Patent ID: 8182866

Claim:
A method for producing an ophthalmic lens coated with a mesoporous layer having a refractive index that is stable over time comprising: (a) the preparation of a precursor sol of a mesoporous layer containing a precursor agent further defined as a compound with the formula: M(X) 4 (I) wherein, X is a hydrolysable group and M represents silicon or a tetravalent metal and mixtures of these; at least one organic solvent; at least one pore forming agent; and water, and optionally a catalyst for the hydrolysis of the X groups; (b) depositing a film of the precursor sol on a main surface of the ophthalmic lens and the formation of the mesoporous structure; (c) optionally the consolidation of the mesoporous structure of the deposited film; (d) the elimination of the pore forming agent; and (e) obtaining the ophthalmic lens coated with the mesoporous layer; wherein: (i) the method comprises elimination of the pore forming agent which is carried out at a temperature 150° C.; and (ii) the method comprises a step of introducing at least one reactive agent bearing at least one hydrophobic group before the deposition step (b) of the film of precursor sol and/or after the step (b).