Comment by mrob

One dyslexia font was tested and found to have the same legibility as normal fonts:

"Dyslexie font neither benefits nor impedes the reading process of children with and without dyslexia."

https://link.springer.com/article/10.1007/s11881-017-0154-6

I'm skeptical that any of these fonts actually make a difference. (Although if you like Comic Sans, you might as well continue using it; it doesn't do any harm.)