Many children 1 to play computer games, 2  they don't know playing them for a long time is 3 for their eyes. If we look around, we can 4  many children begin to wear glasses when they are six 5  seven years old, even younger. So parents and teachers should 6  children not to play on the computer for a 7  time. Computers are very useful and computer games are also very 8 , but we 9 take good care of our 10 .