a disease which is existent at the time of birth, wherein a baby is not capable of focusing on items as the typical child would. It is marked by the lack of saccades and smooth-pursuit motions in the horizontal place, however, vertical eye ball motions are kept in tact. Many kids with this disease are confused with blindness in children. Sudden jerking of the body, head bobbing and twitching eyes are common symptoms that arise around four to six months of age.