الفهرس 
Smart Phone (Definition and Mechanism of Action)Only 14 pages are availabe for public view
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Abstract
Objective: To investigate the effect of visual fatigue caused by smart phone on the balance function.
Subjects and Methods: Forty subjects divided into 2 groups were included in the present study . group I, twenty normal healthy subjects with mean age of 28.8 years. group II, twenty subjects with a clinical diagnosis of peripheral vestibular disorder with mean age of 38.85years. They were subjected to a computer vision syndrome questionnaire (CVS-Q) , occulomotor tests of videonystagmography (VNG) and sensory organization test (SOT) of computerized dynamic posturography (CDP) before and after visual fatigue induction.
Results: Significant differences existed between C5, 6 and composite scores in group I and in C4 and composite scores in group II after visual fatigue induction. However, there was no significant difference between occulomotor tests in both groups after visual fatigue induction.
Conclusions: The smart phone use can affect the balance function in healthy subjects and augment the deficit in those with balance problem. Reducing visual fatigue should be considered through various procedures as taking proper rest, adjusting the brightness of screen, avoid any wrong posture and using filters if possible.