Not all eye conditions cause your child discomfort, so it's quite possible that your youngster won't cry or even mention a problem, thinking that what he or she is experiencing is something ordinary. Call your child's pediatrician if you observe any of the following symptoms:
frequent eye rubbing
squinting or frowning when trying to focus on something
blinking with unusual frequency
tilting or turning the head to see better as a regular practice
stumbling over small objects
inability to see objects clearly in various light conditions
frequent headaches
red-rimmed, encrusted, or swollen eyes
bloodshot or watery eyes
sties that develop frequently
any accident that might have caused injury to the eye, including contact with an aerosol spray, or impact from a blunt or sharp object