"The causes of dyslexia—the disorder that makes reading excruciatingly difficult for about one in twenty school-aged children—have remained frustratingly elusive, as has anything resembling a cure. Training programs for dyslexics have proven effective at improving certain parts of the reading process, such as phonological awareness and auditory perception."
This article discusses some of the new research on dyslixia. Links are provided in the article, and two that you may want check are listed below.
New Font Helps Dyslexics Read:
Extra-Large Letter Spacing Improves Reading in Dyslexia:
Via Beth Dichter