1.Why was this book published?

Fighting against the 2019 Novel Coronavirus Pandemic (COVID-19) is very important! Schools are closed, but education for children and adolescents should not cease. Thus, teachers have resorted to the Internet to provide online classes. Virtual learning is equally effective! Perseverance in study and accumulation of knowledge can make you as helpful as those great heroes like Dr. Nanshan Zhong, Dr. Lanjuan Li, and become the spine of the country, and the pillar of the homeland.

Given the current pandemic situation, you will have to leave your familiar,spacious classroom and get confined in your tiny bedroom or living room with a TV set, a computer, or a small mobile phone. Your respectable teachers will not stand in front of you, and your dear classmates will not play with you every day. There will be no indoor gym, neither outdoor recess. Some of you can't help but wonder: Will my eyes suffer from the overuse of electronic devices? Am I going to get myopia? Is my myopia going to deteriorate? If you are bewildered by those questions, this book is for you.

My dear friends, you have been devoted to the pursuit of knowledge with the assistance of virtual learning. In the meantime, you are encouraged to use your eyes scientifically, protect your eyesight, and learn to control and prevent myopia. Like your parents, we have been greatly concerned about your eye health and eager to care for your eyes. Despite the challenges during this pandemic, we organized a panel of eye specialists to compile this guide book in the hope that it will help you and your parents through this difficult time and provide you a guideline for eye care when you continue with your studies online.