Microscopic photo graphs of microsporidia in keratoconjunctivitis and stromal keratitis patients. a. Microscopic fluorescent, oval, well-defined microsporidial spores (KOH and calcofluor white, 400×). b. Oval, nonbudding, unstained (gram positive) with stippled internal staining microsporidial spores (Gram stain, 1000×). c. Paraffin-embedded histopathology section of corneal tissue showing oval, well-defined microsporidial spores from a case of stromal keratitis (modified Ziehl–Neelsen stain, 1000×). d. Gram chromotrope stain, 1000×.