(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 opium fields of England: Pictures show the flowers blooming in Britain to make morphine for the NHS. At first glance these pictures show depressingly familiar scenes of fields of poppies in the wilds of strife-hit Afghanistan - soon to be processed into heroin and shipped around the world. But these scenes were actually captured at an 88 acre farm near Winchester in Hampshire.