INTRODUCTION Do we know what the early visual system does? This question was the topic of a workshop at the SFN meeting ten years ago. Over the last decade, there has been tremendous progress in understanding the computations performed in the visual system, and how they are implemented by the neural circuitry. The purpose of this workshop is to gather both theoreticians and experimentalists in the field to take stock and debate about the current challenges when trying to understand the computations performed by the early visual system, and how they result from both bottom-up and top-down processes. CONFIRMED SPEAKERS Philipp Berens, University of Tuebingen, Germany Laura Busse, University of Tuebingen, Germany Matteo Carandini, UCL, UK Frédéric Chavane, INT, Marseille, France Karl Farrow, NERF, Belgium Yves Frégnac, UNIC laboratory, CNRS, Gif sur Yvette, France Charles Gilbert, Rockefeller University, New York, USA Tim Gollisch, University of Gottingen, Germany Peter Neri, Ecole Normale Supérieure, Paris, France Elad Schneidman, Weizman Institute of Science, Israel Andreas Tolias, Baylor College of Medicine, Austin, USA Shimon Ullman, Weizman Institute of Science, Israel REGISTRATION This workshop will take place in the European Institute for Theoretical Neuroscience ( http://www.eitn.eu/ ), Paris, January 19th and 20th. Registration is free but mandatory. We have a few slots for posters that will be presented during the meeting. If you are interested in presenting a poster. For registration and/or abstract submission, please refer to the workshop website: http://eitnconf-190116.sciencesconf.org/ On behalf of the organizing committee, Olivier Marre Institut de la Vision F-75012 Paris