The first thing Jost Haas notices when he meets someone new is their eyes. He’s not unusual in this but, where you or I might notice them in a general way, he is noticing finer details. At first glance my eyes are brown. Jost would see that they are also grey-blue and green. I suspect he’d clock the contact lenses, too. As an ocularist – someone who makes artificial eyes – he can tell if an eye is real or not but insists nobody else should be able to: “If it’s a good fit, it’s barely to be seen”.

Jost works exclusively with glass, which is less usual. In fact, he is the last person making glass eyes in the UK. While most people who lose an eye will wear a plastic prosthetic, some choose not to. They might have always worn glass and feel most comfortable with it as a material, or they might have a plastic allergy.