The purpose of this experiment is to evaluate visuospatial and visuomotor cognitive function of the normal healthy subjects. Estimation of motion in blinded spatial environment requires focused attention and reaction time involving cognitive functions. Focused attention and reaction time also relates to the involvement of retrospective memory and prospective memory. The task was carried out on a computer screen where the subjects followed an object in motion that disappears at specified distance and triggering the stop button when the object reaches a specified target. Group #1 performed a visual motion task with no feedback (object do not reappears upon target triggering) and group #2 with feedback (object reappears upon target triggering). Results showed object disappearance duration and feedback conditions affected difficulties in estimating the target.