Potential Effects of Corneal Cross-Linking upon the Limbus

Figure 2

Scheme representing the limbus region untreated (a) and treated with CXL (b). In (b) the lids (superior and inferior) are lifted off and the epithelium is removed. In this case limbus might be only partially protected by the overlaying epithelium. In fact, even if the remotion is accurate, part of the limbus-protecting epithelium could be detached and lose its shielding properties. Moreover the reactive riboflavin is free to diffuse and to reach also the limbal region.