Dyslexia is a broad term defining difficulties in a person’s fluency or comprehension in being able to read; up to one in 10 people are impacted in some way.
Adult dyslexics may be able to read with good comprehension, but they tend to read more slowly than non-dyslexics.
Dyslexia is not an intellectual disability, since dyslexia and IQ are not interrelated.
The University of Twente has studied whether the Dyslexie font can improve comprehension and reading speed for those with dyslexia.
Further information on the font and the study can be found at studiostudio.nl
(Footnote – the British Dyslexia Association has a useful style guide on how to make printed materials more accessible).