Dragons fight fantasy remix https://www.rawpixel.com/image/12670663/dragons-fight-fantasy-remixView licenseGetting ready for the sulphurersCollection:Images from the History of Medicine (IHM) Author(s):Wain, Louis, 1860-1939… https://www.rawpixel.com/image/9648407/image-background-face-catFree Image from public domain licenseVision and the mechanism for response to external stimuliCollection:Images from the History of Medicine… https://www.rawpixel.com/image/9652537/image-arrow-face-personFree Image from public domain licenseVision and visual perceptionCollection:Images from the History of Medicine (IHM) Author(s):Descartes, René, 1596-1650… https://www.rawpixel.com/image/9653427/image-arrow-face-flowerFree Image from public domain licenseLiefkozend paar (1771) by Louis Marin Bonnet, Pierre Antoine Baudouin and Louis Marin Bonnet https://www.rawpixel.com/image/13781225/image-paper-face-personFree Image from public domain license