Dyslexia is a neurobiological specific learning disability involving difficulty with accurate or fluent word recognition, spelling, decoding, and the phonological component of language. It is not a vision impairment, even though it is often described through visual mix-ups. section 5.5.2
Common assumptions are less reliable than they sound:
- Letter reversals such as d/b or q/p, transposed letters, and words that appear to move are familiar anecdotes, not a complete definition of dyslexia. section 5.5.2
- Fonts marketed as dyslexia-friendly may help some people, but evidence does not justify automatically changing every typeface to Comic Sans. section 5.5.2
- OpenDyslexia and Dyslexie are named font options, but offering font choice is more defensible than treating one typeface as a universal solution. section 5.5.2
A more careful typography question
Instead of asking whether one font cures a reading difficulty, ask whether people can choose a display font that works better for them. That keeps typography connected to accessibility without turning a complicated learning disability into a visual styling problem. section 5.5.2 section 5.5
