Variations in body posture were evaluated in 19 blind and 19 sighted adults
by changes in the subjects' center of foot pressure on a force plate in ti
me in three positions. The subjects who were blind had significantly larger
body sway than did the sighted subjects in all trials except those in the
sound position, where they had a better control of their stance than did th
e sighted subjects, and their body oscillations were also reduced in the fo
rward-looking position. Thus, sound or proprioceptive adjunctive inputs can
significantly alter body sway in adults who are blind.