WO2025243218 - METHOD FOR MAKING CENTRALLY COLORED CONTACT LENSES
National phase entry is expected:
Publication Number
WO/2025/243218
Publication Date
27.11.2025
International Application No.
PCT/IB2025/055269
International Filing Date
21.05.2025
Title **
[English]
METHOD FOR MAKING CENTRALLY COLORED CONTACT LENSES
[French]
PROCÉDÉ DE FABRICATION DE LENTILLES DE CONTACT COLORÉES AU CENTRE
Applicants **
ALCON INC.
Inventors
PLAVNIK, Michelle
BREITKOPF, Richard Charles
CHANG, Ya-Wen
ZHANG, Steve Yun
JING, Feng
Priority Data
63/650,759
22.05.2024
US
Application details
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International Searching Authority |
EPO
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| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
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| Applicant's Legal Status |
Legal Entity
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| Translation |
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* The data is based on automatic recognition. Please verify and amend if necessary.
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 3240 | |
| EPO | Filing, Examination, Granting | 29161 | |
| Japan | Filing, Examination, Granting | 3325 | |
| South Korea | Filing, Examination, Granting | 4335 | |
| USA | Filing, Examination, Granting | 11140 |
Total:
51,201
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Abstract[English]
Described herein is a method for producing centrally colored silicone hydrogel contact lenses. The method comprises a step of cast molding of a lens-forming composition including a hydroxyl-containing polymerizable component to form an unprocessed silicone hydrogel contact lens having hydroxyl groups covalently incoporated into its polymer matrix and steps of applying and fixing a reactive dye to the polymer matrix only in its central circular region concentric with the central axis of the unprocessed silicone hydrogel contact lens. The obtained centrally colored silicone hydrogel contact lens has a central circular region that is only colored to selectively filter radiations of certain wavelengths, e.g., HEVL.[French]
L'invention concerne un procédé de production de lentilles de contact en hydrogel de silicone colorées au centre. Le procédé comprend une étape de moulage par coulée d'une composition de formation de lentille comprenant un composant polymérisable contenant un hydroxyle afin de former une lentille de contact en hydrogel de silicone non traitée ayant des groupes hydroxyle incorporés de manière covalente dans sa matrice polymère et des étapes d'application et de fixation d'un colorant réactif à la matrice polymère uniquement dans sa région circulaire centrale concentrique à l'axe central de la lentille de contact en hydrogel de silicone non traitée. La lentille de contact en hydrogel de silicone colorée au centre obtenue présente une région circulaire centrale qui est uniquement colorée pour filtrer sélectivement des rayonnements de certaines longueurs d'onde, par exemple, la HEVL.