A 50-year-old man presents with a 2-week history of vision problems. He is not on any medications and has a 60 pack-year history of cigarette smoking. His past medical and surgical history are otherwise unremarkable. On examination of his right eye, both ptosis and miosis are noted. A chest X-ray shows a rounded opacity in the right lung field.

Due to a disruption in the sympathetic nerve supply, Horner syndrome is an uncommon disorder that typically manifests as partial ptosis (drooping or falling of the upper eyelid), miosis (constricted pupil), and face anhidrosis (lack of sweating). However, there have been a few rare instances of congenital types of Horner syndrome, which are typically acquired after injury to the sympathetic nerve supply.

Damage to a specific sympathetic nervous system circuit results in Horner syndrome. The sympathetic nervous system controls your heart rate, breathing, sweating, blood pressure, and other bodily processes that let you react swiftly to environmental changes. Smaller pupils, drooping eyelids, and little to no perspiration on the affected side are all symptoms.

Learn more about Horner syndrome here: https://brainly.com/question/26810998

#SPJ4