Alignment in motion: Fall risk in spine patients and the effect of vision, support surface, and adaptation on the cone of economy oleh Ram Haddas, PhD, Manjot Singh, BS, Paul Rubery, MD, Ashely Rogerson, MD, Andrew Megas, DO, Robert Molinari, MD, Gabriel Ramriez, MS, Tyler Schmidt, DO, Alan H. Daniels, MD, Bassel G. Diebo, MD, Varun Puvanesarajah, MD