Method for preparing the surface of a lens including an...

G - Physics – 02 – C

Patent

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Details

G02C 7/02 (2006.01) B24B 9/14 (2006.01) C03C 17/42 (2006.01) G02B 1/10 (2006.01) G02C 13/00 (2006.01)

Patent

CA 2699645

The invention relates to a method for processing an ophthalmic lens coated on at least one of its main surfaces with an outer hydrophobic and/or oleophobic coating, and for making it capable of undergoing an edging process, wherein said method comprises the step of processing the peripheral area of said coated main surface, which results in a removal of the hydrophobic and/or oleophobic coating and/or in a modification of said coating that lowers its hydrophobic characteristic, and the step of depositing a temporary polymeric coating on said main surface of the lens in order to cover at least partially the hydrophobic and/or oleophobic coating and the peripheral area processed during the previous step, in order to provide an ophthalmic lens having on at least one of its main surfaces an outer hydrophobic and/or oleophobic coating and, in direct contact with said hydrophobic and/or oleophobic coating, a temporary polymeric coating adhering to the surface of the coated lens. The invention also relates to an edging method and to a lens capable of undergoing an edging process.

L'invention concerne un procédé de traitement d'une lentille optique revêtue sur au moins une de ses surfaces princi-pales d'un revêtement externe hydrophobe et/ou oléophobe, destiné à la rendre apte au débordage, comprenant une étape de traitement de la région périphérique de ladite surface principale revêtue résultant en une élimination du revêtement hydrophobe et/ou oléophobe et/ou une modification de ce revêtement abaissant son caractère hydrophobe, et une étape de dépôt d'un revêtement temporaire de nature polymère sur ladite surface principale de la lentille de façon à recouvrir au moins partiellement le revêtement hydrophobe et/ou oléophobe et la région périphérique traitée dans l'étape précédente, fournissant une lentille optique comportant sur au moins une de ses surfaces principales un revêtement externe hydrophobe et/ou oléophobe et, en contact direct avec ledit revêtement hy-drophobe et/ou oléophobe, un revêtement temporaire de nature polymère adhérant à la surface de la lentille revêtue. L'invention concerne également un procédé de débordage et une lentille apte au débordage.

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