COUNCIL CHRONICLE – A newly released study believes to have found the possible cause of dyslexia, one that is tied to the vision and the dominant eye. Seemingly, most people with this so-called “reading disorder” have dominant round spots in both of their eyes, when usually, they are in just one.
Dyslexia Tied to the Dominant Eye
University of Rennes scientists are behind this new study, which involved some 60 participants, half of them having the reading disorder. The researchers took a closer look at both the 30 people with and without dyslexia.
Usually, the color cone cells for green, red, and blue, are dispersed differently within the eyes, with each one having its own pattern and arrangement. Because of this, multi-angle, complex light sources get absorbed differently, which leads to the appearance of a dominant eye.
According to the study results, in people with dyslexia, the blue cone-free spot in both of the eyes is a round-shaped spot. In those without the disorder, one of these spots is rather more oblong or oval.
The cones’ having the same shape also indicates that neither eye is dominant. Because of this, the eyes might be delivering the same image data but with slight differences. In turn, this might confuse the brain and cause the reading problems.
“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,” state the research members.
They continue by pointing out that this might be the “biological and anatomical basis of reading and spelling disabilities”.
Some researchers not involved with the study consider its findings “really interesting”. These state that this research really helps drive forth the importance of eye dominance in reading and spelling.
However, specialists consider that this wouldn’t help offer a universal explanation for dyslexia. The condition is estimated to be affecting some 10 percent of the world’s population. Previous research indicated that this seems to be an inherited condition, but that environmental factors might also have a role to play.
This study’s detailed findings are available in the journal Proceedings of the Royal Society B.
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