Ancient glasses cost a lot_ a pair of glasses for a horse

Ancient glasses cost a lot: a pair of glasses for a horse

As cultural knowledge became more and more important, there were more and more literati students with myopia. However, in ancient times, it was rare to find literati students with myopia, let alone ordinary people. Why did the ancient literati rarely have myopia? Some people have summed up the following six reasons: 1. In ancient times, most people could not read and write, and not many people could afford to read. Only people with good family conditions or status can afford to read, and even if they read, they spend very little time on reading, and the kind of people who read with their heads hanging over the beam and thorns are even rarer. This determines that there is no general environment for the formation of myopia in ancient times, and the risk and probability of myopia are very low. Second, the writing brush used by the ancients was relatively long, the distance between the eyes and the words was farther, and the words written were relatively larger, which objectively played a certain preventive role. 3. The ancients read private schools, and without the current blackboard, it will not be difficult to read the blackboard, and there is no need to think of any way to cure myopia. In addition, the ancient natural sciences were not developed, and the students at that time read very few books, and there were no foreign languages, physics, chemistry, etc., and mathematics was only simple operations such as addition, subtraction, multiplication and division, mainly the Four Books and Five Classics, and a "Analects" had to be read for several years, and it was natural that they would not be short-sighted if they did not read too many books. Fourth, the pace of life of the ancients was slow, and the traffic was mainly horseback riding and walking, so there was no need to worry about traffic safety, so the harm of myopia was small. Fifth, the ancients did not have glasses, although it seems unfavorable, but objectively can prevent the deepening of myopia, so the harm of myopia is very small. Sixth, the ancients walked and rode horses without glasses, which had the effect of preventing myopia in the eyes, so the myopia of the ancients was very small, and the harm was very small, compared with other diseases, it was nothing. In 1260 A.D., Marco Polo described the scene of an old Chinese man wearing glasses and reading small print. It is said that ancient Chinese glasses were large oval in shape, set in a frame made of turtle shell, with copper feet attached to the sideburns, or tied to the ears with a thin string, or directly attached to the hat. And at that time, glasses were expensive, and there was a record of a squire exchanging a horse for a pair of glasses. Glasses can be traced back to 1260 A.D. or even earlier. The transformation of eyewear can also be described as changing with each passing day, the bulky and rigid frame shape has faded, and the material of the lens has changed from expensive crystal and quartz to light plastic lenses. But no matter how glasses change, people still love them, beautiful shapes, light glasses, and the change of the times has given rise to a variety of glasses with fashion trends. This article is from Huanen Industry, if you need to delete it, please contact kaity@yichao.cn Related reading: Boots glasses frameless glasses。