I've read through that study before when I was reading about fonts for dyslexics a long time ago. The study didn't come to any conclusion and even states itself

I've read through that study before when I was reading about fonts for dyslexics a long time ago. The study didn't come to any conclusion and even states itself that the same size was too small and further studies needed to be done. Specifically, some major points where the study needs to be more robust are: 1. font comparisons 2. age range (university students were tested, but these fonts will most likely have the greatest effect on younger people who have not learned to adapt to being dyslexic) 3. languages Overall, there isn't evidence either way. But there is one thing that the studies consistently find, that the majority of dyslexics, both anecdotally and from the participant pool, have a favorable opinion of the font compared to normal ones. For that reason alone, I think it would be wise for Amazon to include such a font on the Kindle.