Sehscharfe des auges bei horizontalen folgebewegungen

The reduction of visual acuity as depending on target speed was determined for tracking movements of the eye when it is following the horizontal movement of a bright Landolt ring. The tracking movements were registered at the same time encephalographically. Using the results obtained it is illustrated that with high speeds (more than 60°/sec) the image movement over the retina is the main cause for the reduction of visual acuity, while for lower speeds (less than 50°/sec) the reduction is mainly due to the imaging of the target outside the central region of the fovea.