Cagdas Kaya1, Gabor Mark Somfai1, Heinrich Gerding1,2. 1. Augenzentrum, Pallas Kliniken, Olten, Switzerland (Director: Prof. Dr. Heinrich Gerding, F. E. B. O.). 2. Department of Ophthalmology, University of Münster, Münster, Germany (Director: Prof. Dr. Nicole Eter).