The Bifixation Field as a Function of Viewing Distance

Figure 3

Predicted perceived Nonius/afterimage misalignments based on Wells [4] and Hering’s [2] laws of visual direction. In (a) the nasally directed eye precedes the temporally directed eye with associated perception of Nonius lines or afterimages; (b) same as (a) but for rightward gaze; (c) the nasally directed eye lags the temporally directed eye in leftward gaze with associated perception of Nonius lines or afterimages; (d) same as (c) but for rightward gaze. See text for more details.