Abstract: A method and optical articles for improving or modifying human color vision by using a color filter with a spectral transmission .tau.(.lambda.) to compensate for differences between a spectral sensitivity P*(.lambda.), D*(.lambda.), T*(.lambda.) of an eye with impaired color vision and spectral sensitivity P(.lambda.), D(.lambda.), T(.lambda.) of an eye with normal color vision. The optical article may be realized as an eyeglass, a contact lens or an intraocular lens, or by any other optical implement placed between the eye and the object to be viewed.