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ON THE ORIGIN OF VISUAL DYSLEXIA
Author(s) -
OUNLOP DONALD B
Publication year - 1981
Publication title -
australian journal of opthalmology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.3
H-Index - 74
eISSN - 1442-9071
pISSN - 0310-1177
DOI - 10.1111/j.1442-9071.1981.tb01012.x
Subject(s) - dyslexia , orthoptic , confusion , reading (process) , optometry , binocular vision , psychology , audiology , medicine , ophthalmology , strabismus , computer science , artificial intelligence , linguistics , philosophy , psychoanalysis
Analysis of the binocular co‐ordination errors of a young dyslexic reveals a simple optical explanation for one of two types of letter confusion found in dyslexia. This complete masking of the original condition with time must severely restrict the value of mass surveys of established dyslexics. Although binocular control was grossly abnormal in reading, no ocular defect could be found in standard ophthalmic and orthoptic tests. Re‐examination of the same patient six years later, again showed no ocular defect on normal testing but binocular movements in reading, while still abnormal, showed no trace of the striking original defect.