PUZZLE-LIKE INTRAOCULAR LENS

Description

Technical field

[0001] One aspect of the invention relates to an artificial intraocular lens consisting only of a disk-shaped lens body, which is designed at least in certain areas as the optics of the intraocular lens, wherein the lens body has a diameter greater than or equal to 8 mm. State of the art

[0002] Artificial lenses for the eye are known as intraocular lenses (IOLs). A wide variety of designs are possible. For example, intraocular lenses have an optical component to which at least one haptic can be attached at the periphery. This haptic allows the intraocular lens to be held in place within the eye's capsular bag. The haptic is an integral part of the intraocular lens and does not possess optical imaging properties, unlike the optical component. Such intraocular lenses have an optical component with a small diameter, typically around 6 mm or less. This allows these lenses to be implanted through a small incision in the eye. However, since the single-piece optical component is smaller in diameter compared to the eye's natural lens, this intraocular lens requires the haptic to be held in position within the capsular bag.Nevertheless, these intraocular lenses can shift positionally within the eye, which is undesirable. Due in part to their small diameter, such intraocular lenses can also cause negative or positive dysphotopsia. Furthermore, once implanted, the shrinkage of the capsular bag can promote the migration of epithelial cells to the center of the capsular bag, leading to blurred vision.

[0003] To at least reduce these disadvantages, intraocular lenses without haptic feedback are known. They therefore consist of only an optical component. Such intraocular lenses are known as WIOL-CF® (The Wichterle intraocular continuous focus lens). CHANGED SHEET

[0004] An intraocular lens without haptics is known from AU 2013373704. A very specific geometry of such an intraocular lens is shown there. Figures 6A to 6C then show examples that exhibit optics formed from several areas or layers. However, in these examples, all layers are always completely manufactured during the basic fabrication of the intraocular lens. Furthermore, the layers are practically only "laid on top of each other."

[0005] US Patent 9,877,825 B2 discloses an intraocular lens with a multi-part optical component. JP Patent 2004-147,770 A discloses an intraocular lens in which holes are centrally located in the optical component.

[0006] A multi-part, haptic-free intraocular lens is known from US 2004 / 148022 A1. Description of the invention

[0007] The object of the present invention is to create a hapticless intraocular lens with a large diameter optical part that can be implanted through small incisions in the eye.

[0008] This problem is solved by an intraocular lens according to claim 1.

[0009] One aspect of the invention relates to an intraocular lens. The intraocular lens consists solely of a disc-shaped lens body. This disc-shaped lens body is designed, at least in part, as the imaging optics of the intraocular lens. The lens body has a diameter greater than or equal to 8 mm, in particular between 8 mm and 10 mm. The lens body is composed of multiple parts. It comprises a first, prefabricated lens body part. The lens body also comprises at least a second, separate prefabricated lens body part. The at least two prefabricated lens body parts, when assembled, form the lens body. Before assembly, the first prefabricated lens body part and the at least second prefabricated lens body part are each designed as molded parts that retain their respective shapes.For this type of intraocular lens, it is now possible to provide a relatively large, disc-shaped lens body. The intraocular lens is designed without haptics. This large lens body allows for an intraocular lens that is similar in size to, or even the same size as, the natural lens of the eye. Because of this size, no haptics are needed to securely position the intraocular lens, for example, within the capsular bag of the eye, and to maintain this position. Furthermore, the specific design of the lens body, consisting of several separate, prefabricated lens components, now also makes it possible to insert such an intraocular lens through a small incision in the eye. This is achieved by allowing the individual lens components to be inserted separately through this small incision.This is made possible by designing the lens body components as molded parts that retain their individual shape. This allows each lens body component to be manufactured separately, ensuring the necessary precision. Thus, each lens body component, and indeed all lens body components, are provided in a fully formed state. This means that each component has a finished shape before being assembled with the other lens body components. Each such lens body component can then be inserted into the eye through the small incision, independently of the other components. This can be done individually with each of the separate lens body components, which together then form the lens body. The shape-retaining design of the lens body components is particularly advantageous.This also means that these lens components, considered individually, retain their shape independently after their initial fabrication, without being supported or surrounded by other lens components or other elements. Thus, each lens component exhibits a form stability that allows it to maintain its basic shape when the lens body is not assembled. As explained above, this enables the individual lens components to be inserted into the eye independently of the other lens components. Furthermore, this insertion process also ensures that the basic shape of the lens component is maintained.This means that the material of the lens body, which is inherently elastic and deformable, can be elastically deformed when inserted through the small incision in the eye. However, once in the eye, this lens body component retains its original shape, or rather, its shape remains unchanged. Thus, insertion into the eye does not plastically alter the fundamental manufacturing form of the lens body component. Furthermore, this design of such separate, prefabricated lens body components offers the advantage of very precise assembly of the lens body. This means that the lens body components can fit together particularly tightly, thus forming a highly advantageous lens body. This, in turn, has benefits regarding the optical imaging properties and the overall mechanical stability of the entire lens body.The prefabricated lens body components make it particularly advantageous to assemble them into the complete lens body within the eye itself. This means that, during implantation of the intraocular lens, the actual assembly of the lens body takes place within the eye. The lens body components are inserted sequentially during implantation, and the assembly of these individual components into the complete lens body then occurs within the eye. The pre-molded components also provide a more readily identifiable assembly pattern or plan for the surgeon. Even in their disassembled state, the components can be recognized in their basic form. This allows the surgeon to see where and how each lens body component can be assembled with other lens body components.The lens body parts are not rigid or shape-retaining.

[0010] The lens body, or optical component, of an artificial eye lens is typically made of a plastic material, such as a polymer. This optical component, due to its shape, exhibits specific optical imaging properties. These properties can be refractive and / or diffractive. Typically, specific optical structures are incorporated or arranged within the optical component. This allows the optical component to specifically direct the light entering the artificial eye lens from the surrounding environment.

[0011] The lens body has at least one through-hole extending from a front face to a rear face. This through-hole is thus continuous along the entire distance between the front and rear faces. In particular, such a through-hole is formed in a peripheral ring of the lens body. The peripheral ring can be a radially outer ring region of the disk-shaped lens body. It encloses the lens body radially outwards. In one embodiment, the peripheral ring may have no optical imaging properties. However, in another embodiment, it may contribute, at least partially, to the optical imaging properties of the lens body. In one embodiment, the aforementioned at least one through-hole provides a flushing through-hole.This means that it is designed to allow aqueous humor to pass through it when the intraocular lens is implanted in the capsular bag. Such a through-hole is advantageous because it can reduce or prevent the formation of posterior capsule opacification (PCO). Preferably, the lens body has a through-hole to which a cannula can be connected to drain a viscoelastic substance (OVD) between an implanted intraocular lens and the posterior wall of the capsular bag into which the intraocular lens is implanted. Such a through-hole can be located in the peripheral ring or elsewhere on the lens body. Furthermore, in one embodiment, several separate through-holes of this kind can be formed in the lens body.

[0012] In one embodiment, the intraocular lens comprises only this single lens body. This lens body is composed of several lens body parts. The lens body is designed to be free of cavities, particularly at the interfaces of the lens body parts; this applies to all interfaces of all lens body parts.

[0013] The lens body, when assembled, has a front and a back surface. The principal optical axis intersects the front and back surfaces centrally. The entire lens body is bounded at the front and rear by these surfaces. The front and back surfaces also define, at least partially, the geometry of the lens body. The front surface can be planar, convex, or concave. In one embodiment, the back surface can be planar, convex, or concave. Therefore, the lens body can be biconvex, biconcave, concave-convex, convex-concave, planar-concave, concave-planar, convex-planar, or planar-convex.

[0014] In one embodiment, a diffractive surface profile and / or a toric surface profile can be additionally applied to the front or back side shaped accordingly.

[0015] In this respect, it also applies that the base surface of the front is convex or concave and / or the base surface of the back is convex or concave.

[0016] In one embodiment, the lens body parts are shaped complementarily at the areas intended for connection with the other lens body part. This also means that, in the assembled state, the lens body parts fit together perfectly in these designated contact areas. The separate lens body parts thus enable the assembled lens body to be formed without cavities at these points. This also offers particular advantages for the stability of the lens body and for its optical imaging properties.

[0017] In one embodiment, the at least two lens body parts each have at least one toothed element. These toothed elements are designed to mesh precisely with one another, so that the lens body parts are toothed together when assembled. This creates a localized toothing device. Thus, in this embodiment, the lens body parts do not merely rest against each other at their contact points. Rather, a mechanical coupling structure is created that holds the lens body parts particularly stably in relation to one another. These toothed elements enable a coupling by which the lens body parts are essentially guided into one another. One toothed element is thus, in effect, inserted into the other toothed element. Consequently, one lens body part is also partially inserted into the other lens body part.

[0018] A toothed element can have a variety of designs. Preferably, one toothed element is a local projection on one lens body, and the other toothed element is a local recess on the other lens body part. Both toothed elements are designed to engage positively across their entire surface. This enables a particularly precise and mechanically stable connection between these lens body parts.

[0019] In one embodiment, a toothed element is thus an element that projects outwards locally beyond a boundary wall of the lens body. The complementary toothed element of the other lens body part can be a corresponding recess or groove that extends inwards from a boundary wall of this other lens body part. These locally formed toothed elements enable a particularly stable mechanical connection between the lens body parts. This allows for a particularly advantageous local interlocking of the lens body parts.

[0020] In one embodiment, this gearing device with the gearing elements can achieve an interlocking and / or anchoring of the lens body parts together.

[0021] A toothed element designed as a projection can, for example, be shaped like a point, such as a pyramidal prong, a triangular prong, or the like. It is also possible for such a projection forming a toothed element to be spherical. A mushroom-shaped embodiment of such a toothed element is also possible. In particular, the other toothed element of the other lens body part, which is designed to couple with this toothed element, is in each case designed in the complementary shape.

[0022] A toothed mechanism, as described in various embodiments above, can also improve the positional stability of the lens body components relative to one another. Improved positional fixation of the lens body components relative to each other can be achieved in at least one, and in particular in at least two, spatial directions.

[0023] In one embodiment, the toothed elements, when toothed, form a retaining structure between the lens body parts. The advantages achievable with this have already been explained above.

[0024] In a particularly advantageous embodiment, the lens body is constructed as a puzzle-like whole from the lens body components. This puzzle-like whole is formed especially when the lens body components have interlocking elements. In particular, the lens body is constructed as a 3D puzzle-like whole. The aforementioned advantages are thus achieved to a significant degree. The interlocking elements and the individually prefabricated shape of the lens body components, which also retains its shape, make the assembly of the lens body components in the eye simple and safe for the surgeon. Because of the individual shaping and the corresponding recognition, the surgeon knows which lens body component must be positioned where during assembly.

[0025] In this context, it is also possible that the corresponding lens body components and their shapes are known and can be displayed to the surgeon, for example, in an operating microscope. This can assist the surgeon during the assembly of the intraocular lens in the eye. In this regard, a corresponding structural diagram of the lens body can be displayed optically in the microscope, and / or the individual steps can be shown, indicating which lens body component must be positioned next and where on another lens body component.

[0026] In one embodiment, the lens body parts are arranged in a row along the optical principal axis of the intraocular lens, and the toothing elements are interlocked along this optical principal axis. Alternatively, or in addition, the lens body parts can be arranged in a row perpendicular to the optical principal axis, and the toothing elements can be interlocked along this axis. This allows for a wide variety of arrangements of the shape-retaining, prefabricated lens body parts for the assembly of the overall lens body.This allows for a high degree of flexibility and variability in terms of both shape and optical imaging properties, by using and installing lens body parts that are specific in terms of position, size, material, and / or optical imaging properties.

[0027] This also enables a particularly advantageous modular system for this specific type of intraocular lens. The individual lens components can then be prefabricated precisely according to requirements and retain their shape accordingly. This allows for the precise placement of a lens component within the lens body. Consequently, specific refractive errors can be compensated for particularly effectively, even locally throughout the entire lens body, using such individually designed lens components. Since the lens components are already prefabricated, only assembly into a complete lens body is required. Therefore, complex additional manufacturing processes, such as those required for non-prefabricated lens components, are unnecessary.This leads to significantly simpler processes when assembling the lens body and, as already mentioned above, also enables a simple, faster and yet safe assembly of the lens body from the lens body parts in the eye itself.

[0028] Preferably, the lens body components are dimensioned such that they can be inserted through a small incision in the eye, which has a length of less than or equal to 3 mm, in particular less than or equal to 2.5 mm, and in particular less than or equal to 2.0 mm. This allows such specific, haptic-free intraocular lenses to now be inserted through very small incisions in the eye.

[0029] In one embodiment, the lens body, when assembled, is free of cavities at the interfaces between the lens body parts. This applies in particular to all interface areas of the lens body parts.

[0030] This provides a solid lens body with respect to the interfaces between the lens body parts.

[0031] In one embodiment, the lens body parts can be held together by magnetic force and / or adhesive to assemble the lens body. This can be provided in addition to the mechanical interlocking device described above in the exemplary embodiments. It is also possible for some lens body parts to be connected only by such an interlocking device, while other lens body parts are held together only by magnetic force and / or adhesive. This allows for different holding functions to be implemented when assembling the lens body from multiple lens body parts. This can be advantageous with regard to accessibility to some lens body parts or their assembly with other lens body parts.

[0032] In one embodiment, the lens body parts are connected to each other only by interlocking mechanisms. This eliminates the need for additional magnetic holding forces and / or adhesives. Magnetic holding forces can be achieved, for example, by small, integrated magnets in other embodiments. Magnetic coatings can also be used.

[0033] In one embodiment, the lens body components, with their pre-formed shape, are designed as pre-fabricated, shape-retaining molded parts such that they can only be connected to each other in one unique way. This effectively provides an assembly code for the lens body components, ensuring they can only be connected using a single assembly principle. Incorrect assembly of the lens body components is thus prevented. Therefore, in this embodiment, the lens body components, by virtue of their individual, pre-fabricated shape, also possess an assembly code.

[0034] In one embodiment, the lens body has a mass that is at most equal to the mass of the natural lens that the intraocular lens is intended to replace in the eye being treated. This prevents decentration or undesirable positional shifts of the intraocular lens within the eye. In particular, the lens body material has a refractive index greater than or equal to 1.43. In another embodiment, the lens body can be customized with respect to its optical imaging properties by the type, position, and / or number of lens body components. This also makes it possible to produce different types of lens bodies and thus different types of intraocular lenses, depending on the number of lens body components and / or their relative positions, and therefore their position within the entire lens body.In this context, it is also possible for at least one identical lens body component to be used for different types of lens bodies to be manufactured. This also means that the same lens body component can be used for several types of lens bodies to be produced. Thus, a lens body component can also be a standardized component that can be used in different lens bodies.

[0035] It is also possible for a lens component to have the same basic shape but vary in its material composition. This allows such a lens component to be used for different lens bodies and combined with other lens components. However, due to this material variation, each lens component can contribute to different imaging properties within a lens body. This also makes it possible to modify or correct the properties of an already implanted intraocular lens by replacing just one lens component.In particular, this concept makes it possible to correct the intraocular lens even after implantation, and potentially for an extended period of time, by replacing at least one lens component, rather than all of the lens components. This is made possible by the design of the lens components as shape-retaining elements that are essentially independent. The puzzle-like structure of the lens also allows for the relatively easy removal of individual components and their replacement with a new or different component that, in particular, has the same basic shape.

[0036] In principle, the proposed intraocular lens also has the advantage that it can be assembled from lens body components, which can be inserted individually, for example, through very small incisions in the eye, which can be less than or equal to 2.0 mm in length. In particular, the number of lens body components that make up a lens body can vary depending on specific parameters. These parameters can include, for example, the lens shape or design, the refractive power, the toricity, and the size of the capsular bag and the small incision in the eye.

[0037] Further features of the invention are evident from the claims, the figures, and the description of the figures. The features and combinations of features mentioned above in the description, as well as those subsequently mentioned in the description of the figures and / or shown in the figures alone, are not only usable in the combinations specified, but also in other combinations without departing from the scope of the invention. Thus, embodiments that are not explicitly shown and explained in the figures, but which can be derived and generated from the explained embodiments by separate combinations of features, are also to be considered as encompassed and disclosed by the invention. Embodiments and combinations of features that do not exhibit all the features of an originally formulated independent claim are also to be considered disclosed.Furthermore, embodiments and combinations of features, in particular those set out above, are to be considered disclosed which go beyond or deviate from the combinations of features set out in the cross-references of the claims.

[0038] The specific parameter values ​​and information on parameter ratios or parameter values ​​specified in the documents for defining exemplary embodiments of the eye lens are also to be considered as included within the scope of the invention, even in the context of deviations, for example due to measurement errors, system errors, DIN tolerances, etc., which also includes explanations relating to essentially corresponding values ​​and information. Brief description of the drawings

[0039] Exemplary embodiments of the invention are explained in more detail below with reference to schematic drawings. These show: Fig. 1a a top view of an embodiment of an intraocular lens according to the invention; Fig. 1b a sectional view through the intraocular lens according to the invention. Fig. 1a Fig. 2a a top view of a further embodiment of an intraocular lens according to the invention; Fig. 2b a sectional view through the intraocular lens according to Fig. 2a Fig. 3a a top view of a further embodiment of an intraocular lens according to the invention; Fig. 3b a sectional view through the intraocular lens according to Fig. 3a Fig. 4 a sectional view through an embodiment of a gearing device between two lens body parts of a lens body of an intraocular lens; Fig. 5 a sectional view through another embodiment of a gearing device between two lens body parts of a lens body of an intraocular lens; Fig. 6a a top view of an intraocular lens according to another embodiment; Fig. 6b a sectional view through the intraocular lens according to Fig. 6a Fig. 7 shows a sectional view through a partial area of ​​an embodiment of an intraocular lens according to the invention, in which at least some lens body parts are connected to each other by magnetic holding force and / or by adhesive; Fig. 8 shows a sectional view through a further embodiment of an intraocular lens according to the invention; and Fig. 9 shows a sectional view through a further embodiment of an intraocular lens according to the invention. Preferred embodiments of the invention

[0040] In the figures, identical or functionally equivalent elements are given the same reference symbols.

[0041] In Fig. 1 In one embodiment, a top view of an intraocular lens 1 is shown. This artificial lens is intended for implantation into an eye, in particular into the capsular bag of an eye. The intraocular lens 1 consists of only a lens body 2. The lens body 2 is disc-shaped. The intraocular lens 1 has only this one lens body 2. The intraocular lens 1 has no haptic features. It therefore has no device, in particular no retaining clips, by which it would be held in the capsular bag of the eye. The intraocular lens 1 is thus also a hapticless intraocular lens. The disc-shaped lens body 2 is shaped like a flat cylinder. The basic shape is defined by a front surface 3 and / or a back surface 4 of the disc-shaped lens body 2. The intraocular lens 1, and thus the disc-shaped lens body 2, has a principal optical axis A. This is in Fig. 1a It is oriented perpendicular to the plane of the figure. It penetrates, in particular, the front surface 3 and the back surface 4 in the center. In the implanted state, the back surface 4 faces the retina of the eye and the front surface 3 faces away from the retina of the eye.

[0042] The front surface 3 can be convex or concave with a base surface. It can also be flat. The back surface 4 can be convex or concave with a base surface. It can also be flat. In one embodiment, a diffractive surface profile and / or a toric surface profile can be applied to these base surfaces. The disk-shaped lens body 2 is constructed from at least two separate, prefabricated lens body parts. In the embodiment in Fig. 1a und Fig. 1b Three separate lens body parts, 5, 6, and 7, are shown here as an example. Lens body parts 5 to 7 are prefabricated molded parts. This means that each of these lens body parts 5 to 7 is manufactured individually and given its own unique shape. After its individual manufacture, each lens body part 5 to 7 is designed to retain its shape. This means that it maintains its shape independently, even without additional support, a shell, or the like. Nevertheless, each lens body part 5 to 7 is made of an elastic material, such as a suitable polymer.

[0043] Lens body parts 5 to 7 are precisely shaped so that they can be positioned adjacent to one another and precisely aligned. This forms the disc-shaped lens body 2. Fig. 1b The intraocular lens 1 is located along the intersection line Ib - Ib according to Fig. 1a The assembled state of the disc-shaped lens body 2, consisting of the individual lens body parts 5 to 7, is shown. At the contact surfaces, and thus at the interfaces between the lens body parts 5 to 7, these parts are in a form-fitting manner, particularly across the entire contact surface. As a result, the disc-shaped lens body 2 is completely free of cavities at the interfaces of the individual lens body parts 5 to 7.

[0044] In the illustrated embodiment, the lens body parts 5 to 7 are each mechanically connected to one another by local, individual toothed devices 8, 9, 10. These toothed devices 8 to 10 are designed such that the lens body parts 5 to 7 are arranged to interlock only locally. In the illustrated embodiment, the lens body part 5 has toothed elements 11 and 12 formed as projections. These engage positively with further toothed elements 13 and 14, which are formed as recesses in the other lens body parts 6 and 7.

[0045] Furthermore, in Fig. 1b As can also be seen, lens body parts 6 and 7 have further toothing elements 14 and 15, which are also designed as projections and recesses. This provides for a corresponding interlocking coupling, toothing, or anchoring. In particular, each lens body part 5 to 7 is thus mechanically coupled to the adjacent lens body part 5 to 7 by a corresponding toothing device. The toothing devices 8 to 10 can be individually designed with their toothing elements. Pyramidal prongs, triangular prongs, ball-head designs, or mushroom-shaped designs can be provided as projections. These then engage in complementary shaped recesses, which represent the other toothing elements.

[0046] Interlocking elements are, generally speaking, in particular, abrupt and local projections or recesses that protrude from or into the respective boundary surface or contact surface of a lens body part.

[0047] Furthermore, in Fig. 1b As can also be seen, a flush transition is formed on the front 3 and / or the back 4 between a corresponding surface area of ​​the adjacent lens body parts. In particular, the entire front surface is thus smooth or seamless at the transitions between lens body parts 5 to 7. The same is also implemented on the back 4 at the transition between lens body parts 6 and 7.

[0048] Furthermore, in Fig. 1b As can also be seen, the interlocking devices 8 to 10 only create a local overlap between adjacent and abutting lens body parts 5 to 7. For example, in a direction perpendicular to the optical principal axis A, such an overlap is formed at the interlocking device 8, at the interlocking device 9, and at the interlocking device 10.

[0049] In the exemplary embodiment, the intraocular lens 1 has at least one through-hole 17, here several separate through-holes 17. The through-holes 17 extend continuously from the front 3 to the back 4. These through-holes 17 are designed as drainage holes for aqueous humor to prevent posterior capsule opacification (PCO).

[0050] In one embodiment, the through-holes 17 are formed in a radially outer ring region 18, viewed from the principal optical axis A. This ring can be a specific peripheral ring and can contribute to the optical imaging properties of the disk-shaped lens body 2. In another embodiment, it is designed without optical imaging properties.

[0051] As in Fig. 1a und 1b As can be seen, the assembled disc-shaped lens body 2 is constructed as a three-dimensional, puzzle-like whole. It has a diameter d greater than or equal to 8 mm.

[0052] In Fig. 2a Figure 1 shows another embodiment of an intraocular lens 1 in a top view. Fig. 2b The sectional view along section line Ilb - Ilb is shown in this regard. Here, only the shape of the individual separate, prefabricated lens body parts 5 to 7 differs from the embodiment in [reference to embodiment]. Fig. 1a und 1b Furthermore, another lens body part 5' is present.

[0053] As can be seen here, interlocking devices 8 and 9 are also implemented. These are formed between the lens body parts 5 and 6. Between lens body part 5 and lens body part 5', a large, uneven contact surface is formed that is not merely localized and does not rise abruptly. Such a structure is not an interlocking device in the context of the invention. In this exemplary embodiment, an interlocking device is not necessary. This direct contact between lens body part 5 and lens body part 5' at this contact surface can also be achieved in an exemplary embodiment by magnetic holding force and / or by adhesive. This unevenness extends over the entire contact area between lens body parts 5 and 5'. It is therefore not a local interlocking device as understood in the context of the invention.

[0054] In principle, it is advantageous if at least one mechanical connection between a lens body part and at least one other lens body part of the disk-shaped lens body 2 is realized by at least one toothed connection. In principle, in one embodiment, any such mechanical coupling between adjacent lens body parts can be realized by at least one toothed connection. Further retaining devices, such as a magnetic holder and / or an adhesive holder, may then be unnecessary. However, in other embodiments, at least one further retaining device, which is not a toothed connection, may be provided between lens body parts.

[0055] In Fig. 3a A top view of a further embodiment of an intraocular lens according to the invention is shown. Fig. 3b The cross-sectional view along section line IIIb - IIIb is shown in this regard. Here, too, only three separate lens body parts 5 to 7 are shown, which form the lens body 2, or from which the lens body 2 consists. Therefore, the intraocular lens 1 also consists only of these three lens body parts 5 to 7.

[0056] In all embodiments, more or fewer than three separate lens body parts can be provided, from which a corresponding lens body 2 is made, and thus the intraocular lens 1 then also consists only of these several separate lens body parts.

[0057] In Fig. 4 A partial view of an embodiment of a gearing device 8 is shown in a schematic representation. Here, the gearing element 11 can have a pyramidal tooth, a triangular tooth, or another type of point. The recess 13 is then shaped accordingly.

[0058] In Fig. 5 A further embodiment of a gearing device 8 is shown. The gearing element, designed as a projection 11, can here, for example, be configured as a ball head, a mushroom shape, or another type of bead or the like. Here, too, the gearing element 13, designed as a recess, is complementarily shaped.

[0059] In Fig. 6a Figure 1 shows a top view of another embodiment of an intraocular lens 1 with a disk-shaped lens body 2. The sectional view in Figure 2 shows the lens body 1. Fig. 6b The intraocular lens 1 is shown in this respect. Here, too, three separate lens body parts 5, 6, and 7 are provided, but only as an exemplary embodiment. Again, a symmetrical structure is formed, with lens body parts 6 and 7 essentially forming hemispheres in which lens body part 5 is inserted centrally from above and from the front, respectively. Mechanical couplings between lens body parts 5 to 7 can again be realized by at least one toothed device. Additionally, other mechanical retainers can be provided at other interfaces between lens body parts 5 to 7. For example, retainers 19 can be implemented that have a magnetic holding force. Likewise, a corresponding retainer 20 can be implemented. In another embodiment, the retainers 19 and 20 can also be implemented as adhesive connections, as shown in Fig. 7 as shown in an excerpt, for example.

[0060] In Fig. 8 A further embodiment of an intraocular lens 1 with only one disk-shaped lens body 2 is shown in a sectional view. Here, too, individual mechanical mounts are implemented between several lens body parts 5, 6, 7, 21, and 22. Different or identical mounts can be provided. For example, a toothed device 8 can be implemented as one mount. This can also be implemented at the interfaces of the other lens body parts 6, 7, 21, and 22. Here, too, only a local interlocking of the lens body parts is provided.

[0061] In particular, this interlocking is relatively abrupt in all gearing devices and is therefore implemented, for example, in a stepped manner, as has been the case in the other embodiments described so far. Gear elements thus represent a relatively abrupt change in contour shape, especially as a protrusion or indentation, and thus as a projection or recess. Continuous waveforms or the like are therefore not to be understood as such local and discrete gear elements. In particular, they are not formed over an entire contact area between two lens body parts, but only locally. The remaining surface of a contact area of ​​the respective lens body part is in contact with the other surface of the other lens body part, in particular only in contact with it.

[0062] In Fig. 9In another embodiment, a cross-sectional view through an intraocular lens 1 with only one disk-shaped lens body 2 is shown. Here, several, in particular U-shaped, lens body parts are realized in cross-section as separate, prefabricated molded parts that are fitted together or stacked on top of each other with near-perfect precision. In three dimensions, these U-shaped lens body parts 5, 6, 7, and 21 are shaped like pots or troughs. Here, too, a mechanical connection or mounting can again be designed as a toothed device. Other mountings between other lens body parts can then be implemented as magnetic mounts or adhesive bonds. All mechanical couplings can also be implemented as toothed devices between the individual lens body parts 5, 6, 7, and 21.As can be seen here, in one embodiment, an abrupt step in the contour is implemented on the front surface 3. The foremost lens body part 21 has a further receiving area 23. Another lens body part can be inserted into this. This can be shaped in such a way that a continuous, and in particular uniformly contoured, front surface 3 is formed without any step at the corresponding interface.

Claims

1. Intraocular lens (1) without haptics, consisting solely of a disc-shaped lens body (2), which is designed at least in part as an optical unit of the intraocular lens (1), wherein the lens body (2) has a diameter (d) greater than or equal to 8 mm, wherein the lens body (2) is constructed in several parts and has a first prefabricated lens body part (5) and at least one separate, second prefabricated lens body part (6), which parts, in the assembled state, form the lens body (2), wherein, prior to their assembly, the first prefabricated lens body part (5) and the second prefabricated lens body part (6) are each a shaped part retaining its respective shape, wherein the flat-cylindrical lens body (2) has at least one through-hole (17) which extends from a front face (3) of the lens body (2) to a rear face (4) of the lens body (2), and the through-hole (17), in a radial direction seen from a main optical axis (A) of the intraocular lens (1), is formed in a radially outer annular region (18) of the disc-shaped lens body (2), wherein the lens body (2) is otherwise formed free of cavities, and the base surface of the front face (3) is convex or concave, and / or the base surface of the rear face (4) is convex or concave.

2. Intraocular lens (1) according to Claim 1, wherein the two lens body parts (5, 6) each have at least one interlocking element (11, 13), which interlocking elements are designed to interlock exactly with each other, so that the lens body parts (5, 6) are interlocked with each other in the assembled state.

3. Intraocular lens (1) according to Claim 2, wherein one interlocking element (11) is a local projection on one lens body part (5), and the other interlocking element (13) is a local depression on the other lens body part (6), wherein the two interlocking elements (11, 13) are designed for form-fitting contact over their respective entire surface.

4. Intraocular lens (1) according to Claim 2 or 3, wherein the interlocking elements (11, 13), in the interlocked state, hold the lens body parts (5, 6) relative to each other.

5. Intraocular lens (1) according to any one of the preceding Claims 2 to 4, wherein the lens body (2) is constructed, by the interlocking elements (11, 13), as an overall body like a jigsaw puzzle.

6. Intraocular lens (1) according to any one of the preceding claims, wherein the lens body parts (5, 6) are arranged in series with each other in the direction of a main optical axis (A) of the intraocular lens (1) and the interlocking elements (11, 13) are interlocked in the direction of the main optical axis (A) of the intraocular lens (1) and / or are interlocked in the direction perpendicular to the main optical axis (A), and / or the lens body parts (5, 6) are arranged in series with each other in the direction perpendicular to the main optical axis (A) of the intraocular lens (1) and the interlocking elements (11, 13) are interlocked in the direction perpendicular to the main optical axis (A) of the intraocular lens () and / or are interlocked in the direction of the main optical axis (A) .

7. Intraocular lens (1) according to any one of the preceding claims, wherein the through-hole (17) is a flushing through-hole for the passage of aqueous humor.

8. Intraocular lens (1) according to any one of the preceding claims, wherein the lens body parts (5, 6) are held together by magnetic holding force and / or by adhesive.

9. Intraocular lens (1) according to any one of the preceding claims, wherein a side wall of the intraocular lens (1) extends, in the cross section of the intraocular lens (1), between the front face (3) and the rear face (4) and characterizes the flat-cylindrical shape.

10. Intraocular lens (1) according to Claim 9, wherein the side wall has a different curvature to the front face (3) and to the rear face (4), and / or the side wall extends over its entire length coaxially with respect to the main optical axis (A) of the intraocular lens (1).