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Contact Lens Material
Introduced in the early 1970s, hydrogel lenses made contact lens wear much more popular because they typically are immediately comfortable. The only alternative at the time was hard contact lenses made of PMMA plastic (see below). PMMA lenses typically took weeks to adapt to and many people couldn't wear them successfully.
Contact lenses are an excellent choice for nearly anyone who needs vision correction but doesn't want to wear eyeglasses full time or undergo LASIK surgery.Contacts are more popular than ever. According to the U.S. Centers for Disease Control and Prevention (CDC), approximately 40.9 million Americans age 18 and older wore contact lenses in 2014 (most recent data available), which was about 9 percent of the adult population.