Vertical fixation disparity in learning disabled.
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.
Sucher
D F
DF
Stewart
J
J
D000065:Accommodation, Ocular / Q000502:physiology; D002648:Child; D003867:Depth Perception; D005260:Female; D005403:Fixation, Ocular / Q000502:physiology*; D006801:Humans; D015994:Incidence; D007859:Learning Disabilities / Q000503:physiopathology*; D008297:Male; D011698:Pursuit, Smooth / Q000502:physiology; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology; D012030:Refractive Errors / Q000503:physiopathology; D015357:Vision Disparity / Q000502:physiology*