Ophthalmic implants and their manufacturing methods

Abstract

This invention relates to an ophthalmic implant (1) comprising an optical imaging element (2) and a tactile device (3) having a tactile root (4). The invention also relates to a corresponding method for manufacturing the ophthalmic implant and a characterization system (10) for identifying ophthalmic implants, particularly intraocular lenses. The aim is to achieve clear identification of the ophthalmic implant and a clear and secure identification feasibility scheme. The application of this identification should be able to forcefully guide, prevent confusion, and be implemented with minimal additional technical cost. This objective is thus achieved by arranging rotationally symmetric structured codes (5) of the ophthalmic implant's identification data in a region near the tactile root and / or the tactile device. This objective is also achieved by a method for manufacturing the ophthalmic implant, wherein the ophthalmic implant is obtained directly during or after the formation of the rotationally symmetric structured codes (5) of the identification data by the same method.

Description

Technical Field

[0001] This invention relates to an ophthalmic implant comprising an optical imaging element, particularly a central optical lens, and a tactile device having a tactile root connected to the optical imaging element. In particular, such an ophthalmic element is an intraocular lens (IOL). The invention also relates to a corresponding method for manufacturing the ophthalmic implant, wherein the implant is shaped by means of machining methods such as turning, particularly by means of laser forming or prototyping. Furthermore, the invention relates to characterization systems, computer program products, and computer-readable media for identifying ophthalmic implants, particularly IOLs. Background Technology

[0002] Most ophthalmic implants, especially commercially available intraocular lenses (IOLs) made of artificial materials, are identified by labels on primary and secondary packaging. Besides manufacturer information, these labels typically include details such as the type of IOL and its refractive index. Therefore, a prerequisite for correct delivery to patients is that the packaged and delivered IOL or other ophthalmic implant corresponds to the specifications on the packaging label. Users must rely on the manufacturer for this, as precise identification or examination of the lens characteristics based solely on vision in the operating room is difficult. This presents a risk of confusion and misidentification at the manufacturer's side, potentially leading to the need for external implantation of, for example, a new, correct IOL for the patient. This places a burden on the patient multiple times. Furthermore, mere guesswork can lead to confusion resulting in costly and reputational product recalls.

[0003] Therefore, a method is proposed, for example, in WO 2009 / 124838 A2, which uses IR marking to label intraocular lenses, achieved by applying fluorescent dye. Another known feasibility of specific marking is the application of laser-engraved QR codes in tactile devices according to DE 10 2009056 810A1, where the laser-engraved QR codes are generated in an additional method after the ophthalmic implant is manufactured. However, this method is technically very complex and, for example, requires additional biocompatible fluorescent dyes and complex fluorescence excitation and detection systems in the case of IR marking. Conversely, the prerequisite for marking tactile devices by means of laser-engraved QR codes is proof of the biocompatibility of the corresponding laser system and method. All methods known to date must be integrated into the manufacturing chain in such a way that the intraocular lens cannot be incorrectly labeled due to operational or programming errors. Because these processes are handled separately in additional manufacturing steps, in separate methods, and using separate equipment, the residual risk of confusion remains. Summary of the Invention

[0004] Therefore, the object of this invention is to achieve clear identification of at least the type and refractive power of ophthalmic implants, particularly intraocular lenses, and to provide clear and safe identification feasibility without the need for additional additives, biomaterials, chemicals, or new manufacturing methods. The application should be actively guided, non-confused, and have minimal additional technical costs.

[0005] The invention is defined in the independent claims, and the dependent claims relate to preferred improvements.

[0006] Ophthalmic implants include optical imaging elements with anterior and posterior edges as well as circumferential edges. The optical imaging element can and must be held at the circumferential edge (or at least in its immediate vicinity) of the optical imaging element, as all other holding positions limit the optical usability of the element. Therefore, in order to hold, stabilize, position, or center and fix it in its application position within the patient's eye, ophthalmic implants include a tactile device with a tactile root connected to the optical imaging element, particularly at least partially surrounding the optical element at its circumferential edge. Thus, a fixed connection between the optical imaging element and the tactile device is typically achieved via the tactile root. The concept of a tactile device should here be applied to every object surrounding the optical system of such ophthalmic implants.

[0007] The optical imaging element of an ophthalmic implant is typically a central optical lens. It is held in place by tactile devices attached at multiple locations, mostly around the periphery of the lens.

[0008] As mentioned above, the largest group of ophthalmic implants is the intraocular lens (IOL). IOLs (like most other ophthalmic implants) are made of biocompatible artificial materials, typically polymers or other organic materials, and where possible, glass, particularly silicate glass. Ophthalmic implants consisting of the specific group of grafts (and often referred to as implants) should not be included in this invention.

[0009] According to the present invention, structured coding of identification data (particularly type and refractive power) of ophthalmic implants is now arranged on the tactile root and / or the area near the tactile root of the tactile device.

[0010] Here, "structured coding" is understood as coding with a contour map, that is, coding that can be identified by its shape and morphology. Such "structured coding" is very advantageous in the same molding method (such as its production of ophthalmic implants), that is, in principle as "in-situ structured coding".

[0011] Identification data for ophthalmic implants includes the implant's characteristic parameters, thus representing an identifier that allows for clear identification or authentication of the implant. As mentioned above, the identifier involves the type of ophthalmic implant, particularly an intraocular lens (IOL), and all necessary information regarding its optical properties, such as (in the case of an IOL) its refractive power.

[0012] The arrangement of tactile roots or tactile devices near tactile roots allows for the safe identification of ophthalmic implants, particularly intraocular lenses, in various situations: intraocular lenses can be easily identified and recognized on the implant before implantation, but identification can also be achieved, for example, after implantation into a patient's eye, when the implant is "weitgetropft".

[0013] In a preferred design of the ophthalmic implant according to the invention, the structured encoding of the ophthalmic implant's identification data, i.e., its identification, is achieved by means of a barcode system. The barcode system allows for binary encoding with a very simple structure. Depending on the specific implementation of the barcode system, large amounts of data can be stored and retrieved again; therefore, where possible, in addition to the type of ophthalmic implant and its optical data, other data such as place of origin, production process, date, etc., can be stored in the sense of clearly traceable product identification.

[0014] To further illustrate the general idea of ​​the invention: the ophthalmic implant, i.e., the artificial lens, possesses a certain rotational symmetry. The optical imaging element, typically an optical lens arranged as centrally as possible, is then surrounded at least in a portion of its circumferential edge by a tactile device with a tactile root, wherein a structured (in a topographical sense) rotationally symmetrical arrangement is provided at the tactile root and / or in the region of the tactile device near the tactile root, the tactile device partially surrounding the optical imaging element at its circumferential edge. Here, the rotational symmetry is interrupted at the circumferential edge of the lens where there is no connection to the tactile device.

[0015] Therefore, the encoding is designed as a barcode, ideally a circular barcode, implemented along the periphery of the optical imaging element across the entire area of ​​the tactile root or in the area of ​​the tactile device close to the tactile root. Where possible, the loop is interrupted at locations where the optical imaging element, particularly the intraocular lens, is not surrounded by the tactile device. Preferably, the most important information (such as the type of ophthalmic implant) and corresponding optical properties (e.g., the refractive power of the corresponding intraocular lens) are arranged closest to the optical imaging element.

[0016] The ophthalmic implant according to the invention can be implemented particularly simply and safely when structured coding is implemented in a rotationally symmetrical manner using a circular barcode that is interrupted where there is no tactile device. Not only the shaping of the ophthalmic implant, but also the structured coding can be implemented, for example, using a turning method with the same cutting process, particularly diamond turning, but also using laser beam shaping (where either the ophthalmic implant to be shaped is rotated while guiding a laser beam along the radius of the lens, or a rotating scan of the stationary ophthalmic implant to be shaped is achieved by moving the laser beam along the radius of the lens). The resulting rotationally symmetrical barcode allows for the structured coding of the ophthalmic implant, which is arranged in a way that makes it easily readable in various situations, especially after implantation.

[0017] Preferably, the structured coding of the ophthalmic implant according to the invention is determined by a set of spatial modulation parameters of the corresponding tactile roots or structures on the tactile device used for coding.

[0018] Preferably, the ophthalmic implant according to the invention is characterized by encoding described by at least one of the following modulation parameters: groove width, groove depth, groove inclination angle, groove position, and particularly groove radial position, which is described by the radius of the groove midpoint of the corresponding groove for rotationally symmetric encoding. Here, a groove is a recess, channel, or "groove" formed using various tools in the material of the tactile root of the ophthalmic implant or a tactile device near the tactile root. For non-vertically installed grooves, the groove depth represents the maximum depth of the groove, the groove width represents the width of the groove at the upper edge, and the curvature of the groove wall can be a modulation parameter equivalent to the inclination angle of the inclined but flat groove wall.

[0019] In order to store the desired data in the encoding, at least one corresponding spatial modulation parameter must be changed. How much and which modulation parameters can be used for structured coding also depends on which optical detection method using the spatial modulation parameters can best detect them, and whether and how such detection method or corresponding characterization system is provided.

[0020] Therefore, at least one binary operation can be implemented for encoding according to the design scheme. However, higher resolution can also be achieved for spatial compression of data structures, when, for example, it is possible to detect different groove depths instead of simply involving only one certainty, i.e., the existence of grooves at a specific location (e.g., a radius defined by the midpoint of the optical imaging element).

[0021] If such compression of the data structure can be used, additional identifiers, redundant bits, checksums, or start / stop identifiers can be introduced based on the spatial parsing capabilities of the data structure.

[0022] Particularly advantageous is that, ideally, the entire ophthalmic implant according to the invention is made from a single workpiece, with at least the optical imaging element and the tactile device along with their tactile roots also made from a single workpiece. Typically, such ophthalmic implants are made, for example, from biocompatible polymeric materials, preferably by diamond turning. However, as mentioned above, any machining turning method or laser beam forming method is also feasible. Alternatively, preferably, the ophthalmic implant can also be manufactured from biocompatible polymeric materials by prototyping methods (molding, spray casting).

[0023] Here, it is highly advantageous to form a structured code in the ophthalmic implant according to the invention during or immediately after the implant molding process. Subsequently, molding and coding are completed in a single working step, without requiring a change in position during implant operation. The manufacturing data from the implant molding process can then be directly used for coding. This achieves the highest possible security for subsequent error-free identification of the ophthalmic implant.

[0024] In the method according to the invention for manufacturing ophthalmic implants, particularly intraocular lenses, the ophthalmic implant is shaped by a cutting process, especially by diamond turning, and the identification data (particularly type and refractive power) of the ophthalmic implant is rotationally symmetrically structured and encoded directly during or after the shaping of the ophthalmic implant by a cutting process for simple, safe, and clear identification of the implant (especially by diamond turning when using these methods). This eliminates the need to change machines; the ophthalmic implant remains in its position. Diamond turning is particularly suitable for this purpose in manufacturing ophthalmic implants, particularly intraocular lenses. However, other cutting processes, such as precision turning, can also be used.

[0025] Alternatively, in the method according to the invention for manufacturing ophthalmic implants, particularly intraocular lenses, the ophthalmic implant is shaped by laser ray forming. Here, the same method (i.e., laser ray forming in this case) is used during or after the shaping of the ophthalmic implant to achieve a structured code. In such a laser ray forming method, either the ophthalmic implant to be shaped is rotated while guiding a laser beam along the radius of the lens, or the ophthalmic implant to be shaped is rotated and scanned stationary, involving the movement of the laser beam along the radius of the lens. Specifically, in this case, the structured code formed by laser ray forming also includes methods for simply, safely, and clearly identifying the type and refractive power of the implant. For this purpose, it is not necessary to change the machine; the ophthalmic implant remains in its position.

[0026] Such laser beam shaping can utilize lasers to remove material by means of ablation, such as excimer lasers or IR lasers. However, it can also utilize lasers that "cut" material by means of photoblasting or remove material at a focused location, either on or within the material (e.g., femtosecond or picosecond lasers (i.e., purely pulsed lasers)). In both cases, the appropriate laser system used to perform such laser beam shaping requires a scanner that, based on a template pre-set for the desired shaping, moves the focus of the laser beam on or within the material in all three spatial directions (or, in the case of an ablation laser, at least in two spatial directions perpendicular to the optical axis or the direction of laser beam propagation).

[0027] Here, the structured encoding of identification data for ophthalmic implants is typically performed intensively near the optical imaging elements of the ophthalmic implant, on its tactile devices, particularly its tactile roots, so as not to subsequently interfere with the optical function of the ophthalmic implant. However, identification of ophthalmic implants can be achieved at multiple locations, and where possible, after they have been implanted into the patient's eye.

[0028] Therefore, according to the present invention, the structured encoding of the identification data of the ophthalmic implant (after molding or even during the molding of the ophthalmic implant) is implemented using the same method as the molding of the ophthalmic implant. This ensures that the position of the ophthalmic implant remains unchanged, which eliminates the risk of confusion or interchangeability of the ophthalmic implant, such as tampering of the ophthalmic implant, for example, between the molding method and the separate encoding method.

[0029] For intraocular lenses, which are the most important group of ophthalmic implants, this objective is preferably achieved, for example, by introducing rotationally symmetric structured coding in the region of the tactile root of the intraocular lens and thus in the nearest vicinity of the central optical lens, by means of diamond turning or other cutting turning methods available for their manufacture.

[0030] In a particularly advantageous variant of the method according to the invention, the structured encoding data for performing the identification data of the ophthalmic implant, in particular the control data (e.g., turning or laser beam forming for diamond turning or other cutting processes), is obtained from the control data for forming the ophthalmic implant and / or from the monitoring data for forming the ophthalmic implant.

[0031] Here, the control data used for shaping ophthalmic implants is data used to directly control the corresponding turning machine, such as data from CNC files. Monitoring data is feedback from the turning machine, such as feedback from the condition of diamond or other cutting tools (depending on location and time) during grinding.

[0032] Information for machine control used in so-called contour cutting (i.e., shaping of the ophthalmic implant) is fixedly stored from a data structure in the corresponding CNC file of the ophthalmic implant (preferably the corresponding refractive value and type of intraocular lens). Therefore, when applying the method according to the invention, each manufactured ophthalmic implant, particularly each corresponding intraocular lens, is forced and directly includes an identification structure for this matching topology, i.e., a corresponding structured code (e.g., type ABCD@20.0D), using a previously generated and labeled CNC file. This forced coupling eliminates confusion. Using this identification, the ophthalmic implant, i.e., particularly the intraocular lens, is clearly marked for the IOL, at least in terms of type and refractive value, starting from the molding on the turning machine. Therefore, it is possible to clearly determine and correct the data (e.g., type and refractive value of the intraocular lens) for marking the ophthalmic implant at all necessary locations during the manufacturing process, packaging process, delivery process, before or during surgery, and, where possible, after implantation into the patient's eye.

[0033] Alternatively, the control data for shaping ophthalmic implants (when using laser beam shaping) includes data for spatially controlling the laser focus (i.e., control data for the scanner of the laser system) and data for controlling the power and, where possible, the pulse duration of the laser. Monitoring data here can be, for example, feedback data from the scanner or laser, as well as data from an additional characterizing device integrated into the laser system, which allows for direct characterization of the ophthalmic implant's shaping by means of the laser system.

[0034] In particular, in another alternative method according to the invention for manufacturing ophthalmic implants, especially intraocular lenses, the ophthalmic implant is formed by means of a prototyping method, wherein a shape-given transition from the prototype to the desired shape of the ophthalmic implant is achieved, and the structured and rotationally symmetric encoding of the ophthalmic implant's identification data (especially type and refractive power) is achieved directly during the forming of the ophthalmic implant through the prototyping method, for simple, safe, and clear identification of the implant. In this case, it is not necessary to change the machine; forming and encoding are achieved in the same method. The prototype already includes the necessary structured and rotationally symmetric encoding (especially type and refractive power) of the ophthalmic implant's identification data for the shape-given transition to the implant as a negative of the structured encoding subsequently applied to the ophthalmic implant. For this purpose, the prototyping method is particularly preferred to be spray casting. However, methods using polymers in the prototype or other forming methods are also possible.

[0035] Here, preferably, the structured coding of the identification data of the ophthalmic implant is densely implemented near the optical imaging element of the ophthalmic implant in its tactile device, especially in its tactile root, so as not to interfere with the optical function of the ophthalmic implant thereafter. However, the identification of the ophthalmic implant can be achieved in multiple locations, and where possible, after it has been implanted into the patient's eye. Thus, rotationally symmetric structured coding is particularly suitable.

[0036] For the most important group of intraocular lenses as ophthalmic implants, this objective is preferably achieved by introducing rotationally symmetric structured coding in the region of the tactile root of the intraocular lens and thus in the nearest vicinity of the central optical lens, by means of a prototype method for its fabrication.

[0037] If a prototyping method for manufacturing ophthalmic implants is used without modifying the ophthalmic implants, another particular advantage is that the structured coding data used to perform the identification of the ophthalmic implants is obtained from the control data used to build the prototype for the ophthalmic implants and / or from the monitoring data used to build the prototype for the ophthalmic implants, and is stored in the prototype (as a negative) in the same way, either during or after the prototype is built, for example by means of turning or laser beam forming.

[0038] Another feasibility for manufacturing ophthalmic implants is a combination of prototyping, particularly spray casting, which produces the general shape of the ophthalmic implant using a general prototype. Subsequently, turning or laser beam forming, as described above, can be used in a highly efficient manner to transfer the desired specific (optical) properties of the ophthalmic implant into the corresponding fine shape, and rotationally symmetric structured coding describing these properties is also performed directly during the process steps.

[0039] The characterization system for identifying the aforementioned ophthalmic implants, particularly intraocular lenses, according to the present invention comprises an illumination system for illuminating structured encoding, a camera system for recording the structured encoding, which can be obtained by means of illumination detection, an image recorded by the camera system for evaluating the structured encoding, which can be obtained by means of illumination detection, and an analysis unit for decoding identification data for identifying ophthalmic implants from the image.

[0040] Here, no special implementation scheme is required for the lighting and camera systems; many conventional lighting and camera systems can be used. However, the camera and lighting systems should be coordinated to ensure that the light energy from the lighting system is detected without problems by the camera system. Subsequently, only one additional analysis unit is needed to perform image analysis on the images received by the camera system and to set up methods for decoding the images and "compiling" them into freely readable specifications for the properties of ophthalmic implants.

[0041] The advantageous characterization system according to the invention also includes a display and / or output device for displaying and / or outputting the decoded identification data of the ophthalmic implant. The display device allows the user to directly view the decoded identification data of the ophthalmic implant. The output device preferably also allows communication with other systems, enabling the transmission or transfer of identification data to other systems. This can be achieved via wired or wireless communication paths. The feasibility of storing the data on a storage medium for reuse in other systems is also included.

[0042] A particularly advantageous feature of the characterization system is that the display and / or output devices are preferably integrated with the analysis unit for...

[0043] - Further processing of ophthalmic implant identification data, and / or

[0044] - Store identification data in an external database, and / or

[0045] -Use data from external databases to correct and identify data, and / or

[0046] - Provide feedback messages to users (such as alerts, warnings, or confirmations).

[0047] Such databases could be, for example, pixel management systems, electronic patient records, or general implant databases. Finally, there are also central external implant databases for registering and tracking implants long-term or even without time constraints.

[0048] When using external databases to correct identification data, it is possible to, for example, correct the consistency between the identified ophthalmic implant and the records in the patient's file. Then, in the event of inconsistency, appropriate countermeasures (or alerts) can be taken immediately at that location, thereby preventing the incorrect ophthalmic implant from being placed in the patient's eye at different locations until surgery.

[0049] In a variant of the characterization system according to the invention, the illumination system is constructed as a gap illumination system, which represents a simple type of structured, encoded illumination and detectability.

[0050] Particularly advantageously, the characterization system according to the invention is designed in the illumination and camera systems to operate using light in the invisible spectral range. For example, it is possible to avoid blinding the patient's eyes by using illumination and camera systems operating in the near-infrared range and by using light of other invisible wavelengths. Here, it is not necessary to simultaneously illuminate and read the entire rotationally symmetric structured code: rather, it is sufficient to illuminate a small area of ​​the code such that it can be fully illuminated along the radius of the code and thus all information at each location of the tactile device (especially the tactile root) within that radius region can be detected. Therefore, this is very convenient because it is not necessary to risk searching for information at very precise locations after transplantation, but rather to simply select an accessible area to search for information.

[0051] The microscope system according to the invention, particularly the surgical microscope system, includes the aforementioned characterization system, thereby enabling the use of conventional systems for controlling or tracing ophthalmic implants, and additionally enabling the decoding of ophthalmic implant identification data. Preferably, the decoded identification data of the ophthalmic implant can be incorporated into the microscope's imaging plane or the microscope's observation optical path within such a microscope system. Therefore, by observing the surgical process, the user not only knows the conventional information but also always knows the identification data of the ophthalmic implant to be implanted.

[0052] Therefore, it is always feasible to read the data structure, for example, at a surgical microscope. Thus, the user (usually a surgeon) can examine the type and optical data of the ophthalmic implant, such as the type and refractive value of the artificial lens, at any time, whether in case of suspicion, during surgery, or in case of complaint.

[0053] Furthermore, it is advantageous that the microscope system according to the invention is also provided for evaluating images recorded by the camera system during implantation in a patient's eye to identify orientation and positional changes of the ophthalmic implant: structured coding is particularly well suited for tracing possible and undesirable positional changes of the implant, and thus has additional applications or provides additional security aspects in addition to identifying the ophthalmic implant.

[0054] Ideally, the evaluation of structured, encoded data structures and the clear display of data are achieved through a characterization system with a digital camera system. This can be coupled to a visual observation microscope, as described herein, or placed in a specialized inspection apparatus.

[0055] The computer program product according to the invention includes program code, which, when implemented on a computer, originates from control data of a processing machine for molding ophthalmic implants, and / or monitoring data of molding ophthalmic implants, particularly by means of turning, or from control data and / or monitoring data of a processing machine for molding prototypes of ophthalmic implants, particularly from structured encoding for performing identification data of ophthalmic implants or control data of a processing machine for storing structured encoding of prototypes.

[0056] In particular, the ophthalmic implant that can generate structured data by means of computer program products is the artificial lens.

[0057] Here, the computer on which computer programs can be implemented can also be part of the control unit of a laser system or a turning machine.

[0058] Alternatively, the computer on which computer programs can be implemented can also be part of the control unit of a processing machine used to manufacture prototypes.

[0059] Specifically, the computer program product can, for example, be configured to calculate a modulation structure for a structured code corresponding to the lens type and refractive power from a digital lens type identifier and the refractive value of the artificial crystal being manufactured using turning or laser beam forming methods, and preferably simultaneously convert this into control data for its generation. This control data can, for example, control the groove depth, groove width, or groove angle in a CNC file for turning.

[0060] Conversely, when using a prototype for manufacturing ophthalmic implants, the computer program product can be specifically configured to calculate a modulation structure for the corresponding lens type and refractive power from a digital lens type identifier and the refractive value of the prototype for an intraocular lens currently under manufacture, and preferably simultaneously convert this into control data for its generation. Here, when manufacturing the prototype, for example by turning, this control data can also be used to control, for example, the groove depth, groove width, or groove inclination angle in the CNC file.

[0061] The computer program product described above is stored on a computer-readable medium according to the present invention. Attached Figure Description

[0062] The invention will now be described with reference to embodiments. As shown herein:

[0063] - Figure 1a This is a first embodiment of an ophthalmic implant with structured coding according to the present invention. Figure 1b It is the corresponding state diagram of its structured encoding. Figure 1cThis is the schematic diagram of structured coding above, and Figure 1d This is the step of structural coding of the implant.

[0064] - Figure 2a This is a second embodiment of the ophthalmic implant with structured coding according to the present invention. Figure 2b It is its structured encoding corresponding state diagram and Figure 2c This is the schematic diagram of the structured coding principle above.

[0065] - Figure 3 This is a third embodiment of an ophthalmic implant with structured coding according to the present invention.

[0066] - Figure 4 It is a characterization system according to the present invention, which is part of a corresponding microscope system. Detailed Implementation

[0067] Figure 1a This is a first embodiment of an ophthalmic implant 1 with structured coding 5 according to the present invention. The ophthalmic implant 1 is an intraocular lens (IOL) comprising a central optical lens 2 representing an optical imaging element of the IOL and a tactile device 3 having a tactile root 4. The tactile device is connected to the central optical lens 2 along a sub-region of the annular edge 2R of the central optical lens 2 and partially surrounds the central optical lens from both sides. Structured coding 5 of the identification data of the ophthalmic implant 1 is arranged at the tactile root 4 of the IOL and in the region of the tactile device 3 near the tactile root 4. In this case, it is a structured coding 5 of the type and refractive power of the IOL. In this case, the structured coding 5 is used in the form of a barcode system, i.e., rotationally symmetrically arranged around the central optical lens 2 on the tactile root 4 and on the tactile device 3 at the nearest proximity to the central optical lens 2. Here, a binary solution is used by employing structured coding 5, which implements the grooves directly in the same diamond turning machine during or after the formation of the artificial crystal using the same diamond turning method: grooves are generated at different radial positions (groove depth 7 is "1") or no grooves are generated (groove depth 7 is "0") using a fixed groove width 6.

[0068] Therefore, in this case, fewer modulation parameters are required: the radial positions of the grooves can respectively achieve states 1 and 0 at the same groove width 6. Thus, such a binary structured code 5 can be generated in a completely simple manner and can be read again, since it is only necessary to determine whether a groove exists or not at the corresponding radial position 8.

[0069] Subsequently, Figure 1bA state diagram corresponding to the structured code 5 of the first embodiment of the ophthalmic implant 1 according to the present invention, in which the first artificial lens capable of realizing the above two states is shown. Figure 1c The schematic diagram of the above structured coding 5 is shown, and Figure 1d A cross-section of the structured code 5 through the implant 1 is shown. Identical regions are linked together by dashed lines.

[0070] Specifically, in this first embodiment, a binary code is shown, which extends over a spatial width of approximately 1.0 mm. The depth modulation of the groove depth 7 used to generate the two states 0 and 1 can be achieved, for example, with an amplitude of 5 μm-15 μm in the case of a tool diameter of 10 μm.

[0071] If the structured code 5 generated in binary encoding in the first embodiment is subsequently decoded, then the identification data used to identify the artificial lens is displayed: it is an AT LARA torus 929 with a refractive power of SE=25.0D and a cylinder-corrected CYL=6.5D.

[0072] Figure 2a A second embodiment of an ophthalmic implant 1 with structured coding 5 according to the present invention is shown. On the other hand, it is an artificial lens, i.e., the same type and the same refractive power, but with structured coding 5 including additional modulation parameters, and thus allowing spatial compression of the data structure: here the groove depth 7 is additionally modulated in multiple levels 7'-1, 7'-2, 7'-3. It is evident in this second embodiment that the same data content with such quaternary coding requires only about half the space width.

[0073] However, the decoding of this requires a higher resolution for the corresponding characterization system 10 used to identify the artificial crystal than the decoding of the first embodiment: the depth resolution of the trench depth is required to be able to distinguish between different levels 7'-1, 7'-2, 7'-3.

[0074] If the structured code 5 generated in quaternary encoding in this second embodiment is subsequently decoded, then the identification data used to identify the artificial lens is also shown here. This is also the AT LARA torus 929 with a refractive power of SE = 25.0D and a cylinder-corrected CYL = 6.5D.

[0075] As described above, the modulation parameters can include not only the radial position 8 and trench depth 7 of the trench, but also the trench width 6 and / or trench inclination angle, in order to further compress the structured coding 5 and to arrange a smaller spatial width for the same identification data, or to arrange more information, i.e., additional identification data, within the same spatial width. Here, it is feasible that the use of the modulation parameters depends on which optical detection method and which characterization system 10 can be used, and whether the corresponding modulation parameters can therefore be detected.

[0076] Subsequently, Figure 2b A state diagram corresponding to the structured encoding 5 of the second embodiment of the ophthalmic implant 1 according to the present invention, namely the second artificial lens in which the above four states (four different depths) can be realized, is shown. Figure 2c The schematic diagram of the above structured coding 5 is shown.

[0077] Figure 3 A third ophthalmic implant 1 according to the invention is shown, having a structured code 5, which is an AT trifocal intraocular lens (LISA tri) 809 type intraocular lens with a refractive power of 25.0D.

[0078] at last, Figure 4 A characterization system 10 according to the invention is shown for identifying ophthalmic implants 1, particularly intraocular lenses, which is part of a corresponding microscope system 15.

[0079] This embodiment of the characterization system 10 according to the invention includes an illumination system 11 for illuminating the structured code 5 of the intraocular lens, a camera system 12 for recording the structured code 5 of the intraocular lens that can be obtained by means of illumination detection, an image recorded by the camera system 12 for evaluating the structured code 5 that can be obtained by means of illumination detection, an analysis unit 13 for decoding identification data from the image for identifying the ophthalmic implant 1, and a display and / or output device 14 for displaying and / or outputting the decoded identification data of the ophthalmic implant 1.

[0080] Here, this embodiment of the characterization system 10 according to the present invention is also capable of decoding the artificial lens that has been implanted in the patient's eye 20.

[0081] Hereinafter, the features of the present invention described above and in various embodiments can be used not only in the exemplary combinations given, but also in other combinations or individually, without departing from the protection scope of the present invention.

[0082] The description of the method features of the device is similarly applicable to the corresponding methods in terms of those features, and the method features accordingly represent the functional features of the described device.

Claims

1. An ophthalmic implant (1), the ophthalmic implant comprising an optical imaging element (2) and a tactile device (3) having a tactile root (4), the tactile root being connected to the optical imaging element (2) and at least partially surrounding the optical imaging element at a circumferential edge (2R), characterized in that, A rotationally symmetric structured code (5) for the identification data of the ophthalmic implant (1) is arranged in the form of a ring-shaped barcode system in the tactile root (4) and / or in the area of ​​the tactile device (3) near the tactile root (4), the barcode surrounding the circumference of the optical imaging element in the entire area of ​​the tactile root and / or in the area of ​​the tactile device near the tactile root.

2. The ophthalmic implant (1) according to claim 1, characterized in that, The ophthalmic implant is an artificial lens.

3. The ophthalmic implant (1) according to claim 1, characterized in that, The optical imaging element (2) is a central optical lens.

4. The ophthalmic implant (1) according to claim 1, characterized in that, The identification data includes type and refractive power.

5. The ophthalmic implant (1) according to claim 1, characterized in that, Using turning or laser beam forming, rotationally symmetric, structured, i.e., contour-mapped structured codes (5) of the ophthalmic implant are generated directly during or after the forming of the ophthalmic implant (1).

6. The ophthalmic implant (1) according to claim 5, characterized in that, The turning method mentioned is the diamond turning method.

7. The ophthalmic implant (1) according to any one of claims 1-6, characterized in that, There is a structured coding system defined by a set of modulation parameters in space.

8. The ophthalmic implant (1) according to claim 7, characterized in that, There is a structured code described by at least one of a plurality of modulation parameters, including trench width (6), trench depth (7), trench inclination angle, and trench position (8).

9. The ophthalmic implant (1) according to claim 1, wherein, The optical imaging element (2) and the tactile device (3) having the tactile root (4) are made from a single workpiece.

10. The ophthalmic implant (1) according to claim 1, wherein, The structured code is formed directly during or after the molding of the ophthalmic implant (1).

11. A method for manufacturing an ophthalmic implant (1) according to any one of claims 1 to 10, wherein, The ophthalmic implant (1) is shaped by turning or laser beam forming, and during or after the shaping of the ophthalmic implant (1), the rotationally symmetric structured coding (5) of the identification data of the ophthalmic implant (1) is directly achieved by turning or laser beam forming.

12. The method according to claim 11, wherein, The ophthalmic implant is an artificial lens.

13. The method according to claim 11, wherein, The turning method mentioned is the diamond turning method.

14. The method according to claim 11, wherein, The identification data includes type and refractive power.

15. The method according to claim 11, wherein, The structured encoded data for performing the identification data of the ophthalmic implant (1) is obtained from the control data for forming the ophthalmic implant (1) and / or from the monitoring data for forming the ophthalmic implant (1).

16. The method according to claim 15, wherein, The structured encoded data used to perform the identification data of the ophthalmic implant (1) is control data.

17. A computer program product having program code, wherein when the program code is implemented on a computer, the program code originates from control data of a processing machine for molding an ophthalmic implant (1) according to any one of claims 1 to 10 and / or monitoring data of molding the ophthalmic implant (1), or from control data of a processing machine for molding a prototype of an ophthalmic implant (1) according to any one of claims 1 to 10 and / or the monitoring data of molding, generating structured encoding for executing the identification data of the ophthalmic implant (1) or data for storing the structured encoding of the prototype.

18. The computer program product according to claim 17, wherein, The structured encoding of the identification data used to perform the ophthalmic implant (1) or the structured encoding of the prototype used to store the prototype is the control data of the processing machine.

19. A computer-readable medium on which a computer program product according to claim 17 or 18 is stored.

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