Spectacle lens for controlling myopia by enhancing peripheral refractive action

Abstract

The invention relates to a spectacle lens (10) comprising a specially shaped peripheral region with differentiated optical properties to improve the comfort of long term wear and at the same time improve perceptibility. Specifically, the spectacle lens (10) comprises:-a continuous channel region (12) extending continuously from an upper edge (14) to a lower edge (16) of the spectacle lens; and-dioptrically active regions (18n, 18t) which adjoin the continuous channel region (12) in the horizontal direction on both sides and extend continuously from the upper edge (14) to the lower edge (16) of the spectacle lens (10), the refractive power of the spectacle lens (10) increasing from the channel region (12) to the dioptrically active regions (18n, 18t) on both sides of the channel region (12).

Description

Technical Field

[0001] The present invention relates to an ophthalmic lens comprising at least one specially shaped peripheral region having differentiated optical properties for improving comfort during long-term wear and simultaneously improving perception. Background Art

[0002] Especially in the case of ophthalmic lenses for correcting myopia, once worn, the significant tendency for myopia to deepen frequently leads to a reduction in the wearing comfort of the ophthalmic lens, thereby also reducing the wearer's satisfaction and again reducing the tolerance to the glasses after a short time.

[0003] Generally speaking, the myopia rate is rising sharply globally, especially in Asia. According to the World Health Organization's estimate, by 2050, more than 50% of the global population will suffer from myopia. As an individual's myopia increases, the risk of developing related eye diseases such as retinal detachment, glaucoma, cataract, and macular degeneration also increases sharply. Therefore, there is great interest in slowing down the growth of myopia. For this purpose, there are several methods that can use optical aids (visual aids) to slow down the development of myopia. However, what all these methods have in common is that they are very complex and costly, and they are also quite inflexible when adapting to rapidly changing situations (such as changes in glasses prescriptions, requirements for the visual system).

[0004] So far, various optical refractive effects on the tolerance and comfort of ophthalmic lenses (especially glasses lenses) with respect to myopia and / or hyperopia and their progression or development have been studied based on optical and physiological mechanisms aimed at explaining or slowing down progression or development (especially degeneration). Existing methods are basically based on imaging an image in front of the retina because this is intended to slow down the growth of the eye length. It has been proven that it is sufficient if this only occurs in the retinal periphery.

[0005] One possible method uses bifocal glasses lenses and / or progressive addition lenses (PAL). In this regard, on the one hand, through the addition power, the area for seeing in the distance in the peripheral region is imaged in front of the retina; on the other hand, when looking at near objects, at least in the case of weak accommodation, the image is not imaged behind the retina. This is more effective for children with insufficient accommodation and / or exophoria. However, with such methods, only a relatively small group of patients with exophoria can achieve acceptable results. However, bifocal lenses are not very popular, especially for children, at least for aesthetic reasons.

[0006] Another method is based on a special PAL (or radially symmetric PAL) which has a clear imaging effect at the center and additional diopters at the periphery (for example, DE 10 2009 053 467 A1).

[0007] As with these two methods, the PAL also includes regions with higher aberrations. In addition, due to the presence of aberrations, when observing through the lens periphery, the quality of peripheral vision (peripheren Sehens) and foveal vision (fovealen Sehens) is significantly reduced. If the requirements for the visual system are high (for example, in road traffic), this can only be solved by a second pair of single-vision glasses (Einstärkenbrille). This further increases the effort and cost required when adjusting the prescription. Therefore, the acceptance of such solutions is usually low.

[0008] For example, other methods are based on special contact lenses, etc. For example, progressive contact lenses have been studied, where the positive refractive effect (Pluswirkung) at the periphery is higher than that in the central region. In practice, however, this also impairs foveal vision. In addition, if there is a change in vision, it is necessary to incur significant costs to produce new lenses. In addition, for children, handling and reliability are limited. This is especially true for young children, and in fact, measures to slow down myopia need to be implemented from an early age to achieve the best results, which becomes more difficult.

[0009] Another method using contact lenses is the use of so-called OK contact lenses, which are worn overnight and cause corneal deformation. This is to correct myopia at the center and produce a positive refractive effect (relative to the center) at the periphery. However, in this case, each contact lens is custom-made, and for example, in the case of a new prescription, a large amount of money must be spent to manufacture new lenses. In addition, the impact of corneal deformation on the metabolism and structure of the cornea is not yet clear, especially for young children.

[0010] The problem that myopia progression brings to glasses wearers is that once worn, the wearing comfort of the glasses gradually decreases. Special spectacle lenses for controlling myopia attempt to shift the focal plane of the field of view to the edge in front of the retina, thereby slowing down the growth of the eye length.

[0011] A variety of spectacle lenses have been proposed, for example, similar to progressive lenses, which shift the focal plane in the lateral field of view in front of the retina by the refractive action of an additional diopter in the periphery (e.g., US7025460). In particular, there are methods for making the central area surrounded by the peripheral area with an additional diopter have a good field of view (e.g., WO2007041706A1) and the possibility of introducing an additional refractive action only in part of the periphery (e.g., DE102009053467B4). The challenge with these lenses is to find a balance between the effectiveness of the lens (e.g., having as large an area as possible with peripheral refractive action in front of the retina) and the tolerance of the lens (especially the optical comfort defined by an area with a good or acceptable field of view and by distortion and swaying effects). SUMMARY OF THE INVENTION

[0012] Accordingly, an object of the present invention is to improve the long-term tolerance of spectacles, thereby achieving high long-term wearing comfort and simultaneously improving perception. According to the present invention, this object is achieved by a spectacle lens having the features specified in the independent claims. Preferred embodiments are the subject matter of the dependent claims.

[0013] Accordingly, the present invention relates to a spectacle lens comprising a continuous channel region and a refractive action region, wherein the (continuous) channel region extends continuously from the upper edge of the spectacle lens to the lower edge of the spectacle lens, and the refractive action region adjoins the channel region horizontally on both sides and extends continuously from the upper edge to the lower edge of the spectacle lens on both sides. Here, the refractive power of the spectacle lens increases from the channel region towards the refractive action regions on both sides of the channel region.

[0014] At this time, the channel region is particularly used as a prescription region (Rezeptbereich), that is, a clear vision region (Klarsichtbereich), because this is the part where individual prescription data for correcting visual defects (in particular, at least correcting refractive power and astigmatism) are implemented in a prescription-compliant manner.

[0015] Compared with spectacle lenses in which the central area is completely surrounded by a positive refractive action, the spectacle lens of the present invention has the advantages of an enlarged field of view and clear perception, and at the same time, the tolerance is surprisingly improved due to a significant reduction in distortion in all directions. Compared with conventional spectacle lenses having only a partial positive area, the spectacle lens of the present invention has a significantly higher effect of suppressing the development of myopia.

[0016] In other words, these advantages of the spectacle lens according to the invention are achieved in the following manner: the additional refractive effect particularly fills most of the periphery of the spectacle lens, but leaves two special peripheral regions that are particularly diametrically opposite, one region extending downward from the center in a manner that is particularly slightly offset towards the nasal side in order to support myopia of the spectacle lens when the eyes are in the convergent position; the other region extends upward from the center in order to achieve the stabilization of the image field, thereby ensuring tolerance and effectiveness simultaneously. Through the optimized distribution of the regions with or without additional refractive effect (compared to the prescribed refractive effect) in the periphery of the spectacle lens, maximum tolerance and a good preventive effect are achieved.

[0017] In this specification, the terms of directions "downward" and "upward" (and the terms derived from them, such as "below" and "above"), as well as the terms of directions "nasal", "temporal", "horizontal", and "vertical" are always related to the use position of the spectacle lens, which is particularly defined by the central data of the spectacle lens. In this case, the "lower" edge and "upper" edge of the spectacle lens are preferably understood as the lower half or upper half of the surface of the spectacle lens (front surface and / or back surface), more preferably the lower third or upper third, even more preferably the lower quarter or upper quarter of the edge part. Particularly preferably, the upper edge or lower edge particularly refers to a part of the edge of the entire spectacle lens that defines the uppermost or lowermost 20%, preferably 15%, even more preferably 10%, and most preferably 5% of the vertical height of the spectacle lens. The spectacle lens mentioned in this specification can particularly be a spectacle lens that has been edge-trimmed or optically polished (finished) or an unprocessed cylindrical spectacle lens.

[0018] Preferably, the horizontal width of the channel region at the upper and lower edges of the spectacle lens (or in particular the corresponding distance between the points at which the lateral boundary line between the channel region and the refractive action region intersects the edge of the spectacle lens) is less than the maximum horizontal width of the channel region. However, at least preferably, the channel region in the vertical middle region of the spectacle lens (e.g., the middle third of the height) has a maximum horizontal width that is greater than the minimum (preferably, maximum) horizontal width of the upper channel region, in particular in the upper third of the height of the spectacle lens, and / or greater than the minimum (preferably, maximum) horizontal width of the lower channel region, in particular in the lower third of the height of the spectacle lens. This results in a particularly high refractive action of the refractive action region, which is divided into a nasal refractive action part and a temporal refractive action part by a continuous channel that is particularly narrow at the top and bottom. Here, in particular, when considered separately, both the nasal refractive action part and the temporal refractive action part extend coherently from the upper edge to the lower edge of the spectacle lens, where the nasal refractive action part and the temporal refractive action part directly adjoin the channel region along the entire length between the upper and lower edges of the spectacle lens. The refractive power that increases from the channel region to the refractive action region is preferably also continuous at the transition from the channel region to the refractive action region, in particular continuous on both sides. This ensures a stable visual impression even when the head is moving.

[0019] Particularly preferably, the maximum refractive powers in the nasal and temporal refractive portions differ from each other by no more than about 3 dpt, preferably no more than about 2 dpt, even 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 the field of application, the maximum refractive power in both the nasal and temporal refractive regions is at least about 1 dpt greater than the minimum refractive power in the channel region, preferably at least about 1.5 dpt, more preferably at least about 2 dpt, even more preferably at least about 2.5 dpt, and most preferably at least about 3 dpt. Preferably, the total refractive power change range from the minimum refractive power in the channel region to the maximum refractive power in the refractive portion also depends on the possible refractive power change range in the channel region. Thus, for the case of a nominal "single vision lens" (where the refractive power of the single vision lens varies only slightly throughout the channel region and the refractive power value is used to compensate for the refractive defect of the corresponding eye specified in the prescription), a sufficient refractive effect within the refractive portion may already be achieved with a total refractive power change range of up to 2 dpt between the channel region and the refractive portion. However, if the channel region already provides an increased progressive refractive effect, for example, in the form of a nominal "progressive lens", the entire refractive power change range between the minimum refractive power in the channel region and the maximum refractive power in the refractive portion may preferably also be greater. Particularly preferably, over the entire length of the channel region between the upper and lower edges of the spectacle lens, the horizontal increase in refractive power towards the refractive portion or within the refractive portion is large enough to promote sufficient suppression of myopia development. Thus, specifically, the total refractive power change range between the minimum refractive power in the channel region and the maximum refractive power in the refractive portion is at least greater than the additional diopters within the channel region.

[0020] In particular, the channel region within the spectacle lens is bounded towards the refractive portion on both sides by a channel boundary line, which can be defined for each horizontal section through the spectacle lens as follows: Along the corresponding section, starting from the position of the minimum refractive power within the channel region towards the lateral side, the refractive power of the spectacle lens at the channel boundary line is first higher than the corresponding minimum refractive power (along the corresponding section within the channel region) by the channel tolerance value (which is in particular a characteristic of the channel region). Preferably, the (channel-specific) channel tolerance value is in the range of about 0.25 dpt to about 0.5 dpt, particularly 0.25 dpt, about 0.3 dpt, about 0.35 dpt, about 0.4 dpt, about 0.45 dpt, or about 0.5 dpt.

[0021] This way of defining the channel boundary by the orientation of the channel boundary line through the horizontal section passing through the spectacle lens is particularly advantageous for many preferred embodiments of the present invention, because it allows the orientation and extent of the channel region to be substantially independent of the orientation of the absolute value of the refractive power along the channel region (e.g., when there is an additional power in the case of progressive spectacle lenses as will be further explained below).

[0022] In a preferred embodiment, for at least 50%, preferably at least 60%, even 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 refractive action portions is at least higher than the minimum refractive power value along the corresponding section in the channel region by the minimum refractive action value (Minimalwirkungswert), where the minimum refractive action value is approximately 0.25 dpt, preferably approximately 0.5 dpt, even more preferably approximately 1 dpt, most preferably approximately 1.5 dpt higher than the minimum refractive value in the channel region, or approximately 0.25 dpt, preferably approximately 0.5 dpt, even more preferably approximately 1 dpt, most preferably approximately 1.5 dpt higher than the channel tolerance value.

[0023] In a preferred embodiment, for at least 50%, preferably at least 60%, even 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 refractive action portions have a refractive action increasing region directly adjacent to the channel region, the horizontal width of the refractive action increasing region is at least 5 mm, preferably at least 10 mm, even more preferably at least 20 mm, and within the refractive action increasing region, the refractive power increases monotonically (preferably, strictly monotonically) from the channel region towards the corresponding periphery.

[0024] In other words, in a preferred embodiment, for each horizontal section passing through the spectacle lens that intersects the channel region and (in particular on both sides) intersects the refractive action region, a corresponding boundary line can be defined between the channel region and the adjacent refractive action region, where starting from the position of the minimum refractive power in the channel region towards the (nasal and / or temporal) refractive action region within the corresponding section, the refractive power of the spectacle lens first exceeds a predetermined value (channel tolerance value) that is particularly 0.25 dpt or 0.5 dpt higher (i.e., higher than the said minimum refractive power in the channel region along the corresponding section) at the boundary line. In other words, the channel region is particularly defined such that the change in its refractive power in each horizontal section shall not be greater than the channel tolerance value that is particularly approximately 0.25 dpt or approximately 0.5 dpt.

[0025] Thus, on the one hand, the channel region is completely defined jointly by the mirror channel boundary lines on both sides and the edges of the spectacle lens (especially the upper and lower edges). Particularly preferably, for at least 50%, preferably at least 60%, even more preferably at least 70%, and most preferably at least 80% of the height of the spectacle lens, in each horizontal section passing through the spectacle lens, the refractive power in the refractive action region increases away from the corresponding channel boundary line until the corresponding maximum refractive power, and the amount of this increase is at least approximately 0.25 dpt, preferably at least approximately 0.5 dpt, even more preferably at least approximately 1 dpt, and most preferably at least approximately 1.5 dpt.

[0026] In a preferred embodiment, the channel region includes: - a central main viewing region; - a myopia region, which is arranged below the central main viewing region and extends from the central main viewing region to the lower edge of the spectacle lens; and - an upper channel portion, which is arranged above the central main viewing region and extends from the central main viewing region to the upper edge of the spectacle lens.

[0027] In a preferred embodiment, the spectacle lens has a substantially constant refractive power throughout the channel region, wherein there is a continuous line from the upper edge to the lower edge of the spectacle lens within the channel region, and the refractive power of the spectacle lens varies along this continuous line, and the amount of this variation does not exceed approximately 0.5 dpt, preferably does not exceed 0.25 dpt. Therefore, such a lens serves as a nominal "single vision lens".

[0028] Particularly preferably, the spectacle lens has (correspondingly) a substantially constant refractive power at least in the central main viewing region and the upper channel portion. For a nominal multifocal or "progressive lens", it is preferred that the spectacle lens has a higher average refractive power in the myopia region than in the central main viewing region.

[0029] In order to particularly handle the convergence of the viewing direction when dealing with myopia, it is preferred that the myopia region extends from the central main viewing region to the lower edge of the spectacle lens along a line (especially a straight line), and this line extends downward from the center of the central main viewing region (especially the centroid (Flächenschwerpunkt)) at an angle relative to the vertical direction on the nasal side, and this angle is in the range of approximately 0º to approximately 30º, preferably in the range of approximately 5º to approximately 20º, even more preferably in the range of approximately 8º to approximately 15º. In particular, the center point (such as the geometric center of gravity or the incenter) of the central main viewing region can be used as the center.

[0030] Preferably, the horizontal width of the upper channel portion (between the central main viewing area and the upper edge of the spectacle lens) is in the range of at least about 3 mm, preferably in the range of at least about 5 mm, even more preferably in the range of at least about 10 mm, and / or the horizontal width of the upper channel portion or at least the minimum horizontal width of the upper channel portion (i.e., at its narrowest part) is preferably in the range of not greater than about 30 mm, more preferably in the range of not greater than about 20 mm, even more preferably in the range of not greater than about 10 mm.

[0031] Preferably, the horizontal width of the myopia zone (between the central main viewing area and the lower edge of the spectacle lens) is in the 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 myopia zone or at least the minimum horizontal width of the myopia zone (i.e., at its narrowest part) is preferably in the range of not exceeding about 30 mm, preferably not exceeding about 20 mm, even more preferably not exceeding about 10 mm.

[0032] In a preferred embodiment, the (maximum) horizontal width of the central main viewing area is in the range of at least about 5 mm, preferably at least about 10 mm, even 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 the range of not exceeding about 35 mm, preferably not exceeding about 30 mm, more preferably not exceeding about 25 mm, most preferably not exceeding about 20 mm. More preferably, the spectacle lens is characterized in that the central main viewing area includes 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 is located 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. Among other features of the preferred embodiment, the refractive action area is located 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 the spectacle lens according to the preferred embodiment, this circular area is located within the central main viewing area.

[0033] Preferably, the maximum horizontal width of the central main viewing area is greater than the maximum width of the upper channel portion. Additionally or alternatively, the maximum horizontal width of the central main viewing area is preferably greater than the maximum width of the myopia area. This enables the provision of the largest field of view with a clear perception within the main viewing area while minimizing the reduction of the refractive action area. Since the refractive action area is thus increased in the area horizontal to the upper channel portion and / or the myopia area, the effect of suppressing myopia progression in such spectacle lenses can be significantly higher, while the compatibility of the spectacle lenses with the upper channel portion and / or the myopia area is improved or at least maintained.

[0034] The main viewing area is preferably formed in the vertical middle area of the spectacle lens, particularly in the middle third of the height. In particular, the upper channel portion is formed at the uppermost 30%, preferably 20%, more preferably 15%, even more preferably 10%, and most preferably 5% of the vertical height of the spectacle lens. In particular, the myopia area is additionally or alternatively formed at the lowermost 30% of the vertical height of the spectacle lens, preferably 20%, more preferably 15%, even more preferably 10%, and most preferably 5%. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below in conjunction with the drawings and by means of preferred embodiments.

[0036] Figure 1 A schematic diagram showing the respective areas on a spectacle lens according to a preferred embodiment;

[0037] Figure 2 A schematic diagram showing an exemplary refractive power distribution in a spectacle lens according to a preferred embodiment;

[0038] Figure 3 Showing the specific refractive power distribution in the spectacle lens. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] Figure 1 A schematic distribution of the respective areas on a spectacle lens 10 according to a preferred embodiment is shown. The channel area 12 extends continuously from the upper edge 14 to the lower edge 16 of the spectacle lens 10. When the correct prescription is applied to the corresponding eye, this channel area 12 serves as the clear vision area or prescription area of the spectacle lens 10, enabling the user to see clearly through this area because this area largely compensates for any visual defects of the eye.

[0040] In the illustrated embodiment, the channel region 12 is schematically divided into three parts: - a central main viewing region 20, which can be used in particular for the user's forward field of view (or for viewing the horizon in the distance); - a myopia region 22, which extends slightly downward on the nasal side from the central main viewing region 20 to the lower edge 16 of the spectacle lens 10, and - an upper channel part 24, which extends from the central main viewing region 20 to the upper edge 14 of the spectacle lens 10.

[0041] Generally (i.e., not only in the embodiment shown here), it is preferred that the upper channel part extends substantially along a vertical line, i.e., extends substantially vertically (in particular compared to the myopia region).

[0042] The channel region 12 is surrounded on the nasal side and the temporal side by a respective nasal refractive portion 18n and a temporal refractive portion 18t. In particular, the nasal refractive portion 18n and the temporal refractive portion 18t directly adjoin the channel region 12 along respective nasal channel boundary lines 26n and temporal channel boundary lines 26t. The two refractive portions 18n, 18t together form a refractive region (Wirkungsbereich), in which the spectacle lens 10 essentially has a higher refractive power than the prescription data achieved in the channel region. In other words, in particular over the entire length of the channel region 12, the refractive power of the spectacle lens 10 increases on both sides from the channel region 12 towards the refractive region (or the respective refractive portion), particularly in the region of the channel boundary lines 26n, 26t.

[0043] On the other hand, within the channel region, the refractive power of the spectacle lens is at least to some extent substantially constant. Particularly preferably, the refractive power of the spectacle lens 10 is substantially constant at least in the main viewing region 20 and the upper channel part 24. In order to achieve a nominal "single vision lens (Einstärkenglases)", the refractive power of the spectacle lens 10 is preferably substantially constant over the entire channel region 12. However, in the case where the present invention is used in combination with, for example, a progressive refractive effect (Gleitsichtwirkung), the refractive power of the spectacle lens 10 can be higher in the myopia region 22 than in the central main viewing region 20 according to the additional diopter specified in the (in particular individual) prescription.

[0044] From Figure 1As can be seen from the schematic diagram of the preferred embodiment, the central main viewing area 20 has the maximum horizontal width (between the channel boundary lines 26n and 26t), which is particularly greater than the minimum horizontal width of the myopia area 22 and the minimum horizontal width of the upper channel portion 24. Through the combination of the substantially constant refractive power in the central main viewing area 20 and the upper channel portion 24 and the smaller channel width in the upper channel portion 24 (at least in some parts or partially), a high effectiveness of the entire refractive action area in suppressing the development of myopia is achieved, and at the same time, an unexpectedly good tolerance of the glasses is also achieved. Compared with the concept of having a continuous refractive action area at the top, the concept described here mainly minimizes distortion and rocking refractive action. For this purpose, this improvement is achieved both for single vision lenses (i.e., when the entire channel area 12 has a substantially constant refractive power) and for progressive lenses (i.e., especially when the myopia area 22 has an additional power).

[0045] Figure 2 A schematic diagram showing an exemplary refractive power distribution in an ophthalmic lens according to a preferred embodiment is shown. In principle, this schematic diagram can particularly correspond to Figure 1 the ophthalmic lens 10 in Figure 2 wherein, from the specific distribution of the refractive power, it can be clearly seen that the embodiment shown here is a single vision lens. Here, similarly, the channel area 12 including the upper channel portion 24, the central main viewing area 20, and the myopia area 22 extends sequentially from the upper edge 14 to the lower edge 16 of the ophthalmic lens 10. The nasal refractive action portion 18n and the temporal refractive action portion 18t laterally adjoin this channel area 12.

[0046] Figure 2 The lines shown other than the entire edge orientation of the ophthalmic lens represent the lines (isoline) of the ophthalmic lens 10 having the same refractive power. For example, Figure 2 the refractive power spacing between adjacent lines in

[0047] can respectively represent a difference of 0.5 dpt. From this, it can be seen that the entire channel area is located in a region where the refractive power is substantially constant, which exactly corresponds to a single vision lens. The refractive power of the ophthalmic lens 10 in the channel area is not necessarily 0. It can be positive or negative. In fact, the present invention is particularly related to the negative refractive power of the ophthalmic lens 10 in the channel area because further development of myopia is more common, especially in the case where myopia already exists, and the ophthalmic lens according to the present invention is particularly suitable for this situation.

[0047] Regardless of the absolute value of the refractive power, Figure 2In the illustrated example, the spectacle lens 10 has the lowest refractive power in the channel region 12. Thus, towards the lateral refractive portions 18n, 18t, the refractive power of the spectacle lens 10 steadily increases and reaches its maximum value in the schematic illustration at approximately the middle height in the lateral edge regions of the spectacle lens 10, respectively.

[0048] For a preferred embodiment, the course and extent of the channel region 12 can be defined by the limiting values of the refractive power of the spectacle lens 10. Although in the generally particularly advantageous case of applying the invention to progressive lenses, the refractive powers can be compared along a horizontal section as described above, especially when applying the invention to single vision lenses, the course of the channel boundary lines for characterizing the channel region 12 of the preferred embodiment can also be defined using global refractive power limiting values based on the channel tolerance value. Thus, in the characterization of the preferred embodiment of the invention, especially for single vision lenses, the channel boundary lines can be defined as follows: When extending from a specific position within the channel region 12 towards the lateral refractive portions, the position at which the refractive power of the spectacle lens first exceeds the minimum refractive power within the (entire) channel region 12 by the channel tolerance value is the channel boundary line (this is especially a characteristic of the channel region). In addition, the channel tolerance value can be as described in the previous cases. Thus, referring Figure 2 to the schematic illustration in, the two isopters marked with the minimum refractive power can be used as the channel boundary lines 26n, 26t.

[0049] Finally, Figure 3 shows an exemplary specific refractive power distribution in a spectacle lens according to a preferred embodiment. The example dimensions in millimeters are given on the horizontal and vertical axes, and the isopters connect the positions with the same refractive power, respectively. It can be seen from the markings that in this case, the difference in refractive power values between adjacent isopters is 0.25 dpt. This is also a single vision lens.

[0050] List of reference signs

[0051] 10 Spectacle lens (Brillenglas)

[0052] 12 Channel region (Kanalbereich)

[0053] 14 Upper edge (oberer Rand)

[0054] 16 Lower edge (unterer Rand)

[0055] 18n Nasal refractive portion (nasaler Wirkungsabschnitt)

[0056] 18t Temporal refractive portion (temporaler Wirkungsabschnitt)

[0057] 20 Central main viewing area (zentraler Hauptdurchblicksbereich)

[0058] 22 Near-sight area (Nahsichtzone)

[0059] 24 Upper channel section (oberer Kanalabschnitt)

[0060] 26n Nasal channel boundary line (nasale Kanalgrenzlinie)

[0061] 26t Temporal channel boundary line (temporale Kanalgrenzlinie)

Claims

1. An eyeglass lens (10), which comprises: - A continuous channel region (12) that extends continuously from the upper edge (14) to the lower edge (16) of the eyeglass lens; and - Refractive effect regions (18n, 18t) that are horizontally adjacent to the continuous channel region (12) on both sides and extend continuously from the upper edge (14) to the lower edge (16) of the eyeglass lens (10) on each side, wherein the refractive power of the eyeglass lens (10) increases from the channel region (12) towards the refractive effect regions (18n, 18t) on both sides of the channel region (12).

2. The eyeglass lens (10) according to claim 1, wherein the horizontal width of the channel region at the upper edge and the lower edge of the eyeglass lens is less than the maximum horizontal width of the channel region.

3. The eyeglass lens (10) according to claim 1 or 2, wherein the channel region in the vertical middle region of the eyeglass lens has a maximum horizontal width that is greater than the minimum horizontal width of the channel region above, and / or greater than the minimum horizontal width of the channel region below.

4. The eyeglass lens (10) according to any one of the preceding claims, wherein the refractive effect region includes a nasal refractive effect portion (18n) and a temporal refractive effect portion (18t), and the nasal refractive effect portion and the temporal refractive effect portion are formed coherently respectively and are separated from each other by the channel region (12).

5. The eyeglass lens (10) according to claim 4, wherein the maximum refractive power in the nasal refractive effect portion (18n) and the maximum refractive power in the temporal refractive effect portion (18t) differ from each other by no more than approximately 3 dpt, preferably no more than approximately 2 dpt, even more preferably no more than approximately 1 dpt, most preferably no more than approximately 0.5 dpt, and / or wherein the maximum refractive power in both the nasal refractive effect region (18n) and the temporal refractive effect region (18t) is at least approximately 1 dpt greater than the minimum refractive power in the channel region (12), preferably at least approximately 1.5 dpt, more preferably at least approximately 2 dpt, even more preferably at least approximately 2.5 dpt, most preferably at least approximately 3 dpt.

6. The eyeglass lens (10) according to claim 4 or 5, wherein for at least 50% of the height of the eyeglass lens (10), preferably at least 60%, even more preferably at least 70%, most preferably at least 80%, in each horizontal cross-section, along the corresponding cross-section, the maximum refractive power in the nasal refractive effect portion and / or the temporal refractive effect portion is at least greater than the minimum refractive value in the channel region by the minimum refractive effect value, wherein, preferably, the minimum refractive effect value is greater than the minimum refractive value in the channel region by approximately 0.25 dpt, preferably approximately 0.5 dpt, even more preferably approximately 1 dpt, most preferably approximately 1.5 dpt.

7. The spectacle lens (10) according to any one of the preceding claims, wherein, the channel region (12) within the spectacle lens (10) is bounded on both sides by channel boundary lines, which are defined for each horizontal section through the spectacle lens as follows: along the respective section, starting from the position of the lowest refractive power within the channel region, the refractive power of the spectacle lens first exceeds the respective lowest refractive power by a channel tolerance value at the channel boundary lines.

8. The spectacle lens according to claim 7, wherein, the channel tolerance value is in the range of approximately 0.25 dpt to approximately 0.5 dpt, in particular 0.25 dpt, approximately 0.3 dpt, approximately 0.35 dpt, approximately 0.4 dpt, approximately 0.45 dpt or approximately 0.5 dpt.

9. The spectacle lens according to claim 7 or 8, wherein, the lowest refractive power value is greater than the channel tolerance value by approximately 0.25 dpt, preferably approximately 0.5 dpt, more preferably approximately 1 dpt, and most preferably approximately 1.5 dpt.

10. The spectacle lens (10) according to any one of the preceding claims, wherein, the channel region (12) comprises: - a central main viewing region (20); - a myopia region (22), which is arranged below the central main viewing region (20) and extends from the central main viewing region (20) to the lower edge (16) of the spectacle lens (10); and - an upper channel portion (24), which is arranged above the central main viewing region (20) and extends from the central main viewing region (20) to the upper edge (14) of the spectacle lens (10).

11. The spectacle lens (10) according to claim 10, which has a substantially constant refractive power in the central main viewing region (20) and the upper channel portion (24).

12. The spectacle lens (10) according to claim 10 or 11, which has a substantially constant refractive power in the central main viewing region (20) and the myopia region (22).

13. The spectacle lens (10) according to claim 10 or 11, which has a higher average refractive power in the myopia region (22) than in the central main viewing region (20).

14. The spectacle lens (10) according to any one of claims 10 to 13, wherein, the myopia region extends along a line, in particular along a straight line, from the central main viewing region to the lower edge of the spectacle lens, the line extending downward at an angle relative to the vertical direction from the center (in particular the centroid) of the central main viewing region on the nasal side, the angle being in the range of approximately 0º to approximately 30º, preferably in the range of approximately 5º to approximately 20º, and even more preferably in the range of approximately 8º to approximately 15º.

15. The spectacle lens according to any one of claims 10 to 14, wherein, The horizontal width of the upper channel portion is in the range of at least about 3 mm, preferably in the range of at least about 5 mm, more preferably in the range of at least about 10 mm, and / or wherein the horizontal width of the upper channel portion or at least the minimum horizontal width of the upper channel portion is in the range of not greater than about 30 mm, preferably in the range of not greater than about 20 mm, even more preferably in the range of not greater than about 10 mm.

16. The spectacle lens according to any one of claims 10 to 15, wherein, the horizontal width of the myopia zone is in the range of at least about 3 mm, preferably in the range of at least about 5 mm, more preferably in the range of at least about 10 mm, and / or wherein the horizontal width of the myopia zone or at least the minimum horizontal width of the myopia zone is in the range of not greater than about 30 mm, preferably in the range of not greater than about 20 mm, even more preferably in the range of not greater than about 10 mm.

17. The spectacle lens according to any one of claims 10 to 16, wherein, the horizontal width of the central main viewing area is in the range of at least about 5 mm, preferably in the range of at least about 10 mm, more preferably in the range of at least about 15 mm, most preferably in the range of at least about 20 mm, and / or wherein the horizontal width of the central main viewing area is in the range of not greater than about 35 mm, preferably in the range of not greater than about 30 mm, more preferably in the range of not greater than about 25 mm, most preferably in the range of not greater than about 20 mm.

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