(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.
Brief Summary. Papaver somniferum, opium poppy, is an annual herbaceous plant in the Papaveraceae (poppy family) that originated in southeastern Europe and western Asia, and are now widely cultivated in Europe, Asia, China, and North Africa for their seeds, which are used in baking, as a condiment, and for their edible oil.
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.n New Zealand and Australia, soldiers are commemorated on ANZAC day (April 25), although the poppy is still commonly worn around Remembrance Day. Wearing of poppies has been a custom since 1924 in the United States.