Mount for spectacles comprising a front frame having a pair of structures for holding lenses, which structures are connected by a central bridge extending in a nasal support zone, each lens-holding structure comprising: - an upper element for holding the lens, designed so as to surround at least a part of the lens profile at the top, in a brow arch zone, between the central bridge and a corresponding opposite lateral tenon intended to be connected to a lateral arm so as to articulate about an axis of articulation, said upper element being integral to the bridge and to the corresponding lateral tenon, - a lower element for supporting the lens, which element extends so as to surround the remaining part of the lens profile at the bottom between the bridge and the corresponding lateral tenon, said lower element having a first end connected to the front frame at the central bridge and a second, opposite end intended to be constrained to the lateral tenon, characterised in that said mount comprises a corresponding box-shaped body received in each tenon and guided so as to slide to a limited extent in a vertical direction that is substantially parallel to the direction of the axis of articulation, said second end of the lower support element being constrained to said box-shaped body, and in that a surface that has a predetermined incline with respect to the vertical sliding direction is defined on said body, against which surface a screw is active which is screwed in a hole provided in the tenon and directed transversely to the vertical sliding direction, so as to transform a translational movement of the screw with respect to the tenon, which movement is created by the screwing or unscrewing of said screw, into a translational movement of said body in the sliding direction, and to consequently move the lower support element towards or away from the upper support element, in order to generate or remove, respectively, the locking of the lens on the frame between said upper element and lower element. each lens-holding structure comprising: - an upper element for holding the lens, designed so as to surround at least a part of the lens profile at the top, in a brow arch zone, between the central bridge and a corresponding opposite lateral tenon intended to be connected to a lateral arm so as to articulate about an axis of articulation, said upper element being integral to the bridge and to the corresponding lateral tenon, - a lower element for supporting the lens, which element extends so as to surround the remaining part of the lens profile at the bottom between the bridge and the corresponding lateral tenon, said lower element having a first end connected to the front frame at the central bridge and a second, opposite end intended to be constrained to the lateral tenon, - an upper element for holding the lens, designed so as to surround at least a part of the lens profile at the top, in a brow arch zone, between the central bridge and a corresponding opposite lateral tenon intended to be connected to a lateral arm so as to articulate about an axis of articulation, said upper element being integral to the bridge and to the corresponding lateral tenon, - a lower element for supporting the lens, which element extends so as to surround the remaining part of the lens profile at the bottom between the bridge and the corresponding lateral tenon, said lower element having a first end connected to the front frame at the central bridge and a second, opposite end intended to be constrained to the lateral tenon, characterised in that said mount comprises a corresponding box-shaped body received in each tenon and guided so as to slide to a limited extent in a vertical direction that is substantially parallel to the direction of the axis of articulation, said second end of the lower support element being constrained to said box-shaped body, and in that a surface that has a predetermined incline with respect to the vertical sliding direction is defined on said body, against which surface a screw is active which is screwed in a hole provided in the tenon and directed transversely to the vertical sliding direction, so as to transform a translational movement of the screw with respect to the tenon, which movement is created by the screwing or unscrewing of said screw, into a translational movement of said body in the sliding direction, and to consequently move the lower support element towards or away from the upper support element, in order to generate or remove, respectively, the locking of the lens on the frame between said upper element and lower element.