How to choose the best cross-linking procedure in 2016 by Nikki Hafezi | Jan 28, 2016 | Assessing Technology, Industrial Relations | European Ophthalmic Review. Epi-on or epi-off? Accelerated or not? A review from Nikki Hafezi and Farhad Hafezi on the current state of the art for CXL treatment of progressive keratoconus. Read the review here.