Intraocular lens with a haptics element having a specific three-dimensional curvature

Abstract

The present invention relates to an intraocular lens (1) having a single optical portion (2), a loop element (5) connected to the optical portion (2), and a principal optical axis (A) passing through the front side (3) and the rear side (4) of the optical portion (2). The loop element (5) has a first loop portion and at least one second loop portion, the first loop portion being in the form of a first ring (6) and extending around the optical portion (2), the at least one second loop portion being in the form of a second ring (11) and extending around the optical portion (2), and being elastically movable relative to the first loop portion. At least one of the two rings (6, 11) is not flat in the circumferential direction around the principal optical axis (A), and at least one of the two rings (6, 11) has exactly two ring valleys (8, 17, 12, 13) and exactly two ring peaks (9, 10, 14, 15).

Description

Technical Field

[0001] One aspect of the invention relates to an intraocular lens comprising a single optical portion and including a loop connected to the optical portion, and having a principal optical axis passing through the front and rear sides of the optical portion. The loop includes a first loop portion and at least one second loop portion, the first loop portion being in the form of a first ring and surrounding the optical portion, and the at least one second loop portion being in the form of a second ring and surrounding the optical portion and resiliently movable relative to the first loop portion. At least one of the two rings has a non-flat shape in the circumferential direction around the principal optical axis. Background Technology

[0002] Intraocular lenses are known in various embodiments. Typically, an intraocular lens has at least two separate loops formed opposite to each other in a circumferential direction around the principal optical axis and formed as radially adjacent optical portions. More than two such separate loops can also be formed, such as three loops.

[0003] Artificial lenses can be implanted in different defined locations within the eye to replace the eye's natural lens. Therefore, in this context, it is conceivable to implant a specific artificial lens into the anterior chamber of the eye. For example, such an anterior chamber lens could be fixed at the anterior iridocorneal angle.

[0004] There are also known intraocular lenses called iris clip-on lenses. These lenses are fixed to the pupil. Specifically, the lens is clipped onto the pupillary opening. For example, such a lens is known from DE 10 2007 057 122 A1. The lens having this particular implantation site in the eye has two opposing loops. Each of these loops has two L-shaped arms. Viewed in a plane perpendicular to the principal optical axis of the lens, the mutually facing ends of these arms are arranged to face each other, but are arranged to be non-contacting and non-overlapping. The gap formed between the ends of the arms in the circumferential direction around the principal optical axis by these loops can be used to clip onto the iris. However, this lens is not intended for and is not suitable for implantation in the eye capsule.

[0005] In this regard, it is further known that there are specific intraocular lenses, which can be called posterior chamber lenses, and are implanted in the eye capsule.

[0006] DE 103 10 961 B4 discloses an intraocular lens for a posterior chamber type. In this posterior chamber type lens, two separate loops are formed to radially abut the optical portion in opposite regions of the optical portion. Each of the two corresponding loops is formed to have two loop portions. The two loop portions of the loop are movable relative to each other. For this purpose, at the defined connection point between the loop portions connected to each other in a one-piece form, the defined kink point is formed, for example, in the form of an integral hinge. In this way, the radially outer loop portion of this loop can be folded or pivoted relative to the first loop portion directly abutting the optical portion. This pivoting movement is performed only in a plane perpendicular to the optical axis. This aims to reduce the radial width of the entire intraocular lens so as to avoid stimulation within the capsular bag caused by these loops.

[0007] This type of posterior chamber lens has a generally planar structure. As a result, the capsular bag, which contracts after implantation, comes into contact with the posterior aspect of the optic. Cell migration may occur in the contact area, and therefore the posterior capsular bag may become cloudy. It is known that this clouding of the posterior capsular bag can be avoided, or at least reduced, if the posterior aspect of the optic of the intraocular lens is flushed with aqueous humor. This requires a certain distance between the posterior aspect of the optic of the intraocular lens and the posterior capsular bag.

[0008] In DE 103 10 961 B4, it is impossible to maintain the distance between the posterior aspect of the intraocular lens and the capsular bag when the intraocular lens is implanted within the capsular bag. Therefore, this type of posterior chamber lens does not solve the aforementioned problem.

[0009] US 2007 / 0100444 A1 discloses an intraocular lens having a three-dimensionally formed loop in the form of a woven fabric. The loop has a plurality of arched portions that are radially arched relative to the principal optical axis. These arched portions are arranged at different positions along the principal optical axis of the intraocular lens through their two ends. One end of the arched portion is arranged in a contemplated manner on the circumferential side of the optical portion of the intraocular lens. A second end of the arched portion is secured so as to protrude beyond the optical portion in an axially forward direction and is secured to an annulus of the loop. The annulus is arranged entirely in a flat plane, which is arranged at a distance from the optical portion and oriented perpendicular to the optical axis of the lens.

[0010] US 8,043,372 B2 discloses an intraocular lens that also has a three-dimensionally formed loop whose shape does not extend in a plane. In one exemplary embodiment, this loop has two loops surrounding a principal optical axis. Each of these loops is wavy in a meandering manner. The meandering shape with a plurality of loops is designed to surround the principal optical axis. The two loops are connected to each other at the inflection points of the waves, wherein the radially closer inner ring peaks protrude freely and face each other or face the principal optical axis.

[0011] These three-dimensional loops are designed to improve the firm retention of intraocular lenses (IOLs) within the capsular bag. However, these loops have a very complex form and are therefore difficult to manufacture. This complexity also makes implantation of the IOL into the capsular bag more challenging. Furthermore, these loops present the following problem: within the capsular bag, the loops will experience significant radial compression in certain areas due to their symmetry about the principal optical axis. Summary of the Invention

[0012] The purpose of this invention is to develop an artificial lens that helps improve its positioning within the capsule of the eye.

[0013] According to the features of the independent claim, this objective is achieved by an artificial intraocular lens.

[0014] One aspect of the present invention relates to an intraocular lens having a single optical portion. The optical portion is a lens. The optical portion has specific optical imaging characteristics so that specific corrections of visual defects can be achieved therefrom.

[0015] Furthermore, the intraocular lens includes a loop connected to the optical portion. The intraocular lens has an optical axis or principal optical axis that passes through the front and back sides of the optical portion, particularly centrally through the front and back sides of the optical portion in the intermediate region. The loop has a first loop portion in the form of a first ring. The first ring surrounds the optical portion. The loop has at least one second loop portion in the form of a second ring. The second ring surrounds the optical portion. Both loop portions are elastically movable. When considered around the principal optical axis, at least one of the two rings has a non-flat shape in the circumferential direction. This means that when viewed along its longitudinal axis, and therefore when considered along its ring shape, the ring is not formed in a plane, but has a non-flat profile in this respect. At least one of the two rings has exactly two ring valleys and exactly two ring peaks. This embodiment results in a relatively simple geometry for this at least one loop portion. From a manufacturing point of view, this is advantageous. Furthermore, this embodiment improves the placement of the intraocular lens within the capsular bag. Specifically, this can at least reduce both undesirable rotation of the intraocular lens (IOL) within the capsular bag and undesirable tilting of the optic section. This can help improve the fixation of the IOL's position within the capsular bag. The height specification regarding exactly two troughs and exactly two peaks is considered relative to the central plane of the optic section. This central plane is oriented perpendicular to the principal optical axis and, in particular, extends centrally through the optic section. The troughs are arranged closer to this central plane than the peaks.

[0016] Furthermore, this embodiment also enables the intraocular lens to be more securely positioned within the capsular bag in the axial direction and thus in the direction of the principal optical axis.

[0017] In an advantageous embodiment, the at least one ring having exactly two troughs and exactly two peaks is provided to have a saddle-shaped edge ring or boundary. This means that, starting from the saddle shape, the ring can be said to represent, in this respect, the boundary or edge of such a saddle shape. Therefore, this ring can also be referred to as a saddle-shaped edge ring. The specification also specifies a configuration having two troughs and exactly two peaks.

[0018] The shape of this ring, with exactly two troughs and exactly two peaks, can also be understood as the effect of a ring formed in a plane bending around an axis perpendicular to the principal optical axis, thus producing the three-dimensional shape of the ring. This axis around which the ring bends specifically extends in the central plane of the optical section.

[0019] The aforementioned advantages can be well taken into account by the specific shape of at least one ring having exactly two ring valleys and exactly two ring peaks. First, this contributes to a very simple structure, and second, it still facilitates targeted and selective connection with optical components. This contributes to the ring's large, personalized deformability, especially in the region of the ring peaks, while simultaneously establishing a sufficient mechanical connection with optical components.

[0020] Specifically, the at least one ring is provided to merge with the optical portion with exactly two of its troughs, and its trough peaks are arranged so as not to contact the optical portion. In particular, the ring merges with the optical portion at two different locations along the circumferential side with exactly two troughs. Due to this configuration, only two direct mechanical connection points are formed between the ring and the optical portion, specifically through two opposing troughs. As a result, a symmetrical mechanical embodiment of connection is established between the ring and the optical portion. Consequently, undesirable asymmetrical connections with the optical portion can be avoided. Since only two mechanical connection points are provided between the ring and the optical portion, the manufacturing of the intraocular lens can be simplified. At the same time, this also reduces the overall complexity of the intraocular lens's form.

[0021] The intraocular lens can be provided in a monolithic embodiment. However, it is also possible for the loop and the optical portion to be separate components. In particular, in this case, the loop can be mechanically connected to the optical portion. For example, a clamping connection, insertion connection, or snap-fit ​​connection can be formed between the edge region of the optical portion and the loop. For example, the loop can have a recess on its inner side, particularly in the annular valley, in which the edge region of the optical portion engages and is held. However, a connection by adhesive bonding can also be provided.

[0022] In an advantageous embodiment, the annular valleys are arranged at a first radius relative to the principal optical axis in the projected view, and the annular peaks are arranged at a second radius, which is relatively larger than the first radius, in this projected view. Therefore, in this projected view, the annulus is not formed circularly at its ends in the projection plane, but is deformed in this respect. In this case, the annular valleys are positioned more inwardly than the annular peaks. Thus, the annular peaks are radially further away from the principal optical axis than the annular valleys. This is particularly beneficial for observation in the projection plane. This improves the elastic mobility of the annulus, especially at the annular peaks. Therefore, a more personalized fit with the capsule embodiment is possible, and thus finer adjustment and more precise positioning of the intraocular lens within the capsule can be achieved. This deformability and these deformable characteristics are further improved, especially by the annular peaks that project more outwardly in the radial direction, which are also implemented as freely protruding from and not in contact with the optical portion, and which, when considered in the direction of the principal optical axis, are farther from the central plane than the annular valleys. Because of this advantage, it is also possible to improve the adaptation to very different embodiments of the capsule, and thus, it can in turn help to improve the positioning of the intraocular lens in different capsules.

[0023] Preferably, the at least one ring having exactly two troughs and exactly two peaks has a first ring portion that extends from the first trough through the first peak and into a subsequent second trough. The net width of the ring portion, measured between the troughs, is at least 90% of the diameter of the optical portion. Specifically, this net width is 100% or slightly greater than 100% of the diameter. Thus, this embodiment produces a ring portion that extends across its span from the first trough to the second trough, and in this respect, is represented as a single U-shaped arch. Therefore, this U-shaped arch surrounds or encloses the optical portion in the first half-circumferential region. This is also evident in the aforementioned projection plane.

[0024] Preferably, two successive ring valleys immediately following the ring peak on opposite sides of the ring's longitudinal axis are offset by 180° in the circumferential direction around the principal optical axis. Therefore, they are on opposite sides in this azimuth direction.

[0025] Preferably, the at least one ring having exactly two troughs and exactly two peaks has a first ring portion extending from a first trough, through a first peak, and to a subsequent second trough. The curvature of the first ring portion points radially outward relative to the principal optical axis. The curvature direction of this first ring portion, denoted as a semi-ring, is thus formed corresponding to the curvature of the circumference of the optical portion, particularly along its entire length. Therefore, these curvature directions point in the same direction but differ in magnitude. In particular, the ring portion is formed as a non-flat U-shaped arch. The U-shaped opening faces the principal optical axis.

[0026] Specifically, this refers to the entire arch span between two adjacent ring valleys in this first ring section.

[0027] Preferably, when considered in the direction of the principal optical axis, the distance from the ring peak to the central plane of the optical part is greater than that from the ring valley. Specifically, the first ring has the same shape as the second ring. Specifically, the two rings are arranged symmetrically with respect to the central plane of the optical part. This means that, in particular, the ring valleys are directly adjacent to each other, and the ring peaks, in each case, are arranged at the same azimuth angle position in the circumferential direction around the principal optical axis and are spaced apart to the maximum extent. This means that the distance measured in the direction of the principal optical axis varies in the circumferential direction around the principal optical axis, and is minimum at the positions of the ring valleys and maximum at the positions of the ring peaks.

[0028] The optical portion has a central thickness. This central thickness is measured along the principal optical axis and represents the maximum thickness of the optical portion. The thickness of the optical portion is formed, as considered along the principal optical axis, between the maximum point of curvature on the anterior side and / or the maximum point of curvature on the posterior side of the optical portion and the central plane of the optical portion. In particular, this thickness is half the central thickness of the optical portion. In particular, in the unimplanted state of the intraocular lens, the distance from the annular peak to the central plane, which is therefore measured perpendicular to the central plane and therefore considered in the direction of the principal optical axis, is greater than this thickness. This is particularly advantageous because, in particular, when implanted in the eye, the upper side, especially the posterior side, of the optical portion can be positioned at a distance from the capsular wall, especially from the posterior capsular wall.

[0029] Preferably, in the circumferential direction around the principal optical axis, the two loops are arranged at the same azimuth angle with their two troughs. In particular, the two loops, or the first and second loops, are arranged at the same azimuth angle with their two peaks in the circumferential direction around the principal optical axis.

[0030] Preferably, these rings are arranged relative to each other such that they represent, in the region of the ring peaks, an open jaw or jaw shape pointing radially outward. When considered in the radial direction, this jaw has its maximum jaw opening at its outermost radial end. When considered in the circumferential direction around the principal optical axis, starting from the corresponding ring valley, the two rings increase in radius until another subsequent ring valley, and the distance between the two rings considered in the direction of the principal optical axis continuously increases until two ring peaks, and then decreases again from the ring peaks until the corresponding subsequent second ring valley.

[0031] In an advantageous embodiment, the rings are provided to be directly connected to the optical portion at the circumferential wall of the optical portion via their respective valleys, and are particularly integrally formed with the optical portion. It can be provided that adjacent valleys of two rings are arranged adjacently and without overlap at this particular azimuth angle, or formed in a manner that overlaps with each other. These rings can also be designed integrally with each other as a ring assembly.

[0032] In an advantageous embodiment, the rings may be provided in the form of a circular ring when folded into a planar state, where only a two-dimensional design is shown. They may also be in the form of an elliptical ring when considered as a two-dimensional entity in a plane.

[0033] Preferably, at least one of the two rings is formed uninterruptedly in the circumferential direction and thus in a completely closed manner. In an advantageous embodiment, it is provided that the axial distance of the ring peak from the central plane of the optical portion is greater than the distance from the central plane of the maximum arch of the optical portion, particularly the maximum central arch. As a result, the intraocular lens can also be positioned within the capsular bag such that the optical portion is arranged at a distance from the capsular bag wall. In particular, this is advantageous for the posterior side of the optical portion. This posterior side can then be arranged within the capsular bag at a distance from the posterior capsular bag wall. As a result, aqueous humor can reach between this posterior side and the posterior capsular bag. Consequently, cell migration can be avoided, and thus turbidity of the posterior capsular bag can be prevented.

[0034] Specifically, an artificial lens is a posterior chamber lens that is implanted in the capsular bag of the eye.

[0035] The intraocular lens proposed in this regard is foldable and can be symmetrically positioned within the capsular bag without axial displacement. The loop specified in this regard can be individually adapted to the spatial conditions within the capsular bag in an improved manner. As a result, undesirable changes in the position of the optic part or optical portion of the intraocular lens can be avoided. In particular, this embodiment of the loop also achieves improved rotational stability of the intraocular lens within the capsular bag.

[0036] In particular, the artificial lens is integrally formed from a polymer material.

[0037] Specifically, the intraocular lens (IOL) takes the form of an IOL implanted within a capsular bag. In this case, the IOL can also be referred to as a capsular implantable IOL. More specifically, in this case, the IOL is a posterior chamber type IOL intended for implantation within the capsular bag of the eye. This means that the IOL is intended, and especially only for implantation within the capsular bag of the eye.

[0038] Further features of the invention will be apparent from the claims, drawings, and description thereof. The features and combinations of features mentioned in the foregoing description, and those mentioned in the following description of the drawings and / or shown only in the drawings, can be used not only in the correspondingly specified combinations but also in other combinations without departing from the scope of the invention. Therefore, the invention should also be considered to include and disclose embodiments not shown and explicitly illustrated in the drawings, but which arise from and can be created from the individual combinations of features as illustrated. The disclosure should also be considered to extend to combinations of embodiments and features that do not possess all the features of the independent claims as stated in the initial wording. Furthermore, the disclosure should be considered to extend, particularly by way of the embodiments described above, to combinations of embodiments and features that go beyond or begin with the feature combinations set forth in the dependent reference to the claims.

[0039] The specific values ​​of the parameters indicated in the literature, as well as the parameter ratios or parameter values ​​relating to exemplary embodiments for defining the lens of the eye, should be considered to be included in the scope of the invention even in the context of deviations caused, for example, due to measurement errors, system failures, DIN tolerances, etc., which means that the interpretation of substantially corresponding values ​​and indications should also be understood therein. Attached Figure Description

[0040] The working examples of the invention will be described in more detail below with reference to the schematic accompanying drawings. In the drawings:

[0041] Figure 1 A perspective view of an exemplary embodiment of an intraocular lens according to the present invention is shown;

[0042] Figure 2 A perspective view showing an exemplary embodiment of the loop of an intraocular lens;

[0043] Figure 3 The plan view shows the results according to Figure 1 A schematic diagram of the intraocular lens along the direction of its principal optical axis;

[0044] Figure 4 A schematic diagram of a loop of basic two-dimensional shape is shown, wherein the loop is a circular ring;

[0045] Figure 5 It shows that according to Figure 4 The diagram shows another exemplary embodiment of the ring, which is represented as an elliptical ring of basic shape;

[0046] Figure 6a A schematic diagram illustrating an exemplary embodiment of an intraocular lens implanted in a capsular bag is shown;

[0047] Figure 6b It shows that according to Figure 6a The image shows that an intraocular lens was implanted in a ratio of... Figure 6a In the large sacs of the middle sacs; and

[0048] Figure 6c It shows that according to Figure 6a and Figure 6b The image shows an artificial lens being implanted in a larger capsule. Detailed Implementation

[0049] In the accompanying drawings, identical or functionally equivalent elements are given the same reference numerals.

[0050] Figure 1 A perspective view of an exemplary embodiment of an artificial intraocular lens 1 is shown. This intraocular lens 1 is a posterior chamber type lens for implantation in a capsular bag of the eye. Therefore, this intraocular lens can also be referred to as a capsular implantable intraocular lens. The intraocular lens 1 includes an optical portion 2. The optical portion 2 is in the form of a lens. The intraocular lens is designed to form the defining optical imaging features of the intraocular lens 1. The intraocular lens 1 has an optical axis or principal optical axis A. The optical axis or principal optical axis passes centrally through the anterior side 3 and posterior side 4 of the optical portion 2 in the middle of the optical portion 2.

[0051] The intraocular lens 1 includes a loop 5. In the exemplary embodiment shown, the loop 5 is formed by two rings 6 and 7. In the exemplary embodiment, the first ring 6 is elastically deformable at least in certain regions. The first ring 6 has a non-flat shape in the circumferential direction around the principal optical axis A. This means that the entire shape or geometry of the first ring 6 is not arranged in a single plane. Instead, the first ring 6 is formed as a three-dimensional ring. In terms of its three-dimensional shape, the first ring 6 has exactly two ring valleys 8 and 17. Furthermore, the first ring 6 has exactly two ring peaks 9 and 10. The ring valleys 8 and 17 and the ring peaks 9 and 10 should be particularly relevant to the central plane M of the optical portion 2 ( Figures 6a to 6c To observe, the central plane M of the optical portion 2 in the form of a lens extends, particularly centrally, through the optical portion 2 and is oriented perpendicular to the principal optical axis A. Therefore, when considered in the direction of the principal optical axis A, the two annular valleys 8 and 17 are shorter from the central plane M than the annular peaks 9 and 10. Specifically, in the circumferential direction, the annular valleys 8 and 17 are arranged to be offset from each other by 180° about the principal optical axis A. A corresponding embodiment is preferably applied to the annular peaks 9 and 10. The annular peaks 9 and 10 are formed along the longitudinal axis B of the first ring 6 at the same distance from the two annular valleys 8 and 17.

[0052] Specifically, the first ring 6 has a saddle-shaped edge ring. When the first ring 6 is in place in the final state of the completed intraocular lens 1, it is in the form of a circular or elliptical ring, curved around an axis located in the central plane M and oriented perpendicular to the principal optical axis A. This results in the saddle shape. It can also be provided that this end position of the first ring 6 is formed as an annular cut from the sidewall of a hollow cylinder, the cylindrical axis of which is located in the central plane M and oriented perpendicular to the principal optical axis A.

[0053] On the circumferential side, the first ring 6 is connected to the optical part 2 via its annular valleys 8 and 17. In particular, the first ring is directly connected to the optical part 2. The annular peaks 9 and 10 of the first ring 6 are arranged so as not to contact the optical part 2. Therefore, when considering the radial direction relative to the principal optical axis A, these annular peaks 9 and 10 protrude freely outward in the radial direction.

[0054] from Figure 1 The example further clarifies that, in the exemplary embodiment, loop 5 has a second ring 11. This second ring 11 also has an uninterrupted form in the circumferential direction around the principal optical axis A and has a form that completely surrounds the principal optical axis A. In particular, it is provided that this second ring 11 also has exactly two ring valleys 12 and 13 and two ring peaks 14 and 15. The second ring 11 is preferably arranged relative to the first ring 6 such that, in the circumferential direction around the principal optical axis A, the two ring valleys 8 and 12 are arranged at the same azimuth position, and the two ring valleys 17 and 13 are also arranged at the same azimuth position. In particular, the two rings 6 and 11 are formed and arranged such that the ring peaks 9 and 14 are arranged at the same azimuth position, and the ring peaks 10 and 15 are arranged at the same azimuth position.

[0055] Furthermore, the explanation given regarding the shape and arrangement of the first ring 6 relative to the optical part 2 also applies to the second ring 11.

[0056] exist Figure 2 The perspective view shows the loop 5 of the intraocular lens 1 without the optical portion 2. In this case, the loop 5, with two rings 6 and 7, is integrally formed. In this case, the dashed dividing line should only be understood as an auxiliary line specifying the corresponding geometry of the rings 6 and 7. The rings 6 and 7 can also have separate embodiments.

[0057] From the plan view (which is in) Figure 3(Seen schematically in this example, and in this case, as a view of the intraocular lens 1 along the direction of the principal optical axis A), it is clear that the troughs 8 and 17 of the first ring 6 are positioned at a first radius r1 relative to the principal optical axis A. This radius r1 is smaller than radius r2. This second radius r2 represents the radial distance of the ring peaks 9 and 10 from the principal optical axis A. In the radial direction, the ring peaks 9 and 10 of the first ring 6 are therefore farther away from the principal optical axis A than the troughs 8 and 17. The same applies to the comparison between the troughs 12 and 13 of the second ring 11 and the ring peaks 14 and 15.

[0058] Specifically, it is provided that the first ring 6 has a first ring portion 6a, which extends from the first ring valley 8, through the first ring peak 9, and to the second ring valley 17. The curvature or curvature direction of this first ring portion 6a points radially outward relative to the principal optical axis A. Therefore, according to Figure 3 In the projected view, the first ring portion 6a is represented as a U-shaped arch. It extends from a circumferential point of the optical portion 2 to another circumferential point of the optical portion 2, which is offset by 180° relative to the former. The corresponding statement applies to the second ring portion 6b of the first ring 6. The two ring portions 6a and 6b together form the first ring 6. The same applies to the first ring portion 11a and the second ring portion 11b of the second ring 11.

[0059] The net width L extending along a straight line between troughs 8 and 17 and passing through the principal optical axis A is at least 90%, and particularly at least 100%, of the diameter of optical section 2. The same applies to the net width between troughs 12 and 13.

[0060] With respect to its curvature relative to the principal optical axis A, this first ring portion 6a points radially outward. The same applies to the second ring portion 6b. Corresponding statements apply to the curvature or curvature direction of ring portions 11a and 11b.

[0061] In the basic unimplanted state of the intraocular lens 1, ring peaks 9 and 14 have a distance a1, which is measured in the direction of the principal optical axis A. This distance a1 is greater than the distances that may optionally exist between ring valleys 8 and 12 and / or between ring valleys 17 and 13, as measured in the direction of the principal optical axis A. In particular, a corresponding distance a1 is also formed between ring peaks 10 and 15. When considered in the circumferential direction around the principal optical axis A, the distance between the two rings 6 and 11 varies between a minimum value or distance 0 at ring valleys 8, 12 and 17, 13 and a corresponding maximum value formed by the distance a1 between ring peaks 9, 14 and / or ring peaks 10, 15.

[0062] Furthermore, it is provided that, when considered in the direction of the principal optical axis A, the annular peaks 9 and 10 of the first ring 6 are farther from the central plane M in the optical section 2 than annular valleys 8 and 17. In particular, this distance is half the distance a1. Specifically, the corresponding statement applies to the distances of annular peaks 14 and 15 from this central plane M, especially relative to annular valleys 12 and 13.

[0063] In particular, the two rings 6 and 11 are formed symmetrically with respect to the central plane M.

[0064] Figure 4 An exemplary embodiment of the first ring 6 is shown. This ring 6 is shown in the plane of the accompanying drawings and is related to... Figure 1 In contrast to the corresponding folded-out view, it is therefore presented in a flat manner. In this folded-out flat view, the ring has a circular shape. In this respect, Figure 5 An alternative embodiment of the first ring 6 in this plane of the accompanying drawings is shown, thus the ring is shown in a folded-open state compared to the final position of the intraocular lens 1, and is therefore shown in two-dimensional representation. In this case, the basic shape of this folded-open state can be an elliptical ring in the plan view. Figure 4 and Figure 5 As shown in the basic shape of the two-dimensional folded opening of the first ring 6, the second ring 11 can also form a corresponding shape.

[0065] Figure 6a The schematic diagram illustrates the implanted state of the intraocular lens 1 within the capsular bag 16. In this configuration, the relatively small capsular bag 16 requires the ring peaks 9, 10, 14, and 15 to move significantly toward each other, and these peaks thus elastically deform in this respect. The optical portion 2 has a central thickness D. This central thickness D is measured along the principal optical axis A and represents the maximum thickness of the optical portion 2. The thickness measured along the principal optical axis A between the anterior side 3 and the central plane M represents half of this central thickness D. In particular, in the unimplanted state of the intraocular lens 1, when considered in the direction of the principal optical axis A, the distance of the ring peaks 9 and 10 from the central plane M is greater than this distance D / 2.

[0066] Specifically, when the intraocular lens 1 is implanted in the capsular bag 6, this embodiment also allows the optical portion 2 of the intraocular lens 1 to be positioned at a distance from the capsular bag wall, particularly the posterior capsular bag wall. Therefore, aqueous humor can reach between the posterior side 4 and the posterior capsular bag wall of the capsular bag 16.

[0067] Figure 6b Another exemplary embodiment of the implantation state of the intraocular lens 1 in the capsular bag 16' is shown. This capsular bag 16' differs from the capsular bag 16 in size and / or shape. Due to the elasticity and specific shape of the loop 5, it also contributes to positional fixation and / or rotational stability and / or tilt-free positioning. Figure 6c Another illustration schematically shows the implantation state of the intraocular lens 1 in the capsular bag 16'', which is different in this respect.

Claims

1. An intraocular lens (1) comprising a single optical portion (2) and a loop (5) connected to the optical portion (2), and having a principal optical axis (A) passing through a front side (3) and a rear side (4) of the optical portion (2), wherein the loop (5) comprises a first loop portion and at least one second loop portion, the first loop portion being in the form of a first ring (6) and surrounding the optical portion (2), the at least one second loop portion being in the form of a second ring (11) and surrounding the optical portion (2), and being elastically movable relative to the first loop portion, at least one of the first ring (6) and the second ring (11) having a non-flat shape in the circumferential direction around the principal optical axis (A), Its features are, At least one of the first ring (6) and the second ring (11) has exactly two ring valleys (8, 17, 12, 13) and exactly two ring peaks (9, 10, 14, 15).

2. The intraocular lens (1) as described in claim 1. Its features are, The at least one ring having exactly two circumferences (8, 17, 12, 13) and exactly two circumferences (9, 10, 14, 15) has the shape of a saddle-shaped edge ring.

3. The intraocular lens (1) as described in claim 1 or 2. Its features are, The at least one ring merges with the optical part (2) along its circumferential side with its ring valley (8, 17, 12, 13), and its ring peak (9, 10, 14, 15) is arranged so as not to contact the optical part (2).

4. The intraocular lens (1) as described in claim 1 or 2. Its features are, In the projection view of the principal optical axis (A), these troughs (8, 17, 12, 13) are arranged at a first radius (r1) relative to the principal optical axis (A), and in the projection view of the principal optical axis (A), these peaks (9, 10, 14, 15) are arranged at a second radius (r2) which is relatively larger than the first radius (r1).

5. The intraocular lens (1) as described in claim 1 or 2. Its features are, The at least one ring having exactly two troughs (8, 17, 12, 13) and exactly two peaks (9, 10, 14, 15) has a first ring portion (6a, 6b, 11a, 11b) that extends from the first trough (8, 12) through the first peak (9, 10, 14, 15) and up to the second trough (17, 13), wherein the net width (L) of the ring portion (6a, 6b, 11a, 11b) measured between these troughs (8, 17, 12, 13) is at least 90% of the diameter of the optical part (2).

6. The intraocular lens (1) as described in claim 1 or 2. Its features are, The at least one ring having exactly two troughs (8, 17, 12, 13) and exactly two peaks (9, 10, 14, 15) has a first ring portion (6a, 6b, 11a, 11b) that extends from the first trough (8, 12) through the first peak (9, 10, 14, 15) and up to the second trough (17, 13), wherein the curvature of the first ring portion (6a, 6b, 11a, 11b) is radially outward relative to the principal optical axis (A).

7. The intraocular lens (1) as described in claim 1 or 2. Its features are, When considered parallel to the principal optical axis (A), these ring peaks (9, 10, 14, 15) are farther from the central plane (M) of the optical section (2) than these ring valleys (8, 17, 12, 13).

8. The intraocular lens (1) as described in claim 1 or 2. Its features are, The first ring (6) has the same shape as the second ring (11), and these rings (6, 11) are arranged symmetrically with respect to the central plane (M) of the optical part (2).

9. The intraocular lens (1) as described in claim 8. Its features are, These rings (6, 11) are directly connected to the optical part (2) at the circumferential wall of the optical part (2) through their respective ring valleys (8, 17, 12, 13).

10. The intraocular lens (1) as described in claim 9. Its features are, These rings (6, 11) are integrally formed with the optical part.

11. The intraocular lens (1) as described in claim 1 or 2. Its features are, The intraocular lens (1) is a posterior chamber lens for implantation in a capsule (16, 16', 16") of the eye.

Images