Is the T.V. and computer an environmental factor that causes myopia?

Answer:
Heredity is the most common cause of myopia but recent studies have shown that close up activities (such as computers, tv, reading, hand-held game systems) can increase the chances of developing myopia. That is why it is important for parents to be sure that their children don't sit too close to their tvs or computers and don't hold their books and game systems too close.

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