My son has epilepsy, but is well controlled with meds...He is 15, 5'11", 180#. Two weeks ago he was wrestling and lost the vision in his right eye (had only sparkles and light)ten minutes after he got done wrestling, his vision cleared. A week later the same thing happened again, and now it has happened two nights in a row at practice...I have made an appt. with eye doctor, and the neurologist scheduled MRI and eeg....what could this be?