As the use of virtual and augmented reality increases, it is important to understand how these technologies affect user performance. The introduction of stereoscopic remote vision system (RVS) technology in air refueling tankers means that the performance and level of visual fatigue of aircrew using stereoscopic displays are important operational factors to consider. Crosstalk occurs due to incomplete separation of the two images projected to the two eyes in a stereoscopic display and can degrade depth perception and cause discomfort and fatigue. A substantial amount of previous research has described measurement of crosstalk, compared crosstalk for different display technologies, and examined the effect of crosstalk on viewing discomfort. Additional research has examined the effects of crosstalk on stereoscopic image quality and on the magnitude of perceived depth from disparity and from monocular occlusions. The research described in this report shows that stereoscopic display crosstalk can substantially degrade depth discrimination under viewing conditions simulating a hyperstereoscopic RVS and could clearly be a performance limitation for tasks requiring accurate depth perception such as air refueling.