The present invention relates to a surface-treated plastic article
including a thin layer composed of a polymer complex on the surface. The
surface-treated plastic article can be produced by a treatment with at
least one kind of aqueous solutions of polymers having a weight average
molecular weight of 200 or more. According to the present invention, the
plastic articles, such as contact lenses, having superior transparency,
wettability, oxygen permeability, and mechanical properties can be
provided.