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. 2019 Sep 9;12(4):10.16910/jemr.12.4.2. doi: 10.16910/jemr.12.4.2

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Vergence points from eye rays distorted with zero-mean normally distributed errors (i.e. noise). Distance between two eyes is 6 cm and the object is at the distance of 50cm. Top row: the noise distribution has standard deviation of 0.5 degrees in both horizontal and vertical direction. Despite the relatively small error, the variation in depth is quite large. Middle row: standard deviation in vertical direction is only 0.16, but in horizontal direction it is 1.5. The noise in horizontal direction gets larger and the mean estimated point of vergence is shifted towards larger depths. Bottom row: standard deviation is 1.5 degrees in vertical direction and 0.16 in horizontal direction. Horizontal noise is small, but the mean estimated point of vergence shifts significantly towards the viewer. Same number of samples is drawn in each simulation. 10,000 points are current shown in the figure.