1 Institute for Ophthalmic Research, Bernstein Center for Computational Neuroscience, Center for Integrative Neuroscience, Tübingen University, 72076 Tübingen, Germany. katrin.franke@uni-tuebingen.de.
2 Institute for Ophthalmic Research, Bernstein Center for Computational Neuroscience, Center for Integrative Neuroscience, Tübingen University, 72076 Tübingen, Germany.