 In surface dyslexia , words with regular pronunciations ( highly consistent with their spelling , e.g. mint ) are read more accurately than words with irregular pronunciation , such as colonel . Difficulty distinguishing homophones is a diagnostic used for some forms of surface dyslexia . This disorder is usually accompanied by surface <unk> and fluent aphasia . Acquired surface dyslexia arises when a previously literate person experiences brain damage , which results in pronunciation errors that indicate impairment of the lexical route . 
