Abstract—Authors decided to conduct a comparative study aimed to assess the occurrence of changes in the organ of vision in people who train in a truck simulator and the evaluation of differences in type and frequency during training on simulators with "on screen" and cylindrical displays. The same they decided to make an attempt to give the preliminary answer to a question which from studied projection systems causes lesser degree of symptoms of simulator sickness during training. This paper presents the results of comparative tests carried in consortium by Police Academy in Szczytno, Poland as a part of scientific project "Building simulator of driving privileged vehicles in typical and extreme situations". For the purposes of examinations two test platforms were prepared. One equipped with a screen with a cylindrical projection system, the second with "on screen" projection system.