Methods of decorating ophthalmic articles and related ophthalmic articles

Abstract

The invention relates to a method for decorating an ophthalmic article (1) comprising the steps of: - providing an ophthalmic article (1) having a substrate (9) having a first outer surface (9F) intended to be oriented towards the visual field (5) of a user and presenting at least one decorative zone (30) outside a central vision zone (35) of the ophthalmic article (1) and having on the first outer surface (9F) at least one topography (40) having a dimensional length greater than or equal to 1 mm for forming a decorative pattern; depositing on said first outer surface (9F) a thin layer (50) having a refractive index different from the refractive index of the substrate (9) to form an interference mirror (52) on top of the first outer surface (9F).

Description

TECHNICAL FIELD

[0001] The present invention relates to a method of decorating at least partially an ophthalmic article and to the related ophthalmic article. BACKGROUND

[0002] The term "ophthalmic article" is particularly understood to mean a lens, a corrective lens or other lens that can be used as a spectacle lens, for example for eyeglasses, in particular sunglasses, goggles, visors, etc.

[0003] Spectacles or sunglasses not only have a medical function, in particular to protect the eyes, to relieve the vision or to correct the vision of the wearer, but they are also used as "fashion items" and individualization is an important topic in this respect.

[0004] With regard to spectacle frames, which are usually made of plastic material or partly of metal, many decoration techniques are known and used for individualization and for transforming the spectacle lens into a fashion item.

[0005] However, the decoration possibilities for lenses are more limited and the existing decoration techniques are less, in particular easy to implement, providing a wide decoration possibility and limited additional cost.

[0006] Today, the decoration of lenses usually consists in applying on the lens, for example, an interference filter to obtain a mirror effect, or in coloring uniformly or gradually on the lens substrate, adding a dye or a specific pigment in the substrate material.

[0007] With these techniques, it is difficult to obtain some "flashy" fashion effects. SUMMARY

[0008] It is therefore an object of the present invention to propose a method of decorating an ophthalmic article that offers a wide possibility with an industrial level of control cost and manufacturing facilities.

[0009] To this end, the present invention proposes a method of decorating an ophthalmic article comprising the following steps:

[0010] - providing an ophthalmic article having a substrate with a first outer surface intended to be oriented towards the visual field of a user and presenting at least one decoration zone outside a central vision zone of the ophthalmic article and having on the first outer surface in the at least one decoration zone at least one topography having a dimensional length greater than or equal to 1 mm for forming a decoration pattern,

[0011] - depositing on the first outer surface a thin layer having a different refractive index than the refractive index of the substrate to form on top of the first outer surface an interference mirror, wherein the topography has a height / depth variation profile with respect to the average first outer surface greater than the total thickness of the interference mirror.

[0012] A surface decoration allowing various decorative effects, in particular repeatable geometric patterns, can thus be obtained.

[0013] With regard to the prior art, the structure with interference mirrors does not bring discomfort to the wearer. Moreover, the use of a topography having a height / depth variation profile with respect to the average first outer surface greater than the total thickness of the interference mirror allows to enhance the decorative effect.

[0014] The general concept behind the decoration method is that the topography can be seen as a "spontaneous surface defect" created on the ophthalmic article. When a thin layer of different refractive index than the substrate is deposited on said first outer surface to form an interference mirror on top of the first outer surface, this "spontaneous surface defect" induced by the topography is propagated through the deposited thin layer and will modify the optical transfer function of the interference mirror. The topography is replicated by the thin layer and creates an interference decorative pattern at the decorated zone.

[0015] As even small spontaneous defects will end up meaning "defects" in the interference mirror structure and its optical transfer function, very fine and complex patterns can be achieved. Due to the light refraction of the incident light, a uniform color change can be observed at the decorated zone as a function of the observation angle. This effect is especially not possible to obtain with the teachings of the prior art, for example in EP 2682 808.

[0016] It can thus be understood that very very peculiar decorative effects can be achieved with the decoration method described above.

[0017] In an example, the decorated zone is at least 15 mm from the eye position corresponding to the middle position of the pupil of the user when the ophthalmic article is mounted in eyeglasses and then worn by the user.

[0018] The decoration method can comprise one or several individual aspects or combinations below.

[0019] According to an aspect, the topography comprises ribs and / or grooves, in particular with a width in the range of 10-400 pm, more particularly between 50-200 pm.

[0020] The topography can comprise at least one geometric form selected from the group consisting of straight lines, curves, pyramids, needles.

[0021] The topography has for example a height / depth variation profile with respect to the average first outer surface greater than the total thickness of the interference mirror.

[0022] The topography can have a height / depth variation profile with respect to the average first outer surface greater than 20 pm and less than 200 pm, in particular less than 100 pm.

[0023] The topography comprises for example at least one periodic pattern.

[0024] Providing the ophthalmic article comprises in particular the step of injection molding the ophthalmic article in a mold, wherein the mold part configured to form the first outer surface comprises a negative topography forming a positive decorative pattern on the first outer surface.

[0025] According to a further aspect, the mold part can be configured to form the first outer surface comprises an interchangeable mold insert presenting a negative topography forming a positive decorative pattern on the first outer surface.

[0026] Providing the ophthalmic article can alternatively or additionally comprise the step of engraving the topography.

[0027] Providing the ophthalmic article can alternatively or additionally comprise the step of depositing the rib on the front face of the polished ophthalmic article by 3-D printing.

[0028] Providing the ophthalmic article can alternatively or additionally comprise the step of depositing a heated metal wire or grid in the decorative zone on the front face of the polished ophthalmic article.

[0029] After depositing the heated metal wire or grid on the front face of the polished ophthalmic article in the decorative zone, the heated metal wire can be removed.

[0030] The thin layer forming the interferometric mirror is for example deposited by PVD or CVD.

[0031] The interferometric mirror comprises a thin layer for example between two and six layers.

[0032] The ophthalmic article can further comprise a polarizing layer.

[0033] The present invention also relates to an ophthalmic article manufactured according to the method as defined above.

[0034] The ophthalmic article can comprise a polarizing layer.

[0035] The injection molded ophthalmic article further comprises in particular a layer of colored plastic material.

[0036] The present invention also relates to a pair of sunglasses comprising an ophthalmic article as defined above, wherein the decorative zone is located outside the central vision zone of the ophthalmic article, in particular above the central vision zone of the user. BRIEF DESCRIPTION OF DRAWINGS

[0037] Other advantages and features will become apparent upon reading the following description of the figures, in which:

[0038] - Figure 1 An example of a schematic cross-sectional view of an ophthalmic article for decoration is shown,

[0039] - Figure 2 is Figure 1 an exploded view of the layers,

[0040] - Figure 3 Another example of a schematic cross-sectional view of an ophthalmic article for decoration is shown,

[0041] - Figure 4 An example of a flow chart of a method for at least partially decorating an ophthalmic article is shown,

[0042] - Figure 5 An example of a schematic cross-sectional view of an ophthalmic article for decoration after a particular processing step is shown,

[0043] - Figure 5-1 , 5-2, 5-3 and 5-4 show examples of topologies and their length dimensions,

[0044] - Figure 5-5 A cross-sectional view showing details of Figure 5 is shown,

[0045] - Figure 6 An example of a schematic cross-sectional view of an ophthalmic article for decoration after another processing step is shown,

[0046] - Figure 7 An example of a top view of an ophthalmic article after another processing step is shown,

[0047] - Figure 8 An example of a cross-section of a mold for providing an ophthalmic article having a topology is shown,

[0048] - Figure 9 and Figure 10 An example of a decorated ophthalmic article obtained with the method is shown,

[0049] and

[0050] - Figure 11 Another example of a decorated ophthalmic article obtained with the method is shown. DETAILED DESCRIPTION

[0051] The "topology" in the present description can be considered as a three-dimensional pattern with respect to the optically polished surface of the ophthalmic article.

[0052] In all figures, identical elements have identical reference numerals.

[0053] The following examples are merely illustrative. While the description refers to one or more examples, the application is not limited to such examples. In addition, features described in connection with one example can be pertinently incorporated into another example even though this is not explicitly mentioned. Simple features of different examples can also be combined to provide further implementations.

[0054] In the present description, the "front" or "back" face of a layer refers to the propagation of light through the ophthalmic lens towards the eye when the ophthalmic equipment with the ophthalmic lens is worn on the wearer's face. Thus, the "front" face is always the face closest to the user's field of view and the "back" face is always the face closest to the user's eye.

[0055] "Upstream" or "downstream" of two elements or layers refers to the propagation of light towards the eye in the same system as mentioned above. Thus, when light passes through its path to the user's eye first through a first element and then through a second element, the first element is deployed upstream of the second element. Conversely, when light passes through its path to the user's eye first through the second element and then through the first element, the first element is deployed "downstream" of the second element.

[0056] The term "crystal" or "crystal glass" is understood to mean a glass / optical material classified in five categories according to the standardized international definition of glass with a light transmission of 0 degree. It is a glass with a transmittance in the visible spectrum ranging between 80% and 100%.

[0057] The ophthalmic article 1 as illustrated is intended for example for eyeglasses, in particular sunglasses. To this end, it is only necessary to shape the outer edge 3 according to the desired shape of the frame of the eyeglasses or sunglasses. Alternatively, and within the scope of the present disclosure, the ophthalmic article can be used for goggles, visual visors, etc.

[0058] In Figure 1 and Figure 2 , the light incident on the ophthalmic article 1 as well as representing the eye 7 of the user is illustrated by the arrow 5. The field of view 13 is thus located on one side of the arrow 5 and the user looks through the ophthalmic article 1 with his eye 7.

[0059] The ophthalmic article 1 refers to a corrective or non-corrective lens (piano lens), finished or semi-finished, suitable for being mounted in a frame, for example an eyeglass frame, goggles, a mask or a visor intended to be placed in front of the eye and to form a screen of visual protection.

[0060] The ophthalmic article 1 comprises at least one layer or substrate (see for example Figure 3 ).

[0061] With regard to the example illustrated in Figure 1 and Figure 2 , the ophthalmic article 1 intended to be decorated has a first layer 9 (front layer) and a second layer 10 (back layer). One or several third layers 15 can be sandwiched between the first layer 9 and the second layer 10.

[0062] At this stage, the ophthalmic article 1 which has not yet been submitted to deposit the thin layers forming the interference mirror can be considered as a lens blank element.

[0063] In this case, the treatments conferring the additional functions of the following non-exhaustive list, alone or in combination, are not considered as additional layers: shockproof, scratchproof, wearproof, anti-reflective on the surface of the lens opposite to the one intended to be decorated, stainproof, fogproof, antistatic. These additional functions can be performed according to conventional methods (immersion, vacuum deposition, spin coating, spray, etc.).

[0064] Several of these treatments can be applied before the deposition of the thin layer of interference mirror on the front or back face of the ophthalmic article 1, after which the other treatments are applied.

[0065] The first layer 9 is for example made of a plastic material, thermoset or thermoplastic, in particular of polyamide (PA), for example nylon or polycarbonate.

[0066] The first layer has a back face 9R oriented towards the eye 7 of the user and a front face 9F oriented towards the visual field 13 of the user. The thickness of the first layer 9 is for example comprised between 0.05 mm and 1 mm or even 5 mm, preferably between 0.1 mm and 0.8 mm, preferably between 0.15 mm and 0.5 mm, for example 0.18 mm.

[0067] In particular, the front face 9F should be decorated via the method at the beginning of the application.

[0068] The second layer 10 is for example also made of a plastic material, thermoset or thermoplastic, in particular of polyamide (PA), for example nylon or polycarbonate.

[0069] The second layer 10 has a back face 10R oriented towards the eye 7 of the user and a front face 10F oriented towards the visual field 13 of the user. The second layer 10 has a thickness for example comprised between 0.05 mm and 1 mm or even 6 mm, preferably between 0.05 mm and 0.8 mm, preferably between 0.1 mm and 0.5 mm, for example 0.15 mm. In that case, the ophthalmic article can be an optical film, dedicated to be applied on or in a lens. Alternatively, the second layer 10 has a thickness for example comprised between 0.5 mm and 5 mm, preferably between 1 mm and 4 mm, most preferably between 1.4 mm and 4 mm or even between 1.5 mm and 3 mm. In that case, the ophthalmic article can be an ophthalmic lens.

[0070] However, other thicknesses of the layers 9 and 10 can be chosen depending on the function of the optical correction of the ophthalmic article 1 for example. In particular, if an optical correction is desired, one of the layers 9 and 10 can have a non-uniform thickness so that its front face has a different curvature than its back face.

[0071] As Figure 1 and Figure 2As can be seen, compared to the second layer 10 deployed closer to the user's eye 7, the first layer 9 is deployed closer to the user's field of vision 13.

[0072] The optional third layer 15 may be made of, for example, a polarizing layer, particularly of linearly polarizing polyvinyl alcohol disposed between the first layer 9 and the second layer 10. The thickness of the third layer 15 may be between 0.01 mm and 1 mm, preferably between 0.02 mm and 0.2 mm, for example, 0.05 mm or 0.07 mm.

[0073] The third layer 15 has a back 15R oriented toward the user's eyes 7 and a front 15F oriented toward the user's field of vision 13.

[0074] When assembled, for example by thermoforming or injection molding, the back side 9R of the first layer 9 contacts the front side 15F of the third layer 15 and the back side 15R of the third layer 15 contacts the front side 10F of the second layer 10.

[0075] As shown in the figure, the second layer 10 may include a first sublayer 10A made of polyamide and a second sublayer 10B made of polyamide and deployed downstream of the first sublayer. The second sublayer 10B has a thickness, for example, between 0.5 mm and 5 mm, preferably between 1 mm and 4 mm, most preferably between 1.4 mm and 4 mm, or even between 1.5 mm and 3 mm.

[0076] One of the first sublayer 10A or the second sublayer 10B, particularly the first sublayer 10A, is colored by adding pigments or colorants, while the other sublayer, particularly the sublayer 10B closest to the user's eye, is a colorless crystalline sublayer. In this case, the pigments or colorants are chosen to filter out a portion of the incident spectrum. Alternatively, the second layer does not contain two sublayers and is either completely transparent or completely colored.

[0077] This arrangement is meaningful, for example, when the third layer 15 is merely a polarizing layer and the first sublayer 10A is then configured as a filtering layer, which filters, for example, a specific wavelength or wavelength range or according to a prescribed spectrum in order to meet the requirements of a standard, such as the international standard ISO 12312 concerning eye protection, particularly sunglasses.

[0078] In this case, the back surface 10R of the second layer 10 can be surface-finished to correct optical effects.

[0079] about Figure 3 In a further, simpler alternative shown, the ophthalmic article 1 may omit either the second layer 10 or the optional third layer 15. Therefore, the ophthalmic article 1 of this alternative primarily comprises a first layer 9A.

[0080] The substrate 9A has a thickness for example comprised between 0.5 mm and 5 mm, preferably between 1 mm and 4 mm, most preferably between 1.4 mm and 4 mm or even between 1.5 mm and 3 mm.

[0081] The disclosure described in relation with the layer 9, the second layer 10 or the second sub-layer 10B can be applied mutatis mutandis to the substrate 9A. In this embodiment, the ophthalmic article is in particular a plano lens, i.e. a lens considered as having no optical power. In another embodiment, the back face 9R of the substrate 9A can be surface finished to obtain a corrective effect.

[0082] The substrate 9A is for example made of a plastic material, a thermoset or thermoplastic plastic material, in particular a polyamide (PA), for example nylon or polycarbonate. The substrate 9A can be transparent, colored or partially colored.

[0083] In this case, a treatment conferring an additional function can also be applied.

[0084] Turning to Figure 4 , an example of an embodiment of a method for at least partially decorating an ophthalmic article 1 is shown.

[0085] In step 302, an ophthalmic article 1 as shown in Figure 5 is provided, the ophthalmic article 1 having a substrate (first layer 9), a first outer surface 9F of the substrate being intended to be oriented towards the visual field 5 of the user.

[0086] Figure 5 The ophthalmic article 1 of Figure 1 differs from the ophthalmic article 1 of Figure 2 in that the outer surface, the front face 9F presents at least one decorated zone 30 at a distance of at least 15 mm, in particular 20 mm from the central axis 32 of the ophthalmic article 1, the central axis 32 being marked with “X” in Figure 7 .

[0087] In general, the zone to be decorated is located outside the central vision zone 35 of the ophthalmic article 1. The central vision zone is defined as a circular or elliptical zone of about 15 mm or even 20 mm around the central axis 32 of the ophthalmic article 1. Optionally, when the ophthalmic article is mounted in a pair of glasses which is then worn by the user, the decorated zone is at a distance of at least 15 mm or even 20 mm from the position in the eye which corresponds to the intermediate position of the pupil of the eye of the user. Indeed, in most cases, the ophthalmic lens is mounted in a spectacle frame so that the optical center of the lens is located in front of the intermediate position of the pupil of the eye of the user when the glasses are worn by the user.

[0088] As shown in Figure 5 , the front face 9F has a topography 40. The topography 40 can be considered as having been obtained by the decoration of the ophthalmic article 1, for example in relation withFigure 1-3 The described ophthalmic article generates "spontaneous surface defects" on the first outer surface 9F. At least one dimension of the length "L" of the topography 40, in itself and not as a whole, is greater than or equal to 1 mm to form a decorative pattern. This means that there is at least one "spontaneous surface defect" which is a portion of the topography 40 having at least one length dimension greater than or equal to 1 mm.

[0089] In the present example, the topography 40 comprises ribs 42 and grooves 44 alternating in cross-section. However, the front face 9F of the ophthalmic article 1 can display only ribs, or only grooves, or other pattern combinations with a base pattern, for example repeating itself in the decorative zone 30. The ribs 42 and grooves 44 have a length of at least 1 mm.

[0090] Figure 5-1 Figures 5-2, 5-3 and 5-4 show examples of topographies 40, in particular ellipses Figure 5-1 ), stars Figure 5-2 ), rectangles Figure 5-3 ) and curves Figure 5-4 ) having one length dimension L.

[0091] As shown in Figure 5-5 , the width w of such ribs 42 or grooves 44 can be in the range 10-400 pm, more particularly between 50-200 pm.

[0092] In the case where the topography 40 is for example a standing or tessellated pyramid or convex circle, the length dimension L as well as the width dimension w are determined with respect to the extension / footprint on the front face 9F.

[0093] The topography 40 comprises at least one geometric form, for example in the following group: straight line, curve, pyramid, needle.

[0094] The height h / depth d variation profile, as shown in Figure 5-5 , is greater than 20 pm and less than 200 pm, in particular less than 100 pm, with respect to the average first outer surface front face 9F.

[0095] The topography 40 comprises at least one periodic pattern, for example repeating itself at least several times on the front face 9F.

[0096] The topography 40 on the front face 9F of the ophthalmic article 1 can be achieved by different techniques, for example implying mechanical, optical, chemical or molding techniques. The starting point can be an ophthalmic article described in relation with Figure 1-3 .

[0097] One possible technique comprises the use of a laser, in particular in relation with Figures 1 to 3The topological structure 40 is mechanically or optically engraved with a laser on the front 9F of the described polished ophthalmic article 1.

[0098] Another technology might mean 3D printing technology, such as using a 3D printer, in order to specifically address issues related to... Figures 1 to 3 The polished ophthalmic article 1 described herein has ribs 42 deposited on its front surface 9F, which are made of the same material as layer 9.

[0099] In other cases, the technology may be included, particularly regarding... Figures 1 to 3 The described polished ophthalmic article 1 has heated metal wires or grids, particularly precious metals such as silver or gold, deposited in the area 30 to be decorated on the front 9F. These wires will locally melt or soften the plastic material of the 9th layer, thus creating spontaneous surface defects. One possibility is to withdraw the heated metal wires. This technique is similar to thermoforming. Another possibility is that the metal wires will remain embedded in the front 9 and will contribute to creating a unique reflective effect on the finished ophthalmic article.

[0100] exist Figure 8 The figure also illustrates another technology that is well-suited for mass production, showing an injection molding apparatus 60 or injection mold including a cavity 62 and a punch 64.

[0101] Molds 62 and 64 are made of polished metal, for example.

[0102] The cavity 62 is prepared and includes a female mold 68 with a topological structure 40 in the area 66 corresponding to the area to be decorated 30, such as a groove for forming a rib or a rib for forming a groove.

[0103] Therefore, prior to step 302, in optional step 300, the method may include the step of injecting molded ophthalmic article 1 into molding apparatus 60.

[0104] The mold portion configured to form the first outer surface (front 9F), in this case the cavity 62, includes a negative topology 40 that forms a positive decorative pattern on the first outer surface, i.e. the front 9F.

[0105] According to one embodiment, the mold portion 62 is an interchangeable mold insert that presents a negative topological structure and forms a positive decorative pattern on the first outer surface, i.e., the front surface 9F.

[0106] Return to Figure 4 After step 302, the method includes depositing, on the first outer surface, front side 9F, such as Figure 6The step 304 of the thin layers 50 shown in the middle. These thin layers 50 have a refractive index different from the refractive index of the substrate (layer 9) to form an interference mirror 62 on top of the first outer surface, i.e. the front face 9F. The interference mirror is in particular designed to reflect light in the visible domain, in particular between 450 nm and 680 nm.

[0107] The thin layers 50 forming the interference mirror 62 are deposited for example by PVD or CVD. The interference mirror 62 in particular comprises between two and six thin layers 50.

[0108] The thin layers 50 can comprise for example alternating layers of Si02and Ti203, the Si02layers having a thickness of for example 70-250 nm and the Ti203layers having a thickness of for example 40-80 nm. Other materials known to the person skilled in the art can be used instead, such as ITO, Ta205, Zr02, Ti305. Typically, the thickness of the interference mirror 62 is less than 1 pm, for example less than 0.5 pm.

[0109] The deposited thin layers 50 will conform to the shape of the topography 40. Thus, at the level of the ribs 42, the layers 50 will also form longitudinal protrusions 54 in a similar form as the ribs 42, and at the level of the grooves 42, the layers 50 will also form longitudinal valleys 56 in a similar form as the grooves 42.

[0110] This will modify the optical transfer function of the interference mirror 52 in the decorative zone 30 with respect to a smooth polished surface without these spontaneous defects. The topography 40 is thus reproduced to some extent by the thin layers 50 and creates an interference decorative pattern in the decorative zone 30.

[0111] In general, the topography 40 has a height h / depth d variation profile larger than the total thickness of the interference mirror 62 (stack of all thin layers 50) with respect to the average first outer surface, i.e. the front face 9F. This means that the height h, the depth d or the sum (d+h) is larger than the total thickness of the interference mirror 62.

[0112] Figure 7 A top view is shown of an example of a decorated ophthalmic article 1, for example a pair of sunglasses, whose decorative zone 30 is located outside the central vision zone 35 of the ophthalmic article 1, in particular above the central vision zone 35 of the user.

[0113] In this case, the topography 40 is formed of ribs 42 or grooves 42 organized in a grid pattern.

[0114] Figure 9 and Figure 10 A top view is shown of another example of a decorated ophthalmic article 1, for example a pair of sunglasses, whose decorative zone 30 is formed in a band, said decorative zone 30 being located outside the central vision zone 35 of the ophthalmic article 1, in particular above the central vision zone 35 of the user.

[0115] In this case, the topological structure 40 is formed as ribs 42 or grooves 42 organized in a honeycomb.

[0116] Figure 11 Another example of a decorated ophthalmic article 1 is shown.

[0117] In this case, the topological structure 40 is formed as ribs 42 or grooves 42 organized in a double diamond pattern, where a first meta straight line pattern is formed by the grooves or ribs forming a first diamond topological structure 40 and a second smaller diamond pattern is turned 90° inside each meta pattern, similar to a leaf.

[0118] Therefore, the method described here above provides very extensive decoration possibilities at limited cost and is easy to manufacture at an industrial level.

Claims

1. A method for decorating an ophthalmic article (1), comprising the steps of: providing an ophthalmic article (1) having a substrate (9) with a first outer surface (9F) intended to be oriented towards the visual field (5) of a user and presenting at least one decoration zone (30) outside a central vision zone (35) of the ophthalmic article (1), and having on the first outer surface (9F) in the at least one decoration zone (30) at least one topography (40) for forming a decorative pattern having a length dimension greater than or equal to 1 mm, depositing on the first outer surface (9F) a thin layer (50) having a refractive index different from that of the substrate (9) to form on top of the first outer surface (9F) an interference mirror (52), wherein the interference mirror (52) is adapted to reflect light in the visible domain, wherein the topography (40) has a height / depth variation profile with respect to the average first outer surface greater than the total thickness of the interference mirror (52).

2. The method according to claim 1, wherein the topography (40) comprises ribs (42) and / or grooves (44) having a width comprised in the range 10-400 pm.

3. The method according to claim 2, said width being comprised between 50-200 pm.

4. The method according to any one of claims 1-3, wherein the topography (40) comprises at least one geometric form from the group: straight line, curved line, pyramid, needle.

5. The method according to any one of claims 1 or 4, wherein the topography (40) has a height / depth variation profile with respect to the average first outer surface (9F) greater than 20 pm and less than 200 pm.

6. The method according to claim 5, said height / depth variation profile with respect to the average first outer surface (9F) being less than 100 pm.

7. The method according to any one of claims 1 to 6, wherein the topography (40) comprises at least one periodic pattern.

8. The method according to any one of claims 1 to 7, wherein providing the ophthalmic article (1) comprises the step of injection molding the ophthalmic article (1) in a mold (60), wherein the mold portion (62) configured to form the first outer surface (9F) comprises a negative topography (40) forming on the first outer surface (9F) a positive decorative pattern.

9. The method according to claim 8, wherein the mold portion (62) configured to form the first outer surface comprises an interchangeable mold insert presenting a negative topography forming on the first outer surface (9F) a positive decorative pattern.

10. The method according to any one of claims 1 to 7, wherein providing the ophthalmic article (1) comprises at least one or several of the following steps: engraving the topography (40), depositing ribs (42) on the first outer surface (9F) of a polished ophthalmic article (1) by 3-D printing, A heated metal wire or mesh is deposited on the first outer surface (9F) of the polished ophthalmic article (1) in a decorative zone (30).

11. The method according to any one of claims 1 to 10, wherein the thin layer (50) forming the interferometer (52) is deposited by PVD or CVD.

12. The method according to any one of claims 1 to 11, wherein the ophthalmic article (1) further comprises a polarizing layer (15).

13. An ophthalmic article manufactured according to the method of any one of claims 1 to 12.

14. The ophthalmic article according to claim 13, comprising a polarizing layer (15).

15. The ophthalmic article according to claim 13 or 14, wherein the injection-molded ophthalmic article (1) further comprises a layer of colored plastic material.

16. A pair of sunglasses comprising an ophthalmic article according to any one of claims 13 to 15, wherein the decorative zone (30) is located outside the central vision zone (35) of the ophthalmic article (1).

17. The pair of sunglasses according to claim 16, wherein the decorative zone (30) is located above the central vision zone (35) of the user.

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