Abstract: Electrochromic mirrors have, as a central component, an optically active cell which comprises two plates (1, 2) which are arranged in a laminate-like fashion and which are provided in each case on the inside with a planar electrode between which an electrochromic medium (5) is located and which are connected to one another in a sealed fashion by means of a bead (6) of adhesive which runs around the edge region of the plates (1, 2) and leaves a narrow edge strip exposed. In order to ensure a secure attachment of connecting wires (8a, 8b) which does not change the dimensions of the mirror, each edge strip of the planar electrodes is divided in half into an insulated edge-strip section (11a, 11b) by means of a separating trench (9a, 9b) such that in each case the insulated edge section lies opposite with the non-insulated edge section of the other surface electrode.

Abstract: The invention contemplates a circular spectacle-lens blank which is optically finished on both its front and back surfaces and which is characterized by locally hardened registering central areas of both surfaces. The hardened areas are sized to be universally included within the spectacle-frame profile of all frames within a given variety of frames, and the outer annular areas are unhardened and of such effective radial extent as to embrace all of such profiles within said variety, so that each finished and hardened blank is adapted for later edging to the profile of a later selected one of the frames within the given variety. Various methods are described for creating the indicated locally hardened regions on the otherwise-finished lens blanks.