Although many studies have been made upon the span of apprehension as measured tachistoscopically, and the effects of tachistoscopic training upon this apprehension, none could be found referring to the effects of tachistoscopic exposure upon perception. Since many industrial jobs today, particularly those involving inspections, require split-second perception, it seems important that some studies be made in this field. The present paper does not attempt to discover the loss of perceptive power upon tachistoscopic exposure, but is merely the first step in an attempt to determine the correlation between a standard vision test (in this case the Ortho-Rater) and tachistoscopic scores (at £ second exposure).