EYEGLASS LENS FOR MYOPIA MANAGEMENT BY MEANS OF PERIPHERAL INTENSITY ENHANCEMENT

Description

[0001] The invention relates to a spectacle lens with at least one specially shaped peripheral area with different optical properties to improve long-term wearing comfort while simultaneously improving perception.

[0002] Especially with spectacle lenses for the correction of myopia, the often noticeable tendency of a progression of myopia leads to a decrease in the wearing comfort of once fitted spectacle lenses, and thus also in the satisfaction of the spectacle wearer and the tolerability of the glasses, after a short time.

[0003] Myopia is increasing dramatically worldwide, particularly in Asia. The WHO estimates that over 50% of the world's population will be myopic by 2050. As an individual's myopia increases, so does the risk of related eye diseases such as retinal detachment, glaucoma, cataracts, and macular degeneration. Therefore, there is a strong interest in slowing the progression of myopia. Several approaches exist to slow myopia progression using optical aids (vision aids). However, all these approaches are complex, expensive, and inflexible, making it difficult to adapt to rapidly changing circumstances (e.g., changes in eyeglass prescriptions or visual system requirements).

[0004] Various optical effects of ophthalmic lenses, particularly spectacle lenses, have been investigated regarding their tolerability and comfort, specifically 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 progression, especially deterioration. The existing approaches are essentially based on projecting the image in front of the retina, as this is intended to slow the elongation of the eye. It has been shown that it is sufficient if this occurs only in the periphery of the retina.

[0005] One possible approach is the use of bifocal lenses and / or progressive lenses (PAL). With these lenses, a portion of the image is focused in front of the retina when looking at distant objects, and when looking at near objects, the image is not focused behind the retina, at least in cases of insufficient accommodation. This works better for children with accommodative insufficiency and / or convergence excess. However, acceptable results with such approaches are only achieved in a smaller group with convergence excess. Bifocal lenses are generally undesirable, especially for children, at least for cosmetic reasons.

[0006] Another approach is based on special PAL (or radially symmetric PAL) with a central sharp imaging effect and a peripheral addition (e.g. DE 10 2009 053 467 A1).

[0007] PAL, as in these two approaches, exhibits areas with significant aberrations. Furthermore, the quality of peripheral vision, and also foveal vision when looking through the periphery of the lenses, is severely reduced by these aberrations. If high demands are placed on the visual system (e.g., in road traffic), this can only be resolved with a second pair of single-vision glasses. This further increases the effort and costs associated with changing the prescription. Consequently, the acceptance of such solutions is often low.

[0008] Other approaches are based, for example, on special contact lenses. Progressive contact lenses with a higher plus power in the periphery than in the central area have been studied. However, in practice, this also impairs foveal vision. Furthermore, a new lens must be manufactured if the prescription changes. Handling and reliability are also limited in children. This is especially true for young children, and the situation is further complicated by the fact that the greatest effect is actually achieved when measures to slow the progression of myopia are started in early childhood.

[0009] Another approach using contact lenses employs so-called Ortho-K contact lenses, which are worn overnight and deform the cornea. This aims to correct myopia centrally and also create a positive correction (compared to central correction) in the periphery. However, each contact lens is custom-made, and a new lens must be manufactured, for example, in the case of a new prescription, a complex process. Furthermore, the effects of corneal deformation on metabolism and corneal structure, particularly in young children, remain unclear.

[0010] The problem that arises for eyeglass wearers as myopia progresses is the steadily decreasing comfort of a pair of glasses that has already been fitted. Special lenses for myopia control attempt to shift the focal plane of the visual field in the periphery in front of the retina, thus slowing the elongation of the eye.

[0011] Various lenses have been proposed so far, some similar to progressive lenses, which, through an addition to the peripheral power, bring the focal plane in the lateral field of vision in front of the retina (e.g., US7025460). In particular, there is the approach of having a central zone of good vision surrounded by an addition in front of the peripheral zone (e.g., WO2007041706A1), as well as the possibility of applying the additional power only to parts of the periphery (e.g., DE102009053467B4). The challenge with these lenses is to find the balance between the effectiveness of the lenses (e.g., with the largest possible areas of peripheral power in front of the retina) and their tolerability (optical comfort, defined in particular by the zone of good or acceptable vision, as well as by distortions and motion blur).

[0012] Furthermore, Publication US 2012 / 019775 A1 describes a training method for accommodation and vergence systems and multifocal ophthalmic lenses with horizontal periodic or quasi-periodic continuously varying optical power (HOPSA lenses). Several embodiments of HOPSA lenses are described, such as multi- and monocyclic, multilayer lenses that divide the basic correction and training functions between the lens surfaces or layers, and whose left and right lens surfaces are individually configured.

[0013] Document US 2009 / 310082 A1 describes an ophthalmic lens element. The ophthalmic lens element comprises a central region with low surface astigmatism and a peripheral region. The central region includes an upper viewing zone with a first refractive power suitable for the wearer's distance vision tasks. The peripheral region has a positive refractive power relative to the first refractive power and surrounds the central region. The peripheral region provides optical correction and includes one or more regions with relatively high surface astigmatism, a lower or near viewing zone with low surface astigmatism, and a corridor with low surface astigmatism whose refractive power varies from that of the upper viewing zone to that of the lower viewing zone.

[0014] Document US 2012 / 176583 A1 further describes an ophthalmic lens comprising a prescription control point, an upper portion which, with respect to the prescription control point, exhibits a continuous change in mean refractive power, and a lower portion which, with respect to the prescription control point, exhibits a continuous change in mean refractive power.

[0015] The object of the present invention is therefore to improve the long-term tolerability of spectacles and thus achieve long-term and high wearing comfort with simultaneously improved perception. This object is achieved according to the invention by a spectacle lens with the features specified in the independent claim. Preferred embodiments are the subject of the dependent claims.

[0016] The invention thus relates to a spectacle lens comprising a continuous channel area and an effective area such that the (continuous) channel area extends continuously from an upper edge of the spectacle lens to a lower edge of the spectacle lens, and that the effective area borders the channel area horizontally on both sides and extends continuously on both sides from the upper to the lower edge of the spectacle lens. The refractive power of the spectacle lens increases on both sides of the channel area towards the effective area.

[0017] In this context, the channel area serves in particular as a prescription area, i.e. as an area of ​​clear vision, since the individual prescription data for the correction of a visual impairment (especially at least refractive power and astigmatism) are implemented there in a prescription-oriented manner.

[0018] Compared to spectacle lenses whose central zone is completely surrounded by a plus power, spectacle lenses according to the invention offer the advantage of an enlarged field of vision with sharp perception, while surprisingly, comfort is also improved due to a significant reduction in distortion in all directions. Compared to conventional spectacle lenses with only a partial plus power zone, the suppression of myopia progression is significantly greater in spectacle lenses according to the invention.

[0019] In other words, these advantages of the lenses according to the invention are achieved by the fact that the additional effect fills the majority of the lens's periphery, while leaving two specific peripheral areas free, which are located approximately diametrically opposite each other: one area extending downwards from the center, particularly slightly nasally offset, to support near vision with the lens, in which the eyes assume a convergence position, and another area extending upwards from the center to stabilize the field of vision and thus ensure both comfort and effectiveness. The optimal distribution of the areas with and without the additional effect (compared to the prescription effect) in the lens's periphery achieves maximum comfort with good preventive efficacy.

[0020] The directions "bottom" and "top" (and derived terms such as "below" and "above") as well as terms for directions "nasal," "temporal," "horizontal," and "vertical" are always understood in this description in relation to the spectacle lens's position in use, which is determined in particular by the centration data for the spectacle lens. Preferably, the "bottom" and "top" edges of the spectacle lens are understood to be edge segments of a lower or upper half, more preferably a lower or upper third, and even more preferably a lower or upper quarter, of a spectacle lens surface (front and / or back surface). Particularly preferably, an upper or bottom edge refers to a segment of the edge of the entire spectacle lens that defines the uppermost or lowest 20%, preferably 15%, more preferably 10%, and most preferably 5%, of the vertical height of the spectacle lens.The spectacle lens described in this text is a pre-edged or ground (finished) spectacle lens.

[0021] The horizontal width of the channel area at the upper and lower edges of the spectacle lens (or, in particular, the respective distance between the points where lateral boundary lines between the channel area and the effective area meet the edge of the spectacle lens) is less than a maximum horizontal width of the channel area. However, it is at least preferred that the channel area in a vertically central region (e.g., one of the middle thirds in height) of the spectacle lens has a maximum horizontal width that is greater than a minimum, preferably maximum, horizontal width of the channel area above, in particular in one of the upper thirds in height of the spectacle lens, and / or a minimum, preferably maximum, horizontal width of the channel area below, in particular in one of the lower thirds in height of the spectacle lens.This results in a particularly high effectiveness of the effective area, which is divided into a nasal and a temporal effective area by the continuous channel, which is especially narrow at the top and bottom. Both the nasal and temporal effective areas, considered individually, extend continuously from the upper to the lower edge of the lens, with both areas directly adjacent to the channel, particularly along the entire length between the upper and lower edges of the lens. The refractive power, which increases from the channel area to the effective area, preferably remains constant at the transition between the channel area and the effective area, especially on both sides. This ensures a steady visual impression even during head movements.

[0022] Particularly preferably, the maximum refractive power in the nasal and temporal regions differs from each other by no more than about 3 diopters (dpt), preferably no more than about 2 dpt, more preferably no more than about 1 dpt, and most preferably no more than about 0.5 dpt. Alternatively or simultaneously, depending on the embodiment and application, the maximum refractive power in both the nasal and temporal regions is greater than the minimum refractive power in the canal region by at least about 1 dpt, preferably at least about 1.5 dpt, more preferably at least about 2 dpt, more preferably at least about 2.5 dpt, and most preferably at least about 3 dpt. The total range of variation in refractive power between a minimum refractive power in the canal region and a maximum refractive power in the region of action preferably also depends on the possible range of variation in refractive power within the canal region.Thus, with a nominal "single-vision lens," where the refractive power varies only slightly across the entire canal area and compensates for the refractive error of the corresponding eye as described in the prescription with a single refractive power value, sufficient effect in the effective area may be achieved with a total refractive power variation of up to 2 diopters between the canal area and the effective area. However, if the canal area already incorporates a progressive increase in power downwards, for example, in the form of a nominal "progressive lens," the total range of refractive power variation between the minimum refractive power in the canal area and the maximum refractive power in the effective area could preferably be greater.In particular, it is preferred if, over the entire length of the channel area between the upper and lower edges of the spectacle lens, the horizontal increase in refractive power towards or within the effective area is large enough to stimulate sufficient suppression of myopia progression. Therefore, the total range of refractive power variation between the minimum refractive power in the channel area and the maximum refractive power in the effective area is then at least greater than the sum within the channel area.

[0023] The channel area within the spectacle lens is bounded on both sides by a channel boundary line towards the effective area. This boundary line is defined for each horizontal section through the spectacle lens by the fact that, starting from a position of minimum refractive power within the channel area along the respective section, the refractive power of the spectacle lens is first higher at the lateral sides by a channel tolerance value (characteristic of the channel area) than the respective minimum refractive power (within the channel area along the respective section). The (channel-specific) channel tolerance value is in the range of approximately 0.25 diopters to approximately 0.5 diopters, particularly at 0.25 diopters, or particularly at approximately 0.3 diopters, or particularly at approximately 0.35 diopters, or particularly at approximately 0.4 diopters, or particularly at approximately 0.45 diopters, or particularly at approximately 0.5 diopters.

[0024] This type of definition of channel boundaries via the course of the channel boundary lines based on horizontal sections through the spectacle lens is therefore particularly advantageous for many preferred embodiments of the invention because it allows the course and extent of the channel area to be essentially independent of the course of the absolute values ​​of the refractive power along the channel area (e.g. in the presence of an addition in the case of a progressive lens, as will be described further below).

[0025] In a preferred embodiment, for at least 50%, preferably at least 60%, more preferably at least 70%, most preferably at least 80% of the height of the spectacle lens, in each horizontal section, the maximum refractive power in the nasal and / or temporal action section is greater by at least one minimum power value than the minimum refractive power within the canal area along the respective section, wherein the minimum power value is greater by about 0.25 diopters, preferably by about 0.5 diopters, more preferably by about 1 diopter, most preferably by about 1.5 diopters than the minimum refractive power within the canal area or by about 0.25 diopters, preferably by about 0.5 diopters, more preferably by about 1 diopter, most preferably by about 1.5 diopters, than the canal tolerance value.

[0026] In a preferred embodiment, for at least 50%, preferably at least 60%, more preferably at least 70%, most preferably at least 80% or even at least 90% of the height of the spectacle lens, in each horizontal section, the nasal and / or temporal action section has an action increase area directly adjacent to the channel area with a horizontal width of at least 5 mm, preferably at least 10 mm, or more preferably at least 20 mm, within which the refractive power increases (preferably strictly) monotonically from the channel area towards the respective periphery.

[0027] In a preferred embodiment, in other words, for each horizontal section through the spectacle lens that intersects both the channel area and (particularly on both sides) the effective area, a corresponding boundary line can be defined between the channel area and the adjacent effective area where the refractive power of the spectacle lens, starting from the minimum refractive power within the channel area in the respective section (nasal and / or temporal), is first higher by a predetermined value (channel tolerance value) of, in particular, 0.25 diopters or 0.5 diopters (i.e., higher than said minimum refractive power within the channel area in the respective section). In other words, the channel area is defined in such a way that its refractive power variation within each horizontal section is not greater than the channel tolerance value of, in particular, approximately 0.25 diopters or approximately 0.5 diopters.

[0028] The channel area is thus completely delimited, in particular, by the channel boundary lines on both sides and by the edge of the spectacle lens (especially the upper and lower edges). Particularly preferably, for at least 50%, preferably at least 60%, more preferably at least 70%, and most preferably at least 80% of the height of the spectacle lens, the refractive power in the effective area increases for each horizontal section through the spectacle lens from the respective channel boundary line up to a respective maximum refractive power by at least approximately 0.25 diopters, preferably by at least approximately 0.5 diopters, more preferably by at least approximately 1 diopter, and most preferably by at least approximately 1.5 diopters.

[0029] In a preferred embodiment, the channel area comprises: a central main viewing area; a near vision zone located below the central main viewing area and extending from the central main viewing area to the lower edge of the lens; and an upper channel section located above the central main viewing area and extending from the central main viewing area to the upper edge of the lens.

[0030] In a preferred embodiment, the spectacle lens has a substantially constant refractive power throughout the entire channel area, with a continuous line within the channel area running from the upper to the lower edge of the spectacle lens, along which the refractive power of the spectacle lens varies by, in particular, no more than about 0.5 diopters, preferably no more than 0.25 diopters. Such a spectacle lens therefore acts as a nominal "single-vision lens".

[0031] Preferably, the spectacle lens has a (correspondingly) substantially constant refractive power at least in the central main viewing area and in the upper channel section. In the case of a nominal multifocal or "progressive" lens, it is preferred if the spectacle lens has a higher average refractive power in the near vision zone than in the central main viewing area.

[0032] To best accommodate the convergence of gaze directions during near vision, it is preferred that the near vision zone extends from the central main viewing area to the lower edge of the lens along a line, particularly a straight line, which extends nasally downwards from a center (especially a centroid) of the central main viewing area at an angle of approximately 0° to approximately 30°, preferably approximately 5° to approximately 20°, and even more preferably approximately 8° to approximately 15°, relative to the vertical. The center can be, in particular, a midpoint (e.g., the geometric centroid or the center of an inscribed circle) of the central main viewing area.

[0033] Preferably, the horizontal width of the upper channel section (between the central main viewing area and the upper edge of the spectacle lens) is in a range of at least about 3 mm, preferably at least about 5 mm, more preferably at least about 10 mm, and / or the horizontal width of the upper channel section (between the central main viewing area and the upper edge of the spectacle lens), or at least a minimum horizontal width of the upper channel section (i.e. at its narrowest point), is preferably in a range of no more than about 30 mm, more preferably no more than about 20 mm, more preferably no more than about 10 mm.

[0034] Preferably, the horizontal width of the near vision zone (between the central main viewing area and the lower edge of the spectacle lens) is in a range of at least about 3 mm, preferably at least about 5 mm, even more preferably at least about 10 mm, and / or the horizontal width of the near vision zone (between the central main viewing area and the lower edge of the spectacle lens), or at least a minimum horizontal width of the near vision zone (i.e. at its narrowest point), is preferably in a range of no more than about 30 mm, preferably no more than about 20 mm, even more preferably no more than about 10 mm.

[0035] In a preferred embodiment, the (maximum) horizontal width of the central main viewing area is in a range of at least about 5 mm, preferably at least about 10 mm, more preferably at least about 15 mm, most preferably at least about 20 mm, and / or the (maximum) horizontal width of the central main viewing area is in a range of no more than about 35 mm, preferably no more than about 30 mm, more preferably no more than about 25 mm, most preferably no more than about 20 mm.Another preferred spectacle lens can be characterized by the fact that the central main viewing area comprises a circular area with a radius of at least about 3 mm, preferably at least about 5 mm, even more preferably at least about 8 mm; and / or wherein the central main viewing area lies within a circular area with a radius of at most about 25 mm, preferably at most about 20 mm, even more preferably at most about 15 mm, most preferably at most about 10 mm.In a further characterization of a preferred embodiment, the effective area lies outside a (central) circular area with a radius of at least about 10 mm, preferably at least about 15 mm, particularly preferably at least about 20 mm, even more preferably at least about 25 mm, most preferably at least about 30 mm, wherein, in particular in a spectacle lens according to a preferred embodiment, this circular area lies within the central main viewing area.

[0036] Preferably, the maximum horizontal width of the central main viewing area is greater than the maximum width of the upper canal segment. Alternatively, or in addition, the maximum horizontal width of the central main viewing area is preferably greater than the maximum width of the near vision zone. This allows for the largest possible field of vision with sharp perception in the main viewing area, while simultaneously minimizing the reduction of the effective area. Since the effective area is thus increased in a region horizontal to the upper canal segment and / or the near vision zone, the effectiveness in suppressing myopia progression can be significantly higher in such lenses, while the lens tolerance for the upper canal segment and / or the near vision zone is improved or at least maintained.

[0037] The main viewing area is preferably located in a vertically central region, particularly in the middle third of the lens height. Specifically, the upper channel section is located in the uppermost 30%, preferably 20%, more preferably 15%, even more preferably 10%, and most preferably 5%, of the vertical height of the lens. In particular, the near vision zone is also, or alternatively, located in the lowermost 30%, preferably 20%, more preferably 15%, even more preferably 10%, and most preferably 5%, of the vertical height of the lens.

[0038] The invention is described in more detail below with reference to preferred embodiments and the accompanying drawings. These drawings show: Fig. 1 schematic representation of individual areas on a spectacle lens according to a preferred embodiment; Fig. 2 schematic representation of an exemplary refractive power distribution in a spectacle lens according to a preferred embodiment; Fig. 3 shows a specific refractive power distribution in a spectacle lens.

[0039] Fig. 1 Figure 1 shows a schematic distribution of individual areas on a spectacle lens 10 according to a preferred embodiment. A channel area 12 extends continuously from an upper edge 14 of the spectacle lens 10 to a lower edge 16 of the spectacle lens 10. When the correct prescription is applied for the corresponding eye, this channel area 12 serves as the clear vision area or prescription area of ​​the spectacle lens 10, such that the user can see clearly through this area, as this area largely compensates for any refractive error of the eye.

[0040] In the illustrated embodiment, the channel area 12 is schematically divided into three sections, namely: a central main viewing area 20, which can be used in particular for the user to look straight ahead (or to look into the distance towards the horizon), a near vision zone 22, which extends slightly nasally downwards from the central main viewing area 20 to the lower edge 16 of the spectacle lens 10, and an upper channel section 24, which extends from the central main viewing area 20 to the upper edge 14 of the spectacle lens 10.

[0041] In general (i.e., not only in the embodiment shown here), it is preferred if the upper channel section extends substantially along a vertical line, i.e., (in particular unlike the near vision zone) runs substantially vertically.

[0042] This canal region 12 is surrounded nasally and temporally by a respective nasal and temporal effective section 18n and a temporal effective section 18t, respectively, which border directly on the canal region 12, particularly along a respective nasal canal boundary line 26n and a temporal canal boundary line 26t. The two effective sections 18n and 18t together form an effective area in which the spectacle lens 10 exhibits a significantly higher refractive power compared to the prescription data realized in the canal region. In other words, the refractive power of the spectacle lens 10 increases along the entire length of the canal region 12, from the canal region 12 on both sides towards the effective area (or the respective effective sections), particularly in the region of the canal boundary lines 26n and 26t.

[0043] Within the channel area, however, the refractive power of the spectacle lens is at least partially essentially constant. Particularly preferably, the refractive power of the spectacle lens 10 is essentially constant at least in the main viewing area 20 and in the upper channel section 24. To achieve a nominal "single-vision lens," the refractive power of the spectacle lens 10 is preferably essentially constant throughout the entire channel area 12. If, however, the invention is to be used, for example, in conjunction with a progressive lens effect, the refractive power of the spectacle lens 10 can be higher at least in the near-vision zone 22, according to an addition specified in a (particularly individual) prescription, than in the central main viewing area 20.

[0044] As can be seen from the schematic representation of the preferred embodiment of Fig. 1As can be seen, the central main viewing area 20 has a maximum horizontal width (between the channel boundary lines 26n, 26t) that is particularly greater than the minimum horizontal width of the near vision zone 22 and the minimum horizontal width of the upper channel section 24. The combination of a substantially constant refractive power in the central main viewing area 20 and the upper channel section 24 with the (at least partially) narrow channel width in the upper channel section 24 results in high effectiveness of the entire effective area in suppressing myopia progression, coupled with surprisingly good tolerability of the spectacles. Unlike concepts with continuous effective areas at the top, the concept described here minimizes distortion and oscillation effects.This improvement is achieved in principle for both single-vision lenses (i.e., when the entire canal area 12 has an essentially constant refractive power) and progressive lenses (i.e., when the near vision zone 22 in particular has an addition).

[0045] Fig. 2 Figure 1 shows a schematic representation of an exemplary refractive power distribution in a spectacle lens according to a preferred embodiment. This schematic representation could, in principle, be applied in particular to a spectacle lens 10 made of Fig. 1 correspond, whereby in Fig. 2The specific distribution of refractive power indicates that this is a single-vision lens. The channel area 12, which comprises the upper channel section 24, the central main viewing area 20, and the near-vision zone 22, extends in this order from the upper edge 14 of the lens 10 to the lower edge 16 of the lens. The nasal section 18n and the temporal section 18t border this channel area 12 laterally.

[0046] The additional features of the entire edge profile of the spectacle lens in Fig. 2 The lines shown represent lines (isolines) of equal refractive power of the spectacle lens 10. For example, the refractive power intervals of adjacent lines could be in Fig. 2Each represents a difference of 0.5 diopters. As can be seen from this, the entire channel area lies within a region of essentially constant refractive power, which corresponds precisely to a single-vision lens. The refractive power of the spectacle lens 10 in the channel area need not be 0. It can be either positive or negative. In practice, the invention will be particularly relevant in connection with a negative refractive power of the spectacle lens 10 in the channel area, since further myopia progression is frequently observed, especially in cases of existing myopia, and the spectacle lenses according to the invention are particularly suitable in such cases.

[0047] Regardless of the absolute value of the refractive power, the spectacle lens 10 exhibits in the representation of Fig. 2The lowest refractive power is found in channel area 12. Towards the lateral effective sections 18n, 18t, the refractive power of the spectacle lens 10 then increases steadily and, in the schematic representation, reaches its respective maximum at approximately the middle height in the area of ​​the lateral edges of the spectacle lens 10.

[0048] The course and extent of the channel area 12 can be defined for preferred embodiments via limit values ​​of the refractive power of the spectacle lens 10. While in general, which is particularly advantageous when applying the present invention to progressive lenses, a comparison of the refractive power along horizontal sections as described above can be carried out, it is also possible, particularly when applying the invention to single-vision lenses, to use a global refractive power limit based on the channel tolerance value to define the course of the channel boundary lines for characterizing the channel area 12 of preferred embodiments.In a characterization of preferred embodiments of the invention, particularly for use in single-vision lenses, the channel boundary lines could be defined by the fact that the refractive power of the spectacle lens, starting from a position within the channel area 12 and extending to the lateral effective sections, is first higher there by the channel tolerance value (characteristic in particular for the channel area) than a minimum refractive power within the (entire) channel area 12. Otherwise, the channel tolerance value can be determined as already described above. Referring to the schematic representation in... Fig. 2 For example, the two isolines for the smallest marked refractive power could be used as channel boundary lines 26n, 26t.

[0049] Fig. 3Finally, an exemplary specific refractive power distribution in a spectacle lens according to a preferred embodiment is shown. Exemplary dimensions in mm are indicated on the horizontal and vertical axes, while the isolines connect positions of equal refractive power. The difference in refractive power values ​​between adjacent isolines is, as can be seen from the labeling, 0.25 diopters in this case. This is also a single-vision lens. Reference symbol list

[0050] 10 Spectacle lens 12 Channel area 14 Upper edge 16 Lower edge 18 Nasal effective section 18 Temporal effective section 20 Central main viewing area 22 Near vision zone 24 Upper channel section 26 Nasal channel boundary 26 Temporal channel boundary

Claims

1. A rimmed or ground eyeglass lens (10) comprising: - a continuous channel area (12) extending continuously from an upper edge (14) to a lower edge (16) of the eyeglass lens; and - an effective area (18n, 18t) adjacent to the continuous channel area (12) on both sides horizontally and extending continuously from the upper edge (14) to the lower edge (16) of the eyeglass lens (10), wherein the refractive power of the eyeglass lens (10) increases from the channel area (12) toward the effective area (18n, 18t) on both sides of the channel area (12), wherein a horizontal width of the channel area at the upper edge and at the lower edge of the eyeglass lens is smaller than a maximum horizontal width of the channel area, wherein the channel area (12) is bounded on both sides within the eyeglass lens (10) by a channel boundary line, which is defined for each horizontal section through the eyeglass lens by the fact that the refractive power of the eyeglass lens, starting from a position of minimum refractive power within the channel area along the respective section, is higher there for the first time by a channel tolerance value than the respective minimum refractive power, and wherein the channel tolerance value is in the range of about 0.25 dpt to about 0.5 dpt.

2. Lens (10) according to claim 1, wherein the channel area has a maximum horizontal width in a vertically central area of the lens that is greater than a minimum horizontal width of the channel area above and / or greater than a minimum horizontal width of the channel area below.

3. Lens (10) according to claim 1 or 2, wherein the effective area comprises a nasal effective section (18n) and a temporal effective section (18t), each of which is formed contiguously and which are separated from each other by the channel area (12).

4. Lens (10) according to claim 3, wherein the maximum refractive power in the nasal (18n) and temporal effective section (18t) differs by no more than about 3 dpt, preferably no more than about 2 dpt, more preferably no more than about 1 dpt, most preferably no more than about 0.5 dpt, and / or wherein the maximum refractive power in both the nasal (18n) and temporal effective section (18t) is at least about 1 dpt, preferably at least about 1.5 dpt, more preferably at least about 2 dpt, even more preferably at least about 2.5 dpt, most preferably at least about 3 dpt greater than the minimum refractive power in the channel section (12).

5. Lens (10) according to claim 3 or 4, wherein for at least 50%, preferably at least 60%, even more preferably at least 70%, most preferably at least 80% of the height of the lens (10), in each horizontal section, a maximum refractive power in the nasal and / or temporal effective section is at least one minimum effective value greater than the minimum refractive power within the channel area along the respective section, wherein preferably the minimum effective value is about 0.25 dpt, preferably about 0.5 dpt, more preferably about 1 dpt, most preferably about 1.5 dpt greater than the minimum refractive power within the channel area.

6. Lens according to one of the preceding claims, wherein the channel tolerance value is 0.25 dpt, or approximately 0.3 dpt, or approximately 0.35 dpt, or approximately 0.4 dpt, or approximately 0.45 dpt, or approximately 0.5 dpt.

7. Lens according to one of the preceding claims, wherein the minimum effective value is greater than the channel tolerance value by about 0.25 dpt, preferably by about 0.5 dpt, more preferably by about 1 dpt, most preferably by about 1.5 dpt.

8. Lens (10) according to one of the preceding claims, wherein the channel area (12) comprises: - a central main viewing area (20); - a near vision zone (22) arranged below the central main viewing area (20) and extending from the central main viewing area (20) to the lower edge (16) of the eyeglass lens (10); and - an upper channel section (24) arranged above the central main viewing area (20) and extending from the central main viewing area (20) to the upper edge (14) of the eyeglass lens (10).

9. Lens (10) according to claim 8, which has a substantially constant refractive power in the central main viewing area (20) and in the upper channel section (24).

10. Lens (10) according to claim 8 or 9, which has a substantially constant refractive power in the central main viewing area (20) and in the near vision zone (22).

11. Lens (10) according to claim 8 or 9, which has a higher average refractive power in the near vision zone (22) than in the central main viewing area (20).

12. Lens (10) according to any one of claims 8 to 11, wherein the near vision zone extends from the central main viewing area to the lower edge of the lens along a line, in particular a straight line, which extends from a center (in particular a center of gravity) of the central main viewing area nasally downward at an angle in the range from about 0° to about 30°, preferably in a range from about 5° to about 20°, more preferably in a range from about 8° to about 15° relative to the vertical.

13. Lens according to any of claims 8 to 12, wherein a horizontal width of the upper channel section is in a range of at least about 3 mm, preferably at least about 5 mm, more preferably at least about 10 mm, and / or wherein a horizontal width of the upper channel section, or at lea ely a minimum horizontal width of the upper channel section, is in a range of not more than about 30 mm, preferably not more than about 20 mm, and more preferably not more than about 10 mm.

14. Lens according to any of claims 8 to 13, wherein a horizontal width of the near vision zone is in a range of at least about 3 mm, preferably at least about 5 mm, more preferably at least about 10 mm, and / or wherein a horizontal width of the near vision zone, or at least a minimum horizontal width of the near vision zone, is in a range of not more than about 30 mm, preferably not more than about 20 mm, more preferably not more than about 10 mm.

15. Lens according to any of claims 8 to 14, wherein a horizontal width of the central main viewing area is in a range of at least about 5 mm, preferably at least about 10 mm, more preferably at least about 15 mm, most preferably at least about 20 mm, and / or wherein a horizontal width of the central main viewing area is in a range of not more than about 35 mm, preferably not more than about 30 mm, more preferably not more than about 25 mm, most preferably not more than about 20 mm.