• Sign In to gain access to subscriptions and/or My Tools.
Impact Factor:1.482
Source:2014 Journal Citation Reports® (Thomson Reuters, 2015)

The Vertical Horopter is Not Adaptable and is Not Adaptive for Viewing Along the Ground

  1. M Banks
    1. University of Berkeley, USA
  1. martybanks{at}berkeley.edu


Helmholtz speculated that the pitch of the vertical horopter is an adaptation for perceiving 3D structure along the ground. We examined this claim by asking whether the horopter is adaptable (ie, whether it is different for people of different heights and whether it can be changed in response to distorting lenses) and whether it's adaptive (ie, whether it really is suited for perceiving along the ground). We find that it is not adaptable in that the pitch of the vertical horopter is not correlated with height and in that it does not change in response to one week of altered visual experience. We also find that it is not adaptive for viewing along the ground because the vertical horopter is a convex curve rather than a line. We speculate that it is adaptive for other aspects of natural viewing.

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License (http://www.creativecommons.org/licenses/by-nc-nd/3.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access page (http://www.uk.sagepub.com/aboutus/openaccess.htm).


This Article

  1. i-Perception vol. 2 no. 3 184
  1. Free via Creative Commons: CC