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. 2018 Nov 12;9:2200. doi: 10.3389/fpsyg.2018.02200

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Copyright © 2018 Chieffi, Messina, Villano, Messina, Ilardi, Monda, Salerno, Sessa, Mollica, Cavaliere, Trinchese, Cimmino, Murabito, Catapano and Monda.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Schematic illustration of a virtual gaze plane (a) crossing the radial line in central viewing condition (LE: Left Eye; RE: Right Eye). Note that proportions of elements are not naturalistic.