(EN)
A method for measuring the position of a virtual characteristic point (PRV) associated with the face of a person wearing corrective lenses, said method comprising: acquiring at least two images of the wearer's face using an image acquisition means; estimating the position of the face in relation to the image acquisition means; and determining, on the images, the co-ordinates (Xpref, Ypref) of reference points associated with the face. Given that the virtual characteristic point is visible on at most one image and that the position of the virtual characteristic point is connected to the co-ordinates of the reference point(s) by a predetermined geometric relationship, the measurement method also comprises calculating at least one of the co-ordinates (XPRV, YPRV, ZPRV) of the virtual characteristic point (PRV) on the basis of the reference point(s), using the geometric relationship.