Method for determining the shape of a nose pad as part of an ophthalmic lens

Abstract

A method, implemented for example by computer means, for determining a shape of a nose pad (34) as part of an ophthalmic lens (11a, 11b) intended to be worn by a wearer, the method comprising: - receiving lens shape data relating at least to the shape of the ophthalmic lens, - receiving morphological data relating at least to the morphology of the nose (N) of the wearer, - determining, based at least on the lens shape data and the morphological data, a shape of the nose pad (34) intended as part of the ophthalmic lens (11a, 11b) intended to be worn by the wearer.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a method for determining the shape of a nose pad as part of an ophthalmic lens. The present disclosure further relates to an ophthalmic lens having a nose pad incorporated. BACKGROUND

[0002] As is known, eyeglasses frames comprise a nose resting portion configured to fit on the nose of the wearer and to hold the eyewear equipment on the head of the wearer. The nose resting portion is formed on the eyeglasses frame to guarantee the positioning of the eyewear equipment with respect to the face of the wearer, with the ophthalmic lens facing the eyes of the wearer.

[0003] As is also known, use is made of an overhanging nose pad extending from a portion of the eyeglasses frame. The overhanging nose pad comprises an arm whose first end extends from the end of the eyeglasses frame and which comprises a second end carrying a plastic pad forming the resting portion of the nose pad.

[0004] The position of the overhanging nose pad can be changed in the handling of the eyewear equipment.

[0005] As is known, nose pads are produced which are integrated in the eyeglasses frame or overhanging, but these are standard and do not adapt to the morphology of each wearer's face.

[0006] There is a need to provide an eyewear equipment which can be adapted to a particular wearer, in which the resting portion prevents the eyewear equipment from slipping on the nose of the wearer and which is comfortable when wearing the eyewear equipment.

[0007] Additionally, there is a need to guarantee the correct wearing of the eyewear equipment, whatever the activity engaged in by the wearer, such as reading on the sofa or performing a physical exercise.

[0008] There is also a need to provide an optimized positioning of the eyewear equipment, in particular of progressive multifocal and single vision lenses correcting myopia, to ensure a good positioning and wearing conditions of the ophthalmic lens with respect to the eyes of the wearer. SUMMARY

[0009] To this end, the present disclosure proposes a method, implemented for example by a computer device, for determining the shape of a nose pad as part of an ophthalmic lens intended to be worn by a wearer, the method comprising:

[0010] - receiving lens shape data relating at least to the shape of the ophthalmic lens,

[0011] - receiving morphological data relating at least to the morphology of the nose of the wearer,

[0012] - determining, based at least on the lens shape data and the morphological data, a shape of a nose pad intended as a part of the ophthalmic lens intended to be worn by the wearer.

[0013] Advantageously, this method allows customizing a nose pad that makes an aesthetic and slim eyewear equipment non-slip and comfortable, taking into account the morphology of the nose of the wearer. A made-to-measure solution can be provided, taking into account the morphology of the wearer.

[0014] Indeed, the nose pad is determined to be adapted to the morphology of the wearer.

[0015] The ophthalmic lens with such a nose pad is also particularly adapted to provide a stabilized and optimized position of the lens, such as a progressive addition lens or a single vision lens.

[0016] Additionally, the ophthalmic lens comprising the nose pad facilitates the manufacturing process of the eyewear equipment. There is no more need to produce a frame forming a nose pad or comprising an overhanging nose pad comprising arms fixed on the lens or the frame.

[0017] This method can provide an eyewear equipment that fits correctly with respect to the face of the wearer, without requiring a large number of parts and their respective stocks. A semi-rim or rimless frame only requires a connecting bar connecting the two ophthalmic lenses of the eyewear equipment. This connecting bar does not need to have a specific shape to form a nose pad or to carry an overhanging nose pad. The manufacturing process of the eyewear equipment comprising a semi-rim or rimless frame is facilitated.

[0018] According to further embodiments, which can be considered alone or in combination:

[0019] - the morphological data further comprise a nose front angle and / or a splay angle and / or a nose width and / or a nose height and / or a nose length and / or a cheekbone shape and / or a cheekbone position, and / or eyebrow height data; and / or

[0020] - receiving wearing conditions of the wearer, such as a pantoscopic angle or an eye-lens distance or a positioning of the lens with respect to the face of the wearer; and / or

[0021] - determining the shape of the nose pad so that the ophthalmic lens reaches an equilibrium on the face of the wearer when the ophthalmic lens is worn by the wearer, and wherein the equilibrated ophthalmic lens is substantially horizontal; and / or

[0022] - the shape of the nose is determined to prevent the ophthalmic lens from contacting at least one cheekbone and / or at least one eyebrow of the wearer when the ophthalmic lens is worn by the wearer; and / or

[0023] - the nose pad and the ophthalmic lens are made of the same material; and / or

[0024] - the nose pad and the ophthalmic lens have the same color tone; and / or

[0025] - the nose pad is intended to be integrated with the ophthalmic lens; and / or

[0026] - the nose pad is intended to be formed on a portion of the ophthalmic lens; and / or

[0027] - the shape of the nose pad is selected within a list of predetermined nose pad shapes based on morphological data of the wearer; and / or

[0028] - the ophthalmic lens intended to be worn by the wearer and the nose pad are manufactured as a one-piece element; and / or

[0029] - the nose pad is manufactured after the ophthalmic lens intended to be worn by the wearer, the ophthalmic lens being manufactured independently from the nose pad; and / or

[0030] - the ophthalmic lens shape data comprise a contour of the ophthalmic lens defining a portion connecting a front surface and a back surface of the ophthalmic lens on a perimeter of the ophthalmic lens and / or a curvature of the back surface of the ophthalmic lens and / or a curvature of the front surface of the ophthalmic lens and / or a shape and a contour of a nasal portion of the ophthalmic lens; and / or

[0031] - the method further comprises determining a shape of an optimized ophthalmic lens comprising the nose pad based on the lens shape data of the initial ophthalmic lens without the nose pad; and / or

[0032] - the shape of the initial ophthalmic lens and / or the contour is modified by the shape and the contour of the nose pad, the shape of the initial ophthalmic lens and / or the contour defining a portion connecting a front surface and a back surface configured to be in the vicinity of the nose of the wearer when the initial ophthalmic lens is worn by the wearer; and / or

[0033] - the nose pad comprises a nose pad fixing portion determined to be fixed on a receiving portion of the ophthalmic lens intended to be worn by the wearer; and / or

[0034] - the shape of the nose pad fixing portion is determined to be complementary to the shape of the receiving portion of the ophthalmic lens configured to receive the nose pad; and / or

[0035] - the nose pad is intended to be formed on a back surface or a nasal portion of the ophthalmic lens; and / or

[0036] - determining the shape of the ophthalmic lens and the nose pad comprises a virtual positioning of the ophthalmic lens comprising the nose pad with respect to the face of the wearer.

[0037] According to another aspect, the disclosure further relates to a method for manufacturing a nose pad according to the disclosure.

[0038] According to another aspect, the disclosure further relates to an ophthalmic lens intended to be worn by a wearer, comprising a protruding portion forming a nose pad,

[0039] The protruding portion forming the nose pad can have a shape defined at least on the basis of wearer morphological data related at least to the morphology of the nose of the wearer.

[0040] Advantageously, the ophthalmic lens comprises a nose resting portion formed by a nose pad designed to fit a specific wearer to fit correctly on the nose of the wearer.

[0041] According to further embodiments, which can be considered individually or in combination:

[0042] - the morphological data further comprise a nose pronasale angle and / or a nose-widening angle and / or a nose width and / or a nose height and / or a nose length and / or a cheekbone shape and / or a cheekbone position, and / or a brow height data; and / or

[0043] - the shape of the nose pad is configured to ensure a balance of the ophthalmic lens on the face of the wearer when the ophthalmic lens is worn by the wearer, and wherein the balanced ophthalmic lens is substantially horizontal; and / or

[0044] - the shape of the nose is configured to prevent the ophthalmic lens from contacting at least one cheekbone and / or at least one brow of the wearer when the ophthalmic lens is worn by the wearer; and / or

[0045] - the nose pad protrudes from the back surface of the ophthalmic lens; and / or

[0046] - the nose pad protrudes from the nose portion of the ophthalmic lens; and / or

[0047] - the ophthalmic lens and the nose pad are made of the same material.

[0048] According to another aspect, the disclosure further relates to a nose pad configured to be directly formed on an ophthalmic lens intended to be worn by a wearer, wherein the nose pad is determined at least on the basis of morphological data of the wearer.

[0049] Advantageously, the nose pad is designed to fit a specific wearer to fit correctly on the nose of the wearer.

[0050] According to further embodiments, which can be considered individually or in combination:

[0051] - the shape of the nose pad is determined at least on the basis of ophthalmic lens shape data and morphological data of the wearer of the ophthalmic lens, the morphological data comprising at least data related to the morphology of the nose of the wearer; and / or

[0052] - the morphological data further comprise a nose pronasale angle and / or a nose-widening angle and / or a nose width and / or a nose height and / or a nose length and / or a cheekbone shape and / or a cheekbone position, and / or a brow height data; and / or

[0053] - the nose pad comprises a fixed part whose surface is configured to have a shape complementary to that of a receiving part of an ophthalmic lens intended to be worn by the wearer. BRIEF DESCRIPTION OF DRAWINGS

[0054] Embodiments of the disclosure will now be described, by way of example only, and with reference to the following drawings:

[0055] - Figure 1 is a schematic view of an ophthalmic lens comprising an overhanging nose pad according to the prior art;

[0056] - Figure 2 is a schematic view of an ophthalmic lens comprising a nose pad according to the disclosure;

[0057] - Figure 3 is a perspective view of an eyewear device according to the disclosure according to a first embodiment;

[0058] - Figure 4a is a representation of an initial ophthalmic lens;

[0059] - Figure 4b is a representation of an optimized ophthalmic lens comprising a nose pad according to the disclosure according to a first embodiment;

[0060] - Figure 5a is a representation of an initial ophthalmic lens;

[0061] - Figure 5b is a representation of an optimized ophthalmic lens comprising a nose pad according to the disclosure according to a second embodiment;

[0062] - Figures 6a to 6c Ophthalmic lenses comprising a nose pad according to the disclosure manufactured according to a first embodiment, a second embodiment and a third embodiment are presented.

[0063] The elements in the figures are presented for the purpose of illustrating the embodiments of the disclosure and not as a definition of the limits of the disclosure. For example, the dimensions of some of the elements in the figures can be exaggerated relative to other elements to help improve the understanding of the embodiments of the disclosure. DETAILED DESCRIPTION

[0064] Figure 1 An ophthalmic lens 1 configured for use in an eyewear device is presented, the ophthalmic lens 1 comprising a back surface 2. The ophthalmic lens comprises an overhanging nose pad 3 formed by arms 4 and a plastic pad 5. The first end of the arms 4 is fixed to the back surface 2 and the second end is fixed to the pad 5. The arms 4 are often required to be shaped to position the pad relative to the nose of the wearer of the eyewear device. The arms 4 of the overhanging nose pad 3 are shaped relative to the shape of a standard wearer.

[0065] In this way, according to the prior art, ophthalmic lenses comprising overhanging nose pads can not be adapted to a particular wearer.

[0066] There is also a risk that the arms 4 with thin pads deform over time based on the manipulation of the wearer. Over time, the nose pads can not even be adapted to rest on the nose of a standard wearer.

[0067] Additionally, the nose of the wearer can be smaller than that of a standard wearer, and the eyewear device can slip on the nose of the wearer of the eyewear device.

[0068] Figure 2 An ophthalmic lens 11 according to the disclosure is illustrated, the ophthalmic lens 11 being configured for use in an eyewear device. The ophthalmic lens 11 comprises a back surface 12 and a nose portion 13. The ophthalmic lens 11 comprises a nose pad 14 protruding from a portion of the ophthalmic lens 11.

[0069] The nose pad 14 can protrude from the back surface 12 and / or the nose portion 13 of the ophthalmic lens 11. As Figure 2 illustrated, the nose pad protrudes from the back surface 12 of the ophthalmic lens 11 in the vicinity of the nose portion 13.

[0070] The nose pad 14 can protrude substantially perpendicularly from the back surface 12 of the ophthalmic lens 11.

[0071] The nose pad 14 comprises a nose portion 15 which is flush with the nose portion 13 of the ophthalmic lens 11, thereby forming a surface continuity. Said surface continuity is formed by the nose portions 13 and 15 which are determined to rest on the nose of the wearer of the eyewear device.

[0072] The shape of the nose pad 14 intended as a part of the ophthalmic lens 11 intended to be worn by the wearer is determined by a method comprising:

[0073] - receiving lens shape data relating at least to the shape of the ophthalmic lens 11,

[0074] - receiving morphological data relating at least to the morphology of the nose of the wearer,

[0075] - determining, based at least on the lens shape data and the morphological data, the shape of the nose pad 14 intended as a part of the ophthalmic lens 11 intended to be worn by the wearer.

[0076] The wearer selects an eyewear device for which the nose pad 14 is provided on the ophthalmic lens to form an ophthalmic lens according to the disclosure. The ophthalmic lens 11 according to the disclosure will also be referred to as an optimized ophthalmic lens 11 relative to the initial ophthalmic lens without the nose pad 14.

[0077] The eyewear device comprises at least an initial ophthalmic lens without a nose pad, having specific lens shape data.

[0078] The lens shape data of the ophthalmic lens comprises: a profile of the ophthalmic lens defining a portion connecting the front surface and the back surface of the ophthalmic lens on the perimeter of the ophthalmic lens; and / or a curvature of the back surface of the ophthalmic lens; and / or a curvature of the front surface of the ophthalmic lens; and / or a shape and profile of a portion of the nasal part of the ophthalmic lens defining a portion connecting the front surface and the back surface configured to be in the vicinity of the nose of the wearer when the ophthalmic lens is mounted on a common eyewear device worn by the wearer.

[0079] The morphological data further comprises a nasal pronation angle and / or a nasal splaying angle and / or a nasal width and / or a nasal height and / or a nasal length and / or a malar shape and / or a malar position, and / or an eyebrow height data.

[0080] These morphological features are known by the person skilled in the art. These features are detailed hereafter.

[0081] The nasal pronation angle is the angle formed between the nasal bridge and the forehead of the wearer.

[0082] The nasal splaying angle is the angle formed between the two sides of the nose.

[0083] The nasal width is the distance on a horizontal axis of the most distal ends of the nose of the wearer.

[0084] The nasal height is the distance between the rhinion and the subnasale. The nasal height can also be understood as the distance in the vertical direction between the most distal upper end and the most distal lower end of the nose of the wearer.

[0085] The nasal length is the distance between the rhinion and the tip of the nose.

[0086] The malar shape is defined according to the malar prominence. The malar prominence can also be considered as the zygomatic prominence. The malar prominence is defined as the enlargement of the temporal zygomatic process of the cranium which forms the inferior lateral orbital rim.

[0087] The malar bone comprises the most prominent part located below the eye socket.

[0088] The shape of the malar bone can be hollow, flat, slightly rounded (considered as normal), rounded (considered as full) or prominent (considered as bony).

[0089] The height of the eyebrow is defined according to the vertical axis. The height of the eyebrow is the distance between the rhinion and the lower end of the eyebrow.

[0090] The design of the ophthalmic lens can be influenced by the shape and / or position of the malar bone, and / or the position of the eyebrow. The morphological data relative to the malar bone can influence the pantoscopic angle.

[0091] The nose pads 14 are configured to fit on the nose of the wearer without slipping, while preventing the ophthalmic lens 11 from coming into contact with the cheekbones and / or the eyebrows of the wearer.

[0092] The nasal pronasale and / or the nasal spread and / or the nasal width can be measured using a simple nose gauge, a protractor, modeling clay and / or a 3D scan.

[0093] To determine the correct position and shape of the nose pads 14, it is preferable to have the nasal pronasale and the nasal width.

[0094] In a more preferred embodiment, the morphological data provided also include the nasal spread and / or the nasal height and / or the nasal length and / or the shape of the cheekbones and / or the position of the cheekbones, and / or the eyebrows height data.

[0095] The morphological data can be measured in the eye care practitioner shop or can be measured online.

[0096] The shape of the nose pads 14 is determined based on the lens shape data and the morphological data.

[0097] Once the morphological data are obtained, they are provided to the lens designer or to the nose pads designer, together with the wearer's prescription and the wearing conditions of the wearer and the positioning of the lens relative to the face of the wearer.

[0098] For example, the wearing conditions of the wearer and the positioning of the lens relative to the face of the wearer include the pantoscopic angle and / or the wrap angle and / or the fitting height and / or the semi-pupil distance.

[0099] The wearing conditions can be standard wearing conditions. The standard wearing conditions correspond to a distance between the center of rotation of the eye and the back of the ophthalmic lens of 25.5 mm, a distance between the pupil of the eye and the back of the ophthalmic lens of 12 mm, a pantoscopic angle of 8 degrees and a wrap angle of 0 degrees.

[0100] The pantoscopic angle is the angle in the vertical plane between the optical axis of the ophthalmic lens and the visual axis of the eye in the primary eye position, which is generally considered to be horizontal.

[0101] The wrap angle is the angle in the horizontal plane between the optical axis of the ophthalmic lens and the visual axis of the eye in the primary eye position, which is generally considered to be horizontal.

[0102] These additional data can further customize the shape of the nose pad 14 taking into account the shape data of the ophthalmic lens, the orientation of the ophthalmic lens and the positioning of the ophthalmic lens relative to the face of the wearer. For example, the pantoscopic angle defines the angle of inclination of the ophthalmic lens relative to the face of the wearer. The nose pad 14 is intended to rest on the nose of the wearer and is intended as part of the ophthalmic lens 11 according to the present disclosure. The nose pad 14 can require that the pantoscopic angle be taken into account to define the overall shape of the nose pad, the surface from which the nose pad 14 protrudes and the direction in which the nose pad 14 protrudes to ensure a comfortable contact with the nose of the wearer when the ophthalmic lens 11 is worn by the wearer.

[0103] According to one embodiment, the optimized ophthalmic lens 11 profile can be calculated taking into account the morphological data of the wearer and the profile of the initial ophthalmic lens. The back surface of the optimized ophthalmic lens 11 can also be calculated taking into account the shape data of the initial ophthalmic lens, the morphological data and the profile of the optimized ophthalmic lens 11. The back surface of the optimized ophthalmic lens 11 can be optimized to include or receive the nose pad 14.

[0104] The overall shape of the optimized ophthalmic lens 11 is based on the overall shape of the initial ophthalmic lens. For example, if the initial ophthalmic lens has a notably rectangular shape, the optimized ophthalmic lens 11 will also have a notably rectangular shape.

[0105] The shape and / or profile of the initial ophthalmic lens, which defines the portion of the connecting front and back surfaces configured to be in the vicinity of the nose of the wearer when the ophthalmic lens is worn by the wearer, is changed due to the shape and profile of the nose pad. This will be further discussed when describing Figure 4a 、 Figure 4b 、 Figure 5a and Figure 5b .

[0106] Preferably, the profile of the ophthalmic lens 11 including the nose pad 14 takes into account the morphological data to adapt the size of the ophthalmic lens 11 and prevent contact between the ophthalmic lens 11 and the cheekbones and / or eyebrows of the wearer.

[0107] To determine the positioning of the nose pad 14 on the ophthalmic lens 11, the wearer can wear an eyewear device including the best existing nose pad positioning relative to the shape of the face of the wearer, more particularly relative to the nose of the wearer. The eyewear device can not necessarily correspond exactly to the shape of the nose of the wearer, but can be taken into account in order to very closely approximate the fitting parameters of the nose pad 14 to be determined, such as the fitting height.

[0108] Alternatively, to obtain more accurate fitting parameters related to the selected eyewear device, a virtual positioning of the selected eyewear device on the image of the wearer's face can be considered. To perform a virtual positioning of the selected eyewear device on the wearer's face, at least three conditions can be considered:

[0109] - the selected eyewear device is horizontally positioned with respect to a virtual horizontal line connecting the wearer's eyebrows,

[0110] - the selected eyewear device is symmetrically positioned in the horizontal direction with respect to the top part of the nose,

[0111] - the vertical position of the selected eyewear device is adjusted so that the vertical distance between the reference point and the top of the nose is equal to a target value.

[0112] The target value can be for example 4.5 mm. The target value can depend on the selected eyewear device, the gender (male, female) of the wearer, the age (child, adult) of the wearer and the ethnicity (Asian, Caucasian...) of the wearer.

[0113] In an alternative embodiment of the virtual positioning of the eyewear device, the selected eyewear device is vertically positioned below the virtual horizontal line connecting the wearer's eyebrows.

[0114] Advantageously, the virtual positioning is easy to perform as it does not require the use and possession of the selected eyewear device to determine the shape of the nose pad 14.

[0115] The virtual positioning can be used after providing the wearer with an eyewear device comprising an optimal existing nose pad positioning with respect to the shape of the wearer's face, more particularly the nose of the wearer. The very approximation of the fitting parameters (such as the fitting height) can become more accurate.

[0116] The shape of the nose pad 14 is determined so that the ophthalmic lens 11 reaches an equilibrium on the face of the wearer when the wearer wears the lens 11, and wherein the equilibrated ophthalmic lens 11 is substantially horizontal.

[0117] Figure 3 An eyewear device 30 comprising a first ophthalmic lens 11a and a second ophthalmic lens 11b according to the present disclosure is illustrated. The first ophthalmic lens 11a and the second ophthalmic lens 11b each comprise a nose pad 34 protruding from the nose portion 33 and the back surface 32 of the lens. The nose pad 34 is configured to rest on the nose of the wearer. The nose pad 34 comprises a nose portion 35 flush with the nose portion 33 of the ophthalmic lens 11 to form a continuous surface fitting the nose of the wearer. Thus, the complexity of the frame design can be reduced as the contact with respect to the nose of the wearer is no longer considered in the frame design.

[0118] The eyewear device 30 comprises a frame 31 without nose pads. The frame 31 comprises a first temple 31a and a second temple 31b fixed respectively to the temple end of the first ophthalmic lens 11a and of the second ophthalmic lens 11b. The frame 31 further comprises a connecting bar 31c fixed to the first lens 11a and to the second lens 11b. The connecting bar 31c only serves as a connecting element between the first ophthalmic lens 11a and the second ophthalmic lens 11b. This connecting bar 31c is no longer restricted to a specific shape to form a nose pad or to carry an overhanging nose pad. The manufacturing process is facilitated to produce an eyewear device comprising a half-rim or rimless frame. The connecting bar 31 can have any shape, for example the connecting bar can be straight, curved or arcuate.

[0119] With the ophthalmic lens 11 according to the disclosure, it is no longer required to produce a complex frame forming a nose pad or comprising an overhanging nose pad comprising arms fixed on the lens or on the frame.

[0120] With the ophthalmic lens 11 according to the disclosure, it is possible to provide an eyewear device that fits correctly with respect to the face of the wearer without requiring complex frame designs or a large number of parts to form overhanging nose pads and their respective stocks. The half-rim or rimless frame only requires a connecting bar 31c connecting the two ophthalmic lenses 11a, 11b of the eyewear device.

[0121] Figure 4a 、 Figure 4b 、 Figure 5a and Figure 5b The initial ophthalmic lens 41, 61 is shown. The ophthalmic lens 51, 71 comprises a modified profile 55, 75 with respect to the profile of the initial ophthalmic lens 41, 61, wherein the nose portion is modified so that at least a portion of the nose portion 53, 73 is in contact with the nose N of the wearer. At least a portion of the nose portion forms a nose pad 54, 74 designed to fit on the nose of the wearer.

[0122] Figure 4a The initial ophthalmic lens 41 is shown. The initial ophthalmic lens 41 comprises a front surface 42 and a nose portion 43. The initial ophthalmic lens 41 has a profile 45.

[0123] Figure 4a The nose N of the wearer is also shown. The nose N is spaced apart from the nose portion 43 of the initial ophthalmic lens 41 by a distance D. In this embodiment, the initial ophthalmic lens 41 requires an overhanging nose pad (3) in or a frame that accommodates the initial ophthalmic lens 41 comprising a nose pad to enable the eyewear device comprising the initial ophthalmic lens 41 to rest on the nose of the wearer. Figure 1

[0124] Figure 4b ​An optimized ophthalmic lens 51 is shown. The optimized ophthalmic lens 51 comprises a front surface 52 and a nose portion 53. The optimized ophthalmic lens 51 has a profile 55.

[0125] The profile 55 of the optimized ophthalmic lens 51 is modified with respect to the profile 45 of the initial ophthalmic lens 41. The nose portion 53 has been lengthened in the direction of the nose N of the wearer from the top to the bottom of the optimized ophthalmic lens 51 by a distance D shown Figure 4a without changing the overall shape of the initial ophthalmic lens 41. The nose portion 53 has been lengthened so as to form a nose rest 54 that rests on the nose N of the wearer. The nose rest 54 forms a tangent to the nose flares.

[0126] The nose rest 54 extends on the nose structure 53 from the front surface 52 to the back surface of the optimized ophthalmic lens 51.

[0127] The nose rest 54 particularly advantageously maximizes a contact surface 56 between the nose of the wearer and the nose rest 54 of the optimized ophthalmic lens 51. Maximizing the contact surface enables to improve the comfort of wearing the eyewear equipment.

[0128] Figure 5a An initial ophthalmic lens 61 is shown. The initial ophthalmic lens 61 comprises a front surface 62 and a nose portion 63. The initial ophthalmic lens 61 has a profile 65.

[0129] Figure 5a A nose N of a wearer is also shown. The nose N is spaced apart from the nose portion 63 of the initial ophthalmic lens 61 by a distance D. In this embodiment, the initial ophthalmic lens 61 requires an overhanging nose rest (3) in Figure 1 or a frame that accommodates the initial ophthalmic lens 61 comprising a nose rest to enable the eyewear equipment comprising the initial ophthalmic lens 61 to rest on the nose of the wearer.

[0130] Figure 5b An optimized ophthalmic lens 71 is shown. The optimized ophthalmic lens 71 comprises a front surface 72 and a nose portion 73. The optimized ophthalmic lens 51 has a profile 75.

[0131] The profile 75 of the optimized ophthalmic lens 71 is modified with respect to the profile 65 of the initial ophthalmic lens 61. A portion of the nose portion 73 of the optimized ophthalmic lens 71 has been lengthened in the direction of the nose N of the wearer by a distance D shown. Figure 5a The portion of the nose portion 73 that is lengthened in the direction of the nose of the wearer forms a nose rest 74 that rests on the nose N of the wearer. The contact surface 76 of the nose rest 74 with the nose N of the wearer has to be smooth and extends in a direction approaching the flares.

[0132] Ideally, the final shape of the nose pad 74 can be considered to determine the optimized ophthalmic lens 71 rear surface.

[0133] Advantageously, Figure 5b Embodiments of the ophthalmic lens 11 according to the disclosure can require less glass material to be manufactured. Figure 4b Embodiments of the ophthalmic lens 11 according to the disclosure can require less glass material to be manufactured.

[0134] After disclosing embodiments of the ophthalmic lens 11 according to the disclosure comprising a nose pad extending from the rear surface 12 as illustrated in Figure 2 or the nose portion 53, 73 as illustrated in Figure 4b and Figure 5b The manufacturing method of the nose pad 14 according to the disclosure will now be discussed.

[0135] According to a first manufacturing embodiment, the lens can be obtained by digital surfacing.

[0136] The manufacturing method comprises a data acquisition step, wherein data about the lens are acquired, such as the base material, the wearer’s prescription, the lens diameter. Additional data are about the nose pad (shape type...), the frame of the eyewear device and the morphological data of the wearer.

[0137] Based on this acquired data, the optimized ophthalmic lens 11 profile and the nose pad 14 shape are determined.

[0138] Once the final design of the optimized ophthalmic lens 11 is defined, the lens can be manufactured using a lens blank. The optimized ophthalmic lens 11 is machined from the lens blank using a polycrystalline diamond tool. The manufacturing step comprises a polishing step, wherein the lens surface is polished.

[0139] In a preferred embodiment, additional options can be provided to the optimized ophthalmic lens 11 by applying a thin film or coating, for example filtering blue light.

[0140] In one embodiment, the optimized ophthalmic lens 11 and the nose pad are obtained by molding. This embodiment is preferred when the ophthalmic lens 11 comprises a nose pad 14 selected within a predetermined list of nose pads. For example, the database can comprise a list of at least two, preferably at least five, predetermined nose pads determined based on standard morphological data related to age and / or gender and / or wearer. The molded ophthalmic lens 11 comprises one molded predetermined nose pad selected within the database.

[0141] Finally, the optimized ophthalmic lens 11 is mounted into the frame of the eyewear device.

[0142] In an alternative manufacturing process for obtaining the optimized ophthalmic lens 11, it can be considered to use additive printing.

[0143] In a first particular embodiment of the manufacturing process, the whole optimized ophthalmic lens 11 is obtained by additive printing. Preferably, the additive printing is a DLP-Stereolithography technology (SLA).

[0144] The manufacturing method comprises a data acquisition step, wherein data about the lens are acquired, such as the base material, the wearer’s prescription, the lens diameter. Additional data are about the nose pad (shape type...), the frame of the eyewear equipment and the morphological data of the wearer.

[0145] Based on this acquired data, the profile of the optimized ophthalmic lens 11 and the shape of the nose pad 14 are determined.

[0146] Once the design of the optimized ophthalmic lens 11 and the shape of the nose pad 14 are determined, the optimized ophthalmic lens 11 including the nose pad is printed 80 layer by layer.

[0147] Once the optimized ophthalmic lens 11 is printed, post-printing operations are performed, such as surface treatment and edging, to ensure that each surface of the optimized ophthalmic lens 11 is smooth. In particular, the nose portion 15 of the nose pad 14 is smooth to fit on the nose of the wearer.

[0148] In particular, the nose pad 14 can be formed integrally with the optimized ophthalmic lens 11. The ophthalmic lens 11 and the nose pad intended to be worn by the wearer are manufactured as a one-piece element.

[0149] The lens is preferably printed on a support 81, which is removed once the printing is finished.

[0150] In a second particular embodiment of the manufacturing process, a finished ophthalmic lens 90 is provided. The finished ophthalmic lens 90 refers to an ophthalmic lens adapted to the wearer’s prescription and to the wearer’s wearing conditions. The finished ophthalmic lens 90 can be obtained by molding, die-cutting, additive printing or any other manufacturing process.

[0151] In this embodiment, the nose pad 94 is manufactured by additive printing on the back surface 92 of the finished ophthalmic lens 90. The nose pad 94 is directly printed on the finished ophthalmic lens 90.

[0152] Preferably, the preparation of the back surface 92 can be used to adhere the layers of the printed nose pad 94 on the lens 90. The preparation of the back surface 92 can be a plasma treatment, or the deposition of an additional layer of adhesion.

[0153] The finished ophthalmic lens 90 provided with the nose pad forms an ophthalmic lens according to the disclosure.

[0154] To perform the printing of the nose pad, material spraying (inkjet) can be used. The material forming the nose pad 94 is sprayed drop by drop using a 3D printer head. The material can be immediately solidified using an energy source, preferably UV illumination.

[0155] In a third particular embodiment of the manufacturing process, a finished ophthalmic lens 100 is provided. The finished ophthalmic lens 100 refers to an ophthalmic lens adapted to the prescription of the wearer and to the wearing conditions of the wearer. The finished ophthalmic lens 100 can be obtained by molding, casting, additive printing or any other manufacturing process.

[0156] In this embodiment, similarly to the second particular embodiment of the manufacturing process, the nose pad 104 is manufactured by additive printing. However, the nose pad 104 is printed without requiring the finished ophthalmic lens 100.

[0157] The manufacturing process comprises a fixing step, wherein the nose pad is fixed to a surface of the finished ophthalmic lens 100 to form an ophthalmic lens according to the disclosure. Figure 6c The nose pad 104 is shown fixed on the back surface 102 of the finished ophthalmic lens 100. The nose pad 104 comprises a nose pad fixing portion 105 determined to be fixed on a receiving portion 106 of the ophthalmic lens 11 intended to be worn by the wearer.

[0158] Preferably, the shape of the nose pad fixing portion 105 is determined to be complementary to the shape of the receiving portion 106 of the finished ophthalmic lens 100 intended to be worn by the wearer.

[0159] Advantageously, the complementarity of the shapes enables the nose pad to be firmly fixed on the ophthalmic lens.

[0160] Preferably, the fixing step is achieved by applying a fixing means 107, such as glue, on the nose pad fixing portion 105. More preferably, the fixing step comprises pressing the nose pad 104 to which the fixing means is applied on the receiving portion 106 of the finished ophthalmic lens 100 and / or using light and / or heat activation.

[0161] In one embodiment, before the fixing step, the surface of the finished ophthalmic lens 100 designed to receive the nose pad 104 is surface treated so as to have a smooth surface, enabling the nose pad to be correctly fixed on the finished ophthalmic lens 100.

[0162] As disclosed in the second and particular embodiment of the manufacturing process, the nose pads 94, 104 can be formed on a portion of the finished ophthalmic lens 100. In these embodiments, the nose pads 94, 104 are obtained by additive printing, but the nose pads can be manufactured according to another manufacturing process such as molding or die casting. Regardless of the manufacturing process mentioned in this paragraph to obtain the nose pads, the nose pads 94, 104 are manufactured after the finished ophthalmic lens 90, 100 intended to be worn by the wearer, the finished ophthalmic lens 90, 100 being manufactured independently of the nose pads.

[0163] In particular embodiments, the shape of the nose pad 14 is selected within a list of predetermined nose pad shapes based on the morphological data of the wearer. The predetermined nose pad shapes are standard nose pad shapes stored on a database.

[0164] For example, the database can comprise a list of at least two, preferably at least five, predetermined nose pads determined based on standard morphological data related to the age and / or the gender and / or the wearer.

[0165] Advantageously, the use of predetermined shape nose pads enables the manufacturing process of ophthalmic lenses to be more inexpensive and faster.

[0166] Once the shape of the nose pad 14 has been determined, the nose pad can be formed on the ophthalmic lens to form an ophthalmic lens according to the disclosure.

[0167] In particular embodiments, the nose pad 14 and the optimized ophthalmic lens are made of the same material.

[0168] In another particular embodiment, the nose pad 14 and the ophthalmic lens 11 have the same color tone.

[0169] The disclosure has been described above by way of embodiments, without limiting the general inventive concept.

[0170] Many further modifications and variations to the illustrative embodiments can be apparent to those skilled in the art in light of the above teachings. The scope of the disclosure is to be limited only by the claims.

[0171] 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 should not be construed as limiting the scope of the disclosure.

Claims

1. A method for determining a shape of a nose pad as part of an ophthalmic lens intended to be worn by a wearer, the method comprising: - receiving lens shape data related at least to a shape of an ophthalmic lens, - receiving morphological data related at least to a morphology of a nose of the wearer, - determining, based at least on the lens shape data and morphological data, a shape of the nose pad intended as part of the ophthalmic lens intended to be worn by the wearer, wherein the method further comprises determining a shape of an optimized ophthalmic lens based on lens shape data of an initial ophthalmic lens without nose pad, the optimized ophthalmic lens comprising the nose pad, wherein the initial ophthalmic lens shape data comprises a contour of the initial ophthalmic lens defining a portion connecting a front surface and a back surface of the initial ophthalmic lens over a perimeter of the initial ophthalmic lens and / or a curvature of the back surface of the initial ophthalmic lens and / or a curvature of the front surface of the initial ophthalmic lens and / or a shape and a contour of a nose portion of the initial ophthalmic lens.

2. The method of claim 1, wherein, the morphological data comprises a nose pronation angle and / or a nose spread angle and / or a nose width and / or a nose height and / or a nose length and / or a cheekbone shape and / or a cheekbone position and / or an eyebrow height data.

3. The method of claim 1, wherein, the method further comprises: - receiving a wearing condition of the wearer.

4. The method according to claim 1, wherein the wearing condition of the wearer comprises a pantoscopic angle or an eye-lens distance or a positioning of the lens relative to the face of the wearer.

5. The method of claim 1, wherein, the nose pad is intended to be integrally formed with the ophthalmic lens.

6. The method of claim 1, wherein, the nose pad is intended to be formed on a portion of the optimized ophthalmic lens.

7. The method of claim 1, wherein, the shape of the nose pad is selected within a list of predetermined nose pad shapes based on the morphological data of the wearer.

8. The method of claim 1, wherein, the shape and / or contour of the initial ophthalmic lens defining a portion connecting a front surface and a back surface configured to be in the vicinity of the nose of the wearer when the ophthalmic lens is worn by the wearer is modified by the shape and contour of the nose pad.

9. A method for manufacturing a nose pad as part of an ophthalmic lens intended to be worn by a wearer, the shape of the nose pad being determined by the method according to claim 1.

10. An ophthalmic lens intended to be worn by a wearer, comprising a protruding portion forming a nose pad, wherein the protruding portion forming the nose pad has a shape defined based at least on wearer morphological data related at least to a morphology of a nose of the wearer, wherein the shape of the ophthalmic lens comprising the protruding portion is determined based on lens shape data of an initial ophthalmic lens without nose pad, wherein the initial ophthalmic lens shape data comprises a contour of the initial ophthalmic lens defining a portion connecting a front surface and a back surface of the initial ophthalmic lens over a perimeter of the initial ophthalmic lens and / or a curvature of the back surface of the initial ophthalmic lens and / or a curvature of the front surface of the initial ophthalmic lens and / or a shape and a contour of a nose portion of the initial ophthalmic lens.

11. A nose pad configured to be directly formed on an ophthalmic lens intended to be worn by a wearer, wherein, the nose pad is determined based at least on morphological data of the wearer, wherein the shape of the ophthalmic lens including the nose pad is determined based on lens shape data of an initial ophthalmic lens without nose pad, wherein the initial ophthalmic lens shape data comprises a profile of the initial ophthalmic lens defining a portion of the initial ophthalmic lens connecting a front surface and a back surface of the initial ophthalmic lens over a circumference of the initial ophthalmic lens and / or a curvature of the back surface of the initial ophthalmic lens and / or a curvature of the front surface of the initial ophthalmic lens and / or a shape and profile of a nose portion of the initial ophthalmic lens.

12. The nose pad according to claim 11, having a shape determined based on at least ophthalmic lens shape data.

13. The nosepiece of claim 11, wherein, The nose pad comprises a fixing portion, a surface of the fixing portion being configured to have a shape complementary to a receiving portion of an optimized ophthalmic lens intended to be worn by a wearer.

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