The invention relates to ophthalmic spectacles for characterizing a convergence of the eyes (100, 200) of a wearer. Each lens (1,2) of the spectacles is provided with output sections for guiding a radiation towards the side areas (ZD1, ZG1, ZD2, ZG2) of an eye of the carrier, in which the right and left portions of the corneal margin (L) of said eye are in motion. The lens further comprises input sections for collecting the portions of said radiation reflected in said side areas of the eye. A computing unit is also combined with the spectacles in order to determine the convergence of the eyes of the wearer from detection signals measuring the portions of the radiation that are simultaneously collected by the input sections of the two lenses.
