Optical article with coat and method of making the same

摘要

An optical article comprising a substrate made of a synthetic resin; a modified layer formed on said substrate, said modified layer having a refractive index changing with changes in the thickness thereof; and a hard coat layer formed on said modified layer so as to be continuous with said modified layer, said hard coat layer having a thickness relatively larger than the thickness of said modified layer and having a refractive index which is substantially constant with changes in the thickness thereof.