Hi I Have Read Your Reply To A Dad With

Hi I have read your reply to a dad with a two year old son who rolls his eyes back into his head. I care for a 4 1/2 year old girl who also rolls her eyes back into her head but this can happen at any time of the day and any place. It happens when she is alone, walking down stairs, holding your hand, playing with others, really just anytime. It doesnt appear to be for attention. When her eyes come back, she shakes her head and then is back with us so to speak and will continue on with what she was doing. She has been in our care now for a year and it has not stopped but seems to be getting longer and more often. Is this still just behavioural?