As children spend more time tethered to screens, there is increasing concern about potential harm to their visual development.

Is your iPad being a literal pain in the neck? The answer is likely yes — especially if you're a young adult or a woman. "iPad neck" — persistent pain in the neck and upper shoulders caused by slouching or bending into extreme positions while using tablet computers — is a growing problem among Americans, according to a new UNLV study.

It's a familiar sight in the majority of young families: young children bent over a screen for hours, texting or gaming, lost in a digital world.