Because the center of the visual field, the fovea, may project bilaterally to both RH and LH,[4] lateralized stimuli should appear sufficiently far from fixation. Researchers recommend that the inside edge of any visual stimulus should be between 2.5° and 3° from central fixation [2][5] Lateralized stimuli must also be presented very briefly, to eliminate the participant's ability to make an eye-movement toward the lateralized stimulus (which would result in the stimulus no longer being lateralized, and instead projected to both cerebral hemispheres). Since saccadic latencies to a lateralized stimulus can be as fast as 150ms following stimulus onset, the lateralized stimulus should only be presented for a duration of 180ms at most.[2]