Why was it not easy for the ancients to be myopic when reading?

Abstract: in the Ming Dynasty, someone wrote a limerick satirizing myopia, The poem says: “Xiao Jun’s eyes are so strange that I stand beside him and ask who is. The sun goes through the window lattice, takes marbles, and the moon moves to pick up firewood. Now, with the increasing importance of cultural knowledge, there are more and more literati students with myopia. However, literati students with myopia were rarely found in ancient China. Why did ancient literati have little myopia? Some people have summarized several reasons for this phenomenon 1. In ancient times, most people did not know how to read, and not many people could afford to read. After all, there were few scholarly families. Only people with good family conditions or status could afford to read. Even when reading, there was little time spent on reading, and there were few readers with hanging beams and pricking stocks, which determined that there was no environment for myopia in ancient times, The risk and probability of myopia are very low., 2. The ancients used a long brush to write, their eyes were far away from the words, and their words were relatively large, which objectively played a preventive role., III. The ancients read in private schools. Without the current blackboard, they would not have difficulty reading the blackboard, so they didn’t have to think of any way to cure myopia. In addition, the ancient natural science was underdeveloped. At that time, students read very few books, and mathematics was only simple operations such as addition, subtraction, multiplication and division. It was mainly four books and five classics. A Book of the Analects had to be read for several years. Without books, they would not be nearsighted., Of course, the ancients still had a certain number of myopia. In the Ming Dynasty, someone wrote a limerick poem mocking myopia. The poem said: “Xiao Jun’s eyes are too strange. He stood next to him and asked who is. The sun penetrates the window lattice, takes marbles, and the moon moves the shadow of flowers to pick up firewood branches. He scratched his nose by looking at the painting wall and clamped his eyebrows for locking the bookcase. In addition, he blows the lamp to burn his mouth and lip.” A doggerel of 64 words vividly portrays the image of myopia who has lived a lifetime in the clouds. The famous myopic in history is Zhang bangchang, a traitor in Shuoyue Quanzhuan., Glasses were invented relatively late. Lenses are made of crystal stone, quartz, topaz or Amethyst. Materials are scarce and expensive. Ordinary people can’t afford to wear them. Therefore, they are regarded as a symbol of identity and status. In 1260 ad, Marco Polo once described the scene of Chinese old people reading small characters with glasses. It is said that ancient Chinese glasses were large oval shaped and embedded in a mirror frame made of turtle shell. They were stuck on the temples with copper glasses feet, or tied to the ears with thin rope, or directly fixed to the hat.,

now with the increasing importance of cultural knowledge, there are more and more literati students with myopia. However, in ancient China, scholars with myopia were rarely found. Why did ancient scholars have little myopia? Some people have summed up several reasons for this phenomenon:

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. First, in ancient times, most people did not know how to read, and not many people could afford to read books. After all, there were few scholarly families. Only people with good family conditions or status could afford to read books. Even if they read books, they spent little time reading books, and those who hung their heads and stabbed their heads were even rare, This determines that there is no environment for myopia in ancient times, and the risk and probability of myopia are very low.

II. The ancients used a long brush to write, their eyes were far away from the words, and their words were relatively large, which objectively played a certain preventive role.

III. The ancients read private schools. Without the current blackboard, they would not have difficulty in reading the blackboard, so they didn’t have to think of any way to cure myopia. In addition, the ancient natural science was underdeveloped. At that time, students read very few books, and mathematics was only simple operations such as addition, subtraction, multiplication and division. It was mainly four books and five classics. A Book of the Analects had to be read for several years. Without a book, they would not be nearsighted.

of course, the ancients still had a certain number of myopia. In the Ming Dynasty, someone wrote a limerick poem mocking myopia. The poem said: “Xiao Jun’s eyes are too strange. He stood next to him and asked who is. The sun penetrates the window lattice, takes marbles, and the moon moves the shadow of flowers to pick up firewood branches. He scratched his nose by looking at the painting wall and clamped his eyebrows for locking the bookcase. In addition, he blows the lamp to burn his mouth and lip.” A doggerel of 64 words vividly portrays the image of myopia who has lived a lifetime in the clouds. The famous myopic in history is Zhang bangchang, a traitor in Shuoyue Quanzhuan.

and

glasses were invented later. The lenses are made of crystal stone, quartz, topaz or Amethyst. The materials are scarce and expensive. Ordinary people can’t afford to wear them. Therefore, they are regarded as a symbol of status. In 1260 ad, Marco Polo once described the scene of Chinese old people reading small characters with glasses. It is said that ancient Chinese glasses were large oval shaped and embedded in a mirror frame made of tortoise shells. The copper glasses feet were stuck on the temples, or tied to the ears with a thin rope, or the glasses were directly fixed to the hat.