Llewellyn is a paediatric neurosurgeon. Having encountered a vast number of devastating conditions affecting little children, and having performed many complex surgical procedures on the tiniest of little beings, found himself developing a burgeoning interest in exploring innovative, non-invasive techniques to diagnose and guide the treatment of critical conditions affecting the brain. From this interest, evolved a natural leaning towards using ultrasound as a safe, radiation-free modality, particularly to harness the access portals provided by the natural windows in the skull, most notably the eye, to acquire vital information on the brain. He has given numerous talks at national and international meetings, written scholarly articles on this topic, and this work has resulted in a very productive collaboration with one of the world’s leading navigation institutes.