A new dyslexia study found differences in part of the eye called the fovea. This small region in the back of the eye is packed with red, green and blue light receptors. The study found that the blue light receptors are arranged differently in people who have dyslexia than in people who don’t.
The fovea provides much of the information about vision that the optic nerve takes to the brain. And the anatomical differences observed in this study may play a role in eye dominance. (Most people have a dominant eye just like most people have a dominant hand.)