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 de facto embassy is an office or organisation that serves de facto as an embassy in the absence of normal or official diplomatic relations among countries (thus paradiplomacy); usually, to represent nations which lack full diplomatic recognition, regions or dependencies of countries, or territories over which sovereignty is disputed.