Eyeglass lens, eyeglass lens kit, and method of providing eyeglass lens design

Abstract

Eyeglass lens, eyeglass lens kit and method of providing an eyeglass lens design. An eyeglass lens is provided comprising an aperture having a refractive power and at least two annular focusing structures surrounding the aperture, the annular focusing structures providing an additional power of at least 0.5 dpt with respect to the refractive power provided by the aperture, at least one annular focusing structure consisting of lenslets abutting each other to form a ring of lenslets and providing a plurality of foci along an annular line, adjacent annular focusing structures being spaced apart from each other, characterized in that at least one annular focusing structure provides an annular focal line, an annular diffuser being arranged between and contiguously abutting adjacent annular focusing structures, one of the adjacent annular focusing structures consisting of lenslets abutting each other to form a ring of lenslets and providing a plurality of foci along an annular line, while the other of the adjacent annular focusing structures provides an annular focal line.

Description

[0001] This application is a divisional application of patent application filed on November 26, 2021, with application number 202180092006.4, international application number PCT / EP2021 / 083245, entitled "Design of spectacle lenses, method of manufacturing spectacle lenses and method of providing spectacle lenses for at least delaying the progression of myopia". Technical Field

[0002] This invention relates to the design of spectacle lenses, particularly for single-vision spectacle lenses, and to a method of manufacturing such lenses, wherein the lenses are positioned relative to the wearer's eyes according to a given actual wearing position. Additionally, this invention relates to a method for providing spectacle lenses based on measured eye data for at least slowing the progression of myopia. Background Technology

[0003] The incidence of myopia (shortsightedness) is rapidly increasing. Myopia significantly increases the risk of retinal detachment (depending on the degree of myopia), posterior polar cataracts, and glaucoma. The optical, visual, and potential pathological effects of myopia, and the resulting inconvenience and costs to individuals and society, necessitate effective strategies to slow the progression of myopia, prevent or delay its onset, or limit its incidence in children and young adults.

[0004] However, WO 2005 / 055891 A1 and WO 2007 / 092853 A2 disclose that peripheral retinal images (i.e., peripheral vision) play a major role in determining the overall length of the eye and are an effective stimulus to promote peripheral and total eye growth, which leads to axial elongation, overall increase in eye size, and myopia.

[0005] In the key experiment described in WO 2005 / 055891 A1, primates were reared with a ring-shaped diffuser placed in front of their eyes. The ring-shaped diffuser allows light from on-axis central objects to reach the eye unobstructed. The same ring-shaped diffuser scatters or diffuses light from off-axis peripheral objects. This scattering causes form deprivation only for off-axis objects in the peripheral field of vision, while maintaining clear vision in the central field. Visual scientists studying the development of myopia know that form deprivation applied to the entire visual field (or central field of vision) of the eye causes axial elongation, leading to myopia. In the experiment disclosed in WO 2005 / 055891 A1, involving form deprivation only in the peripheral field of vision, the eye also developed myopia due to axial elongation and eye growth.

[0006] In an extension of the experiment described in WO 2005 / 055891 A1, after significant myopia development, a ring-shaped diffuser was removed from some eyes. When the ring-shaped diffuser was removed, the amount of myopia in the primates decreased.

[0007] Furthermore, in a parallel extension of the experiment, for other eyes, in addition to removing the ring diffuser after significant myopia development, central vision in the primate eyes was eliminated by photocoagulation using an argon (blue-green) laser, essentially blinding the central vision while preserving peripheral vision. Even when on-axis central foveal vision was interrupted in this manner, the reduction in myopia remained similar to when central vision was not interrupted.

[0008] Based on the lessons learned from these experiments demonstrating that peripheral retinal images (i.e., peripheral vision) play a major role in determining the overall eye length and are an effective stimulus promoting peripheral and overall eye growth, which leads to axial elongation, an overall increase in eye size, and myopia, WO 2005 / 055891 A1 discloses a method to mitigate, delay, or eliminate individual myopia progression by manipulating the field curvature of the visual image in a predetermined manner to control off-axis aberrations and ultimately alter, reduce, or eliminate axial elongation. In this method, which can delay (and in many cases, stop or reverse) myopia progression, an optical device with a predetermined off-axis aberration control design is used, which mitigates, delays, or eliminates eye growth while providing clear central imaging.

[0009] The authors of WO 2005 / 055891 A1 describe methods and apparatus for controlling optical aberrations to alter relative field curvature by providing ophthalmic devices, systems, and methods, which include predetermined correction factors to generate at least one significantly corrective stimulus for repositioning peripheral, off-axis, or focal points relative to the central, on-axis, or axial focal point, while maintaining the central, on-axis, or axial focal point's position on the retina. These methods and apparatus are intended to provide continuous, useful, clear visual images while slowing or mitigating the progression of myopia.

[0010] The authors propose that optical devices (such as eyeglasses, contact lenses, artificial corneal devices (such as supra- and in-line), corneal implants, anterior chamber lenses, or intraocular lenses) or interventions (such as methods for corneal and epithelial remodeling and reshaping, including orthokeratology and refractive surgeries, such as keratomileusis, thermal keratomileusis, LASIK, LASEK, and PRK) can provide the resulting negative relative field curvature at the retina. Furthermore, in order to continue to provide good central visual acuity for critical visual tasks, optical devices or interventions should ensure good focusing of the central field image to the retina.

[0011] Documents WO 2005 / 055891 A1 and WO 2007 / 092853 A2 disclose a suitable spectacle lens. This lens is designed to produce a negative relative field curvature on the eye. According to the authors, this arrangement is advantageous over traditional undercorrection methods because the central, on-axis image point is clearly focused on the fovea, resulting in good visual acuity. Due to the negative relative field curvature, the peripheral image point focuses further forward or in front of the retina (i.e., in the direction opposite to the direction of light in the eye). This has a relative undercorrection effect on the peripheral field, which, according to experimental results, controls eye growth and axial elongation. In other words, due to the more forward position of the off-axis peripheral field image point, the stimulation of axial growth in the eye is significantly reduced, eliminated, or reversed, thereby reducing or eliminating myopia development or reducing and even reversing myopia progression.

[0012] The first version of an eyeglass lens using this method was developed in collaboration between the Carl ZeissVision group and the Brian Holden Vision Institute. One of the first eyeglass lens designs following this method was disclosed, for example, in WO 2007 / 041796 A1.

[0013] Another eyeglass lens design, launched under the trademark Myovision, was disclosed, for example, in WO 2009 / 052570 A1.

[0014] According to Professor Schäffel's presentation entitled "Myopilux bei Kindern – Professor Dr. Frank Schaeffel and Dr. Hakan Kaymak (2019 Innovation Seminar)" held in Düsseldorf on January 19, 2019, Essilor sells similar designs under the Myopilux trademark.

[0015] Other lens designs following the theory described in WO 2005 / 055891 A1 are disclosed in WO 2009 / 129528 A1, specifically assigned to Novartis AG. These lens designs are characterized by a peripheral optical zone surrounding the central area. This peripheral zone includes an angle of incidence of approximately 30 degrees relative to the optical axis and has a positive peripheral refractive power relative to the refractive power of the central area of ​​the lens, thereby providing peripheral defocus for myopia. While WO 2009 / 129528A1 indicates the suitability of these lenses for eyeglasses, the aforementioned co-applicant specifically points to designs for contact lenses.

[0016] Coopervision contact lenses, particularly those well-known for their market success, are based on principles disclosed, for example, in WO 2010 / 129465 A1. The ophthalmic lens disclosed therein includes or has a vision-correcting region and a myopia-defocusing region. In the example disclosed in WO 2010 / 129465 A1, the ophthalmic lens is a contact lens comprising a ring-shaped region having three sub-rings surrounding a central region. While two of the sub-rings belong to the myopia-defocusing region, a third sub-ring, separating the two sub-rings belonging to the myopia-defocusing region, belongs together with the central region to the vision-correcting region. The vision-correcting region and the myopia-defocusing region define the optical zone of the contact lens. The optical zone is surrounded by a non-optical peripheral region extending from the outer perimeter of the optical zone to the peripheral edge of the contact lens. The optical zone comprises or consists of multiple concentric rings surrounding the central circular region.

[0017] The central area of ​​a contact lens is circular or substantially circular and can have a distance vision power and a diameter greater than 2.0 mm. The diameter of the central area can be determined by measuring a straight line through the optical axis to the relative perimeter boundary of the central area in a two-dimensional frontal view of the contact lens.

[0018] Similar designs, reportedly applicable to contact lenses and eyeglass lenses, were also disclosed in US 2016 / 054588 A1, US 2017 / 276961 A1, and US 2019 / 227342 A1, which were transferred to Johnson & Johnson.

[0019] Specifically, US 2019 / 0227342 A1 discloses an ophthalmic lens having a central region and at least one treatment region surrounding the central region, the central region having a negative optical power for myopia correction. The at least one treatment region has a power distribution including an additional anode (ADD). The at least one treatment region has a surface shape forming part of a generally annular shape. The at least one treatment region is arranged to form a continuous surface with the central region. As an example, the toroidal shape portion can be obtained from a torus (e.g., a spherical torus), wherein a slice passing through the surface of the spherical torus to produce the toroidal shape portion includes a positive conical surface, wherein the principal axis of the cone coincides with the axis of rotation about which the annulus is formed. The treatment region can be configured to produce an annular focus. The position of the focal ring can depend on the optical power of the treatment region.

[0020] According to US 2019 / 0227342 A1, the optical function of radially concentric multi-zone ophthalmic lenses, at least for spherical correction purposes, most typically derives from the anterior and posterior surfaces. One of these surfaces may be spherical or ellipsoidal in nature. The other surface typically has a spherical or ellipsoidal cap, followed by one or more curved sections, each curved section being a spherical or ellipsoidal truncated cone (“zone”) surface, which are arranged symmetrically to form a continuous surface. These zones may be radially concentric and optically coaxial around a common axis.

[0021] Each truncated cone can be produced by cutting a sphere or ellipsoid of appropriate size and shape to achieve the desired optical power perpendicular to the principal axis of such sphere or ellipsoid. In some cases, transitional zones may be required (e.g., optical dysfunction) to allow the individual zones to form a continuous surface. For myopia treatment, some zones will typically produce a higher wavefront number than one or more zones dedicated to correcting distance vision, where the wavefront number is obtained relative to the radial distance from the principal axis (dW / dr). Light rays parallel to the common axis and passing through the zones will become the principal focal points of each zone, and these focal points will lie on the common axis of the rotationally symmetric zones. When ophthalmic lenses are used to correct visual acuity and have principal focal points with different focal lengths in one or more zones, the image formed at the retina of the eye may be accompanied by double vision or halos, leading to visual impairment.

[0022] US 2019 / 0227342 A1 discloses embodiments having zones (or design zones for replacement lenses) having a surface shape derived from a toroidal shape (e.g., a spherical torus), or, in the case of replacing multiple zones, having a surface shape derived from one or more toroidals. As an example, after slicing the surface of a spherical torus in the shape of a conical surface, a portion of the toroidal shape to be used can be obtained from the torus (e.g., a spherical torus), wherein the principal axis of the cone coincides with the axis of rotation about which the torus is generated. The toroidal portion forming part of the lens surface is arranged to form a continuous surface with other zones of the lens or connected by transitional regions of optical dysfunction to allow the individual zones to form continuous surfaces. Other slices (conical or other slices) besides those outlined in the document are indicated as suitable for use.

[0023] Hong Kong Polytechnic University and Hoya Corporation of Japan recently disclosed a different type of spectacle lens that follows the general method described in WO 2005 / 055891 A1. Hoya sells this spectacle lens under the trademark MyoSmart. The spectacle lens is called an MSMD (multisegment myopic defocus) lens. The corresponding technical concept is called DIMS (Defocus Incorporated Multiple Segments) technology. A corresponding spectacle lens is disclosed in US 2017 / 131567 A1. The spectacle lens includes a central zone providing full correction and multiple microlenses / small lenses surrounding the central zone providing, for example, an additional power of approximately 3.5D. Similar methods for Essilor's Stellest spectacle lenses are described in detail in EP 3 553594 A1, EP 3 561 578 A1, WO 2019 / 166653 A1, WO 2019 / 166654 A1, WO 2019 / 166655 A1, WO 2019 / 166657 A1, WO 2019 / 166659 A1, and WO 2019 / 206569 A1. The microlenses are aspherical and have an absolute power ranging from 2.0 dpt to 7.0 dpt at their geometric center, and an absolute power ranging from 1.5 dpt to 6.0 dpt at their periphery. The optical refractive power provided by the aspherical microlenses exceeds the refractive power of the clear central area by 0.5 dpt or more.

[0024] Furthermore, WO 2020 / 014613A1, assigned to Sightglass Vision Inc., recently disclosed a myopia control spectacle lens that may include one or more defocusing elements, i.e., the myopia control spectacle lens may include a clear center without said defocusing elements. This provides a safe, effective, and non-invasive method for reducing the progression of myopia in adolescents by having children wear spectacle lenses with myopia control lenses to treat children with or suspected of having myopia. Exemplarily, the document relates to areas including island lenses.

[0025] WO 2010 / 075319 A2 also relates to the importance of peripheral retinal images in determining myopic eye growth. This document proposes a treatment method for preventing, improving, or reversing eye length-related disorders, comprising: identifying the patient's eye length-related disorder; and inducing artificial blurring of the patient's peripheral vision to reduce the average spatial frequency of the image input to the retina of the eye, exceeding a threshold spatial frequency to inhibit further elongation of the patient's eye. Specifically, the document proposes providing the patient with spectacle lenses having a first region comprising a plurality of first elements selected from the group consisting of: (i) protrusions on the surface of the spectacle lens; (ii) depressions on the surface of the spectacle lens; (iii) a first translucent inclusion in the spectacle lens material; and (iv) a first transparent inclusion in the spectacle lens material having a refractive index different from that of the spectacle lens material. Generally, these elements are point-shaped elements having a non-zero density in the range of 0 to 8 points per square millimeter.

[0026] Improvements to this type of spectacle lens are disclosed in WO 2018 / 026697 A1 and WO 2019 / 152438 A1, respectively.

[0027] In particular, WO 2018 / 026697 A1 discloses a pair of eyeglasses comprising: an eyeglass frame; and an eyeglass lens mounted in the frame, the eyeglass lens comprising a dot pattern distributed on each eyeglass lens, the dot pattern comprising an array of dots spaced apart at a distance of 1 mm or less, each dot having a maximum size of 0.3 mm or less.

[0028] WO 2020 / 113212 A1 and contrast reduction areas, which include a scattering center and / or one or more small lenses, for reducing image contrast.

[0029] WO 2019 / 152438 A1 discloses an eyeglass lens comprising: a lens material having two opposing curved surfaces; and a scattering region surrounding a clear aperture, wherein the scattering region has a plurality of spaced-apart scattering centers whose size and shape are configured to scatter incident light, and the scattering centers are arranged in a pattern including irregular variations in the spacing between adjacent scattering centers and / or irregular variations in the size of the scattering centers.

[0030] WO 2010 / 075319 A2, WO 2018 / 026697 A1, WO 2019 / 152438 A1, and WO2020 / 014613A1 describe spectacle lenses with artificial peripheral scattering, while WO 2020 / 113212 A1 and WO 2020180817 A1 describe spectacle lenses with contrast-reducing regions comprising a scattering center and / or one or more small lenses for reducing image contrast. The introduction of artificial peripheral scattering contradicts some of the findings described in WO2005 / 055891 A1 and WO 2007 / 092853 A2 regarding annular diffused lenses; however, results from corresponding tests based on DOT spectacle lenses from VisionVision Ltd. have been disclosed as promising.

[0031] Each microlens / tint of the spectacle lens described in US 2017 / 131567 A1, EP 3 553 594 A1, EP 3 561 578 A1, WO 2019 / 166653 A1, WO20191 / 66654 A1, WO 2019 / 166655 A1, WO 2019 / 166657 A1, WO 2019 / 166659 A1, and WO 2019 / 206569 A1, as detailed above, must be manufactured individually. Therefore, there is a need for a spectacle lens that can be produced using simplified manufacturing techniques but still provides optical properties similar to those described above for controlling myopia progression.

[0032] US 2019 / 0227342 A1 discloses the use of toroidal surfaces instead of microlenses / small lenses to provide myopia defocus in contact lenses and spectacle lenses. However, a key feature disclosed in US 2019 / 0227342 A1 is that the toroidal portion forming part of the lens surface is arranged to form a continuous surface with other areas of the lens or connected by transitional regions of optical dysfunction to allow for continuous surfaces between the individual areas. Achieving continuity requires specific adjustments to the surface design of the contact lens or spectacle lens, meaning modification of the entire surface compared to a surface without toroidal surfaces. Additionally, specific adjustments are required during manufacturing. Furthermore, in cases with more than one toroidal surface, the areas between the toroids have at least no effect on slowing myopia progression.

[0033] WO 2020 / 113212 A1 discloses an eyeglass lens design that includes a region on the fovea that provides a focused image, the region being surrounded by a region having a focusing structure for producing myopic defocus or by a diffuse region.

[0034] WO 2019 / 166657 A1 is considered the closest prior art, disclosing an eyeglass lens design comprising an aperture that provides a focused image on a fovea and is surrounded by a focusing structure having a focal point for generating myopic defocus. The focusing structure of WO2019 / 166657 A1 provides a ring-shaped focal line or multiple focal points arranged along a ring line. Between the focusing structures surrounding the area providing the focused image, there is no means of preventing or mitigating myopia, meaning that the area with the focusing structure is not optimally used to prevent or mitigate myopia. Summary of the Invention

[0035] Compared to WO 2019 / 166657 A1, the first objective of this invention is to improve the spectacle lens design of WO 2019 / 166657 A1, thereby enhancing the effectiveness of the spectacle lens design in preventing or mitigating myopia.

[0036] A second object of the present invention is to provide a method for manufacturing spectacle lenses that allows for improvements to the spectacle lens design of WO 2019 / 166657 A1, thereby enhancing the effectiveness of the spectacle lens design in preventing or mitigating myopia.

[0037] A third object of the present invention is to make available a computer-implemented method for providing spectacle lens designs, which, compared with the spectacle lens designs disclosed in WO 2019 / 166657 A1, improves the effectiveness of the spectacle lens design in preventing or mitigating myopia.

[0038] The following definitions are used within the scope of this description:

[0039] Additional focal length

[0040] In the context of this specification, the term "additional power" applies to the optical power added to an eyeglass lens, where the original optical power of the eyeglass lens, with the aid of accommodation, provides a focused image on the fovea, while the additional power, when added to the original optical power of the eyeglass lens, provides myopic defocus. Additional power should not be confused with the downlighting of progressive multifocal lenses.

[0041] aperture

[0042] In the context of this specification, the term "aperture" applies to the area of ​​an eyeglass lens surrounded by one or more annular structures. In some variations of the aperture, multiple structures may be located within the aperture. These structures provide effects in addition to the optical power provided by the eyeglass lens in the area of ​​the aperture. However, the area occupied by the structures within the aperture should not exceed 20% of the total area of ​​the aperture. In other variations, the aperture has no structures, such that the aperture only exhibits the optical power provided by the eyeglass lens.

[0043] Actual wearing position

[0044] The actual wearing position is the position (including orientation) of the spectacle lens relative to the eyes and face during wear (DIN ISO 13666:2019, Section 3.2.36). The actual wearing position is determined by the actual forward tilt angle, the facial curvature of the actual wearing lens rim, and the distance between the apex of the lens. The actual viewing tilt angle is the vertical angle between the horizontal direction within a vertical plane containing the principal direction and the vertical direction perpendicular to the reference line passing through the apex of the grooves of the upper and lower lenses of the frame (DIN ISO 13666:2019, Section 3.2.37), where the principal direction is the direction of the line of sight to an object at infinity, measured with a habitual head and body posture when the eye is looking straight ahead (usually taken as the horizontal direction) (DIN ISO 13666:2019, Section 3.2.25), and the line of sight is the path of light from the point of interest (i.e., fixation point) in object space to the center of the entrance pupil of the eye and its continuation in image space from the center of the exit pupil to the fixation point on the retina (usually the fovea) (DIN ISO 13666:2019, Section 3.2.24). Typical values ​​for the actual viewing tilt angle are in the range of -20 degrees to +30 degrees. The actual facial curvature of the lens is the horizontal angle between the principal direction and the vertical direction of the reference line passing through the apex of the grooves of the nasal and temporal rims of the frame within a horizontal plane containing the principal direction (DIN ISO 13666:2019, Section 3.2.38). Typical values ​​for the actual facial curvature of the lens are between -5 degrees and +30 degrees. Vertex distance is the horizontal distance between the posterior surface of the lens and the apex of the cornea, measured with the eye in the primary gaze position (DIN ISO 13666:2019, Section 3.2.40), where primary gaze position is the position of the eye when looking in the principal direction (DIN ISO 13666:2019, Section 3.2.26). Typical values ​​for vertex distance are between 5 mm and 30 mm. The actual wearing position can be an individual actual wearing position determined for a specific individual or a generic actual wearing position determined for a defined group of wearers.

[0045] Central District

[0046] In the context of this invention, the central region is the area surrounded by a surrounding region of an eyeglass lens or an eyeglass lens design, the optical characteristics of which differ from those of the surrounding central region.

[0047] Clear area

[0048] In the context of this specification, the term "zone of clarity" applies to areas in spectacle lens design or spectacle lenses that, when viewed through the zone of clarity with the lens positioned according to the specified actual wearing position, provide neither myopic defocus nor diffusion in foveal vision. Furthermore, the zone of clarity allows for a focused image to be achieved in the fovea with the aid of accommodation if necessary. There may be areas in spectacle lens design or spectacle lenses that, when viewed through the lens, provide neither myopic defocus nor diffusion in foveal vision, but instead exhibit residual astigmatism errors that cause image blurring. Such areas are not considered zones of clarity in the sense used in this specification.

[0049] Contact line

[0050] In the context of this specification, the term "contact line" is used to describe the contact area between two adjacent structures that are connected to each other, wherein the geometric surfaces of the structures are such that they cannot be distinguished continuously in the direction passing through the contact area.

[0051] Data carrier signal

[0052] A data carrier signal is one or more electrical or optical pulses that represent data when propagating over a wired or wireless network.

[0053] diffuser

[0054] In optics, a diffuser (also called a light diffuser or optical diffuser) is an optical element made of any material that diffuses or scatters light in a way that transmits soft light. Scattered light can be readily obtained by reflecting light from a white surface, while more compact diffusers can use translucent materials, including frosted glass, Teflon, holographic materials, milky white glass, and gray glass. Scattering can be achieved through scattering centers, which can be point-like, examples of which are disclosed in WO2010 / 075319 A2, WO 2018 / 026697 A1, WO 2019 / 152438 A1, and WO 2020 / 014613 A1, respectively. Scattering centers can also be linear, for example, in cases with continuous connections having discontinuous transitions and / or non-smooth transitions.

[0055] Focal density

[0056] The term "power" is a collective term for the spherical power (which brings a paraxial parallel beam to a single focal point, and is usually referred to in prescriptions as the "spherical" value or abbreviation "sph") and the cylindrical power (which brings a paraxial parallel beam to two separate focal lines perpendicular to each other (DIN ISO 13666:2019, Section 3.10.2), and is usually referred to in prescriptions as the "cylindrical" value or abbreviation "cyl"). "Power" is the reciprocal of the paraxial focal length (DIN ISO 13666:2019, Section 3.10.7). Within the scope of this specification, a beam is considered a paraxial beam if its diameter does not exceed 0.05 mm, particularly 0.01 mm.

[0057] Small lenses or microlenses

[0058] In the context of this invention, the terms "microlens" or "micro-lens" refer to a small, approximately spherical or ellipsoidal convex structure of a lens disposed on the surface of an eyeglass lens and having a lateral dimension at least one order of magnitude smaller than the size of the eyeglass lens itself, or to a small region disposed in the body of an eyeglass lens having a refractive index distribution, wherein the refractive index distribution has a lateral dimension at least one order of magnitude smaller than the size of the eyeglass lens itself.

[0059] When the microlenses or small lenses are convex structures, they are considered adjacent to each other if a path exists between the centers of two microlenses that does not pass through a region having only a surface (on which the microlenses or small lenses are formed). Similarly, when the microlenses or small lenses have a refractive index distribution, they are considered adjacent to each other if a path exists between the centers of two microlenses that does not pass through a region having the refractive index of the lens body.

[0060] Myopia defocus

[0061] The term "myopic defocus" refers to a situation where light focuses at a distance in front of the fovea, such that even with accommodation, it is impossible to achieve a focused image on the fovea. Peripheral myopic defocus occurs outside the fovea and into the field of vision.

[0062] Surrounding areas

[0063] In the context of this invention, the peripheral area should be understood as an area of ​​an eyeglass lens or an eyeglass lens design such that the area surrounds the central area and corresponds to peripheral vision when the wearer of the eyeglass lens looks through the central area.

[0064] prescription

[0065] The term "prescription" refers to a summary of refractive powers specified in appropriate values ​​for correcting a diagnosed refractive error. In the case of spherical power, the prescription may include a spherical "sph" value. In the case of astigmatism, the prescription may include a cylindrical "cyl" value and an axis value, and in the case of prism power, the prescription may include a prism value and a base curve value. Furthermore, the prescription may include other values, such as an "add" value in the case of multifocal spectacle lenses, which specifies the difference between the vertex power of the near-vision portion of the spectacle lens and the vertex power of the distance-vision portion. The interpupillary distance (PD) value may also be included in the prescription.

[0066] Representation of eyeglass lenses

[0067] In the context of this invention, the expression "representation of spectacle lens design" refers to either a way of realizing a spectacle lens with corresponding design features (physical representation of spectacle lens design) or a digital dataset describing the design features (digital representation of spectacle lens design). For example, such a dataset can be stored in a computer's memory or on a computer-readable (especially non-transitory) storage medium. Alternatively, the dataset can be obtained from a data network, such as the Internet or a local area network (LAN). In particular, a dataset similar to a representation of a progressive spectacle lens design can include a description of the geometry and medium of the progressive spectacle lens. This description can, for example, include a mathematical description of the front surface, the back surface, the arrangement of these surfaces relative to each other (including thickness), the edge definition of the progressive spectacle lens, and the refractive index distribution of the medium used to make the progressive lens. This representation can be in coded or even encrypted form. The term "medium" here refers to the (various) materials or substances used to make the spectacle lens.

[0068] The representation of a progressive spectacle lens design may additionally or alternatively include computer-readable instructions for controlling one or more manufacturing machines (e.g., casting, grinding, milling, lapping and / or polishing machines) to produce spectacle lenses with the corresponding design features.

[0069] Ring

[0070] If a structure surrounds an unstructured region and the structure has a path that extends from a starting point within the structure around the unstructured region and back to the starting point, then the structure should be considered circular.

[0071] Ring-shaped focusing structure

[0072] In the context of this specification, the term "annular focusing structure" applies to a structure that provides an annular focal line and to an annular ring of small lenses that are adjacent to each other to form a lens and provide multiple (e.g., equidistantly arranged, preferably primarily linear or point-like) focal points along the annular line. The small lenses do not need to be circular. Such annular focusing structures may, for example, include structures similar to those described in EP 3 561 578 A1.

[0073] In the context of this invention, adjacent small lenses refer to small lenses that do not have space between them that does not contribute to the focal power of the small lens. When the small lens is a small convex structure, adjacent small lenses are adjacent small convex structures having at least one common point. An example of such adjacent small lenses is disclosed, for instance, in Figure 12 of EP 3 561578 A1. When the small lens is a small region providing a refractive index distribution, adjacent small lenses are adjacent small regions of the refractive index distribution having overlapping points or regions.

[0074] semi-finished blanks

[0075] The term "semi-finished blank" refers to a piece of optical material having an optically finished surface for making spectacle lenses (DIN ISO 13666:2019, Section 3.8.1).

[0076] Eyeglass lenses

[0077] An eyeglass lens is an ophthalmic lens that is worn in front of the eyeball but does not come into contact with it (DIN ISO 13666:2019, Section 3.5.2). Ophthalmic lenses are lenses designed to measure, correct and / or protect the eye, or alter its appearance (DIN ISO 13666:2019, Section 3.5.1).

[0078] The term "uncut spectacle lens" (DIN ISO 13666:2019, Section 3.8.8) refers to the finished lens (3.8.7) before edging (3.8.10). Therefore, "cut spectacle lens" refers to the finished lens after edging.

[0079] This invention refers to both "uncut" and "cut spectacle lenses" and their corresponding designs, because the wearing position can be determined based on the corresponding markings, as defined in Section 3.15.25 of the aforementioned standard (see DIN ISO 13666:2019, Section 3.9, Measurement Purpose). However, the wearing position can also be derived from the rim profile of a "cut spectacle lens".

[0080] Eyeglass lens design

[0081] The term "spectacle lens optical design" is used to describe the calculated / predetermined or defined optical characteristics of a spectacle lens, typically for a specific wearer, taking into account the position / arrangement of the spectacle lens relative to the eye model of the spectacle lens wearer, the position / arrangement of the object model to be viewed by the spectacle lens wearer under specific conditions of use of the spectacle lens, and the physiological visual characteristics model of the spectacle lens wearer.

[0082] In particular, the optical design of spectacle lenses can include the optical power distribution over the effective area of ​​the lens, which is perceived by a intended wearer of the spectacle lens at a predetermined actual wearing position relative to the wearer's (model) eye and a predetermined object distance model. The calculation of the optical power distribution is based on the distance and orientation of the spectacle lens relative to the model eye, the distance and orientation of the spectacle lens relative to the model object, and the physiological parameters of the spectacle wearer, such as the wearer's visual impairments, i.e., refractive errors, accommodative ability, and pupillary distance.

[0083] The term "spectacle lens geometry" refers to the geometry of a spectacle lens that provides the optical properties of the spectacle lens as calculated above for the wearer.

[0084] The term "target optical design for spectacle lenses" refers to a draft optical design for spectacle lenses whose optical characteristics correspond to or are equal to target optical characteristics. The term "actual optical design for spectacle lenses" refers to the calculated optical characteristics of spectacle lenses obtained as a result of an optimization process / calculation aimed at achieving the target optical design for the spectacle lenses as closely as possible. Such optimization processes / calculations, particularly for progressive spectacle lenses or custom-made single-vision lenses, are disclosed, for example, in "WernerKöppen: Konzeption und Entwicklung von Progressivgläsern, in Deutsche OptikerZeitung DOZ 10 / 95, pp. 42-46".

[0085] The optical or geometric design of such eyeglass lenses can be stored on a computer-readable (e.g., non-transitory and / or electronic and / or optical) data carrier. Furthermore, eyeglass lenses manufactured according to this design can be considered a physical representation of that design.

[0086] The following outlines the basic steps of an example method for designing eyeglass lenses:

[0087] In the first step, individual user data or application data of the eyeglass wearer is recorded. This includes acquiring (physiological) data that can be assigned to the eyeglass wearer and obtaining the usage conditions under which the eyeglass wearer will wear the eyeglasses to be designed.

[0088] Physiological data for eyeglass wearers may include, for example, the wearer's refractive error and accommodative ability, which are determined by refractive measurements and regularly included in the prescription in the form of spherical power, cylindrical power, axis, prism power, base curve, and additional refraction. Furthermore, pupillary distance and pupillary size, for example, are determined under different lighting conditions. The wearer's age affects accommodative ability and pupillary size and can therefore be taken into account. The eye's convergence behavior is obtained from pupillary distances for different viewing directions and object distances.

[0089] These usage conditions include the actual wearing position of the spectacle lenses in front of the eyes (typically relative to the center of eye rotation) and the object distance at which the wearer should be able to see clearly for different viewing directions. For example, the placement of the spectacle lenses in front of the eyes can be determined by recording the corneal apex distance, as well as the anterior and lateral tilt angles. This data is included in an object distance model, to which ray tracing can be applied.

[0090] In subsequent steps, a draft design for the spectacle lens with numerous evaluation points is determined based on the data from these records. This draft design includes the target optical characteristics of the spectacle lens at the respective evaluation points. Target characteristics include, for example, prescription spherical power and permissible astigmatism deviations considering the distribution of added light across the entire spectacle lens, as specified by the lens placement in front of the eye and by a baseline distance model.

[0091] Furthermore, the design of the surface geometry of the front and rear surfaces, as well as the design of the refractive index distribution across the entire spectacle lens, are specified. For example, the front surface can be chosen as a spherical surface, and the rear surface can be chosen as a zoom surface. Both surfaces can initially be chosen as spherical surfaces as well. The choice of surface geometry in this first draft generally determines only the convergence (speed and success) of the optimization method used. It should be assumed, for example, that the front surface retains a spherical shape, while the rear surface is given the shape of a zoom surface.

[0092] In a further step, the path of the principal rays is determined through a large number of evaluation points. It is possible that a local wavefront can be established near each principal ray for that specific ray. According to "Werner Köppen: Design and Development of Progressive Lenses, Deutsche Optiker Zeitung, DOZ 10 / 95, pp. 42-46", the number of evaluation points is typically between 1000 and 1500. EP 2 115 527 B1 recommends over 8000 evaluation points. Although the refractive index is generally dependent on the wavelength, dispersion is usually not considered, and calculations are performed for the so-called design wavelength. However, it cannot be ruled out that the optimization process will take into account different design wavelengths, as described in EP 2 383 603 B1, for example.

[0093] In subsequent steps, the aforementioned optical properties of the spectacle lens at the corresponding evaluation point are determined by determining the effect of the spectacle lens on the beam path of the principal ray and, if necessary, by determining the local wavefront near the evaluation point.

[0094] In further steps, the spectacle lens design is evaluated based on the determined optical properties and the individual user data. The back surface geometry and, depending on the situation, the refractive index distribution of the spectacle lens design can be modified by minimizing the objective function, for example...

[0095]

[0096] Where P m W represents the weight at evaluation point m. n The weight of optical property n, T n Let A represent the target value of the optical property n at the corresponding evaluation point m, and A n This represents the actual value of the optical property n at the evaluation point m.

[0097] In other words, the local surface geometry of the rear surface and, depending on the situation, the local refractive index of the spectacle lens in the corresponding visual beam path are modified by evaluating points until the termination criteria are met.

[0098] According to the present invention, a spectacle lens design is provided for spectacle lenses.

[0099] According to a first aspect of the invention, the spectacle lens design includes an aperture and at least two annular focusing structures, the aperture having refractive power, the at least two annular focusing structures surrounding the aperture and providing additional power relative to the refractive power provided by the aperture. An annular diffuser is arranged between adjacent annular focusing structures.

[0100] According to a first aspect of the invention, adjacent annular focusing structures are adjacent to each other through a diffuser therebetween.

[0101] The following options are available:

[0102] a) Adjacent annular focusing structures, connected to each other by their annular contact lines, each provide an annular focal line, wherein the annular contact lines form a diffuser.

[0103] b) Adjacent annular focusing structures are each composed of small lenses that are adjacent to each other to form a ring of small lenses, and provide multiple focal points along the annular line, wherein a diffuser fills the space between adjacent annular focusing structures.

[0104] c) One of the adjacent annular focusing structures provides an annular focal line, while the other of the adjacent annular focusing structures consists of small lenses that are adjacent to each other to form a ring of small lenses and provide multiple focal points along the annular line, wherein the diffuser fills the space between the adjacent annular focusing structures.

[0105] According to a second aspect of the invention, at least one of the annular focusing structures provides an annular focal line, and adjacent annular focusing structures are arranged at a distance from each other. Annular diffusers are connected adjacent to adjacent annular focusing structures.

[0106] According to a third aspect of the invention, at least one of the annular focusing structures comprises small lenses adjacent to each other to form a ring of small lenses, and provides a plurality of focal points along the annular line, with adjacent annular focusing structures spaced apart from each other. Annular diffusers are connected adjacent to adjacent annular focusing structures.

[0107] There are three options:

[0108] Option B1: The annular focusing structure providing the annular focal line is adjacent to the annular focusing structure providing the annular focal line, and the diffuser is located between them.

[0109] Option B2: A focusing structure providing multiple focal points along the ring line is adjacent to another focusing structure providing multiple focal points along the ring line, with a diffuser located between them.

[0110] Option B3: The annular focusing structure providing the annular focal line is adjacent to the focusing structure providing multiple focal points along the annular line, and the diffuser is located between them.

[0111] According to a fourth aspect of the invention, the innermost annular focusing structure is directly adjacent to the aperture, and the annular diffuser fills the area between adjacent annular focusing structures.

[0112] The spectacle lens design of the present invention can be a spectacle lens design for single-vision spectacle lenses, particularly for single-vision spectacle lenses having an aperture centered on the optical axis of the single-vision spectacle lens.

[0113] The intent of this invention is to replace, for example, the multiple microlenses / tines disclosed in US 2017 / 131567 A1, EP 3 553 594 A1, EP 3 561 578 A1, WO 2019 / 166653 A1, WO 20191 / 66654 A1, WO 2019 / 166655 A1, WO 2019 / 166657 A1, WO 2019 / 166659 A1, and WO 2019 / 206569 A1 with a preferably concentrically arranged annular focusing structure. The annular focusing structure can be any curved shape, such as circular or elliptical or similar curved shapes, and can preferably be symmetrical about at least one axis. The annular focusing structure can be based on a toroidal structure surrounding an unstructured region or any other three-dimensional closed structure, cut into two pieces along a straight or curved surface such that both pieces remain annular. The annular focusing structure can then be represented by one of the two pieces. For example, a ring-shaped focusing structure can represent a torus or any other three-dimensional ring structure obtained by cutting a piece of the torus or other ring structure along a surface corresponding to the surface of the spectacle lens. The three-dimensional closed structure around the unstructured region on which the ring-shaped focusing structure is based can be particularly symmetrical in two planes perpendicular to each other, such as a torus that exhibits rotational symmetry in such planes. Preferably, the cross-section of a ring-shaped focusing structure is identical along the entire ring. At least two ring-shaped focusing structures preferably have cross-sections of the same shape (e.g., circular or elliptical cross-sections) and preferably have the same size. The cross-sections of all ring-shaped focusing structures are preferably identical in shape. Additionally, all cross-sections of all ring-shaped focusing structures can be the same size. Alternatively, the ring-shaped focusing structure can be formed from small lenses centered on the ring line and adjacent to each other.

[0114] This invention provides a spectacle lens design in which not only the annular focusing structure but also the area between the annular focusing structures is effective in at least slowing the progression of myopia. While the annular focusing structure is effective in at least slowing the progression of myopia by providing myopic defocus, the annular area between two annular focusing structures is effective in at least slowing the progression of myopia by reducing contrast through a diffuser formed in the annular area. Furthermore, the spectacle lens design of this invention allows for the manufacture of the corresponding spectacle lens through a two-step process: providing a spectacle lens without the annular focusing structure, and then applying the annular focusing structure to the surface of the spectacle lens. This can be done without modifying the entire surface of the spectacle lens design. Additionally, compared to using microlenses / small lenses, the number of structural elements to be applied to the surface is significantly reduced when using an annular focusing structure that provides an annular focal line. When using such an annular focusing structure composed of small lenses adjacent to each other to form a ring and providing multiple focal points along the annular line, i.e., when the small lenses are arranged along a one-dimensional structure, the position of the small lenses can be described with fewer parameters compared to small lenses arranged in a two-dimensional array. Therefore, compared to spectacle lens designs according to the prior art, the manufacturing technology is significantly simplified when producing spectacle lenses based on the spectacle lens design of this invention.

[0115] According to a first aspect of the invention, the annular contact lines form an annular diffuser, which is formed simultaneously with the annular focusing structure, since the contact lines form scattering centers. Therefore, the additional step of forming the diffuser is unnecessary. However, although the number of diffusers can be increased by increasing the number of annular focusing structures and thus the number of annular contact lines, this option does not allow for changing the width of the diffuser.

[0116] According to the second and third aspects of the invention, adjacent annular focusing structures are arranged at a distance from each other, and an annular diffuser exists between and adjacent annular focusing structures. This option provides an additional design parameter in spectacle lens design, namely the width of the diffuser. However, compared to the first aspect of the invention, this is accompanied by an additional manufacturing step, namely the step of forming a scattering center in the annular region where the diffuser will be formed.

[0117] According to a fourth aspect of the invention, there is no diffuser between the aperture and the innermost focusing structure. In WO2005 / 055891 A1, the diffuser is suspected of acting as a promoter of myopia. Therefore, by preventing the diffuser from being too close to the aperture in the region inside the innermost focusing structure, unintentional promotion of myopia can be prevented.

[0118] According to all aspects of the invention, at least two annular focusing structures can provide an additional focal length of at least 0.5 dpt. Having an additional focal length of at least 0.5 dpt prevents the focusing structures from providing excessively low additional focal length.

[0119] In a further advantageous development of the spectacle lens design of the present invention, at least two of the annular focusing structures provide myopic defocus at the same distance from the fovea. This measure avoids ghosting and halos in peripheral vision.

[0120] In the spectacle lens design of this invention, a ring-shaped focusing structure and a diffuser can be present on the rear surface of the spectacle lens. This allows for the use of a semi-finished blank manufacturing process. Such a semi-finished blank typically has a finished front surface, while only the rear surface is machined to manufacture the spectacle lens. Having a ring-shaped focusing structure on the rear surface of the spectacle lens design allows the application of the ring-shaped focusing structure and the diffuser structure to be integrated into the manufacturing process using the semi-finished blank.

[0121] Additionally, according to the present invention, a method for manufacturing spectacle lenses positioned relative to a wearer's eye is provided. The method includes forming at least a portion of the spectacle lens to provide refractive power, and forming at least two annular focusing structures such that the at least two annular focusing structures surround an aperture providing the refractive power, the at least two annular focusing structures providing additional focal power relative to the refractive power. An annular diffuser is formed between adjacent annular focusing structures.

[0122] According to a first aspect of the invention, adjacent annular focusing structures are formed to be adjacent to each other through annular contact lines therebetween, wherein the contact lines form annular diffusers.

[0123] According to a second aspect of the invention, at least one of the annular focusing structures is configured to provide an annular focal line, and adjacent annular focusing structures are spaced apart from each other. An annular diffuser is configured to be connected adjacent annular focusing structures.

[0124] According to a third aspect of the invention, at least one of the annular focusing structures is formed by small lenses adjacent to each other to form a ring of small lenses, and provides a plurality of focal points along the annular line, with adjacent annular focusing structures spaced apart from each other. An annular diffuser is formed adjacent to adjacent annular focusing structures in a connected manner.

[0125] According to a fourth aspect of the invention, the innermost annular focusing structure is formed such that it is directly adjacent to the aperture, and the annular diffuser is formed such that it fills the area between the annular focusing structures.

[0126] The method of the present invention can be used to manufacture single-vision spectacle lenses, particularly single-vision spectacle lenses having an aperture centered on the optical axis of the single-vision spectacle lens.

[0127] The method of the present invention allows for the manufacture of spectacle lenses having at least two annular focusing structures, which are improvements over, for example, those disclosed in WO 2019 / 166657 A1, in terms of increased effectiveness in preventing or mitigating myopia. As mentioned above, the increased effectiveness is due to the presence of diffusers between adjacent annular focusing structures. Furthermore, the method of the present invention allows for the manufacture of spectacle lenses having at least two annular focusing structures without requiring modification of the entire surface of the spectacle lens design. Additionally, the number of structural elements to be applied to the surface is significantly reduced when using annular focusing structures compared to using microlenses / small lenses. Moreover, when using an annular focusing structure consisting of small lenses adjacent to each other to form a ring and providing multiple focal points along the annular line, i.e., when the small lenses are arranged along a one-dimensional structure, the positions of the small lenses can be described with fewer parameters compared to small lenses arranged in a two-dimensional array. Therefore, the method of the present invention allows for the manufacture of spectacle lenses having at least two annular focusing structures by means of a manufacturing technique that is significantly simplified compared to the prior art.

[0128] According to a first aspect of the invention, adjacent annular focusing structures are formed to be adjacent to each other by annular contact lines therebetween, and since the contact lines form scattering centers, the annular diffuser is formed simultaneously with the formation of the annular focusing structures. Therefore, the additional step of forming the diffuser is unnecessary. However, although the number of diffusers can be increased by increasing the number of annular focusing structures and thus the number of annular contact lines, adjacent annular focusing structures do not allow for changes in the width of the diffuser. Therefore, as an alternative, adjacent annular focusing structures can be formed spaced apart from each other. Then, according to the second and third aspects of the invention, annular diffusers are formed between the annular focusing structures so that the annular focusing structures are adjacent to each other. The distance between adjacent annular focusing structures provides an additional design parameter in spectacle lens design, namely the width of the diffuser. However, this comes at the cost of an additional manufacturing step compared to the first option, namely the step of forming scattering centers in the annular region, which ultimately forms the diffuser. The production of scattering centers can be accomplished, for example, by means of a laser that produces multiple point-like depressions, which are similar to the depressions disclosed in WO 2010 / 075319 A2, WO 2018 / 026697 A1, WO2019 / 152438 A1 and WO2020 / 014613 A1, respectively.

[0129] As done according to the fourth aspect of the invention, no diffuser is formed between the aperture and the innermost focusing structure, which prevents the diffuser from unintentionally promoting myopia due to its proximity to the aperture. In WO 2005 / 055891 A1, the diffuser is suspected of acting as a promoter of myopia.

[0130] At least two annular focusing structures can be configured such that the additional focal length provided by the annular focusing structures is at least 0.5 dpt. Having at least 0.5 dpt of additional focal length prevents the focusing structures from providing excessively low additional focal length.

[0131] To allow the application of annular focusing structures and diffusers to be integrated into a manufacturing process using a semi-finished blank with a finished front surface, at least two annular focusing structures can be formed on the rear surface of the spectacle lens.

[0132] In a particular development of the method of the invention, a spectacle lens is first formed, providing the power to form a focused image on the fovea in the actual wearing position. Then, at least two annular focusing structures are applied to the surface of the spectacle lens to surround an aperture of the lens, which becomes a portion of the spectacle lens that provides the power to form a focused image on the fovea. The at least two annular focusing structures can be applied to the surface of the spectacle lens by means of one of the following processes: molding, additive manufacturing, and swelling. This particular development of the method of the invention allows for the storage of spectacle lenses that provide the power to form a focused image on the fovea in the actual wearing position, and the application of annular focusing structures to the surface of such storage spectacle lenses.

[0133] Alternatively, at least two annular focusing structures can be formed using a material removal process, such as cutting. This allows the portion of the spectacle lens that provides the focal power for forming a focused image on the fovea, as well as the at least two annular focusing structures, to be formed in the same manufacturing steps.

[0134] Furthermore, according to the present invention, a computer-implemented method is provided for designing an eyeglass lens for at least delaying the progression of myopia. The method includes the steps of: determining an eyeglass lens having a refractive power; and determining at least two annular focusing structures to be positioned on the eyeglass lens around an aperture providing the refractive power, wherein the annular focusing structures provide additional focal power relative to the refractive power. The at least two annular focusing structures are determined to be positioned having an annular diffuser disposed therebetween.

[0135] According to a first aspect of the invention, at least two of the annular focusing structures are determined such that adjacent annular focusing structures are adjacent to each other through an annular contact line therebetween, the annular contact line forming an annular diffuser.

[0136] According to a second aspect of the invention, at least one of the annular focusing structures is configured to provide an annular focal line, and adjacent annular focusing structures are arranged at a distance from each other. An annular diffuser is configured to be adjacent to adjacent annular focusing structures in a connected manner.

[0137] According to a third aspect of the invention, at least one of the annular focusing structures is defined as consisting of small lenses adjacent to each other to form a ring of small lenses, and providing a plurality of focal points along the annular line, and adjacent annular focusing structures are defined as being spaced apart from each other. Annular diffuser shapes are defined as being connected adjacent annular focusing structures.

[0138] According to a fourth aspect of the invention, the innermost annular focusing structure is configured such that it directly adjoins the aperture, and the annular diffuser is configured such that it fills the area between the annular focusing structures.

[0139] The spectacle lens provided by the method of the present invention can be a single-vision spectacle lens, particularly a single-vision spectacle lens having an aperture centered on the optical axis of the single-vision spectacle lens. Alternatively, the spectacle lens can be a progressive lens, the aperture of which is centered on or near (e.g., at a distance of less than 2 mm) the near-vision design reference point (according to section 3.2.18 of DIN EN ISO 13666:2019) or the near-vision reference point (according to section 3.2.21 of DIN EN ISO 13666:2019) or the near-vision optical center (according to section 3.16.8 of DIN EN ISO 13666:2019).

[0140] The method of providing a spectacle lens design for at least slowing the progression of myopia according to the present invention provides a spectacle lens in which not only the annular focusing structure but also the area between the annular focusing structures is effective in at least slowing the progression of myopia. While the annular focusing structure is effective in at least slowing the progression of myopia by providing myopic defocus, the annular area between the two annular focusing structures is effective in at least slowing the progression of myopia by reducing contrast through a diffuser formed in the annular area. Therefore, compared with the spectacle lens design disclosed in WO 2019 / 166657 A1, the method of providing a spectacle lens design according to the present invention allows for a spectacle lens design with improved effectiveness in preventing or slowing the progression of myopia.

[0141] According to a first aspect of the invention, when at least two of the annular focusing structures are determined such that adjacent annular focusing structures are adjacent to each other through annular contact lines forming annular diffusers, the annular diffusers can be formed simultaneously with the formation of the annular focusing structures because the contact lines form scattering centers. On the other hand, according to a second and third aspect of the invention, when at least two of the annular focusing structures are determined such that adjacent annular focusing structures are arranged at a certain distance from each other and annular diffusers exist between and adjacent to the annular focusing structures, the distance between adjacent annular focusing structures provides an additional design parameter in the design of spectacle lenses, namely, the width of the diffuser.

[0142] As done according to the fourth aspect of the invention, determining the spectacle lens design such that no diffuser is formed between the aperture and the innermost focusing structure prevents the diffuser from unintentionally promoting myopia due to its proximity to the aperture. In WO2005 / 055891 A1, the diffuser is suspected of acting as a promoter of myopia.

[0143] In a further development of all aspects of the invention, at least two annular focusing structures can be determined such that the additional focal power provided by the annular focusing structures is at least 0.5 dpt. Having an additional focal power of at least 0.5 dpt prevents the focusing structures from providing excessively low additional focal power.

[0144] In an advantageous development of the method of the present invention, at least two of the annular focusing structures are determined such that the annular focusing structures provide myopic defocus at the same distance from the fovea. This measure avoids ghosting and halos in peripheral vision.

[0145] In a further development of the method of the present invention, at least two annular focusing structures are identified as allowing the annular focusing structure to be formed on the rear surface of the spectacle lens. This allows the formation of the annular focusing structure and the diffuser to be integrated into a manufacturing process using a semi-finished blank with a finished front surface.

[0146] Furthermore, determining the spectacle lens with refractive power and identifying at least two annular focusing structures can be based on measured eye data, which allows for the personalization of the determined spectacle lens design.

[0147] It should be noted that the annular focusing structure and the annular diffuser structure can be located on the same surface of the spectacle lens, or even formed on opposite surfaces. This combined structure can even be located on both sides of the spectacle lens. Alternatively, the annular focusing structure can be positioned within the spectacle lens by utilizing changes in the refractive index of the lens material.

[0148] Partial areas or all of one or more surfaces, including focusing and diffused structures, can be coated with corresponding functional coatings, such as hard coatings, anti-reflective coatings, cleaning coatings, anti-fog coatings, antistatic coatings, antibacterial coatings, antiviral coatings, etc.

[0149] According to a further aspect of the invention, the dataset includes at least one of the following types of data: (i) a digital representation of the spectacle lens design of the invention, and (ii) data containing computer-readable instructions for controlling one or more manufacturing machines to produce spectacle lenses according to the spectacle lens design of the invention.

[0150] According to a further aspect of the invention, a data carrier signal carrying at least one of the following types of data is provided: (i) a digital representation of the spectacle lens design of the invention, and (ii) data containing computer-readable instructions for controlling one or more manufacturing machines to produce spectacle lenses according to the spectacle lens design of the invention.

[0151] This dataset or this data carrier signal can be provided, for example, by a cloud server via a network, and can be used in a computer-controlled manufacturing process to manufacture eyeglass lenses based on eyeglass lens designs. Attached Figure Description

[0152] Other features, characteristics, and advantages of the invention will become clear from the following description of exemplary embodiments of the invention taken in conjunction with the accompanying drawings.

[0153] Figure 1 A first example of a spectacle lens with a ring-shaped focusing structure, designed according to spectacle lens specifications, is shown in a plan view.

[0154] Figure 2 The first example of eyeglass lens design is shown in a side view.

[0155] Figure 3 A second example of a spectacle lens with a ring-shaped focusing structure, based on spectacle lens design, is shown in a plan view.

[0156] Figure 4 A third example of a spectacle lens with a ring-shaped focusing structure, designed according to spectacle lens specifications, is shown in plan view.

[0157] Figure 5 The third example of eyeglass lens design is shown in a side view.

[0158] Figure 6 A flowchart is shown illustrating an example of a method for providing eyeglass lens designs that at least slow the progression of myopia.

[0159] Figure 7 A flowchart illustrating an example of a method for manufacturing eyeglasses with a ring-shaped focusing structure is shown.

[0160] Figure 8 A fourth example of a spectacle lens with a ring-shaped focusing structure, designed according to spectacle lens specifications, is shown in plan view.

[0161] Figure 9 An example of adjacent annular focusing structures is shown, each providing multiple focal points along the annular line.

[0162] Figure 10An example of adjacent annular focusing structures is shown, wherein one of the adjacent annular focusing structures provides multiple focal points along an annular line, while the other provides an annular focal line.

[0163] Figure 11 An example of adjacent annular focusing structures is shown, wherein one of the annular focusing structures provides multiple focal points along an annular line, while the other provides an annular focal line, wherein the annular focusing structures are positioned at intervals from each other. Detailed Implementation

[0164] Exemplary embodiments of the spectacle lens design of the present invention will be combined with Figures 1 to 5 as well as Figures 8 to 11 The figures illustrate examples of eyeglass lenses based on various eyeglass lens designs of the present invention.

[0165] In all embodiments, spectacle lenses (in) Figures 1 to 5 The reference numerals 2, 12, and 22 (represented by reference numerals 2, 12, and 22) include at least two annular focusing structures 5a-e, 15a-e, and 25a-d in the peripheral areas of spectacle lenses 2, 12, and 22. The annular focusing structures 5a-e, 15a-e, and 25a-d surround apertures 4, 14, and 24 representing the inner central area of ​​spectacle lenses 2, 12, and 22. In this embodiment, this inner central area is a clear area with distance vision correction characteristics according to the prescription. Alternatively, the inner central area may be a clear area with near vision correction characteristics. The annular focusing structures 5a-e, 15a-e, and 25a-d are designed to provide an additional power of at least 0.5 dpt relative to the refractive power provided by the clear area formed by the apertures 4, 14, and 24 of spectacle lenses 2, 12, and 22, which is typically in the range of 0.5 dpt to 5 dpt. Therefore, when the wearer views through apertures 4, 14, and 24 and the lens of the eye focuses on the fovea, the annular focusing structures 5a-e, 15a-e, and 25a-d provide myopic defocus to the periphery of the retina. At least two of the annular focusing structures 5a-e, 15a-e, and 25a-d can provide myopic defocus if the wearer focuses on the fovea when viewing through apertures 4, 14, and 24, and this myopic defocus is located at the same distance from the retina. In particular, all of the annular focusing structures 5a-e, 15a-e, and 25a-d can provide myopic defocus if the wearer focuses on the fovea when viewing through apertures 4, 14, and 24, and this myopic defocus is located at the same distance from the retina.

[0166] In all exemplary embodiments of the spectacle lenses 2, 12, 22, the aperture 4, 14, 24 can have an extended range between 3 mm and 30 mm. In the case of a circular aperture 4, as in... Figure 1 and Figure 2In the exemplary embodiment shown, the diameter will be between 4 mm and 8 mm. In the case of elliptical apertures of 14 and 24, as in... Figures 3 to 5 In the exemplary embodiment shown, the short diameter is in the range of 4 mm to 8 mm, while the long diameter is at least larger than the short diameter, preferably at least twice the short diameter, but at most 30 mm.

[0167] The annular focusing structures 5a-e, 15a-e, and 25a-d can cover the entire spectacle lens 2, 12, and 22 except for apertures 4, 14, and 44. The annular focusing structures 5a-e, 15a-e, and 25a-d are preferably (but not necessarily) located on or within the rear surfaces 2b and 22b of the spectacle lenses 2, 12, and 22. In alternative embodiments, the annular focusing structures 5a-e, 15a-e, and 25a-d can also be located on or within the front surfaces of the spectacle lenses 2, 12, and 22. The front surfaces 2a and 22a of the spectacle lenses 2, 12, and 22 can have a spherical profile or a rotationally symmetric aspherical profile.

[0168] The materials used to fabricate the annular focusing structures 5a-e, 15a-e, and 25a-d can be the same as the materials used to manufacture the substrate materials for spectacle lenses 2, 12, and 22. However, some or all of the annular focusing structures 5a-e, 15a-e, and 25a-d may also be made of materials different from the substrate materials for spectacle lenses 2, 12, and 22.

[0169] The annular focusing structures 5a-e, 15a-e, and 25a-d can be manufactured as follows: First, spectacle lenses 2, 12, and 22 are provided, which provide the power to form a focused image on the fovea at the actual wearing position. Then, at least two annular focusing structures 5a-e, 15a-e, and 25a-d are applied to the surfaces of the spectacle lenses 2, 12, and 22. The at least two annular focusing structures 5a-e, 15a-e, and 25a-d can be applied to the surface of the spectacle lenses by means of one of the following processes: molding, additive manufacturing, and swelling (e.g., oleic acid swelling). In the latter, the substrate material of the spectacle lens will be an organic material, and oleic acid will be applied to a region of the front or rear surface of the spectacle lens, causing the organic material to swell. An example of a suitable additive manufacturing process that can also be used to apply the annular focusing structures to the surface of the spectacle lenses is inkjet printing. However, instead of providing spectacle lenses and applying the annular focusing structures 5a-e, 15a-e, 25a-d to the surface of the spectacle lenses, the annular focusing structures can also be manufactured by means of cutting or similar material removal processes. This manufacturing can be carried out simultaneously with the manufacturing of the surface of the spectacle lenses to which the annular focusing structures should be included.

[0170] Partial areas or all of one or more surfaces, including focusing and diffused structures, can be coated with corresponding functional coatings, such as hard coatings, anti-reflective coatings, cleaning coatings, anti-fog coatings, antistatic coatings, antibacterial coatings, antiviral coatings, etc.

[0171] In all exemplary embodiments, the innermost annular focusing structure is directly adjacent to the aperture, and when adjacent annular focusing structures are arranged at a distance from each other, the annular diffuser fills the entire area between adjacent annular focusing structures. No diffuser overlaps with the annular focusing structure.

[0172] Combining Figure 1 and Figure 2 A first exemplary embodiment of the spectacle lens design of the present invention is described. Figure 1 A plan view shows an eyeglass 1 with an eyeglass lens 2 manufactured according to a first exemplary embodiment of the eyeglass lens design according to the present invention. The eyeglass lens 2 can be considered representative of the eyeglass lens design of the first exemplary embodiment. Figure 2 One of the eyeglass lenses 2 is shown in a side view.

[0173] The eyeglasses 1 include two spectacle lenses 2, one for the wearer's right eye and one for the wearer's left eye. These two spectacle lenses 2 are mounted in an eyeglass frame 3 and separated by a bridge 7 of the frame 3. Each spectacle lens 2 includes an aperture 4 that forms a clear area for viewing objects. In this exemplary embodiment, the aperture 4 is circular in shape. The aperture 4 provides full correction for distance vision. This means that regardless of the distance of the object being viewed, the wearer can see clearly (with the aid of accommodation), i.e., a clear focus can be produced in the central region of the retina (fovea region). In this exemplary embodiment, the front surface 2a of the spectacle lens 12 is spherical.

[0174] like Figure 2 As shown, in the peripheral region 5 of the spectacle lens 2, five annular focusing structures 5a, 5b, 5c, 5d, and 5e are applied to the rear surface 2b of the spectacle lens 2. The application of the annular focusing structures 5a, 5b, 5c, 5d, and 5e can be accomplished by any of the manufacturing processes described above. In this exemplary embodiment, all five annular focusing structures 5a, 5b, 5c, 5d, and 5e have the same cross-section, which is a circular cross-section. There are continuous connections 6a, 6b, 6c, and 6d between adjacent annular focusing structures 5a, 5b; 5b, 5c; 5c, 5d; 5d, and 5e. Each continuous connection 6a, 6b, 6c, and 6d forms a linear scattering center and can therefore be considered as a linear diffuser.

[0175] Each of the annular focusing structures 5a, 5b, 5c, 5d, and 5e provides an annular focal line that, if the eye focuses on the surface of the retina at the center of the eye's optical axis, is peripherally myopicly defocused compared to the focal point in the central region of the retina.

[0176] Combining Figure 3 A second exemplary embodiment of the spectacle lens design of the present invention is described. Figure 3 A plan view shows an eyeglass 11 with an eyeglass lens 12 manufactured according to a second exemplary embodiment of the eyeglass lens design according to the present invention. The eyeglass lens 12 can be considered representative of the eyeglass lens design of the second exemplary embodiment.

[0177] The eyeglasses 11 include two lenses 12, one for the wearer's right eye and one for the wearer's left eye. These two lenses 12 are mounted in an eyeglass frame 13 and separated by a bridge 17 of the frame 13. Each lens 12 includes an aperture 14 that forms a clear area for viewing objects. In this exemplary embodiment, the aperture 14 is elliptical in shape and provides full correction for distance vision. This means that regardless of the distance of the object being viewed, the wearer can see clearly (with the aid of accommodation), i.e., a clear focus can be produced in the central region of the retina (fovea region). In this exemplary embodiment, the front surface of the lens 12 is spherical.

[0178] As in the first exemplary embodiment, five annular focusing structures 15a, 15b, 15c, 15d, and 15e are applied to the rear surface of the spectacle lens 12 in the peripheral region 15. However, unlike the annular focusing structures in the first exemplary embodiment, the five annular focusing structures 15a, 15b, 15c, 15d, and 15e in the second exemplary embodiment are elliptical in shape and have the same cross-section, which in this exemplary embodiment is a circular cross-section. Each spectacle lens 12 can be manufactured using any of the manufacturing processes described above.

[0179] All the annular focusing structures 15a, 15b, 15c, 15d, and 15e are connected in series to their respective inward and outward adjacent annular focusing structures 15a, 15b, 15c, 15d, and 15e. Each consecutive connection 16a, 16b, 16c, and 16d forms an annular scattering center and can therefore be regarded as an annular diffuser.

[0180] Each of the annular focusing structures 15a, 15b, 15c, 15d, and 15e provides an annular elliptical focal line that, if the eye focuses on the surface of the retina at the center of the eye's optical axis, is peripherally myopicly defocused compared to the focal point in the central region of the retina.

[0181] Combining Figure 4 and Figure 5 A third exemplary embodiment of the spectacle lens design of the present invention is described. Figure 4 A plan view shows an eyeglass 21 with an eyeglass lens 22 manufactured according to a third exemplary embodiment of the eyeglass lens design according to the present invention. The eyeglass lens 22 can be considered representative of the eyeglass lens design of the third exemplary embodiment. Figure 5 One of the eyeglass lenses 22 is shown in a side view.

[0182] The eyeglasses 21 include two lenses 22, one for the wearer's right eye and one for the wearer's left eye. These two lenses 22 are mounted in an eyeglass frame 23 and separated by a bridge 27 of the frame 23. Each lens 22 includes an aperture 24 that forms the clear area of ​​the lens 22. The aperture 24 in this exemplary embodiment is elliptical in shape and provides full correction for distance vision. This means that regardless of the distance of the object being viewed, the wearer can see clearly (with the aid of accommodation), i.e., a sharp focus can be produced in the central region of the retina (fovea region). The front surface 22a of the lens 22 is spherical.

[0183] In this exemplary embodiment, three annular focusing structures 25a, 25b, and 25c are applied to the rear surface 22b of the spectacle lens 22. The three annular focusing structures 25a, 25b, and 25c are elliptical in shape and are separated by two annular diffusers 26a and 26b, which have [missing information - likely referring to a specific feature or function]. Figure 5 The width is represented by "w".

[0184] Each spectacle lens 22 can be produced by casting. The annular diffusers 26a and 26b can be produced by means of a laser that produces multiple dot-shaped depressions, similar to those disclosed, for example, in WO 2010 / 075319 A2, WO 2918 / 026697 A1, WO 2019 / 152438 A1 and WO2020 / 014613 A1.

[0185] In this exemplary embodiment, all three annular focusing structures 25a, b, and 25c have the same cross-section, which is a circular cross-section. Each annular focusing structure 25a, 25b, and 25c provides an annular elliptical focal line that is peripherally myopicly defocused compared to the focal point in the central region of the retina if the eye focuses on the surface of the retina at the center of the eye's optical axis.

[0186] Next, we will combine Figure 6 An exemplary embodiment of the method of the present invention for providing a spectacle lens design for at least delaying the progression of myopia is described.

[0187] In the first step S1, data from a prescription is received, wherein the prescription includes a summary of the refractive power required to correct the diagnosed refractive error. In the case of myopia, the prescription includes at least a spherical power value "sph". Additionally, in the case of additional astigmatism, the prescription may also include a cylindrical power value "cyl" and a cylindrical axis value "axis". Other values ​​may also be present in the prescription, such as prism values ​​and corresponding base curve values. In the case of this invention, the prescription also includes an additional power value used to provide myopic defocus.

[0188] In this example, the values ​​included in the prescription are based on measurements performed on a person with refractive errors by an ophthalmologist, which provide refraction data relating to the person's eye. Refraction data can be objective refraction data—that is, refraction data measured objectively using a refractometer or similar instrument—or subjective refraction data. In the case of subjective refraction data, this data can be collected by having the person with refractive errors look at text or different sized targets while trying various test lenses until the person experiences satisfactory visual acuity.

[0189] However, instead of the prescribed value, measurement data can also be provided in the form of other suitable values ​​(e.g., Zernike coefficients). Alternatively, values ​​representing objective refraction data can be received directly from a refractometer or any other suitable measuring device.

[0190] Based on the measurement data received in step S1, the spectacle lens is designed to provide a focused image (with the aid of accommodation) on the fovea when the wearer looks through the spectacle lens worn according to the actual wearing position. In the case of myopia, the power will be negative, so that the focal point located in front of the fovea without correction will be shifted to the fovea. Therefore, correction for distance vision can be achieved.

[0191] In step S3, a focal power is determined that produces a focal point in front of the fovea. This focal power can be considered as an additional focal power added to the focal power determined in step S2. This additional focal power provides myopic defocus when added to the focal power determined in step S2. However, since myopic defocus should only exist in peripheral vision, in step S4, annular focusing structures are determined. These annular focusing structures will exist in the peripheral area of ​​the spectacle lens and surround the aperture, which has no focusing structures. Since the aperture does not have annular focusing structures, the aperture provides the focal power determined in step S2.

[0192] Determining the annular focusing structure in step S4 includes determining the width and diameter of the annular focusing structure and its cross-sectional shape. Furthermore, step S4 includes determining the number of focusing structures that will have at least two focusing structures and the distance between the focusing structures. (Already combined) Figures 1 to 5 Examples of suitable focusing structures are described.

[0193] The distance between the annular focusing structures can be determined to be zero, meaning that adjacent focusing structures are connected and adjacent to each other. In this case, the circular lines of the adjacent annular focusing structures are relatively sharp lines, which act as linear scattering centers and thus as linear diffusers.

[0194] In step S5, if the distance between adjacent annular focusing structures determined in step S4 is zero, the method immediately proceeds to step S6. In step S6, suitable data is generated that represents the spectacle lens design and allows the manufacture of spectacle lenses with the power determined in step S2, the additional power determined in step S3, and the annular focusing structures determined in step S4.

[0195] If the distance between adjacent annular focusing structures is greater than zero, step S5 initiates step S7, in which a scattering center suitable for the region between adjacent annular focusing structures is determined. For example, the scattering center can be in the form of a point or linear depression, which can be formed, for example, by a laser. By introducing the scattering center into the annular region between the two annular focusing structures, this annular region becomes a diffuser. Then, in step S6', data representing the spectacle lens design is generated, allowing the manufacture of spectacle lenses with the power determined in step S2, the additional power determined in step S3, the annular focusing structures determined in step S4, and the scattering center determined in step S7.

[0196] Next, we will combine Figure 8 An exemplary embodiment of a method for manufacturing spectacle lenses specified in the data generated in step S6 or step S6' is described.

[0197] In step S11, data generated in step S6 or S6' of the method for providing a spectacle lens design for at least delaying myopia progression is received. Then, in step S12, a single-vision spectacle lens is formed, providing the power determined in step S4 of the method for providing a spectacle lens design for at least delaying myopia progression. This single-vision lens can be manufactured, for example, from a semi-finished blank including a completed front surface. The rear surface of the semi-finished blank is then machined to make the semi-finished blank a single-vision spectacle lens with the desired power.

[0198] Next, in step S13, a mold is set on the rear surface of the single-vision spectacle lens. The molded surface of the mold represents the reverse shape of the annular focusing structure determined in step S4 of the method for providing a spectacle lens design for at least delaying the progression of myopia. The mold is set on the rear surface of the single-vision spectacle lens, and the annular focusing structure is then formed on the rear surface of the single-vision spectacle lens by injection molding or any other suitable molding process. After the molding process, a polishing process may be performed to remove any ridges remaining from the molding process. However, applying the annular focusing structure to the rear surface of the single-vision spectacle lens does not necessarily require a molding process. Other processes may also be used, such as swelling processes like oleic acid swelling or additive manufacturing processes like inkjet printing.

[0199] When the distance between the annular focusing structures formed on the rear surface of a single-vision spectacle is greater than zero, the scattering center determined in step S7 of the method for providing a spectacle lens design for at least delaying myopia progression is introduced into the annular region between adjacent annular focusing structures. This can be accomplished by any suitable method, such as by means of a laser that generates dot-shaped or linear recesses between adjacent annular focusing structures in the rear surface of the single-vision spectacle lens. The spectacle lens is completed by providing a diffuser in step S14.

[0200] Since the single-vision spectacle lens is formed first in the exemplary embodiment, this embodiment provides the opportunity to manufacture a reserve of single-vision lenses with different powers, to which the annular focusing structure is applied as needed. However, forming the single-vision spectacle lens first and then applying the annular focusing structure is not mandatory. The annular focusing structure can also be formed in step S12 when the rear surface of the spectacle lens is formed by means of a material removal process such as cutting. However, when the annular focusing structure is formed together with the rest of the rear surface of the single-vision spectacle lens by a material removal process, it is not feasible to apply the annular focusing structure to the reserve of the single-vision lens as needed.

[0201] Although the annular focusing structure provides an annular focal line in the exemplary embodiments shown so far, at least one annular focusing structure in an eyeglass lens design, and particularly each annular focusing structure in an eyeglass lens design, may also provide multiple point-like or short linear focal points located on an annular line surrounding the aperture. To achieve this, the annular focusing structure of the exemplary embodiments shown so far can be segmented into multiple adjacent small lenses, particularly circular or elliptical small lenses.

[0202] exist Figure 8A fourth exemplary embodiment is shown, wherein the annular focusing structures 35a, 35b are formed by a ring of small lenses 38, wherein the small lenses are adjacent to each other. Each of the small lenses 38 is spherical and provides a point-shaped focal point. The focal point provided by the small lenses 38 lies on the annular line. Although in this exemplary embodiment the small lenses 38 are spherical and provide a point-shaped focal point, the small lenses may also have other shapes that provide, for example, a short linear focal point.

[0203] Figure 8 A plan view shows an eyeglass 31 with an eyeglass lens 32 manufactured according to a fourth exemplary embodiment of the eyeglass lens design according to the present invention. The eyeglass lens 32 can be considered representative of the eyeglass lens design of the fourth exemplary embodiment.

[0204] The eyeglasses 31 include two spectacle lenses 32, one for the wearer's right eye and one for the wearer's left eye. These two spectacle lenses 32 are mounted in an eyeglass frame 33 and separated by a bridge 37 of the frame 33. Each spectacle lens 32 includes an aperture 34 that forms the clear area of ​​the spectacle lens 32. The aperture 34 in this exemplary embodiment is circular in shape and provides full correction for distance vision. This means that regardless of the distance of the object being viewed, the wearer can see clearly (with the aid of accommodation), i.e., a sharp focus can be produced in the central region of the retina (fovea region). The front surface of the spectacle lens 32 is spherical.

[0205] In this exemplary embodiment, two annular focusing structures 35a and 35b are applied to the rear surface of the spectacle lens 32. The two annular focusing structures 35a and 35b are separated and isolated by an annular diffuser 36a.

[0206] Each spectacle lens 32 can be manufactured by casting. The annular diffuser 36 can be manufactured by means of a laser that produces a plurality of dot-shaped depressions, which are similar to, for example, the depressions disclosed in WO 2010 / 075319 A2, WO 2918 / 026697 A1, WO 2019 / 152438 A1 and WO 2020 / 014613 A1.

[0207] although Figure 8 The focusing structures 35a and 35b shown are formed by a ring of small lenses positioned at intervals between each other. However, it is not mandatory whether the ring focusing structures 35a and 35b are positioned at intervals between each other, or whether both ring focusing structures 36a and b are formed by a ring of small lenses. For example, as Figure 9 and Figure 10 As shown, the annular focusing structures 35a and 35b can be positioned so close together that they can contact each other. Furthermore, as... Figure 10 and Figure 11As shown, one annular focusing structure 35b can provide multiple focal points located on the annular line, while another annular focusing structure 35a provides an annular focal line. In any case, the space between the annular focusing structures 35a and 35b is filled by the diffuser 36.

[0208] The concept of the present invention has been described with reference to exemplary embodiments thereof to illustrate the invention. However, those skilled in the art will recognize that the concept of the invention can be implemented by variations of the exemplary embodiments. For example, the shape, number, and cross-section of the annular focusing structure may differ from those described in the exemplary embodiments. Furthermore, those skilled in the art can envision other manufacturing techniques to provide the annular focusing structure. For example, instead of forming the annular focusing structure on the front or rear surface of the spectacle lens, an annular region with a refractive index different from that of the rest of the spectacle lens may be provided in the spectacle lens to provide the annular focusing structure. Thus, the annular focusing structure will exist within the spectacle lens, rather than on the surface of the spectacle lens. Therefore, the invention should not be limited to the exemplary embodiments, but only to the appended claims.

Claims

1. An ophthalmic spectacle lens comprising: - an aperture, the aperture having a dioptric power, and - at least two annular focusing structures surrounding the aperture, the annular focusing structures providing an additional power relative to the dioptric power provided by the aperture, the additional power being at least 0.5 dpt, - wherein at least one of the at least two annular focusing structures consists of a set of mini-lenses abutting each other to form a ring of mini-lenses and providing a plurality of foci along an annular line, and - wherein adjacent annular focusing structures are spaced apart from each other, characterized in that - at least one annular focusing structure provides an annular focal line, - an annular diffuser is arranged between and contiguously abutting the adjacent annular focusing structures, one of the adjacent annular focusing structures consisting of a set of mini-lenses abutting each other to form a ring of mini-lenses and providing a plurality of foci along an annular line, while the other of the adjacent annular focusing structures provides an annular focal line.

2. An ophthalmic spectacle lens comprising: - an aperture, the aperture having a dioptric power, and - at least two annular focusing structures surrounding the aperture, the at least two annular focusing structures providing an additional power relative to the dioptric power provided by the aperture, the additional power being at least 0.5 dpt, - wherein, the innermost annular focusing structure directly abutting the aperture; and - wherein an annular diffuser is arranged between adjacent annular focusing structures, characterized in that the annular diffuser fills the area between the adjacent annular focusing structures.

3. An ophthalmic spectacle lens comprising: - an aperture, the aperture having a dioptric power, and - at least two annular focusing structures surrounding the aperture, the at least two annular focusing structures providing an additional power relative to the dioptric power provided by the aperture, the additional power being at least 0.5 dpt, wherein the annular focusing structures each provide an annular focal line, - wherein an annular diffuser is arranged between adjacent annular focusing structures, characterized in that the adjacent annular focusing structures abut each other by an annular line of contact therebetween, the annular line of contact forming the annular diffuser.

4. The spectacle lens according to claim 1, claim 2 or claim 3, characterized in that, The annular focusing structures are present on a back surface of the ophthalmic spectacle lens.

5. A set of ophthalmic spectacle lenses comprising an ophthalmic spectacle lens according to any one of claims 1 to 4, and instructions, the instructions comprising a real wearing position of the ophthalmic spectacle lens.

6. A computer readable storage medium having stored thereon a data set, the data set comprising at least one of the following types of data: (i) a representation of an ophthalmic spectacle lens according to any one of claims 1 to 4, the representation of the ophthalmic spectacle lens being configured for manufacturing the ophthalmic spectacle lens, and (ii) data comprising computer readable instructions for controlling one or more manufacturing machines in order to produce an ophthalmic spectacle lens according to any one of claims 1 to 4.

7. A computer-readable storage medium having stored thereon a data set comprising at least one of the following types of data: (i) a representation of an ophthalmic lens kit according to claim 5, wherein, The representation of the spectacle lens is configured for manufacturing the spectacle lens, and (ii) a representation of the spectacle lens kit according to claim 5 and data containing computer readable instructions for controlling one or more manufacturing machines in order to produce the spectacle lens.

8. A computer-implemented method of providing a spectacle lens design for manufacturing the spectacle lens using the design, the spectacle lens design being for at least slowing down myopia progression, the method comprising the steps of: - determining a spectacle lens having a refractive power, - determining at least two annular focusing structures to be positioned on the spectacle lens so as to surround an aperture providing the refractive power, wherein the annular focusing structures provide an additional power with respect to said refractive power, the additional power being at least 0.5 dpt, - determining at least one of the annular focusing structures to consist of lenslets (38) abutting each other to form a ring of lenslets and to provide a plurality of foci along an annular line, and - determining the at least two adjacent annular focusing structures to be positioned spaced apart from each other, characterized in that - determining the at least one annular focusing structure so that the at least one annular focusing structure provides an annular focal line, - determining an annular diffuser to be positioned between the adjacent annular focusing structures and contiguously abutting the adjacent annular focusing structures, one of the adjacent annular focusing structures consisting of lenslets abutting each other to form a ring of lenslets and providing a plurality of foci along an annular line, and the other of the adjacent annular focusing structures providing an annular focal line.

9. A computer-implemented method of providing a spectacle lens design for manufacturing the spectacle lens using the design, the spectacle lens design being for at least slowing down myopia progression, the method comprising the steps of: - determining a spectacle lens having a refractive power, and - determining at least two annular focusing structures to be positioned on the spectacle lens so as to surround an aperture providing the refractive power, wherein the annular focusing structures provide an additional power with respect to said refractive power, the additional power being at least 0.5 dpt, - determining an innermost annular focusing structure so that the innermost annular focusing structure directly abuts the aperture; and - determining the at least two annular focusing structures to be positioned with an annular diffuser arranged therebetween, characterized in that - determining the annular diffuser so that the annular diffuser fills the area between the annular focusing structures.

10. The computer-implemented method of any one of claims 8 to 9, wherein, The spectacle lens having a refractive power is determined based on measured eye data and the at least two annular focusing structures are determined.

11. A computer-implemented method of providing a spectacle lens design for manufacturing the spectacle lens using the design, the spectacle lens design being for at least slowing down myopia progression, the method comprising the steps of: - determining a spectacle lens having a refractive power, and - determining at least two annular focusing structures to be positioned on the spectacle lens so as to surround an aperture providing the refractive power, wherein the annular focusing structures provide an additional power with respect to said refractive power, the additional power being at least 0.5 dpt, wherein the annular focusing structures each provide an annular focal line, - at least two annular focusing structures are determined to be positioned with the annular diffuser arranged therebetween, characterized in that at least two of these annular focusing structures are determined such that adjacent annular focusing structures abut each other by an annular contact line therebetween, the annular contact line forming the annular diffuser.

12. The computer-implemented method of claim 8, claim 9, or claim 11, wherein, these annular focusing structures are determined to allow these annular focusing structures to be formed on a back surface of the spectacle lens.

13. The computer-implemented method of claim 8, claim 9 or claim 11, further configured for manufacturing the spectacle lens based on the design of claim 8, claim 9 or claim 11.

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