My son is severely dyslexic.
He has prescription reading glasses as he has a "rugby ball shaped eye" and needs some help. He does better with a blue overlay, but the optometrist put blue lenses in his reading glasses. This helps massively, and means he can work/read on white pack grounds easily.
He gets some help in school with one to one, but I now pay for private tutorship once a week. This has helped massively.
At home, I just encourage reading, sit side by side and help. Using a ruler or a blank piece of paper helps minimise how many lines of text he sees at one time.
Game ways, for letter recognition I used to draw the letters on A4 pieces of paper and then I'd shout the letters out and he would jump on to the correct letter. Then we moved on to high frequency words like "the" "and" "it" "I" and he jumps onto them. Lots of jumping and giggling.
We also used to on the dinging room table use fun things like shaving foam to draw letters/words, or play sand in a baking tray to trace with fingers. Messy but good fun.
DS is great at maths though, thoroughly enjoys it. So maths I haven't needed to alter.