Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
Horner's Syndrome is a condition caused by lesions affecting the nervous system and manifested by changes in the eye. The syndrome has been described in man and in animals and is characterized by enophthalmos, ptosis, miosis, and anhidrosis (due to paralysis of the sympathetic innervation of the eye).
Pauli, Monte L. and Carter, James D.
"Horner's Syndrome in a Cat: A Case Report,"
Iowa State University Veterinarian: Vol. 32
, Article 2.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol32/iss2/2