I was curious about this, as well - from the links, it sounds like dyslexics rely more on the shape of whole words when reading, so fonts with pronounced ascend

I was curious about this, as well - from the links, it sounds like dyslexics rely more on the shape of whole words when reading, so fonts with pronounced ascenders and descenders (the stems and tails on t, j, etc.) may be easier to read. The opposite extreme would be WRITING IN ALL CAPS in a fixed width font, making every word into a rectangle.