We are developing methods to accurately measure binocular 3D eye position during rapid head rotations using a novel technique developed by Dr Migliaccio. This system will be used to measure VOR function during (physiologically relevant) high velocity head rotations. The goal is to make this the world's first cost-effective, portable, accurate video-oculography system specifically designed for widespread clinical use. This work will be done in collaboration with the University of NSW and the University of Sydney.