Optical lens intended to be worn by wearer

Abstract

An optical lens intended to be worn by a wearer, the optical lens comprising:-a dioptric region having a refractive power based on a prescription of the wearer; a plurality of optical elements, each optical element having a transparent optical function that does not focus an image on the retina of the wearer's eye when the optical lens is worn under standard wearing conditions, in which 60 DEG specular glossiness on the central region of the optical lens, e.g. At the optical center, and on the peripheral region of the optical lens is similar.

Description

Technical Field

[0001] The present disclosure relates to an optical lens intended to be worn by a wearer, the optical lens comprising a refractive zone having a refractive power based on a prescription of the wearer's eye and a plurality of optical elements, each optical element having a transparent optical function of not focusing an image on the retina of the wearer's eye when the optical lens is worn under standard wearing conditions. Background Art

[0002] Myopia is characterized by the eye focusing distant objects in front of its retina. Myopia is usually corrected using concave lenses, and hyperopia is usually corrected using convex lenses.

[0003] Myopia (also known as nearsightedness) has become a major public health problem worldwide. Accordingly, great efforts have been made to develop solutions aimed at slowing the progression of myopia.

[0004] Most of the current management strategies for myopia progression involve using optical defocus to act on peripheral vision. This approach has gained significant interest since studies in chicks and primates have shown that foveal refractive error can be manipulated by peripheral optical defocus without involving the intact fovea. Several methods and products are used to slow myopia progression by introducing this peripheral optical defocus. Among these solutions, orthokeratology contact lenses, bifocal soft and progressive contact lenses, circular progressive ophthalmic lenses, and lenses with lenslet arrays have been shown to be more or less effective through randomized controlled trials.

[0005] Myopia control solutions with lenslet arrays have been proposed, in particular by the applicant. The purpose of such lenslet arrays is to provide an optically blurred image in front of the retina, thereby triggering a stop signal to eye growth while achieving good vision.

[0006] Most research focuses on configuring myopia control solutions to provide optimal myopia control. However, most myopia control solutions will be used by children or adolescents who may be greatly affected by the aesthetic aspects of the myopia control solution. In order for such myopia control solutions to work optimally, the wearer should wear the optical lenses for as long as possible during the day.

[0007] Therefore, there is a need to provide optical lenses comprising optical elements each having a transparent optical function of not focusing an image on the wearer's retina, wherein these optical elements are as unnoticeable as possible to increase the acceptance of the solution, in particular among children and adolescents. Summary of the invention

[0008] To this end, the present disclosure proposes an optical lens intended to be worn by a wearer, the optical lens comprising:

[0009] - a refractive zone having a refractive power based on the wearer's prescription;

[0010] - a plurality of optical elements, each optical element having a transparent optical function of not focusing an image on the retina of the wearer's eye when the optical lens is worn under standard wearing conditions,

[0011] Therein, the 60° specular gloss on the central area of ​​the optical lens (eg at the optical center) and on the peripheral area of ​​the optical lens (eg at the periphery) are similar.

[0012] Advantageously, having similar 60° specular gloss on a central zone (e.g., at the optical center) and on a peripheral zone (e.g., at the periphery) of the optical lens improves the aesthetic aspects of the optical lens. In particular, having similar 60° specular gloss on a central zone (e.g., at the optical center) and on a peripheral zone (e.g., at the periphery) of the optical lens makes the optical lens look similar to a typical single vision optical lens from an observer's perspective, even though the optical lens includes multiple optical elements.

[0013] Indeed, in human vision, contrast detection at the retina is of great importance. Gloss is one of the visual appearance properties and therefore one of the important input stimuli that determines the overall visual appearance. This means that a measurable gloss gradient on the lens surface improves the visibility of optical elements (e.g. microlenses) to the observer.

[0014] The inventors have determined that the more uniform an optical lens is, the more aesthetically pleasing it is judged to be by observers.In the ophthalmic lens industry, single vision optical lenses are a prominent example of non-visually uniform lenses that are not well tolerated by wearers.

[0015] The 60° specular gloss on the central zone of the optical lens (eg, at the optical center) and on the peripheral zone of the optical lens (eg, at the periphery) is measured using the same gloss meter. Therefore, inter-instrument reproducibility is not considered in this disclosure.

[0016] According to further embodiments which may be considered alone or in combination:

[0017] - the overlap of the gloss measured on a central zone of the lens (eg the optical centre) and on a peripheral zone (eg at the periphery) corresponds to similar values; and / or

[0018] - overlap of the standard deviations of the 60° specular gloss measured on a central zone of the optical lens (e.g. at the optical centre) and on a peripheral zone of the optical lens (e.g. at the periphery); and / or

[0019] - an average distinctness of image gloss (DOI) measured on a central zone of the optical lens (e.g. at the optical center) and on a peripheral zone of the optical lens (e.g. at the periphery) of greater than or equal to 10 DOI index; and / or

[0020] - at least a portion of one of the front surface and the back surface of the optical lens comprises at least one layer of at least one coating element covering at least a portion of the surface on which the optical element is placed; and / or

[0021] - at least 50%, for example at least 80%, for example all of the optical elements are located on one of the surfaces of the optical lens, for example the front surface of the optical lens; and / or

[0022] - at least 50%, for example at least 80%, for example all of the optical elements are located between the front surface and the back surface of the optical lens; and / or

[0023] - at least 50%, such as at least 80%, such as all of the optical elements are refractive lenslets; and / or

[0024] - at least 50%, such as at least 80%, such as all of the optical elements are positioned along at least 5 concentric rings, and wherein the concentric rings do not adjoin each other; and / or

[0025] - the difference in standard deviation of the 60° specular gloss measured on a central zone of the optical lens (e.g. at the optical center) and on a peripheral zone of the optical lens (e.g. at the periphery) is less than or equal to 2 GU; and / or

[0026] - overlap of standard deviations of Distinction of Image (DOI) measured on a central zone of an optical lens (e.g. at the optical center) and on a peripheral zone of the optical lens (e.g. at the periphery); and / or

[0027] - at least 50%, for example at least 80%, for example all of the optical elements are positioned on a structured mesh, which is a square mesh or a honeycomb mesh or a triangular mesh or an octagonal mesh; and / or

[0028] - the difference in standard deviation of the 60° specular gloss measured on a central zone of the optical lens (e.g. at the optical center) and on a peripheral zone of the optical lens (e.g. at the periphery) is greater than or equal to 5 GU; and / or

[0029] - the standard deviation of the 60° specular gloss measured on the peripheral zone of the optical lens (e.g. at the periphery) is less than or equal to 2 GU; and / or

[0030] - the standard deviations of the Distinction of Image (DOI) measured on a central zone of the optical lens (e.g. at the optical center) and on a peripheral zone of the optical lens (e.g. at the periphery) do not overlap; and / or

[0031] - the standard deviation of the Distinction of Image (DOI) measured on the peripheral zone of the optical lens (e.g. at the periphery) is less than or equal to 2 DOI Index; and / or

[0032] - the refractive area is formed as an area other than the area formed as the plurality of optical elements; and / or

[0033] - The area of ​​each optical element is greater than or equal to 0.4mm 2 And less than or equal to 5mm 2 , for example, less than or equal to 4 mm 2 ; and / or

[0034] - the ratio of the total area of ​​the optical elements relative to the total area of ​​the surface of the optical lens is greater than or equal to 20% and less than or equal to 80%; and / or

[0035] - at least 50%, for example 80%, for example all of the optical elements are multifocal lenslets; and / or

[0036] - at least 50%, for example 80%, for example all of the optical elements are diffractive lenslets; and / or

[0037] - the diffractive lenslets are contiguous diffractive lenslets; and / or

[0038] - at least 50%, such as at least 80%, such as all of the optical elements are diffusing lenslets; and / or

[0039] - at least 50%, such as at least 80%, such as all of the optical elements are located on the back surface of the lens element; and / or

[0040] - for each circular zone having a radius between 2 mm and 4 mm, including a geometric centre located at a distance greater than or equal to said radius + 5 mm from the frame reference facing the pupil of the user looking straight ahead in standard wearing conditions, the ratio between the sum of the areas of the parts of the optical element located within said circular zone and the area of ​​said circular zone is between 20% and 70%; and / or

[0041] - the optical lens further comprises at least four optical elements, which are organized into at least two groups of adjacent optical elements; and / or

[0042] - organizing each group of adjacent optical elements into at least two concentric rings having the same center, the concentric rings of each group of adjacent optical elements being defined by an inner diameter corresponding to the smallest circle tangent to at least one optical element in the group and an outer diameter corresponding to the largest circle tangent to at least one optical element in the group; and / or

[0043] - at least some, for example all, of the concentric rings of optical elements are centred on the optical centre of the surface of the lens element on which said optical element is arranged; and / or

[0044] - the optical element concentric rings have a diameter between 9.0 mm and 60 mm; and / or

[0045] - the distance between two consecutive concentric rings of the optical element is greater than or equal to 0.5 mm, the distance between two consecutive concentric rings being defined by the difference between the outer diameter of a first concentric ring and the inner diameter of a second concentric ring, the second concentric ring being closer to the periphery of the optical lens; and / or

[0046] - the plurality of optical elements further comprises an optical element positioned radially between two concentric rings; and / or

[0047] - the mesh structure is a random mesh, such as a Voronoid mesh; and / or

[0048] - at least 50%, such as at least 80%, such as all of the optical elements have a constant optical power and a discontinuous first derivative between two adjacent optical elements; and / or

[0049] - at least 50%, such as at least 80%, such as all of the optical elements have a varying optical power and a continuous first derivative between two adjacent optical elements; and / or

[0050] - the optical element is configured such that along at least one section of the lens element (e.g. a section passing through the optical center of the optical lens), the average spherical refractive index of the optical element increases from a certain point of said section (e.g. the optical center of the optical lens) towards said peripheral portion of the optical lens; and / or

[0051] - the optical element is configured such that along at least one section of the optical lens, the cylindrical power of the optical element increases from a certain point of said section (e.g. the optical center of the optical lens) towards said peripheral portion of the optical lens; and / or

[0052] - the optical element is configured such that along at least one section of the optical lens, the average sphere and / or cylinder of the optical element increases from the center of said section towards a peripheral portion of said section; and / or

[0053] - the refractive zone comprises an optical centre, and the optical element is configured such that along at least 20%, such as at least 50%, such as at least 80%, such as all segments passing through the optical centre of the lens, the average spherical and / or cylindrical power of the optical element increases from the optical centre towards a peripheral portion of the lens; and / or

[0054] - the refractive zone includes a distance reference point, a near reference point, and a meridian connecting the distance reference point and the near reference point, and the optical element is configured so that along any horizontal segment of the lens under standard wearing conditions, the average sphere and / or cylinder of the optical element increases from the intersection of the horizontal segment with the meridian towards the peripheral portion of the optical lens; and / or

[0055] - the average spherical and / or cylindrical power increase function along a segment is different depending on the position of said segment along the meridian; and / or

[0056] - the average spherical and / or cylindrical power increase function along the segment is asymmetric; and / or

[0057] - the optical element is configured such that, in standard wearing conditions, the at least one segment is a horizontal segment; and / or

[0058] - the average spherical and / or cylindrical power of the optical element increases from a first point of the segment towards a peripheral portion of the segment and decreases from a second point of the segment towards the peripheral portion of the segment, the second point being closer to the peripheral portion of the segment than the first point; and / or

[0059] - the average spherical and / or cylindrical power increase function along the at least one section is a Gaussian function; and / or

[0060] - the average spherical and / or cylindrical power increase function along the at least one section is a quadratic function; and / or

[0061] - the optical elements are arranged so that the average focus of light rays passing through each optical element is at the same distance from the retina; and / or

[0062] At least one, for example all, of the optical elements are toric refractive lenslets. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Non-limiting embodiments of the present disclosure will now be described with reference to the accompanying drawings, in which:

[0064] ○ Figure 1 shows a front view of a lens element according to a first embodiment of the present disclosure;

[0065] ○ Figure 2 shows a profile diagram of a lens element according to an embodiment of the present disclosure;

[0066] ○ Figure 3 shows a front view of a lens element according to a second embodiment of the present disclosure;

[0067] ○ Figure 4 The astigmatism axis γ of the lens in the TABO convention is shown;

[0068] ○ Figure 5 The cylindrical axis γAX in the convention used to characterize aspheric surfaces is shown;

[0069] ○ Figure 6 Demonstrates measurement modes that can be performed to measure 60° specular gloss and image gloss clarity;

[0070] ○ Figure 7 Providing the measurement results of the 60° specular gloss at the center and the periphery of two different optical lenses according to the present disclosure; and

[0071] ○ Figure 8 Measurements of image gloss clarity at the center and periphery of two different optical lenses according to the present disclosure are provided.

[0072] The elements in the figures are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size of some elements in the figures may be enlarged relative to other elements to help improve the understanding of the embodiments of the present disclosure. DETAILED DESCRIPTION

[0073] The present disclosure relates to a lens element intended to be worn by a wearer.

[0074] In the rest of this specification, terms such as "upper", "bottom", "horizontal", "vertical", "above", "below", "front", "back", etc., or other words indicating relative positions may be used. These terms should be understood in the wearing conditions of the lens element.

[0075] In the context of the present disclosure, the term "optical lens" may refer to an uncut optical lens or an eyeglass optical lens or an ophthalmic lens that is edged to fit a specific eyeglass frame and an optical device suitable for positioning on an ophthalmic lens. In the context of the present disclosure, an "optical lens" may have a coating, such as a hard coating.

[0076] According to some embodiments, the optical lens is a contact lens intended to be worn on the eye of a wearer.

[0077] like Figures 1 to 3 As shown, an optical lens 10 according to the present disclosure includes a refraction zone 12 and a plurality of optical elements 14 .

[0078] like Figure 2As shown, the optical lens includes at least a first surface and a second surface opposite to the second surface. For example, the first surface may include an object-side surface F1 formed as a convex surface toward the object side, and the second surface may include an eye-side surface F2 formed as a concave surface having a curvature different from the curvature of the object-side surface. The lens element 10 may be made of an organic material, a thermosetting or thermoplastic material (e.g., polycarbonate), or a mineral material such as glass.

[0079] The refractive zone 12 has a refractive power Px based on a prescription of the wearer's eye (eg, a prescription for a person for whom the optical lens is intended). The prescription is, for example, suitable for correcting abnormal refraction of the eye of the wearer of the optical lens.

[0080] The term "prescription" is understood to mean a set of optical characteristics of power, astigmatism, prismatic deviation, which are determined by an ophthalmologist or optometrist in order to correct the visual defects of the eye, for example with the aid of a lens positioned in front of the eye of the wearer. For example, a prescription for myopia comprises a power value and an astigmatism value with an axis for far vision.

[0081] The prescription may include an indication that the wearer's eye has no defects and will not provide optical power to the wearer. In this case, the refractive zone is configured to not provide any optical power.

[0082] The refraction area is preferably formed as an area other than the area formed by the plurality of optical elements. In other words, the refraction area is an area complementary to the area formed by the plurality of optical elements.

[0083] like Figure 1 and Figure 3 As shown, the refractive zone 12 may include at least a central area of ​​the optical lens 10 .

[0084] The central region may have a characteristic dimension greater than 4 mm and less than 22 mm, for example less than 20 mm.

[0085] The central area may be centered about a reference point of the optical lens 10. The reference point (about which the central area may be centered) is the geometric center of the optical lens and / or one of an optical and / or near vision reference point and / or a far vision reference point.

[0086] Preferably, the central region is centered on or at least includes a frame reference point that faces the pupil of a wearer looking straight ahead under standard wearing conditions.

[0087] The wearing condition is understood as the position of the optical lens relative to the wearer's eye, as defined by the anteversion angle, cornea to lens distance, pupil to cornea distance, center of rotation of the eye (CRE) to pupil distance, CRE to lens distance, and wrap angle.

[0088] The cornea-to-lens distance is the distance between the cornea and the posterior surface of the lens along the visual axis (usually considered to be horizontal) of the eye in primary position; for example, equal to 12 mm.

[0089] The pupil-to-corneal distance is the distance between the pupil and the cornea of ​​the eye along its visual axis; it is usually equal to 2 mm.

[0090] The CRE-to-pupillary distance is the distance along the visual axis of the eye between its center of rotation (CRE) and the cornea; for example, it is equal to 11.5 mm.

[0091] The CRE-to-lens distance is the distance between the CRE of the eye and the posterior surface of the lens along the visual axis of the eye in the primary eye position (generally considered to be horizontal), for example equal to 25.5 mm.

[0092] The anteversion angle is the angle in the vertical plane between the normal to the back surface of the lens and the visual axis of the eye in the first eye position, at the intersection between the back surface of the lens and the visual axis of the eye in the first eye position (usually considered to be horizontal); for example, equal to -8°, preferably equal to 0°.

[0093] The wrap angle is the angle in the horizontal plane between the normal to the back surface of the lens and the visual axis of the eye in the first eye position (usually considered to be horizontal) at the intersection between the back surface of the lens and the visual axis of the eye in the first eye position, for example equal to 0°.

[0094] An example of a standard wearing condition may be defined by an anteversion angle of -8°, a cornea-to-lens distance of 12 mm, a pupil-to-cornea distance of 2 mm, a CRE-to-pupil distance of 11.5 mm, a CRE-to-lens distance of 25.5 mm, and a wrap angle of 0°.

[0095] Another example of a standard wearing condition that is more suitable for younger wearers may be defined by an anteversion angle of 0°, a cornea-to-lens distance of 12 mm, a pupil-to-cornea distance of 2 mm, a CRE-to-pupil distance of 11.5 mm, a CRE-to-lens distance of 25.5 mm, and a wrap angle of 0°.

[0096] An example of a standard wearing condition for a contact lens may be defined by an anteversion angle of 0°, a cornea-to-lens distance of 0 mm, a pupil-to-cornea distance of 2 mm, a CRE-to-pupil distance of 11.5 mm, a CRE-to-lens distance of 13.5 mm, and a wrap angle of 0°.

[0097] The central area of ​​the optical lens may include the optical center of the optical lens and have a characteristic size greater than 4 mm (corresponding to a peripheral angle of + / -8° on the retinal side) and less than 22 mm (corresponding to a peripheral angle of + / -44° on the retinal side), for example less than 20 mm (corresponding to a peripheral angle of + / -40° on the retinal side). The characteristic size may be a diameter or a major axis or a minor axis of the elliptical central area.

[0098] The refractive zone 12 may further comprise at least a second refractive power Pp different from the prescribed refractive power Px. In the sense of the present disclosure, two refractive powers are considered to be different when the difference between them is greater than or equal to 0.25D, for example greater than 0.5D.

[0099] When the prescription refractive power Px is determined to compensate for myopia of the wearer's eye, the second refractive power Pp may be greater than the refractive power Px.

[0100] When the prescription refractive power Px is determined to compensate for the presbyopia of the wearer's eye, the second refractive power Pp may be smaller than the refractive power Px.

[0101] The refractive zone 12 may comprise a continuous variation of the refractive power. For example, the refractive zone may have a progressive multifocal design. The optical design of the refractive zone may comprise a fitting cross at which the optical power is negative and a first zone extending on the temporal side of the refractive power when the wearer wears the lens element. In the first zone, the optical power increases when moving towards the temporal side, and on the nasal side of the lens, the optical power of the ophthalmic lens is substantially the same as at the fitting cross. Such an optical design is disclosed in more detail in WO 2016 / 107919.

[0102] Alternatively, the refractive power in the refractive zone 12 may include at least one discontinuity.

[0103] like Figures 1 to 3 As shown, the optical lens 10 includes a plurality of optical elements.

[0104] At least 50%, for example at least 80%, for example all of the surface of the optical element 10 may be covered by at least one layer of the coating element. The at least one layer of the coating element may include features selected from the group consisting of anti-scratch, anti-reflection, anti-fouling, anti-dust, UV30 filtering, blue light filtering, anti-wear features.

[0105] Any known technique may be used to provide the layer of the coating element. For example, a dip coating process may be used to provide the layer of the coating, in which the optical lens receives one layer of the coating on each surface at the same time.

[0106] The optical element has a transparent optical function that does not focus an image on the retina of the wearer's eye when the optical lens is worn under standard wearing conditions.

[0107] In other words, when the wearer wears the lens element, for example, under standard wearing conditions, light rays passing through the plurality of optical elements will not be focused on the retina of the wearer's eye, particularly in the peripheral portion of the wearer's retina. For example, the optical elements may be focused in front of and / or behind the retina of the wearer's eye.

[0108] Advantageously, not focusing the image on the wearer's retina allows for the generation of a control signal that inhibits, reduces or at least slows the progression of a refractive error, such as myopia or hyperopia, in the eye of a person wearing the lens element.

[0109] In the sense of the present disclosure, an optical element is considered to have a transparent optical function when it absorbs less than 50%, such as less than 80%, such as less than 95% of the light over the visible spectrum (ie 380 nm to 750 nm).

[0110] The inventors have observed that in order for myopia control optical lenses to have a high acceptance among children and adolescents, the aesthetic aspects of the optical lenses are of great importance.

[0111] Specifically, the inventors have found that myopia control optical lenses having similar 60° mirror gloss on the central zone of the optical lens (e.g., at the optical center) and on the peripheral zone of the optical lens (e.g., at the periphery) increase the acceptance of myopia control lenses by children and adolescents, and particularly increase the time that such myopia control lenses are used during the day.

[0112] Several studies have described factors associated with spectacle-wear compliance in school-aged Mexican children and have found that the appearance of spectacles can be attractive or derided by school-aged children, such as Castanon Holguin AM, Congdon N, Patel N, Ratcliffe A, Esteso P, Toledo Flores S, Gilbert D, Pereyra Rito MA, Munoz B. Factors associated with spectacle-wear compliance in school-aged Mexican children. Invest Ophthalmol Vis Sci. 2006 Mar; 47(3): 925-8. doi:10.1167 / iovs.05-0895-PMID:16505025 [Factors associated with spectacle compliance among Mexican school-age children, Investigative Ophthalmology and Visual Science, 2006 Mar; 47(3): 925-8. doi:10.1167 / iovs.05-0895-PMID:16505025], or von-Bischhoffshausen FB, Riquelme A. Spectacle-wear compliance in school children in Silva JC. Chile. Ophthalmic Epidemiol. 2014 Dec;21(6):362-9.doi:10.3109 / 09286586.2014.975823.Epub 2014 Oct 30 - PMID:25356984.

[0113] Visual gloss is a second-order property of visual appearance. Visual gloss was redefined by the International Commission on Illumination (CIE) in 2006 as an appearance mode by which the specular highlights of an object are perceived as superimposed on a surface due to the directionally selective properties of the surface (International Lighting Vocabulary (e-ILV) definition 17-24-080).

[0114] Visual gloss is a complex construct of the visual system, which is now described as a "gestalt", i.e., a multidimensional psychophysical quantity.

[0115] To define the dimensions of gloss, RS Hunter described gloss categories in the 1920s, including specular gloss.

[0116] Specular gloss measurement is a technique developed to solve industry problems related to the visual aspects of automotive hard coatings at the time. Gloss meters are widely used in the paint and automotive industries. It is described by two main standards: ISO 2813:2014 and ASTM D523.

[0117] The quantity measured is the gloss index, expressed in gloss units (GU). The gloss index is the flux ratio between the sample to be measured and a glass standard at fixed illumination and detection apertures. The standards provided with the measuring instrument have specific geometry and refractive index and are traceable to national metrology institutes. The standards are measured in three fixed geometries for illumination and detection: 20°:20°, 60°:60°, and 85°:85°.

[0118] A common approach is to use a 60° configuration to first assess the sample reflectance properties, and make other measurements accordingly, the more matte, the greater the glancing angle of the illumination.

[0119] The inventors used a gloss meter designed for small apertures to stay within the range of ISO 2813:2014.

[0120] The inventors also chose to use a Distinction of Image (DOI) measurement. DOI is a quantity derived from specular gloss, calculated by a gloss meter as the change in reflectivity over a given range of angles:

[0121]

[0122] DOI is also standardized in ASTM D5767-18

[0123] In order to comply with the domain method, the inventors chose to use a gloss meter with a reduced detection size to limit the lens curvature effect to a minimum.

[0124] In order to accurately measure 60° specular gloss and image gloss clarity (DOI), it may be necessary to prepare the optical lens, especially the surface of the optical lens that does not carry optical elements. For example, the back surface of the optical lens is ground and then painted with black matte paint.

[0125] To compare the 60° specular gloss and the distinctness of image (DOI) between the central and peripheral areas of an optical lens, the following can be used: Figure 6 The modes shown perform the measurements.

[0126] The skilled person will appreciate that other modes or types of measurements may be performed and that the measurements may be adjusted according to the circumstances.

[0127] The inventors have found that the mean and standard deviation of the measurements appear to be the most interesting features in relation to the acceptance of myopia control optical lenses, particularly by younger wearers.

[0128] The standard deviation will be calculated over different zones of the optical lens defined by the center and the periphery of the lens. The point of this disclosure is to measure the relative variation of the standard deviation caused by the refractive zones and optical elements, rather than the absolute value of the Distinction of Image (DOI) which may be greatly affected by the curvature.

[0129] Figure 7 Demonstrated in accordance with Figure 1 The optical lens L1 is configured according to Figure 3 60° specular gloss measurement performed on a central area of ​​the configured optical lens L2 (e.g., at the optical center) and on a peripheral area of ​​the optical lens (e.g., at the periphery).

[0130] An optical lens according to the present disclosure has similar 60° specular gloss on a central zone of the optical lens (eg, at the optical center) and on a peripheral zone of the optical lens (eg, at the periphery).

[0131] Typically, 60° specular gloss is measured on a central area that includes the optical center of the optical lens and has a characteristic size (e.g., diameter) greater than or equal to 0.4 mm (e.g., greater than or equal to 0.5 mm) and less than or equal to 0.9 mm (e.g., less than or equal to 0.75 mm).

[0132] Typically, 60° specular gloss is measured on a peripheral zone of an optical lens having an annular shape centered on the optical center of the optical lens and having an inner diameter greater than or equal to 30 mm and less than or equal to 40 mm and an outer diameter greater than or equal to 55 mm and less than or equal to 70 mm (for example less than or equal to 60 mm).

[0133] 60° specular gloss can be measured on a peripheral zone of the optical lens, which is located slightly more than half the instrument aperture (e.g., 1.1 times half the instrument aperture) from the center of the optical center. Advantageously, this ensures that the peripheral zone measurement and the central zone measurement do not overlap.

[0134] Alternatively, 60° specular gloss may be measured on a peripheral zone of the optical lens positioned midway along the radius of the lens.

[0135] 60° specular gloss is measured in gloss units (GU).

[0136] like Figure 7As shown above, according to an embodiment, the standard deviations of the 60° specular gloss measured on a central zone of an optical lens (e.g., at the optical center) and on a peripheral zone of the optical lens (e.g., at the periphery) overlap.

[0137] Figure 8 Demonstrated in accordance with Figure 1 The optical lens L1 is configured according to Figure 3 Image gloss clarity (DOI) measurements are performed on a central area of ​​the optical lens L2 of the configuration (e.g., at the optical center) and on a peripheral area of ​​the optical lens (e.g., at the periphery).

[0138] The optical lens according to the present disclosure may have an average image gloss clarity (DOI) measured on a central zone of the optical lens (e.g., at the optical center) and on a peripheral zone of the optical lens (e.g., at the periphery) greater than or equal to 10 DOI index.

[0139] According to an embodiment of the present disclosure, at least 50%, for example at least 80%, for example all of the optical elements are refractive lenslets (for example aspherical lenslets), and the absolute value of the cylindrical power of at least 50%, for example at least 80%, for example all of the optical elements of the optical lens is greater than or equal to 0.1D, for example greater than or equal to 0.2D.

[0140] As is known, the minimum curvature CURV at any point on an aspherical surface is min It can be defined by the following formula: Among them, R max is the local maximum radius of curvature, expressed in meters, and CURV min Expressed in diopters.

[0141] Similarly, the maximum curvature CURV at any point on an aspherical surface max It can be defined by the following formula: Among them, R min is the local minimum radius of curvature, expressed in meters, and CURV max Expressed in diopters.

[0142] It can be noted that when the surface is locally spherical, the local minimum radius of curvature R min and the local maximum curvature radius R max are the same, and accordingly, the minimum curvature CURV min and the maximum curvature CURV max When the surface is aspherical, the local minimum radius of curvature R min and the local maximum curvature radius R max different.

[0143] According to the minimum curvature CURVmin and the maximum curvature CURV max These expressions, denoted SPH min and SPH max The minimum and maximum spherical powers can be inferred depending on the type of surface considered.

[0144] When the surface under consideration is the object-side surface (also called the front surface), these expressions are as follows:

[0145] and Where n is the refractive index of the lens's constituent material.

[0146] If the surface under consideration is the lateral surface of the eyeball (also called the posterior surface), these expressions are as follows:

[0147] and Where n is the refractive index of the lens's constituent material.

[0148] As is well known, the average spherical power SPH at any point on the aspherical surface is mean It can also be defined by the following formula:

[0149]

[0150] Therefore, the expression for the mean spherical power depends on the surface considered:

[0151] - If the surface is an object-side surface, then

[0152] - If the surface is the lateral surface of the eyeball, then

[0153] - Also through the formula CYL = | SPH max -SPH min |Define cylinder CYL.

[0154] The properties of any aspherical surface of a lens can be expressed in terms of the local average spherical power and cylindrical power.

[0155] For aspherical surfaces, the local cylindrical axis γ can be further defined AX . Figure 4 shows the astigmatism axis γ as defined in the TABO convention, while Figure 5 Shows the cylindrical axis position γ in the convention defined for characterizing aspheric surfaces AX .

[0156] Cylindrical axis γ AX is the maximum curvature CURV maxThe orientation of the eye is relative to a reference axis and in an angle in a selected rotational direction. In the convention defined above, the reference axis is horizontal (the angle of this reference axis is 0°) and the rotational direction is counterclockwise for each eye when looking at the wearer (0°≤γ AX ≤180°). Therefore, the cylindrical lens axis at +45° is γ AX The axis value of represents the obliquely oriented axis that extends from the upper right quadrant to the lower left quadrant when looking at the wearer.

[0157] At least a portion, for example greater than 50%, preferably all of the optical elements 14 may be lenslets having an outer shape that can be inscribed in a circle having a diameter greater than or equal to 0.2 mm (e.g. greater than or equal to 0.4 mm, for example greater than or equal to 0.6 mm, for example greater than or equal to 0.8 mm) and less than or equal to 2.0 mm (e.g. less than or equal to 1.0 mm).

[0158] For example, the area of ​​each optical element is greater than or equal to 0.4 mm 2 And less than or equal to 5mm 2 , for example, less than or equal to 4 mm 2 .

[0159] The ratio of the total area of ​​the optical elements to the total area of ​​the surface of the optical lens may be greater than or equal to 20% and less than or equal to 80%.

[0160] like Figure 2 As illustrated, at least a portion, for example all, of the optical element 14 may be located on a front surface of the optical lens.The front surface of the lens element corresponds to the object side F1 of the lens element facing the object.

[0161] At least a portion, for example all, of the optical element 14 may be located on a back surface of the optical lens.The back surface of the lens element corresponds to the eye side F2 of the lens element facing the eye.

[0162] For example, when the lens element is encapsulated between two lens substrates, at least a portion, for example all, of the optical element 14 may be located between the front and back surfaces of the optical lens. Advantageously, this provides better protection for the optical element.

[0163] For each circular area with a radius between 2 mm and 4 mm, including a geometric center located at a distance greater than or equal to the radius + 5 mm from the optical center of the optical lens, the ratio between the sum of the areas of the optical element 14 located within the circular area and the area of ​​the circular area can be between 20% and 70%.

[0164] The optical elements may be randomly distributed across the lens elements.

[0165] Alternatively, and as Figure 1 It is shown that at least 50%, such as at least 80%, such as all of the optical elements are positioned along at least 5 concentric rings, and wherein the concentric rings are not adjacent to each other. The concentric rings may be annular rings.

[0166] Advantageously, this configuration provides a good balance between mitigating refractive errors in the wearer's eye and the wearer's visual performance or comfort.

[0167] The optical lens may include optical elements arranged in at least two concentric rings, preferably more than 5, more preferably more than 10 concentric rings. For example, the optical elements may be arranged in 11 concentric rings centered on the optical center of the optical lens.

[0168] The diameters of all optical elements on a concentric ring of lens elements may be substantially the same. For example, all optical elements on a lens element have substantially the same diameter.

[0169] The inventors have determined that, using this configuration, the difference in the standard deviation of the 60° specular gloss measured on the central area of ​​the optical lens (e.g., at the optical center) and on the peripheral area of ​​the optical lens (e.g., at the periphery) can be less than or equal to 2GU, for example, less than 1.2GU. This shows that, using Figure 1 The proposed configuration provides a high level of aesthetics and repeatability of measurements. Advantageously, the acceptance of the optical lens is improved, in particular among young wearers.

[0170] The inventors have also determined that for Figure 1 For an optical lens shown above, the standard deviations of image gloss clarity (DOI) measured on a central area of ​​the optical lens (e.g., at the optical center) and on a peripheral area of ​​the optical lens (e.g., at the periphery) overlap.

[0171] The inventors have also determined that for an optical lens in which at least 50%, for example at least 80%, for example all of the optical elements are positioned along at least 5 concentric rings and these concentric rings are not adjacent to each other, the average image gloss clarity (DOI) measured on the peripheral zone (for example at the periphery) of the optical lens is greater than or equal to 20 DOI index (for example greater than or equal to 25 DOI index) and less than or equal to 35 DOI index (for example less than or equal to 30 DOI index).

[0172] Alternatively, at least 50%, such as at least 80%, such as all of the optical elements are positioned on the lens element in a mesh (e.g. a structured mesh). The structured mesh may be a square mesh or a hexagonal mesh or a triangular mesh or an octagonal mesh or a honeycomb mesh. Alternatively, the mesh structure may be a random mesh, such as net.

[0173] Figure 3 An embodiment is shown in which the optical elements are positioned on a cellular network.

[0174] like Figure 7 As shown above, for an optical lens in which optical elements are positioned on a structured network (such as a honeycomb network), the difference in standard deviation of the 60° specular gloss measured on a central area of ​​the optical lens (e.g., at the optical center) and on a peripheral area of ​​the optical lens (e.g., at the periphery) is greater than or equal to 5GU.

[0175] like Figure 7 As shown above, for an optical lens in which optical elements are positioned on a structured network (such as a honeycomb network), the standard deviation of the 60° specular gloss measured on a peripheral area of ​​the optical lens (e.g., at the periphery) is less than or equal to 2GU, for example, less than or equal to 1.5GU.

[0176] like Figure 8 As shown above, for an optical lens in which optical elements are positioned on a structured network (such as a honeycomb network), the standard deviations of image gloss clarity (DOI) measured on a central region of the optical lens (e.g., at the optical center) and on a peripheral region of the optical lens (e.g., at the periphery) do not overlap.

[0177] like Figure 8 As shown above, for an optical lens in which optical elements are positioned on a structured network (such as a honeycomb network), the standard deviation of the image gloss clarity (DOI) measured on the peripheral area of ​​the optical lens (for example, at the periphery) is less than or equal to 2DOI index.

[0178] like Figure 8 As shown above, for an optical lens in which optical elements are positioned on a structured network (such as a honeycomb network), the standard deviation of the image gloss clarity (DOI) measured on the peripheral area of ​​the optical lens (for example, at the periphery) is less than or equal to 2DOI index.

[0179] The present disclosure has been described above by means of embodiments without limiting the general inventive concept. Many further modifications and variations will be apparent to those skilled in the art upon reference to the foregoing illustrative embodiments, which are given by way of example only and are not intended to limit the scope of the present disclosure, which is determined solely by the appended claims.

[0180] In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that different features are recited in mutually different dependent claims does not indicate that a combination of these features cannot be used to advantage. Any reference signs in the claims shall not be construed as limiting the scope of the disclosure.

Claims

1. An optical lens intended to be worn by a wearer, the optical lens comprising: - a refractive zone having a refractive power based on the wearer's prescription; - a plurality of optical elements, each optical element having a transparent optical function of not focusing an image on the retina of the eye of the wearer when the optical lens is worn under standard wearing conditions, The 60° mirror glossiness on the central area of ​​the optical lens and on the peripheral area of ​​the optical lens are similar.

2. The optical lens according to claim 1, wherein: The standard deviations of the 60° specular gloss measured on a central area of ​​the optical lens and on a peripheral area of ​​the optical lens overlap.

3. The optical lens according to claim 1 or 2, wherein: The average distinctness of image (DOI) measured on a central zone of the optical lens and on a peripheral zone of the optical lens is greater than or equal to 10 DOI index.

4. An optical lens according to any one of the preceding claims, wherein: At least a portion of one of the front and back surfaces of the optical lens comprises at least one layer of at least one coating element, the at least one coating element covering at least a portion of the surface on which the optical element is placed.

5. An optical lens according to any one of the preceding claims, wherein: At least 50% of the optical elements are located on one of the surfaces of the optical lens.

6. An optical lens according to any one of the preceding claims, wherein: At least 50% of the optical elements are located between the front and back surfaces of the optical lens.

7. An optical lens according to any one of the preceding claims, wherein: At least 50% of the optical elements are refractive lenslets.

8. An optical lens according to any one of the preceding claims, wherein: At least 50% of the optical elements are positioned along at least 5 concentric rings, and wherein the concentric rings are not adjacent to each other.

9. The optical lens according to claim 8, wherein: The difference between the standard deviations of the 60° specular gloss measured on the central area of ​​the optical lens and on the peripheral area of ​​the optical lens is less than or equal to 2GU.

10. The optical lens according to claim 8 or 9, wherein: The standard deviations of the distinctness of image (DOI) measured on a central zone of the optical lens and on a peripheral zone of the optical lens overlap.

11. An optical lens according to any one of the preceding claims, wherein: At least 50% of the optical elements are positioned on a structured mesh, the structured mesh being a square mesh or a honeycomb mesh or a triangular mesh or an octagonal mesh.

12. The optical lens according to claim 11, wherein: The difference between the standard deviations of the 60° specular gloss measured on the central area of ​​the optical lens and on the peripheral area of ​​the optical lens is greater than or equal to 5 GU.

13. The optical lens according to claim 11 or 12, wherein: The standard deviation of the 60° specular gloss measured on the peripheral zone of the optical lens is less than or equal to 2 GU.

14. The optical lens according to any one of claims 11 to 13, wherein: The standard deviations of the Distinction of Image (DOI) measured on a central zone of the optical lens and on a peripheral zone of the optical lens do not overlap.

15. The optical lens according to any one of claims 11 to 14, wherein: The standard deviation of the distinctness of image (DOI) measured on the peripheral zone of the optical lens is less than or equal to 2 DOI index.

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