Evidence suggests that dyslexia results from differences in how the brain processes writte

The most predominant form of dyslexia identified by researchers is the dysphonetic or auditory subtype, which is associated with difficulty connecting sounds to symbols, and attendant difficulty with sounding out words. The American physician Elena Boder, who developed the Boder Test of Reading-Spel

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.