Many countries have laws prohibiting or limiting the importation of certain goods without the payment of customer duties, or taxes. Bringing in such goods without declaring them and paying the proper taxes is called smuggling. Franz Anton Mesmer, an eighteenth century Austrian physician, believed that people had in them a magnetic force similar to the magnetic force of certain metallic substances. Mesmer demonstrated that through his hands he could cause a person to fall under his magnetic power and to act as he instructed the person. Studies have shown that mesmerism, Mesmer's magnetic influence, does produce trancelike states, but Mesmer's basic theory has been disproved.
Contact lenses are plastic pieces that are worn on the eyeball and cover the pupil.
They usually cannot be seen, and many people prefer them to ordinary glasses for this reason. Certain defects in the shape of the cornea of the eye cannot be corrected by ordinary lenses but can be corrected by contact lenses, which are shaped to fit the cornea. Contact lenses do not frost in cold weather. Many athletes who cannot risk injury to their eyes from a blow to ordinary lenses wear contact lenses. In Greek mythology, Triton was the sea god who lived at the bottom of the sea.