Cause for Dyslexia Hidden in the Human Eye Cells

by Bidita Debnath on  October 21, 2017 at 11:14 PM Research News
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Close to 700 million people struggle with dyslexia across the globe. Dyslexia, or the condition that hampers persons' reading abilities, is often characterized as a neurological issue. New research suggests that dyslexics carry unusually dominant round spots in both eyes, which cause blurring and confusion.
Cause for Dyslexia Hidden in the Human Eye Cells
Cause for Dyslexia Hidden in the Human Eye Cells

According to a new study, people with dyslexia may not have a dominant eye, which may cause the "mirror effect that disrupts their ability to read". Since most humans possess only one dominant eye, dyslexic people have trouble distinguishing left from right and often see letters move around in the wrong order.

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A duo of French scientists said they may have found a physiological, and seemingly treatable, cause for dyslexia hidden in tiny light-receptor cells in the human eye.

In people with the reading disability, the cells were arranged in matching patterns in both eyes, which may be to blame for confusing the brain by producing "mirror" images, the co-authors wrote in the journal Proceedings of the Royal Society B.

For the study, 60 participants' (only half were dyslexic) eyes were examined. Non-dyslexic people had spots that revealed one eye was dominant over the other. While the spots in each eye found in dyslexics indicated that no eye was dominant.

Not having an eye that is dominant can create confusion in the brain by creating "mirror images". This makes it difficult to read and learn.

Source: Medindia

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