Figure. A) Spherical cysts of Dictyostelium spp. in potassium hydroxide (calcoflour white stain; original magnification ×40) preparation. B) Spherical double wall cysts of Dictyostelium spp. (Gram stain; original magnification ×100). C) Cornea of the patient’s left eye, showing a ring-shaped central infiltrate and central thinning. D) Corneal button showing Dictyostelium spp. cysts (arrow; hematoxylin and eosin stain; original magnification ×100).
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