What is the minimum field of view required for efficient navigation?
Hassan SE; Hicks JC; Lei H; Turano KA Lions Vision Center, Wilmer Eye Institute, Johns Hopkins University School of Medicine, 550 North Broadway, 6th Floor, Baltimore, MD 21205, USA. shassan3@jhmi.edu Critical points were computed to determine the minimum field of view (FOV) size required for efficient navigation. Navigation performance in 20 normally sighted subjects was assessed using an immersive virtual environment. Subjects were instructed to walk through a virtual forest to a target tree as quickly as possible without hitting any obstacles (trees, boulders, and holes). The navigation task was performed in three FOV and image contrast conditions under binocular, monocular, chromatic and achromatic viewing conditions. FOV was constricted to 10 degrees , 20 degrees and 40 degrees diameter and average image contrast was nominally high (11%), medium (6%) and low (3%). Navigation performance was scored as latency in walk initiation, walk time to reach goal and the number of obstacle co
