Spectacle lens for managing myopia by means of a dual progression control process

Abstract

In particular, the invention relates to a spectacle lens (10) which comprises: a central main viewing region (20) with a substantially constant refractive power; and a functional region (18; 19) which adjoins the central main viewing region (20) on both sides at least horizontally and which has an additional functional effect in comparison to the central main viewing region (20), said additional functional effect having at least one additional dioptric effect and / or a contrast reduction in comparison to the central main viewing region (20), wherein the additional functional effect in the active region (18, 19) is produced by a combination of at least one first surface structure characteristic and a second surface structure characteristic, which differs from the first surface structure characteristic in particular, of the spectacle lens (10).

Description

[0001] Myopia management lens with dual progression control

[0002] Description

[0003] The invention relates to a spectacle lens with a special distribution of additional optical effects to improve long-term wearing comfort with simultaneous improved perception.

[0004] Myopia management refers to the attempt to control abnormal longitudinal growth of the eye, particularly in children and adolescents, which leads to severe myopia and is caused, among other things, by a modern lifestyle (little time outdoors and a lot of close work). One possible approach to controlling the progression of myopia is wearing special lenses that attempt to pull the focal plane of the visual field in the periphery in front of the retina, thus slowing the longitudinal growth of the eye.

[0005] One possibility is spectacle lenses with a design similar to progressive lenses, which bring the focal plane in the peripheral field of vision in front of the retina through an additional power. (e.g. US 7,025,460, EP 1 934 648 B1 , WO 2017 / 222421 A1 , DE 10 2009 053 467 B4 ). Other variants of spectacle lenses have a multitude of small additional power elements (lenslets, etc.) distributed across the spectacle lens and create a second focal plane in front of the retina. (e.g. CN 104678572 B, US 10268050 B2, WO 2019 / 166653 A1 , US 8950860 B2, US 10901237 B2, US 11061255 B2). Another possibility is the introduction of small scatterers that reduce the contrast in the periphery and thus inhibit the progression of myopia (e.g. WO 2018 / 026697 A1 ).

[0006] What all these lenses have in common is that they have a central zone that provides good vision due to a prescription with a corresponding corrective power, and a peripheral zone that does not provide good vision due to myopia management measures (lenslets, power increase, or divergers). The size of the central zone is crucial for the tolerability of the glasses, while the size and power of the peripheral power zone is crucial for the success of myopia management. The relationship between the two zones is usually determined by the lens design and is the same for all corrective powers. Suggestions for adapting the zones to the individual eye are described, for example, in EP 3 966 626 A1. These are based on additional measurements, either as peripheral refraction or using a psychophysical procedure.

[0007] To date, various optical effects regarding the tolerability and comfort of ophthalmic lenses, especially spectacle lenses, have been investigated with regard to their influence on myopia and / or hyperopia, as well as their progression or development, depending on the optical and physiological mechanisms that are intended to explain or slow down such progression or advancement, particularly worsening. Existing approaches are essentially based on projecting the image in front of the retina, as this is intended to slow the longitudinal growth of the eye. It has been shown that it is sufficient (or even better) if this occurs only in the periphery of the retina.

[0008] Especially with lenses for correcting myopia, the often noticeable tendency for myopia to progress leads to a reduction in the wearing comfort of once fitted lenses and thus also in the wearer's satisfaction and the tolerability of the glasses after a short time.

[0009] One object of the present invention is to improve the lasting compatibility of spectacles or spectacle lenses and thus achieve long-term wearing comfort at low cost. This object is achieved according to the invention by the subject matter of the independent claims. Preferred embodiments are the subject matter of the dependent claims.Thus, in one aspect, the invention relates in particular to a spectacle lens which comprises a central main viewing area with a substantially constant refractive power and preferably a substantially constant image contrast and a functional area which is preferably adjacent to the central main viewing area at least horizontally on both sides and which, compared to the central main viewing area, has an additional functional effect which comprises at least an additional dioptric effect and / or a contrast reduction compared to the central main viewing area, wherein the additional functional effect in the functional area is brought about by a combination of at least one first surface structure characteristic and a second surface structure characteristic (different from the first surface structure characteristic) of the spectacle lens.

[0010] It is precisely by combining different functional effects through different structural characteristics of the lens for myopia management that a high degree of effectiveness in reducing myopia progression can be achieved, while still keeping undesirable side effects of the individual measures comparatively low. Such undesirable side effects of conventional lenses for myopia management are well known and are always kept within acceptable limits by striving to strike a balance between effectiveness and tolerability. This is achieved, in particular, through appropriate distribution and expression of the respective effect.

[0011] However, through the inventive combination of different effects, this compromise can be made significantly more favorably in favor of a myopia-stopping effect, without significantly increasing the individual undesirable side effects. It is well known that spectacle lenses similar to progressive lenses with a peripheral power increase (i.e., a peripheral dioptric additional power) impair peripheral vision due to this additional effect and exhibit the typical additional disadvantages of progressive lenses (e.g., astigmatism in the lens, distortion, rocking effects). Spectacle lenses with microlenses (lenslets) limit vision, particularly through reduced contrast and secondary images.Through the inventive combination of such different mechanisms of action, their effectiveness for myopia management can be enhanced or complemented, while the individual undesirable side effects can be kept relatively low. It has been shown, in particular, that it is advantageous for the tolerability of a spectacle lens to keep such undesirable side effects to a minimum, even if several different side effects occur simultaneously. Conversely, the invention thus offers the possibility of increasing the effectiveness of spectacle lenses for myopia management compared to conventional lenses, while simultaneously maintaining tolerability.

[0012] The first and / or second surface structure characteristic is understood to mean, in particular, a surface shape or surface effect that deviates from a pure or simple spherical shape or effect, preferably also from an astigmatic surface shape or effect. In one aspect, the optical effect of the first and / or second surface structure characteristic deviates from a surface for pure vision correction.

[0013] Preferably, the first and / or second surface structure characteristic comprises: a progressive surface refractive power; and / or a microlens arrangement (microlens field); and / or a contrast reduction.

[0014] The progressive surface refractive power is achieved in particular by a continuous free-form surface of the spectacle lens, wherein the surface curvature of the front and / or rear surface of the spectacle lens is continuously changed from the central main visual area to the functional area or within the functional area in such a way that the functional area at least partially causes a higher refractive power than the essentially constant refractive power in the central main visual area, so that the part of the light that passes through this functional area is imaged in front of the retina in order to counteract the longitudinal growth of the eye. In other words, the progressive surface refractive power of the first and / or second surface structure characteristic preferably at least partially causes a positive dioptric additional effect, i.e.the refractive power in the functional area is then preferably at least partially less negative or more positive than in the central main viewing area.

[0015] In particular, the first and / or the second surface structure characteristic is designed as microstructures, in particular as microlenses (in particular knobs on the lens body, also called lenslets), so that the part of the light passing through these microlenses (lenslets) is imaged in front of the retina in order to counteract the longitudinal growth of the eye. For this purpose, the lenslets preferably have a positive dioptric additional power. Such lenslets can be both classic circular lenslets (e.g. CN 104678572 B), as well as astigmatic (WO 2019 / 166653 A1) or even ring-shaped structures (WO 2021 / 047488 A1), in particular anything that has a discontinuity between the basic power and the (small) structural elements and produces a corresponding additional power.

[0016] As a further possibility for the first and / or second surface structure characteristic, spectacle lenses with scatterers (e.g. WO 2019 / 152428 A1) could preferably be used to bring about a reduction in contrast. A reduction in contrast is brought about in particular by a diffuser structure (light scatterer) as the first and / or second surface structure characteristic. In one aspect, microstructures in the functional area at least partially bring about the reduction in contrast. For this purpose, the microstructures preferably comprise surface roughnesses which cause a dullness of the optical image. This dullness then leads to a reduction in contrast. The central main field of view preferably remains essentially clear, while the reduction in contrast is only generated in the functional area. This reduction in contrast contributes to the fact that the corresponding (peripheral) field of vision provides no or less incentive for longitudinal growth of the eye.This contrast reduction is particularly effective if the resulting perception (or degree of perception) in the range of contrast reduction is in the range of at least about 0.5, preferably in the range of at least about 0.7. Preferably, the perception due to the contrast reduction is not greater than about 0.9, even more preferably not greater than about 0.8.

[0017] Perception should be understood here in particular as the factor by which the visual acuity (i.e. visual acuity) is reduced, whereby in particular a visual acuity determined to the value 1 in accordance with DIN 58220 Part 3 is assumed as the reference. Thus, a perception of 0 (<0.1) means essentially complete occlusion and 1 in principle means complete transparency. These properties arise in particular when the spectacle lens is arranged in a position with a typical corneal vertex distance (HSA), i.e. in particular with at least one value of the HSA in the range from approximately 11 mm to approximately 18 mm, particularly preferably with at least one value of the HSA of approximately 13 mm or approximately 14 mm.

[0018] Alternatively or in addition to adhering to the value ranges for perception proposed here, it may be particularly preferred if the contrast reduction caused by the microstructure in the effective area leads to a haze value (in particular % haze) according to the ASTM D-1003 standard in the range of not more than about 10, preferably in the range of not more than about 2, and wherein preferably the contrast reduction caused by the microstructure in the effective area leads to a haze value according to the ASTM D-1003 standard in the range of at least about 0.1, in particular at least about 0.5.

[0019] Particularly preferably, in the event of a reduction in contrast, the effective area still has a transmission (in particular a luminous transmittance value according to the ASTM D-1003 standard) of at least 85, even more preferably at least 90. This ensures that even in the event of a reduction in contrast, the spectacle lens does not completely block the light (e.g. absorb and / or reflect it) and thus darken the field of vision, but that the light is only (partially) scattered. This largely retains the impression of brightness and prevents the pupil from becoming noticeably larger (due to reduced light incidence). The values ​​for both haze and luminous transmittance according to the ASTM D-1003 standard can be determined or checked, for example, using the “haze-gard plus” measuring device from BYK Additives and Instruments.

[0020] All combinations of the described or other approaches would be possible, whereby a combination of lenslets or scatterers with a freeform surface is particularly preferred, since then the different optical errors (discontinuities and non-coaxial areas on the one hand, large-area increase in effect and distortion on the other hand) each have a different effect on the visual perception.

[0021] Thus, in a particularly preferred embodiment, the first surface structure characteristic comprises microstructures, in particular in the form of microlenses (lenslets), which produce a first positive dioptric additional effect compared to the central main field of vision, wherein the second surface structure characteristic comprises in particular a progressive surface refractive power which produces a second positive dioptric additional effect compared to the central main field of vision.

[0022] In a further, particularly preferred embodiment, the first surface structure characteristic comprises optical scatterers which bring about a reduction in contrast compared to the central main viewing area, wherein the second surface structure characteristic comprises a progressive surface refractive power which brings about a second positive dioptric additional effect compared to the central main viewing area.

[0023] In particular, it would also be possible to combine three different surface structure characteristics and thus allow them to interact, or to combine several effects (e.g. microlenses and optical scatterers) as the first surface structure characteristic and thus allow them to interact.

[0024] The first and second surface structure characteristics can interact in various ways. Depending on the embodiment, the different surface structure characteristics can at least partially divide the functional area in such a way that in some areas (i.e., for some viewing points), one surface structure characteristic predominantly or solely dominates or provides the functional effect for myopia control, while alternatively or additionally, in other areas, the other surface structure characteristic predominantly or solely dominates or provides the functional effect for myopia control. Alternatively or additionally, it is also possible for the first and second surface structure characteristics to jointly effect the functional effect at least in parts (i.e., for some viewing points) of the functional area.

[0025] In a particularly preferred embodiment, the first surface structure characteristic is formed on the front surface of the spectacle lens and the second surface structure characteristic is formed on the rear surface of the spectacle lens. Such spectacle lenses can be manufactured particularly easily, wherein the first and second surface structure characteristics can interact efficiently without adversely affecting one another. The “front surface” and “rear surface” of the spectacle lens are understood in particular to mean the front surface and rear surface of a spectacle lens base body. This does not always have to correspond to one of the surfaces of the finished spectacle lens. Rather, it is also possible for the spectacle lens base body (e.g. after the front and / or rear surface has been formed) to be provided with one or more coatings.Such coatings may include, for example, protective coatings, topcoats, hard coatings, color coatings, anti-reflective coatings, anti-fog coatings, etc.

[0026] In a preferred embodiment, the functional region comprises at least one combination effect region such that, for each viewing point of the spectacle lens within the combination effect region, the functional effect is brought about by the combination of the first and the second surface structure characteristic. Alternatively or additionally, in a preferred embodiment, the functional region comprises at least a first and / or a second exclusive effect region such that, for each viewing point of the spectacle lens within the first or second exclusive effect region, the functional effect is brought about solely by the first or the second surface structure characteristic. In other words, it is preferred in one embodiment if, for example, the second surface structure characteristic is not effective oris not present and / or if the first surface structure characteristic is not effective or is not present in a second exclusive area of ​​effect.

[0027] This allows the undesirable side effects that are particularly critical (i.e., less tolerable) for certain areas of use (i.e., the field of vision) of the spectacle lens to be selectively suppressed very efficiently without impairing the functional effect of myopia control. Thus, in a preferred embodiment, the central main viewing area is completely surrounded by a first exclusive power area, which is followed by a combined power area. The first surface structure characteristic particularly preferably comprises microlenses, while the second surface structure characteristic particularly comprises a progressive surface refractive power.

[0028] For example, it can be particularly advantageous to initially use only (or predominantly) microstructures (e.g. microlenses / lenslets) directly adjacent to the main visual field to create the functional effect (particularly in the form of a positive dioptric additional power), and to supplement or (partially) replace their effect towards the periphery of the lens with an increase in a progressive sphere refractive power (positive dioptric additional power). This enables an effective and highly efficient functional effect for myopia management even near the central main visual field, while the slower increase in sphere refractive power allows astigmatic side effects to be kept to a minimum. At the same time, the formation of secondary images is minimized or suppressed, particularly in the peripheral region.In a preferred embodiment, the spectacle lens comprises: a continuous channel region which extends continuously from an upper edge to a lower edge of the spectacle lens and comprises the central main viewing area; and a combination power area which borders the continuous channel region horizontally on both sides and extends continuously from the upper to the lower edge of the spectacle lens, wherein an additional dioptric power of the spectacle lens caused by the second surface structure characteristic increases away from the channel region on both sides of the channel region.

[0029] In this embodiment, it is particularly preferred if the channel region comprises a first upper and a first lower exclusive power region, in which the additional power is generated essentially by the first surface structure characteristic, which in particular comprises microlenses, while the second surface structure characteristic comprises a progressive surface refractive power (with positive dioptric additional power).

[0030] Compared to lenses whose central zone is completely surrounded by a positive effect due to a progressive surface power, this variant with only lateral progression of the surface power improves tolerability due to the significant reduction of distortion in all directions. This is despite the functional effect of the first surface structure characteristic (e.g., in the form of microlenses) being very efficiently implemented in all directions, thus also providing very effective myopia control. This achieves high tolerability while simultaneously providing good suppression of myopia progression.

[0031] The directions “bottom” and “top” (and terms derived from them such as “below” and “above”) as well as terms for the directions “nasal”, “temporal”, “horizontal” and “vertical” are always seen in this description in relation to the position of use of the spectacle lens, which is determined in particular by the centration data for the spectacle lens. In this case, the “lower” and “upper” edges of the spectacle lens are preferably understood to mean an edge section of a lower or upper half, more preferably a lower or upper third, even more preferably a lower or upper quarter, of a spectacle lens surface (front surface and / or back surface) of the spectacle lens. Particularly preferably, an upper or lower edge designates in particular a section of the edge of the entire spectacle lens which delimits the uppermost or lowermost 20%, preferably 15%, even more preferably 10%, most preferably 5%, of the vertical height of the spectacle lens.The spectacle lens referred to in this description can in particular be an already edged or ground (finished) spectacle lens or a raw round spectacle lens.

[0032] In a further aspect, the invention relates to a method for producing a spectacle lens, in particular one of the spectacle lenses described here, wherein the method comprises generating the first surface structure characteristic on a front surface of the spectacle lens and generating the second surface structure characteristic on a rear surface of the spectacle lens. This is particularly preferred if the first surface structure characteristic is generated during the casting of a spectacle lens semi-finished product and in particular comprises microlenses. Alternatively or additionally, it is particularly advantageous if the second surface structure characteristic is generated by grinding the rear surface and in particular comprises a progressive surface refractive power.

[0033] Finally, the invention relates to a use of one of the spectacle lenses described here for compensating a myopic refractive error and / or for reducing the progression of myopia.

[0034] The invention will be further described below using preferred embodiments with reference to the accompanying drawings.

[0035] Fig. 1 is a schematic representation of individual areas on a spectacle lens according to a preferred embodiment; Fig. 2 is a schematic representation of an exemplary

[0036] Refractive power distribution as a second surface structure characteristic in a spectacle lens according to a preferred embodiment;

[0037] Fig. 3 is a schematic cross-sectional view of a spectacle lens front surface illustrating microlenses as an example of a first surface structure characteristic in a spectacle lens according to a preferred embodiment; and

[0038] Fig. 4 is a schematic representation of an exemplary distribution of

[0039] Microlenses as the first surface structure characteristic in a spectacle lens according to a preferred embodiment.

[0040] A preferred embodiment of a myopia control lens with dual progression control combines the "lenslets" and "peripheral power increase" approaches, with the "lenslets" approach located on the front surface of the lens and the "peripheral power increase" approach located on the back surface of the lens. Exemplary implementations of this preferred embodiment are described below with reference to Figures 1 to 4:

[0041] Fig. 1 shows a schematic distribution of individual regions on a spectacle lens 10 according to a preferred embodiment. In particular, the spectacle lens 10 comprises a central main viewing region 20 with a substantially constant refractive power. In this embodiment, the central main viewing region 20 is surrounded by a functional region, which in this case comprises an exclusive power region 19 and a combination power region 18. Compared to the central main viewing region 20, the functional region 18, 19 has an additional functional effect, which in the preferred embodiment shown here comprises at least one additional dioptric effect compared to the central main viewing region 20. The additional functional effect in the functional region 18, 19 is brought about by a combination of a first surface structure characteristic and a second surface structure characteristic of the spectacle lens 10.

[0042] In the embodiment illustrated here, the first surface structure characteristic is formed in particular by microlenses, which provide at least part of the additional dioptric power compared to the central main viewing area 20. The second surface structure characteristic is formed in particular by a progressive surface refractive power, which in turn also provides at least part of the additional dioptric power compared to the central main viewing area 20. Particularly preferably, in this embodiment, the first surface structure characteristic is formed on the front surface and the second surface structure characteristic is formed on the rear surface of the spectacle lens 10.

[0043] In particular, in the exclusive power range 19, the functional effect is generated essentially only by the first surface structure characteristic, while in the combination power range 18, the functional effect is generated by both surface structure characteristics together (i.e., in sum). In other words, within the exclusive power range 19, preferably essentially no progressive surface refractive power contributes to the positive dioptric additional power of the functional effect. In particular, in the exclusive power range 19, a progressive surface refractive power contributes no more than approximately 20%, preferably no more than approximately 10%, most preferably no more than approximately 5%, to the positive dioptric additional power.Preferably, within the combination power range 18, each of the two surface structure characteristics contributes at least about 10%, more preferably at least about 20%, most preferably at least about 25% to the positive dioptric additional power.

[0044] While the exclusive action region 19 in this preferred embodiment completely surrounds the central main viewing region 20, the combination action region 18 adjoins the exclusive action region 19 laterally on both sides. Thus, in the exemplary embodiment shown, the exclusive action region 19 and the central main viewing region 20 together form a continuous channel region. This channel region is thus a region that, in this embodiment, is essentially free of the second surface structure characteristic. In Fig. 2, which will be described below, this channel region is represented by the reference numeral 12.

[0045] The channel region 12 extends continuously from an upper edge 14 of the spectacle lens 10 to a lower edge 16 of the spectacle lens 10. This channel region 12 is surrounded nasally and temporally by a respective nasal effective section 18n and temporal effective section 18t of the combination effective region 18, which in particular directly border the channel region 12 along a respective nasal channel boundary line 26n and temporal channel boundary line 26t (Fig. 2).

[0046] Fig. 2 shows a schematic representation of an exemplary variation in the refractive power distribution due to the second surface structure characteristic, implemented particularly on the back surface, in the form of a progressive surface refractive power in a spectacle lens 10 according to a preferred embodiment. This schematic representation could fundamentally correspond in particular to a spectacle lens 10 from Fig. 1. Here, the channel region 12 extends from the upper edge 14 of the spectacle lens 10 to the lower edge 16 of the spectacle lens. The nasal effective section 18n and the temporal effective section 18t border this channel region 12 laterally.

[0047] The lines shown in Fig. 2 in addition to the entire edge contour of the spectacle lens represent lines (isolines) of equal surface refractive power on the rear surface of the spectacle lens 10. For example, the refractive power distances between adjacent lines in Fig. 2 could each indicate a difference of 0.5 dpt. As can be seen from this, the entire channel region 12 lies in a region with essentially constant surface refractive power. For the entire spectacle lens 10, this means that either the overall refractive power of the spectacle lens is essentially constant (as is particularly the case in the central main vision region 20) or the functional effect is determined by the first surface structure characteristic (as is the case in the exclusive power region 19).

[0048] Regardless of the absolute value of the refractive power, the spectacle lens 10 preferably has the lowest refractive power in the channel region 12 in the illustration of Fig. 2. Towards the lateral power sections 18n, 18t, the surface refractive power then increases steadily due to the second surface structure characteristic and, in the schematic illustration, reaches its respective maximum at approximately mid-height in the region of the lateral edges of the spectacle lens 10.

[0049] The rear surface is designed, in particular, using freeform technology. This provides the lens 10 with the power required to correct distance vision in the channel region 12, particularly in the central main vision region 20. A power increase is incorporated in the lateral peripheral zones, particularly in the combination power region 18, so that the second surface structure characteristic provides the lens with, for example, an additional power of 2.5 dpt (second positive dioptric additional power) temporally at approximately 25 mm from a center point of the central main vision region 20, and an additional power of 2.0 dpt (second positive dioptric additional power) nasally at approximately 25 mm from the center point of the central main vision region 20.In the vertical direction, the channel area extends essentially without any additional effect due to the second surface structure characteristic, while a medium increase in effect can be seen at the top and bottom sides.

[0050] Particularly preferably, the maximum refractive power of the rear surface of the lens in the nasal and temporal power ranges differ from one another by no more than approximately 3 dpt, preferably no more than approximately 2 dpt, even more preferably no more than approximately 1 dpt, and most preferably no more than approximately 0.5 dpt. Alternatively or simultaneously, depending on the embodiment and area of ​​application, the maximum refractive power of the rear surface of the lens in both the nasal and temporal power ranges is at least approximately 1 dpt, preferably at least approximately 1.5 dpt, further preferably at least approximately 2 dpt, even more preferably at least approximately 2.5 dpt, and most preferably at least approximately 3 dpt, greater than the minimum refractive power of the rear surface of the lens in the canal region 12.

[0051] In a preferred embodiment, the first surface structure characteristic is realized in particular by microstructures on the front surface of the spectacle lens. As shown by way of example in Fig. 3, the microstructures are designed in particular as microlenses 30 (in particular knobs on the spectacle lens body) to image the portion of the light passing through these microlenses (lenslets) in front of the retina in order to counteract the longitudinal growth of the eye. For this purpose, the lenslets 30 preferably have a positive dioptric additional power (first positive dioptric additional power). For example, an additional power of approximately 3.5 dpt has proven to be effective. Other powers (e.g., 2 to 5 dpt) are equally possible and should produce a similar effect. The optical effect of the knobs is created by the refraction at the interface between the spectacle lens body and the environment (e.g., air or a protective layer in the area of ​​the knobs).

[0052] The term "lenslets" refers in particular to small, particularly circular areas on the front surface of the lens 32, which differ in power from the area around these elements, the so-called basic power. This effect is achieved by a modified curvature of the front surface in this area. The lenslets have, for example, a diameter of approximately 1 mm, as well as a power that differs from the basic power by approximately 3.5 dpt (first positive dioptric additional power), and are particularly preferably arranged according to the Fibonacci sphere distribution (see Fig. 4) around the central main viewing area 20, wherein the central main viewing area 20, with a preferred diameter in the range of approximately 5 mm to approximately 20 mm, preferably in a range of approximately 10 mm to approximately 15 mm, preferably remains free of lenslets for good central vision.The lenslets are preferably already included in the molds of the semi-finished ophthalmic lens products.

[0053] In summary, one idea of ​​the present invention is to combine two approaches to myopia management lenses. The myopia management lens with such dual progression control thus incorporates two designs for myopia control and, for example, has a multitude of additional power elements (microlenses or lenslets) on the front surface and a rear surface that provides an additional power in the periphery (e.g., as a progressive surface refractive power).

[0054] The different lens designs for myopia control have different optical disadvantages. By combining the designs, different optical errors are combined, preventing a dominant error from occurring that would overly impair tolerability. This allows for more of the effect to be directed toward the retina. The invention thus achieves greater effectiveness for myopia control by increasing the effect to the retina, while simultaneously improving tolerability through an adapted distribution of the optical errors.

[0055] List of reference symbols

[0056] 10 lenses

[0057] 12 channel area

[0058] 14 upper edge

[0059] 16 lower edge

[0060] 18n nasal effect section

[0061] 18t temporal effective period

[0062] 20 central main viewing area

[0063] 26n nasal canal border line

[0064] 26t temporal canal boundary line

[0065] 30 microlenses (lenslets)

[0066] 32 front surface of the lens

Claims

Patent claims 1. A spectacle lens (10) comprising: a central main viewing region (20) having a substantially constant refractive power; and a functional region (18, 19) horizontally adjacent to the central main viewing region (20) on both sides, which functional region has an additional functional effect compared to the central main viewing region (20), which additional functional effect comprises at least one additional dioptric effect and / or a contrast reduction compared to the central main viewing region (20), wherein the additional functional effect in the functional region (18, 19) is brought about by a combination of at least one first surface structure characteristic and a second surface structure characteristic of the spectacle lens (10).

2. Spectacle lens (10) according to claim 1, wherein the first and / or second surface structure characteristic comprises: a progressive surface refractive power; and / or a microlens arrangement; and / or a contrast reduction.

3. Spectacle lens according to one of claims 1 or 2, wherein the first surface structure characteristic comprises microlenses that produce a first positive dioptric additional power compared to the central main viewing area (20); and wherein the second surface structure characteristic comprises a progressive surface refractive power that produces a second positive dioptric additional power compared to the central main viewing area (20).

4. Spectacle lens according to one of claims 1 to 3, wherein the first surface structure characteristic comprises optical scatterers which bring about a reduction in contrast compared to the central main field of vision (20); and wherein the second surface structure characteristic comprises a progressive surface refractive power which brings about a second positive dioptric additional effect compared to the central main field of vision (20).

5. Spectacle lens according to one of the preceding claims, wherein the first surface structure characteristic is formed on the front surface of the spectacle lens and the second surface structure characteristic is formed on the rear surface of the spectacle lens.

6. Spectacle lens according to one of the preceding claims, wherein the functional region (18, 19) comprises at least one combination effect region (18) such that for each viewing point of the spectacle lens within the combination effect region, the functional effect is brought about by the combination of the first and the second surface structure characteristic.

7. Spectacle lens according to one of the preceding claims, wherein the functional region comprises at least a first and / or a second exclusive effect region (19) such that for each viewing point of the spectacle lens within the first or second exclusive effect region (19) the functional effect is brought about solely by the first or by the second surface structure characteristic.

8. Spectacle lens according to claim 7 as dependent on claim 6, wherein the central main viewing area (20) is completely surrounded by a first exclusive action area (19), which is adjoined by a combination action area (18).

9. Spectacle lens (10) according to claim 6 or a claim dependent thereon, comprising: a continuous channel region (12) extending continuously from an upper edge (14) to a lower edge (16) of the spectacle lens and comprising the central main viewing area; and a horizontally connected to both sides of the continuous channel region (12) adjacent and continuously extending from the upper (14) to the lower edge (16) of the spectacle lens (10), wherein an additional dioptric effect of the spectacle lens (10) caused by the second surface structure characteristic increases on both sides of the channel area away from the channel area (12).

10. Spectacle lens (10) according to claim 9, wherein the channel region comprises a first upper and a first lower exclusive effect region, in which the additional effect is generated substantially by the first surface structure characteristic, which in particular comprises microlenses.

11. A method for producing a spectacle lens according to any one of the preceding claims, comprising: Creating the first surface structure characteristic on a front surface of the spectacle lens; and Creating the second surface structure characteristic on a back surface of the spectacle lens.

12. The method according to claim 11, wherein the first surface structure characteristic is produced during the casting of a spectacle lens semi-finished product and in particular comprises microlenses (30).

13. The method according to claim 11 or 12, wherein the second surface structure characteristic is produced by grinding the back surface and in particular comprises a progressive surface refractive power.

14. Use of a spectacle lens according to one of claims 1 to 10 for correcting myopic refractive error.

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