Introduction and objective:
Over the past decades, especially during the COVID-19 pandemic, the use of digital devices has increased significantly. A negative consequence of this phenomenon is the escalation and exacerbation of the symptoms of digital eye strain (DES). Acute acquired comitant esotropia (AACE) has also begun to be included in its spectrum. The aim of this study is to present the latest scientific reports on acute acquired comitant esotropia and its association with the use of digital devices.

Abbreviated description of the state of knowledge:
Drawn out visual exposure to digital device screens can lead to disturbances in the quality of vision. AACE is a disorder characterized by convergent strabismus with sudden onset and a large angle of deviation, which may be accompanied by double vision. Studies show that the disorder more often affects young adults, but do not exclude the involvement of children or the elderly. It has been suggested that prolonged near work, especially with the use of electronic devices, leads to an increase in the tension of the medial rectus muscle of the eye, followed by its gradual spasticity and eventually its fibrosis. In addition, some studies confirm the possible involvement of myopia in the pathogenesis of AACE.

The number of annually diagnosed cases of AACE is a growing trend, and an increasing number of researchers are linking the development of the condition to increased hours spent in front of a screen on digital devices. Nevertheless, the etiology of AACE in both the paediatric and adult populations remains unclear. An important aspect is education and prevention activities for DES and regular eye check-ups.

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