Dig this: “Read Regular” is a typeface designed specifically to be legible to dyslexics. Among other things, letters that typically “mirror” one another — such as “b” and “d” — have been slightly tweaked so they are not, in fact, mirror images. That apparently helps dyslexics keep from confusing them, as the Read Regular web site explains:

Used in the content of words, sentences and text, the following or the previous character does not try to interfere in its readability process. Ascenders (bdfhkl) and descenders (gjpqy) are long to ensure their legibility. Inner shapes for example within the o, e, a, u and openings in e and g are kept open to prevent from visually closing in.

(Thanks to Boing Boing for finding this one!)