It consists of a white flexible cord or string, approximately 10 - 15 feet in length, with colored wooden beads that can be moved to various positions along the length of the string.
To maintain clear, single vision, convergence and divergence skills must be quick, accurate, and consistent.
It consists of a white flexible cord or string, approximately 10 - 15 feet in length, with colored wooden beads that can be moved to various positions along the length of the string.
To maintain clear, single vision, convergence and divergence skills must be quick, accurate, and consistent.