My daughter, now 10, has been in glasses since she was only 2. She has light blue eyes and sounds like your son my be as sensitive as she is to the drops. A good ophthalmologist will want to know how long the eyes were dilated after the appointment so as to prevent it from happening again. I recommend giving them a call and talking with them. My daughter sees a pediatric ophthalmology specialist twice a year and they are very diligent to minimize the use of dilation in children b/c it isn't good for your eyes and can be damaging when dilated for long periods, especially when seen as often as my daughter is. I always say, when in doubt, just call the doctor - that's why they're there! :-)