The invention relates to an optical article having a Bayer value determined in accordance with the ASTM F735-81 standard higher than or equal to 7, comprising a substrate having at least one main face successively coated with a monolayer sub-layer having a thickness higher than or equal to 250 nm and a multilayer interferential coating comprising a stack of at least one high refractive index layer having a refractive index higher than 1.55 and at least one low refractive index layer having a refractive index of 1.55 or less. The ratio: (I) is higher than or equal to 1.5, and/or the deposition of the high refractive index layer of the interferential coating having a refractive index higher than 1.55 and a thickness higher than or equal to 15 nm that is the furthest from the substrate has been carried out under ionic assistance. R D = thickness ⁢ of ⁢ the ⁢ outermost ⁢ low ⁢ refractive ⁢ index layer ⁡ ( s ) ⁢ of ⁢ the ⁢ interferential ⁢ coating thickness ⁢ of ⁢ the ⁢ outermost ⁢ high ⁢ refractive ⁢ index layer ⁡ ( s ) ⁢ of ⁢ the ⁢ interferential ⁢ coating ( I )