Methods for preparing functional optical films

A method for preparing a functionalized optical film comprising:

• providing a first film having a smooth surface having a surface roughness value Ra that is less than 0.1 μm and a non-polished surface opposite the smooth surface;
• providing a functionalized adhesive solution comprising a low-melt temperature cellulose resin, a solvent, and a solute comprising at least one functional additive comprising at least one of a dye, tint, pigment, and light filter;
• applying the functionalized adhesive solution onto the non-polished surface of the first film to form a coated first film surface;
• optionally, evaporating at least a portion of the solvent;
• combining the first film with a second film to produce a laminate comprising inwardly-facing first film and second film non-polished surfaces, wherein the first film and second film non-polished surfaces are contacting the solute, resulting in the laminate having smooth outward-facing surfaces;
• and
• combining a third film with the laminate to create a second laminate having the second film disposed between the first film and the third film;
• and
• incorporating the second laminate into an ophthalmic lens;
• wherein at least a portion of the solute co-migrates into the first film with the solvent and becomes embedded below the coated first film surface.