(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.
As the cultivation of the opium poppy flourished, the product was exported to both Europe and India(1-9). China, India Arab traders brought knowledge of the medicinal uses of the opium poppy to the Chinese sometime between the 11th and the 13th centuries AD.