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.
Learner's definition of DE FACTO. always used before a noun formal. â used to describe something that exists but that is not officially accepted or recognized. She became the de facto leader of the group. [=she was the unofficial leader] a de facto state of war. de facto government policies.