Not sure if you're experiencing the same thing that I have - eyes rolling up a lot, noticeably moreso when tired, or not concentrating.
I've had this condition since I was a young child, and no doctor or neurologist has yet been able to explain to me what it is. For me, I find it is a signal of tiredness, and nothing more. It hasn't stopped me driving or anything like that, and doesn't seem to be linked with any sort of epilepsy.
Not sure if thats any help, but i'm still trying to find out what causes it myself.