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This short monograph is one of the publications of the W. H. Ross Foundation for the Study of Prevention of Blindness.
MacMeeken concludes from the examination of 383 children 3 years of age that a significant percentage (8 to 10 per cent) of children in the Edinburgh schools are severely handicapped by a language difficulty of specialized pattern—a language disability not only affecting reading but spreading over to affect other language functions. Ocular and auditory defects, changes in school and absences from school are not the causes of these reading difficulties, although they may be contributing factors. MacMeeken holds the prime cause to be a "developmental aphasia."
"A significant relationship was found between disability and lefteyedness as determined by sighting or directional tests of eyedness. Every one of these disability children was found to be left-eyed." A child was considered left eyed if on casually being presented with a paper
Hardy LH. Ocular Dominance in Relation to Developmental Aphasia.. Arch Ophthalmol. 1940;23(5):1118–1119. doi:10.1001/archopht.1940.00860131246023
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