This slit-lamp video shows a large, central corneal ulcer that was caused by fusarium fungus. Classically, fungal ulcers are described as gray, feathery borders, with satellite lesions. In reality, the only way to determine the real pathologic cause is with a good culture (molds take forever to grow and require a deep sample) and time course.
Fungal ulcers like this are difficult to treat and resolve slowly. The general medical therapy is topical amphotericin and oral/iv systemic coverage with fluconazole or voriconozole.
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fungalcorneahypopion.wmv (5.6 meg, Windows video file) fungalcorneahypopion.mov (Quicktime format coming soon)
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