(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.
Submit. The Papaver somniferum plant, or Opium Poppy, is native to southeastern Europe and western Asia, producing white, pink, red or purple flowers in the summer and dropping its seeds in autumn.Best known for its hallucinogenic properties, Papaver plants are annuals and enjoy cooler but not freezing temperatures.he Papaver somniferum plant, or Opium Poppy, is native to southeastern Europe and western Asia, producing white, pink, red or purple flowers in the summer and dropping its seeds in autumn. Best known for its hallucinogenic properties, Papaver plants are annuals and enjoy cooler but not freezing temperatures.