Dyslexia is just the overall name for a learning disability that causes difficulty with reading or writing. There is no unified cause or group of causes, it's

Dyslexia is just the overall name for a learning disability that causes difficulty with reading or writing. There is no unified cause or group of causes, it's all based on symptoms. Therefore, the only things that will "work" for all dyslexics are things that fundamentally make reading and writing easier for everyone and not just dyslexics. So something like a font can help in the same way some fonts are easier to read than others, but the idea of a "dyslexia font" is a little silly.