(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 Corn poppy (Papaver rhoeas) is a wild growing papaver species, which usually has got red tepals around a black center. This poppy is the largest and most common of three wild papaver species in Denmark, and it has got its name because it was earlier common as a weed in the corn.Its natural habitat is most of Europe, North Africa, Caucasus, Iran and the Indian subcontinent.he close relative Papaver somniferum, the opium poppy, is cultivated in many places for extraction of opium from the sap of the seed capsules. The opium poppy is about 30 -90 cm tall, it has large white or pale purple or variegated flowers during summer.