a method for making transparent finished or semi - finished polycarbonate lens first using electrical discharge treatment of the lens surface under certain conditions to improve adhesion of the layers . an electrical discharge is applied to a pva polarized film surface and to a treatment applied on a pva film to make a pva film glued card . by spreading adequate adhesive glue between the pva film glued card and the polycarbonate lens , one unit lens is formed by photo - chemical reaction technology . using this unit lens as a back mold i and setting on a front glass mold ii , monomer is then poured between these two molds and heated evenly to create a solid one piece lens . a hard coating layer is preferably applied to both concave and convex side of polycarbonate polarized or photochromic lens . the method is particular well suited for casting unique features to bond on polycarbonate lens which normally has a limitation to apply special chemical or parts due to high temperature in the injection molding process . a thermosetting monomer such as photochromic monomer or other transparent monomer can be used . polycarbonate polarized lens , polycarbonate photochromic lens and polycarbonate photochromic and polarized lens can be cast thereby . the plastic polarized lens , plastic photochromic lens and plastic photochromic polarized lens can be cast by bonding two thermosetting monomer lenses .