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. 2024 Feb 14;627(8002):174–181. doi: 10.1038/s41586-024-07084-x

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© The Author(s), 2024, corrected publication 2024

Open Access This 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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Extended Data Fig. 1 — a, Eye tracking calibration procedure. As the animal views five points on a monitor, this information is entered into the program (ISCAN Inc.), which projects a crosshair indicating the animal’s point of gaze onto scene camera frames. b, Using the equation in panel a, pixel space of the scene camera is converted to degrees to identify when objects in the scene camera frames are within the receptive fields of neurons. Here, the animal’s shoulder and upper arm are within receptive fields. c, Raw traces of eye x and y coordinates, and pupil diameter recorded with the wireless eye tracker. The zero values at 1 second are due to a blink, while the zero values of x and y coordinates at 7 seconds are due to the animal viewing an object located out of the field of view captured by the scene camera. d, Number of objects (sorted) that DeepLabCut labeled in the scene camera frames from one session. e, Session-averaged percentage of scene camera frames out of total recorded that contained the crosshair for each monkey. M1: 2382652 frames labeled out of 2844338 total frames. M2: 1158612 frames labeled out of 2421325 total frames. Each circle is the percentage of crosshair labeled frames for each session. f, Histogram of fixation durations from one representative session that consisted of 12,378 fixations. 70% of the fixations were 200 ms duration or less. Illustrations in a were created using BioRender.