Children today spend more time stare at computer and (1)______ TV screens both at school and at home. Scientific (2)______ studies show an epidemic of myopia (also known as nearsightedness) has struck children—and it is spreading faster in many countries. Doctors warn that sitting too close to a computer, especially fixes your eyes at a computer or (3)______ TV screen from close range, increases the risk of myopia. The cause of myopia is difficult to explain in simple terms. While some say sitting near computers and TV screens is one of the reasons, others say children born to nearsighted parent/parents are vulnerable. (4)______ Can genes or the environment, or a combination of two (5)______ explain the growing prevalence of myopia across many countries How can parents understand what causes myopia and the risks it poses to their children’s eyesight Children suffering from myopia have trouble seeing close objects clearly. The eyeball is thought to become (6)______ longer, because of which less effort is needed to see up close. Moreover, the elongated eye can no longer focus on (7)______ distant objects. Symptoms of myopia are rarely noticed in early (8)______ childhood. Myopic children must hold books very close to (9)______ their face or may not be able to read the writing on the blackboard in school. They may squint and complain of (10)______ head and eyestrain.