. According to this, the anterior aqueous humor comes into contact with the anterior capsule of the lens capsule, thereby washing away chemical transmitters such as cytokines that are secreted from the lens epithelial cells remaining in the anterior capsule of the lens capsule and promote the proliferation of the lens epithelial cells. Can do.

  Further, it is preferable that the lens support portion is provided with a concave portion extending in the circumferential direction of the lens support portion on the front side, the outer side, and the rear side of the base end portion, and the anterior aqueous humor flows into the concave portion. According to this, the anterior aqueous humor is secreted from the lens epithelial cells remaining in the anterior capsule and equator of the lens capsule near the proximal end by contacting the anterior capsule and equator of the lens capsule near the proximal end, Chemical mediators such as cytokines that promote the proliferation of lens epithelial cells can be washed away.

  Further, the lens support portion may be divided so as to be detachable in the length direction. According to this, the length of the lens support portion can be changed before the operation in accordance with the size of the lens capsule predicted by the measurement by the ultrasonic biomicroscope (UBM) or the optical coherence tomography (OCT) before the operation. Therefore, the intraocular lens can be locked in the lens capsule more stably.

  In addition, it is preferable that the lens support portion is provided with irregularities at least at the front end and / or the outer peripheral end portion of the protrusion. According to this, since a space is formed between the equator portion of the lens capsule and the peripheral end portion of the protruding portion, the anterior aqueous humor can easily come into contact with the equator portion of the lens capsule.

  Moreover, it is preferable that the said lens support part is formed so that the front-back diameter of the said protrusion part is 0.8 mm or more, and the protrusion height of the said protrusion part is 0.2 mm or more. In particular, it is preferable that the lens support portion is formed so that the front-rear diameter of the protrusion is 1.0 mm to 2.0 mm and the protrusion height of the protrusion is 0.3 mm to 0.8 mm. According to this, the anterior aqueous humor can surely flow into between the adjacent protrusions. In addition, the protrusion can reliably open the equator of the lens capsule back and forth, thereby reliably preventing the adhesion between the anterior capsule and the posterior capsule of the lens capsule and the adhesion between the lens capsule and the intraocular lens.

  Moreover, it is preferable that the said lens support part is formed so that the thickness of the said protrusion part is 1.0 mm or less, and the space | interval of the said adjacent protrusion part is 0.2 mm or more. In particular, it is preferable that the protrusions have a thickness of 0.1 mm to 0.5 mm and an interval between adjacent protrusions is 0.3 mm to 0.9 mm. According to this, since the contact area between the equator portion and the protruding portion of the lens capsule is reduced, the anterior aqueous humor can contact the equator portion of the lens capsule in a wide range. In addition, when an intraocular lens is inserted into the eye with an injector, it can be easily folded small in the injector, and the incision for inserting the folded intraocular lens can be made smaller.

  According to the present invention, the anterior aqueous humor flows between adjacent protrusions and contacts the anterior capsular equator, the central equator and the posterior capsule equator of the capsular bag in order, thereby It is possible to wash away chemical mediators such as cytokines secreted from lens epithelial cells remaining in the cells and promoting proliferation of lens epithelial cells. For this reason, it is possible to suppress the growth of lens epithelial cells in the equator portion of the lens capsule and to suppress the occurrence of secondary cataract caused by the proliferation of lens epithelial cells.

  In addition, the anterior aqueous humor can quickly flow out to the posterior capsule side after flowing between the adjacent protrusions. For this reason, it becomes easy for the aqueous humor to flow into the space between the back surface of the intraocular lens that serves as a scaffold for bacterial growth and the posterior capsule, and it is possible to suppress the occurrence of postoperative bacterial endophthalmitis.

It is a top view of the intraocular lens which concerns on 1st Embodiment. It is a side view of the intraocular lens of FIG. It is a longitudinal cross-sectional view of the intraocular lens of FIG. It is an enlarged plan view of the lens support part of FIG. It is a VV sectional view taken on the line of the lens support part of FIG. FIG. 2 is an enlarged longitudinal sectional view of a lens support portion in FIG. 1. It is a top view which shows the modification of the lens support part of the intraocular lens of FIG. It is a longitudinal cross-sectional view which shows the modification of the protrusion part of the intraocular lens of FIG. It is an enlarged plan view which shows the modification of the lens support part of the intraocular lens of FIG. It is a top view of the intraocular lens which concerns on 2nd Embodiment. It is explanatory drawing which shows the flow of the anterior aqueous humor in a lens capsule.

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

  The intraocular lens 1 according to this embodiment is inserted from the incision part Op of the anterior capsule Sf into the lens capsule S from which the contents have been removed in a cataract surgery or the like. As shown in FIG. 1, the intraocular lens 1 includes an optical unit 10 made of a lens, and three lens support units 20 provided on the peripheral edge of the optical unit 10.

  As shown in FIG. 1, the optical unit 10 is formed in a convex lens shape having a circular shape in plan view, and is made of a synthetic resin material such as silicon, acrylic, hydrogel, PMMA, HEMA, or hydropolymer. The optical part 10 has a diameter of 5.0 mm to 6.5 mm, and a front and rear diameter of 0.4 mm to 0.7 mm.

  As shown in FIG. 1, the lens support portions 20 are provided at equal intervals in the circumferential direction at the peripheral portion of the optical portion 10, and have a point-symmetric arrangement configuration with respect to the center of the optical portion 10. Each of these lens support portions 20 is provided on substantially the same plane as the optical portion 10, and extends from the proximal end portion 21 connected to the peripheral portion of the optical portion 10 to the intermediate portion 22 and the distal end portion 23 around the optical portion 10. It is formed in a mode extending along the circumferential direction. The lens support 20 is made of a synthetic resin such as silicon, acrylic, PMMA, polyimide, polyvinylidene fluoride, HEMA, or polypropylene.

  The lens support portion 20 is engaged with the equator portion Se of the lens capsule S at the intermediate portion 22 and the distal end portion 23 when the intraocular lens 1 is inserted into the lens capsule S. As a result, the optical unit 10 is supported by the equator Se of the lens capsule S via the three lens support portions 20, and is in a state substantially parallel to the anterior capsule Sf and the posterior capsule Sb in the lens capsule S. In particular, in the present embodiment, the lens support portion 20 is locked to the equator Se over 75% or more of the entire circumference of the lens capsule S together with the lens support portions 20, so that the optical portion 10 is stable. As well as being supported, adhesion between the anterior capsule Sf and the posterior capsule Sb in the equator Se of the lens capsule S can be more reliably prevented, and the anterior aqueous humor F is adjacent to the lens support 20 as will be described later. It becomes possible to contact the equator portion Se of the capsular bag S in a wide range through the protruding portions 210.

  In addition, the lens support part 20 is formed so that the base end part 21 goes to the peripheral part of the optical part 10, and becomes wide. For this reason, even if the intermediate portion 22 and the distal end portion 23 of the lens support portion 20 receive a relatively large force from the equator portion Se of the lens capsule S, the proximal end portion 21 can be prevented from being bent unnecessarily.

  As shown in FIGS. 1 to 5, each lens support portion 20 includes a support portion main body 200 extending in the length direction of the lens support portion 20, and six projecting portions 210 provided on the support portion main body 200. With.

  The support body 200 is formed so as to be gently curved along the circumferential direction of the optical unit 10 around the optical unit 10. Further, as shown in FIG. 6, the support body 200 is formed in an oval shape having a cross section that is long in the radial direction of the optical unit 10.

  The protrusions 210 are provided at predetermined intervals along the length direction of the support body 200. Specifically, the protrusion 210 protrudes from the peripheral surface of the support body 200 at a right angle, and has a cross section that is long in the thickness direction (front-rear direction) of the optical unit 10.

Further, as shown in FIG. 6, when the intraocular lens 1 is inserted into the capsular bag S, the protruding portion 210 is in contact with the anterior capsular equator portion Se <b> 1 of the capsular bag S when the front side (upper side in FIG. The outer side (left side in FIG. 6) contacts the central equator part Se2 of the lens capsule S, and the rear side (lower side in FIG. 6) contacts the posterior capsule side equator part Se3 of the lens capsule S.
Moreover, between the adjacent protrusion parts 210, the recessed part 220 for the anterior aqueous humor F to flow in is formed. The concave portion 220 is a groove having a U-shaped cross section provided on the peripheral surface of the lens support portion 20. The opposite side surfaces of adjacent protrusions 210 are opposite side surfaces 221 and 222, and the peripheral surface of the support portion main body 200 is the same. The bottom surface 223 is formed as a groove extending around the peripheral surface of the lens support portion 20. Therefore, after the anterior aqueous humor F flows into the recess 220, the anterior aqueous sac F flows in the recess 220 in order while contacting the anterior capsule side equatorial part Se1, the central equator part Se2, and the posterior capsule side equator part Se3, Can be spilled into.

  Further, as shown in FIGS. 3 to 5, the protruding portion 210 is formed such that the front-rear diameter L is larger than the front-rear diameter of the optical unit 10. Specifically, the front-rear diameter L of the protrusion 210 is 0.8 mm or more, and the protrusion height of the protrusion 210 is 0.2 mm or more. Particularly preferably, the protrusion 210 has a front-rear diameter L of 1.0 mm to 2.0 mm and a protrusion height of the protrusion 210 of 0.3 mm to 0.8 mm. According to this, the protrusion 210 sufficiently opens the equator part Se of the lens capsule S forward and backward to prevent the adhesion between the anterior capsule Sf and the posterior capsule Sb of the lens capsule S and the adhesion between the lens capsule S and the intraocular lens 1. be able to. In the present specification, the front-rear diameter of the protrusion 210 refers to the length from the front end to the rear end of the protrusion 210.

  In addition, the protrusion 210 has a thickness of 1.0 mm or less, and an interval between adjacent protrusions 210 is 0.2 mm or more. Particularly preferably, the thickness of the protrusions 210 is 0.1 mm to 0.5 mm, and the interval between the adjacent protrusions 210 is 0.3 mm to 0.9 mm. According to this, since the contact area between the anterior capsule side equator portion Se1 of the lens capsule S and the protruding portion 210 becomes small, the anterior aqueous humor F can contact the equator portion Se of the lens capsule S in a wide range. In addition, when the intraocular lens 1 is inserted into the eye with an injector, the intraocular lens 1 can be easily folded small and the incision wound into which the folded intraocular lens 1 is inserted can be made smaller.

  Next, the mechanism of suppression of post cataract and postoperative bacterial endophthalmitis using the intraocular lens 1 will be described.

  After the cataract surgery inserted into the capsular bag S in which the intraocular lens 1 of the present invention is inserted, as shown in FIG. 11A, first, the anterior aqueous humor F secreted from the ciliary body C is the capsular bag S. And between the iris I and the inside of the anterior capsule Sf of the lens capsule S. The anterior aqueous humor F partially flows on the upper side of the iris I, while a part flows into the lens capsule S from the incision Op of the anterior capsule Sf of the lens capsule S and then radially outward of the optical unit 10. Flowing into.

  Thus, the anterior aqueous humor F flows into the recesses 220 between the protrusions 210 and sequentially flows through the recesses 220 while contacting the anterior capsule side equator part Se1, the central equator part Se2 and the posterior capsule side equator part Se3. . Therefore, chemical mediators such as cytokines secreted from the lens epithelial cells remaining in the equator Se of the lens capsule S and promoting the proliferation of the lens epithelial cells can be washed away. For this reason, it is possible to suppress the proliferation of lens epithelial cells in the equator Se of the lens capsule S, and to suppress the occurrence of secondary cataract caused by the proliferation of lens epithelial cells.

  Further, the anterior aqueous humor F flows through the recesses 220 between the adjacent protrusions 210 and then immediately flows out to the posterior capsule Sb side. For this reason, the anterior aqueous humor F easily flows into the space V between the back surface of the optical part 10 of the intraocular lens 1 and the posterior capsule Sb, which is a scaffold for bacterial growth, and bacteria are brought into the space V during the operation. However, since the immune system such as macrophages contained in the inflowing anterior aqueous humor F kills bacteria, it is possible to prevent the occurrence of postoperative bacterial endophthalmitis.

  A part of the anterior aqueous humor F that flows out to the posterior capsule Sb flows back into the concave portion 220 of the lens support portion 20 and then flows out of the lens capsule S and flows above the iris I. Circulates in the capsular bag S.

  In this embodiment, the lens support portion 20 is integrally formed continuously in the length direction. However, as shown in FIG. 7, it may be divided so as to be detachable in the length direction. According to this, the length of the lens support portion 20 is changed before the operation in accordance with the size of the lens capsule S predicted by the measurement by the ultrasonic biomicroscope (UBM) or the optical coherence tomography (OCT) before the operation. Therefore, the intraocular lens 1 can be locked in the lens capsule S more stably.

  Further, as shown in FIG. 8A, the lens support portion 20 may be provided with fine irregularities on the front end side or the outer peripheral end portion 211 of the protruding portion 210. Moreover, as shown to FIG. 8B, a fine unevenness | corrugation may be provided over the perimeter of the peripheral edge part 211 of the protrusion part 210. FIG. According to this, since a space is formed between the equator portion Se of the lens capsule S and the peripheral end portion 211 of the protrusion 210, the anterior aqueous humor F easily flows into the equator portion Se of the lens capsule S.

  Further, as shown in FIG. 9A, the lens support portion 20 may be provided with a second recess 250 extending in the length direction of the lens support portion 20 on the front side of the base end portion 21. According to this, when the anterior aqueous humor F contacts the anterior capsule Sf of the lens capsule S, it is secreted from the lens epithelial cells remaining in the anterior capsule Sf of the lens capsule S, and chemistry such as cytokines that promote the proliferation of the lens epithelial cells. The transmitter can be washed away.

  Further, as shown in FIG. 9B, the lens support portion 20 may be provided with a second recess 260 extending in the circumferential direction of the lens support portion 20 on the front side, the outer side, and the rear side of the base end portion 21. According to this, the anterior aqueous humor F contacts the anterior capsule Sf and equator Se of the lens capsule S in the vicinity of the proximal end portion 21, thereby causing the anterior capsule Sf and equator Se of the lens capsule S in the vicinity of the proximal end portion 21. Chemical mediators such as cytokines that are secreted from the remaining lens epithelial cells and promote proliferation of the lens epithelial cells can be washed away.

  The lens support portion 20 may be formed such that the front-rear diameter of the base end portion 21 is larger than the front-rear diameter of the optical unit 10. According to this, the base end portion 21 of the lens support portion 20 sufficiently opens the equator portion Se of the lens capsule S forward and backward, and the adhesion between the anterior capsule Sf and the posterior capsule Sb and the adhesion between the intraocular lens 1 and the lens capsule S. Can be prevented. For this reason, the anterior aqueous humor F passes between the adjacent protrusions 210 of the lens support portion 20 and comes into contact with the equator portion Se of the capsular sac in a wider range, thereby effectively suppressing secondary cataract. Is possible. In addition, the anterior aqueous humor F easily flows into the space V between the back surface of the intraocular lens 1 and the posterior capsule Sb, and can more effectively suppress the occurrence of postoperative bacterial endophthalmitis. Become.

  Moreover, although the protrusion part 210 shall be formed cyclically | annularly, if it contacts the front capsule side equator part Se1, central equator part Se2, and posterior capsule side equator part Se3 of the lens capsule S, it will be in other shapes It may be formed.

  Further, the lens support unit 20 may be capable of adjusting the focus by moving the optical unit 10 back and forth. Specifically, the lens support portion 20 is connected in a state where the base end portion 21 is movable to the peripheral portion of the optical portion 10, and the intermediate portion 22 is locked to the equator portion Se of the crystalline lens capsule S, so that the crystalline lens The optical part 10 connected to the base end part 21 moves in the front-rear direction when the intermediate part 22 of the lens support part 20 moves in the approaching / separating direction according to the degree of spreading outward in the radial direction of the equator part Se of the sac S. You may do.

<Second Embodiment>
Next, a second embodiment of the intraocular lens according to the present invention will be described with reference to FIG. In the following, only the configuration different from the above embodiment will be described, and the description of the same configuration will be omitted and the same reference numeral will be given.

  In the intraocular lens 2 of the present embodiment, as shown in FIG. 10, the lens support portion 20 is formed in a ring shape in which adjacent lens support portions 20 are connected to each other in the circumferential direction. According to this, since the lens support portion 20 is locked over the entire circumference of the equator portion Se of the lens capsule S, the equator portion Se of the lens capsule S is reliably expanded over the entire periphery, and the anterior capsule The adhesion between Sf and posterior capsule Sb and the adhesion between intraocular lens 2 and lens capsule S can be prevented, and anterior aqueous humor F can be reliably contacted by anterior capsule Sf, equator portion Se of lens capsule S and posterior capsule Sb, It becomes possible to suppress the occurrence of secondary cataract and bacterial endophthalmitis more effectively.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

DESCRIPTION OF SYMBOLS 1 ... Intraocular lens 10 ... Optical part 20 ... Lens support part 21 ... Base end part 22 ... Intermediate | middle part 23 ... End part 200 ... Support part main body 210 ... Protrusion part 211 ... Peripheral end part 220 ... Concave part 250, 260 ... 2nd Recess F ... Anterior aqueous humor Sf ... Anterior capsule Sb ... Posterior capsule
Se ... Equatorial part Se1 ... Anterior capsule side equator part Se2 ... Central equator part Se3 ... Back capsule side equator part Op ... Incision part L of the anterior capsule V ... Front and back diameter V of the intraocular lens Between the back surface of the intraocular lens and the back capsule space

Claims (11)

An intraocular lens that is inserted into the lens capsule from which the contents have been removed in cataract surgery, etc.
An optical unit composed of a lens, and a plurality of lens support units provided at the periphery of the optical unit,
The lens support part is provided in a mode extending along the circumferential direction of the optical part from the peripheral part of the optical part, and at least the intermediate part is locked to the equator part of the crystalline lens capsule,
At least the front portion to be engaged in the equatorial region of the capsular bag, the outer and rear protrusions aspect extending in a radial direction of the optical unit is provided with a plurality along the length of the lens supporting portion, the projecting portion The thickness of 0.1 mm to 1.0 mm, the interval between adjacent protrusions is 0.2 mm to 0.9 mm, and the aqueous humor flows between the adjacent protrusions. Intraocular lens.   The intraocular lens according to claim 1, wherein the lens support portion is formed such that a front-rear diameter of the protrusion is larger than a front-rear diameter of the optical portion.   The intraocular lens according to claim 1, wherein the lens support portion is formed such that a front-rear diameter of a base end portion is larger than a front-rear diameter of an optical portion.   The intraocular lens according to any one of claims 1 to 3, wherein the lens support part is locked to the equator part over 75% or more of the entire circumference of the lens capsule by combining the lens support parts. .   The intraocular lens according to any one of claims 1 to 4, wherein the lens support portion is formed in a ring shape in which adjacent lens support portions are connected to each other in the circumferential direction.   6. The lens support portion according to claim 1, wherein a concave portion extending in the length direction of the lens support portion is provided on the front side of the base end portion, and anterior aqueous humor flows into the concave portion. The intraocular lens described in 1.   The lens support portion is provided with a concave portion extending in the circumferential direction of the lens support portion on the front side, the outer side, and the rear side of the base end portion, and an aqueous humor flows into the concave portion. The intraocular lens described in any of the above.   The intraocular lens according to any one of claims 1 to 7, wherein the lens support portion is divided so as to be detachable in a length direction.   The intraocular lens according to any one of claims 1 to 8, wherein the lens support portion is provided with irregularities on at least a front end and / or an outer peripheral end portion of the protrusion.   10. The lens support portion according to claim 1, wherein a front-rear diameter of the protruding portion is 0.8 mm or more and a protruding height of the protruding portion is 0.2 mm or more. Intraocular lens.   11. The intraocular device according to claim 10, wherein the lens support portion is formed such that the protrusion has a front-rear diameter of 1.0 mm to 2.0 mm and a protrusion height of the protrusion is 0.3 mm to 0.8 mm. lens.