It's said that the world of myopia is like this: six parents don't recognize each other 20 meters away, men and women don't recognize each other 50 meters away, people and animals don't distinguish 100 meters away; our world is pure, we are not indifferent, just a little fuzzy.
So the existence of glasses is really the most useful invention. Without glasses, myopia can't imagine the world at all, or only rely on imagination
So ancient people did not have glasses, if they were short-sighted, how should they live? There is a saying that the Chinese invented glasses 2000 years ago, but this is not accurate. It should be that our country has discovered the lens made of crystal and gem very early. Crystal has the function of amplification.
But glasses are made of glass. Glass is originally foreign. Therefore, glasses should be used by foreigners as a tool to correct vision.
The inventor of glasses, sovino de GRI Amadi, was an inventor in Florence. It was probably in the early 13th century. At that time, the technology of glass was very mature, so the conditions for the invention of glasses were basically met. The scientist discovered the secret of convex lens and concave lens. After discovering the secret, he began to study how to turn the glass into a curved shape and how to adjust the angle. Finally, the glasses were made.
However, as glasses did not become popular at that time, it is estimated that there were too few myopic people at that time, or the technology of making glasses was not good enough, there were too many impurities, and the curve of glasses was not very good. Although not widely circulated, there are glasses at last.
About five hundred years later, in the middle and late 13th century, the glasses came to Franklin. As we all know, this scientist invented lightning rod, odometer, forest stove, glass organ and so on. Franklin read a lot and knew a lot. In his 60s, his eyesight dropped a lot. He was probably presbyopia. He could see far away and near.
But he always has to work and write things, so he invented a pair of glasses, called bifocal glasses, which the elderly all know. It solves the problem of seeing far and near at the same time on a pair of glasses by adding a positive lens degree to the lower part of the glasses. It is a kind of presbyopia glasses.
There is also a saying that glasses were invented by British philosopher bacon. Once he took a walk, he found a lot of water droplets on the spider web. He found that when he looked at the leaves through the water drops, the meridians on the veins of the leaves were enlarged a lot, and even the fine hairs on the leaves could be seen.
After discovering this phenomenon, bacon was very excited. He found a glass ball and looked at the text through the glass ball. It was a bit unclear. Later, he cut a piece of glass and enlarged the text. The experiment was successful. Finally, he made glasses. This story has also been written into the textbook, and the story of Bacon's invention of glasses has been sung everywhere. Presumably, this invention story can also inspire many children's interest in science.
Although there is a long history, many things can not be verified clearly. Moreover, the process of invention is to step by step and inspire each other. But it can be confirmed that the first myopia glasses appeared in Europe in the 13th century.
Another way of saying is that in 1352, in an Italian painting, there was a figure painting. The person in the painting was an old missionary. He was reading a book and reading a manuscript with a pair of glasses on his nose. Moreover, it was a famous painting. Judging from this painting, it is said that the glasses were invented by armadi of Italy and the missionaries in the painting, which is also believed by many people, but it was already the 14th century at that time!
In a word, no matter which invention, it has great significance. Today, with the development of glasses, in addition to frame glasses, all kinds of beautiful pupils are also the favorite of many young people, but Xiaobian still wants to say that if the degree of myopia is not very large, unless you go to the railway station, airport and other places, you should not wear glasses every day, especially beautiful pupils, which will really aggravate the degree, and you can't do without glasses in the future!
prescription sunglasses ray ban，
ray bans prescription sunglasses，
prescription sunglasses for cheap，
prescription sunglasses on line，
Muukal |Affordable Eyeglasses online，
www.muukal.com