DECENTERED NONCORRECTIVE LENS FOR EYEGLASSES

摘要

PROBLEM TO BE SOLVED: To provide a high-base noncorrective lens which minimizes optical distortion of the whole visual field while cutting off light over the entire visual field, and is used for two-lens spectacles of such a type that a rake and a wrap are exhibited. SOLUTION: Disclosed is an optically corrected lens for nonprescription eyeglasses. The anterior surface 28 of a lens 12 or 14 lies on a portion of a first sphere having a first center. The posterior surface 30 of the lens 12 or 14 lies on a portion of the surface of a second sphere having a second center. The first and second centers are offset from one another to provide a tapered lens. The lens 12 or 14 is oriented on the head of the wearer by a frame that maintains the lens in a position such that a line drawn through the first and second centers is maintained substantially in parallel to the normal sight line 27 of the wearer. Lenses are thus provided which have improved optics when mounted in an as-worn orientation such that they exhibit both vertical "rake" and horizontal "wrap". COPYRIGHT: (C)2008,JPO&INPIT