[1] Case Western Reserve Univ, Biomed Engn, Cleveland, OH USA
[2] Case Western Reserve Univ, Sch Med, Cleveland, OH USA
[3] Cleveland Clin, Cole Eye Inst, Oculo Motil & Vis Neurosci Lab, Cleveland, OH USA
[4] Louis Stokes Cleveland VA Med Ctr, Daroff Dell Osso Ocular Motor Lab, Cleveland, OH USA