Provided are
protective glasses and / or sunglasses equipped with a frame adapted to support a lens
assembly having at least one structural lens made of plastics material and at least one
liquid crystal (LC) film of the
guest host type arranged on an inner side of the at least one structural lens and controlled by an
electronic board powered by an
energy source. The at least one structural lens has a
free edge extending beyond an outline of the at least one LC film at which the lens
assembly is fixed to the frame. A
free space is provided between the frame and the at least one LC film. The frame is provided with a vertically projecting rib covering the
free edge and the
free space. The rib not only reduces deformations of the lens
assembly, but also prevents infiltrations of light around the LC film that would compromise comfortable vision.