The popularity of the iPad has made many children obsessed with it. A student in the third grade of elementary school became addicted to the iPad during the winter vacation. Yesterday, when he went to the hospital for a vision check-up, his eyesight dropped from 1.0 to 0.5, and he also developed astigmatism. Ophthalmology experts warn that children under the age of 18 should preferably not be exposed to electronic products like iPads.