In the UK the National Research and Development Centre for Adult Literacy and Numeracy (NRDC) which is help run the UK Governments "Skills For Life" program sponsorded a review of research on developmental dyslexia in adults.
The full report "Developmental dyslexia in adults: a research review - Report (pdf 0.99 MB)" can be downloaded from http://www.nrdc.org.uk/projects_details.asp?ProjectID=75 Includes as Appendix 1 from page 133, 28 definitions of dyslexia, 3 of which come from the UK British Dyslexia Association. Does thjis number of defintions mean that there is no agreement aboutr waht dyslexia really is, and as most of the research to date has being trying to define dyslexia as a condition, would these variations of defintion indicate that dyalexia is not a condition in its own right but more a shared symptom of a range of neurological information processing disorders such as Auditory Processing Disorder, Visual Processing Disorder, Scoptic Sensitivity (Irlen) Syndrome, etc