Fig. 2
From: An in vitro investigation into the impact of corneal rinsing on riboflavin/UVA corneal cross-linking
Corneal disks from Run 2 before (inset) and after collagenase digestion. After 33 h in 0.3% collagenase solution, most untreated samples (Group 1) were fully digested, but all CXL treated corneal disks (Groups 3–6) remained intact, showing enhanced resistance to enzymatic digestion. CXL, corneal cross-linking; BSS, balanced salt solution