Bluelightexposureisnothingnew.Infact, thesunisthelargestsourceofbluelight.Moreover,bluelightisalsopresentinLEDlight.Butif bluelightisn?tharmful,then whyare weconstantlyrubbingoureyeswhen we?relookingat ourscreens? Theansweriseyestrain(眼疲劳): Morethan60percentofpeopleexperienceeye problemsassociated with d...