Method for cleaning and disinfecting soft contact lens and treating solution for soft contact lenses

A method for cleaning and disinfecting a soft contact lens which comprises:

• immersing a soft contact lens in a hydrogen peroxide-free treating solution which does not generate hypohalite during electrolysis, said treating solution being an aqueous solution containing as its main component at least one of boric acid and borax, a veronal buffer, a veronal-acetate buffer, a tris-glycine buffer, a tris-citric acid buffer, an alanine-acetic acid buffer, a glycine-acetic acid buffer, a phosphoric acid salt buffer, a citric acid salt buffer, an acetic acid salt buffer, an oxalic acid salt buffer, a tris-EDTA buffer, a succinic acid salt buffer, a tartaric acid salt buffer, K.sub.2 CO.sub.3, Na.sub.2 CO.sub.3, NaHCO.sub.3, Na.sub.2 SO.sub.4, (NH.sub.4).sub.2 So.sub.4 and sodium acetate, and further containing at least one of urea, thiocyanic acid salt and a compound having reducing properties;
• and
• applying a direct current to the treating solution to raise the temperature of the treating solution to at least 80.degree. C.