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(via https://birdfont.org/)
certain kinds of typography do offer potential benefits for dyslexic readers, especially on electronic reading devices like tablets and e-books, but that typeface design in particular has not yet been shown to provide statistically significant benefits in reading speed for dyslexics and has shown only mixed results in reading error reduction.
via http://bigelowandholmes.typepad.com/bigelow-holmes/2014/11/typography-dyslexia.html