Boston March 21, 2018 6:21 pm Gene Therapy Shows Promise for Stopping Vision Loss A groundbreaking procedure in Boston helped a blind teenager see again. US & World Videos 1:11 What is ‘factitious disorder imposed on another,' or FDIA? 0:34 FDA expands eye drop recall to include 27 additional products 1:15 What is dengue fever? 1:20 What to know about Legionnaires' disease 1:26 What you need to know about leprosy