Optical plastic product, and plastic spectacle lens and spectacles

An optical plastic product comprising, in this order:

• a plastic base;
• a hard coating film, provided immediately adjacent to at least one surface of the plastic base;
• and
• an optical multilayer film disposed on one or both surfaces of the plastic base, directly or via the hard coating film,
• wherein the optical multilayer film consists of 8 alternating layers of a tensile-stress high-refractive-index layer having tensile stress as internal stress and made of a high refractive index material, and a low refractive index layer made of a low refractive index material,
• wherein the hard coating film comprises an organosiloxane resin,
• wherein the tensile-stress high-refractive-index layer of the optical multilayer film is disposed with a physical film thickness of not greater than 7.5 nm, in a first layer as counted from the plastic base side,
• wherein a total physical film thickness of the optical multilayer film is not less than 561.66 nm, and
• wherein the plastic base or the hard coating film adjacent the first layer of the optical multilayer film has compressive stress as an internal stress.