Abstract: An abrasion-resistant coated plastic lens element and a method for coating the element with an abrasion-resistant coating includes forming a coating on a face of a mold that is substantially cured and adherable to lens-forming material. The coating composition consists of reactants, approximately 70% to 95% of which have at least triacrylate functionality and approximately 5% to 30% of which have diacrylate functionality, a photoinitiator, a polymerization inhibitor reactive with oxygen, and a silane adhesion promoter and an acid to activate the silane adhesion promoter. The coating is applied to the face of the mold to form a substantially uniform coating and is then subjected to ultraviolet light in an ambient oxygen-containing environment such that a hard abrasion-resistant coating is formed on the mold. The mold is then filled with a lens-forming composition which is reactive with acrylate groups of the coating at a coating/lens interface.

Abstract: A lens having a set of physical features provided on the edge thereof for permitting a set of reference marks to be placed on the lens surface together with an apparatus for applying these physical features to the lens. The apparatus comprises a mold assembly in which the gasket is provided with a plurality of precisely located ridges which define a plurality of corresponding notches formed on the edge of the lens to locate, for example, the distance portion optical center and the 0.degree.-180.degree. lines of a progressive power lens. The gasket is additionally provided with other ridges adapted to mate with grooves formed on the mold member defining the progressive lens surface to ensure proper alignment of that member with the gasket.

Abstract: Method and apparatus for manufacturing glass progressive power lenses. The lenses are manufactured by a vacuum forming technique in which a glass lens is placed upon a forming block, heated to its softening point, and then forced to sag against and assume the shape of the forming block surface by the creation of a vacuum between the lens blank and the block surface. The forming block is provided with a plurality of apertures through which the vacuum is drawn and these apertures are positioned so as to ensure the maintenance of an adequate pressure differential between the two surfaces of the lens blank as it sags in a wave-like manner from its center towards its periphery.