Latency in the improvement course of fusional ability during orthoptic training for intermittent exotropia: a retrospective observational case series

: The existence of the latency period in the improvement course of fusional ability was determined; that period can be considered as the period of learning and acquiring the necessary skills of performing the assignments throughout the training. Therefore, even if no improvement is evident at the early stages of training, it is advisable to continue the training for at least 9 weeks.