Eyeglasses comprising: - two lenses, each lens having two pairs of holes (61, 62, 63, 64) at a predetermined distance from each other; - a bridge and a pair of fronts (10, 20) furnished with hinge elements connecting them to a pair of temples; and - tubular sleeves (53, 54) housed in the lens holes, wherein the bridge and the fronts (10, 20) are furnished with pairs of prongs (33 - 34, 36 - 37, 13 - 14, 23 - 24), each pair of prongs defining a fork-shaped structure and projecting from the selfsame bridge and fronts to be operatively inserted into the tubular sleeves (53, 54), the prongs having flat lateral faces (13a-13b, 14a-14b, 23a-23b, 24a-24b, 33a-33b, 34a-34b, 36a-36b, 37a-37b), wherein two opposite lateral faces of each prong each define a smooth surface and another two opposite lateral faces of each prong each define a knurled surface, characterized in that the prongs (33 - 34, 36 - 37, 13 - 14, 23 - 24) have, along the longitudinal edges where two of the lateral faces meet, a rough texture formed by a plurality of protrusions (81, 83) projecting in cantilever fashion from both the lateral faces defining the edge, wherein the protrusions forming the rough texture along the edges of the prongs are arranged, on each edge, in a first row projecting from one of the knurled surfaces and in a second row projecting from one of the smooth surfaces, the protrusions of the two rows of protrusions of each edge being longitudinally spaced and alternated in an alternating succession and at 90 degrees to each other, the first row of protrusions being ribs and the second row of protrusions being bosses. - two lenses, each lens having two pairs of holes (61, 62, 63, 64) at a predetermined distance from each other; - a bridge and a pair of fronts (10, 20) furnished with hinge elements connecting them to a pair of temples; and - tubular sleeves (53, 54) housed in the lens holes, wherein the bridge and the fronts (10, 20) are furnished with pairs of prongs (33 - 34, 36 - 37, 13 - 14, 23 - 24), each pair of prongs defining a fork-shaped structure and projecting from the selfsame bridge and fronts to be operatively inserted into the tubular sleeves (53, 54), the prongs having flat lateral faces (13a-13b, 14a-14b, 23a-23b, 24a-24b, 33a-33b, 34a-34b, 36a-36b, 37a-37b), wherein two opposite lateral faces of each prong each define a smooth surface and another two opposite lateral faces of each prong each define a knurled surface, characterized in that the prongs (33 - 34, 36 - 37, 13 - 14, 23 - 24) have, along the longitudinal edges where two of the lateral faces meet, a rough texture formed by a plurality of protrusions (81, 83) projecting in cantilever fashion from both the lateral faces defining the edge, wherein the protrusions forming the rough texture along the edges of the prongs are arranged, on each edge, in a first row projecting from one of the knurled surfaces and in a second row projecting from one of the smooth surfaces, the protrusions of the two rows of protrusions of each edge being longitudinally spaced and alternated in an alternating succession and at 90 degrees to each other, the first row of protrusions being ribs and the second row of protrusions being bosses.