Often attributed to the brain, dyslexia is type of learning difficulties that causes problems with reading, writing and spelling.
Because it’s categorized as a learning difficulty, dyslexia has for long been considered a symptom of a brain condition. However, a team of French scientists now believe that the root of the problem might lie in the eye.
The reason people with dyslexia have problems with learning has nothing to do with intelligence, but with the way they perceive things. When looking at words and/or numbers, a person with dyslexia would see them scrambled, mirrored and not in the linear manner other people perceive them.
— The Life Pile (@thelifepile) November 1, 2018
In a study published in Proceedings of the Royal Society B, French scientists explored the physiological differences in the eyes of people with dyslexia and people without it.
So this is how the human eye works through tiny light receptors known as rods and cones, the latter of which are concentrated in a central region known as the fovea. And just like you have a dominant hand, you also have a dominant eye.
As part of the study, a group of 60 people were divided evenly between those with the condition and those without, and had a closer look into their eyes. It was found that in people without the condition, the dominant eye had one cone-free hole, while the other one had cone-shaped one.
— The Life Pile (@thelifepile) November 7, 2018
When it came to people with dyslexia, both eyes had the same round holes in both eyes, making them see mirror images. This leads to a domination conflict in the brain.
These findings challenge previous theories about dyslexia being a cognitive condition. If correct, then a mere eye test could help doctors diagnose the condition and treat by blocking one of the eyes.