Abstract:  Objective To observe the changes of the constituent ratios of acute acquired concomitant esotropia and intermittent exotropia hospitalized for inpatient operation after COVID-19 pandemic. Design Retrospective case series. Participants A total of 3140 patients with acute acquired concomitant esotropia and intermittent exotropia were included for strabismus surgery in the Department of Strabismus and Pediatric Ophthalmology of Ningbo Eye Hospital from January 2018 to December 2021, and divided into pre-epidemic group (1330 cases from 2018 to 2019) and post-epidemic group (1810 cases from 2020 to 2021). Methods The case data were reviewed in medical record management system. Main Outcome Measures Constituent ratio. Results The constituent ratios of acute acquired concomitant esotropia (2.87%) and intermittent exotropia (47.24%) in the post-epidemic group were significantly increased than those in the pre-epidemic group (0.90% and 37.29%) (χ2=14.912, P<0.001; χ2=30.928, P<0.001). And the proportions of small angle intermittent exotropia (55.09%) and intermittent exotropia with myopia (77.89%) in the post-epidemic group were also significantly increased than those in the pre-epidemic group (46.37% and 68.15%) (χ2=10.996, P=0.001; χ2=15.632, P<0.001). Conclusion After the COVID-19 pandemic, the constituent ratios of acute acquired concomitant esotropia and intermittent exotropia were also increased signifieantly. The proportion of intermittent exotropia with small angle, as well as with myopia, also increased significantly. (Ophthalmol CHN, 2022, 31: 454-457)

Key words: acute acquired concomitant esotropia, intermittent exotropia, COVID-19 pandemic, myopia, constituent ratio