The visual display presents a major source of critical information to the pilot in a flight training simulator. At the same time, due to underspecification or underdesign of the visual display system, the information presented to the pilot is grossly incomplete. If the pilot saw in the real aircraft as well as he sees in the simulator, he would not be allowed to fly (or even drive a car): he would be legally blind! These problems in the visual display are the result of misapplication or misunderstanding of the pilots visual perceptions and the limitations of resolution and scene detail of the visual display. This paper presents a summary of the principles of limiting resolution and the definition of scene detail, as well as a discussion of other visual parameters; and the importance of these factors in obtaining satisfactory standards in initial and continuation training in a flight simulator.