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The origin and development of glasses
issuing time:2020-05-21

Glasses are lens lenses embedded in the frame, which are worn in front of the eyes to improve eyesight, protect the eyes, or be used for decoration. The mirror can correct a variety of vision problems, including myopia, hyperopia, astigmatism, presbyopia or strabismus, and amblyopia.

The origin and development of glasses:

In 1268, Roger Bacon first recorded the lens used for optical purposes. In Europe, the earliest glasses appeared in Italy, introduced by Alessandro di Spina of Florence, and the earliest glasses portrait "Hugh of Provence" was drawn by Tommaso da Modena in 1352.

Is said to have been invented by an optician named Almato and an Italian Spina living in Pisa.

American inventor Benjamin Franklin, suffering from nearsightedness and farsightedness, invented the dual vision glasses in 1784;

In 1825, the British astronomer George Avery invented glasses that can correct astigmatism. Glasses appeared in China in the middle of the Ming Dynasty. In the Ming Dynasty, Western glasses were introduced into China through the Western Regions or Nanyang. Ming Wanli Tian Yiheng said in the second chapter of "Leaving the Blue Sun", "Zao": "Every time I read the article, my eyes were drowsy, and I didn't distinguish between detailed books. It is tied to the back of the head, and no one knows it, so I ask Yu. Yu said: This is also the same. "At this time," Zao "was originally called.