1 Ophthalmology Department, University Hospital, Saint-Etienne, France.
2 Ophthalmology Department, University Hospital, Saint-Etienne, France; Corneal Graft Biology, Engineering and Imaging Laboratory, Federative Institute of Research in Sciences and Health Engineering, Jean Monnet University, Saint-Etienne, France. Electronic address: t.garcin@univ-st-etienne.fr.