Glasses that are provided with biosensors for detecting signals and are in contact with the user's head are described, which glasses comprise a front frame (2) for supporting respective lenses (4), a pair of sides (6) articulated to the frame (2) on laterally opposing sides, and a nasal-bearing device (8), a pair of sensors (10a, 11a) being integrated in the nasal-bearing device (8) in order to make contact with the surface of the nose, a third sensor (12) being mounted in the centre of the nasal-bearing device (8) in order to make contact with the surface of the face in the zone of the bridge of the nose, and each of the sides (6) comprising a side body (6a) extending into an end side portion in which a particular sensor that makes contact with the head is integrated.