Abstract: A lens assembly is disclosed comprising at least first and second removably superimposed eyewear elements each comprising a frame member including framing means for at least one lens. Each frame member has a first longitudinal curvature in an unassembled condition of the lens assembly, and at least the at least second eyewear element further has a flexible intermediate portion providing for longitudinal flexibility of the at least second eyewear element along a transverse medial axis thereof such that the at least second eyewear element is deformable to define a second longitudinal curvature complimentary with the first longitudinal curvature of the at least first eyewear element when the at least first and second eyewear elements are removably axially superimposed in longitudinal alignment.

Abstract: A sealed, polarizing lens assembly including a frame, a first light polarizing lens element, a second light polarizing lens element superimposed with the first lens element and rotatable in relation to the first lens element. The frame and the first element define a sealed chamber in which the second element is entirely enclosed and rotatable relative to the first pair of elements. Means for rotating the second internal element in the sealed chamber relative to the first pair of elements are provided. In one form the means for rotating the internal element in the seal chamber comprise a sealed gearing mechanism with user-accessible external actuators. The sealed, easily-adjusted lens assembly of the invention prevents contamination of internal lens surfaces by dust and moisture, for example. The seal chamber can also be provided with a fluid or gas with desired optical or thermal barrier characteristics.