The process of visual perception plays a crucial role in ensuring contacts with the external environment and the formation of human mental activity. The information that comes from the outside world, is the Foundation on the basis of which training is carried out and form their own experience. However, the role of perception is not restricted by this, it is involved in the organization of any business activity, ensuring its adequacy in the situation in which this activity is carried out. The obvious need for a study of visual perception in different age periods, with each period expressed significant differences from the others. In the scientific work shows the results of studies of the accuracy of perception of visual stimuli, and differential sensitivity thresholds of children of primary school age, the relevant age group from 7 to 11 years.