A head injury
is certainly a cause of concern and alarm and in your case the injury is quite large. As you rightly checked the pupils, attention should be paid to his state of consciousness. Even during sleep, you can ascertain if he can be aroused without difficulty or not. If he wakes up, and looks otherwise fine and alert, you need not worry. Since it requires a certain degree of vigilance, it is best to admit your baby in a nearby hospital for at least 24 to 48 hours. As per the advice of the attending doctor, a CT of the head can be planned to completely allay your anxiety
and ensure there is no internal injury.