Part A courtesy of Sander Dubovy, MD; part C courtesy of Hans E. Grossniklaus, MD; part D courtesy of Tatyana Milman, MD; part E courtesy of George J. Harocopos, MD.
File Size:
701 KB
Ocular Pathology/Oncology
Keratoconus. A, Clinical appearance. B, Low-magnification view shows apical stromal thinning (arrow). C, Masson trichrome stain demonstrates focal disruption of Bowman layer (arrow). D, Prussian blue stain demonstrates intraepithelial iron deposition (Fleischer ring). E, In a patient with prior hydrops, PAS stain highlights rupture of Descemet membrane, with rolled-up edges on either side (arrows).