History of the discovery of Glasses

Just imagine if you or a friend who has a visual impairment ( minus / plus ) does not use glasses . Well, yeah it would be difficult to see objects that are far away / close . Glasses is one of the most important discoveries in the history of human life . Like what the heck , the origin ditemukanya glasses ? Let 's find out ...

Islamic civilization has come to know and find the lens over three hundred years earlier than the European society . The lens is also known in some civilizations such as the Roman , Greek , Hellenistic and Islamic . At that time , the lenses are not used for magnification , but for burning . You do this by focusing sunlight on a focal lens / lens focal .
Glasses were first discovered around 3000 years ago by the people in the old city of Nineveh , which at that time was as a magnifying glass function . The materials used are also not a stone but a crystal glass lens . Development of new glasses then bolted the XII century in China and Europe . At that time, the ancient Greeks use glass ball filled with water as a magnifying glass .
Then in 1268 Roger Bacon , a British scientist , find reading glasses . And in the 1300s eyewear began to be produced with the manufacture center in Venice . But it's not like the glasses while now . Simple lens quality , and its use is also troublesome .
Various kinds of experiments were conducted to find the best and safest way to wear glasses . There were installing metal plates mounted long from nose to goto the middle and then head down to the neck . There is a small chain installed on both sides of the goggles and strapped on the back of the head , such as goggles , there's another tie on hat sunglasses . There are affixed to the bridge of the nose so that the wearer should continue to hold him . Until finally in 1727 , the idea to put the stalk so that the glasses can be attributed to the ear .
Subsequent developments , in 1784 Benjamin Franklin managed to find glasses bifokus , which has a convex lens and a concave lens in a single frame . Until 1884 was also produced bifokus lenses are made from the pieces , though it was sticky . It was only in 1908 and 1910 known convex and concave lenses are completely fused in one lens .

Glasses 18th century

Lens material was also developed , which first of quartz , glass lens made ​​subsequently . In 1970 found a plastic lens material as other materials for the manufacture of spectacle lenses . Eventually more and more people using glasses and growing kacamatapun frame with different types of models .
Photo : engineeringtown.co / teagleoptometry.comFrom various sources