Abstract: The soft toric contact lens has a substantially rotationally symmetrical front face optionally having a rotationally symmetrical lenticular construction, and a substantially aspherical, especially ellipsoidal, rear face. The optically active central region of the rear face is toric. Shifting the torus to the central region of the lens rear face results in lenses that are economic to produce, are of wearable thickness and are straightforward to fit.

Abstract: A contact lens that consists of gas-permeable, especially oxygen-permeable, lens material and has a supporting edge which rests on the sclera and is covered at least partially by both eyelids and absorbs the forces acting on the lens as the lid closes, the rear face of the lens in the region of the cornea being spaced from the surface of the cornea. By ensuring the exchange of lachrymal fluid between the contact lens and the surface of the eye, metabolic products are transported away and the supply of oxygen to the cornea is assisted. For that purpose, channels may be provided on the lens or the lens may be caused to rotate.