From the Utah State Office of Education passed down

“The term dyslexia is often used interchangeably with reading disability. Dyslexia is commonly used in medical settings, although the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) uses the term “reading disorder” instead. Some researchers use the term dyslexia in a narrow sense to refer to difficulty with accurate and fluent single word identification, or decoding. To avoid confusion, NASP advises school psychologists to use the term “reading disability”, rather than dyslexia, when referring to learning disabilities in the area of reading, and to reframe parents’ referrals and inquiries accordingly.” ©2007