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.
De facto segregation, based on economic circumstances and other social factors, never ended. For more information, see Related Questions, below. The closest answer to this question may be when President Johnson signed the Civil Rights Act of 1964 into law on July 2, 1964. The Civil Rights Act upheld many earlier Supreme Court decisions that declared segregation unconstitutional but didn't effect wide change, mainly because of strong resistance in the south.