(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.
Opium is a drug made from the poppy plant. Poppies grow in many different countries but most poppies today are used to make heroin and opium is much less popular than in was i â¦ n the past. In the past opium was widely used for both medical and recreational purposes. Opium is not made, rather it is drained from the seed pods of mature poppy plants (of the opium variety). Once a mature plant drops its flowers, the seed pod becomes rip â¦ e after 5-12 days.