Fig. 15 Oculosympathetic paresis. A. Congenital Horner's syndrome. Note partial ptosis, miosis, and lighter iris. B. Positive cocaine test in 45-year-old patient with right side headaches and oculosympathetic paresis (Raeder's syndrome). Note that cocaine 4% dilates normal left pupil only. C. High cervical (“Hangman's”) fracture with quadriplegia and right Horner's syndrome. Note spontaneous sweating of left side of face only. In (B) and (C), lid fold (arrow) is diminished.