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(a) When the eye of a monocular observer moves from left to right, the optic flow created by a pyramid-shaped surface is equivalent to that produced by a clockwise rotation of surface with respect to the observer’s line of sight (b). The same rotation of a surface with respect to the observer’s line of sight is created when the surface translates from right to left along a straight path in a frontal plane (c). Adapted from Rogers and Gyani, (2010).
