Horner syndrome (or oculosympathetic paresis) results from an interruption of the sympathetic nerve supply to the eye and is characterized by the classic triad of miosis (ie, constricted pupil), partial ptosis, and loss of hemifacial sweating (ie, anhidrosis), as well as enophthalmos. By: https://www.instagram.com/tv/CdSUE01jduK/?igshid=YmMyMTA2M2Y=