Fig. 1

Comparison of Kaplan–Meier survival curves of surgical outcomes between patients with and without exotropia controllability. The recurrence-free survival curve differs between the groups (p < 0.001, log-rank test). The cumulative probability of success considering recurrence as the event in patients with controllability were 94.4%, 86.4%, 82.1%, and 65.7% at 1, 2, 3, and 4 years after surgery, respectively. In contrast, the probabilities of patients without controllability were 82.9%, 66.3%, 56.4%, and 51.1%, respectively