The _______________________ refers to an imaginary circle that passes through the point of focus
a. horopter b. visual angle c.steroscope d. retinal globe
A. Horopter
The horopter - imaginary circle that passes through the point of focus. Objects on the horopter produce equal disparity in the two eyes.
The Vieth-Muller circle is a theoretical horopter. All points on this circle should stimulate corresponding points on the retina and lead to single vision, provided that the fixation point lies on the center of the circle and the eyes rotate about its nodal point (instead of their center of rotation). The Vieth-Muller circle assumes there is angular symmetry of the corresponding points
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