Veto, P;
Thomas, PBM;
Alexander, P;
Wemyss, TA;
Mollon, JD;
(2020)
‘The last channel’: vision at the temporal margin of the field.
Proceedings of the Royal Society B: Biological Sciences
, 287
(1927)
, Article 20200607. 10.1098/rspb.2020.0607.
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Abstract
The human visual field, on the temporal side, extends to at least 90° from the line of sight. Using a two-alternative forced-choice procedure in which observers are asked to report the direction of motion of a Gabor patch, and taking precautions to exclude unconscious eye movements in the direction of the stimulus, we show that the limiting eccentricity of image-forming vision can be established with precision. There are large, but reliable, individual differences in the limiting eccentricity. The limiting eccentricity exhibits a dependence on log contrast; but it is not reduced when the modulation visible to the rods is attenuated, a result compatible with the histological evidence that the outermost part of the retina exhibits a high density of cones. Our working hypothesis is that only one type of neural channel is present in the far periphery of the retina, a channel that responds to temporally modulated stimuli of low spatial frequency and that is directionally selective.
| Type: | Article |
|---|---|
| Title: | ‘The last channel’: vision at the temporal margin of the field |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1098/rspb.2020.0607 |
| Publisher version: | https://doi.org/10.1098/rspb.2020.0607 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10156243 |
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