1. Department of Medicine and Ageing Sciences, Ophthalmology Clinic, University “G. d’ Annunzio” of Chieti-Pescara, Chieti, Italy
2. Department of Medicine and Ageing Sciences, Visual Science Laboratory, CeSI, University “G. d’ Annunzio” of Chieti and Pescara, Chieti, Italy
3. Ophthalmology Clinic, University of Verona, Verona, Italy