HISTORICAL GLASS EYE

Eyes are cendela world, and the eye is the lamp of the body; eye we can see the world with our eyes can see something.Can you imagine if people do not have eyes? the world will be dark. What if your eyes were impaired either because the minus and plus that requires you to wear glasses. But since you are such a situation when you do not wear glasses you will see things in the shadows is not clear. Yah It would be difficult to see objects that are far away / close. Eyeglasses are one of the most important discoveries in the history of the human race. Currently goggles function not only as visual aids but has become a fashion trand, so that even normal but always wear eye goggles (neutral). And for some people wear glasses justri add beauty or his courage. But do you know the origin of the discovery of a glass eye?

Glasses were first discovered around 3000 years ago by people in the old city of Nineveh, which at that time was as a magnifying glass function. The material used is also not a stone but a crystal glass lens. The development of new glasses then shot in the XII century in China and Europe. At that time, the ancient Greeks used a glass bulb filled with water as a magnifying glass.

Islamic civilization has known, and find a 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 combustion. You do this by focusing sunlight on the lens focal / focal lens.

Later in 1268 Roger Bacon, a British scientist, discovered reading glasses. And in the 1300s eyewear began to be produced with a manufacturing center in Venice. But the glasses when it has not been as it is now. Simple lens quality, and its use is also troublesome. 

Various experiments were conducted to find the best and safest way to wear glasses. There were installing metal plates installed length from the nose to the middle of the head and then gets down to the neck. There is a small chain installed on both sides of the glasses and tied at the back of the head, such as goggles, glasses no longer linking to the cap.

There are taped nose so that the wearer should continue to hold. Until finally in 1727, the idea to put the stem so that the glasses can be attributed to the ear. Subsequent developments, in 1784 Benjamin Franklin had found bifokus glasses, which have a convex lens and a concave lens in a single frame. Until 1884 was also produced bifokus lenses are made from pieces, despite adhesive. It was only in 1908 and 1910 known convex and concave lenses that fully integrates in a single lens. 

Glasses of the 18th century 
also helped developed the lens material, the first of the quartz, then made glass lens. In 1970 discovered a plastic lens material as other materials for the manufacture of spectacle lenses. Finally, the more people who use glasses and glasses developed with different types of frame models.

 

 

 

 

Regards, Dwi Hartoyo, SP
 

REFERENCES
1. http://wisbenbae.blogspot.com/2013/02/sejarah-ditemukannya-kacamata.html 
2. http://terselubung.blogspot.com/2013/03/sejarah-kacamata.html