Dyslexie broke typography's uniformity rules so letters can't flip

Typeface design has a standing rule: letters should be as uniform as possible — the same arch on h as on n, the same weight top and bottom — because uniformity reads as clean and quiet. Christian Boer, diagnosed with dyslexia at six, experienced the cost of that rule from the inside: his brain treats two-dimensional letters as three-dimensional objects it can rotate and mirror, so b becomes d, p or q mid-sentence. While studying at HKU University of the Arts in Utrecht, he designed a typeface whose entire premise is breaking that rule.

Dyslexie slaps the '3D letters' flat, in Boer's phrase, by making every rotation look wrong. Letters are bottom-heavy — 'like fixing a brick onto a bicycle wheel', he tells the BBC: spin the wheel and the brick always falls to the bottom, so a flipped letter reads as obviously unnatural. Lookalike pairs are pulled apart: b and d get different top widths, v, w and y different heights, u gets a tapered serif that makes its right stick longer than n's, and capitals are bolder so they stand out — a tweak Boer toned down after users with milder dyslexia found it impaired their reading.

The font started as Boer's art degree project for an audience of one, but demand from other dyslexics turned it into a product, available online since 2011 with more than 300,000 downloads by home users, schools, universities and businesses. It is also one of the few such fonts with third-party evidence: University of Twente research found dyslexic readers make fewer mistakes reading in Dyslexie, and eye-tracking at France's University of Lille found dyslexic children's gaze flows more easily across text set in it.

Break typography's uniformity rule on purpose: bottom-heavy, asymmetric letters look wrong when mentally rotated, so dyslexic readers cannot flip them.

The insight reframes dyslexic reading as a rotation problem and fixes it with weight and asymmetry rather than decoration — the letters work by being hard to turn, not prettier to see.

It carries independent evidence, not testimonials: controlled reading tests at Twente and eye-tracking at Lille point the same direction.

The designer is the user, so iteration ran on lived feedback — softening the bold capitals when milder dyslexics pushed back.

Design rules encode the average user; obeying them is the fastest way to build an inaccessible product. Boer inverted the exact rule his own brain broke — the wrong-looking font is the feature.

Dyslexie has been downloaded more than 300,000 times and sits in a now-crowded field: Natascha Frensch's Read Regular (2003), the British Dyslexia Association's recommendations of Arial, Comic Sans and Century Gothic, and later entrants such as Lexend. Boer's font still exaggerates asymmetry further than any of them — the original bet that wrong-looking letters are what dyslexic readers need.