Dyslexia is explicitly mentioned in the IDEA 2004 statute (Sec. 602(30)(B)) and regulations (Sec.300.8(c)(10)) as part of the definition of 'specific learning disability' (SLD).
Further, the terms of dyslexia and dyscalculia are mentioned as specific subtypes of learning disorders in the Diagnostic and Statistical Manual of Mental Disorders (DSM-V) (see p. 67). Thus, it is appropriate to make specific mention of these subtypes of specific learning disorders in an IEP.
How Print May Look to a Dyslexic
Sources: IDAKY, American Dyslexia Association, The Dyslexia Center, The Dyslexia Foundation, The Child Mind Institute, Sally Shaywitz