(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 morphine poppy, Papaver somniferum, was first grown commercially on British farms in 2002 and now it can be seen around Dorset, Lincolnshire, Oxfordshire and Hampshire. This spectacular field will flower, then the crop will be left to die off and dry out before it is harvested with special machinery.