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Laterality and directionality--optometric clinical applications.

Five rationales for the optometric evaluation of laterality and directionality are identified in this paper. These include an application of particular studies in the infant's vision literature along with theories of Hershenson, Piaget, Gesell and Kephart and the phenomenon of reversal confusion frequently associated with learning-disabled children. Selected optometric testing procedures are viewed in the context of these rationales.