DE102014113968A1 - Ophthalmic lens with annular optical zones having individual toric refractive surface profiles - Google Patents

Abstract

The invention relates to an eye lens (1) having an optical part (2) which has a first optical side (4a) and an opposite second optical side (4b) viewed in the direction of a main optical axis (A) of the eye lens (1), and a plurality of ring-shaped optical zones (5, 6, 7, 8, 9) running around the main optical axis (A) and formed on at least one optical side (4a, 4b), a first optical zone (5, 6, 7, 8, 9) has a first toric refractive surface profile (5a, 6a, 7a, 8a, 9a) with at least two major zone meridians (5b, 5c; 6b, 6c; 7b, 7c; 8b, 8c; 9b, 9c) and at least one second optical zone (5, 6, 7, 8, 9) having a second toric refractive surface profile (5a, 6a, 7a, 8a, 9a) with at least two major zone meridians (5b, 5c; 6b, 6c; 7b, 7c; 8b, 8c; 9b, 9c), wherein at least the first optical zone (5, 6, 7, 8, 9) and the second optical zone (5, 6, 7, 8, 9) in the radial direction of the optical Part (2) jew are limited by the fact that a zone refractive power is unchanged between a radially inner zone edge (6d) and a radially outer zone edge (6e) of the respective optical zone (5, 6, 7, 8, 9) and / or the azimuthal axis position of the zone zone. Main meridians (5b, 5c; 6b, 6c; 7b, 7c; 8b, 8c; 9b, 9c) to each other of the respective optical zone (5, 6, 7, 8, 9) is unchanged, and the first optical zone (5, 6, 7, 8, 9) has a first zone refractive power and the second optical zone (5, 6, 7, 8, 9) has a different second zone refractive power, and / or the first optical zone (5, 6, 7, 8, 9) has a first azimuthal axis position of the zone main meridians (5b, 5c, 6b, 6c, 7b 7c, 8b, 8c, 9b, 9c) and the second optical zone (5, 6, 7, 8, 9) has a second azimuthal axis position different from the first azimuthal axis position of the zone main meridians (5b, 5c, 6b, 6c; 7b, 7c, 8b, 8c, 9b, 9c).

Description

The invention relates to an eye lens having an optical part, which has a first optical side and an opposite second optical side viewed in the direction of a main optical axis of the eye lens. The eye lens also has a plurality of circumferential around the optical main axis, formed on at least one side, annular optical zones.

State of the art

Eye lenses in the form of intraocular lenses are known in many different embodiments.

Due to its relatively complex structure and thus in particular the parts intended for optical imaging and / or other influencing factors, the human eye may be afflicted with a wide variety of vision defects. These can be different in strength individually, on the other hand, a plurality of different vision defects in one eye.

In this context, eye lenses in the form of intraocular lenses are known, which have circumferential around a major optical axis of the eye lens annular optical zones. In the radial direction, these optical zones are demarcated geometrically in such a way that in each case one step is formed. Such configurations are known in diffractive structures, which may also be Fresnel zones.

In addition, it is also known to correct the visual defect astigmatism, toric eye lenses form. For example, a toric intraocular lens is made of DE 10 2005 028 933 A1 known. However, these known toric lenses have a relatively large volume in their particular optical part. This is created by the required center thickness of the optical part in the steep main meridian. Therefore, lenses with high spherical power and cylinder values are only to be implanted through larger incision widths, or the diameter of the optical part must be reduced.

In toric lenses major meridians are present, which can be arranged for example at an angle of 90 ° to each other, wherein ei ne toric lens in these so-called main meridians has two different refractive powers. Spherical refractive power or spherical refractive power is the smaller of the two refractive indices, which occurs in the shallower main meridian. In addition, the difference between the larger and the smaller refractive power is referred to as a cylindrical refractive power, the larger refractive power thus being present at the steeper main meridian.

From the AT 507 873 A2 and the AT 507 874 A2 Lenses with annular zones are known. In addition, the lens also has a circular refractive power profile superimposed on the entire optical side of an optical part, for example in the form of a common entire toric surface. The annular zones are on a first optical side of the optical part, and the toric surface is formed on another side of the optical part. In these known embodiments of lenses, however, the correction of different, in particular all forms, of astigmatism is only possible to a limited extent.

In particular, an irregular astigmatism, in which in the radial direction of the eye, the astigmatism in terms of its characterizing parameters in terms of value does not remain the same, can only be corrected by these known lenses very limited.

Presentation of the invention

It is an object of the present invention to provide an eye lens, by means of which the visual defect astigmatism can be corrected improved.

This object is achieved by an eye lens having the features of claim 1.

An eye lens according to the invention comprises an optical part which has a first optical side and an opposite second optical side viewed in the direction of a main optical axis of the eye lens. The eye lens further comprises a plurality of circumferential around the optical main axis, formed on at least one side annular optical zones.

An essential idea of the invention lies in the fact that a first optical zone has a first toric surface profile with at least two zone main meridians. The eye lens further comprises at least a second optical zone having a second toric surface profile with at least two zone major meridians, wherein the second toric surface profile is different than the first toric surface profile of the first optical zone. These two specific optical zones, which each have an individual toric refractive surface profile, are respectively bounded in the radial direction of the optical part or extend in the radial direction in each case so far, a zone refractive index of this optical zone is unchanged between a radially inner zone edge of the respective optical zone and a radially outer zone edge of the optical zone and / or an azimuthal axis position of the zone main meridians relative to each other of the respective optical zone is unchanged. That is, the optical zones individually extend in the radial direction to such an extent that at least one of the parameter values zonal refractive index and azimuthal axis position of the zone principal meridians is constant in the radial direction.

The first optical zone has a first zone refractive power, and the second optical zone has a different second zone refractive power therefor. In addition to or instead of this, in the first optical zone, a first azimuthal axis position of the zone main meridians is formed relative to each other and at the second optical zone a second azimuthal axis position of the zone main meridians different from the first azimuthal axis position is formed, thereby forming at least one zone major meridian second optical zone has a different azimuthal axis position to the zone main meridians of the first optical zone.

By means of such a specified eye lens, the vision defect of the astigmatism, which is very individually pronounced in different patients, can be corrected much better. As a result of the partial design of the individually formed and specified toric optical zones, which differ from one another at least in one parameter, even an irregular astigmatism of a human eye can be corrected in a much more detailed and need-based manner. This is done solely by the fact that no longer, as in the prior art, a flat total toric surface profile is formed on an optical side, but that individual optical zones, namely in particular completely around the main optical axis rotating and closed ring zones are formed with individual toric surface profiles. In addition, these optical zones are then not designed overall, but designed specifically especially in terms of their radial extent. This is done by the defined individual formation of the radial dimensions of the zones as a function of a constant zonal value and / or a constant azimuthal axis position of the zone main meridians. By using the parameters of the zonal refractive power and this azimuthal axis position which are also essential for the correction of the astigmatism for the relevant definition of the dimensions of the extent in the radial direction of an optical zone, the design of an optical zone in the radial direction can also be very specifying and detailed on the correction be adapted to the actual existing astigmatism of the eye to be treated. Last but not least, the invention is also considerably facilitated by the fact that the toric surface profiles of the optical zones and thus also the optical zones themselves specify or differ by different zonal refractive indices and / or different azimuthal axis positions of the zone main meridians.

In the case of an azimuthal offset of the axial position between at least one main zone meridian of the first optical zone and at least one main zone meridian of the second zone, a discrete jump is thus formed in the zone transition between the zone main meridians of the adjacent optical zones.

In general, it should be made clear that the eye lens also has an innermost optical zone whose inner zone edge has a radius approaching zero or equal to zero, but this innermost optical zone is also to be understood in the context of the invention as an annular zone or ring zone.

With regard to a toric optical zone or a toric refractive surface profile, an embodiment is meant in which there are two different refractive indices in at least main meridians and thus different curvatures, in particular different crest curves, are also formed in these directions of the main meridians.

It is preferably provided that at least one zone main meridian of the first surface profile of the first optical zone is offset in the circumferential direction about the main axis and thus in the azimuthal direction in its axial position and thus arranged with an azimuthal offset to at least one zone main meridian of the second surface profile of the second optical zone is. By this embodiment, the individualized correction of astigmatism can be further improved because again finely structured can be individually responded to the specific manifestations of astigmatism.

It may be provided in the context that the two zone major meridians of the first surface profile are arranged in the azimuthal direction at a first angle to each other, which is equal to the angle by which the two zone major meridians of the second zone are arranged relative to each other the axial position of both major zone meridians and thus of the flat and the steep zone main meridians are offset from each other. However, it may also be contemplated that the azimuthal angles at which a major flat zone meridian faces a steep zone major meridian of the first optical zone is different than this azimuth angle between the flat zone main meridian and the steep zone main meridian of the second optical zone. In these embodiments, it can then also be provided that in each case both the flat zone main meridian and the steep zone main meridian in the optical zones are offset from one another in the azimuthal direction. However, it may also be provided in these embodiments that, for example, the steep zone main meridians of the two optical zones are not offset in the azimuthal direction and thus lie in the radial direction quasi on a common in projection view straight radial line, but the steep zone main meridians in azimuthal Direction are offset from each other. However, the same can also be provided otherwise, in that the two steep zone main meridians of the two optical zones lie in the radial direction on a common radial line and the flat zone main meridians are offset in the azimuthal direction.

In a further advantageous embodiment, it is provided that the at least two zone main meridians of the first surface profile are arranged in the direction of rotation about the main axis offset from the at least two zone main meridians of the second surface profile. In this regard, already possible embodiments have been mentioned in the above advantageous embodiment.

In a preferred embodiment, all ring zones are formed on one of the two optical sides. As a result of this refinement, a highly detailed, finely adjusted correction can take place, in particular in the case of highly irregular astigmatism, since the arrangement of the zones relative to one another and their respective individual position and configuration on the optical part on the one hand and the arrangement and configuration of several toric optical zones on the other hand are improved. In particular, with regard to the different configurations of the z-refractive values and / or individual axis positions of the zone main meridians to one another and to the zone main meridians of the at least one other toric optical zone, an improved correction of an astigmatism of a human eye is possible.

It is preferably provided that a zone refractive power is a spherical refractive index and / or a cylindrical refractive index. As already explained at the outset, these specific refractive indices are essential parameters with regard to the description and correction of the astigmatism, so that precisely by this specific variation and difference of these refractive powers in the individual zones a very finely adjusted correction of the individual astigmatism of a human eye is achieved.

In a particularly advantageous manner, it is provided that the spherical refractive index and / or the cylindrical refractive index of an optical zone refer to the crest radius of the optical zone, and thus quasi the spherical peak refractive power and the cylindrical peak refractive power are taken into account.

It is advantageously provided that a radial position of a transition between two adjacent optical zones, in particular two adjacent toric optical zones, is dependent on a corneal topography of the eye to be corrected with the eye lens with respect to the visual defect astigmatism.

This embodiment is preferable in that it further increases the individual configuration of an eye lens with respect to the correction of an individual astigmatism of an eye.

In an advantageous embodiment, a step is formed between two radially adjacent optical zones, in particular toric optical zones, wherein a step height of this step corresponds to at least five times a coherence wavelength of polychromatic light, in particular white light. This embodiment is particularly advantageous in that it counteracts possible interference generation by optical path length differences on the order of the design wavelength and the possibly resulting negative influences. As a result, a possible undesired imaging property and thus an undesirable image quality of the eye lens is avoided. These very specific stages, which are formed in the direction of rotation about the main axis with at least this value in each case, raise this optical path length difference to values beyond the polychromatic coherence length of the light, whereby the diffraction effects can be greatly reduced or eliminated and the intensities of the individual zones , especially toric zones, overlap incoherently. This embodiment decouples the optical effect of the individual zones.

As a result, embodiments of an ophthalmic lens are also included which constitute a toric deep-focus lens with non-interfering annular zones.

With the invention, however, embodiments are also included in which such a specified embodiment of stages is not present, in which, however, due to the different configurations of the toric optical zones at adjacent zone edges also stages are formed, which then optionally however, they do not have the above specified step height and are thus lower. In these embodiments, it may then also occur that viewed in the direction of rotation, in particular for a subsection, the step height is also zero or virtually becomes zero at a crossing point of the zone edges. A difference or step height resulting therefrom depends in particular on the refractive difference of the adjacent zones and on the azimuthal direction or their azimuthal positions. In these embodiments, between a positive and a negative height difference, all areas can be continuously passed through to the zero difference.

In an embodiment of the eye lens it can be provided that a number m of a plurality of optical zones, each having an individually formed toric refractive surface profile, is formed. At a maximum of m-1 of these toric optical zones, at least one main zone meridian is arranged lying on a common first radial line, and in the remaining optical zones of this number m, at least one main zone meridian is located on a common, azimuthally offset first radial line Radial line arranged horizontally.

Thus, for example, it may be provided that with respect to the number m-1 of these toric zones all adjoin one another directly and the missing another toric optical zone is considered the innermost or outermost optical zone in the radial direction.

However, it can also be provided that only m-2 toric optical zones each lie at least with one zone main meridian on a common radial line and then two remaining other optical zones, in which in each case at least one zone main meridian on a different second radial line are formed so that these two remaining toric optical zones are formed directly adjacent to each other or at least one of m - 2 other optical zones are spaced apart.

It can also be provided that viewed in the radial direction, in each case a toric optical zone with a first number of the total number m is arranged alternately and subsequently follows an optical zone of the second number of the total number m of the optical zones.

It can thereby be provided that the resulting azimuthal offset of at least one zone major meridian in the azimuthal direction is the same or also varies. It can also be provided that in this regard, viewed in the azimuthal direction, an alternating arrangement of the axial positions and thus the zone main meridians occurs between two adjacent optical zones, and thus on the one hand a clockwise offset and then in the comparison of then following another optical zone Offset is formed counterclockwise.

In this connection, for example, at least some of the even-numbered toric optical zones having at least one zone major meridian may be formed on a radial line, and at least some of the odd-numbered toric optical zones each having at least one zone major meridian may be located at a different second radial line be educated.

It may also be provided that in such alternating arrangements, the azimuthal offsets of the zone principal meridians change to a center-to-center line with increasing zone number.

In one embodiment it can be provided that, at least in one optical zone, the zone main meridians are arranged at an angle not equal to 90 ° z. This also makes it possible to better take into account specific manifestations of astigmatism.

It may also be contemplated that a toric optical zone comprises at least a first major zone meridian and at least a second major zone meridian, one being a major zone major meridian and the other a major zone major meridian. It can also be provided that at least two first zone main meridians and at least two zone main meridians are formed in the azimuthal direction, or in each case at least three such flat and steep zone main meridians are present beyond that.

These may each be arranged equidistant from one another in the azimuthal direction or be arranged irregularly in this respect and thus at different azimuthal distances.

An azimuthal offset angle between two flat or two steep zone major meridians of two toric optical zones consecutive in the radial direction with respect to the zone numbering is preferably greater than 0 ° and less than 45 °.

It is preferably provided that at least one toric optical zone formed on an optical side, in particular of the Azimuth angle dependent, asphericity for correcting the spherical aberration has. In particular, it is envisaged that the asphericity of the optical zone is coupled to a surface topography of the opposite other optical side of the spherical aberration correction optical part.

It may be provided in an advantageous embodiment, that the eye lens in addition to the at least two toric optical zones at least one further, non-toric optical zone, which is thus formed without a toric refractive surface profile. By such embodiments, individual manifestations of astigmatism can be taken even better account.

It may be provided that on the optical side of the optical part on which the annular toric optical zones are not formed, a spherical surface or an aspherical surface or an entire toric surface not divided into annular optical zones is formed. It can also be provided that, in particular on this optical side, on which the annular toric optical zones are not formed, a helical turn is formed, which is preferably designed as a single circumferential turn with a particular continuous winding increase. As a result, the depth of focus of the lens can also be improved by continuously changing a refractive power starting from a start of the winding of this helix winding up to a winding end. It can also be provided that on this further side of the optical part, on which the annular toric optical zones are not formed, a multifocal surface profile is designed.

It can be provided that the surfaces of the toric optical zones are the same size. In alternative embodiments, however, it may be provided that at least one toric optical zone has a different surface area. In addition, it is also possible that the eye lens has markings that can be recognized by a medical staff, so that a correct orientation when inserting the eye lens into the eye is easy to understand and done correctly. This is particularly advantageous in an embodiment of the eye lens as an intraocular lens. It can be provided that zone main meridians are formed as a function of the marking on the optical side of the optical part, so that a corresponding relationship is also given here. By way of example, these markings can also be alignment lines, which are preferably oriented radially.

Further features of the invention will become apparent from the claims, the figures and the description of the figures. All the features and feature combinations mentioned above in the description and the features and feature combinations mentioned below in the description of the figures and / or shown alone in the figures can be used not only in the respectively indicated combination but also in other combinations or alone, without the frame to leave the invention. Thus, embodiments of the invention are to be regarded as encompassed and disclosed, which are not explicitly shown and explained in the figures, however, emerge and can be produced by separated combinations of features from the embodiments explained.

The concrete values of parameters and information on ratios of parameters or parameter values for defining exemplary embodiments of the eye lens given in the documents are also to be regarded as included within the scope of deviations, for example due to measurement errors, system errors, DIN tolerances, etc. which also includes explanations relating to essentially corresponding values and information.

Brief description of the drawings

Embodiments of the invention are explained in more detail below with reference to schematic drawings. Show it:

1a a perspective view of a first embodiment of an eye lens according to the invention;

1b a perspective view of another embodiment of an eye lens according to the invention;

2 a plan view of an embodiment of an optical side of an optical part of an eye lens with toric zones;

3 a further embodiment of a plan view of an optical side of an optical part with toric zones;

4 a perspective view of an upper side according to 3 ; and

5 a perspective view of an optical side of an optical part, in which, unlike 4 are formed between zones optical stages with a step height of at least five times the coherence wavelength over the entire circulation.

Preferred embodiment of the invention

In the figures, identical or functionally identical elements are provided with the same reference numerals.

In 1 is a perspective view of a first embodiment of an eye lens 1 shown which is an intraocular lens. The eye lens 1 includes an optical part 2 and then a touch 3 , The eye lens 1 is foldable and insertable via a small cut into an eye. The optical part 2 , which is essential for the optical imaging property of the eye lens 1 comprises a main optical axis A. The optical part 2 moreover, viewed in the direction of this main optical axis A, has a first optical surface or side 4a , which may be a front side, and opposite a second optical surface or side 4b which can be a back on. The first optical side 4a is in the implanted state of the eye lens 1 in the eye of the cornea, whereas the second optical side 4b this cornea is turned away.

In 1b is a perspective view of another embodiment of a designed as an intraocular lens eye lens 1 shown. It differs from the execution in 1a through the different haptics 3 , By means of the feel 3 is the eye lens 1 kept in mind. In principle, other shaped and designed haptics can 3 be provided. The eye lens 1 according to 1a and 1b exhibit in their optical parts 2 on the first optical side 4a and the opposite second optical side 4b vertex 4c on.

In 2 is a plan view of a first embodiment of the optical part 2 shown.

As an example, here are on the first optical page 4a a plurality of annular zones or annular optical zones 5 . 6 . 7 . 8th and 9 educated. These optical zones 5 to 9 are all completely formed circumferentially about the axis A. It is envisaged that at least one of the optical zones 5 to 9 , for example, all zones 5 to 9 , toric optical zones are. This means that they each have an individual toric refractive surface profile 5a . 6a . 7a . 8a and 9a exhibit. The first optical zone 5 includes in the exemplary embodiment two mutually perpendicular zone main meridians 5b and 5c , The radially outwardly following second optical zone 6 also includes an individual first zone major meridian 6b and a second major zone meridian offset in particular by 90 ° in the azimuthal direction 6c ,

Accordingly, this is the case with the optical zones 7 to 9 trained, so here too zone main meridians 7b . 7c . 8b . 8c . 9b and 9c are formed.

At least two surface profiles 5a to 9a are different in comparison to each other in that the optical zones 5 to 9 or the surface profiles 5a to 9a differ in the zonal value and / or in the azimuthal axis position of the main zone meridians.

In the exemplary embodiment, it is at least provided that the azimuthal axis positions differ, in this case between a zone main meridian 5b the first optical zone 5 and a zone major meridian 6b the second optical zone 6 an azimuthal offset 10 is trained. In addition, it can be seen in the embodiment that this offset 10 of the zone main meridian 6b concerning the zone main meridian 5b oriented counterclockwise. With respect to a further azimuthal offset is then in the radially outwardly adjacent further optical zone 7 provided that between the zone main meridian 5b and the zone main meridian 7b an offset 11 is formed and opposite the zone main meridian 6b a different azimuthal offset 12 is trained. The azimuthal offset 11 of the zone main meridian 7b concerning the zone main meridian 5b is oriented clockwise, which also applies to the offset 12 of the zone main meridian 7b concerning the zone main meridian 6b applies.

As well as in 2 can be seen, then in the radial direction then directly following optical zones 8th and 9 also azimuthal offsets to the zone main meridian 5b and to the respective zone major meridians of the directly adjacent zones. In order to maintain clarity, these offsets are not shown and not provided with further reference numerals.

In the exemplary embodiment, all zone major meridians are the respective optical zones 5 to 9 arranged at a 90 ° angle to each other. However, it can also be provided that in at least one zone, the respective associated zone main meridians are arranged at a different angle to each other at 90 °.

In addition, in the exemplary embodiment, it is also provided that in the radial direction the offsets are formed alternately in the clockwise direction and in the counterclockwise direction. In particular, it is also provided here that the even-numbered optical zones counted in the order from the axis A radially outward 6 and 8th so are arranged that the zone main meridians 6b and 8b on a common radial line projecting in the projection 13 lie. In particular, it is also provided in the exemplary embodiment that the zone main meridians 7b and 9b also on a different common radial line 14 lie.

Due to the above exemplary embodiment, in particular in all optical zones 5 to 9 the respective two major zone meridians are arranged at 90 ° to each other, therefore, the corresponding offset and the location on a common radial line 13 respectively 14 also for the other major zone meridians 6c to 9c to.

At the in 2 In the embodiment shown, the most varied modifications can be made with regard to the position of the zone main meridians 5b to 9b to each other and / or the zone main meridians 5c to 9c be generated. It can also be provided that the eye lens 1 with the optical part 2 according to 2 also has at least one further annular zone or annular optical zone, which is not a toric zone and thus has no individual toric surface profile. Depending on the specific astigmatism of the eye to be corrected, this non-toric zone can be arranged in the radial direction at an individual location and thus diverse. There may also be several such non-toric optical zones.

At the optical zones 5 to 9 It is provided that a toric optical zone in the radial direction in each case measures so far and thus limited to the effect that between a radially inner zone edge, for example, a zone edge 6d the optical zone 6 , and a radially outer zone edge 6e the optical zone 6 a zonal value of this optical zone 6 not altered and / or the azimuthal axis position of the zone major meridians 6b and 6c also not changed and thus remains constant. Corresponding are also the radial boundaries of the other optical zones 5 . 7 to 9 given.

Due to the different design of the toric refractive surface profiles 5a to 9a can in the direction of rotation about the axis A at the zone edges of each adjacent optical zones 5 to 9 be formed different levels, which have individual heights in the direction parallel to the axis A. In this context, step heights can also be designed with an amount of zero.

In the exemplary embodiment, all toric optical zones 5 to 9 on a first optical side 4a or on a second optical side 4b educated. On the other then opposite optical side 4b respectively 4a In particular, no such toric optical zones are formed. However, it may be provided that on this opposite optical side 4a respectively 4b then another entire toric refractive surface profile is formed, which is then not individually divided into annular zones and thus formed only in the radial direction total and thus has two zone main meridians, the straight lines in plan view and in a projection plane over their entire length are.

It can also be provided that this opposite optical side 4a respectively 4b spherical or aspheric or to produce a multifocality of the eye lens 1 is trained. It can also be provided that on this opposite optical side 4a respectively 4b a Helixwindung is formed to the depth of field of the eye lens 1 to improve or increase.

With regard to the different orientation of the zone main meridians 5b to 9c are in the individual optical zones 5 to 9 in each case a flat zone main meridian and at least one steep zone main meridian are formed. Thus it can be provided that in the example in 2 the zone main meridian 5b the flat or the steep is and the zone main meridian 5c So then each is still others. Accordingly, it can also be provided that in the other optical zones 6 to 9 the zone main meridians 6b the flat or steep is and / or zone major meridian 7b the flat or steep is and / or zone major meridian 8b the flat or steep is and / or zone major meridian 9b the flat or the steep is.

With regard to the zonal values in the optical zones 5 to 9 , by which in particular the radial extent of an optical zone 5 to 9 is limited, is the spherical refractive index and / or the cylindrical power to understand.

In the embodiment in 2 In particular, it is provided that for the correction of an irregular astigmatism at least some optical zones 5 to 9 have different values of the spherical power and / or the cylindrical power.

In addition, an alignment axis can also be used 15 be formed, which is visible by an operator or medical staff and thus also a certain correct orientation of the eye lens 1 when used in the eye is reached. In particular, the zone major meridians 5b to 9c in relation to this at least one alignment axis 15 educated.

Preferably, at least one of the optical zones 5 to 9 an azimuth angle-dependent asphericity, through which a desired correction of spherical aberration is achieved. This is in particular to the opposite optical side 4b coupled.

In a particularly advantageous embodiment, it is provided that steps between two adjacent optical zones 5 to 9 have a measured in the direction of the axis A step height, which is at least five times a coherence wavelength of polychromatic light, in particular white light. This means that in the direction of rotation about the axis A at least one such specified step height is formed at each point.

This is then another alternative, different embodiment to the previously discussed embodiment, in which steps may occur, but these are relatively arbitrary due to the different configurations of the surface profiles 5a to 9a occur. Due to the above-mentioned specific minimum step height, such a defined step height is also specified.

In 3 is another embodiment of a first optical side in another plan view 4a an optical part 2 shown. Here a different location of zone major meridians is shown absolutely and relative to each other.

It can be provided that in one embodiment of the invention all optical zones 5 to 9 , in particular all basically existing annular zones of the eye lens 1 have the same surface area. In an alternative embodiment, it can also be provided that at least two surface sizes of zones are formed differently.

It is also possible, in particular in the embodiment according to 2 in that in embodiments of an eye lens 1 the toric optical zones 5 to 9 have the same values of the spherical refractive power and / or the cylindrical refractive power and differ in the context in that the azimuthal axis positions of the zone main meridians are different. In such embodiments eye lenses are then realized, which are designed in particular for the reduction of toric alignment deviations or allow such a toric orientation more accurate and sensitive.

Preferably, it is provided in these embodiments that, in particular in the case of radially outer optical zones, for example in the optical zones 7 to 9 , the azimuthal offset between the major zone meridians of respective adjacent optical zones, preferably in an alternating manner between less than +/- 10 °, in particular for example +/- 5 °, to the zone principal meridian of the first innermost zones 5 is.

In 4 is a perspective view of an embodiment of a first optical side 4a shown at which levels between adjacent zones no minimum step height, as mentioned above, but depending on the individual design of the toric surface profile, the step height 16 can vary widely in the direction of circulation. It can therefore also sink to the value 0.

In 5 In contrast, a representation is shown in perspective view, in which step heights 17 in the direction of rotation about the axis A in each case at least five times the coherence wavelength of polychromatic light, in particular white light, are. The step heights 16 in 4 as well as the step heights 17 in 5 are drawn in only a few places, to the clarity in the 4 and 5 to preserve.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102005028933 A1 [0005]
• AT 507873 A2 [0007]
• AT 507874 A2 [0007]

Claims (10)

Eye Lens ( 1 ) with an optical part ( 2 ), one in the direction of a major optical axis (A) of the eye lens ( 1 ) considers first optical side ( 4a ) and an opposite second optical side ( 4b ), and a plurality of around the main optical axis (A) encircling, on at least one optical side ( 4a . 4b ) formed, annular optical zones ( 5 . 6 . 7 . 8th . 9 ), characterized in that a first optical zone ( 5 . 6 . 7 . 8th . 9 ) a first toric refractive surface profile ( 5a . 6a . 7a . 8a . 9a ) with at least two major zone meridians ( 5b . 5c ; 6b . 6c ; 7b . 7c ; 8b . 8c ; 9b . 9c ) and at least one second optical zone ( 5 . 6 . 7 . 8th . 9 ) a second toric refractive surface profile ( 5a . 6a . 7a . 8a . 9a ) with at least two major zone meridians ( 5b . 5c ; 6b . 6c ; 7b . 7c ; 8b . 8c ; 9b . 9c ), wherein at least the first optical zone ( 5 . 6 . 7 . 8th . 9 ) and the second optical zone ( 5 . 6 . 7 . 8th . 9 ) in the radial direction of the optical part ( 2 ) are each limited by the fact that between a radially inner zone edge ( 6d ) and a radially outer zone edge ( 6e ) of the respective optical zone ( 5 . 6 . 7 . 8th . 9 ) a zone refractive index is unchanged and / or the azimuthal axis position of the zone main meridians ( 5b . 5c ; 6b . 6c ; 7b . 7c ; 8b . 8c ; 9b . 9c ) to each other the respective optical zone ( 5 . 6 . 7 . 8th . 9 ) is unchanged, and the first optical zone ( 5 . 6 . 7 . 8th . 9 ) a first zoned value and the second optical zone ( 5 . 6 . 7 . 8th . 9 ) has a different second z-value and / or the first optical zone ( 5 . 6 . 7 . 8th . 9 ) a first azimuthal axis position of the zone main meridians ( 5b . 5c ; 6b . 6c ; 7b . 7c ; 8b . 8c ; 9b . 9c ) and the second optical zone ( 5 . 6 . 7 . 8th . 9 ) a second azimuthal axis position of the zone main meridians, which is different from the first azimuthal axis position ( 5b . 5c ; 6b . 6c ; 7b . 7c ; 8b . 8c ; 9b . 9c ) having. Eye Lens ( 1 ) according to claim 1, characterized in that at least one zone main meridian ( 5b . 5c ; 6b . 6c ; 7b . 7c ; 8b . 8c ; 9b . 9c ) of the first surface profile ( 5a . 6a . 7a . 8a . 9a ) of the first optical zone ( 5 . 6 . 7 . 8th . 9 ) in the axial direction about the main axis (A) in its axial position azimuthally offset to at least one zone main meridian ( 5b . 5c ; 6b . 6c ; 7b . 7c ; 8b . 8c ; 9b . 9c ) of the second surface profile ( 5a . 6a . 7a . 8a . 9a ) of the second optical zone ( 5 . 6 . 7 . 8th . 9 ) is arranged. Eye Lens ( 1 ) according to claim 1 or 2, characterized in that the at least two zone main meridians ( 5b . 5c ; 6b . 6c ; 7b . 7c ; 8b . 8c ; 9b . 9c ) of the first surface profile ( 5a . 6a . 7a . 8a . 9a ) in the direction of rotation about the major axis (A) offset to the at least two major zone meridians ( 5b . 5c ; 6b . 6c ; 7b . 7c ; 8b . 8c ; 9b . 9c ) of the second surface profile ( 5a . 6a . 7a . 8a . 9a ) are arranged. Eye Lens ( 1 ) according to any one of the preceding claims, characterized in that all annular, a toric refractive surface profile having optical zones ( 5 . 6 . 7 . 8th . 9 ) on the first and / or second optical side ( 4a . 4b ) are formed. Eye Lens ( 1 ) according to one of the preceding claims, characterized in that a zonal power value is a spherical refractive power and / or a cylindrical refractive power. Eye Lens ( 1 ) according to one of the preceding claims, characterized in that between two radially adjacent zones ( 5 . 6 . 7 . 8th . 9 ) a step ( 17 ) is formed and the step height corresponds at all points in the direction of rotation about the major axis (A) at least five times the coherence wavelength of polychromatic light. Eye Lens ( 1 ) according to one of the preceding claims, characterized in that m optical zones ( 5 . 6 . 7 . 8th . 9 ) an individual toric refractive surface profile ( 5a . 6a . 7a . 8a . 9a ) and at a maximum of m - 1 optical zones ( 5 . 6 . 7 . 8th . 9 ) at least one zone main meridian ( 5b . 5c ; 6b . 6c ; 7b . 7c ; 8b . 8c ; 9b . 9c ) on a common first radial line ( 13 ), and in the remaining optical zones ( 5 . 6 . 7 . 8th . 9 ) of the m optical zones ( 5 . 6 . 7 . 8th . 9 ) at least one zone main meridian ( 5b . 5c ; 6b . 6c ; 7b . 7c ; 8b . 8c ; 9b . 9c ) on a common, to the first radial line ( 13 ) azimuthally offset second radial line ( 14 ) lies. Eye Lens ( 1 ) according to one of the preceding claims, characterized in that at least in one optical zone ( 5 . 6 . 7 . 8th . 9 ) the zone main meridians ( 5b . 5c ; 6b . 6c ; 7b . 7c ; 8b . 8c ; 9b . 9c ) are arranged at an angle not equal to 90 ° to each other. Eye Lens ( 1 ) according to one of the preceding claims, characterized in that at least one on an optical side ( 4a . 4b ) formed optical zone ( 5 . 6 . 7 . 8th . 9 ) has an asphericity, in particular an azimuth angle, for correcting the spherical aberration, in particular the asphericity of the optical zone ( 5 . 6 . 7 . 8th . 9 ) with the surface topography of the other optical side ( 4a . 4b ) coupled to correct the spherical aberration. Eye Lens ( 1 ) according to one of the preceding claims, characterized in that the eye lens ( 1 ) at least one further optical zone without having a toric refractive surface profile.

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