Review Question - QID 215030

A 34-year-old previously healthy woman presents to her primary care physician with a 3-week history of worsening red eyes and watery discharge. She denies any ocular pain, but says her eyes always feel mildly irritated as if there were grains of sand stuck in her eyes. She has noticed that her symptoms worsen when she goes out for her daily jog around the neighborhood. The patient otherwise denies any recent changes in her health including fatigue or weight loss. Her only medication is a daily multivitamin. Her temperature is 98.8°F (37.1°C), blood pressure is 128/66 mmHg, pulse is 76/min, and respirations are 12/min. On physical exam, the patient is a well-appearing woman with flushed facial skin. Ocular examination reveals mild conjunctival injection bilaterally as well as many small, dilated vessels close to the skin surface along the lid margins. The remainder of her exam appears normal. Which of the following is the most likely diagnosis?