Eyes Spots May Be a Cause Confusion in People With Dyslexia
Results of a small but eye-opening study conducted at the University of Rennes in France and published in the journal Proceedings of the Royal Society B suggest a potential cause of dyslexia, and a possible avenue of treatment. Among the 60 people included in the study, those with dyslexia had dominant round spots in both eyes in the region where the red, green, and blue cones responsible for color vision are located. In people without dyslexia, one spot in one eye is round while in the other eye it's oblong; the eye with the round spot is dominant.
With dominant round spots in both eyes, dyslexics' may experience blurry vision or become confused when they view images. Written letters appear to move or become jumbled, and distinguishing left from right can sometimes be difficult.
Researcher Guy Ropars told the BBC that the lack of asymmetry they found he and his colleagues found in dyslexics "might be the biological and anatomical basis of reading and spelling disabilities… For dyslexic students, their two eyes are equivalent and their brain has to successively rely on the two slightly different versions of a given visual scene."