Patent ID: 7641337

Claim:
An ophthalmic lens having an optical axis, comprising: an optic including (i) at least one photochromic region, and (ii) a second region of lesser photochromaticity than the at least one photochromic region, the second region having the optical axis extending therethrough, the second region extending from the optical axis to a radius r, where 0.5 ≦r <1.5 mm, the at least one photochromic region substantially surrounding the second region, wherein the at least one photochromic region is bounded by inner and outer boundaries, the at least one photochromic region having a non-zero concentration of chromaphores at locations between the boundaries, the non-zero concentration of chromaphores varying as a function of radial position such that the at least one photochromic region transmits more light closer to the optical axis than further from the optical axis, wherein the lens is adapted to be applied to an eye and adapted to permit light to transmit through the lens to the retina when applied to the eye.