Shift In Depth Research Articles

Do depth shifts resulting from an interocular delay in stimulation result from a breakdown of binocular fusion?

Previous studies have shown that the introduction of an interocular delay in presentation to the two eyes of a briefly viewed, haploscopically presented object resulted in a rearward shift in the depth position of this object. The present study investigated the magnitude of this depth shift as a function of flash duration and determined the relationship of this magnitude to two-flash and simultaneity thresholds. It was found that depth shift magnitude decreased as flash duration increased, and that large depth shifts were associated with large two-flash thresholds. The hypothesis that depth shifts can occur within the temporal limits of binocular fusion was supported.

The influence of the equidistance tendency on depth shifts resulting from an interocular delay in stimulation

An earlier study showed that the introduction of an interocular delay in presentation to the two eyes of a briefly viewed, haploscopically presented object resulted in a rear ward shift in the depth position of this object. The present study was designed to determine whether an equidistance tendency (ET) which opposed this direction of shift could reverse or modify the degree of shift. It was found that an opposing ET did attenuate the degree of depth shift, but did not reverse the direction of shift. Implications of this finding for the explanation of the depth shift phenomena are discussed.