Methodological caveats for monitoring binocular eye position with Nonius stimuli

摘要: Three experiments, using two sets of Nonius lines placed in a random-dot stereogram, indicated that alignment does not always reflect binocular eye position and, thus, caveat is necessary when used to monitor position. We found that: (a) with visual line values differed by up 7.6 min arc can appear aligned; (b) the each continued aligned despite change vergence angle 5.9 arc; and (c) reflected better, dots near were eliminated.