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. 2022 Nov 17;12(11):1039. doi: 10.3390/bios12111039

Figure 2.

Figure 2

EOG detection systems. (a) An anatomical illustration of the eye (cornea being positive and retina being negative). (b) Positions of electrodes for EOG detection (reprinted under terms of the CC-BY license [51]. Copyright 2017, the authors. Published by MDPI). (c) Conventional Ag/AgCl electrodes. (d) Example of a stiff material (metal disc) (Reprinted with permission [86]. Copyright 2013 Institute of Physics and Engineering in Medicine). (e) Exiting EOG devices with conventional gel electrodes (Left: Reprinted with permission [81]. Copyright 2009 Elsevier, Middle: reprinted with permission [60]. Copyright 2018 Elsevier, Right: reprinted under terms of the CC-BY license [37]. Copyright 2021, the Authors. Published by MDPI). (f) Exiting EOG devices with dry metal electrodes (Reprinted under terms of the CC-BY-NC license [87]. Copyright 2018, the Authors. Published by Springer Nature).