Due to concern that current U.S. Air Force depth perception standards and test procedures may not be adequate for accurately identifying aircrew medically fit to perform critical depth perception tasks during flight, the U.S. Air Force School of Aerospace Medicine developed a stereoscopic simulation environment to investigate depth perception vision standards. The initial results of this research showed that while the use of stereoscopic displays clearly improved performance for a helicopter landing task involving depth judgments, an individual's stereo acuity was not predictive of performance. However, landing task performance could be predicted when stereo acuity was used together with binocular fusion range. However, motion perception was a better predictor of performance than stereo acuity. Potential implications for medical vision standards and the potential complexities involved in predicting real-world performance based on performance in a stereoscopic flight simulation are discussed.