Another good way to see if you are overusing your smartphone is if you realize you are getting poor vision to see far at the distance. Excesive near work could cause myopia.
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Another good way to see if you are overusing your smartphone is if you realize you are getting poor vision to see far at the distance. Excesive near work could cause myopia.
Yes, if your looking at any screen for long periods it's good to look off into the distance.