Abstract: A frame for sunglasses, of the type including a front-piece (1), nose bridge elements (5), and an add-on element (6) to support prescription (RX) lenses which may be removably applied to the inner side of the frontpiece (1), wherein the nose bridge (5) includes of a separate piece and has a head portion (4), the frontpiece has in its middle portion a recessed seat (3) equipped with a raised land (3a) whereto the head (4) of the nose bridge (5) may be fastened, and the add-on element (6) has a fork element (F1, F2) which may be snap-fastened to the head (4) of the nose bridge (5).