(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.
While the California poppy does contain some sedative alkaloids, it contains no real opium. The most common use of this herb is in diffusion for treating the various physical and psychological conditions including insomnia, bedwetting (incontinence), anxiety and nervous tension, particularly in children.