(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 U.N. Office of Drugs and Crime (UNODC) estimated that the total area under opium poppy cultivation used in the illegal drug trade was 195,700 hectares in 2010, an increase of 5% from 2009 levels. The area cultivated in Afghanistan was 63% of the global total for both years; other major producers included Myanmar and Mexico.