(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 Persian white poppy is the species of the Papaver somniferum opium plant from which poppy seeds and opium are extracted. The white poppy blooms between late spring and early autumn to produce white or near-white flowers. The plant contains the opiates narcotine, codeine, codamine, papaverine, narceine and thebaine.ts seeds are commonly used in cooking when baking muffins, cakes and bagels. The Central Intelligence Agency lists Papaver somniferum as an illicit drug. As of May 2010, growing Papaver somniferum opium plant is illegal in the United States. The opium poppy is extensively cultivated in China, India, Persia and Turkey.