[1] Univ Hosp, Dept Ophthalmol, F-42000 St Etienne, France
[2] Inst Univ France, Blvd St Michel, F-75005 Paris, France
[3] Jean Monnet Univ, Corneal Graft Biol Engn & Imaging Lab, BiiGC, EA2521 Federat Inst Res Sci & Hlth Engn,Fac Med, F-42000 St Etienne, France