Functional amblyopia and deficient binocular vision as initial clinical features in duane's syndrome

Background and Purpose: To investigate and report the clinical characteristics at initial presentation in patients who had Duane's Syndrome (DS), especially binocular vision and functional amblyopia. Methods: The medical files of patients with DS were reviewed. The main outcome measures of the study were the initial clinical characteristics including amblyopia and associated risk factors including deficiences of binocular vision. Results: The review identified 99 patients with DS. The median age of patients was 6 years (4-21). The frequency of amblyopia at initial presentation was 23%. Forty-five (45/62, 72.6%) patients had measurable stereopsis and 58 patients (58/67, 86.8%) had binocular vision fusion. Conclusions: Amblyopia and altered binocular function are important among the clinical features of Duane's Syndrome which should be highlighted at initial examination.