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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
The horizontal fraction bar was introduced by the Arabs.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Green tea is able to stop the scent of garlic or onion from causing bad breath.