Abrasion wear resistant coated substrate product

The coated substrate product finds particular application in eyeglass and sunglass lenses, architectural glass, analytical instrument windows, automotive windshields and laser bar code scanners for use in retail stores and supermarkets. The product has greatly improved wear resistance for severe abrasive environments and comprises a substantially optically transparent substrate, a chemically vapor deposited first interlayer bonded to the substrate and a chemically vapor deposited outer layer of substantially optically transparent diamond-like carbon bonded to the interlayer and away from the substrate.