Beware of the harms digital devices can cause

As the use of digital devices is becoming more common, so are many conditions associated with their increased use. That is why, especially given the excessive use of digital devices during vacations, youngsters should be particularly careful. This applies to all kinds of digital devices, including TV and gaming systems, tablets and computers, and smartphones.

An estimated 28 percent of the people in the United States spend 10 or more hours a day in front of digital devices, and 65 percent spend three to nine hours doing the same. The 2015 Visio Council report on digital eyestrain says more than 90 percent of American adults use digital devices for at least two hours a day. And more than 60 million children worldwide likely use digital devices for several hours a day, which doesn't include TV time or gaming systems.

China is now home to the largest number of cellphone and Internet users in the world. Digital activity has become an integral part of Chinese life, and instant messaging is the main form of online communication.