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Slit lamp photograph showing a ring infiltrate in diffuse-illumination (a) and slit (b) views. (c) Corneal stroma showing diffuse loss of fibrokeratocytic nuclei with complete absence of inflammatory cells (periodic acid-Schiff staining, magnification, ×100). (d) Eosinophilic granular debris between the stromal fibers (hematoxylin-and-eosin staining; magnification, ×400).
