Functional Amblyopia and Deficient Binocular Vision as Initial Clinical Features in Duane's Syndrome.

Purpose: To investigate and report the clinical characteristics at initial presentation in patients who had Duane Syndrome, especially binocular vision and functional amblyopia.

Methods: The medical files of patients with Duane's syndrome 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 Duane Syndrome. The median age of patients was 6 years. The frequency of amblyopia at initial presentation was 23 percent. Forty-five patients had measurable stereopsis and 58 patients had binocular vision fusion.

Conclusions: Amblyopia and altered binocular function are important among the clinical features of Duane Syndrome which should be highlighted at initial examination.