The aim of the study is to evaluate the results obtained in treatment of Intermittent Exotropia with the therapeutic programme applied at the Orthoptic Centre of Sassari Oculist Clinic. 250 patients were considered; 176 completed treatment. The patients were divided into four groups according to the kind of treatment adopted: orthoptic exercises, surgery (double recession of lateral rectus), exercises and surgery, no therapy. Results were evaluated by measuring the acquired state of orthophoria or residual exotropia: less than 10 prismatic diopters (excellent result); residual exotropia between 11 and 20 prismatic diopters (unsatisfactory result); residual exotropia > 20. The highest percentage of excellent results was found in those patients who underwent surgery but only among those who completed the therapy with cycles of orthoptic exercises. Conversely, the worst results were evident in patients who followed no therapeutic programme.