1 Vision Sciences Study Center, Faculdade de Medicina, Universidade de Lisboa, 1649-035, Lisboa, Portugal; Vitreoretinal Unit, Royal Victorian Eye and Ear Hospital VIC 3002 East Melbourne, Melbourne, Australia. Electronic address: davidscsousa@gmail.com.
2 Vision Sciences Study Center, Faculdade de Medicina, Universidade de Lisboa, 1649-035, Lisboa, Portugal; Ophthalmology Department, Centro Hospitalar Universitário Lisboa Norte, 1649-038, Lisboa, Portugal.