Travelled the world doing maths-related work in academia and industry, taking deep pleasure in the variations of people and place. My publication co-authors range from archaeologist to brain surgeon, and my patents from magnetic resonance to document search, so I'm more fox than hedgehog. I enjoy finding that standard textbook facts are wrong, and I like it even more when a student proves me wrong. Since April 2013, working for which combines optics, image understanding, mechanical and IT engineering, etc., to fight blindness and the many diseases which afflict the eyes or just become visible there, in ways that can reach people who have never seen an eye doctor.