Focal seizures are seizures that only involve one area of the body, ie your leg.
Your doctor should have provided you with some information about seizures, if not, go to your library and check out some books on the disorder to alleviate your concerns. There are several very good books that describe each 'type' of seizure.
As far as your license goes, that will have to be determined by your doctor, depending on how frequently they occur and how you are affected by them in relation to controlling your vehicle and even what triggers them.
Treatment varies depending on your doctor and the results of the tests.
[This message has been edited by mom4all (edited 07-13-2002).]