The Interesting History Of Glasses: How Bacon Invented Them
In the mid of the thirteenth century, the great English scholar Kevin Bacon found that a lot of people suffered a lot from not being able to see clearly the words and characters on books because of the poor eyesight. And it occurred to him one day to invent a tool to help people improve their eyesight. However despite the great effort he made doing experiments, the idea never panned out.
One day after rain, Bacon was taking a stroll in the garden when he saw some raindrops sticking to a spider web. Looking through the raindrops, he found to his excitement that the veins had been enlarged. Immediately he ran back home and searched throughout the house for a glass bead. But behind the glass bead the words on the paper were still vague. So he cut a piece down from the glass bead using a diamond and a hammer. Putting the piece of glass near the paper, the words were really enlarged! It was successful and Bacon almost thrilled. Later he found a chip of wood, pierced a round hole in it, put the glass bead in and equipped it with a handle. With this it was more convenient for people to read and write. It is what we call today eyeglasses.
The lenses of the glasses were improved again and again and eventually developed into the kind people wear today. And there are a several kinds: glasses for nearsightedness, presbyopia lenses and so on. It can be said a great contribution that Bacon made for the human society.
However it is generally believed that glasses first appeared in Firenze, Italy and they were first made an Italian in the city of Pizza. In 1825, an English astronomer invented the glasses that could correct astigmatism. There is not much record about the origin of glasses in China but someone say that they showed up in the mid of Ming Dynasty because it has been observed in a picture preserved since that time an old man with spectacles. And in the Qing Dynasty glasses were already well spread.
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