Eger was a Hungarian Jew, the youngest of three daughters, living in a town called Kosice in what is modern-day Slovakia. Her father was a tailor; her mother, a civil servant. In March 1944 Hungarian Nazis came to her house and arrested her family.
Before the round-ups, Eger trained as a gymnast for the Hungarian Olympic team, but was not allowed to participate because of her religion.
Shortly after the war, Eger met and married a fellow Hungarian Jew who had been a partisan, anti-Nazi fighter. The young family moved with their infant daughter to the United States to escape communist rule in Hungary. 
Dr. Eger holds a faculty appointment at the University of California—San Diego, and also serves as a consultant for the U.S. Army and U.S. Navy in resiliency training and the treatment of PTSD.