This paper describes four syndromes of acquired dyslexia in adults: deep (phonemic) dyslexia, surface (semantic) dyslexia, phonological dyslexia, and letter-by-letter reading (word-form dyslexia). Each description inquires whether reading performance is (1) sensitive to dimensions of words; (2) affected by experimental manipulations; and (3) relevant to theoretical issues. (Author/SJL)