PURPOSE: To evaluate the first results of disinsertion-distal myektomi and tucking of inferior oblique muscle combined with full tendon advancement of superior oblique muscle in the patients with Knapp II or III superior oblique palsy.METHODS: Disinsertion-distal myectomy and tucking of inferior oblique muscle combined Superior oblique muscle full tendon advancement surgery were performed under general anesthesia on 16 eyes of 13 patients with Knapp Class II or III superior oblique muscle palsy who were involved in the study. Before and after surgery, the degree of vertical deviation in the primary position, abnormal head position, the presence of diplopia, the amount of inferior oblique muscle hyperfunction and superior oblique muscle hypofunction, and the degree of torsion were examined, and the differences were compared. RESULTS: In the preoperative period, twelve of the cases had abnormal head position and two had diplopia. The difference between the preoperative and postoperative period, the amount of the inferior oblique muscle hyperfunction and the superior oblique muscle hypofunction, the degree of vertical deviation in the primary position, and the amount of torsion were found statistically significant (p <0.01).CONCLUSION: According to the first results, disinsertion-resection and tucking of inferior oblique muscle combined superior oblique muscle full tendon advancement surgery was an effective procedure in the patient with congenital and acquired Knapp Class II or III superior oblique muscle palsy.