Horizontal transposition of the vertical rectus muscles for excyclotropia

Abstract

Objective To evaluate the effect of horizontal transposition of the vertical rectus muscles on excyclotropia. Methods Seven patients with excyclotropia within last 3 years were reviewed. Two patients were treated with nasal transposition of inferior rectus muscle and temporal transposition of superior rectus muscle, 5 other patients were treated with nasal transposition of the inferior rectus muscle combined with recession because of vertical deviation. The patients were followed up for more than 6 months. Results Nasal transposition of inferior rectus and temporal transposition of superior rectus corrected 11 degrees for excyclotropia in primary position. The effect of nasal transposition of inferior rectus for cyclotropia was a correction of 7 degrees in primary position. Fusion in all gaze positions was restored in 7 patients. All patients were free from diplopia or abnormal head position. The results kept stable after 6 months follow up. Conclusions Horizontal transposition of the vertical rectus muscles is effective on correction of excyclotropia. Key words: Excyclotropia; Harada-Ito procedure