Stereopsis and Clinical Features of Esotropia Patients Accompanied by Congenital Ptosis

Background: To evaluate binocular function and clinical features in patients with esotropia (ET) accompanied by congenital ptosis. Methods Clinical records of 44 ET patients with congenital ptosis (ET-ptosis group) and 71 age-matched ET patients without ptosis (ET only group) who presented for eye examination between January 2016 and December 2021 were retrospectively reviewed. Best-corrected visual acuity (BCVA), magnitude of esodeviation (at a distance and near) and stereopsis at the first visit were reviewed. Stereopsis and other clinical features of the two groups were compared. Results The mean (± standard deviation) age of overall patients was 5.7 (± 1.9) years. There was no significant difference in the distribution of age, sex, spherical equivalent refractive errors, BCVA, or magnitude of esotropia (at distance or near) between the two groups (all p  > 0.05). Furthermore, stereopsis at near and the number of patients with amblyopia did not differ significantly between the two groups (Titmus test, p  = 0.73; Randot test, p  = 0.49; number of amblyopia patients, n = 16 (36.4%) vs. n = 35 (49.3%), p  = 0.39). Of these patients, 51 (44.3%) had amblyopia. The number of ptosis patients did not differ significantly between the amblyopia group and the no amblyopia group ( p  = 0.12). Conclusion In patients with ET and congenital ptosis, stereopsis and visual acuity were not different from those in ET only patients. The presence of co-existing ptosis might not have a further deleterious impact on binocular function in ET patients.