Information bearing contact lenses

Abstract

A method and system for printing information on a contact lens, comprising a substrate 203 for locating contact lenses 100 thereon; a first optical measurement device 201 configured to perform a depth

Description

[0001] The present disclosure relates to a platform architecture and process steps for imprinting information, including machine readable information, on contact lenses, as well as a contact lens bearing said information, and its use in authentication procedures involving electronic devices. BACKGROUND

[0002] In order to improve the traceability of products, machine-readable information such as barcodes, QR codes, and the like are often provided with products. For example, barcodes are often provided on a product or its packaging, or QR codes may be provided in the literature accompanying a product.

[0003] In addition, machine-readable information can be used as an extra layer of authentication method for individuals’ access to different virtual platforms or environments containing security restricted areas.

[0004] Whilst improving traceability of contact lenses and individual authentication are desirable, the material and setting of contact lenses makes the printing of machine readable information on them challenging. The inner surface of a contact lens touches the cornea of a wearer, meaning that the surface needs to be smooth, any surface roughness resulting from abrasive printing techniques would cause irritation and potentially damage to the eye. This is similarly true of the outer surface of a contact lens, which touches the wearer’s eyelids. In addition, contact lens material transparency and submergence of contact lenses in liquid solutions such as saline makes standard QR code marking methods, such as 3D printing or laser etching, unsuitable.

[0005] It is therefore desirable to provide systems and methods that address at least some of these challenges.

[0006] The contact lens traceability addresses the needs during production steps, process control, quality control as well as post-production traceability including failure and returns. SUMMARY According to a first aspect of the present disclosure, there is provided a method for printing information on contact lenses, comprising: providing a contact lens on a substrate; performing a depth detection procedure to determine the location of an inner layer of the contact lens; printing information at least in the inner layer of the contact lens determined from the depth detection procedure. Optionally, the depth detection procedure at least comprises determining an upper surface of the contact lens and a lower surface of the contact lens, and the inner layer comprises a region between the upper surface and the lower surface. By providing contact lenses with information deposited on an inner layer, traceability of the product is provided without causing irritation to the eyelid and cornea of the wearer. Moreover, the information is substantially less likely to become altered and un-readable when not located on an outer surface. Optionally, locations of the upper surface, the lower surface, and the inner layer of the contact lens comprise depth measurements along an axis perpendicular to the substrate. Optionally, X-Y coordinates in the plane of the substrate for printing the contact lens are selected to be in a flange region of the contact lens. The flange region of the contact lens, constituting an outer ring of the contact lens, is sufficiently far from the pupil region such that the information will not appear in and obstruct the wearer’s vision. Optionally, the substrate comprises an X-Y table configured to position the contact lens such that the information is printed in the flange region of the contact lens. The use of an X-Y table allows for accurate and automated positioning of contact lenses over the inspection area for carrying out the exemplary methods of the present disclosure. Optionally, the printing is performed using one or more lasers. It is found that by adjusting the focal length of the laser(s), information can be located at a desired layer position within the material of the contact lenses and therefore away from an outside surface of the contact lenses. Optionally, at least one laser is configured to emit light in green, deep ultraviolet range or the near ultraviolet range. The specific wavelength of the laser(s) may be selected based on the material of the contact lens having information located thereon. Optionally, at least one laser comprises a spot size of diameter about 1 urn. The inventors have found that this spot size at focus enables miniaturized sizes of machine readable information such as QR codes to be imprinted on contact lenses. However, other spot sizes are envisaged as being feasible and the disclosure of 1 pm is not intended to be limiting. Optionally, the method further comprises performing a quality inspection procedure on the information-bearing contact lens in order to determine if the printed information satisfies one or more predefined criteria. The inclusion of a quality inspection procedure will reduce the occurrence of poorly printed information and therefore loss of tracebility in the product resulting from information that cannot be interpreted by an appropriate device such as a QR code reader. Optionally, the depth detection procedure is performed using a laser interferometer or a confocal interferometer. Optionally, the method further comprises printing information at a second location in or on the contact lens. The printing of additional information on the contact lens may provide the additional advantage of creating multi-factor authentication and / or traceability within the contact lens itself. Optionally, the information comprises machine-readable information, including but not limited to a QR code or a barcode. Optionally, the information is selected to be used as an authentication layer of an electronic device. According to a second aspect of the present disclosure, there is provided a system for printing information on a contact lens, comprising: a substrate for locating one or more contact lenses thereon; a first optical measurement device configured to perform a depth detection procedure to determine the location of an inner layer of the contact lens; a printing module configured to print information in the inner layer of the contact lens determined from the depth detection procedure. Optionally, the substrate comprises an X-Y table configured to position the contact lens such that the information is printed in the flange region of the contact lens. Optionally, the printing module comprises one or more lasers. Optionally, at least one laser is configured to emit light in the deep ultraviolet range or the near ultraviolet range. Optionally, at least one laser comprises a spot size of about 1 pm. Optionally, the system further comprises an image capture device configured to perform a quality inspection procedure on the information-bearing contact lens in order to determine if the printed information satisfies one or more predefined criteria. Optionally, the first optical measurement device comprises a laser interferometer or a confocal interferometer. According to a further aspect of the present disclosure, there is provided a method for authenticating the user of a first electronic device, comprising: capturing, by a first image capture device of the first electronic device, an image of at least one of the user’s eyes; analyzing the captured image to identify the presence of machine-readable information in the region of the user’s eye; determining the contents of the machine-readable information; comparing the contents of the machine-readable information against the contents of a first database; in response to determining that the contents of the machine-readable information is contained in the first database, altering the state of the first electronic device or a second electronic device. Optionally, the machine-readable information is located on a contact lens on the user’s eye. The provision of an information-bearing contact lens, worn by a user of an electronic device, provides an additional sophisticated security layer for accessing the device per se or a software application contained on the device, which can be a smart phone, tablet, AR VR headset, a laptop computer, a desktop computer, doorbell camera or surveillance camera, and so on, as long as the electronic device is configured with at least a first image capture device. For example, in order to access a banking application or a list of passwords stored on a smart phone, or to access a facility with a surveillance camera at an entrance point. Optionally, altering the state of the first electronic device comprises completing an authentication layer on the first electronic device. Optionally, altering the state of the second electronic device comprises providing a notification on the second electronic device indicating that the user of the first electronic device has been authenticated. Advantageously, this provides an additional level of user authentication to a second user, for example on a video call, that the first user is indeed a real person and not an avatar such as Ai-generated character (avatar). Optionally, the information on the contact lens can be used as an authentication method to login to AR / VR user profiles and switch between platforms and applications. Optionally, the method further comprises capturing, by the first image capture device or a second image capture device of the first electronic device, eye-tracking data corresponding to the user. The eye-tracking data of each person is unique, and therefore may be combined with the information-bearing contact lens to verify that the wearer of the contact lens is also their owner, thus providing an additional security layer. Optionally, the method further comprises: comparing the eye-tracking data of the user against the contents of the first database or a second database; and using the eye-tracking data in conjunction with the contents of the machine-readable information to authenticate the user. Optionally, the method further comprises using the machine-readable information in conjunction with the eye tracking data of an individual recorded to generate a unique authentication code for a specific individual. Optionally, the information encoded in the machine-readable information comprises an ID number, a name, a military regiment, a blood type and / or a Religion. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1: Contact Lens with QR Code imprinted laterally in the inner layer of the material. Therefore, both inner and outer surfaces of the contact lens are intact.

[0008] Figures 2A-C illustrate a platform architecture and process steps for imprinting machine readable information on a batch of contact lenses placed Face-Down on a career. The contact lenses are submerged in liquid, such as but not limited to a saline solution.

[0009] Figure 2A illustrates a process of material stack depth detection using a first optical measurement device 100, such as a laser interferometer module or a confocal interferometer 100.

[0010] Figure 2B illustrates a process of focusing the laser of the laser marking module 101 on the area of interest based on the detected depth in Figure 2A. Then imprinting the QR Code on the flange of the contact lens.

[0011] Figure 2C illustrates a laterally imprinted QR Code on the flange of the contact lens and its inspection.

[0012] Figure 3 illustrates a platform architecture and process steps for imprinting QR Code on a batch of contact lenses placed Face-Up on a career. The contact lenses are submerged in liquid such as but not limited to a saline solution.

[0013] Figure 4 illustrates a top view of the array of contact lenses depicted in Figures 2A-C and 3.

[0014] Figure 5 illustrates an authentication process utilising machine readable information on a contact lens according to embodiments of the present disclosure.

[0015] Figure 6 illustrates a multi-factor authentication process combining machine readable information from a contact lens and the behavioral eye movement of the individual wearing the contact lens, according to embodiments of the present disclosure.

[0016] The Figures depict embodiments of the present disclosure for purposes of illustration only. DETAILED DESCRIPTION

[0017] The present disclosure will now be made with reference to the accompanying Figures. It will be appreciated that the invention of the present disclosure is not limited to the specific examples in the Figures and that alterations to various features in systems, and steps in methods, are within the ambit of the present disclosure. The term “about” used herein is defined to mean ±10%.

[0018] Referring to Figure 1, there is provided a conceptual diagram illustrating the different surface regions of a contact lens 100, namely the visual optic zone 101 constitutes a central portion of the lens surface and the flange 102 which constitutes an outer portion of the lens surface. Any machine-readable information 103 must be imprinted in the vicinity of the flange of the contact lens 100, keeping the visual optic zone 101 of the lens pristine. The machine-readable information 103 may comprise a QR code, a barcode, a data matrix code or another visual presentation of information that can be interpreted by appropriately configured computer software in conjunction with an image capture / analysis system. The machine-readable information is preferably small enough not to cause any visible optical defect on the lens. For example, in certain embodiments the greatest dimension of the machine-readable information 103 is less than or equal to about 300 pm. Contact lens traceability by QR Code will eliminate the replacement and sale of counterfeit contact lenses, and it will guarantee authenticity of the product. In addition, personalized QR codes on contact lenses can be used as part of an authentication method, for example to distinguish a deep-fake avatar vs a human user in a video call in a virtual environment using AR / VR glasses. Authentication methods involving the exemplary contact lenses are best described in relation to Figures 5 and 6.

[0019] Referring to Figure 2, there is illustrated a series of process steps (A)-(C) for printing machine-readable information on a contact lens 100. Since the contact lens inner surface is in contact with cornea and the outer layer is in contact with eyelids, to keep the inner and outer surface of the contact lens intact, the machine-readable information is imprinted laterally in an inner layer of the contact lens material between Z2 and Z3, where Z2 is an upper surface of the lens and Z3 is an lower surface of the lens.

[0020] The system depicted in Figure 2 for carrying the process steps (A)-(C) comprises first optical measurement device 201 configured to perform one or more depth detection procedures, a printing module 202 configured for forming information on a surface of a contact lens, a table 203 configured for horizontal movement in at least 2 dimensions such as an X-Y table 203 with a position sensor 204, and a vision module 205 configured to perform image capture and optionally image analysis of all or part of the table and the contents disposed thereon. The system also comprises one or more processors (not pictured) which may perform a function of controlling the various components of the system, and optionally performing certain functions of the system such as but not limited to execution of image analysis software and computation of pass / fail events during quality inspection. Non-transitory computer readable media may be provided, separate or together with the system, comprising instructions thereon for carrying out the exemplary methods of the present disclosure described in relation to the Figures.

[0021] A batch of contact lenses 100 are placed on the X-Y table 203. The contact lenses 100 may be submerged in liquid 206 such as but not limited to a saline solution. In such embodiments, Z1 is the top surface of the liquid 206, and Z4 is the bottom surface of the liquid 206. Identification of lens top and bottom surfaces Z2, Z3 is important in the context of embodiments involving liquid 206 submersion of the contact lenses 100 as not all contact lenses will be stabilize at the same vertical position in the their slot on the X-Y table 203. However, the inventors envisage that all of the process steps in the present disclosure could also be performed in a dry environment in the absence of the liquid solution, though this is less common.

[0022] In order to identify the inner layer of the contact lens 100 material, the first optical measurement device 201 configured to perform depth detection measurements is used. In various embodiments, the first optical measurement device 201 comprises an interferometer, such as but not limited to a laser interferometer module 201 or a confocal interferometer 201.

[0023] The average horizontal diameter of the human cornea is approximately 11.5 to 12 mm, while the vertical diameter is slightly smaller at around 10.5 to 11 mm. The size of the pupil (the opening within the iris) can vary widely, typically ranging from 2 to 4 mm in diameter under bright light, and can dilate to 4 to 8 mm in dim light. This means that in preferred embodiments, in order to make sure that the imprinted information is outside the pupil area the information should be imprinted within about 2mm of the edge of a contact lens.

[0024] Step (A) in Figure 2 illustrates a preliminary step of material stack depth detection using the first optical measurement device 201. The depth levels may be defined as follows: Z1 is the top liquid 206 surface, Z2 is the upper surface of the lens 100, Z3 is the lower surface of the lens 100, and Z4 is the bottom surface of the liquid 206. An initial calibration process starts with homing the system to its global reference coordinates Rx, Ry, Rz. The reference coordinates could be any set of predefined values, such as but not limited to a corner of the container cell under inspection defined to be (0,0,0). The first optical measurement device 201 then scans each container cell in the X and Y directions to determine an X-Y position that is within about 2mm of the edge of the contact lens 100, performs the depth detection procedure in the Z direction to identify Z1-Z4 at the appropriate X-Y position, and registers the map of relative Z coordinates of the contact lens 100 with respect to reference coordinates of Rx, Ry, Rz. In some embodiments, the first optical measurement device 201 performs a scan in a raster pattern within each container cell on the X-Y table 203, but performs a scan in a line pattern between cells for the whole array.

[0025] In addition or alternatively, the vision module 205 may identify the lateral area of interest and the XY table 203 positions it under the printing module 101 using coordinates provided by the position sensor 204. The vision module 205 may comprise any appropriately configured optical device for image capture and analysis in the setting of contact lens manufacture.

[0026] In preferred embodiments, the X-Y coordinates for each contact lens 100 in the array are predefined by the position sensor 204 to be the same as the lenses 100 are effectively prevented from substantial X-Y movement by the slots they are contained in.

[0027] Then printing module 202 uses the Zl-4 coordinates registered to autofocus on the area of interest based on the detected depth in step (A). As presented in step (B), the printing module 202 imprints the information on the flange of the contact lens 100 between Z2 and Z3. The information can be located generally between Z2 and Z3. The information is preferably, though not essentially, located at a lateral center line between Z2 and Z3. The printing module 202 preferably comprises a laser marking module 202. In some embodiments the laser marking module 202 is configured to emit light in the DUV or NUV range with a spot size of around 1 micrometer.

[0028] In Step (C), the vision module 205 performs an inspection on the quality of the imprinted machine-readable information and decides on a pass / fail criteria based on the readability of the imprinted machine-readable information 103 to within a pre-defmed margin of error. In some embodiments, this is done by comparing the string of information fed to the printing module 202 as an input and the string of information received from the vision module 205. The two strings should be identical, or near-identical to within the predefined margin of error.

[0029] Then the X-Y table 203 moves the next contact lens 100 in the X-Y table 203 under the operation area. The steps (A)-(C) can then be repeated. This loop will continue until the entire batch of contact lenses 100 is done.

[0030] In some embodiments, multiple pieces of information 103 can be imprinted on the same lens 100, at the same or different vertical levels within the contact lens 100 material, for complex multi-step traceability. In addition, multiple pieces of information can be imprinted at the same or different vertical levels within the contact lens 100 material, each with its own level of unique security access for varying levels of information security as needed, both encrypted and unencrypted. This type of contact lens 100 can be called an ‘Information-Bearing Contact Lens’.

[0031] Alternatively, a single machine-readable imprint 103 can hold two sets of public versus encrypted information. The public information may be readable by publicly available machine-readable code readers, such as QR Code readers, and encrypted information readable using a dedicated software application or by medical professionals or government staff / agencies. A contact lens 100 with a single piece of machine-readable code 103 and with two or more levels of encryption is another type of ‘Information Bearing Contact Lens’.

[0032] Referring to Figure 3, there is illustrated an alternative embodiment in which the printing of the machine readable information 103 is performed on the contact lenses 100 placed Face-Up. The same steps illustrated in Figure 2 steps (A)-(C) can be performed in the Face-Up position.

[0033] Figure 4 illustrates a top view of the contact lens 100 array depicted in Figures 2A-C and Figure 3. Because it is preferred to imprint the information 103 within a predefined distance of the edge of the contact lenses 100, the X-Y coordinates can be predefined with respect to global coordinates Rx, Ry.

[0034] Referring to Figure 5, a contact lens 100 prepared with machine-readable information 103 provides a useful mechanism for authenticating a user of an electronic device (not pictured), such as a smart phone, tablet, AR VR headset, a laptop computer, a desktop computer, doorbell camera or surveillance camera, and so on, as long as the electronic device is configured with at least a first image capture device. For example, the machine-readable information 103 may include personal identifying information, a unique serial code corresponding to a real person, or the like. In a first step 510, a first electronic device being used by the user may capture an image of at least one of the user’s eyes. In a second step 520, the captured image may be analyzed to identify the presence of machine-readable information in the region of the user’s eye. The image analysis may be performed by one or more software applications on the first electronic device, or by one or more software application(s) remotely located from the first electronic device. It is not essential for the software application(s) to identify the presence of a contact lens, though in some embodiments this may provide an additional security layer and it is envisaged that this could be included in the process.

[0035] In a third step 530, the contents of the machine-readable information 103 may be determined by the one or more software applications, and in a fourth step 540 compared against the contents of a first database that is either local or remote to the first electronic device. For example, the contents of the machine-readable information may comprise a unique string of data corresponding to one real person, and this may be checked against a list of unique string of datas in the first database. In a fifth step 550, in response to determining that the contents of the machine-readable information is contained in the first database, the state of the first electronic device, or of a second electronic device, may be altered.

[0036] In embodiments, altering the state of the first electronic device comprises completing an authentication layer on the first electronic device. It is likely that the wearer of the contact lens containing the machine-readable information is the same person as the one who is associated with the identifying information encoded by the machine-readable information, thus providing an additional security layer for accessing the first electronic device or a software application contained thereon. Optionally, the comparison of the information with the contents of the first database may also include cross-checking if the person corresponding to the said information on the machine-readable information is intended to have access to the first electronic device. This may involve checking a second database for a mapping of the person corresponding to the said information with the first electronic device. If such a mapping is not located, the first electronic device may cause the authentication layer to fail.

[0037] In other embodiments, altering the state of the second electronic device comprises providing a notification on the second electronic device indicating that the user of the first electronic device has been authenticated. This may be useful in the instance of a video call interaction between the user of the first electronic device and a user of the second electronic device, to confirm for the user of the second electronic device that the user of the first electronic device is indeed present and a real person, and that they are not interacting with an avatar such as an Ai-generated avatar.

[0038] In additional embodiments, it may be preferable to verify that the wearer of the contact lens corresponds to the actual owner of the contact lens, to ensure that the contact lens has not been stolen and worn by a malicious party intent on passing themselves off as the actual owner. Eye-tracking data for all human beings is unique, and therefore can be treated as a type of unique, personal identifying information. The method of Figure 6 is similar to the method of Figure 5, but additionally comprises capturing 610 eye-tracking data of the user of the first electronic device. The eye tracking data may be captured by the same or a second image capture device of the first electronic device. The eye-tracking data may then be compared against the first or a second database, and a cross-check 620 may be performed to determine if the identity of the owner of the contact lens corresponds to the identity of the person whose eye-tracking data has been captured, based on the machine-readable information and the eye-tracking data. If no result, or a non-matching result, is retrieved from the cross-checking, the authentication layer may fail. If the result is a match, then the authentication layer is passed. Combining eye-tracking data and the contact lenses with machine-readable information may augment the strength of the authentication procedure, by refusing access to a malicious party that is wearing contact lenses that do not belong to them in order to pass themselves off as the true owner.

[0039] A user may generate a unique authentication code for associated with their eye-tracking data by using a software application appropriately configured with AI algorithms to track eye movements and identify patterns and other key parameters associated with their eyes. The unique authentication code may be generated and stored in the first or a second database for retrieval during the authentication process of Figure 6.

Claims

WHAT IS CLAIMED IS:

1. A method for printing information on contact lenses, comprising: providing a contact lens on a substrate;performing a depth detection procedure to determine the location of an inner layer of the contact lens;printing information at least in the inner layer of the contact lens determined from the depth detection procedure.

2. The method of claim 1, wherein the depth detection procedure at least comprises determining an upper surface of the contact lens and a lower surface of the contact lens, and the inner layer comprises a region between the upper surface and the lower surface.

3. The method of claim 2, wherein locations of the upper surface, the lower surface, and the inner layer of the contact lens comprise depth measurements along an axis perpendicular to the substrate.

4. The method of claims 1-3, wherein X-Y coordinates in the plane of the substrate for printing the contact lens are selected to be in a flange region of the contact lens.

5. The method of claim 4, wherein the substrate comprises an X-Y table configured to position the contact lens such that the information is printed in the flange region of the contact lens.

6. The method of claims 1-5, wherein the printing is performed using one or more lasers.

7. The method of claim 6, wherein at least one laser is configured to emit light in the deep ultraviolet range or the near ultraviolet range.

8. The method of claim 6 or claim 7, wherein at least one laser comprises a spot size of about 1 pm.

9. The method of claims 1-8, further comprising performing a quality inspection procedure on the information-bearing contact lens in order to determine if the printed information satisfies one or more predefined criteria.

10. The method of claims 1-9, wherein the depth detection procedure is performed using a laser interferometer or a confocal interferometer.

11. The method of claims 1-10, further comprising printing information at a second location in or on the contact lens.

12. The method of claims 1-11, wherein the information comprises machine-readable information.

13. The method of claim 12, wherein the machine readable information comprises a QR code, or a barcode.

14. The method of claim 12 or claim 13, wherein the information is selected to be used as an authentication layer of an electronic device.

15. A system for printing information on a contact lens, comprising:a substrate for locating one or more contact lenses thereon;a first optical measurement device configured to perform a depth detection procedure to determine the location of an inner layer of the contact lens;a printing module configured to print information in the inner layer of the contact lens determined from the depth detection procedure.

16. The system of claim 12, wherein the substrate comprises an X-Y table configured to position the contact lens such that the information is printed in the flange region of the contact lens.

17. The system of claim 12 or 13, wherein the printing module comprises one or more lasers.

18. The system of claim 15, wherein at least one laser is configured to emit light in the deep ultraviolet range or the near ultraviolet range.

19. The system of claim 15 or claim 16, wherein at least one laser comprises a spot size of about 1 pm.

20. The system of claims 12-17, further comprising an image capture device configured to perform a quality inspection procedure on the information-bearing contact lens in order to determine if the printed information satisfies one or more predefined criteria.

21. The system of claims 12-18, wherein the first optical measurement device comprises a laser interferometer or a confocal interferometer.

22. A contact lens prepared with printed information according to the method of claims 1-14.

23. A non-transitory computer readable medium comprising instructions thereon for carrying out the method of claims 1-14.

24. A method for authenticating the user of a first electronic device, comprising: capturing, by a first image capture device of the first electronic device, an image of at least one of the user’s eyes;analyzing the captured image to identify the presence of machine-readable information in the region of the user’s eye;determining the contents of the machine-readable information;comparing the contents of the machine-readable information against the contents of a first database;in response to determining that the contents of the machine-readable information is contained in the first database, altering the state of the first electronic device or a second electronic device.

25. The method of claim 25, wherein the machine-readable information is located on a contact lens on the user’s eye.

26. The method of claim 24 or claim 25, wherein altering the state of the first electronic device comprises completing an authentication layer on the first electronic device.

27. The method of claim 24 or claim 25, wherein altering the state of the second electronic device comprises providing a notification on the second electronic device indicating that the user of the first electronic device has been authenticated.

28. The method of claim 23, when the information on contact lens can be used as authentication method to login to AR / VR user profiles and switch between platforms and applications.

29. The method of claims 24-28, further comprising capturing, by the first image capture device or a second image capture device of the first electronic device, eye-tracking data corresponding to the user.

30. The method of claim 29, further comprising:comparing the eye-tracking data of the user against the contents of the first database or a second database; andusing the eye-tracking data in conjunction with the contents of the machine-readable information to authenticate the user.

31. The method of claim 29 or claim 30, further comprising using the machine-readable information in conjunction with the eye tracking data of an individual recorded to generate a unique authentication code for a specific individual.

32. The method of claim 1, wherein the information encoded in the machine-readable information comprises an ID number, a name, a military regiment, a blood type and / or a Religion.Application No: GB2412409.1Claims searched: 1-23 and 32Examiner: Marc CollinsDate of search: 24 February 2025Patents Act 1977: Search Report under Section 17Documents considered to be relevant:Category Relevant to claims Identity of document and passage or figure of particular relevance X 1-23 and 32 JP 2002303829 A (SEIKO EPSON CORP.) See whole document especially WPI Abstract Accession No. 2003-034197; paragraph [0043] and figures. X 1-23 and 32 US 7267436 B2 (ITO et al.) See whole document especially claims 1, 5, 7 and figures. A,E - WO 2024 / 177537 Al (ERICSSON TELEFON) A - CN 20589917 U (GUANGZHOU G&G CONTACT LENS CO. LTD.) A - US 2006 / 0001828 Al (DUGGAN et al.) A - WO 2018 / 176878 Al (GUANGZHOU NEW CKLASER CO. LTD.) A - US 2021 / 0308797 Al (ASAOKA et al.)Categories:v Au Document indicating lack of novelty or inventive step A Document indicating technological background and or state of the art. Y Document indicating lack of inventive step if combined with one or more other documents of same category. p Document published on or after the declared priority date but before the filing date of this invention. & Member of the same patent family E Patent document published on or after, but with priority date earlier than, the filing date of this application.Field of Search:The following online and other databases have been used in the preparation of this search reportSEARCH-PATENTInternational Classification:Subclass Subgroup Valid From B41M 0005 / 24 01 / 01 / 2006 B29C 0059 / 16 01 / 01 / 2006 B29D 0011 / 00 01 / 01 / 2006 B41J 0003 / 407 01 / 01 / 2006 G02B 0001 / 04 01 / 01 / 2006 G02C 0007 / 02 01 / 01 / 2006

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