invisable,
These links will help explain VEP and EEG testing.
Information on VEP
http://emedicine.medscape.com/article/1137451-overview
Information on EEG
http://www.nlm.nih.gov/medlineplus/e...cle/003931.htm
I have had an EEG but it was a few years ago and the purpose was to check for seizure activity. I did not have an EEG during the diagnostic process.