Images of confocal microscopy of patients with sterile corneal infiltrate after cross-linking procedure. (A) Stimulated epithelial cells with visible cell nuclei. (B) In the layer of epithelial cells, there are round inflammatory cells (circle), single Langerhans cells and hyperreflective apoptotic epithelial cells (larger than the inflammatory cells-arrow). (C) In deep layers of the epithelium and Bowman’s layer, there are numerous Langerhans cells with protrusions (arrow). (D) Oblique scan-from bottom, a layer of stimulated epithelium through the Bowman’s layer with LG cells, hyperreflective fibrous tissue visible in anterior stroma (from top).