Effects of visual fatigue caused by smartphones on balance function in healthy adults.
Young-Hyun Park, Chang-Man An, Sung-Jun Moon
PMID 28265143WHAT IT FOUND
Smartphone-induced visual fatigue worsened dynamic balance and movement control in healthy adults.
Static balance remained unchanged. The study was small and used a short viewing time, so it does not prove that smartphone use causes balance problems in daily life.
Key findings
01Dynamic postural stability significantly worsened after visual fatigue was induced.
02Static postural stability did not change significantly after visual fatigue was induced.
03Limit of stability scores and running times worsened after visual fatigue was induced.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
The study included only 22 healthy young adults with no balance deficits, so the results cannot be generalized to older adults or people with existing balance problems. The visual fatigue was induced by a fixed 40-minute viewing period, which may not reflect real-world smartphone usage patterns. The study did not measure the actual level of visual fatigue objectively, assuming it was induced by the viewing task. The static balance tests lasted only 20 seconds, which the authors suggest may have been too short to detect changes.
Declared interests
No funding sources or conflicts of interest were reported in the provided text.
The easy way to misread this
Do not conclude that smartphone use causes clinically significant balance disorders. The study showed temporary changes in laboratory balance tests in healthy young adults after a fixed viewing period, not long-term functional impairment.