Abstract: In a method of manufacturing spectacles of the type which does not have a lens-holding frame and which has a single, wrap-around front lens structure that can extend laterally beyond the main visual regions, and which also has respective arms for the lateral support of the spectacles, predominant portions of the respective lateral arms of the spectacles are produced integrally with the front lens structure by a process for the forming of plastics material with which a semi-finished lens is produced, so that the spectacles are consequently produced in a single piece.

Abstract: A device for spectacles, such as a lug for the articulation of a spectacle arm or a central nasal support bridge, to a lens, the lens has a pair of holes for the locking of the mount member, has a pair of bush members rigidly connected to each other and has respective axial holes, there being provided in the mount member a pair of pin-type appendages capable of being inserted into the respective holes subject to the introduction of these latter into the corresponding lens holes, such that each bush member is interposed between an inner surface of the lens hole and a corresponding outer surface of appendage. Each pin-type appendage has localized protuberances that deform the corresponding coupling surface. The fixing device has at least one relief protruding from the outer wall of each appendage and extending on a helical course in the axial direction of the appendage.

Abstract: In a method of manufacturing spectacles of the type which does not have a lens-holding frame and which has a single, wrap-around front lens structure that can extend laterally beyond the main visual regions, and which also has respective arms for the lateral support of the spectacles, predominant portions of the respective lateral arms of the spectacles are produced integrally with the front lens structure by a process for the forming of plastics material with which a semi-finished lens is produced, so that the spectacles are consequently produced in a single piece.

Abstract: A self-locking nut is described for securing components for spectacles, including a body with an internally-threaded through-hole extending along an axial direction, the body having at least one recess extending transversely to the axial direction and intersecting at least partly the threaded hole, the recess delimiting at least a first and a second portion of the body connected together and axially separated. The main parts of the sections of the threaded hole of the respective first and second portions are axially misaligned in relation to each other along the axial direction and arranged so as to return in substantially reciprocal alignment when the portions are screwed onto a threaded shank. Elastic deformation generated in the portions of the nut, as a result of the return to the aligned position of the threaded sections, being such as to increase the tightening action of the nut on the threaded shank.

Abstract: A lens for spectacles is described which is delimited by a first and a second lens surface which are spaced apart from and located opposite each other, the first surface being arranged to face towards the inner side of the spectacles, near the face of the user when the spectacles are worn, the second opposite surface facing towards the opposite outer side of the spectacles, first cross-sectional curves being defined on the lens by the intersection of the first and second lens surfaces with a plane which is transverse to the lens and intersects a straight line joining the eyes of the user, in which the first cross-sectional curves have negative curvature with the concavity directed towards the outer side of the spectacles.

Abstract: A device for spectacles, such as a lug for the articulation of a spectacle arm or a central nasal support bridge, to a lens, the lens has a pair of holes for the locking of the mount member, has a pair of bush members rigidly connected to each other and has respective axial holes, there being provided in the mount member a pair of pin-type appendages capable of being inserted into the respective holes subject to the introduction of these latter into the corresponding lens holes, such that each bush member is interposed between an inner surface of the lens hole and a corresponding outer surface of appendage. Each pin-type appendage has localized protuberances that deform the corresponding coupling surface. The fixing device has at least one relief protruding from the outer wall of each appendage and extending on a helical course in the axial direction of the appendage.

Abstract: A lens for spectacles is described which is delimited by a first and a second lens surface which are spaced apart from and located opposite each other, the first surface being arranged to face towards the inner side of the spectacles, near the face of the user when the spectacles are worn, the second opposite surface facing towards the opposite outer side of the spectacles, first cross-sectional curves being defined on the lens by the intersection of the first and second lens surfaces with a plane which is transverse to the lens and intersects a straight line joining the eyes of the user, in which the first cross-sectional curves have negative curvature with the concavity directed towards the outer side of the spectacles.