A method of identifying on an eye of a patient an operating angle measured in an angular mark (60) formed by the center of the eye and a horizontal axis passing through the center of the eye, said axis being included in a horizontal plane (xt, yt) of a reference of a predetermined terrestrial reference (xt, yt, zt), consists in: ▪ forming an optical image of the eye on a plane sensitive surface (26) of a digital sensor (20), said sensor being provided with a mark (x, y, z) having first and second axes (x, y) of said sensitive surface (26)； Acquiring a digital image of the optical image of the eye formed on said sensitive surface (26), said image being provided with a mark consisting of a first and a second axis respectively corresponding to said first and second axes of the digital sensor landmark； ▪ during the acquisition of the digital image of the eye, measuring the rotation of the reference (x, y, z) of the digital sensor (20) relative to the reference (xt, yt, zt) of the terrestrial reference system； ▪ determining an angle of inclination (θH) defined between the first axis (x) of the reference of the digital sensor (20) and the intersection of the horizontal plane (xt, yt) of the reference (xt, yt, zt) of the terrestrial reference frame with the sensitive surface (26)； ▪ determining an angular reference (60) in the digital image of the eye, consisting of the digital image of the center of the eye and an axis angularly separated from the first axis of the reference of the digital image by the determined angle of inclination (θH)； ▪ postpone the operating angle in the angular marker (60) of the digital image； and ▪ displaying the digital image of the eye with a mark (62) identifying the operating angle reported. Un procédé d'identification sur un œil d'un patient d'un angle opératoire mesuré dans un repère angulaire (60) formé du centre de l'œil et d'un axe horizontal passant par le centre de l'œil, ledit axe étant compris dans un plan horizontal (xt, yt
