Large-scale data from comparative studies of reading patterns in dyslexic and normal reade

Research also suggests an association with biochemical and genetic markers. However, experts disagree over the precise definition and criteria for diagnosis, and some advocate that the term dyslexia be dropped altogether and replaced with the term reading disorder or reading disability (RD). Because

However, dyslexia is not a visual problem that involves reading letters or words backwards or upside down, nor are such reversals a defining characteristic of dyslexia. Many individuals with dyslexic symptoms involving reading, writing, and spelling also exhibit symptoms in other domains such as poor short-term memory skills, poor personal organizational skills, problems processing spoken language, left-right confusion, difficulties with numeracy or arithmetic, and issues with balance and co-ordination.