Artificial eye lens with reduced number of eye lens foci created based on chromatic aberration

Abstract

The invention relates to an artificial eye lens (1) having at least one optical part (2) which has a front side (3) and a rear side (4) opposite the front side (3), wherein the optical part (2) has at least one base lens body (10), which has a number n, where n is greater than or equal to 2, of base lens body foci (BFN; BFI; BFF), wherein the artificial eye lens (1) has a transmission filter system (12) comprising at least one transmission filter (16, 17, 18) which is optically operatively connected to the base lens body (10), wherein at least one base lens body focus (BFN; BFI; BFF) has chromatic aberration and, depending on the chromatic aberrations thereof, a number m, where m is greater than zero and less than n, of eye lens foci (AF1, AF2) of the artificial eye lens (1) is formed by the transmission filter system (12).

Description

[0001] Artificial eye lens with a reduced number of lens foci generated on the basis of chromatic aberration

[0002] One aspect of the invention relates to an artificial eye lens with at least one optical part. The optical part has a front surface. This front surface is intended to be understood as facing away from the retina, and in particular the optic nerve, when the artificial eye lens is positioned on or in the eye. This front surface is therefore oriented towards the person's surroundings. The optical part also has a back surface opposite the front surface. This back surface is intended to be understood as facing away from the retina, and in particular the optic nerve, when the artificial eye lens is positioned on or in the eye. This back surface is therefore oriented away from the person's anterior surroundings or the anterior surroundings of the eye.

[0003] Artificial lenses for the eye are known, for example, as intraocular lenses. An intraocular lens has an optical component to which at least one haptic element can be attached at its periphery. This haptic element allows the intraocular lens to be held in place within the eye, for example, in a capsular bag. The haptic element is an integral part of the intraocular lens and does not possess any optical imaging properties, unlike the optical component.

[0004] The optical component of an artificial eye lens is typically made of a plastic material, such as a polymer. Due to its shape, this optical component 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.

[0005] Especially with multifocal artificial lenses, it is common for the foci to exhibit chromatic aberration. This longitudinal chromatic aberration, which forms along the principal optical axis of the artificial lens, is usually undesirable because it leads to a blurred image. Therefore, it is well known that such chromatic aberration should be corrected in artificial lenses. This is achieved through sometimes extensive and complex measures to counteract this effect. In addition to this longitudinal chromatic aberration, multifocal artificial lenses can also produce other undesirable effects, such as glare or halos. This is particularly the case when, in addition to this longitudinal chromatic aberration, superimposition occurs with different images that are not in the foci.

[0006] Furthermore, it is known that after cataract surgery, the filtering property for blue light, which the natural lens possesses, is lost. Therefore, it is known in the prior art that artificial lenses, such as intraocular lenses, are coated with specific dyes, for example, a yellow dye, to closely mimic the natural lens and enable the filtering of blue light by this artificial lens. However, this specific filtering of a wavelength, such as blue light, leads to disadvantages, especially in twilight or low-light conditions. This is particularly true because there may be too few photons of this filtered wavelength. This can lead to disadvantages, for example, when driving a vehicle at dusk or at night.

[0007] From EP 1 866 693 B1, a method is known in which the longitudinal chromatic aberration of an artificial eye lens is to be specifically reduced. The method provides for reducing this unavoidable chromatic aberration by means of measures according to the invention in order to maintain the basic number of focal points and to achieve better imaging properties at these original existing foci. The disadvantage, as already explained above, is that these changes maintain the existing foci, but they then exist with reduced light intensity at specific wavelengths.

[0008] In EP 1 194 797 B1, diffractive lenses are mentioned according to the invention therein, which are designed without topographic and thus without optical steps on the lens surface. In this context, a trifocal lens is also mentioned in which the individual zones have different average refractive powers and, furthermore, disadvantageously exhibit longitudinal chromatic aberrations in both the smallest and the largest of the three principal refractive powers.

[0009] In the multifocal lenses described in EP 1 194 797 B1 and the corresponding DE 600 16 219 T2, the n principal refractive powers are generated by at least n different optical ring-shaped zones. Disclosures in this prior art relating to the concept and function of principal subzones and phase subzones are to be considered as disclosed in the present application.

[0010] The multifocal lenses used there are also designed so that the zones and their adjacent arrangement are configured to produce a phase shift of the incident light wave. The zones have uniform surfaces, and there is no topographical or optical step between adjacent zones, meaning that the surface is continuous. In particular, this also means that the wavefront behind the lens is continuous, i.e., that there are no optical path length differences or optical steps between sub-regions of the wavefront behind the lens.

[0011] The phase subzones counteract interference problems, as described in this prior art. Phase shifts between partial waves from different areas or zones of the lens, where these shifts are a prerequisite for multifocality, are not caused by optical steps as is typical for diffractive lenses, but rather by these phase subzones with specific refractive power. Such a design and corresponding construction of a lens with this division of ring-shaped zones into a main subzone and a phase subzone therefore represents a fundamentally different approach.

[0012] Furthermore, DE 102010018436 A1, which corresponds to WO 2011 / 134948 A1, discloses another embodiment of a multifocal lens in which the principle of ring-shaped zones, each zone having a principal subzone and a phase subzone, is also implemented. In this embodiment, n principal refractive powers are formed by a maximum of n-1 different zones, and the average refractive powers of the zones are equal. Disclosures in this prior art relating to the concept and function of principal subzones and phase subzones are to be considered as disclosed in the present application.

[0013] The object of the present invention is to create an artificial eye lens whose imaging properties are improved on the basis of chromatic aberration.

[0014] This problem is solved by an artificial eye lens according to the independent claim.

[0015] One aspect of the invention relates to an artificial eye lens with at least one optical part. The optical part has a front surface. This front surface is intended to be understood as facing away from the retina, and in particular the optic nerve, when the artificial eye lens is positioned on or in the eye. This front surface is therefore oriented towards the person's surroundings. The optical part also has a back surface opposite the front surface. This back surface is intended to be understood as facing away from the retina, and in particular the optic nerve, when the artificial eye lens is positioned on or in the eye. This back surface is therefore oriented away from the person's anterior surroundings or the anterior surroundings of the eye.

[0016] The optical component comprises at least one base lens body. This base lens body has a number n of base lens body foci. This number n is greater than or equal to 2. Furthermore, the artificial eye lens comprises a transmission filter system. This transmission filter system comprises at least one transmission filter that is optically connected to the base lens body. At least one base lens body foci exhibits chromatic aberration. Depending on the chromatic aberration, and thus intentionally utilizing the chromatic aberration, this at least one base lens body foci is, by design and thus defined, formed with the transmission filter system, a number m, in particular multichromic, of the artificial eye lens foci. The number m is greater than 0 and less than n.This creates an artificial lens in which an existing chromatic aberration of a component, namely the base lens body, is cleverly utilized to reduce the focal number of the entire artificial lens compared to the focal number of the base lens body filtered out in the remaining wavelength ranges by the transmission filter system. The artificial lens is therefore designed in such a way that a central element, namely at least one base lens body, is multifocal. Each of these base lens body foci is preferably multichromic. This means that each of these base lens body foci contains a spectrum of different wavelengths from the visible spectral range, in particular the visible spectral range with wavelengths between blue and red light.

[0017] In the artificial eye lens, the existing chromatic aberration is not specifically considered an undesirable effect, nor are attempts made to reduce or eliminate it in the base lens body foci. On the contrary, this effect of chromatic aberration in the base lens body foci is cleverly utilized. Specifically, it is used to generate different, and in this context, fewer, eye lens foci from these base lens body foci exhibiting chromatic aberration. These additional eye lens foci are also preferably multichromic. This means that the reduced number of eye lens foci also preferably exhibits a wavelength spectrum that includes various wavelengths from the visible spectral range, in particular the wavelength range from at least blue light to at least red light, and especially the entire visible spectral range.This creates ocular lens foci that are not only multichromate across the wavelength spectrum, but also exhibit a high photon count at virtually all wavelengths. This allows for the creation of ocular lens foci that are superior to artificial lenses, which aim to eliminate chromatic aberration and therefore, as described earlier, exhibit insufficient intensity or a low photon count at least at some wavelengths.

[0018] This means that, in the case of the artificial eye lens, the actual foci that characterize the entire artificial eye lens—namely, these lens foci—are generated by the entire system consisting of at least one base lens body and the transmission filter system. These lens foci thus determine the optical imaging properties of the artificial eye lens. Therefore, it is specifically intended that the focus number of the artificial eye lens is defined by the number m.

[0019] In one embodiment, it is provided that a chromatic aberration, particularly a longitudinal chromatic aberration, is smaller in an eye lens focus than in at least one base lens body focus, and especially smaller compared to all chromatic aberrations in the base lens body foci. This is a further advantageous embodiment, since the eye lens foci are thus particularly bright across the multichromic wavelength spectrum and also exhibit low chromatic aberration.

[0020] In one embodiment, at least one lens focus is multichromic. In particular, all lens foci are multichromic. Preferably, at least one lens focus emits light in the wavelength spectrum between blue and red light. In particular, all lens foci are configured such that light from this wavelength spectrum between blue and red light is present.

[0021] In one embodiment, at least one artificial lens focus is offset from the base lens body foci when viewed along the principal optical axis of the artificial lens. This embodiment not only changes, and in particular reduces, the number of artificial lens foci compared to the number of base lens body foci, but also creates a shift along the principal optical axis. This allows for the provision of an artificial lens that is highly individually configured with respect to the final number of foci and their axial position, and can even be completely different from the base lens body. This also makes it possible to configure artificial lenses with a wide variety of individual options regarding the number m of foci and their axial position, depending on the base lens body and the transmission filter system.This also enables a further advantage of this proposed artificial lens concept. A defined wavelength range is selected from a chromatic aberration occurring in a base lens body focus using the transmission filter system, and this range then becomes part of the multichromic wavelength spectrum in the lens focus. This is provided for multiple base lens body foci. Therefore, the lens focus, in its multichromic wavelength spectrum, is composed of selected wavelength subranges of the chromatic aberrations from base lens body foci.

[0022] In one embodiment, the base lens body has at least one first lens zone with which a first base lens body focus is formed, or which at least contributes to generating the first base lens body focus. The base lens body has at least one second lens zone, distinct from the first, with which a second base lens body focus is formed, or which at least contributes to generating the second base lens body focus. This makes it possible to selectively form different base lens body foci through specific lens zones of the base lens body.This also means that light falling on the first lens zone, for example, is primarily or essentially directed to one base lens body focus, and light falling on the other lens zone is primarily or essentially directed to another base lens body focus. This also makes it possible to design and configure the base lens body very individually in order to provide a specific number n of base lens bodies and to individually define the position of these base lens body foci along the principal optical axis.This central component of the entire artificial eye lens, namely this at least one basic lens body, already creates a wide range of configuration possibilities, so that a highly individual design of the entire artificial eye lens is then made possible through a transmission filter system in optical interaction with the basic lens body.

[0023] This highly specific modular system, comprising the base lens body and the transmission filter system, allows for a highly variable and flexible design of the aforementioned basic concept, thus enabling a wide range of possibilities for creating an artificial eye lens, all of which offer the aforementioned advantages. It is also possible for more than two different lens zones to form the base lens body. Lens zones can, for example, be ring zones. A central lens zone, on which the principal optical axis is oriented perpendicularly, can be a circular solid surface. In three dimensions, it can be dome-shaped.

[0024] In particular, these lens zones can be formed on the front and / or back of the base lens body. The lens zones can have the same radii, or they can have different radii. It is possible that the front surface with the lens zones forms a refractive structure, or that the lens zones are located on the front surface and form a diffractive structure.

[0025] It is also possible that, for example, a refractive structure of lens zones is formed on the front and a refractive structure of lens zones is formed on the back. It is also possible that a diffractive structure of lens zones is formed on the front and a diffractive structure of lens zones is formed on the back. It is also possible that a diffractive or a refractive structure is formed on the front or back, and that a different type of optical structure is formed on the opposite side of the base lens body.

[0026] The front surface can generally be concave. In one embodiment, the back surface can also generally be concave. In particular, it is provided that the front surface and / or the back surface are convexly curved.

[0027] It is possible that the base lens body, and in particular the artificial lens, has a refractive-diffractive structure on the front and / or a refractive-diffractive structure on the back. However, it is also possible that a refractive-diffractive structure is present on only one of the two sides, i.e., on the front or the back.

[0028] In one embodiment, at least one lens zone has several ring zones. In particular, this is the case for both, and especially all, lens zones. In one embodiment, these ring zones of the lens zones are arranged alternately relative to each other in the radial direction with respect to a principal optical axis of the artificial eye lens. This alternating arrangement forms a zone system with which a third base lens body focus, different from the two base lens body foci, is formed. Thus, in one embodiment, it is possible for at least a third base lens body focus to be formed by two different lens zones that are arranged specifically relative to each other in the radial direction, so that the base lens body is at least trifocal. In another embodiment, it is possible for the several ring zones that form a lens zone to constitute a bifocal lens.In one embodiment, it is possible that the multiple ring zones forming the other lens zone also constitute a bifocal lens. Thus, in one embodiment, two bifocal lens zones, each with multiple ring zones arranged radially and alternating with each other, interact to form a trifocal zone system.

[0029] In one embodiment, a phase zone is formed between each pair of ring zones. This phase zone, which can also be referred to as a phase subzone or secondary subzone, enables targeted phase shifts between partial waves from different areas or lens zones, particularly ring zones, of the artificial eye lens. These phase zones or phase subzones each possess specific refractive powers. A phase zone, in conjunction with a ring zone, which in one embodiment can be referred to as the main subzone, forms a complete ring zone. This particularly advantageously enables the concept described above to create a trifocal lens, specifically a trifocal base lens body, from two alternating, bifocal lens zones.

[0030] In this respect, a phase subzone is smaller in area than a ring zone and is therefore a main subzone of a total ring zone.

[0031] Preferably, an annular zone and an adjoining phase subzone are arranged such that the angle between the two zones is greater than 90 degrees. This also applies in particular to tangents drawn to a curved surface of an annular zone and a curved surface of a phase zone, respectively. Therefore, it is specifically provided that, viewed radially to the principal optical axis, an annular zone and an adjoining phase subzone are arranged without overlap and thus do not overlap with each other.

[0032] In one embodiment, the transmission filter system comprises a first transmission filter. This filter is arranged locally on one of the lens zones. In particular, this first transmission filter is arranged only on one of the lens zones. This first transmission filter is transparent for a first wavelength range of the visible spectral range. This first wavelength range is smaller than the total wavelength range of the visible spectral range. Thus, with such a transmission filter system featuring a transmission filter specifically designed and arranged only locally, light incident on this specific lens zone can be specifically filtered and, conversely, specifically transmitted.This allows for highly individualized and precisely defined local selection of a very specific wavelength subrange of the total incident wavelength range of the visible spectral spectrum, thereby enabling the very specific selection of a wavelength range intended to contribute to the eye lens focus. This embodiment, through the specific type of transmission filter and its specific position on the base lens body, allows for highly individualized wavelength selection at a very specific base lens body focus, which is essentially generated by this lens zone. Thus, this first transmission filter allows for a very targeted decision as to which initial wavelength range from this specific base lens body focus should contribute to the eye lens focus to be generated.

[0033] In one embodiment, the transmission filter system includes a second transmission filter. This second transmission filter is arranged locally on a different lens zone. Specifically, this second transmission filter is arranged locally only on this other lens zone. It is therefore arranged differently from the first transmission filter on the base lens body. In particular, the second transmission filter is transparent for a second wavelength range of the visible spectral range, which is smaller than the total wavelength range of the visible spectral range. The advantages mentioned above for the embodiment with the first transmission filter apply accordingly to the second transmission filter.Thus, in this other lens zone, which interacts with the second transmission filter, a targeted, individual wave selection can be performed at a different base lens body focus generated by this other lens zone. This allows for an individual decision regarding which wavelength subrange of this additional base lens body focus should contribute to the eye lens focus.

[0034] This makes it particularly advantageous to select specific different wavelengths from the different base lens body foci by means of differently filtering transmission filters, which are formed at different local positions of the base lens body and optically interact with the respective lens zones of the base lens body, which then contribute together to a separate eye lens focus or to the individual formation of such a multichromic common eye lens focus.

[0035] In particular, it is therefore preferably provided that, with the first transmission filter, the first transmitted wavelength range contributes to the formation of a common multichromic eye lens focus due to the chromatic aberration of the base lens body focus formed by this lens zone. Correspondingly, it is then preferably provided that, with the second transmission filter, this different second wavelength range contributes to the formation of the common multichromic eye lens focus due to the chromatic aberration of the other base lens body focus formed by this other lens zone.

[0036] In one embodiment, the two wavelength sub-ranges transmitted through the different transmission filters may overlap only partially, particularly along the principal optical axis. It is also possible that these two wavelength sub-ranges do not overlap, especially along the principal optical axis. If they do not overlap, they may be directly adjacent to each other when viewed along the principal optical axis. Alternatively, if they do not overlap, they may be slightly spaced apart. If the base body is trifocal, the three wavelength ranges directed into or forming the respective base lens body foci may overlap at least partially in pairs.It can also be provided that only two such wavelength sub-ranges overlap, but that the third wavelength sub-range does not overlap with one or both of the other wavelength sub-ranges.

[0037] It is also possible that the transmission filter system in one embodiment includes a third transmission filter, which is arranged, in particular, only locally on a third lens zone and is transparent for a third wavelength sub-range of the visible spectral range, which is smaller than the total wavelength range of the visible spectral range. In particular, this third wavelength sub-range overlaps only partially with the first wavelength sub-range and / or only partially with the second wavelength sub-range.

[0038] Such a transmission filter system with several different transmission filters allows for a high degree of variability and flexibility in the configuration of an artificial eye lens with respect to the number m of lens foci and / or their position along the principal optical axis, in a base lens body that has at least two different lens zones, and in particular at least three different lens zones. In one embodiment, the first wavelength range or the first wavelength subrange transmitted by the first transmission filter differs in interval width from the interval width of the second wavelength range or the second wavelength subrange. It is possible that a wavelength subrange comprises only one wavelength, in particular blue light.The other wavelength sub-range may be configured differently, for example, not including blue light. Thus, not only is the spectrum width across which the wavelength ranges extend different, but also the actual wavelengths they each encompass may differ, particularly without overlap.

[0039] However, it is also possible that the wavelength sub-ranges have the same interval width. Even then, they can be non-overlapping.

[0040] In principle, the transmission filter system creates an optical system that, in interaction with the base lens body, enables the generation of individual eye lens foci. These foci are essentially newly generated, and the base lens body foci are masked when viewing the entire artificial eye lens. This means that, in one embodiment, no eye lens focus is formed solely by a base lens body focus. Instead, wavelength ranges enabled by chromatic aberration contribute to the eye lens focus. The remaining wavelength range of a multichromic base lens body focus with chromatic aberration of the base lens body is filtered out by the transmission filter system.This means that the remaining wavelength range of a base lens focus, which is filtered out by the specific transmission filter system, is either no longer present or is present only with such a low intensity that it no longer provides a usable focus in the optical sense. In particular, the transmission filter system reduces this remaining wavelength range of a base lens focus, which is filtered out, to a threshold below which the remaining intensity in this base lens focus is so low that it is no longer available as a usable focus for optical imaging or is no longer recognized as such.

[0041] In one embodiment, an eye lens focus is formed from several base lens body foci that are reduced in their wavelength ranges. This means that the base lens body foci are not completely filtered out and no longer present, but rather their wavelength ranges are reduced and maintained. The base lens body foci reduced in their wavelength ranges are combined or "fused" to form a new eye lens focus that is expanded in the wavelength range compared to these individual reduced base lens body foci.

[0042] In one embodiment, the transmission filter system filters out the wavelength range or partial wavelength range of each base lens body foci exhibiting chromatic aberration that does not contribute to, or is not intended to contribute to, an eye lens focus. Thus, these remaining wavelength ranges, which the base lens body foci exhibit and which are co-generated by the wavelength ranges present there with chromatic aberration, are blocked by the filtering. In another embodiment, the transmission filter system is optically coordinated with the base lens body, in particular such that the chromatic aberration of an eye lens focus is smaller than the chromatic aberration of at least one base lens body focus, and in particular of all base lens body foci.

[0043] In one embodiment, the transmission filter system is arranged, particularly directly, on the base lens body. Specifically, the transmission filter system is permanently attached to the base lens body. Therefore, it cannot be removed from the base lens body without being destroyed, and in particular, it cannot be reversibly removed and reattached. The transmission filter system is preferably arranged on a front and / or a rear side of the base lens body.

[0044] The base lens body is designed to be free of cavities. Its anterior surface can be convex, concave, or planar. Its posterior surface can also be convex, concave, or planar. For example, a biconvex shape of the base lens body is possible. The base lens body is designed as a single piece.

[0045] In one embodiment, the transmission filter system is additionally designed to correct chromatic aberration of the eye, in particular of the cornea of ​​the eye into which the artificial lens is to be implanted. In another embodiment, the transmission filter system is also additionally designed to correct chromatic aberration of the artificial lens itself.

[0046] The artificial lens is, in particular, an intraocular lens. It is specifically and by design designed for implantation into a capsular bag in the eye. It can therefore be a capsular bag-fixated basic intraocular lens. However, it can also be a phakic intraocular lens or a so-called accessory intraocular lens. An accessory intraocular lens is designed to be implanted into the sulcus in addition to the capsular bag-fixated basic intraocular lens. The artificial lens can also be an artificial lens system, in particular an IOL system, which comprises the basic intraocular lens and a phakic intraocular lens or an accessory intraocular lens. One aspect of the invention relates to an artificial lens with at least one optical part. The optical part has a front surface.The front surface of the artificial lens is designed to face away from the retina, and in particular the optic nerve, when the artificial lens is positioned on or in the eye. This front surface is therefore oriented towards the person's surroundings. The optical component has a back surface opposite the front surface. This back surface is also designed to face away from the person's anterior surroundings, and in particular the anterior surroundings of the eye, when the artificial lens is positioned on or in the eye.

[0047] The optical part comprises at least one base lens body. This base lens body has a number n, where n is greater than or equal to 2, of base lens body foci. In addition to the base lens body, the artificial eye lens has a focus number change system and / or a focus number shift system, particularly in relation to the base lens body foci. With this focus number change and / or focus number shift system, a number m of eye lens foci of the artificial eye lens is formed, depending on the chromatic aberration of the base lens body foci and depending on the number n. The number m is particularly smaller than the number n and / or one eye lens focus, particularly a multichromic one, is offset along the principal optical axis of the artificial eye lens relative to the base lens body foci.The base lens body foci are hidden when considering the entire artificial eye lens with its optical properties.

[0048] With this artificial eye lens, the corresponding advantages are achieved as outlined above for the aforementioned first independent aspect of an artificial eye lens. It is possible that the focus number change system and / or the focus number shift system may include at least one transmission filter system. This system, through optical interaction with the base lens body, can achieve the corresponding reduction in the number of foci compared to the base lens body foci and / or the axial shift along the principal optical axis. Exemplary embodiments of the first independent aspect relating to the artificial eye lens are to be considered advantageous embodiments of this second independent aspect relating to the artificial eye lens.However, the focus number change system and / or the focus number shift system may also include other optical elements that enable this focus number reduction and / or this axial focus shift.

[0049] In one embodiment, the number n can be two, so that the number m is one. Thus, a monofocal artificial lens is formed from a bifocal base lens body. It is also possible for the number n to be three and the number m to be two or one.

[0050] In particular, the base lens body is designed such that the chromatic aberration, viewed along the principal optical axis of the artificial eye lens, overlaps in the base lens body foci. This means that this axial wavelength splitting in the base lens body foci only partially overlaps axially. Specifically, a portion of the wavelength spectrum split by chromatic aberration in one base lens body foci overlaps axially with a portion of the wavelength spectrum split by chromatic aberration in another base lens body foci.

[0051] In the artificial lens, the chromatic aberration of each of the base lens body foci is utilized and, through appropriate selection, a focusing effect is achieved in a new lens focus. Thus, a specific wavelength range is selected from the base lens body foci based on their respective chromatic aberrations, contributing to the multichromic composition and formation of a lens focus.

[0052] Another aspect of the invention relates to a method for producing an artificial eye lens, in particular comprising the following steps: configuring at least one base lens body with a number n, with n greater than or equal to 2, of base lens body foci, in particular base lens body foci having longitudinal chromatic aberration;

[0053] Generating a transmission filter system that is arranged in optical interaction with the base lens body, in particular such that the transmission filter system is intended to form a defined number m, especially multichromic, foci of the artificial eye lens. The number m is greater than 0 and less than n.

[0054] Embodiments of the artificial eye lens according to the above-mentioned aspect are to be regarded as advantageous embodiments of the method. In particular, features of the artificial eye lens are obtained, and especially generated, by simulation and produced during manufacturing by forming the eye lens.

[0055] Another aspect of the invention relates to an artificial eye lens obtainable by a method according to the above-mentioned aspect or an advantageous embodiment thereof.

[0056] 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, particularly those described above, are considered disclosed which go beyond or deviate from the combinations of features described in the cross-references of the claims. 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 case of deviations, for example, due to measurement errors, system errors, DIN tolerances, etc., which also includes explanations relating to substantially corresponding values ​​and information.

[0057] Exemplary embodiments of the invention are explained in more detail below with reference to schematic drawings. These show:

[0058] Fig. 1 is a schematic top view of an embodiment of an artificial eye lens according to the invention;

[0059] Fig. 2 shows a schematic top view of a further embodiment of an artificial eye lens according to the invention;

[0060] Fig. 3 shows a schematic top view of a further embodiment of an artificial eye lens according to the invention;

[0061] Fig. 4 shows a schematic sectional view through an embodiment of an artificial eye lens according to the invention, showing the optical imaging properties of this artificial eye lens;

[0062] Fig. 5 shows a schematic representation of a partial area of ​​an optical part of an embodiment of an artificial eye lens according to the invention;

[0063] Fig. 6 shows a simplified representation of an embodiment of an artificial eye lens with a trifocal base lens body and a representation of two eye lens foci; and

[0064] Fig. 7 is a simplified representation corresponding to Fig. 6, in which the artificial lens has a bifocal base lens body and the artificial lens has only one lens focus. In the figures, identical or functionally equivalent elements are designated with the same reference numerals.

[0065] Figure 1 shows a schematic top view of an embodiment of an artificial eye lens 1. The artificial eye lens 1 is an intraocular lens. It has an optical part 2. This optical part 2 forms the actual optical imaging element of the artificial eye lens 1. It can be designed in various ways and has a disc-like shape in its basic geometry. This optical part 2 has a front surface 3. The front surface 3 can be convex or concave. The front surface 3 is, by design, the side that, when the artificial eye lens 1 is implanted in the eye, or, in the case of a contact lens, rests against the cornea of ​​the eye, faces the person's anterior environment. This also means that the front surface 3 is the side of the artificial eye lens 1 that, when installed in the eye, faces away from the retina, and in particular from the optic nerve.The optical part 2 also has a back surface 4 opposite the front surface 3. This back surface can be convex or concave. When the artificial lens 1 is positioned in the eye, the back surface 4 faces the retina, particularly the optic nerve. The optical part 2 has a principal optical axis A, which is oriented perpendicular to the plane of the figure in Fig. 1. The principal optical axis A penetrates the front surface 3 and the back surface 4 centrally.

[0066] In the exemplary embodiment, this artificial eye lens 1 also has a haptic 5. In this embodiment, this is formed by two separate haptics 6 and 7. These haptics 6 and 7 each terminate at one end on a circumferential wall 8 of the optical part 2.

[0067] The optical part 2 can contribute to the optical imaging properties across its entire geometry. In another embodiment, the optical part 2 may have an outer ring 9, viewed radially to the principal optical axis A. This ring can also be referred to as an outer end ring or peripheral ring. This peripheral ring, which is symbolically bounded radially inwards by the dashed line in Fig. 1, does not possess any optical imaging properties. It is integrated and thus formed integrally with the rest of the optical part 2. In particular, the optical part 2 is made of a polymer material. The optical part 2 and the haptic element 5 can be formed integrally. Alternatively, the clips 6 and 7 may be separate components that are inserted or glued onto the optical part 2.

[0068] Figure 3 shows an embodiment of an optical part 2 of an artificial eye lens 1. The artificial eye lens 1 can also have a haptic 5. However, it can also be designed without such a haptic 5. This can also be the case in the examples in Figures 1 and 2.

[0069] Figure 3 illustrates, by way of example and representative of many other configurations, that the optical part 2 has at least one base lens body 10. In addition to this base lens body 10, the optical part 2 also has a focus number change system and / or a focus number shift system 11. This is indicated here only symbolically with the corresponding reference numeral. The focus number change system and / or the focus number shift system 11 is configured to form a number m of eye lens foci of the artificial eye lens 1, depending on the chromatic aberration, in particular utilizing the present chromatic aberration, and depending on a number n, which describes the number of base lens body foci and where n is greater than or equal to 2. The number m is less than the number n and greater than or equal to 1. The entire artificial eye lens 1 then has only the eye lens foci.The base lens body foci are then hidden.

[0070] The focus number change and / or focus number shift system 11 preferably includes a transmission filter system 12. This is also only symbolically characterized by the reference numeral in Fig. 3.

[0071] The base lens body 10 has the previously mentioned number n of base lens body foci. This means that the base lens body 10 is at least bifocal.

[0072] In particular, the base lens body 10 has a first lens zone 13. Specifically, this first lens zone 13 generates or forms at least one first base lens body focus. It is possible that this first lens zone 13 is formed from only one depicted zone area or from several zone areas. For example, in Fig. 3, this first lens zone is a centrally located lens zone through which the principal optical axis A of the artificial eye lens 1 passes. In the top view of the front face 3 of the optical part 2 shown in Fig. 3, the principal optical axis A is oriented perpendicular to the plane of the figure. This is also the case in Fig. 1 and Fig. 2.

[0073] In one embodiment, this first base lens body focus could be, for example, a base lens body near focus (BFN). In another embodiment, this centrally located first lens zone 13 could form a base lens body far focus (BFF) as the first base lens body focus.

[0074] In one embodiment, the base lens body 10 can be configured for the first lens zone.

[0075] 13 different second lens zones 14. This second lens zone 14 forms at least one second base lens body focus that differs from the first base lens body focus. If the base lens body 10 has only two base lens body foci, then, for example, the base lens body focus formed by the second of the lens zones 14 is a base lens body far focus (BFF) if the base lens body focus formed by the first lens zone 13 is a base lens body near focus (BFN). If the configuration of the two lens zones 13 and

[0076] 14 inverses, i.e. reversed, so the respective base lens body foci generated thereby are also reversed.

[0077] In a further embodiment, the base lens body 10 can have a third lens zone 15. This zone is different from the first lens zone 13 and from the second lens zone 14. This third lens zone 15 preferably forms a third base lens body focus. In the illustration in Fig. 3, which is merely an example and not exhaustive, the third lens zone 15 can form a base lens body far focus (BFF). This is particularly appropriate when the first lens zone 13 forms a base lens body near focus (BFN) and the second lens zone 14 forms a base lens body intermediate focus (BFI).

[0078] On the other hand, if, for example, the first lens zone 13 forms a basic lens body-

[0079] If a long focus BFF is formed and a base lens body intermediate focus BFI is formed with the second lens zone 14, then a base lens body near focus BFN is preferably formed with the third lens zone 15.

[0080] In the embodiments shown in Fig. 3, the lens zones 13, 14 and 15 are each formed by only one surface area. Lens zones 14 and 15 are ring zones.

[0081] It is also possible that lens zone 13 and / or lens zone 14 and / or lens zone 15 are each formed from several separate surface areas. For example, at least two rings can form a lens zone in each case. These rings can be arranged radially to the principal optical axis A, with one ring zone of another lens zone being positioned between them.

[0082] It is not only in this context that it is possible for the front surface 3 and / or the back surface 4 to be refractive. It is also possible that, in another embodiment, the front surface 3 and / or the back surface 4 are at least partially diffractive.

[0083] In particular, it is provided that the system 11, especially the transmission filter system 12, comprises at least one transmission filter. Specifically, this filter is arranged only locally on the front 3 and / or the back 4, and in particular only locally on an associated lens zone 13 and / or 14 and / or 15. Thus, an individual positioning is formed between a lens zone 13 and / or 14 and / or 15 and a transmission filter of the transmission filter system 12. This defines and intentionally creates an individual optical interaction between the transmission filter system 12 and the lens zones 13 and / or 14 and / or 15.

[0084] Figure 3 shows a schematic sectional view of an embodiment of an artificial eye lens 1 with an embodiment of an optical part 2. The design of the optical part 2 is merely exemplary and not exhaustive. This specific illustration is intended to explain the general concept. In this embodiment, the base lens body 10 has a convexly curved front surface 3. In particular, it also has a convexly curved back surface 4.

[0085] In the example shown, a lens zone 13 is present. This is the centrally located first lens zone 1 of the lens zone system. In this embodiment, this first lens zone 13 is a near zone N. This means that it is designed to form at least one base lens body near focus BFN. Radially adjacent to this is a second lens zone 14. This is an annular zone. In this embodiment, this second lens zone 14 is an intermediate zone I. In this embodiment, the second lens zone 14 is designed to form at least one base lens body intermediate focus BFI. Furthermore, a third lens zone 13 is also formed. This is an annular zone. In this embodiment, this third lens zone 15 is a far zone F. In this embodiment, this third lens zone 15 is designed to form at least one base lens body far focus BFF.

[0086] Figure 4 also shows a principal plane H of the artificial eye lens 1, in particular of the base lens body 10. Furthermore, the light L incident on the artificial eye lens 1 is shown. In the simplified representation, it can be seen that the base lens body 10 is trifocal in the exemplary embodiment, i.e., it has the aforementioned base lens body foci BFN, BFI, and BFF.

[0087] As also shown schematically in Fig. 4, these base lens body foci BFN, BFI, and BFF each exhibit longitudinal chromatic aberration. For clarity, the complete chromatic aberration is shown only for the third lens zone 15. For the sake of understanding, the chromatic aberration is symbolized here by the light rays of blue light b, green light g, and red light r. As can be seen, this chromatic aberration in the base lens body foci BFN, BFI, and BFF overlaps in certain areas along the principal optical axis A. This means that the respective different wavelength ranges of the base lens body foci BFN, BFI, and BFF overlap axially only in certain areas, but they do overlap.

[0088] This describes a specific individual configuration of the base lens body 10 in this embodiment. Starting from this basic configuration of the base lens body 10, the artificial

[0089] The eye lens 1 already describes a system 11 as a transmission filter system 12.

[0090] In the exemplary embodiment, a first transmission filter 16 of the transmission filter system 12 is arranged on the first lens zone 13. Specifically, this first transmission filter 16 is formed or arranged locally only on the first lens zone 13. The first transmission filter 16 is transparent for a first wavelength range or a partial wavelength range of the visible spectral range. For the remaining partial wavelength range of the visible spectral range, this first transmission filter 16 is opaque. In the exemplary embodiment, the first transmission filter 16 is transparent for a partial wavelength range of red light and opaque for the remaining partial wavelength range, in particular the partial wavelength range containing green and blue light.This means that only red light is allowed to pass through this first transmission filter 16 in the area of ​​the first lens zone 13.

[0091] Furthermore, in the illustrated embodiment, a second transmission filter 17 of the transmission filter system 12, different from the first transmission filter, is formed or arranged on the second lens zone 14. In particular, this second transmission filter 17 is arranged only on this second lens zone 14. The second transmission filter 17 is transparent for a second wavelength range or a partial wavelength range of the visible spectral range and opaque for a remaining partial wavelength range of the visible spectral range. The second partial wavelength range overlaps, if at all, only partially with the first, transmitted partial wavelength range of the first transmission filter 16. In the exemplary embodiment, the second transmission filter 17 is transparent to green light and, in particular, opaque to red and blue light.

[0092] Furthermore, the exemplary embodiment provides that the transmission filter system 12 includes a third transmission filter 18. This third transmission filter 18, which differs from the other two transmission filters 16 and 17, is specifically formed or arranged only locally on the third lens zone 15. It is transparent for a third wavelength range or a partial wavelength range of the visible spectral range. This third partial wavelength range of the visible spectral range is also smaller than the total wavelength range of the visible spectral range. Here, too, it is provided that the third partial wavelength range overlaps only partially with the first, transmitted partial wavelength range and / or only partially with the second, transmitted partial wavelength range.The exemplary embodiment shows symbolically that the transmission filter 18 is transparent to blue light and, in particular, does not transmit green light and red light.

[0093] Figure 4 symbolically shows a configuration in which an artificial lens 1 has a single focus AF1. Here, a monofocal artificial lens 1 is formed with only this single focus AF1. As can be seen in Figure 4, the chromatic aberration present in each of the three base lens body foci BFN, BFI, and BFF is cleverly utilized to form a multichromic focus AF1 through the individual and skillful selection of wavelength ranges.

[0094] The transmission filter system 12 thus very cleverly enables, on the one hand, the local arrangement on the base lens body 10 and, in particular, the optical interaction with the specific lens zones 13 and / or 14 and / or 15 to create a multichromic composition of the eye lens focus AF1 from wavelength sub-ranges derived from the chromatic aberration of the base lens body foci BFN, BFI and BFF. This is achieved in particular through the deliberate and specific selection of the transmitted wavelength sub-ranges.

[0095] The wavelengths not transmitted by the transmission filters 16, 17, and 18 are thus blocked or filtered out. In this context, the final artificial eye lens 1 essentially only has the eye lens focus AF1 as a multichromic focus. The base lens body foci BFN, BFI, and BFF are no longer present, and their chromatic aberration is virtually eliminated. This is because the remaining and selected wavelength ranges of these base lens body foci BFN, BFI, and BFF form a new eye lens focus AF1. As can be seen in the example in Fig. 4, this focus is spatially distinct from the base lens body foci BFN, BFI, and BFF along the principal optical axis A.It is therefore intended that the base lens body foci BFN, BFI and BFF are each eliminated as a whole, with their respective intended and used chromatic aberration, and that the wavelength ranges that are only transmitted and used by these base lens body foci BFN, BFI and BFF due to their chromatic aberration merge virtually into a new eye lens focus AF1.

[0096] It should be mentioned that, for illustrative purposes and clarity only, the chromatic aberration of these foci of the base lens body 10 is exaggerated in Fig. 4.

[0097] In particular, it is intended that the longitudinal chromatic aberration of the eye lens focus AF1 is smaller than a longitudinal chromatic aberration of a base lens body focus, especially all base lens body foci BFN, BFI and BFF.

[0098] It should be noted again that both the number and arrangement of lens zones 13, 14, and 15 are merely examples, and / or the design of system 11, in particular the transmission filter system 12, is also merely an example. In this context, the transmission filter system 12 may be individually designed depending on the configuration of the base lens body 10, for example, whether it is bifocal or trifocal, and / or the axial position of the respective base lens body foci and / or the chromatic aberration of these base lens body foci. Thus, it is possible, for example, that no transmission filter is present on lens zone 13 and / or lens zone 14. It is also possible that no transmission filter is present on lens zone 14 and / or lens zone 15.In another embodiment, it may also be provided that, for example, no transmission filter is present on lens zone 13 and / or lens zone 15. A similar arrangement is possible with a bifocal configuration of the base lens body 10, so that an individual transmission filter is arranged either on both lens zones, on only one of the two lens zones, or on both lens zones. It is also possible that the wavelength ranges or wavelength subranges of the visible spectrum transmitted by the transmission filters 16 and / or 17 and / or 18 have the same or different intervals. In particular, it may be provided, for example, that these intervals are different.For example, in a bifocal configuration of the base lens body 10, a transmission filter, which optically interacts with an associated lens zone, may transmit only blue light and filter out the other wavelengths of the visible spectrum. A second transmission filter, which optically interacts with the other lens zone of the base lens body 10, may then filter out precisely this blue light and transmit the remaining wavelengths of the visible spectrum. This allows for the individual filtering of blue light, not only in such a bifocal configuration of the base lens body.This is not only advantageous in this embodiment, but also, for example, to improve vision with such an artificial eye lens 1 when using digital media, such as a tablet or a computer screen.

[0099] As can be seen in the example shown in Fig. 4, at least one eye lens focus AF1 is multichromic, in particular it has the entire or substantially the entire spectrum of the visible spectral range.

[0100] Figure 5 shows a simplified embodiment of an optical part 2, in particular with a front surface 3. In this embodiment, the front surface 3 is formed with a diffractive structure. This can be formed from two lens zones 13 and 14. The lens zone 13 has several surface zones, in particular ring zones 130. Furthermore, the second lens zone 14 is also designed to have several zone areas, in particular ring zones 140. As can be seen, the ring zones 130 and 140 are arranged alternately relative to each other in the radial direction to the principal optical axis A. In particular, it is provided that the ring zones 130 of the first lens zone 13 form a bifocal lens. Furthermore, it is preferably provided that the several ring zones 140 of the lens zone 14 also form a bifocal lens.The design and alternating arrangement of these specific zones 130 and 140 creates a zone system within the overall system, forming a trifocal lens. Therefore, in this embodiment, the base lens body 10 is trifocal.

[0101] As schematically illustrated in Fig. 5, each ring zone is designed with a main subzone and an associated phase subzone or secondary subzone. For example, a main subzone 130a and a phase subzone 130b are formed. This is also provided for the ring zones 140. There, too, a main subzone 140a and a phase subzone 140b are preferably provided. The phase subzones are smaller in area, in particular significantly smaller, than the respective main subzones. Preferably, they have a maximum area of ​​less than or equal to 20 percent, and in particular less than or equal to 10 percent, of a main subzone. As also indicated in Fig. 5, the main subzones and the adjoining phase subzones have different curvatures.In particular, the main subzones and the phase subzones are arranged radially to the main optical axis, and especially completely without overlap. This also means, in particular, that the angle between a main subzone and a subsequent phase subzone, especially their respective tangents, is greater than 90 degrees.

[0102] A phase subzone and an associated main subzone are therefore arranged without overlap when viewed in the direction perpendicular to the optical principal axis A.

[0103] Figure 6 shows a simplified representation of the principal optical axis A and principal plane H of an artificial eye lens 1, in particular a base lens body 10. In this embodiment, the base lens body 10 is again trifocal. However, in this configuration, the artificial eye lens 1 has two different lens foci AF1 and AF2. These are shown here as examples, each positioned between two base lens body foci. The production of this bifocal eye lens 1 from a trifocal base lens body 10 is as described in Figure 4. Here, too, the base lens body foci BFI, BFN, and BFF are shown only for illustrative purposes, as they are filtered out by the transmission filter system 12 and are no longer present on the entire eye lens 1.In particular, the corresponding configuration of lens zones 13, 14, and 15 and the individual chromatic aberrations enables this configuration to interact optically with a transmission filter system 12. This allows for a defined alignment between the focal points and the chromatic aberrations. In this respect, the eye lens focus AF1 represents a distance focus, and the eye lens focus AF2 represents a near focus. Here, too, the eye lens foci AF1 and AF2 preferably exhibit multichromacy; in particular, the chromatic aberration of the eye lens foci AF1 and AF2 is smaller than the chromatic aberration in the base lens body foci BFN, BFI, and BFF shown.

[0104] One advantage of such a bifocal artificial eye lens 1 compared to a monofocal solution, as explained with reference to Fig. 4, is that in one embodiment the overall transmission is higher. This is particularly true, for example, because the intermediate part, i.e., the lens zone responsible for the base lens body intermediate focus (BFI) in the base lens body 10, can be omitted.

[0105] It should be mentioned again at this point that the individual configuration of the base lens body 10 with an individual number n of foci and / or their configuration, in particular with regard to location and / or size and / or whether refractive or diffractive, and / or taking into account and individually defined setting and here even desired chromatic aberration with then optically matched interaction with a system 11, in particular a transmission filter system 12, enables a wide variety of artificial eye lenses 1 with regard to the number m and / or their axial position and / or their respective individual chromatic aberration.

[0106] Figure 7 shows a simplified embodiment, similar to Figure 6, in which the base lens body 10 is bifocal, specifically having two base lens body foci, BFN and BFF. The number m of eye foci is 1, namely only the eye lens focus AF1. Viewed in the axial direction of the principal optical axis A, this focus is located between the two fictitious base lens body foci, which are blocked by the system 11.

[0107] For the sake of clarity, it should be mentioned that in the examples according to Fig. 6 and Fig. 7, the base lens body foci are also shown for the purpose of understanding and clarification; however, these are filtered out by the system 11, in particular the transmission filter system 12, in all those wavelength ranges that do not contribute to the eye lens foci AF1 and AF2 or only to AF1.

Claims

Patent claims 1. Artificial eye lens (1) with at least one optical part (2) having a front (3) and a back (4) opposite the front (3), wherein the optical part (2) has at least one base lens body (10) having a number n, with n greater than or equal to 2, of base lens body foci (BFN; BFI; BFF), wherein the artificial eye lens (1) has a transmission filter system (12) with at least one transmission filter (16, 17, 18) that is in optical interaction with the base lens body (10), characterized in that at least one base lens body foci (BFN; BFI; BFF) has chromatic aberration and, depending on its chromatic aberrations, a number m, with m greater than zero and less than n, of eye lens foci (AF1 , AF2) of the artificial eye lens (1) are formed with the transmission filter system (12).

2. Artificial eye lens (1) according to claim 1, characterized in that at least one eye lens focus (AF1 , AF2), in particular all eye lens foci (AF1, AF2), are multichromic.

3. Artificial eye lens (1) according to claim 1 or 2, characterized in that the at least one eye lens focus (AF1, AF2) is formed along the principal optical axis (A) of the artificial eye lens (1) offset from the base lens body foci (BFN; BFI; BFF).

4. Artificial eye lens (1) according to one of the preceding claims, characterized in that the base lens body (10) has at least a first lens zone (13) with which a first base lens body focus (BFN; BFI; BFF) is formed, and has at least a second lens zone (14) different from the first base lens body focus (BFN; BFI; BFF) with which a second base lens body focus (BFN; BFI; BFF) different from the first base lens body focus (BFN; BFI; BFF) is formed.

5. Artificial eye lens (1) according to claim 4, characterized in that the lens zones (13, 14) each have several ring zones (130, 140) which are arranged alternately to each other in a radial direction to an optical principal axis (A) of the artificial eye lens (1), wherein the alternating arrangement forms a zone system with which a third base lens body focus (BFN; BFI; BFF) different from the two base lens body foci (BFN; BFI; BFF) is formed.

6. Artificial eye lens (1) according to one of the preceding claims 4 or 5, characterized in that the transmission filter system (12) has a first transmission filter (16) which is, in particular, arranged locally on one of the lens zones (13) and is transparent for a first wavelength range of the visible spectral range which is smaller than the total wavelength range of the visible spectral range.

7. Artificial eye lens (1) according to claim 6, characterized in that the transmission filter system (12) has a second transmission filter (17) which, in particular, is arranged locally on a different lens zone (14) than the first transmission filter (16) and is transparent for a second wavelength range of the visible spectral range which is smaller than the total wavelength range of the visible spectral range, in particular wherein the second wavelength range only partially overlaps with the first wavelength range.

8. Artificial eye lens (1) according to one of the preceding claims 6 or 7, characterized in that the first wavelength range transmitted by the first transmission filter (16) differs in interval width from the interval width of the second wavelength range, in particular one wavelength range comprises only one wavelength, in particular blue light, and the other wavelength range does not include blue light.

9. Artificial eye lens (1) according to any one of the preceding claims, characterized in that the transmission filter system (12) filters out the wavelength range of the respective base lens body foci (BFN; BFI; BFF) exhibiting chromatic aberration that does not contribute to an eye lens focus (AF1, AF2).

10. Artificial eye lens (1) according to one of the preceding claims, characterized in that the transmission filter system (12) is operatively connected to the base lens body (10) and is tuned such that the chromatic aberration of an eye lens focus (AF1, AF2) is smaller than a chromatic aberration of at least one base lens body focus (BFN; BFI; BFF) filtered out by the transmission filter system (12) in the remaining wavelength ranges.

11. Artificial eye lens (1) with at least one optical part (2) having a front (3) and a back (4) opposite the front (3), wherein the optical part (2) has at least one base lens body (10) having a number n, with n greater than or equal to 2, of base lens body foci (BFN; BFI; BFF), characterized in that the artificial eye lens (1) has, in addition to the base lens body (10), a focus number change and / or a focus number shift system (11) with which, depending on the chromatic aberration of the base lens body foci (BFN; BFI; BFF) and depending on the number n, a number m of eye lens foci (AF1, AF2) of the artificial eye lens (1) is formed, wherein the number m is less than the number n and / or an eye lens focus (AF1 , AF2) along the principal optical axis (A) of the artificial eye lens (1) is located at the The base lens body foci (BFN; BFI; BFF) are displaced.

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