Why do eyes become nearsighted? Thank you, why are the eyes short sighted

The formation of myopia is a very complex process, and there are two factors that can be briefly introduced:

1.Genetic factors: most myopic eyes have a genetic predisposition, and most of the eyes with high myopia belong to the autosomal recessive heritage; There are racial differences, with the highest incidence in yellow people and the lower incidence in black people;

2.Environmental factors: such as long-term close eye use, too strong or too weak light, incorrect eye posture, etc., increase the adjustment load of the eyes, and it is easy to form myopia.

In fact, there are many reasons for myopia in the eyes, including environmental factors, human factors, living habits, etc., and even labor during childbirth will affect and harm the eyesight, so why are the eyes myopia?

Heredity. High myopia is an autosomal recessive disorder. If both parents are highly myopic, the child is highly myopic. The odds are high.

Eye diseases. Symptoms such as cataracts, ciliary muscle spasms, etc., will increase the convexity of the lens, causing myopia. Eye diseases are very harmful and can even lead to blindness.

Physique. Improper work and rest for a long time, malnutrition, irregular life and rest, and anemia caused by poor physical foundation may cause myopia.

Environment. Long-term eye use, poor lighting environment, and improper sitting posture in class can all cause myopia. Even if the ocular adjustment ability is particularly strong, but after a long time of close study, work, and excessive fatigue of the ciliary muscle, accommodative myopia will appear, which is not taken seriously, and if it continues to develop, it may evolve into true myopia.

Improper diet. Chromium in food has a lot to do with myopia, especially in adolescents, where the need for chromium is greater than that of adults. The intake of large amounts of sugar and protein in the body can lead to a decrease in internal chromium stores and a loss of calcium, as well as changes in the osmotic pressure of the lens of the eye, leading to myopia.

Generally speaking, as the child grows older, the original farsightedness gradually develops, and then develops into normal vision, and then further develops like myopia. This is the natural rule of cherry blossom rhythm orange head. Some children overuse their eyes in the process of development, and they become myopic prematurely.

Eye myopia is actually a reason with stomach disease, long-term unreasonable diet will cause stomach disease, the same reason for a long period of unreasonable use of eyes, will cause the eyes to be in an unhealthy state for a long time, and after a long time, they will get sick, that is, myopia. Take a spring as an analogy, if you press the spring, it can, if you press it excessively, or press it for a long time, it will not be able to return to its original state. The eye sees by adjusting the lens.

If you use your eyes for a long time, the lens is deformed and cannot be recovered, and you become nearsighted or farsighted. This nearsightedness and farsightedness are generally permanent. It is best not to use your eyes for a long time and in bad light, and do not play with your phone for a long time, because the light from the mobile phone screen is more harmful to your eyes than you look at the computer at the same time.

If you don't believe it, you can look at the computer for an hour, and then look at the mobile phone for an hour to compare.