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A reduction in the frequency of blinking during screen use increases the severity of such symptoms as dry eye or irritation and blurred vision. Smartphone users tend to hold their phones very close to the face, thus requiring an intense accommodative effort causing eye strain or headaches.
The main risk for the younger generation is myopia, perhaps not true myopia, but rather an ‘accommodative spasm’ (i.e. near point stress according to Skeffington), since the human eye and brain were not designed for extended near vision.
Ever more pervasive video gaming is associated with player immersion and strong screen flicker. These two situations can eventually stimulate systemic and endocrine functions, resulting in elevated cortisol levels. The main repercussions have been found to affect sleep, behavior, mood, motivation and learning.
The increase in ophthalmic disorders is linked to the proliferation of screens and the time spent watching them: in the classroom (from primary school to postgraduate courses, including tablets, computers, electronic tables, etc.), but also at all ages via the social networks, television and e-books, which are becoming increasingly popular.