Abstract: The method comprises introducing into a reactor including a transparent polymer substrate containing a free plasticizer and the photochromic additive, supercritical fluid and maintaining this fluid in the reactor for the time necessary for incorporating the photochromic additive into the article, removing the supercritical fluid and recovering the ophthalmic article in which the photochromic additive has been incorporated.

Abstract: The method comprises introducing into a reactor including a transparent polymer substrate containing a free plasticizer and the photochromic additive, supercritical fluid and maintaining this fluid in the reactor for the time necessary for incorporating the photochromic additive into the article, removing the supercritical fluid and recovering the ophthalmic article in which the photochromic additive has been incorporated.

Abstract: Polymerizable monomer compositions, transparent polymer substrates and optical and ophthalmic articles obtained.

Abstract: Described is a mold for producing optical lenses from a polymerizable material and a method for such production. Said mold comprises a gasket (1) enclosing an aperture (2), which aperture (2) extends along an axis (14), and providing a contact surface (3) radially extending from said aperture (2), a first molding shell (4) abutting against said contact surface (3), a second molding shell (5) arranged within said aperture (2) at a distance from said first molding shell (4), means (6) for pressing said first molding shell against said contact surface, means (7) for radially pressing said gasket against said second molding shell, and a filling opening, thereby forming a molding cavity (8) that can be filled with molding material between said first (4) and said second (5) molding shell and said gasket (1).

Abstract: A method is described that combines the advantages of the dip-coating method with those of the spin-coating method, whereby at least one liquid coating composition is deposited on a substrate by means of at least one spray nozzle, and wherein said substrate is rotated (spinned) for some time at least after said liquid coating composition has been deposited. This method is particularly suited for the coating of ophthalmic substrates. Furthermore a device suitable for performing such a method is also disclosed.

Abstract: The method comprises introducing into a reactor including a transparent polymer substrate containing a free plasticizer and the photochromic additive, supercritical fluid and maintaining this fluid in the reactor for the time necessary for incorporating the photochromic additive into the article, removing the supercritical fluid and recovering the ophthalmic article in which the photochromic additive has been incorporated.

Abstract: A mold for making an optical lens and formed of two molding shells disposed on edge and an annular closure member around their periphery and defining with them a molding cavity. To fill the mold a molding material is introduced into the molding cavity through a casting opening formed for this purpose in the closure member. The casting opening is in the lower part of the molding cavity.

Abstract: In a method of manufacturing an optical lens from a polymerizable synthetic material a lens molding assembly is provided including two molding shells and an annular closure member disposed around the molding shells and defining therewith a required molding cavity. The mold is filled with molding material and polymerization of the molding material is at least started. The operations of assembling the mold, filling it and at least starting polymerization of the molding material are conducted in the lens molding assembly.