Abstract: Objective The present study aimed to investigate the clinical features of acute concomitant esotropia, as well as the long-term effects of curative treatment approaches. Methods The study included 11 patients with acute concomitant esotropia who were treated by the same clinician between October 2014 and June 2017. We examined the effect of prism treatment or surgical intervention on diplopia, eye function, eye movement, and binocular visual function according to the clinical characteristics. Results Following the removal of the prism after at least 6 months of treatment, binocular vision had returned to normal. No postoperative diplopia was observed in surgical patients, who also exhibited improvements in ocular positivity, binocular vision, and eye movement. Conclusion Both prism and surgical treatment can be used to achieve satisfactory long-term outcomes in patients with acute concomitant esotropia. The appropriate treatment should be selected based on the patient’s clinical features, the size of the oblique visual field, and the degree of diplopia.

Key words: Acute common strabismus, Binocular vision, Prism