Fig. 2.

Representative images of IVCM at the depth of 200 μm for C-CXL (a–e) and EI-CXL (f–j). Keratocyte repopulation was detectable at all follow-up timepoint after C-CXL and EI-CXL, but the cell density was lower than baseline. Hyperreflective needle-shaped reflection could be observed for both protocols at 2 and 3 years after surgery. At 5 years after surgery, cell repopulation appeared more apparent in EI-CXL group (j) than that in C-CXL group (e)