Christian Boer designed the typeface Dyslexie because “reading printed text is so fluid and transparent for most people that it’s hard to imagine it feeling any other way. Maybe that’s why it took a dyslexic designer to create a typeface that optimizes the reading experience for people who suffer from that condition.” This link has a description of the typeface and an interesting video about how to make type more readable, even for non-dyslexics.