From: The zone of comfort: Predicting visual discomfort with stereo displays Journal of Vision. 2011;11(8):11. doi:10.1167/11.8.11 Figure Legend: The zone of comfort in different units. (A) Comfort zone plotted in diopters. This is the same as Figure 17. The abscissa is the distance of the vergence stimulus and the ordinate is the viewing distance, which corresponds to the focal stimulus. The black diagonal line represents natural viewing (demand line). The red and blue lines represent estimates from our data of the far and near boundaries of the comfort zone, respectively. The parameters for lines are m near = 1.035, T near = −0.626, m far = 1.129, and T far = 0.442 (Equation 7). The dashed horizontal lines represent typical viewing distances for mobile devices, desktop displays, television, and cinema. (B) Comfort zone plotted in meters. The abscissa and ordinate are the distance of the vergence stimulus and the viewing distance (i.e., the focal stimulus), respectively. The abscissa and ordinate are plotted on log scales. The black diagonal line again represents the natural viewing line. The red and blue lines again represent the boundaries of the comfort zone. The dashed horizontal lines represent typical viewing distances for the same devices as in the previous panel. (C) Comfort zone plotted as on-screen disparity in meters as a function of viewing distance in meters. The abscissa is plotted on a log scale. The horizontal line represents the screen (where the disparity is zero). Positive disparities are crossed, specifying a stimulus nearer than the screen. Negative disparities have been adjusted upward slightly at long distance to reflect the fact that most viewers cannot diverge the eyes more than 1° beyond parallel; specifically, we set the maximum uncrossed disparity so that divergence would not exceed 0.85°. The vertical dashed lines represent distances for the same devices as before. The smaller plot in the upper left of this panel is a magnified view of the results at short distances; the dashed lines represent typical viewing distances for mobile devices and desktop displays. (D) Comfort zone plotted as disparity in degrees as a function of viewing distance in meters. The abscissa is plotted on a log scale. The break in the far boundary is a consequence of the adjustment described in (C). The vertical dashed lines represent distances for the same devices as before. Date of download: 10/19/2017 The Association for Research in Vision and Ophthalmology Copyright © 2017. All rights reserved.