Spectacle lens design data and method for manufacturing spectacle lenses

Abstract

Spectacle lens design data for manufacturing spectacle lenses related to a wearer is provided. The eyeglass lens has a refractive power and at least a partial diffractive additional power, and is provided with a central region having a first diffractive additional power and being adapted to effect emmetropia of the wearer. The spectacle lens is further provided with a peripheral region disposed radially outward of the central region, where the peripheral region has a second diffractive additional power and is adapted to provide a focus in at least one of a front of the wearer's retina or a rear of the wearer's retina. The spectacle lens design data is adjusted such that the spectacle lens further has a first transition region arranged between the central region and the peripheral region, where the first transition region is adapted to adjust a diffraction efficiency from a first diffraction additional power to a second diffraction additional power in a radially outward direction. The spectacle lens has a uniform refractive power extending over at least a central region, a peripheral region, and a first transition region. The uniform refractive power is adjusted to provide focus in front of the retina of the wearer. The central region has a negative diffractive additional power such that a combination of the uniform refractive power and the negative diffractive additional power in the central region is adjusted to achieve emmetropia of the wearer.

Description

[0001] Embodiments are provided of: spectacle lens design data for using spectacle lens design data to manufacture spectacle lenses related to a wearer; a data set in the form of a computer-readable data signal; a data signal carrying the data set according to the present disclosure; a method for manufacturing spectacle lenses; and spectacle lenses related to a wearer. Thus, the embodiments relate to spectacle lenses.

[0002] It can be observed that myopia (i.e., nearsightedness) is increasing globally. Especially in Asia, a significant increase in the number of myopic people has been observed. Myopia refers to a refractive error in which, when the eye is in a relaxed state of accommodation, the image of an object located at an infinite distance appears in a plane in front of the retina, and the light falling on the retina correspondingly presents as a defocused image. Generally, myopia is a refractive error that deteriorates over time due to the fact that the refractive error eye becomes longer over time and thus the distance of the image plane itself from the retina becomes greater.

[0003] The cause of myopia is thought to have many factors, and the mechanism of abnormal axial length growth of the eyeball has not been fully understood. Therefore, myopia was previously considered incurable or irreversible. Here, correcting myopia with spectacle lenses or refractive corneal surgery can be considered as counteracting the symptoms, because the abnormal axial length growth of the eyeball does not reverse.

[0004] The prior art has disclosed various solutions for controlling myopia development or myopia progression, such as using bifocal spectacle lenses and progressive power spectacle lenses (especially for children), rigid gas-permeable contact lenses for children, orthokeratology (ortho-k) contact lenses, topical application of drugs for controlling accommodation, visual training, or maximizing the time spent outdoors. Although some of these known solutions may slow down the progression of myopia in certain cases, none of these known solutions can produce a verifiable effect of completely eliminating myopia or completely stopping the progression of myopia.

[0005] In addition to treatment with drugs (such as atropine or pirenzepine), which is not without problems due to side effects (especially for children), orthokeratology (ortho-k) is one of the most effective known regimens for slowing the progression of myopia. Due to the corneal flattening caused by orthokeratology contact lenses and its accompanying corneal shape changes, the mainstream view is that changes in the peripheral retinal refractive pattern are the reason for the effect of orthokeratology lenses on myopia progression and axial length growth of the eye. However, there are also risks associated with orthokeratology treatment, such as microbial keratitis, corneal discoloration, epithelial iron deposition, obvious fibrous streaks, and changes in corneal biomechanical properties. In addition, the ideal application of orthokeratology contact lenses requires the contact lenses to have a high degree of adaptability, strict compliance with usage and cleaning specifications, regular routine examinations, and comprehensive and appropriate treatment of the eyes in case of complications. Additionally, there may be ethical considerations in applying contact lenses to pediatric patients, as the contact lenses cause significant deformation of the cornea overnight and have an irreversible impact on corneal oxygen supply.

[0006] WO 2004 / 107024 A1 describes a method and apparatus for controlling optical aberrations to alter the modulation transfer function by providing an ocular system that includes a predetermined correction factor to generate a substantially corrected stimulus for repositioning the mid-spatial frequency peak and the high-spatial frequency peak relative to each other, thereby altering accommodation lag.

[0007] WO 2005 / 055891 A1 describes a method and apparatus for controlling optical aberrations to alter the relative curvature of the image field.

[0008] WO 2006 / 124198 A1 describes a multifocal ophthalmic lens that includes a lens element having a front surface and a rear surface, the lens element having a central aspheric refractive zone disposed on one of the front surface and the rear surface, and a diffractive bifocal zone disposed outside the aspheric refractive zone. The central aspheric refractive zone may be disposed on the front surface, and the diffractive bifocal zone may be disposed on the rear surface.

[0009] WO 2021 / 181304 A1 describes an ophthalmic lens for treating myopia, the ophthalmic lens comprising: a base lens having a front surface, a rear surface and a first dioptric profile selected to correct or substantially correct the eye's ametropia at distance; one or more myopia control elements on at least one of the front and rear surfaces of the lens; a first visual zone having dimensions selected at least in part based on the concentration of a medicament used in combination with the ophthalmic lens, the first visual zone configured to minimize, reduce and / or eliminate visual impairment of distance vision; and a second visual zone including a relatively more positive dioptric profile compared to the first visual zone; wherein at least one of the size of the second visual zone and the relatively more positive dioptric power of the second visual zone is selected at least in part based on the concentration of the medicament. The lens appears to be used in combination with a drug.

[0010] WO 2007 / 041796 A1 describes an ophthalmic lens element for correcting myopia of a wearer's eye. The lens element includes a central region and a peripheral region. The central region provides a first optical correction for substantially correcting myopia associated with the foveal region of the wearer's eye. The peripheral region surrounds the central region and provides a second optical correction for substantially correcting myopia or hyperopia associated with the peripheral region of the retina of the wearer's eye.

[0011] CN 104678572 describes a glass lens. The glass lens can exhibit a function of suppressing the development of eye ametropia and, at the same time, can ensure sufficient visibility and a good wearing feeling. The glass lens includes a first refractive region and a second refractive region, wherein each first refractive region has a first refractive power based on a prescription for correcting eye ametropia; each second refractive region has a refractive power different from the first refractive power and has a function of focusing an image at a position outside the retina of the eye to suppress the development of eye ametropia, wherein, near the central portion of the lens, the second refractive region forms a plurality of independent island-like regions, and the first refractive region forms a region outside the region of the second refractive region.

[0012] US10268050 B2 describes an ophthalmic lens that can suppress eye ametropia and ensure sufficient visibility. The ophthalmic lens includes: a first refractive region and a second refractive region. Each first refractive region has a first refractive power that can be based on a prescription for correcting eye ametropia. Each second refractive region has a refractive power different from the first refractive power and can be used to focus an image at a position outside the retina of the eye to suppress the development of ametropia. Near the central portion of the lens, the second refractive region forms a plurality of independent island-like regions, and the first refractive region forms a region outside the region of the second refractive region.

[0013] EP 3759548 A1 describes a lens element designed to be worn in front of a person's eyes. The lens element includes: a refractive region having a refractive power based on the prescription of the person's eyes; and a plurality of at least three non-adjacent optical elements, with at least one optical element having an aspherical optical function.

[0014] CN 112 649 971A describes an ophthalmic lens including a central refractive region and a peripheral diffraction region. The peripheral diffraction region is divided into full annular, semi-annular, and sector-annular shapes, and the semi-annular and sector-annular shapes are divided into a nasal-side peripheral diffraction region and a temporal-side peripheral diffraction region.

[0015] CN 115 453 771A describes a multifocal Fresnel spectacle lens with myopia treatment and correction functions and its manufacturing method. The treatment and correction functions are integrated into a single Fresnel lens, and the special annular structure of the Fresnel lens is used to divide the curved surface of the common lens into multiple segments of equal thickness.

[0016] US2009 / 046349 A1 describes a lens system having a diffractive power region. The diffractive power region has a plurality of concentric surface relief diffraction structures. Light incident on the diffraction structures near the center point contributes more to the optical power than light incident on the diffraction structures circumferentially spaced therefrom.

[0017] US2009 / 088840 A1 describes multifocal ophthalmic lenses (e.g., multifocal intraocular lenses) that employ a central refractive region for providing refractive focusing power and a diffraction region for providing two diffractive focusing powers. In many cases, the refractive focusing power provided by the central region of the lens corresponds to the distance vision focusing power, which is substantially equal to one of the two diffractive focusing powers, and the other diffractive focusing power corresponds to the near vision focusing power.

[0018] US 5 699 142 A describes a diffractive multifocal ophthalmic lens including a apodization region having diffractive steps with smoothly decreasing step heights to transfer the energy balance from the near vision image to the distance vision image, thereby reducing the glare perceived when viewing discrete distant light sources.

[0019] WO 2022 / 254389 A1 describes an ophthalmic lens for myopia control, which includes a pattern or mask that blocks light and / or attenuates light, for example, by amplitude modulation. The amplitude modulation can be binary, for example, where zero amplitude means absorbing or blocking light, and a value of one means that light can transmit through the lens without change.

[0020] WO 2014 / 198972 A1 describes a lens that can be implemented as both a contact lens and an intraocular lens, the thickness of the lens being obtained in both cases by an iterative process and depending on the aperiodic ordered step function Gs(u), where S is the number of iterations and is equal to or less than 2. The contact lens is for controlling myopia. The lens production method starts from a given refractive lens and includes modifying the surface of the lens by means of the step function Gs(u), where S is equal to or less than 2. The lens can have a central refractive zone and a peripheral diffraction zone.

[0021] Although WO 2014 / 198972 A1 relates to different technical fields (i.e., contact lenses and intraocular lenses), it can be considered the closest prior art to the claimed subject matter.

[0022] The subject matter of claim 1 differs from WO 2014 / 198972 A1 at least in that it claims a spectacle lens and further distinguishing features, according to which the spectacle lens includes a first transition region arranged between a central region and a peripheral region, wherein the first transition region is adapted to adjust the diffraction efficiency from a first diffractive additional dioptric power to a second diffractive additional dioptric power in a radially outward direction.

[0023] In view of the closest prior art and the distinguishing features, the objective technical problem can be considered to be applying a multifocal diffractive-refractive hybrid design for myopia control to a spectacle lens.

[0024] This problem is solved by spectacle lens design data for manufacturing a spectacle lens, a spectacle lens, a data set in the form of a computer-readable data signal, a data signal carrying the data set according to the present disclosure, a computer-readable storage medium having stored thereon the data set according to the present disclosure, and a method for generating spectacle lens design data for a spectacle lens. Optional embodiments are provided in the dependent claims and the description.

[0025] In one aspect, there is provided a spectacle lens. The spectacle lens has a refractive dioptric power and at least a partial diffractive additional dioptric power, and is provided with a central region having a first diffractive additional dioptric power and adjusted to achieve emmetropia of the wearer. Further, the spectacle lens design data is adjusted such that the spectacle lens has a peripheral region arranged radially outside the central region, wherein the peripheral region has a second diffractive additional dioptric power and is adjusted to provide a focal point in front of and / or behind the retina of the wearer. The spectacle lens design data is characterized in that it is adjusted such that the spectacle lens further has a first transition region arranged between the central region and the peripheral region, wherein the first transition region is adapted to adjust the diffraction efficiency from a first diffractive additional dioptric power to a second diffractive additional dioptric power in a radially outward direction.

[0026] The solution to the above problems is fully achieved by the features described in the foregoing paragraphs.

[0027] However, starting from the closest prior art, a person skilled in the art, in order to complete the task of solving the objective technical problem, would only use a multifocal diffractive-refractive hybrid scheme for myopia control to provide a central refractive region and a peripheral diffractive region at the spectacle lens. However, a person skilled in the art would not have any motivation to provide a transition zone. Therefore, although such a scheme can solve the objective technical problem, it deviates from the subject matter of claim 1. Therefore, such a scheme does not render the subject matter of claim 1 obvious.

[0028] On the other hand, there is provided spectacle lens design data for manufacturing a spectacle lens related to a wearer. The spectacle lens has a refractive power and at least a partially diffractive addition power, and is provided with a central region having a first diffractive addition power and adjusted to achieve emmetropia of the wearer. Further, the spectacle lens design data is adjusted such that the spectacle lens has a peripheral region arranged radially outside the central region, wherein the peripheral region has a second diffractive addition power and is adjusted to provide a focal point in front of or behind the retina of the wearer. The spectacle lens design data is characterized in that it is adjusted such that the spectacle lens further has a first transition region arranged between the central region and the peripheral region, wherein the first transition region is adapted to adjust the diffractive efficiency from the first diffractive addition power to the second diffractive addition power in a radially outward direction. The spectacle lens has a uniform refractive power extending at least over the central region, the peripheral region and the first transition region. The uniform refractive power is adjusted to provide a focal point in front of the retina of the wearer. The central region has a negative diffractive addition power such that the combination of the uniform refractive power and the negative diffractive addition power in the central region is adjusted to achieve emmetropia of the wearer.

[0029] In yet another aspect, there is provided spectacle lens design data for manufacturing spectacle lenses related to a wearer. The spectacle lens has a refractive power and at least a partial diffractive addition power, and is provided with a central region having a first diffractive addition power and adjusted to achieve emmetropia of the wearer. In addition, the spectacle lens design data is adjusted such that the spectacle lens has a peripheral region disposed radially outward of the central region, wherein the peripheral region has a second diffractive addition power and is adjusted to provide a focus in front of or behind the wearer's retina. The spectacle lens design data is characterized in that it is adjusted such that the spectacle lens further has a first transition region disposed between the central region and the peripheral region, wherein the first transition region is adapted to adjust the diffraction efficiency from the first diffractive addition power to the second diffractive addition power in a radially outward direction. The peripheral region has a positive diffractive addition power and a negative diffractive addition power provided by one or more positive diffraction orders and one or more negative diffraction orders.

[0030] In yet another aspect, there is provided spectacle lens design data for manufacturing spectacle lenses related to a wearer. The spectacle lens has a refractive power and at least a partial diffractive addition power, and a central region is provided, the central region having a first diffractive addition power of zero and adjusted to achieve emmetropia of the wearer. In addition, the spectacle lens design data is adjusted such that the spectacle lens has a peripheral region disposed radially outward of the central region, wherein the peripheral region has a second diffractive addition power and is adjusted to provide a focus in front of or behind the wearer's retina. The spectacle lens design data is characterized in that it is adjusted such that the spectacle lens further has a first transition region disposed between the central region and the peripheral region, wherein the first transition region is adapted to adjust the diffraction efficiency from the first diffractive addition power of zero to the second diffractive addition power in a radially outward direction. The spectacle lens has a uniform refractive power extending at least over the central region, the peripheral region, and the first transition region. The uniform refractive power is adjusted to achieve emmetropia of the wearer.

[0031] In addition, there is provided a spectacle lens manufactured using the spectacle lens design data according to the present disclosure.

[0032] Furthermore, there is provided a data set in the form of a computer-readable data signal. The data set includes at least one of the following types of data: (i) a virtual representation of a spectacle lens configured to be used for manufacturing a spectacle lens according to the present disclosure, and (ii) data including computer-readable instructions for controlling one or more manufacturing machines to manufacture a spectacle lens according to the present disclosure.

[0033] In addition, there is a data signal carrying the data set according to the present disclosure.

[0034] In addition, a computer-readable storage medium is provided, on which a data set according to the present disclosure is stored.

[0035] Furthermore, a method is provided that is configured to generate spectacle lens design data for a spectacle lens by means of a computer device, the spectacle lens design data being adjusted such that the spectacle lens has a refractive power and at least a partial diffractive addition power and the spectacle lens is provided with a central region and a peripheral region, the central region having a first diffractive addition power and being adjusted to achieve emmetropia for the wearer, the peripheral region being arranged radially outside the central region, wherein the peripheral region has a second diffractive addition power and is adjusted to provide a focal point in at least one of in front of the wearer's retina or behind the wearer's retina. The spectacle lens design data is characterized in that it is adjusted such that the spectacle lens further has a first transition region arranged between the central region and the peripheral region, wherein the first transition region is adapted to adjust the diffraction efficiency from the first diffractive addition power to the second diffractive addition power in a radially outward direction. The method may further be configured to manufacture a spectacle lens using the spectacle lens design data.

[0036] In yet another aspect, a method is provided that is configured to generate spectacle lens design data for a spectacle lens by means of a computer device, the spectacle lens design data being adjusted such that the spectacle lens has a refractive power and at least a partial diffractive addition power and the spectacle lens provides a central region and a peripheral region, the central region having a first diffractive addition power and being adjusted to achieve emmetropia for the wearer, the peripheral region being arranged radially outside the central region, wherein the peripheral region has a second diffractive addition power and is adjusted to provide a focal point in at least one of in front of the wearer's retina or behind the wearer's retina. The spectacle lens design data is characterized in that it is adjusted such that the spectacle lens further has a first transition region arranged between the central region and the peripheral region, wherein the first transition region is adapted to adjust the diffraction efficiency from the first diffractive addition power to the second diffractive addition power in a radially outward direction. The spectacle lens has a uniform refractive power that extends at least over the central region, the peripheral region, and the first transition region. The uniform refractive power is adjusted to provide a focal point in front of the wearer's retina. The central region has a negative diffractive addition power such that the combination of the uniform refractive power and the negative diffractive addition power in the central region is adjusted to achieve emmetropia for the wearer.

[0037] In yet another aspect, a method is provided that is configured to generate spectacle lens design data for a spectacle lens by means of a computer device, the spectacle lens design data being adjusted such that the spectacle lens has a refractive power and at least partial diffractive additional power and the spectacle lens provides a central region and a peripheral region, the central region having a first diffractive additional power and being adjusted to achieve emmetropia of the wearer, the peripheral region being arranged radially outside the central region, wherein the peripheral region has a second diffractive additional power and is adjusted to provide a focal point in at least one of in front of the wearer's retina or behind the wearer's retina. The spectacle lens design data is characterized in that it is adjusted such that the spectacle lens further has a first transition region arranged between the central region and the peripheral region, wherein the first transition region is adapted to adjust the diffraction efficiency from the first diffractive additional power to the second diffractive additional power in a radially outward direction. The peripheral region has positive diffractive additional power and negative diffractive additional power provided by one or more positive diffraction orders and one or more negative diffraction orders.

[0038] In yet another aspect, a method is provided that is configured to generate spectacle lens design data for a spectacle lens by means of a computer device, the spectacle lens design data being adjusted such that the spectacle lens has a refractive power and at least partial diffractive additional power and the spectacle lens provides a central region and a peripheral region, the central region having a first diffractive additional power and being adjusted to achieve emmetropia of the wearer, the peripheral region being arranged radially outside the central region, wherein the peripheral region has a second diffractive additional power and is adjusted to provide a focal point in at least one of in front of the wearer's retina or behind the wearer's retina. The spectacle lens design data is characterized in that it is adjusted such that the spectacle lens further has a first transition region arranged between the central region and the peripheral region, wherein the first transition region is adapted to adjust the diffraction efficiency from the first diffractive additional power to the second diffractive additional power in a radially outward direction. The spectacle lens has a uniform refractive power extending at least over the central region, the peripheral region and the first transition region. The uniform refractive power is adjusted to achieve emmetropia of the wearer.

[0039] The spectacle lens may meet the specifications of Section 3.5.2 of ISO 13666:2019(E)). In particular, the spectacle lens may be an ophthalmic lens according to Section 3.5.1 of ISO 13666:2019(E) that is worn in front of the eye but does not touch the eye.

[0040] Eyeglass lens design data can be any kind of information that enables the manufacture of an eyeglass lens having the specifications provided by the eyeglass lens design data. In particular, the design data can include information about the geometry of the front surface, the back surface, and optionally the edge profile. Additionally, the design data can include information about one or more materials from which the eyeglass lens can be constructed or which the eyeglass lens can include. Further, the design data can include information about various parameters (such as refractive index) specifying the eyeglass lens, one or more diffractive structures or patterns applied to the eyeglass lens, centering information (such as a centering point, a viewing point), the position and / or appearance of at least one optical mark, and / or any other characteristics facilitating the manufacture of the eyeglass lens.

[0041] Throughout this disclosure, the characteristics explained with respect to eyeglass lenses and the disclosure provided should be considered as being explained and disclosed with respect to eyeglass lens designs and eyeglass lens design data, and vice versa.

[0042] The wearer can be a person suffering from a refractive disorder, particularly myopia, where the eyeglass lens design data and the eyeglass lens manufactured according to the eyeglass lens design data are provided for at least partially treating the refractive disorder when worn by the wearer. The eyeglass lens design can particularly provide a refractive power and a diffractive additional power for at least partially compensating for and / or treating the refractive disorder. In particular, the wearer may suffer from myopia, and one of the purposes of the eyeglass lens design data and the corresponding eyeglass lens can be to mitigate and / or slow down the progression of myopia.

[0043] The central region of the eyeglass lens can be arranged at the center of the eyeglass lens. According to section 3.2.15 of ISO 13666:2019(E), the center of the eyeglass lens can correspond to the optical center of the eyeglass lens.

[0044] As generally used, the term "optical power" is the collective term for the spherical vertex power of an eyeglass lens (which brings a paraxial parallel beam of light to a single focus and which is typically considered in a prescription by the "sphere" value or the abbreviation "sph") and the cylindrical vertex power (which brings a paraxial parallel beam of light to two separate focal lines that are mutually at right angles (section 3.10.2 of ISO 13666:2019(E)) and which is typically considered in a prescription by the "cylinder" value or the abbreviation "cyl"). "Vertex power" is the reciprocal of the paraxial vertex focal length (section 3.10.7 of DIN EN ISO 13666:2019(E)). The optical power can include the spherical power and the astigmatic vertex power of the eyeglass lens according to section 3.5.2 of ISO 13666:2019(E) (according to section 3.10.7 of ISO 13666:2019(E)).

[0045] The refractive power of an ophthalmic lens may be the optical power controlled by the refraction of light in the lens material and the geometry of the ophthalmic lens, in particular the shape of the front surface and / or the back surface of the ophthalmic lens. The refractive power may be uniform across the entire ophthalmic lens. In other words, the ophthalmic lens may not have different zones exhibiting different refractive indices. The properties explained for the ophthalmic lens may correspondingly apply to the ophthalmic lens design data. The refractive power may be zero, i.e., the ophthalmic lens may have a refractive power of zero completely or in one or more zones. This is especially the case for ophthalmic lenses provided solely for the purpose of reducing myopia and / or slowing down the progression of myopia without compensating for any other refractive anomalies of the wearer.

[0046] The diffractive addition power may be the optical power provided by a diffractive structure applied to the ophthalmic lens. The term "diffractive addition power" indicates that the diffractive power may be added to the refractive power that may be present, where the diffractive power is added to the refractive power and thus contributes to the overall optical power. The diffractive addition power may be positive or negative. However, since the refractive power of the entire ophthalmic lens and / or one or more zones of the ophthalmic lens may be zero, the diffractive addition power should also be considered as the diffractive addition power if no refractive power is available. In addition, for one or more zones of the ophthalmic lens, the diffractive addition power may be zero. However, the corresponding zone of the ophthalmic lens may be said to have a diffractive addition power, but the diffractive addition power is zero. Thus, the first diffractive addition power or the second diffractive addition power may be zero. Different zones of the ophthalmic lens may be provided with different diffractive structures and thus have different diffractive addition powers.

[0047] The diffractive structure applied to the ophthalmic lens may provide different diffractive addition powers simultaneously in the same zone of the ophthalmic lens. This may be achieved by providing a diffractive structure having a corresponding diffractive efficiency. For example, the diffractive efficiency of the diffractive structure in a particular zone of the ophthalmic lens may be adapted to diffract light into a number of different diffraction orders. For example, the diffractive efficiency of the diffractive structure in a zone of the ophthalmic lens may be adapted to diffract light into multiple positive diffraction orders, and / or multiple negative diffraction orders, and / or one or more positive diffraction orders and one or more negative diffraction orders. The positive diffraction orders may result in an effective optical power higher than the optical power provided by the refractive power of the ophthalmic lens, and thus may result in an effective focal length of the corresponding zone of the ophthalmic lens being shorter than the effective focal length of the corresponding zone without the diffractive structure. The negative diffraction orders may result in an effective optical power lower than the optical power provided by the refractive power of the ophthalmic lens, and thus may result in a longer effective focal length. Different diffraction orders may result in different focal shifts and thus may result in an additional optical power different from the refractive power of the ophthalmic lens. Alternatively, the diffractive structure may be adapted to diffract light partially into positive or negative diffraction orders and partially into the zero diffraction order.

[0048] The central region, the peripheral region, the edge region, the first transition region, the second transition region, and the edge region are referred to as regions of an eyewear lens. These regions can be arranged in a concentric manner at the eyewear lens. However, alternatively, these regions extend around the central region in a non-concentric manner. These regions can be provided in a circular or non-circular manner. In particular, these regions can differ from each other by having different diffraction structures applied thereto and thus by providing different diffraction additional powers by the respective regions. All regions can have the same refractive power, i.e., the refractive power can be uniform across the entire eyewear lens. When the eyewear lens is worn by a wearer, different regions can relate to different visual angle ranges. Regions arranged at a larger radius of the eyewear lens can relate to visual angle ranges having larger visual angles, at which these visual angle ranges deviate from a central axis extending through the central region.

[0049] Some of these regions, in particular the diffractive power regions, can include a plurality of zones, which can be arranged in a radially concentric manner. These zones can differ from each other in radial position and / or extent of extension and / or in the refractive power and / or diffractive additional power provided in the respective zones. Additionally, the diffractive power region can include a plurality of zones that can represent Fresnel zones, as described, for example, in EP 1194797 B1. The Fresnel zones can form part of a diffraction structure provided in the diffractive additional power region. Each or some of these zones can include a plurality of sub-zones. Each or some of these zones can include a main sub-zone and a phase sub-zone, and the main sub-zone and the phase sub-zone can be adapted to control the relative phase shift of the wavefronts provided by different zones, as described, for example, in EP 1194797 B1.

[0050] Adjusting the peripheral region to provide a focus in front of or behind the wearer's retina means that the peripheral region provides defocus with respect to the focus of the central region adjusted to achieve emmetropia. Accordingly, the peripheral region can be adjusted to have a higher and / or lower optical power than the central region. Optionally, the peripheral region can be adjusted to provide a bifocal optical power, thus providing positive defocus and negative defocus compared to the central region. This can be achieved by providing respective diffractive additional powers that can be based on positive and negative diffraction orders.

[0051] The method can be a computer-implemented method, which means that some or all of the method steps can be performed by a computer and / or using a computer.

[0052] The virtual representation of an ophthalmic lens can be any kind of information that enables the manufacture of an ophthalmic lens with the specifications provided by the ophthalmic lens design data. In particular, the virtual representation of an ophthalmic lens can include information about the geometry of the front surface, the back surface, and optionally the edge profile. Additionally, the virtual representation of an ophthalmic lens can include information about one or more materials from which the ophthalmic lens can be constructed or which the ophthalmic lens can include. Further, the virtual representation of an ophthalmic lens can include information about various parameters (such as refractive index) specifying the ophthalmic lens, one or more diffractive structures or patterns applied to the ophthalmic lens, centration information (such as centration points, viewpoints), the position and / or appearance of at least one optical mark, and / or any other characteristics that facilitate the manufacture of the ophthalmic lens. The virtual representation of an ophthalmic lens can be regarded as a digital twin of the ophthalmic lens.

[0053] As commonly used, the term "emmetropia" refers to the situation where the optical power of the optical components of the eye (i.e., the cornea and the lens) and the optical power of an ophthalmic lens correcting the refractive error of the eye match the length of the eyeball such that a far point source is focused onto the retina. In the context of the present disclosure, a perfect compensation of the refractive error of the eye by the optical power of the ophthalmic lens within a deviation of ±0.2 D (which represents the maximum allowable deviation for ophthalmic lenses according to DIN EN ISO 8980-1 and 2) or less can still be considered to provide emmetropia. Emmetropia can be provided for the eyes of an (intended) wearer of an ophthalmic lens having a predetermined refractive error.

[0054] An advantage provided by the present disclosure is that ophthalmic lens design data can be provided so as to provide different optical powers in different regions of the ophthalmic lens. This allows the provided ophthalmic lens to have different optical powers for different viewing angles of the wearer wearing the ophthalmic lens. This effect can be used to compensate for and / or treat and / or slow down the progression of myopia. In particular, this can be used to achieve emmetropia of the wearer in the central region of the ophthalmic lens, i.e., to have a complete compensation of the refractive anomaly of the wearer in the central region of the ophthalmic lens, while having effective positive defocus and / or defocus blur in the outer regions (i.e., at larger viewing angles). This allows the light transmitted through the central region to be focused onto the retina of the wearer, while the light transmitted through the outer regions is focused at a shorter focal length within the eye in front of the retina of the wearer. This can be beneficial for slowing down the progression of myopia.

[0055] In addition, an advantage provided by the present disclosure is that different optical powers in different regions can be achieved based only on different diffraction structures in different regions, and thus, it is not necessarily required to change the refractive power of the spectacle lens. This can allow for the provision of a spectacle lens design having a uniform refractive power across the entire spectacle lens, since the desired differences in diffractive addition power can be achieved by providing diffraction structures. This can contribute to the manufacturing process of the spectacle lens and thus reduce the manufacturing cost.

[0056] Moreover, an advantage provided by the present disclosure is that a sharp boundary in the optical power of the spectacle lens can be avoided, since the first transition region can ensure a smooth transition between the central region and the peripheral region that may have a significant difference in diffractive addition power. Since the first transition region adjusts the diffraction efficiency from the first diffractive addition power in the central region to the second optical power in the peripheral region, a rapid change in optical power at the boundary between the central region and the peripheral region can be avoided, and thus the perceived optical quality of the spectacle lens experienced by the wearer can be improved.

[0057] In addition, an advantage provided by the present disclosure is that optical power can be added for a wide range of peripheral viewing angles by diffractive addition power. This provides a high degree of freedom in designing spectacle lenses for the purpose of myopia alleviation.

[0058] Another advantage that the present disclosure can provide is a high degree of freedom in customizing the spectacle lens for the intended wearer. The refractive and / or diffractive characteristics of the spectacle lens can be used to adjust the spectacle lens design to the wearer's predetermined characteristics (such as vertex distance and / or biometric characteristics (such as axial length of the eye)) and / or the wearer's wearing habits.

[0059] The spectacle lens can have a uniform refractive power extending at least over the central region, the peripheral region, and the first transition region. Optionally, the spectacle lens can have a uniform refractive power across the entire spectacle lens. Thus, with respect to the refractive power, the spectacle lens can be set as a single-focus lens. Correspondingly, the spectacle lens can be made of a single material having one refractive index, i.e., without a distribution of different materials having different refractive indices. This can contribute to the manufacturing of the spectacle lens. In addition, the curvature of the rear surface can be adjusted to achieve a single-focus lens.

[0060] The uniform refractive power can be adjusted to achieve emmetropia of the wearer, wherein the central region can have a diffractive addition power of zero.

[0061] Accordingly, the central region can be adjusted to correct the refractive anomaly of the wearer using only the refractive power of the spectacle lens. According to this alternative embodiment, no diffractive addition power may be provided in the central region. This can allow for a reliable correction of the wearer's refractive anomaly in the central region while minimizing possible optical aberrations. Thus, when only the refractive power is provided in the central region, high imaging quality can be achieved, which can thus lead to good wearer satisfaction.

[0062] The peripheral region may have a positive diffractive addition power provided by one or more positive diffractive orders. In particular, the peripheral region may have only a positive diffractive addition power provided by one or more positive diffractive orders. This adds a focal shift to the refractive power of the spectacle lens and thus adds positive power. Accordingly, this can make the effective focal length of the peripheral region of the spectacle lens shorter compared to the central region that does not have a diffractive addition power. Accordingly, the central region can be adjusted to focus the light transmitted through the central region onto the retina of the wearer to achieve emmetropia, while focusing the light transmitted through the peripheral region in front of the retina with a shorter focal length. This causes a positive defocus of the visual angle corresponding to the peripheral region for the wearer, which may be suitable for slowing down the myopia progression of the wearer. An advantage that this configuration can provide is that the possible longitudinal chromatic aberration of the refractive power of the spectacle lens can be at least partially compensated by the diffractive addition power.

[0063] Optionally, the peripheral region may have a positive diffractive addition power and a negative diffractive addition power provided by one or more positive diffractive orders and one or more negative diffractive orders. This may result in the light seen by the wearer within the visual angle range being blurred, which can support slowing down the myopia progression of the wearer and / or at least partially curing myopia.

[0064] The first transition region may be based on a bifocal diffraction efficiency that has a non-zero diffraction efficiency in the diffractive order corresponding to the first diffractive addition power and a non-zero diffraction efficiency in the diffractive order corresponding to the second diffractive addition power. In other words, the first transition region may have a diffraction efficiency that includes diffractive powers that are the same or similar to the first diffractive power of the central region and the second diffractive power of the peripheral region. "Non-zero diffraction efficiency" means that the diffraction efficiency of a particular diffractive order is higher than zero, i.e., some diffracted light is diffracted into the particular diffractive order. If the diffractive addition power of the central region or the peripheral region is zero, the corresponding diffraction efficiency of the first transition region can be adjusted to have a non-zero diffraction efficiency in the zero-order diffractive order. For example, if the peripheral region has a positive diffractive addition power, the first transition region may have a non-zero diffraction efficiency on at least one positive diffractive order that matches the positive diffractive addition power of the peripheral region. This can allow for a smooth gradual adjustment of the diffractive power of the spectacle lens between the central region and the peripheral region and thus enhance wearer satisfaction.

[0065] The second transition region can be based on a bifocal diffraction efficiency that has a non-zero diffraction efficiency in the diffraction order corresponding to the second diffractive addition power and a non-zero diffraction efficiency in the zero-order diffraction order. This can be particularly suitable for transferring the diffractive addition power of the spectacle lens from a first diffractive addition power to a second diffractive addition power in a radially outward direction. The first transition region can be adapted to transfer the diffraction efficiency from the zero-order diffraction order to one or more positive and / or negative diffraction orders in the peripheral region in a radially outward direction.

[0066] The first transition region and / or the second transition region can have a radial lattice structure, such as a radial periodicity of a diffraction structure, which corresponds to the periodicity of the diffraction structure provided in the peripheral region or the central region to provide the first diffractive power or the second diffractive power. When observed in terms of the square radius, the periodicity of the diffraction structure can be constant in the radial direction. Different diffraction orders can be used to provide the first diffractive power and the second diffractive power, where the second diffractive power is different from the first diffractive power. The diffraction efficiency of the transition region can be bifocal, so as to diffract light partially into the first-order diffraction order to generate the first diffractive power, and partially into the second-order diffraction order to generate the second diffractive power. This can be achieved by providing the diffraction structure in the first transition region and / or the second transition region with a radial periodicity corresponding to the radial periodicity of the diffraction structure providing the first diffractive power or the second diffractive power, while adapting the modulation depth of the diffraction structure. The modulation depth can correspond to the depth of the diffraction structure relative to the base curve of the spectacle lens, which can correspond to the depth of the corresponding engraving in the spectacle lens. In other words, the modulation depth can correspond to the extension of the diffraction structure parallel to the optical axis of the spectacle lens and / or parallel to the optical axis of the wearer's eye when the wearer wears the spectacle lens. Depending on the modulation depth, the ratio of the light diffracted into different diffraction orders provided by the diffraction structure can be adjusted. The modulation depth of the diffraction structure in the transition region can vary gradually in the radial direction. At the junction between the first transition region or the second transition region and the peripheral region, the diffraction structure of the first transition region or the second transition region can respectively have a modulation depth corresponding to the modulation depth of the diffraction structure in the peripheral region. Similarly, at the junction between the central region and the first transition region, the diffraction structure of the first transition region can correspond to the modulation depth of the diffraction structure in the central region. In the case where no diffraction structure is provided in the central region, the modulation depth of the diffraction structure in the first transition region can be adjusted to zero at the junction between the first transition region and the central region.

[0067] In Table 1 below, some alternative examples of modulation depths leading to different diffraction efficiencies are discussed, and the present disclosure is not limited to these examples. These diffraction orders (DO) of the corresponding diffraction efficiencies can be used in the central region, the peripheral region, and / or the edge region to provide the corresponding first diffraction power and second diffraction power. The modulation depth is indicated with reference to the design wavelength λ used for designing the ophthalmic lens design data, which may correspond to a wavelength of λ = 546.07 nm (as specified in EN ISO 7944:1998 as the reference wavelength corresponding to the green mercury e-line). However, according to other embodiments, different wavelengths, such as 587.6 nm, may be used. The selected design wavelength may optionally depend on different regulations and practices applicable to the ophthalmic lens design data.

[0068] Table 1

[0069] Modulation depth of the diffraction structure The generated main diffraction order 0λ No diffraction, so only the 0th order DO 0.5λ The 0th order DO is about 50% and the 1st order DO is about 50% 1λ 1st order DO 1.5λ The 1st order DO is about 50% and the 2nd order DO is about 50% 2λ 2nd order DO

[0070] As can be seen, adjusting the modulation depth allows tuning of the diffraction orders that mainly contribute to the diffraction efficiency. By providing a gradually increasing or decreasing modulation depth for the diffraction structure in the transition region, an intermediate modulation depth can be achieved, which may correspond to the average of the gradually varying modulation depths. Negative diffraction orders and thus negative diffraction addition powers can be achieved by inverting the diffraction profile with respect to the baseline of the corresponding surface of the ophthalmic lens to which the diffraction structure is applied. The modulation profile of the diffraction structure providing a specific negative diffraction addition power may substantially correspond to the mirror image of the modulation profile of the diffraction structure providing the corresponding positive additional diffraction power.

[0071] According to an optional embodiment, the central region may not have an additional diffractive power and thus may not have a diffractive structure, which may be considered as a diffractive structure with a modulation depth of 0λ. The peripheral region may have a diffractive power achieved by diffracting light mainly into the first diffractive order through a diffractive structure and thus may have a modulation depth of approximately 1λ. In the edge region, a diffractive structure may similarly not be provided and thus a modulation depth of 0λ may be provided. Accordingly, the first peripheral region may be adjusted to have a modulation depth gradually increasing from 0λ to 1λ in the radial direction from the junction with the central region to the junction with the peripheral region, wherein the periodicity of the diffractive structure in the first transition region may correspond to the periodicity of the peripheral region. Similarly, the second peripheral region may be adjusted to have a modulation depth gradually decreasing from 1λ to 0λ in the radial direction from the junction with the peripheral region to the junction with the edge region, wherein the periodicity of the diffractive structure in the first transition region may correspond to the periodicity of the peripheral region. This may enable the first peripheral region and the second peripheral region to have non-zero diffractive efficiencies in the 0th order DO and the 1st order DO and thus, respectively, have a bifocal characteristic of transferring the first diffractive power to the second diffractive power (and vice versa). An advantage that can be provided by using low diffractive orders (such as the 1st order OD and the 0th order DO) is that possible optical aberrations (such as longitudinal chromatic aberration (LCA)) may not be as pronounced as when using higher diffractive orders. Therefore, using low diffractive orders can enhance the optical quality of the spectacle lens.

[0072] The spectacle lens may further include an edge region disposed radially outside the peripheral region and a second transition region disposed between the peripheral region and the edge region. The edge region may have a zero additional diffractive power, and the second transition region may be adapted to adjust the diffractive efficiency from a second additional diffractive power to a zero additional diffractive power in the radially outward direction. In particular, the edge region may be adapted to not have a diffractive structure. This may reduce manufacturing costs as there is no need to apply a diffractive structure in the edge region of the spectacle lens. Additionally, the diffraction pattern of the diffractive structure typically needs to be smaller as the radius of the spectacle lens increases. Therefore, this feature may allow for the absence of a fine diffractive structure at the spectacle lens, which may thus significantly facilitate the manufacturing process of the spectacle lens. Accordingly, the second transition region may provide a smooth transition between the peripheral region having an additional diffractive power provided by a diffractive structure and the edge region not having a diffractive structure and thus having an effective additional diffractive power of zero. The second transition region may be adapted to transfer the diffractive efficiency from one or more positive diffractive orders and / or negative diffractive orders in the peripheral region to the 0th order diffractive order in the radially outward direction. Therefore, the spectacle lens design including the first transition region and the second transition region adjacent to the peripheral region may have a double-tapered sine-type diffractive profile extending over the first transition region, the peripheral region, and the second peripheral region.

[0073] According to the option, the uniform refractive power can be adjusted to provide a focal point in front of the wearer's retina (i.e., in front of the retina of the wearer's eye), wherein the central region can have a negative diffractive addition power such that the combination of the uniform refractive power and the negative diffractive addition power in the central region is adjusted to achieve emmetropia of the wearer. In other words, in the central region, the combination of the uniform refractive power and the diffractive addition power can achieve emmetropia of the wearer. In particular, in this case, the peripheral region can have a diffractive addition power of zero. The advantage provided by this combination is that the diffractive structure for providing the diffractive addition power can be limited to the central region and the first peripheral region. Accordingly, it may not be necessary to provide a diffractive structure in the radially outer region of the spectacle lens (such as in the peripheral region and / or the edge region). In particular, it may not be necessary to provide a fine diffractive structure in the radially outer region of the spectacle lens.

[0074] The first transition region, the peripheral region, and (if present) the edge region and the second transition region can correspond to different viewing angles of a wearer wearing a spectacle lens manufactured according to the spectacle lens design described in any one of the preceding claims. In particular, the different regions can be arranged concentrically at the spectacle lens. The center point (around which the different regions extend concentrically) can coincide with the viewing point of the spectacle lens.

[0075] The diffractive structure can be applied to one or more surfaces of the spectacle lens, such as the front surface and / or the rear surface. Alternatively or additionally, the diffractive structure can be applied within the spectacle lens, i.e., within the bulk material of the spectacle lens. The diffractive structure can be provided by engraving and / or by local variation of the refractive index of the spectacle lens material. Optionally, the diffractive structure can be embedded in at least a birefringent structure and / or a layer structure, which can help to provide a smooth and cleanable surface. Alternatively or additionally, the diffractive structure can be applied by ion beam etching and / or electron etching and / or molding and / or thermoforming and / or lathe cutting.

[0076] The diffractive structure can be provided with a sinusoidal profile and can have a constant periodicity when observed with a quadratic radius. Alternatively, the diffractive structure can deviate from the sinusoidal profile diffractive structure by having one or more different blaze angles and / or one or more different oscillating profile wavefront inclinations. The diffractive structure can extend concentrically around the optical axis of the spectacle lens or. Optionally, at least some of the diffractive structures in the diffractive structure can extend eccentrically with respect to the optical axis of the spectacle lens.

[0077] Optionally, the diffraction efficiency of the diffraction structure may vary with the azimuthal position at the spectacle lens, i.e., the additional diffractive power provided by the diffraction structure may not result in rotationally symmetric defocus and / or blur. Optionally, rotationally symmetric or asymmetric defocus and / or blur may be provided to mitigate and / or treat myopia. Optionally, the diffraction efficiency may be adjusted and / or customized for the wearer's eye biometrics with respect to its azimuthal configuration and / or radial configuration. Thus, the azimuthal configuration and / or radial configuration and / or diffraction efficiency of the diffraction structure may depend on at least one of the following parameters: axial length, retinal curvature, corneal curvature measurement power, or Rx.

[0078] Optionally, different regions of the spectacle lens may correspond to the following viewing angle ranges, where the viewing angle is specified as the half-angle between the envelope surface of the viewing angle cone and the optical axis of the spectacle lens. The different regions may optionally overlap each other. Table 2 exemplarily indicates the angular ranges of different regions of the spectacle lens according to two different optional embodiments:

[0079] Table 2

[0080]

[0081] Additionally or alternatively, a data processing device may be provided, the data processing device including a processor configured to at least partially execute the above method.

[0082] In other words, a data processing system may be provided, the data processing system including a processor and a storage medium coupled to the processor, wherein the processor is adapted to at least partially execute the above method based on a computer program stored on the storage medium.

[0083] The data processing device or system may be a digital electronic machine that may be programmed to automatically execute a sequence of arithmetic or logical operations (computations). These logical operations may be at least partially defined by the above method.

[0084] The data processing device may be a computer. The term "computer" may refer to general-purpose devices such as personal computers (PCs) as well as mobile devices such as smartphones and tablet computers. However, the term "computer" is not limited to a single device. Instead, the term "computer" should be interpreted in a broad sense to include all data processing devices configured or adapted to at least partially execute the above method, either alone or in combination with other (data processing) devices. Thus, the term "computer" may also refer to a group of computers linked together and acting together, such as a computer network or a computer cluster.

[0085] The data processing device may include at least one processor or processing element, such as a central processing unit (CPU) (optionally in the form of a microprocessor). The data processing device may include computer memory, optionally semiconductor memory chips. The processor may be configured to execute a computer program. The computer program may be stored on the computer memory. The data processing device may include a connection that may be configured to connect to one or more peripheral devices (such as including at least one of the following: input devices (such as keyboards, mice, joysticks, etc.), output devices (display screens, printers, etc.) and input / output devices that perform both functions (such as touchscreens)). The peripheral devices may allow retrieval of information from external sources (such as the operator of the computer) and support the saving and retrieval of operation results.

[0086] The description of the method given above is applicable to the data processing device with necessary modifications, and vice versa.

[0087] Additionally or alternatively, a computer program may be provided, which includes instructions that, when executed by a computer, cause the computer to at least partially execute the above method.

[0088] The computer program may in particular be defined as a sequence of instructions or a set of instructions provided in a programming language for execution by a computer. The computer program may be considered a software component.

[0089] The computer program may in particular be provided as an executable file and may be provided in source code form (i.e., its human-readable form). The source code may require additional computer programs executable by the computer, since computers generally can only execute their native instructions. Thus, the additional computer program may also be provided or the additional computer program may be part of the computer program. However, the computer program may also be provided without such additional computer programs.

[0090] The description of the method and the data processing device given above is applicable to the computer program with necessary modifications, and vice versa.

[0091] Additionally or alternatively, a computer-readable storage medium may be provided, on which at least part of the above computer program is stored.

[0092] That is to say, the computer-readable storage medium may include instructions that, when executed by a computer, cause the computer to at least partially execute the above method.

[0093] The computer-readable storage medium may be any digital data storage device, such as a USB flash drive, a hard disk drive, a CD-ROM, an SD card or an SSD card.

[0094] The description given above of the method, data processing apparatus, and computer program applies, mutatis mutandis, to a computer-readable storage medium, and vice versa.

[0095] Additionally or alternatively, a data signal may be provided, on which the above computer program is at least partially carried.

[0096] That is to say, the computer program does not necessarily need to be stored on a computer-readable storage medium in order to be available for use by a computer, but may also be obtained from the outside via a data signal, for example using the Internet or other means.

[0097] Those skilled in the art should understand that the above features, as well as the features in the following description and the drawings, are disclosed not only in the explicitly disclosed embodiments and combinations, but also in other technically feasible combinations and isolated features are encompassed by this disclosure. In the following, several alternative embodiments and specific examples are described with reference to the drawings used to illustrate this disclosure without limiting this disclosure to the described embodiments.

[0098] Additional alternative embodiments will be described below with reference to the drawings. In the drawings:

[0099] Figure 1 A schematic diagram of a spectacle lens design according to a first alternative embodiment is shown;

[0100] Figure 2A Another alternative embodiment of the spectacle lens design is shown;

[0101] Figure 2B A graph showing the variation of the difference sagittal height of the diffraction structure applied to the spectacle lens with the radial position on the spectacle lens is shown;

[0102] Figure 2C Shows Figure 2A the variation of the modulus of the optical transfer function of the spectacle lens design with spatial frequency;

[0103] Figure 2D The modulus of the optical transfer function is shown;

[0104] Figure 3 A spectacle lens design according to another alternative embodiment is shown;

[0105] Figure 4A Another alternative embodiment of the spectacle lens design is shown;

[0106] Figure 4B A graph showing the variation of the difference sagittal height of the diffraction structure applied to the spectacle lens with the radial position on the spectacle lens is shown;

[0107] Figure 4Cshows Figure 4A the variation of the modulus of the optical transfer function of the spectacle lens design with spatial frequency;

[0108] Figure 4D shows the modulus of the optical transfer function;

[0109] Figure 5A shows another alternative embodiment of the spectacle lens design according to the present disclosure;

[0110] Figure 5B shows a graph of the variation of the difference sagittal height of the diffraction structure applied to the spectacle lens with the radial position on the spectacle lens;

[0111] Figure 5C shows the modulus of the optical transfer function;

[0112] Figure 5D shows the modulus of the optical transfer function;

[0113] Figure 6 shows a method for manufacturing a spectacle lens.

[0114] In the drawings, the same reference numerals are used for corresponding or similar features in different figures.

[0115] Figure 1 Schematically shows a spectacle lens 10 according to a first alternative embodiment, wherein the spectacle lens 10 is provided by spectacle lens design data according to an alternative embodiment of the present disclosure. The spectacle lens 10 is shown in combination with a schematically shown eye 16 of a wearer wearing the spectacle lens 10. The schematically shown light rays 100 and 200 indicate beam paths at different viewing angles.

[0116] The spectacle lens design data is provided for the purpose of using the spectacle lens design data to manufacture a spectacle lens 10 related to the wearer. The spectacle lens design data is adjusted such that the spectacle lens 10 has a refractive power and at least a partial diffractive additional power. In addition, the spectacle lens 10 is adjusted to provide a central region 12 that has a first diffractive additional power (which may be zero) and is adjusted to achieve emmetropia of the wearer by providing a focal point 102 at the retina 18 of the wearer. Further, the spectacle lens 10 provides a peripheral region 14 disposed radially outside the central region 12, wherein the peripheral region 14 has a second diffractive additional power and is adjusted to provide a focal point 202 in front of and / or behind the retina 18 of the wearer's eye 16.

[0117] In addition, the spectacle lens 10 further includes a first transition region 20 disposed between the central region 12 and the peripheral region 14, wherein the first transition region 20 is adapted to adjust the diffraction efficiency from a first diffractive addition power to a second diffractive addition power in a radially outward direction.

[0118] The spectacle lens 10 has a uniform refractive power that extends at least over the central region 12, the peripheral region 14, and the first transition region 20. The refractive power can be determined by the shape of the rear surface 10a of the spectacle lens 10 and the refractive index of the spectacle lens material. According to the presented alternative embodiment, the uniform refractive power is adjusted to achieve emmetropia for the wearer. The diffractive addition power of the central region 12 is zero. This can be achieved by not providing any diffractive structures in the central region, or by providing a diffractive structure whose diffractive efficiency has a non-zero diffractive addition power only in the zero-order diffractive order. Accordingly, the light rays 100 that propagate through the central region 12 and reach the eye 16 at a viewing angle of 0° (i.e., parallel to the optical axis 1000 of the spectacle lens) are focused at the focal point 102 on the retina 18.

[0119] The peripheral region 14 has a positive diffractive addition power provided by a diffractive structure having a non-zero diffractive efficiency in one or more positive diffractive orders. Thus, the overall optical power or effective optical power of the spectacle lens 10 in the peripheral region 14 results from the combination of the refractive power and the diffractive addition power generated by the diffractive structure provided in the peripheral region 14. Since the optical power in the peripheral region 14 is higher, the focal points of the light rays transmitted through the peripheral region 14 (viewed by the wearer at a non-zero viewing angle) are focused at a shorter focal length, such that the focal point 202 is in front of the retina 18 within the eye 16. Thus, the wearer will view these light rays 200 in a defocused manner. This can be beneficial for slowing down the progression of myopia and / or treating the myopia of the wearer, while still having emmetropia for light rays 100 that are parallel to the optical axis 1000 and have a small viewing angle.

[0120] Figure 2A Depicts another alternative embodiment of the spectacle lens design that is Figure 1 similar to the spectacle lens design shown. Although many characteristics of this alternative embodiment correspond to Figure 1 the characteristics of the embodiment shown, it differs from Figure 1The embodiments differ in that their peripheral region 14 does not extend to the edge 10b of the spectacle lens 10, but is limited to a predetermined radial portion of the spectacle lens 10. Additionally, the spectacle lens 10 further includes an edge region 24 disposed radially outside of the peripheral region 14 and a second transition region 22 disposed between the peripheral region 14 and the edge region 24. The edge region 24 has a diffraction addition power of zero, and the second transition region 22 is adapted to adjust the diffraction efficiency from a second diffraction addition power to a diffraction addition power of zero in a radially outward direction. The diffraction addition power of the peripheral region 14 can be the same as or similar to Figure 1 the diffraction addition power of the peripheral region 14 of the embodiment of. Accordingly, light rays 200 transmitted through the peripheral region 14 at a certain viewing angle and entering the wearer's eye 16 are focused at a focal point 202 in front of the retina 18, while the central region 12 is adjusted again to achieve emmetropia of the wearer to achieve a focal point 102 at the retina 102. However, according to Figure 2A the embodiments presented in, compared with Figure 1 the embodiment of, the angular range of the viewing angle covered by the peripheral region 14 is reduced.

[0121] By providing the second transition region 22, a smooth transition from the diffraction addition power of the peripheral region 14 to the zero diffraction addition power of the edge region 24 can be achieved. Thus, there is no need to provide a diffraction structure in the edge region 24. This facilitates the manufacture of the spectacle lens because typically, diffraction structures in the radially outer region (such as the edge region 24) would require fine diffraction structures, which would require a high manufacturing input. Therefore, limiting the peripheral region 14 to a predetermined angular range (such as an angular range of 10°) and providing the second transition region 22 and the edge region 24 in the radially outward direction can allow for a reduction in manufacturing input and thus a reduction in manufacturing cost.

[0122] Figure 2BA graph schematically showing the variation of the difference sagittal height (in μm on the vertical axis) of the diffraction structure applied to the spectacle lens 10 with the radial position (horizontal axis in mm) on the spectacle lens 10 is presented. The difference sagittal height can correspond to the modulation depth of the diffraction structure. The difference sagittal height corresponds to the height profile of the diffraction structure relative to the base curve of the spectacle lens 10, which can correspond to the conventional front surface or the conventional back surface 10a of the spectacle lens 10 without the applied diffraction structure. The brackets below the graph indicate the central region 12, the first transition region 20, the peripheral region 14, the second transition region 22, and the edge region 24. As can be seen, no diffraction structure is applied to the spectacle lens 10 in the central region 12 and the edge region 24. The peripheral region 14 has a diffraction structure that has a uniform depth relative to the base curve, which corresponds to the zero line of the graph. The transition regions respectively provide an increasing depth and a decreasing depth of the diffraction structure, which provides a smooth transition from zero diffraction addition power in the central region 12 and the edge region 24 respectively to the peripheral region 14 with non-zero diffraction addition power. Due to the increasing and decreasing height profiles of the diffraction structure in the transition regions 20 and 22, the varying diffraction efficiency can vary with the radial position. When observed as a function of the square of the radial position, the period length of the diffraction structure can be constant. The diffraction structure of the spectacle lens design data can be provided by calculations, which can, for example, use the ZEMAX model and UDS to import and analyze the precise parametric prescription of the diffraction profile.

[0123] Figure 2C Exemplarily shown is, compared to the diffraction limit 2000, Figure 2A the variation of the modulus (in normalized units) of the optical transfer function (OTF) of a spectacle lens design with the spatial frequency (in cycles / mm). The OTF of the light propagating through the central region 14 without the diffraction structure at a viewing angle of 0° is very similar to the OTF 2000 indicating the diffraction limit. This indicates that for light viewed at a 0° viewing angle, the optical quality is good and the imaging on the retina 18 is good. Graph 2004 and graph 2006 respectively indicate the OTF of the light propagating through the first transition region 20 viewed at a 5° viewing angle (graph 2004) and the OTF of the light propagating through the peripheral region 14 viewed at a 10° viewing angle (graph 2006). These viewing angles correspond to the light propagating through the regions where the diffraction structure is applied to the spectacle lens 10 to provide positive defocus. Accordingly, the OTFs at these viewing angles are significantly lower than the OTF 2000 indicating the diffraction limit. Therefore, the light viewed at a 10° viewing angle appears in a strongly defocused manner, and the light viewed at a 5° viewing angle appears in a moderately defocused manner.

[0124] Figure 2D Shows Figure 2AVariation of the modulus (vertical axis, in normalized units) of the optical transfer function (OTF) of the spectacle lens depicted with respect to the focus shift (in mm): The upper figure is for light transmitted through the central region 12 viewed at a 0° viewing angle, the middle figure is for light transmitted through the first transition region 20 viewed at a 5° viewing angle, and the lower figure is for light transmitted through the peripheral region 14 viewed at a 10° viewing angle. As can be seen, the OTF of the light at 0° has substantially a single peak in the zero-order diffraction order (0 th DO), while there is substantially no diffraction efficiency in the positive first-order diffraction order and the negative first-order diffraction order (+1 st DO, -1 st DO). This makes the optical power of the central region substantially correspond to its refractive optical power without any additional diffraction additional optical power. In contrast, at a 5° viewing angle associated with the first transition region 20, the diffraction efficiency is split such that the OTF has peaks at 0 th DO and at +1 st DO to transfer the diffraction efficiency from 0 th DO to 1 st DO, where 0 th DO is more prominent than +1 st DO. At a 10° viewing angle associated with the peripheral region 14, the OTF provides the most prominent peak at +1 st DO, while the peak at 0 th DO is less prominent. This enables a reliable superposition of the diffraction additional optical power and the refractive optical power, thereby achieving the intended focusing of light before the retina 18. Thus, the first transition region 20 can be based on a bifocal diffraction efficiency that has non-zero diffraction efficiency in a first diffraction additional optical power and non-zero diffraction efficiency in a second diffraction additional optical power.

[0125] Figure 3 Exemplarily shows a spectacle lens design according to an alternative embodiment similar to the spectacle lens design presented and described with reference to Figure 1 However, Figure 3 the spectacle lens design shown in Figure 1The embodiments differ in that the peripheral region is adjusted to provide positive diffractive additional power and negative diffractive additional power to provide positive defocus and negative defocus relative to the retina 18. The peripheral region 14 according to this embodiment has positive diffractive additional power and negative diffractive additional power provided by one or more positive diffractive orders and one or more negative diffractive orders. The first transition region 20 may be based on a bifocal diffractive efficiency that has non-zero diffractive efficiency in the first diffractive additional power and non-zero diffractive efficiency in the second diffractive additional power. Such a configuration may produce a blurred image of light transmitted through the peripheral region 14 and viewed at an angular view of about 10°. According to this embodiment, the peripheral region 14 extends to the edge 10b of the spectacle lens 10.

[0126] Figure 4A presents another alternative embodiment that substantially corresponds to a combination of alternative embodiments of Figure 2A and Figure 3 Accordingly, the peripheral region 14 is adapted to provide positive diffractive power and negative diffractive power, and instead of extending to the edge 10b of the spectacle lens 10, it is restricted to a predetermined radial range and is adjacent to a second transition region 22 surrounding the peripheral region 14 in the radially outer direction. This embodiment may provide a blurred image of light viewed at an angle of about 10°, and may reduce manufacturing effort by avoiding the setting of diffractive structures in the peripheral region 24 located radially outside the second transition region. Optionally, the angular view range corresponding to different regions of the spectacle lens may be selected according to one of the embodiments presented in Table 2 above.

[0127] The second transition region may be based on a bifocal diffractive efficiency that has non-zero diffractive efficiency in the second diffractive additional power and non-zero diffractive efficiency in the zero-order diffractive order. The peripheral region may have zero diffractive additional power and may not be provided with any diffractive structures.

[0128] Figure 4B is schematically shown for according to Figure 4AGraph showing the variation of the difference sagittal height (in μm, on the vertical axis) of the diffractive structure applied to the spectacle lens design presented in the embodiments as a function of the radial position (horizontal axis, in mm) on the spectacle lens. The difference sagittal height corresponds to the height profile and thus to the modulation depth of the diffractive structure relative to the base curve of the spectacle lens 10, which may correspond to the conventional front surface or the conventional rear surface 10a of the spectacle lens 10 without the diffractive structure applied. The brackets below the graph indicate the central region 12, the first transition region 20, the peripheral region 14, the second transition region 22, and the edge region 24. As can be seen, no diffractive structure is applied to the spectacle lens 10 in the central region 12 and the edge region 24. The period length can be constant when observed as a function of the square of the radial position. The diffractive structure in the transition regions 20, 22 can have a different blaze angle from the diffractive structure in the peripheral region 24. The boundary line (marked with a dashed line) between the peripheral region 14 and the second transition region 22 is located at a radius of 6 mm from the center of the spectacle lens 10. The presented diffractive profile can provide an additional diffractive addition power of +2D through the positive diffractive order.

[0129] Figure 4C Exemplarily shown is, compared to the diffraction limit 4000, Figure 4A the variation of the modulus (in normalized units) of the optical transfer function (OTF) of the spectacle lens design as a function of the spatial frequency (in cycles / mm). The OTF of the light rays propagating through the central region 14 without the diffractive structure at a viewing angle of 0° (as shown in graph 4002) is very similar to the OTF 4000 indicating the diffraction limit. This shows that for light rays viewed at a 0° viewing angle, the optical quality is good and the imaging on the retina 18 is good. Graphs 4004 and 2006 respectively indicate the OTF of the light rays propagating through the first transition region 20 viewed at a 5° viewing angle (graph 4004) and the OTF of the light rays propagating through the peripheral region 14 viewed at viewing angles from 10° to 20° (graph 4006). These viewing angles correspond to the light rays propagating through the regions where the diffractive structure is applied to the spectacle lens 10 to provide positive defocus. Accordingly, the OTFs of these viewing angles are significantly lower than the OTF 4000 indicating the diffraction limit. Thus, the light rays viewed at viewing angles from 5° to approximately 20° (see line 4008) appear in a strongly positive defocus and strongly negative defocus manner, and the light rays viewed at a 5° viewing angle appear in a blurred manner.

[0130] Figure 4D Shows Figure 4AVariation of the modulus of the optical transfer function (OTF) of the spectacle lens depicted (vertical axis, in normalized units) with focus shift (in mm): Graph 4102 is for light transmitted through the central region 12 viewed at a 0° angle of view, Graph 4104 is for light transmitted through the first transition region 20 viewed at a 5° angle of view, and the graph indicated by arrow 4106 is for light transmitted through the peripheral region 14 and the second transition region 22 viewed at an angle of view of 10° and greater. As can be seen, the OTF of the light at 0° has substantially a single peak in the zero-order diffraction order (0 th DO), while there is substantially no diffraction efficiency in the positive first-order diffraction order and the negative first-order diffraction order (+1 st DO, -1 st DO). This makes the optical power of the central region substantially correspond to its refractive optical power without any additional diffraction power. In contrast, at a 5° angle of view associated with the first transition region 20, the diffraction efficiency is split such that the OTF has peaks at 0 th DO and at +1 st DO and -1 st DO to transfer the diffraction efficiency from 0 th DO to +1 st DO and -1 st DO, where 0 th DO is more prominent than +1 st DO and -1 st DO. For larger angles of view, the OTF provides non-zero diffraction efficiency in the positive and negative diffraction orders to provide an associated focus shift, thereby creating an intended blur for these angles of view.

[0131] Figure 5A Depicts another alternative embodiment of a spectacle lens design in accordance with the present disclosure. According to this embodiment, a uniform refractive optical power provides a focus in front of the wearer's retina 18 (i.e., within the eye 16 and in front of the retina 18). The central region 12 has a negative diffraction power such that the combination of the uniform refractive optical power and the negative diffraction power in the central region 12 is adjusted to achieve emmetropia for the wearer of the eye 16. The peripheral region 14 does not have any diffraction power and is thus adapted to provide defocus that focuses the light 200 transmitted through the peripheral region 14 at a specific angle of view and reaching the eye 16 in front of the retina 18 due to the refractive optical power of the spectacle lens. Accordingly, the diffraction power of the peripheral region 14 is zero. The first transition region 20 disposed between the central region 12 and the peripheral region 14 is adapted to adjust the diffraction efficiency from the first diffraction power of the central region 12 to zero diffraction power of the peripheral region 14 in a radially outward direction.

[0132] Figure 5B Schematically shows the variation of the difference sagittal height (in μm on the vertical axis) applied to the diffractive structure of an ophthalmic lens design according to the embodiment presented in Figure 5A with respect to the radial position (horizontal axis, in mm) on the ophthalmic lens 10. The difference sagittal height corresponds to the height profile and thus to the modulation depth of the diffractive structure relative to the base curve of the ophthalmic lens 10, which may correspond to the conventional front surface or the conventional back surface 10a of the ophthalmic lens 10 without the diffractive structure applied. The brackets below the graph indicate the central region 12, the first transition region 20, and the peripheral region 14. As can be seen, no diffractive structure is applied to the ophthalmic lens 10 in the peripheral region 14. The first transition region 20 is adapted to gradually weaken the diffractive additional power in the radially outward direction.

[0133] Figure 5C Exemplarily shows the variation of the modulus (in normalized units) of the optical transfer function (OTF) of an ophthalmic lens design compared to the diffraction limit 5000 Figure 5A with respect to the spatial frequency (in cycles / mm). The OTF of the light propagating through the central region 14 without the diffractive structure at a viewing angle of 0° (shown in graph 5002) is close to the OTF 5000 indicating the diffraction limit. However, compared to the above embodiment without the diffractive structure applied to the central region 12, the deviation from the diffraction limit 5000 can be more obvious. Graph 5004 and graph 5006 respectively indicate the OTF of the light propagating through the first transition region 20 viewed at a 10° angle (graph 5004) and the OTF of the light propagating through the peripheral region 14 viewed at a 20° angle (graph 5006). Accordingly, the OTFs at these viewing angles are significantly lower than the OTF 5000 indicating the diffraction limit. Therefore, the light viewed at a 20° angle appears in a strongly defocused manner, and the light viewed at a 10° angle appears in a moderately defocused manner.

[0134] Figure 5D Shows Figure 5A the variation of the modulus (vertical axis, in normalized units) of the optical transfer function (OTF) of the ophthalmic lens depicted in st with respect to the focus shift (in mm): the upper graph is for the light transmitted through the central region 12 viewed at a 0° angle, the middle graph is for the light transmitted through the first transition region 20 viewed at a 10° angle, and the lower graph is for the light transmitted through the peripheral region 14 viewed at a 20° angle. As can be seen, the OTF of the light at 0° basically has a single peak in the -1 st diffraction order (-1 st DO), while in the positive first diffraction order and the negative first diffraction order (-2 nd DO, 0 thDO), there is substantially no diffraction efficiency. This causes the optical power in the central region to substantially correspond to its refractive optical power combined with the diffraction additional optical power provided on the central region 12. In contrast, at a 10° viewing angle associated with the first transition region 20, the diffraction efficiency is split such that the OTF has substantially equal peaks at 0 th DO and at -1 st DO to transfer the diffraction efficiency from -1 st DO to 0 th DO. According to this alternative embodiment, at a 20° viewing angle associated with the peripheral region 14, the OTF provides a peak only at 0 th DO. This enables a reliable superposition of the diffraction additional optical power and the refractive optical power in the central region 12 to achieve emmetropia, while achieving the expected focusing of light in front of the retina 18 for a larger viewing angle through the peripheral region. The first transition region 20 may be based on a bifocal diffraction efficiency that has a non-zero diffraction efficiency in a first diffraction additional optical power (-1 st DO) and a non-zero diffraction efficiency in a second diffraction additional optical power (0 th DO). The transfer from -1 st DO to 0 th DO causes a focus shift, thereby compensating for the additional refractive optical power in the central region and avoiding said compensation for the additional refractive optical power in the peripheral region 14.

[0135] In the embodiments presented above, the first transition region, the peripheral region, and (if present) the edge region and the second transition region correspond to different viewing angles of a wearer wearing the spectacle lens 10 manufactured according to the spectacle lens design as described in any one of the preceding claims. The associated viewing angle ranges for each region may vary between the respective embodiments.

[0136] Figure 6 A method 600 for manufacturing a spectacle lens 10 is schematically shown. The method 600 includes a step 602 of providing spectacle lens design data according to an embodiment of the present disclosure and a step 604 of manufacturing the spectacle lens 10 according to the provided spectacle lens design data.

[0137] The present disclosure also includes the following optional clauses but is not limited to these clauses:

[0138] Clause 1. A spectacle lens 10 related to a wearer, the spectacle lens having a refractive optical power and at least partially a diffraction additional optical power, and being provided with:

[0139] - a central region 12, the central region having a first diffraction additional optical power and being adjusted to achieve emmetropia of the wearer; and

[0140] - A peripheral region 14, which is arranged radially outside the central region 12, wherein the peripheral region 14 has a second diffractive additional dioptric power and is adjusted to provide a focal point 202 in at least one of in front of the wearer's retina 18 or behind the wearer's retina 18;

[0141] wherein the spectacle lens design data is adjusted such that the spectacle lens 10 further has:

[0142] - A first transition region 20, which is arranged between the central region 12 and the peripheral region 14, wherein the first transition region 20 is adapted to adjust the diffractive efficiency from the first diffractive additional dioptric power to the second diffractive additional dioptric power in a radially outward direction.

[0143] Clause 2. The spectacle lens design data according to Clause 1, wherein the spectacle lens 10 has a uniform refractive dioptric power extending at least over the central region 12, the peripheral region 14 and the first transition region 20.

[0144] Clause 3. The spectacle lens design data according to Clause 2, wherein the uniform refractive dioptric power is adjusted to achieve emmetropia of the wearer, and wherein the central region 12 has a diffractive additional dioptric power of zero.

[0145] Clause 4. The spectacle lens design data according to any one of the preceding clauses, wherein the peripheral region 14 has a positive diffractive additional dioptric power provided by one or more positive diffractive orders.

[0146] Clause 5. The spectacle lens design data according to any one of Clause 1 or 3, wherein the peripheral region 14 has a positive diffractive additional dioptric power and a negative diffractive additional dioptric power provided by one or more positive diffractive orders and one or more negative diffractive orders.

[0147] Clause 6. The spectacle lens design data according to any one of the preceding clauses, wherein the first transition region 20 is based on a bifocal diffractive efficiency, which has a non-zero diffractive efficiency in the first diffractive additional dioptric power and a non-zero diffractive efficiency in the second diffractive additional dioptric power.

[0148] Clause 7. The spectacle lens design data according to any one of the preceding clauses, further comprising: a rim region 24 and a second transition region 22, the rim region being arranged radially outside the peripheral region 14, the second transition region being arranged between the peripheral region 14 and the rim region 24, wherein the rim region 24 has a diffractive additional dioptric power of zero, and the second transition region 22 is adapted to adjust the diffractive efficiency from the second diffractive additional dioptric power to a diffractive additional dioptric power of zero in a radially outward direction.

[0149] Clause 8. The spectacle lens design data according to Clause 7, wherein the second transition region 22 is based on a bifocal diffraction efficiency that has a non-zero diffraction efficiency in the diffraction order corresponding to the second diffractive addition power and a non-zero diffraction efficiency in the zero-order diffraction order.

[0150] Clause 9. The spectacle lens design data according to Clause 2, wherein the uniform refractive power is adjusted to provide a focus in front of the wearer's retina, and wherein the central region 12 has a negative diffractive addition power such that the combination of the uniform refractive power and the negative diffractive addition power in the central region is adjusted to achieve emmetropia for the wearer.

[0151] Clause 10. The spectacle lens design data according to Clause 9, wherein the diffractive addition power of the peripheral region 14 is zero.

[0152] Clause 11. The spectacle lens design data according to any one of the preceding clauses, wherein the first transition region 20, the peripheral region 14, and, in the case of being subordinate to Clause 7 or Clause 8, the edge region 24 and the second transition region 22 correspond to different viewing perspectives of a wearer wearing a spectacle lens manufactured according to the spectacle lens design according to any one of the preceding clauses.

[0153] Clause 12. A data set in the form of a computer-readable data signal, the data set including at least one of the following types of data:

[0154] i a virtual representation of a spectacle lens 10 configured to be used for manufacturing a spectacle lens 10 according to any one of the preceding clauses;

[0155] ii data including computer-readable instructions for controlling one or more manufacturing machines to manufacture a spectacle lens 10 according to any one of the preceding clauses.

[0156] Clause 13. A computer-readable storage medium having stored thereon the data set according to Clause 12.

[0157] Clause 14. A method 600 configured to generate spectacle lens design data for a spectacle lens 10 by a computer device, the spectacle lens design data being adjusted such that the spectacle lens 10 has a refractive power and at least a partial diffractive addition power and is provided with:

[0158] + a central region 12 having a first diffractive addition power and adjusted to achieve emmetropia for the wearer; and

[0159] + a peripheral region 14, which is arranged radially outside the central region 12, wherein the peripheral region 14 has a second diffractive additional dioptric power and is adjusted to provide a focal point 202 in at least one of in front of the wearer's retina 18 or behind the wearer's retina 18;

[0160] wherein the spectacle lens design data is adjusted such that the spectacle lens 10 further has:

[0161] + a first transition region 20, which is arranged between the central region 12 and the peripheral region 14, wherein the first transition region 20 is adapted to adjust the diffractive efficiency from the first diffractive additional dioptric power to the second diffractive additional dioptric power in a radially outward direction.

[0162] Clause 15. The method 600 according to Clause 14, the method is further configured to use the spectacle lens design data to manufacture the spectacle lens 10.

[0163] List of reference numerals

[0164] 10 Spectacle lens

[0165] 10a Rear surface of the spectacle lens

[0166] 10b Edge of the spectacle lens

[0167] 12 Central region

[0168] 14 Peripheral region

[0169] 16 Eye

[0170] 18 Retina

[0171] 20 First transition region

[0172] 22 Second transition region

[0173] 24 Edge region

[0174] 100 Light ray propagating through the central region at zero viewing angle

[0175] 102 Focal point of the light ray 100

[0176] 200 Light ray propagating through the peripheral region at a non-zero viewing angle

[0177] 202 Focal point of the light ray 200

[0178] 600 Method for manufacturing a spectacle lens

[0179] 602 - 604 Method steps

[0180] 1000 Optical axis of the spectacle lens

[0181] Graph of optical transfer function from 2000 to 2006

[0182] Graph of optical transfer function from 4000 to 4006

[0183] Variation of the modulus of OTF with focus offset from 4102 to 4106

[0184] Graph of optical transfer function from 5000 to 5006

Claims

1. Ophthalmic lens design data for manufacturing an ophthalmic lens (10) related to a wearer, the ophthalmic lens (10) having a refractive power and at least a partial diffractive additional power, and being provided with: - A central region (12) having a first diffractive additional power and adjusted to achieve emmetropia for the wearer; and - The peripheral region (14), which is arranged radially outside the central region (12), wherein, The peripheral region (14) has a second diffractive additional power and is adjusted to provide a focal point (202) in at least one of in front of the wearer's retina (18) or behind the wearer's retina (18); Wherein, the ophthalmic lens design data is adjusted such that the ophthalmic lens (10) further has: - A first transition region (20) disposed between the central region (12) and the peripheral region (14), Characterized in that, The first transition region (20) is adapted to adjust the diffraction efficiency from the first diffractive additional power to the second diffractive additional power in a radially outward direction, Wherein, the ophthalmic lens (10) has a uniform refractive power extending at least over the central region (12), the peripheral region (14) and the first transition region (20), and Wherein, the uniform refractive power is adjusted to provide a focal point in front of the wearer's retina, and wherein the central region (12) has a negative diffractive additional power such that the combination of the uniform refractive power and the negative diffractive additional power in the central region is adjusted to achieve emmetropia for the wearer.

2. The spectacle lens design data according to claim 1, wherein, The peripheral region (14) has a positive diffractive additional power provided by one or more positive diffraction orders.

3. The spectacle lens design data according to claim 1 or 2, wherein, The peripheral region (14) has a positive diffractive additional power and a negative diffractive additional power provided by one or more positive diffraction orders and one or more negative diffraction orders.

4. The spectacle lens design data according to any one of the preceding claims, wherein, The first transition region (20) is based on a bifocal diffraction efficiency having a non-zero diffraction efficiency in the first diffractive additional power and a non-zero diffraction efficiency in the second diffractive additional power.

5. The spectacle lens design data according to any one of the preceding claims, further comprising: An edge region (24) and a second transition region (22), the edge region being disposed radially outside the peripheral region (14), the second transition region being disposed between the peripheral region (14) and the edge region (24), wherein the edge region (24) has a diffractive additional power of zero, and the second transition region (22) is adapted to adjust the diffraction efficiency from the second diffractive additional power to a diffractive additional power of zero in a radially outward direction.

6. The spectacle lens design data according to claim 5, wherein, The second transition region (22) is based on a bifocal diffraction efficiency having a non-zero diffraction efficiency in the diffraction order corresponding to the second diffractive additional power and a non-zero diffraction efficiency in the zero-order diffraction order.

7. The spectacle lens design data according to any one of the preceding claims, wherein, The first transition region (20), the peripheral region (14) and, in the case of dependent claims 5 or 6, the edge region (24) and the second transition region (22) correspond to different viewing angles of a wearer wearing an ophthalmic lens manufactured according to the ophthalmic lens design of any one of the preceding claims.

8. An ophthalmic lens (10) manufactured using the ophthalmic lens design data of any one of the preceding claims.

9. A data set in the form of a computer-readable data signal, the data set including at least one of the following types of data: (i) A virtual representation of an ophthalmic lens (10) configured to be used in manufacturing the ophthalmic lens (10) according to claim 8; (ii) Data including computer-readable instructions for controlling one or more manufacturing machines to manufacture the ophthalmic lens (10) according to claim 8.

10. A computer-readable storage medium having stored thereon the data set according to claim 9.

11. A method (600) configured to generate, by a computer device, ophthalmic lens design data for an ophthalmic lens (10), the ophthalmic lens design data being adjusted such that the ophthalmic lens (10) has a refractive power and at least a partially diffractive additional power and is provided with: + A central region (12) having a first diffractive additional power and adjusted to achieve emmetropia for the wearer; and + a peripheral region (14) disposed radially outside the central region (12), wherein, The peripheral region (14) having a second diffractive additional power and adjusted to provide a focus (202) in at least one of in front of the wearer's retina (18) or behind the wearer's retina (18); wherein the ophthalmic lens design data is adjusted such that the ophthalmic lens (10) further has: + A first transition region (20) disposed between the central region (12) and the peripheral region (14), characterized in that the first transition region (20) is adapted to adjust the diffraction efficiency from the first diffractive additional power to the second diffractive additional power in a radially outward direction, wherein the ophthalmic lens (10) has a uniform refractive power extending at least over the central region (12), the peripheral region (14), and the first transition region (20), and wherein the uniform refractive power is adjusted to provide a focus in front of the wearer's retina, and wherein the central region (12) has a negative diffractive additional power such that the combination of the uniform refractive power and the negative diffractive additional power in the central region is adjusted to achieve emmetropia for the wearer.

12. The method (600) according to claim 11, further configured to use the ophthalmic lens design data to manufacture an ophthalmic lens (10).

13. Ophthalmic lens design data for manufacturing an ophthalmic lens (10) related to a wearer, the ophthalmic lens (10) having a refractive power and at least a partially diffractive additional power and being provided with: - A central region (12) having a first diffractive additional power and adjusted to achieve emmetropia for the wearer; and - The peripheral region (14), which is arranged radially outside the central region (12), wherein, The peripheral region (14) having a second diffractive additional power and adjusted to provide a focus (202) in at least one of in front of the wearer's retina (18) or behind the wearer's retina (18); wherein the ophthalmic lens design data is adjusted such that the ophthalmic lens (10) further has: - A first transition region (20) disposed between the central region (12) and the peripheral region (14), characterized in that The first transition region (20) is adapted to adjust the diffraction efficiency from the first diffractive addition power to the second diffractive addition power in a radially outward direction. The peripheral region (14) has a positive diffractive addition power and a negative diffractive addition power provided by one or more positive diffraction orders and one or more negative diffraction orders.

14. The spectacle lens design data according to claim 13, wherein The spectacle lens (10) has a uniform refractive power extending at least over the central region (12), the peripheral region (14) and the first transition region (20).

15. The spectacle lens design data according to claim 13 or 14, wherein The first transition region (20) is based on a bifocal diffraction efficiency having a non-zero diffraction efficiency in the first diffractive addition power and a non-zero diffraction efficiency in the second diffractive addition power.

16. The spectacle lens design data according to any one of claims 13 to 15, further comprising: An edge region (24) and a second transition region (22), the edge region being arranged radially outside the peripheral region (14), the second transition region being arranged between the peripheral region (14) and the edge region (24), wherein the edge region (24) has a diffractive addition power of zero and the second transition region (22) is adapted to adjust the diffraction efficiency from the second diffractive addition power to a diffractive addition power of zero in a radially outward direction.

17. The spectacle lens design data according to claim 16, wherein, The second transition region (22) is based on a bifocal diffraction efficiency having a non-zero diffraction efficiency in the diffraction order corresponding to the second diffractive addition power and a non-zero diffraction efficiency in the zero diffraction order.

18. The spectacle lens design data according to claim 14, wherein, The uniform refractive power is adjusted to provide a focus in front of the wearer's retina, and wherein the central region (12) has a negative diffractive addition power such that the combination of the uniform refractive power and the negative diffractive addition power in the central region is adjusted to achieve emmetropia for the wearer.

19. The spectacle lens design data according to any one of claims 13 to 18, wherein, The first transition region (20), the peripheral region (14) and, in the case of dependent claims 16 or 17, the edge region (24) and the second transition region (22) correspond to different viewing angles of a wearer wearing a spectacle lens manufactured according to the spectacle lens design according to any one of claims 13 to 18.

20. A spectacle lens (10) manufactured using spectacle lens design data according to any one of claims 13 to 19.

21. A data set in the form of a computer-readable data signal, the data set comprising at least one of the following types of data: (i) A virtual representation of a spectacle lens (10) configured for manufacturing a spectacle lens (10) according to claim 20; (ii) Data containing computer-readable instructions for controlling one or more manufacturing machines to manufacture a spectacle lens (10) according to claim 20.

22. A computer-readable storage medium having stored thereon the data set according to claim 21.

23. A method (600) configured to generate, by a computer device, spectacle lens design data for a spectacle lens (10), the spectacle lens design data being adjusted such that the spectacle lens (10) has a refractive power and at least a partial diffractive addition power and is provided with: + a central region (12) having a first diffractive addition power and adapted to achieve emmetropia for the wearer; and + a peripheral region (14) disposed radially outside the central region (12), wherein, the peripheral region (14) has a second diffractive addition power and is adjusted to provide a focus (202) in at least one of in front of the wearer's retina (18) or behind the wearer's retina (18); wherein the spectacle lens design data is adjusted such that the spectacle lens (10) further has: + a first transition region (20) disposed between the central region (12) and the peripheral region (14), characterized in that the first transition region (20) is adapted to adjust the diffraction efficiency from the first diffractive addition power to the second diffractive addition power in a radially outward direction, wherein the peripheral region (14) has a positive diffractive addition power and a negative diffractive addition power provided by one or more positive diffraction orders and one or more negative diffraction orders.

24. The method (600) according to claim 23, the method being further configured to manufacture a spectacle lens (10) using the spectacle lens design data.

25. A spectacle lens design data for manufacturing a spectacle lens (10) related to a wearer, the spectacle lens having a refractive power and at least a partial diffractive addition power and being provided with: - a central region (12) having a first diffractive addition power of zero and adapted to achieve emmetropia for the wearer; and - Peripheral region (14), which is arranged radially outside the central region (12), wherein, the peripheral region (14) has a second diffractive addition power and is adjusted to provide a focus (202) in at least one of in front of the wearer's retina (18) or behind the wearer's retina (18); wherein the spectacle lens design data is adjusted such that the spectacle lens (10) further has: - a first transition region (20) disposed between the central region (12) and the peripheral region (14), characterized in that the first transition region (20) is adapted to adjust the diffraction efficiency from the zero first diffractive addition power to the second diffractive addition power in a radially outward direction, wherein the spectacle lens (10) has a uniform refractive power extending at least over the central region (12), the peripheral region (14) and the first transition region (20), and wherein the uniform refractive power is adjusted to achieve emmetropia for the wearer.

26. The spectacle lens design data according to claim 25, wherein, The peripheral region (14) has a positive diffractive addition power provided by one or more positive diffraction orders.

27. The spectacle lens design data according to claim 25, wherein, The peripheral region (14) has a positive diffractive addition power and a negative diffractive addition power provided by one or more positive diffraction orders and one or more negative diffraction orders.

28. The spectacle lens design data according to any one of claims 25 to 27, wherein, The first transition region (20) is based on a bifocal diffraction efficiency having a non-zero diffraction efficiency in the first diffractive addition power and a non-zero diffraction efficiency in the second diffractive addition power.

29. The spectacle lens design data according to any one of claims 25 to 28, further comprising: An edge region (24) and a second transition region (22), the edge region being disposed radially outside the peripheral region (14), the second transition region being disposed between the peripheral region (14) and the edge region (24), wherein the edge region (24) has a zero diffractive additional power, and the second transition region (22) is adapted to adjust the diffractive efficiency from the second diffractive additional power to a zero diffractive additional power in a radially outward direction.

30. The spectacle lens design data according to claim 29, wherein, The second transition region (22) is based on a bifocal diffractive efficiency that has a non-zero diffractive efficiency in a diffractive order corresponding to the second diffractive additional power and a non-zero diffractive efficiency in the zero diffractive order.

31. The spectacle lens design data according to any one of claims 25 to 30, wherein, The uniform refractive power is adjusted to provide a focal point in front of the wearer's retina, and wherein the central region (12) has a negative diffractive additional power such that the combination of the uniform refractive power and the negative diffractive additional power in the central region is adjusted to achieve emmetropia for the wearer.

32. The spectacle lens design data according to any one of claims 25 to 31, wherein, The first transition region (20), the peripheral region (14), and in the case of dependent claims 29 or 30, the edge region (24) and the second transition region (22) correspond to different viewing perspectives of a wearer wearing an ophthalmic lens manufactured according to the ophthalmic lens design of any one of claims 25 to 31.

33. An ophthalmic lens (10) manufactured using the ophthalmic lens design data of any one of claims 25 to 32.

34. A data set in the form of a computer-readable data signal, the data set comprising at least one of the following types of data: (i) A virtual representation of an ophthalmic lens (10) configured to be manufactured into the ophthalmic lens (10) according to claim 33; (ii) Data containing computer-readable instructions for controlling one or more manufacturing machines to manufacture the ophthalmic lens (10) according to claim 33.

35. A computer-readable storage medium having stored thereon the data set according to claim 34.

36. A method (600) configured to generate ophthalmic lens design data for an ophthalmic lens (10) by a computer device, the ophthalmic lens design data being adjusted such that the ophthalmic lens (10) has a refractive power and at least a partial diffractive additional power and is provided with: + A central region (12) having a zero first diffractive additional power and adjusted to achieve emmetropia for the wearer; and + a peripheral region (14) arranged radially outside the central region (12), wherein, The peripheral region (14) having a second diffractive additional power and adjusted to provide a focal point (202) in at least one of in front of the wearer's retina (18) or behind the wearer's retina (18); wherein the ophthalmic lens design data is adjusted such that the ophthalmic lens (10) further has: + A first transition region (20) disposed between the central region (12) and the peripheral region (14), Characterized in that The first transition region (20) is adapted to adjust the diffraction efficiency from the first diffraction addition power, which is zero, to the second diffraction addition power in a radially outward direction. The spectacle lens (10) has a uniform refractive power that extends at least over the central region (12), the peripheral region (14), and the first transition region (20), and the uniform refractive power is adjusted to achieve emmetropia for the wearer.

37. The method (600) according to claim 36, the method being further configured to manufacture a spectacle lens (10) using the spectacle lens design data.

Images