Peripheral Sterile Corneal Ring Infiltrate After Riboflavin–UVA Collagen Cross-Linking in Keratoconus

We hypothesize that the phototoxic effect on the corneal stroma may be the main mechanism that triggers these infiltrates. Alternatively, alterations in antigenicity that occur in native proteins after CXL could result in patients recognizing the proteins as nonself and mounting immune responses.