There is evidence that the manner in which text is presented to a reader, including font, is an important factor regarding the reading performance of people with dyslexia. A person with dyslexia cannot perceive if they are reading or writing correctly.
Dyslexia is characterised by the individual experiencing difficulties with accurate word recognition and by poor spelling and decoding abilities. In a study by Luz Rello and Ricardo Baeza-Yates published in 2013, the authors concluded that font types do have an impact on readability for individuals with dyslexia.
Good fonts for dyslexics included Helvetica, Courier, Arial, Verdana and
CMU when taking into consideration both, reading performance
and subjective preferences. It was found that italic fonts decreased reading performance, in particular, Arial It. significantly decreased readability.
The findings have an impact on individuals when selecting systems that rely on text as the main information medium, such as browsers, PDF viewers, or eBook readers.