Review Question - QID 214272

A 55-year-old man presents to the emergency department with a 1-hour history of transient vision loss in his right eye. The vision loss occurred only in his right eye, and it has never happened before. He describes the vision loss as "complete blackness" that lasted about 5 minutes before his vision started returning back to normal. At this time, his visual symptoms have completely resolved. He has a medical history of hypertension, hyperlipidemia, and diabetes mellitus. His temperature is 98.6°F (37°C), blood pressure is 136/92 mmHg, pulse is 79/min, respirations are 13/min, and oxygen saturation is 98% on room air. Which of the following physical exam findings is associated with the most likely risk factor for this patient's presentation?