But when is someone eligible for surgery? Surgery is considered for people who do not respond well to AEDs and continue to have recurrent seizures which have a significant impact on their life. The risk of accidents during seizures is also taken into consideration. Furthermore, surgery is only possible for focal types of epilepsy. The doctors will finally consider the potential risks of surgery. An operation can sometimes cause permanent brain damage, such as paralysis, loss of speech or memory loss. Surgery is possible at almost any age. The method can vary.