Vertical Fixation Disparity in Learning Disabled

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In this correlation study of visual parameters as related to learning disabilities, we considered several deficits: uncorrected refractive error, accommodative infacility, inaccurate pursuits, and vertical fixation disparity. Because vision is the primary sensory input involved in reading, it is nothing new to find a correlation between visual deficits and learning problems; however, vertical fixation disparity, unique in its relation to other sensory systems, deserves a great deal of attention. The high incidence of vertical fixation disparity measured in 5th and 6th graders with learning disabilities suggests that there is a plausible causal relation. Vertical oculomotor imbalance, vestibular problems, and learning disability are discussed.

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