Abstract: In a process for fitting a contact lens to a human eye, the geometry of the eyeball and the back surface geometry of the lens, and the required optical corrections for the distant and near vision of the eye to be corrected are determined. The measurement for fitting the contact lens takes place with a measuring lens that enables determination of relative pupil motion with respect to a reference system on or near the eye on changing from far vision to near vision. The measuring lens to be used for this measurement process has a substantially spherical lens body that has a substantially convex outer surface and a substantially concave inner surface. This measuring lens preferably serves for fitting multifocal contact lenses. To facilitate the measuring process, arrangements for determining the relative movement of a human pupil with respect to the surface of the measuring lens is provided on the measuring lens.

Abstract: A multifocal contact lens has a substantially spherical lens body that has a substantially convex outer surface, a substantially concave inner surface, and an optical central point, with a horizontal and a vertical axis that intersect in the optical central point. These axes are horizontal and vertical in the sense that the lens being worn on a human eye is in a usually upright position. The lens has a centrally arranged optical zone, a lens outer region, and an rim region, and at least two thickened regions arranged on the outer lens region, between the optical zone and the rim region and laterally of the vertical mid-axis, for setting a given orientation of the contact lens relative to the human eye. A prescribed near vision value, at least in a lower visual region, and a prescribed far vision value in an upper visual region are distributed on the surface of the lens body.