‘You might think that seeing the world is a really easy matter,’ says psychobiologist Iris Groen. ‘But it’s actually a complex process that involves a large part of the brain.’ In September 2020 she was appointed as a MacGillavry fellow at the Informatics Institute of the University of Amsterdam. The big question she aims to answer with her research is: How does the human brain convert the rays of light that fall on your retina into the image in your mind?