SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
This is an early anatomical drawing (c.1489) by Leonardo da Vinci (1452-1519) and depicts vertical and horizontal sections of the human head and eye. It is a translation into a drawing of a description by Avicenna, the philosopher-scientist of the medieval Islamic world. Leonardo drew on Greek, Arab, and medieval views in his representation of the structure of the eye and the cerebral ventricles of the brain.
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