Ancient people lit candles and stayed up reading every day. Why didn't anyone have myopia?

Now it is more and more important for us to learn cultural knowledge, which leads to more and more literati students suffering from myopia. In cities or rural areas, we can also see many nearsighted people. So in ancient China, it was difficult for us to find short-sighted scholars, let alone ordinary people. Why can't ancient scholars who love learning be nearsighted?

/96 DDA 144 ad 3459828895 f 95 a 07 f 43 1 ad caef 84 de？ X-BCE-process = image/resize, m _ lfit, w _ 450, h _ 600, limit _ 1/quality, q _ 85 The probability of the ancients suffering from myopia is almost zero. Why? Because unlike us modern people, they don't have computers and don't have to play with them all the time. In ancient times, students seldom read books, and it took several years to read a book.

In ancient times, most people were illiterate, and few people could afford books. After all, the feudal society at that time was not as developed as our present society, and it had the least scholarly family. Only people or officials with good family conditions can afford to read books. Students who love reading are not excluded. At that time, in order to get ahead or win glory for their families, they studied hard at the cold window for decades, reading books by candles almost every night. But this kind of person was still rare at that time, so the probability of suffering from myopia was very low.

/2 fdda 3 cc 7 CD 98d 1047 CB 10 f 92 a 3 FB 80 e 7 AEC 90 de？ X-BCE-process = image/resize, m _ lfit, w _ 450, h _ 600, limit _ 1/quality, q _ 85 In ancient times, people who love learning usually read books from morning till night. They all light candles and read books at night. The light of the candle is very soft and the brightness is not strong. If they continue to read with candles for a long time, their eyes will definitely be uncomfortable. There are also ancient books that people copied by hand overnight. At this rate, will their eyes really be all right?

/00e 9390 12 13fb 80 e 3 1767d 1f3dd 12f 2 EB 8389456？ X-BCE-process = image/resize, m _ lfit, w _ 450, h _ 600, limit _ 1/quality, q _ 85 Generally speaking, the ancients still had some methods to prevent myopia. Ancient people wrote with a long brush, their eyes were far away from the font, and the font they wrote was relatively capitalized. Objectively speaking, they wrote. In ancient times, there was no electricity. Except for a few people who work hard, most people go to bed early. The probability of suffering from myopia is also low.

/622762 d0f 7039 18 F5 a6f 2 1025 a3d 269758 EEC 4b 8？ X-BCE-process = image/resize, m _ lfit, w _ 450, h _ 600, limit _ 1/quality, q _ 85 Those who were diligent and eager to learn in ancient times would get up and look into the distance when they were tired of reading during the day. The ancient environment was very natural, with green grass and red flowers everywhere. Looking around, all I see are villages and rivers, and I won't feel too tired when I look at the beautiful scenery.

On the contrary, it can reduce the discomfort of the eyes. At night, they light candles and read books. When their eyes are tired, they will shake their heads. This action can soothe the nerves in the brain and relax our eyes. Therefore, the ancients would not do great harm to their eyes because they lit candles and stayed up late reading books every day. Another important reason is that they have been used to using candles every night since birth, and they have also adapted to the brightness of candlelight. Naturally, you won't be nearsighted.