This week, the BSIRG seminars had Dr. Georgi Georgiev (BSIRG visiting scientist) and Prof. Mário N. Berberan e Santos as invited speakers. Dr. Georgiev is a researcher at Biointerfaces and Biomaterials Laboratory, Department of Optics and Spectroscopy, School of Optometry, Faculty of Physics, St. Kliment Ohridski University of Sofia, Bulgaria. His lecture was entitled "Ocular Biointerfaces: From Surface Chemistry To Clinical Application". Prof. Berberan-Santos gave the lecture "Homo-FRET in cyclic molecular and supramolecular systems".