Figure 1: Accelerated corneal collagen crosslinking Group 1 (epitheliumoff): Riboflavin 0.1% plus Dextran 20%, 15 min of corneal soaking, UV-A power at 12 mW/cm2, Energy dose at 7.2 J/cm2), 10 min exposure time. Left (a) white arrow: biomicroscopic picture of demarcation line after treatment. Right (b) white arrows: corneal OCT imaging revealing the demarcation line after A-CXL at about 180 μm of depth (range 150-200 μm).