Figure 9.

Natural-disparity statistics. A, Distributions of horizontal disparity along the vertical and horizontal meridians. Each panel plots the normalized probability of different disparities for positions along those meridians. The data from the 4 subjects were averaged. The plotted distributions were derived from weighted combinations of the data from the four tasks using a previous sampling method (Sprague et al., 2015). Left to right, Probabilities for different fixation distances: near (40–80 cm), intermediate (80–180 cm), and far (180–360 cm). Top, Bottom, Probabilities for the vertical and horizontal meridians, respectively. In each panel, brighter colors represent greater probabilities. Solid curves indicate the medians of the disparity distributions at each eccentricity. B, Median horizontal disparity at each position in the central 16° of the visual field for fixation distances in the range 40–8000 cm. Abscissa and ordinate indicate azimuth and elevation, respectively. The disparity values are indicated by color: darker color represents larger uncrossed disparity. White curve indicates where the median disparity changes sign from crossed to uncrossed.