(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.
The Origins of Opium. The earliest reference to opium growth and use is in 3,400 B.C. when the opium poppy was cultivated in lower Mesopotamia (Southwest Asia). The Sumerians referred to it as Hul Gil, the joy plant..