In February, 2009, a 29-year-old man was referred by his general practitioner to our eye casualty with a 3-week history of a red, watery, and photophobic right eye. He had been treated with antibiotic ointment for a presumed conjunctivitis. His Snellen visual acuity in the right eye was reduced to 6/9, whereas his left eye achieved 6/4. On a low-power, slit-lamp examination of the right anterior segment, he had diffuse conjunctival injection as well as multiple corneal subepithelial infiltrates visible as scattered white spots (figure A). These initial findings seemed consistent with a viral keratoconjunctivitis.
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