The Predominant Theory is a theory that tells dyslexia is caused by a fundamental deficiency in the processing of phonological information. The Double Deficit Theory is a theory that tells dyslexics have a weak phonological awareness(of sound in words) and also tells that dyslexic suffers inherent problems in processing information at a given speed, which cause interference in many cognitive activities that includes reading and writing. Magnocellular Impairment Theory is a theory that tells dyslexics ' visual, learning, and processing issues are caused by a deficit in the magnocellular pathway. Cerebellar Impairment Theory is a theory that believes that the mild dysfunction of the cerebellum leads to an inability to effect the timed eye movements