Lens element

Abstract

The invention relates to a lens element (10) intended to be worn in front of the eye of a wearer, comprising at least a first set of optical elements and a second set of optical elements (14F, 14R) respectively providing a first optical function and a second optical function. When worn by the wearer, the first set of optical elements (14F) is located further from the rotation center (Q') of the eye than the second set of optical elements (14R). At least some of the optical elements of the second set of optical elements (14R) are arranged relative to the first set of optical elements (14F) of the lens element to provide different cumulative optical effects on different zones of the retina of the eye of the wearer according to a respective first gaze direction and a second gaze direction.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a lens element intended to be worn in front of a person's eye in order to particularly inhibit, reduce or control the progression of a refractive anomaly of the eye, such as myopia or hypermetropia. The lens element is particularly an ophthalmic article.

[0002] The term "ophthalmic article" is particularly understood to mean a corrective lens or other lens that can be used as eyeglasses, in particular sunglasses, goggles, visors, etc., or a contact lens worn by a user in direct contact with his eye. BACKGROUND

[0003] Myopia of the eye is characterized by the fact that the eye focuses distant objects in front of its retina. Hypermetropia of the eye is characterized by the fact that the eye focuses distant objects behind its retina. Myopia is generally corrected using a concave lens and hypermetropia is generally corrected using a convex lens.

[0004] It has been observed that some individuals, in particular children, focus inaccurately when using a conventional single-vision optical lens correction when they observe objects located at close range, i.e. in near vision conditions. This is even more true in the case where children have access to and use smartphones from a very young age. Because of this focusing defect for a part of myopic children who are corrected for distance vision, an image of near objects is also formed behind their retina, even in the foveal region.

[0005] This focusing defect can have an impact on the progression of myopia in such individuals. It can be observed that, for most of said individuals, the myopia defect tends to worsen over time.

[0006] Foveal vision corresponds to the observation condition in which the image of the object being viewed is formed on the retina in a central zone of the retina called the foveal zone.

[0007] Peripheral vision corresponds to the sensation of scene elements that are laterally offset with respect to the object being viewed, the image of which is formed on the peripheral part of the retina, away from the foveal zone.

[0008] The ophthalmic correction provided for a subject with refractive error is generally adapted to his foveal vision. However, it is known that the correction must be reduced for peripheral vision with respect to the correction determined for foveal vision. In particular, studies carried out on monkeys have shown that focusing light far behind the periphery of the retina causes the eye to lengthen and thus the myopia defect to worsen, even if at the same time the light is perfectly focused on the fovea.

[0009] There thus appears to be a need for a lens element capable of inhibiting, controlling or at least slowing down the progression of a refractive anomaly of the eye, such as myopia or hypermetropia.

[0010] WO 2019206569 proposes, in the name of the applicant, a solution by disclosing a lens element having optical elements that exhibit, in particular, a focal shift that makes it possible not to focus the image on the periphery of the eye retina in standard wearing conditions.

[0011] The present disclosure aims to provide additional functions, at least in certain cases, in particular depending on the gaze direction. SUMMARY

[0012] To achieve this objective, the present disclosure proposes a lens element intended to be worn in front of the eye of a wearer, the lens element comprising at least a first set of optical elements and a second set of optical elements providing respectively a first optical function and a second optical function,

[0013] - wherein, when the lens element is worn by the wearer, the first set of optical elements is located further from the rotation center of the eye than the second set of optical elements,

[0014] - wherein at least some of the optical elements of the second set of optical elements are arranged relative to the first set of optical elements of the lens element to provide different cumulative optical effects on different zones of the retina of the eye of the wearer according to a respective first gaze direction and a second gaze direction:

[0015] - contribute to a focal shift of the transmitted light on a peripheral zone of the retina of the eye of the wearer according to the first gaze direction, and

[0016] - at least partially or completely counteract the focal shift induced by the first optical function of the first set of optical elements in a central zone of the retina of the wearer according to a second gaze direction different from the first gaze direction.

[0017] Thanks to the different cumulative optical effects, for the first gaze direction, the efficiency of myopia control is improved, since the cumulative cooperative interaction of the two sets of optical elements reinforces the defocus, and in particular for the second gaze angle, the visual acuity can be improved, since the cumulative cooperative interaction of the two sets of optical elements at least partially neutralize each other in terms of defocus.

[0018] Thus, for different gaze directions, at least some of the optical elements of the second set of optical elements will cooperatively distinguish from the first set of optical elements, thereby providing a complementary function to the lens element according to the gaze direction.

[0019] Viewing according to the first gaze direction allows the formation of a blurred / defocused image on a peripheral zone of the retina of the wearer. The focal point of the lens element is negatively shifted to be located upstream of the retina and closer to the back face of the lens element.

[0020] Observation according to the second gaze direction allows to form an image with improved sharpness in the foveal region of the retina.

[0021] According to additional aspects taken alone or in combination with the lens element defined above or the method defined above:

[0022] The protrusions of the first set of optical elements and of the second set of optical elements appear as separate domains on the entrance pupil in the first gaze direction and as contiguous or coincident domains in the second gaze direction.

[0023] In particular, the first gaze direction represents a gaze angle corresponding to between far vision + / - 10°.

[0024] In particular, the second gaze direction represents a gaze angle corresponding to between near vision -40° and -20°.

[0025] The lens element comprises for example a front dioptric zone and a back dioptric zone cooperating to achieve a dioptric power based on a prescription of the eye of the wearer.

[0026] The first set of optical elements can be disposed on the front face of the lens element.

[0027] The second set of optical elements can be disposed on the back face of the lens element.

[0028] The first set of optical elements or the second set of optical elements, or both, can be integrated in an intermediate layer of the lens element.

[0029] The first set of optical elements can be for example concave or convex with respect to the front dioptric zone.

[0030] The second set of optical elements can be for example concave or convex with respect to the back dioptric zone.

[0031] The second set of optical elements can be at least partially of an annular shape.

[0032] At least some of the optical elements of the second set of optical elements can be configured to change a gradient law of the associated first set of optical elements as a function of a lens decentration.

[0033] The invention also relates to a method for conceiving a lens element intended to be worn by a wearer as described above, wherein the position of the second set of optical elements is determined with respect to the center of rotation of the eye of the wearer. BRIEF DESCRIPTION OF DRAWINGS

[0034] Other advantages and features will become apparent upon reading the following detailed description, and upon having a view of the drawings, in which:

[0035] - Figure 1 is a schematic simplified cross-sectional view of a lens element according to the disclosure;

[0036] - Figure 2 , Figure 3A and Figure 3B diagrammatically shows an optical system of an eye and a lens element;

[0037] - Figure 4 shows a lens element with different optical correction zones; and

[0038] - Figure 5 and Figure 6 are possible experimental set-up schematics allowing to check the collaborative properties of the optical elements of a lens element. DETAILED DESCRIPTION

[0039] In all the figures, the same elements have the same reference signs.

[0040] The following embodiments are merely examples. Although the present description refers to one or several embodiments, the application is not limited to this embodiment. Moreover, features described in relation with one embodiment can also be relevant with another embodiment, even if this is not explicitly mentioned. Simple features of different embodiments can also be combined to provide additional implementations.

[0041] In the present description, for a "front" face or a "back" face of a layer or a lens element or a surface, reference is made to the propagation of light rays through the ophthalmic lens when the ophthalmic device carrying the ophthalmic lens is worn on the face of the wearer, towards the eye. Thus, the "front" face is always the face that is farthest from the eye of the user, and thus closest to the field of view, while the "back" face is always the face that is closest to the eye of the user.

[0042] The terms "upstream" or "downstream" are used in relation with the propagation of light from outside the eye, through a lens element worn by the wearer, the pupil of the wearer, and towards the retina of its eye. Thus, when light passes through a first object (surface, layer, image, etc.) and then through a second object in its path towards the retina of the wearer, the first object is upstream of the second object.

[0043] For example, when an image is located in front of the retina, between the pupil and the retina, the image is upstream or in front of the retina of the eye of the wearer.

[0044] Conversely, when light passes through a second element first and then through a first element in its path towards the retina of the wearer, the first object is "downstream" of the second object. Thus, the retina of the wearer is downstream of the lens element and the pupil of the wearer.

[0045] The cumulative effect of the focal shift is understood to be that, when compared to a lens element identical to the lens element but without the optical elements, the optical elements cause a focal shift / re-shaping of the overall lens element upstream of the wearer's retina and closer / nearer to the back of the lens element at least for some light beams. This focal shift upstream of the retina causes the image to be defocused / blurred in the area of interest.

[0046] The cumulative effect of the counteracting focal shift is understood to be that, in a set of optical elements, an optical element causes a focal shift / re-shaping of the overall lens element at least for some light beams to cancel / invert the focal shift of another optical element of the set.

[0047] The present disclosure relates to a lens element intended to be worn in front of a wearer's eye.

[0048] In the context of the present disclosure, the term "lens element" can refer to a lens blank, an uncut optical lens, an ophthalmic optical lens edged to fit a particular spectacle frame, an ophthalmic lens or a contact lens.

[0049] Figure 1 A simplified cross-sectional view of an example of a lens element 10 according to the present disclosure having an anterior face 10F and a posterior face 10R is shown, the lens element being intended to be worn in front of a wearer's eye.

[0050] The lens element 10 comprises a base material 11 having an anterior refractive region 12F and a posterior refractive region 12R. Both refractive regions 12F and 12R have a refractive power based on a wearer's eye prescription.

[0051] The purpose of the wearer's eye prescription-based refractive power of the refractive regions 12F and 12R is to form a sharp or at least more sharp image on the wearer's retina (compared to the case without the lens element 10). Parallel incident light beams will be focused on the retina and so will be for the foveal and peripheral zones of the retina.

[0052] The lens element 10 further comprises a first set of optical elements 14F on its anterior face 10F and a second set of optical elements 14R on its posterior face 10R, the first and second sets of optical elements providing a first and a second optical function, respectively.

[0053] The optical elements 14F and 14R are for example located on at least a portion of the respective refractive regions 12F and 12R.

[0054] In other embodiments, the first set of optical elements 14F and / or the second set of optical elements 14R can be embedded or integrated in one layer of a multi-layer base material (for example in case the base material comprises several layers).

[0055] The first group of optical elements 14F or the second group of optical elements 14R can be part of a specific optical layer of the substrate 11.

[0056] In the context of the present disclosure, the optical elements 14F / or 14R can be considered as optical structures providing a modification of the optical wavefront in terms of intensity, curvature or light deviation with respect to the front and / or back refractive zones 12F / 12R. The physical extension Z (deformation / height) of such optical elements 14F or 14R can be in particular comprised between [0, 1 pm - 50 pm]. In terms of physical extension X / Y (width / length / diameter), it can be comprised between [0.5 pm, 2.5 mm] in at least one direction. The optical elements 14F or 14R can have a (recessed or protruding) microdroplet shape, or a circular ring or annular shape, or a shape according to a circular arc. In the case of a circular ring, annular or circular arc shape of the optical elements 14F or 14R, the cross-section of the ring or circular arc can be comprised between [0.5 pm, 2.5 mm].

[0057] The hard coating can protect the lens element 10 and cover the optical elements 14F and / or 14R and the refractive zones 12F and / or 12R.

[0058] The optical elements 14F and / or 14R can have an absorptive or non-absorptive nature. In the case where the optical elements have an absorptive nature, their absorptive nature can locally reach 100%.

[0059] The optical elements 14F / or 14R can also be configured to scatter or diffract light, in particular with a scattering or diffraction angle in the range of + / - 1° to + / - 30°.

[0060] The substrate 11 is for example made of a plastic material (e.g. a polymeric substrate), such as a thermoset material, in particular made of poly(urea-urethane), or a thermoplastic plastic material, in particular made of polyamide (PA) such as nylon or polycarbonate or polyester.

[0061] The first group of optical elements and / or the second group of optical elements 14F / 14R can be made of the same material as the substrate 11 and thus have the same refractive index.

[0062] In other examples, in particular when embedded, the first group of optical elements and / or the second group of 14F / 14R can be made of a different material having a different refractive index than the refractive material forming the substrate 11.

[0063] In the example of Figure 1 The first group of optical elements 14F is for example protruding from the front face 10F and can be considered as a plurality of individually independent island-like zones. The second group of optical elements 14R is for example recessed from the back face 10R. This optical element can also be considered as a plurality of individually independent island-like zones.

[0064] In other examples not shown, the first set of optical elements 14F and / or the second set of optical elements 14R can be

[0065] - annular or toroidal shape,

[0066] - protruding or recessed,

[0067] - continuous or discontinuous.

[0068] The dioptric zones 12F and 12R are preferably formed as zones other than the zones formed by the plurality of first 14F and second 14R sets of optical elements. In other words, the dioptric zones 12F and 12R are zones complementary to the zones occupied by the plurality of first 14F and second 14R sets of optical elements.

[0069] In particular, in the embodiment of Figure 1 , the lens element 10 presents a central zone C which is devoid of optical elements 14F or 14R.

[0070] The dioptric zones 12F and 12R are configured to provide, in standard wearing conditions, in particular for central foveal vision, to the wearer a first optical power based on the wearer's prescription for correcting a refractive anomaly of the eye of said wearer. The purpose of the dioptric zones 12F and 12R is to focus the parallel incident light on the retina.

[0071] The wearing conditions are understood to be the position of the lens element 10 relative to the eye of the wearer, for example defined by the pantoscopic angle, the cornea-to-lens distance, the pupil-to-cornea distance, the eye rotation center Q' to pupil distance.

[0072] As will be explained in more detail below with respect to Figure 3A and Figure 3B , at least some of the first 14F and second 14R sets of optical elements are arranged in a mutual relationship in such a way that at least some of the second set of optical elements 14R are arranged relative to the first set of optical elements 14F of the lens element to provide, according to a respective first and second gaze direction, different cumulative optical effects on different zones of the retina of the eye of the wearer:

[0073] - contribute to a focal shift of the transmitted light on peripheral zones of the retina of the eye of the wearer according to the first gaze direction, and

[0074] - at least partially or completely counteract the focal shift induced by the first optical function of the first set of optical elements 14F in the central zone of the retina of the wearer according to a second gaze direction different from the first gaze direction.

[0075] In simple terms, at least some of the optical elements of the second set of optical elements 14R are arranged to enhance myopia control, on the one hand, by the effect of de-focusing / defogging the transmitted light according to the first gazing direction, and, on the other hand, to at least partially "neutralize" the first optical function of the first set of optical elements 14F according to the second gazing direction.

[0076] Thus, the wearer will benefit from myopia or hyperopia height control by defocusing in the peripheral zone of the retina in the first gazing direction, and from optimized vision correction of the central zone of the retina in the second gazing direction.

[0077] Furthermore, at least some of the optical elements of the second set of optical elements 14R can be configured to change the gradient law of the associated first set of optical elements 14F according to the lens decentration.

[0078] For light beams that pass through only the first set of optical elements 14F or the second set of optical elements 14R, independent optical functions are achieved.

[0079] The independent first and second optical functions of the first set of optical elements 14F and the second set of optical elements 14R can be the same or can be different.

[0080] The independent optical functions of the first set of optical elements 14F and / or the second set of optical elements 14R can also be a focal shift that causes the image to be at least partially de-focused / defogged on the retina of the wearer's eye, thereby creating un-focused light, for example in front of the retina, in particular in the peripheral zone of the retina, in order to slow down myopia.

[0081] Other independent optical functions can include, according to a non-limiting enumeration, a specific local power correction, an astigmatism correction, an aspherization or a prism to differentially direct the light rays.

[0082] Turning now to Figure 2 , Figure 3A and Figure 3B , the figure is a diagram of the optical system of the eye and of the lens elements 10, thus showing the definitions used in the present disclosure.

[0083] For clarity, only some of the optical elements of the first set of optical elements 14F located on the front face 10F are represented with a dashed outline, and only some of the optical elements of the second set of optical elements 14R located on the rear face 10R are represented with a solid outline. In Figure 3A and Figure 3B , this is also the case, where only some of the optical elements of the first set of optical elements 14F and some of the optical elements of the second set of optical elements 14R are represented.

[0084] More precisely, Figure 2A perspective view representing such a system, which illustrates the parameters a and β used to define the gaze direction. Figure 3A and Figure 3B A vertical plan view parallel to the front-back axis of the wearer's head is presented, this vertical plan passing through the center of rotation of the eye when the parameter β is equal to 0.

[0085] The center of rotation of the eye is noted Q'. Figure 3A The axis Q'F' shown in dotted line in the center is a horizontal axis passing through the center of rotation of the eye and extending in front of the wearer, i.e. the axis Q'F' corresponding to the primary gaze viewing angle. This axis cuts the aspherical surface of the lens at a point called the fitting cross, which is present on the lens to enable the optician to position the lens in the frame. The intersection of the back surface of the lens with the axis Q'F' is the point O. If O is located on the back surface 10R, it can be the fitting cross.

[0086] A top sphere having a center Q' and a radius q' is tangent to the back surface 10R of the lens element 10 at a point of the horizontal axis. As an example, a value of 25.5 mm for the radius q' corresponds to a usual value and provides satisfactory results when the lens is worn.

[0087] A given gaze direction (represented by the solid line in Figure 2 corresponds to a point J of the top sphere and to a position of the eye rotating around Q'; the angle β is the angle formed between the axis Q'F' and the projection of the straight line Q'J on the horizontal plane containing the axis Q'F'; this angle appears on the schematic view of Figure 2 ; the angle a is the angle formed between the straight line Q'J and the projection of the straight line Q'J on the horizontal plane containing the axis Q'F'; this angle appears on the schematic view of Figure 2 and Figure 3A . Thus, a given gaze direction corresponds to a point J of the top sphere or to a pair (a, β). The more positive the value of the gaze lowering angle is, the more the gaze is lowered; and the more negative the value of the gaze lowering angle is, the more the gaze is raised.

[0088] In a given gaze direction, the image of a point M located in the object space at a given object distance is formed between two points S and T corresponding to a minimum distance JS and a maximum distance JT, which will be the sagittal partial focal length and the tangential partial focal length. The image of a point at infinity in the object space is formed at the point F'. The distance D corresponds to the back corolla of the lens.

[0089] Typically, in the distance vision following the primary gaze direction, the object point is at infinity. As represented in Figure 3A , in the near vision following a gaze direction substantially corresponding to an angle a of about 35° and an angle β of about 5° in absolute value towards the nasal side, the object distance is about 30 cm to 50 cm.

[0090] This being explained, it clearly appears from Figure 3A that, when worn by the wearer, the first set of optical elements 14F is arranged at a first range of distances from the center of rotation Q’ of the eye and that the second set of optical elements 14R is arranged at a second range of distances from the center of rotation Q’ of the eye different from the first range of distances, in particular as illustrated in Figure 3, the first range of distances being further from the center of rotation Q’ of the eye than the second range of distances.

[0091] In other words, for a same gazing direction, the first set of optical elements 14F is located further from the center of rotation Q’ of the eye than the second set of optical elements 14R.

[0092] Moreover, as illustrated in the example of Figure 3A , for a certain gazing direction corresponding to near vision, the light ray L traced from the image point M first crosses the first set of optical elements 14F and then crosses the second set of optical elements 14R.

[0093] In this case, for this gazing direction, at least some optical elements of the first set of optical elements 14F and at least some optical elements of the second set of optical elements 14R are arranged in a cooperative relationship.

[0094] In order for said incident light beam L to be illuminated in the central region of the retina of the wearer, the second set of optical elements 14R contributes to at least partially or completely cancelling the first optical function of the optical elements of the first set of optical elements 14F. The second set of optical elements 14R induces a counteracting focal shift which at least partially reverses / neutralizes the focal shift induced by the first set of optical elements 14F.

[0095] This is achieved by at least partially or completely reversing the first optical function of the first set of optical elements 14F in the central region of the retina of the wearer according to this gazing direction corresponding to near vision.

[0096] This cooperation of the optical elements 14F and 14R for the near vision gazing direction can in this case for example improve the near vision.

[0097] In the configuration illustrated in Figure 3B , the gazing direction corresponds to far vision, in which the gazing angle is equal to or close to zero.

[0098] As mentioned above, the central region C is devoid of optical elements 14F and 14R. Thus, for far vision, the vision correction performed by the lens element 10 corresponds to the vision correction provided by the dioptric regions 12F and 12R and to the optical power based on the prescription of the wearer for correcting the refractive anomaly of said eye of the wearer. Thus, the parallel incident light in the central region C is focused on the fovea or central region of the retina by the dioptric regions 12F and 12R.

[0099] However, the incident light beam L' (double-dotted line) for example passes eccentrically through the optical elements 14F and 14R and illuminates the peripheral zone of the retina of the wearer. In this case, the light beam L' is not focused and the first optical function of the first set of optical elements 14F, in particular the focal shift, is enhanced.

[0100] According to a particular example, the second set of optical elements 14R is disposed in a near vision dedicated zone of the lens element.

[0101] As Figure 4 illustrated, the lens element 10 for example comprises a near vision zone NVZ, an intermediate vision zone IVZ and a far vision zone FVZ, for example for a progressive optical lens. Thus, in some cases, the second set of optical elements 14R is disposed only in the near vision zone NVZ.

[0102] At the same time, for example in far vision conditions following the main gaze direction, the object point is at infinity. In this case, the image point M can be considered as being part of the peripheral field of view.

[0103] In this case, at least certain optical elements of the second set of optical elements 14R at least partially provide a focal shift.

[0104] This means that, for example for far vision, the out-of-focus or blurring function resulting from the focal shift for the peripheral field of view in front of the retina is even enhanced by the cooperation of the first set of optical elements 14F and the second set of optical elements 14R, for example producing out-of-focus light in front of the retina, in particular in the peripheral zone, in order to slow down myopia.

[0105] The preferred first gaze direction is for example between gaze angles corresponding to far vision of + / - 10° (for example as Figure 3B depicted) and the preferred second gaze direction is for example between gaze angles corresponding to near vision of < -40° and -20° (for example as Figure 3A depicted).

[0106] The lens element 10 as presented in the figures can be manufactured in various ways, in particular by molding and / or machining and polishing the base material 11 or lens blank.

[0107] To achieve a personalized configuration for the wearer, eye geometry (e.g., the eye's rotation center, pupil position, and retinal shape) is measured. For example, taking into account the specificity of the wearer's eye, for a lens blank that presents optical element 14F and anterior refractive region 12F in cooperation to achieve a refractive power based on the prescription for the wearer's eye, the position of the second set of optical elements 14R can be determined in a personalized manner relative to the rotation center Q' of the wearer's eye, for example, by using a ray tracing method. This is to achieve the aforementioned function of defocusing the transmitted light in the peripheral area of ​​the wearer's retina according to a first gaze direction, and at least partially or completely reversing the defocusing function of the first set of optical elements 14F in the central area of ​​the wearer's retina according to a second gaze direction different from the first gaze direction.

[0108] Figure 5 and Figure 6 A schematic experimental setup is shown, which allows for the implementation of experiments in certain gaze directions (e.g., in...). Figure 5 For distance vision, in Figure 6 For near vision, the first set of optical elements 14F and the second set of optical elements 14R are arranged relative to each other to provide enhanced optical functionality or at least partially cancel their optical functionality.

[0109] In a specific example, as explained above, the first set of optical elements 14F and the second set of optical elements 14R have opposite optical powers. For Figure 5 As shown, for peripheral vision, the wearer perceives a deviation in the optics 14F and 14R, causing them to not compensate and provide a high and enhanced anti-myopia signal.

[0110] for Figure 6 As shown in the near vision diagram, for central vision, the first set of optical elements 14F and the second set of optical elements 14R are perceived superimposed, and thus compensate for the optical power to obtain perfectly clear central vision under near vision conditions.

[0111] In addition to the lens element 10 already described above, Figure 5 and Figure 6 A rotatable camera 50 is also shown.

[0112] The camera's aperture is positioned similarly to the pupil of an eye: the distance between the back surface of the lens and the aperture is close to the desired distance, for example, an average distance of 14 mm.

[0113] The camera 50 can rotate, and the rotation center 51 of the camera should be similar to the rotation center Q' of the eye.

[0114] For example, the distance of the center of rotation from the back surface of the lens is close to 27 mm (average distance), or the distance between the aperture / center of rotation is close to 13 mm.

[0115] The reference (0°) viewing direction is defined as the angular position of the camera 50 when the camera optical axis 53 passes through the lens optical center 55.

[0116] The other viewing directions are defined from this reference, taking the horizontal / vertical direction as the horizontal / vertical angle of rotation from this reference.

[0117] The lens element 10 is positioned so that the camera 50 adopts this reference viewing direction. The lens element 10 has a desired pantoscopic angle 56 and wrap angle, as it is mounted on the eyewear. In the case of averaging, it is possible to approximate the pantoscopic angle to 10° and the wrap angle to 5° (average).

[0118] When the lens element 10 and the camera 50 have been positioned accordingly, the cooperation of the optical elements 14F and 14R in certain gaze directions can be achieved by:

[0119] - selecting at least one viewing direction by rotating the camera 50,

[0120] - capturing an image from the camera 50,

[0121] - determining so as to achieve

[0122] a) in a first gaze direction, for example for distance vision (VR), Figure 5 for peripheral vision, the optical elements 14F and 14R are completely or partially offset, showing that the optical element 14R contributes to the focal shift of the transmitted light according to the first gaze direction on the peripheral zone of the retina of the wearer's eye,

[0123] b) in a second gaze direction, for example for near vision (Vn) Figure 6 , certain optical elements 14F and 14R at least partially or completely superimpose, showing that the optical element 14R at least partially or completely reverses the first optical function of the first set of optical elements 14F according to this second gaze direction different from the first gaze direction in the central zone of the retina of the wearer.

[0124] In Figure 5 , the camera 50 is positioned in the reference (0°) viewing direction, in Figure 6 , the camera 50 is positioned in another (non-zero) viewing direction, in the current case in the 18° viewing direction.

[0125] As in Figure 6As can be seen, the optical elements 14F and 14R superimpose well in the direction of the camera optical axis corresponding to the viewing direction (dotted line 53).

[0126] For example, in the case where the vision correction provided by the refractive zones 12F and 12R of the lens element 10 is -4.0 diopters, for the two gaze directions respectively illustrated, the central vision will correspond to a vision correction of -4.0 diopters, whereas for the peripheral vision, in particular for far vision, the peripheral part of the image will not be focused on the retina and the second set of optical elements 14R contributes to the myopia or hypermetropia control or enhances this control. Figure 5 and Figure 6 For the two gaze directions respectively illustrated, the central vision will correspond to a vision correction of -4.0 diopters, whereas for the peripheral vision, in particular for far vision, the peripheral part of the image will not be focused on the retina and the second set of optical elements 14R contributes to the myopia or hypermetropia control or enhances this control.

[0127] It should thus be understood that the use of the first optical elements 14F and the second set of optical elements 14R allows to extend the functionality of the lens element 10, in particular to extend the functionality of the first set of optical elements 14F in particular cooperation with the second set of optical elements 14R in certain gaze directions.

[0128] In particular, it can be foreseen to use a "standard" semi-finished lens with the first set of optical elements 14F and to customize an optimized manufacturing process to implement the second set of optical elements 14R adapted to a particular wearer in order to obtain a specific myopia or hypermetropia control.

[0129] In this case, the geometry of the wearer's eye (center of rotation of the eye, pupil position and retina shape) can be precisely measured and taken into account simultaneously to implement the customized second set of optical elements 14R.

Claims

1. A lens element (10) intended to be worn in front of an eye of a wearer, comprising at least a first set of optical elements (14F) and a second set of optical elements (14R) providing respectively a first optical function and a second optical function, - wherein, when worn by the wearer, the first set of optical elements (14F) being located further away from a center of rotation (Q') of the eye than the second set of optical elements (14R), - wherein at least some of the optical elements of the second set of optical elements (14R) are arranged relative to the first set of optical elements (14F) of the lens element to provide different cumulative optical effects on different zones of the retina of the eye of the wearer according to a respective first gazing direction and a second gazing direction: - contributing to a focal shift of the transmitted light on a peripheral zone of the retina of the eye of the wearer according to a first gazing direction, the first gazing direction representing between a gazing angle of + / - 10° corresponding to far vision, and - at least partially or completely counteracting the focal shift induced by the first optical function of the first set of optical elements (14F) in a central zone of the retina of the wearer according to a second gazing direction different from the first gazing direction, the second gazing direction representing between a gazing angle of -40° and -20° corresponding to near vision, the position of the second set of optical elements (14R) being determined relative to the center of rotation (Q') of the eye of the wearer.

2. The lens element of claim 1, wherein, The lens element (10) comprises a front dioptric zone (12F) and a back dioptric zone (12R) cooperating to achieve a dioptric power based on a prescription of the eye of the wearer.

3. The lens element of claim 1 or 2, wherein, The first set of optical elements (14F) is arranged on a front face (10F) of the lens element (10).

4. The lens element of claim 1 or 2, wherein, The second set of optical elements (14R) is arranged on a back face (10R) of the lens element (10).

5. The lens element of claim 1 or 2, wherein, The first set of optical elements (14F) or the second set of optical elements (14R), or both, are integrated in an intermediate layer of the lens element (10).

6. The lens element of claim 2, wherein, The first set of optical elements (14F) is recessed relative to the front dioptric zone (12F).

7. The lens element of claim 2, wherein, The second set of optical elements (14R) is recessed relative to the back dioptric zone (12R).

8. The lens element of claim 2, wherein, The first set of optical elements (14F) is protruding relative to the front dioptric zone (12F).

9. The lens element of claim 2, wherein, The second set of optical elements (14R) is protruding relative to the back dioptric zone (12R).

10. The lens element of claim 1 or 2, wherein, The second set of optical elements (14R) is of an annular shape or a shape according to a circular arc.

11. A method for conceiving a lens element as claimed in any one of claims 1 to 10 intended to be worn by a wearer, wherein, The position of the second set of optical elements (14R) is determined relative to the center of rotation (Q') of the eye of the wearer.

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