METHOD FOR TREATING A LENS APT TO TRIMMING

摘要

A method for treating an ophthalmic lens comprising two main sides, wherein at least one side comprises an organic or mineral external layer coated with a MgF2 temporary protective layer, said method comprising a specific treating step selected amongst the following steps: - a liquid phase chemical treatme nt of the temporary protective layer, leading to the formation of MgO and/or Mg(OH)2 on the temporary protective layer,- a deposit of at least one non fluorinated metallic oxide and/or of at least one non fluorinated metallic hydroxide on the temporary protective layer through transfer thereof from an electrostatic film or through vacuum evaporation thereof directly on the temporary protective layer,- the deposit of the MgF2 temporary protective layer on the external layer occurs through vacuum evaporation at a speed low er than or equal to 0.5 nm/s.