Abstract
The precision of Vernier alignment and Nonius alignment (dichoptic Vernier) depends on gap size. We measured thresholds for monocular Vernier and dichoptic Nonius alignment of briefly flashed short lines. Over a large range of gap sizes, monocular Vernier thresholds are approximately a constant fraction of gap size (equivalent to a constant orientation threshold).
© 1986 Optical Society of America
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