Binocular Mirror-Symmetric Microsaccadic Sampling of Hyperacute 3D-Vision
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Joni Kemppainen, Ben Scales, Keivan Razban Haghighi, Jouni Takalo, Neveen Mansour, James McManus, Gabor Lego, Paulus Saari, James Hurcomb, Andra Antohi, Jussi-Petteri Suuronen, Florence Blanchard (+11 others)
2021
Abstract
Neural mechanisms behind stereopsis, which requires simultaneous disparity inputs from two eyes, have remained mysterious. Here we show how ultrafast mirror-symmetric photomechanical contractions in the frontal forward-facing left and right eye photoreceptors give Drosophila super-resolution 3D-vision. By interlinking multiscale in vivo assays with multiscale simulations, we reveal how these photoreceptor microsaccades - by verging, diverging and narrowing the eyes' overlapping receptive fields - channel depth information, as phasic binocular image motion disparity signals in time. We further show how peripherally, outside stereopsis, microsaccadic sampling tracks a forward flying fly's optic flow field to better resolve the world in motion. These results change our understanding of how insect compound eyes work and suggest a general dynamic stereo-information sampling strategy for animals, robots and sensors.
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Date 2021-05-04
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