Description Block 13
Author: Rene Descartes (1596-1650).
Book: "Treatise on Man". (ca. 1664).
Notes: This illustration was published in multiple editions, but initially in a book printed 14 years after Descartes death. The illustration shows how light is reflected on the retina and sent from tubules to the pineal gland (the center of the soul) where the images from the two eyes converge into one.