Ryu WY, et al. - Using big data, researchers identified the frequency of strabismus in children initially diagnosed with pseudostrabismus. Participants in the study were 17,885 children diagnosed with pseudostrabismus at age ≤ 3 years who were later diagnosed with strabismus utilizing the Optum© de-identified Clinformatics® Data Mart Database (2003-2016). According to this population-based retrospective cohort study, young children diagnosed with pseudostrabismus were at higher risk of developing strabismus and undergoing strabismus surgery.