It's not that IDEA does not include dyslexia, or that there are special rules to keep kids from dyslexia out of special education. Dyslexia is a medical diagnosis. There's usually nobody in the school district qualified to diagnose it, and the label itself tells educators nothing that they can use that cannot be tested some other way.

As I recall, there is a question that has to be asked in the eligibility meetings for all the eligibility categories. "Does the child need specially designed instruction in order to benefit from a free and appropriate public education (FAPE)?" If the answer to that question is no, the student does not need special education and does not qualify for it.