The ELZA team of surgeons and researchers were all in attendance, and today saw Prof. Hafezi give the attending delegates a lecture on “How to treat thin corneas”, where he examined the history of performing corneal cross-linking (CXL) for the treatment of corneal ectasias like keratoconus. He then brought delegates up-to-date on the research that has been performed over the years to improve how thin corneas are cross-linked. Finally, Prof. Hafezi demonstrated the results of the latest thin cornea cross-linking protocol, sub400, developed by ELAZA, which simplifies the process, and can let surgeons, for the first time, cross-link corneas that are as thin as 200 µm.