Abstract: A translational soft multi-focal contact lens includes a near-vision portion located in the upper approximate one-third of the optical zone of the lens. A thin, upper portion is formed by a base-down prism in the contact lens which is pushed by the upper eyelid to move the lens downwardly in relation to the cornea, with the thickest part of the lens below the upper lid to assist downward movement, as the lower lid moves down. It also translates down in upward gaze, and laterally and down in sidewards and downward gaze.

Abstract: A soft contact lens of soft opthalmic plastic material with an anterior portion resiliently deformable by movement of the eye. The lens is of the scleral-corneal type, and has a base-down prism portion which moves under the lower eyelid. When the eye gazes downwardly and inwardly, pressure of the lower lid on the thickened portion of the lens causes a bulging of the anterior portion of the lens near the center, creating an increase in diopter power. A slab-off bevel of the lens sides shapes the bulge into proper spherical condition for clearer vision.