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. 2021 Oct 22;11:20881. doi: 10.1038/s41598-021-99846-0

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Examining the original 8 participants as well as an additional 4 participants with impairment to binocular function due to visual disorders reveals a relationship between the bias of gaze toward the body and stereoacuity. (a) Gaze density around footholds as in Fig. 3b, showing the binocular condition from the original participants and stereo-impaired participants, for medium and rough terrains. Error bars are $\pm 1$ SEM between participants. The dark blue curve shows the binocular conditions from Fig. 3b, and the light blue curve shows data for the 4 stereo-impaired participants. (b) Average footholds ahead as a function of participant stereoacuity. Average footholds ahead (y-axis) is calculated by taking the vector average of the gaze density around the foothold plotted in a (above). Stereo-acuity (x-axis) is measured as described in the Methods using the Randot metric. Correlation for the linear regression fits are shown in the Figure, with associated significance values.