That's because 15 percent of the U.S. population suffers from a reading disability called dyslexia, according to the National Institutes of Health. Although there is no universally recognized definition of dyslexia, one that has won broad respect is by the World Federation of Neurology. They define dyslexia as a disorder manifested by difficulty in learning to read, despite conventional instruction, adequate intelligence and sociocultural opportunity. The stereotype of dyslexia is that the printed word appears backward to the reader, but dyslexia is more complicated than that, Northrop explains. A person with dyslexia has trouble recognizing what letters look like or sound like.
Words appear to move into one another, squish together.
The print and the background seem to change places or blend together. Dyslexia doesn't exist in isolation. You could have problems copying work off the blackboard. In math, you may not be able to keep the columns aligned. You can have a high IQ, and still have dyslexia.