eye changes with seizures

My 6 yr old son had a series of 3 seizures in less then 24 hrs 2 weeks ago, the last was the worst and presented with new symptom, his lips turned blue and his eyes dilated and constricted in and out during the seizure. It happened while he was a school and the nurse said she had never seen the eye changes and she has been practicing for about 30 yrs. Neuro has no explanation. Has anyone ever experienced this?