79 variable esotropias underwent bilateral "Fadenoperations". In the first group, the posterior fixation has been performed alone. In the second series, conventional symmetrical recessions of the medial recti have been performed during the same procedure. Two further additional weakening techniques are compared in the last group: anterior medial tenotomies and the so-called "stretch effect". Concomittant recessions considerably enforced the amount of angle reduction for distance and near without affecting precision, predictibility and stability of the results. Tenotomies and stretching procedures were followed by inconstant results.