The de-epithelialized group showed demarcation lines in the stroma (probably resulting from the migration of keratocytes), which did not necessarily represent a sign of cross-linking.

• 在去除角膜上皮组出线了基质内的分界线（也许由于角膜基质细胞的迁移引起），这并不一定就意味着是胶原间交联的标志。