But when there is a disruption and the muscles do not work together, some form of strabismus, including exotropia, may occur. Other causes may involve the nerves that transmit information from the brain to the muscles, or the part of the brain that directs eye movements.
de facto segregation-segregation (especially in schools) that happens in fact although not required by law. separatism, segregation-a social system that provides separate facilities for minority groups.
A wife de facto is one whose marriage is Voidable by decree, as distinguished from a wife de jure, or lawful wife. But the term is also frequently used independently of any distinction from de jure; thus a blockade de facto is a blockade that is actually maintained, as distinguished from a mere paper blockade.