title: Parameters of fixation disparity.
abstract: This paper reviews the definition, causation, and significance of fixation disparity and suggests that the magnitude and character of fixation disparity depend on several major parameters: individual differences in the efficiency of motor and sensory processes of binocularity; natural or prism-induced demands on motor fusion; the presence or absence of foveal or parafoveal fusion clues; and the presence or absence of vergence adaptation. The clinical and research usefulness of fixation disparity as an indicator of binocular stress is emphasized.
mesh_terms: D000221:Adaptation, Ocular; D005133:Eye Movements; D005403:Fixation, Ocular; D006801:Humans; D007909:Lenses; D014786:Vision Disorders / Q000175:diagnosis / Q000209:etiology*