Dyslexia is a neurological disorder with biochemical & genetic markers. It is a disability which a person reading and/or writing ability is lower than his or her grade level of intelligence. However, people may read and write perfectly and have dyslexia. They are diagnosed with the disorder when their problems can't be explained by a lack of intellectual ability, inadequate instruction or problems such as poor eyesight. Being as it is a complex mental process, it can have many potential causes. From a neurophysiological perspective, it can be diagnosed by closer inspection of the brain. It is associated with phonological problems.

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