I have other players read out information from my dyslexic player's character sheets when necessary, and I use non-verbal visual aids whenever possible. I generally give out copies of any important visual aids, such as maps, riddles, or red herrings, to be contained in a player binder that can be referenced whenever anyone feels the need to review. The players are all responsible for doing their part to keep the game running smoothly, such as tracking experience and treasure. Generally, my dyslexic player moves minis around a map while my autistic player focuses more on tactics and keeping up general party paranoia.
I plan to start incorporating auditory clues to signal different segments of the game, such as the start of a session, breaks, and ending the session. I will also make up notes in the OpenDyslexic font and see if that helps make things easier.
EDIT: The major problems I run into are my dyslexic player has trouble keeping track of details regarding her character and the other characters, since looking at character sheets tends to bother her, and that hurts her ability to really get into character. My autistic player often wanders off into "what if" territory, even during combat, such as "what if this unarmed kobold here were actually the leader of a second band of kobolds, and is going to come back and kill us later if we let him live?" That's not a problem itself, of course, but the other players get annoyed with the frequent divergences from what is going on in the game, and momentum stalls while the game drags on.
I would like a better way to help her keep track of mechanical minutiae, and a better way to help keep him a bit more focused during the games.