A duo of French scientists said Wednesday 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 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," the duo added.
The team used an LED lamp, flashing so fast that it is invisible to the naked eye, to "cancel" one of the images in the brains of dyslexic trial participants while reading.
"Our observations lead us to believe that we indeed found a potential cause of dyslexia," study co-author Guy Ropars of the University of Rennes, told AFP.
It offers a "relatively simple" method of diagnosis, he added, by simply looking into a subject's eyes.
Furthermore, "the discovery of a delay (of about 10 thousandths of a second) between the primary image and the mirror image in the opposing hemispheres of the brain, allowed us to develop a method to erase the mirror image that is so confusing for dyslexic people" -- using an LED lamp.
Most of us have been there - a wide, straight, smooth, seemingly safe and eerily remote French motorway that almost invites you to put your foot down.
There's barely a handful of other vehicles around and no sign of speed cameras or traffic cops.