1. University Hospital Basel, Department of Ophthalmology, Mittlere Strasse 91, 4031 Basel, SwitzerlandbBern University of Applied Sciences, Institute for Human Centered Engineering, Computer Perception and Virtual Reality Lab, Quellgasse 21, 2502 Biel/Bienn
2. Bern University of Applied Sciences, Institute for Human Centered Engineering, Computer Perception and Virtual Reality Lab, Quellgasse 21, 2502 Biel/Bienne, Switzerland
3. University Hospital Basel, Department of Ophthalmology, Mittlere Strasse 91, 4031 Basel, Switzerland