Patent ID: 8770745

Claim:
A lens for controlling a location at which a peripheral vision image is focused relative to a retina of an eye, the lens comprising: a central portion having at least one optical zone that provides optical control over light rays passing through the central portion, the central portion having a power profile that optically controls a location at which a center vision image is focused relative to a retina of an eye, wherein the central portion extends a radial distance from a center of the lens outwardly toward a periphery of the central portion that is between about 3.5 millimeters (mm) and about 4.0 mm, a peripheral portion having at least one optical zone that provides optical control over light rays passing through the peripheral portion, the peripheral portion having a power profile that optically controls a location at which a peripheral vision image is focused relative to a retina of an eye, wherein the power profile of the peripheral portion is defined by a mathematical function that is discontinuous at the boundary where the periphery of the central portion meets the peripheral portion such that a first derivative of the function is not obtainable, and wherein the optical power provided by the power profile of the central portion at the boundary and the optical power provided by the power profile of the peripheral portion at the boundary differ by no more than about 8.0 Diopters; and wherein the lens, when worn on a person's eye, provides myopic defocus of the peripheral vision image that helps prevent or inhibit growth of the eye.