Method for making contact lenses having uv absorbing properties

Details Method for making contact lenses having uv absorbing properties Method for making contact lenses having uv absorbing properties

G - Physics

02

B

G02B 1/04 (2006.01) C07D 249/20 (2006.01) C08F 220/36 (2006.01) C08F 220/60 (2006.01)

Patent

CA 2329537

A method for preparing a lens having UV-absorbing properties involves charging to a mold a monomer mixture comprising lens-forming monomers and an essentially non-UV-absorbing compound, and curing the monomer mixture to form a lens, followed by treating the lens to convert the essentially non-UV-absorbing compound to a UV-absorbing agent.

L'invention porte sur un procédé d'obtention de lentilles absorbant les UV consistant à charger dans un moule un mélange de monomères devant constituer la lentille ainsi qu'un composé essentiellement non absorbant des UV, puis à le faire durcir pour former la lentille laquelle est ensuite traitée pour transformer le composé essentiellement non absorbant des UV en agent absorbant les UV.

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