Descartes' illustration of how distance of object is perceived with binocular vision. From Rene Descartes 'Opera Philosophica', 1692 (Tractatus de homine) Woodcut

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Photo credit: © World History Archive / Alamy / Afripics
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Keywords: 1692, archival, archive, binocular, descartes, distance, french, historical, history, illustration, medicine, object, opera, perceived, philosophica, physiology, rene, vision., woodcut