Abstract: A hinge portion of a spectacle frame of generally lightweight construction is provided with essentially thin and limited vision obstructing side pieces. The hinge comprises a cam bearing flat metallic component fixedly secured to the respective side end of the front piece of the frame, and a subassembly comprising a ball-shaped cam follower and a spring urging the follower against the cam, the follower and the spring being guidedly housed in an axial bore provided in an elongated metallic body secured to a metallic side piece or to a metallic core of a lightweight side piece, forming the fore and hinge portion of the side piece and a part of an unitary metallic external structure therefor.