You don't say how old your child is but we did the PACE tutoring system with our special ed teacher - one summer and they use a metrenome within the system.
I have to say I saw great changes and I think it helped both my children.
The oldest is not dyslexic but he did the system along side his younger severely dyslexic child. Our special ed teacher came across the program and liked what she saw - so trained in it and brought the program to our area. She does other things as well - so he's been exposed to OG, Slingerland and lots of other things for her. I'm a believer in exposing them to as much as possible - she also had a sound therapy she wanted us to try - which we did not have the funds for at the time. We have not done vision therapy but we did have special reading classes (tinted) for him which I believe helped.
So back to the metronome therapy - I know my older son used this to help him with learning spelling words - he would create a beat and tap it out in his pocket when sitting in class to remind him of a word
my dyslexic one would use a basket ball to create the beat - hey whatever works right?
I think some people will think it all a bit odd but it appeared to work. Now my dyslexics spelling is way below year average - but he can use these systems to pass his weekly testing and that's what counts. My thoughts are whatever it takes you to get through school - once out of school you can decide what you want to be - and many very intelligent / dyslexic CEO's are out there.
reading is never going to be his forte so eventually we were exposed to books in Audio format and he gets all his text and reading books through Learning Ally - but I know he still uses these tips and techniques he learned in PACE. Another thing they learn in their is word recognition and memorization (something he was struggling with). He reads at least two year below grade level without Audio books but his comprehension is about five years above grade level.
hope some of this helps you decide what to do next - it's such a journey for us and for them