Since his time as a postgraduate student at the Eye Clinic of the University of Munich Dr. Schaller showed a strong interest in ophthalmooncology. He was the first to highlight the use of serologic tumormarkers like \"Melanoma inhibitory activity \" (MIA) for early detection of metastatic uveal melanomas. \r\nDuring his time as a Lecturer at the University of Nairobi, Kenya(2004 - 2005) he worked on epidemiology of blindness in developing countries within the WHO program \"Vision 2020\" and infectious ocular disease. Since 2006 he developed together with the European Cyberknife Center, Munich, a new setup for stereotactic radiosurgery of uveal melanomas. This single fraction treatment helps to treat these patients with minimum of loss of quality of life. \r\nHolding a teaching position at the University of Munich he works currently at the University Teaching Hospital in Augsburg.\r\n Dr Schaller is member of national (DOG) and international scientific societies (e.g. ESOPRS, EACO).