Topic: Optical
"A study in the early 1970s showed that 25 percent of the U.S. population ages 12 to 54 suffered from nearsightedness, or myopia, which means they have trouble seeing things at a distance. A more recent study, from 1999 to 2004, showed the rate had soared to 41.6 percent. Americans spend $31.7 billion annually on vision products and services, according to the Vision Council of America. Eyeglass frames and lenses make up the largest portion, about $21 billion," according to a post on ChicagoTribune.
