Horner's syndrome is characterized by all of the following except:
Cycloplegia is not a feature of Horner's syndrome. Ref:Walsh and Hoyt's Clinical Neuro-Ophthalmology: The Essentials By Frank Buon Walsh, Nancy J. Newman, William Fletcher Hoyt, Neil R. Miller, Valerie Biousse, John B. Kerrison, 2007, Page 304
Miosis
Enopthalmos
Ptosis
Cycloplegia