Results of asymmetric bilateral medial rectus retroposition in unilateral Duane retraction syndrome’s type I

Objective: To describe the results of asymmetric bilateral medial rectus retroposition in unilateral Duane retraction syndrome-this type I. Method: This is a retrospective study involving 18 patients, mean age 11.2 years (3-37 years) with unilateral Duane retraction syndrome’s type who were operated in 2009 up to 2011 year. The aim was to investigate the existence of ocular torticollis, size deviation before and after surgery and presence of amblyopia, anisometropia, type of refractive errors and lateralization. Results: All 18 patients were surgically treated by asymmetric retroposition of internal rectus (for 1-2mm more on the healthy eye). All patients preoperatively de-monstrated ocular torticollis. Size of mean preoperative deviation was +22.2 pD of primary angle PD and +46 pD of secondary angle. Postoperative finding: deviation of> +10 PD is noted to the presence of mild torticollis in one patient. Intermediate follow-up period was 9.8 months. Unilateral Duane’s syndrome is common among members of women (67%) compared to males (33%). Lateralization of Duane’s syndrome is more common in the left eye compared to the right (83% vs. 17%). Amblyopia was present in two patients and anisometropia (11.1%). As for refractive errors: hyperopia was found in 9 patients (50%), hypermetric astigmatism in 7 cases (39%), myopia and 1 (5.5%) and emmetropia (5.5%). None of the patients had no pathological changes in the fundus and anterior segment. Conclusion: Asymmetric bilateral medial rectus retroposition is extremely effective in the treatment of ocular torticollis and esotropia in patients with unilateral Duane retraction syndrome-this type I.