You are answering a USMLE-style medical question. Question: A 45-year-old man presents to the physician because of a 1-day history of progressive pain and blurry vision in his right eye. He is struggling to open this eye because of the pain. His left eye is asymptomatic. He wears contact lenses. He has bronchial asthma treated with inhaled salbutamol. He works as a kindergarten teacher. The vital signs include: temperature 37.0°C (98.6°F), pulse 85/min, and blood pressure 135/75 mm Hg. The examination shows a visual acuity in the left eye of 20/25 and the ability to count fingers at 3 feet in the right eye. A photograph of the right eye is shown. Which of the following is the most likely diagnosis? Options: A) Angle-closure glaucoma B) Epidemic keratoconjunctivitis C) Herpes simplex keratitis D) Pseudomonas keratitis Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.