Published date: March 9, 2019 12:21 pm
Lenses have been used for over 800 years to help improve eyesight. Initially, people used single eyeglasses, but this developed into a double frame containing lenses worn in front of both Eye simultaneously. Left and right lenses can differ according to the wearer’s requirements. Bifocals, trifocals and glasses with adjustable focus followed. And then in the latter part of the twentieth century, the use of contact lenses became widespread, especially with the advent of the first soft contact lenses in 1971, according to the timeline on the site of GP contact lenses. Contact lenses are small plastic discs worn in the eye. These are shaped to correct eyesight problems. Both glasses and contact lenses help to bend light rays and focus an image more sharply on your retina, improving your eyesight, by enabling your brain to receive a clearer picture of what you are observing.
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