(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.
(Photo: AP). Papaver somniferum, one of the few species of poppy that produces opium, is an annual plant with a growth cycle of 120 days. Farmers plant seeds, which range in color from white to yellow to brown and gray, in shallow holes.apaver somniferum, one of the few species of poppy that produces opium, is an annual plant with a growth cycle of 120 days.