Soft bifocal contact lens

Claim 1

A soft multi-focal contact lens adapted for translational movement by the upper and lower eyelids, downward and sideward across the cornea of an eye, comprising: a generally disc-shaped soft lens having a diameter greater than the cornea of an eye, an anterior surface and a posterior surface, the posterior surface being adapted to conform to the entire surface of the cornea limbus, part of the sclera of any eye, the lens having a diameter sufficient to extend partially under both the upper and lower eyelids; said lens having a generally circular optical zone with a lower, distance-vision portion, and a near-vision portion above and to the sides of the distance-vision portion; said lens having a base down prism forming an upper thinner portion and thicker lower portion of said contact lens, which is adapted to cooperate with the upper eyelid of the eye to provide a surface against which the upper eyelid will push the contact lens downwardly with respect to the cornea, and facilitate the lower lid in moving the lens down.