Figure 6: Confocal microscopy; left side is epi-off CXL and right side is epi-off CXL. (a and e) Subepithelial basal membrane, (b and f) anterior stroma, (c and g) midstroma, (d and h) deep stroma, (e) subepithelial nerve (red arrow), (b) intense apoptosis and haze, (f) mild apoptosis, (c) several keratocytes, apoptosis, (g) very mild apoptosis, (d and h) normal deep stroma. CXL=Corneal collagen cross-linking