Xueliang Feng1,2, Shuan Dai3
Purpose: To investigate if and how excessive smartphone use is related to the development of acute acquired comitant esotropia (AACE).
Methods: The medical records and history of smartphone use of 26 patients with AACE between February 2016 and October 2017 were retrospectively reviewed. Duration, intensity of smartphone use, angle of esodeviation and treatment outcome were analysed. Pre‐ and post‐operation deviation and Stereotest Titmus Results for all patients who had underwent strabismus surgery were studied statistically.
Results: 20 out of the 26 patients with the diagnosis of AACE used a smartphone for more than 5 hours daily over a period of several months prior to presentation to the hospital. All patients had comitant esotropia with an average angle of 46.48 prism diopters (PD) for distance and 42.08 PD for near; 24 were myopia with spherical equivalent of −4.33 ± 2.63D in the right eyes and − 4.13 ± 2.59 D in the left eyes (ranging from −1.50D to −11.00D). All the patients had normal neurologic examination and normal MRI scan. Strabismus surgery were needed for all patients to resolve the esotropia and diplopia.
Conclusion: Excessive smartphone use may contribute to the development of AACE in adolescents and young adults.