Jan 18, 2016

On Binocular Vision: The Geometric Horopter and Cyclopean Eye

BioRxiv : the Preprint Server for Biology
Jacek Turski

Abstract

We study geometric properties of horopters defined by the criterion of equality of angle. Our primary goal is to derive the precise geometry for anatomically correct horopters. When eyes fixate on points along a curve in the horizontal visual plane for which the vergence remains constant, this curve is the larger arc of a circle connecting the eyes' rotation centers. This isovergence circle is known as the Vieth-M&uumlller circle. We show that, along the isovergence circular arc, there is an infinite family of horizontal horopters formed by circular arcs connecting the nodal points. These horopters intersect at the point of symmetric convergence. We prove that the family of 3D geometric horopters consists of two perpendicular components. The first component consists of the horizontal horopters parametrized by vergence, the point of the isovergence circle, and the choice of the nodal point location. The second component is formed by straight lines parametrized by vergence. Each of these straight lines is perpendicular to the visual plane and passes through the point of symmetric convergence. Finally, we evaluate the difference between the geometric horopter and the Vieth-M&uumlller circle for typical near fixation distances and ...Continue Reading

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Mentioned in this Paper

Health Center
Vision, Binocular
Vision
Sample Fixation
Arcuate Sulcus
Eye Proteins
Objective (Goal)
Angular
NODAL gene
Structure

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