**7. Conclusions**

Intraoperative OCT can be used safely and effectively to monitor corneal pachymetry during CXL. Among the advantages of this technology is its ability to provide a more detailed profile of the corneal thickness in a noncontact manner, which is especially advantageous for monitoring corneal pachymetry in the setting of CXL in KCN patients compared to the conventional ultrasound method. OCT has also been used for evaluation of other aspects of the CXL procedure like evaluation of in vivo riboflavin penetration in to the corneal stroma.
