Describes a photochromic article, e.g., an ophthalmic photochromic plastic
article, such as a lens, in which the article includes (1) a rigid
substrate, e.g., a transparent substrate such as a glass or organic
polymeric substrate, as for example, a thermoset or thermoplastic
substrate, (2) a photochromic polymeric coating appended to at least a
portion of at least one surface of the substrate, the photochromic
polymeric coating containing a photochromic amount of at least one
organic photochromic material, e.g., spirooxazine, naphthopyran,
diarylethene and/or fulgide, and (3) a thermally cured transparent
thermoset polymeric coating superposed on, e.g., coherently appended to,
the photochromic coating, the thermally cured polymeric coating being
harder than the photochromic polymeric coating. Describes also the
aforedescribed photochromic article having an abrasion-resistant coating
affixed to the thermally cured polymer coating, e.g., an
abrasion-resistant coating comprising an organo silane; and a
photochromic article having an antireflective coating affixed to the
abrasion-resistant coating.