(1834â1908), Dutch ophthalmologist. Snellen was director of an eye clinic at Utrecht. In 1862 he introduced a test for measuring the acuteness of vision which consisted of printed letters or words in type of various sizes.
The poppy of wartime remembrance is Papaver rhoeas, the red-flowered corn poppy. This poppy is a common weed in Europe and is found in many locations, including Flanders, which is the setting of the famous poem In Flanders Fields by the Canadian surgeon and soldier John McCrae.
History of Opium, Morphine, and Heroin. As long ago as 3400 B.C., the opium poppy was cultivated in lower Mesopotamia. The Sumerians called it as Hul Gil, the 'joy plant.' The Sumeriansâ knowledge of poppy cultivation passed to the Assyrians, the Babylonians, and ultimately, the Egyptians.