People with myopia, stay away from sweets! Even if your eyesight is poor, you can't pretend you don't see it!

I remember seeing a hot search, "People with myopia should not eat too many desserts." Some people believe that eating too many sweets may aggravate myopia.

Netizens said, can people with myopia not even eat sweets?

Some people also said that my eyesight is not good, so I will just pretend I didn’t see this…

There are also people who say they often stay up late to browse their phones and play computer games, but their eyesight is still very good. Maybe it's the legendary "non-nearsighted constitution"...

Eat sweets

Will it aggravate myopia?

In fact, sweets themselves do not directly affect vision, and eating sweets occasionally will generally not lead to myopia. The impact of sweets on vision mainly depends on the amount of intake . If a large amount of sugar is consumed every day, it may accelerate the progression of myopia.

Generally speaking , for children and adolescents over 3 years old, it is recommended to control sugar intake to 10-25 grams, which is 5% of the total dietary calories; adult women should try not to exceed 100 calories (about 25 grams) per day; for adult men, daily sugar intake should not exceed 150 calories (about 36 grams).

Why

Can excessive intake of sweets affect eyesight?

The effect of eating sweets on vision is related to the "sclera" of the eye.

Excessive sugar intake will affect the body's absorption of calcium ions in food . In childhood, the development of the fibrous membrane of the eye requires long-term intake of a relative amount of calcium. Excessive sugar intake leads to calcium deficiency in the body, which can easily weaken the elasticity of the eye wall and the strength of the scleral wall will gradually decrease.

At this time, under the long-term mechanical traction of the extraocular muscles, the weak wall of the eyeball will easily change from a nearly circular shape to an elliptical shape, and the eye axis will also increase accordingly. Over time, it will cause myopia or worsen myopia.

Secondly, the sclera is the outermost layer of the eyeball wall, which requires a lot of vitamins in the metabolic process, especially B vitamins . Vitamin B1 has a protective effect on the optic nerve, and its content will affect the state of the optic nerve.

However, when the sugar in sweets is metabolized in the human body, it needs a lot of vitamin B1 to help. Eating a lot of sweets regularly will cause vitamin B1 deficiency. The consequences of this will not only make the eyes tired easily, but also cause the optic nerve to "malfunction" due to "nutrition shortage". At the same time, it will affect the oxidation of sugars in the body. Incomplete oxidation will be retained in the blood and induce or aggravate visual neuritis.

In addition, excessive sugar intake can cause hardening of the lens and increase the risk of cataracts.

Therefore, regardless of age, we should reduce the intake of added sugar, especially for children and adolescents who are still growing. The sugars in the diet, such as fructose, lactose, and starch, can be consumed normally, but there is no need to consume sweets frequently and excessively.

A study by Tufts University in the United States pointed out that eating less sugar can alleviate myopia. The researchers found that a high-sugar diet can cause vision degeneration, including atrophy of retinal pigment epithelial cells and damage to photoreceptors, while a low-sugar diet will not cause the above symptoms. After switching from a high-sugar diet to a low-sugar diet, the symptoms of retinal damage were alleviated.

Is there really such a thing as a “non-myopia physique”?

Everyone has different genetic mechanisms, and a small number of people are indeed less likely to be myopic, or their myopia increases more slowly than others. (However, although "non-myopia physique" is enviable, it may be more likely to develop symptoms of astigmatism when you get older.)

Most children are farsighted when they are born . This is physiological farsightedness and also a kind of "farsightedness reserve" that will be gradually consumed with age. Different consumption rates determine whether they will be nearsighted or not.

Due to genetic factors, some people are born with higher degrees of hyperopia. During their growth and development, they spend more time outdoors and use their eyes less at close range . Their "hyperopia reserve" is sufficient, and the possibility of myopia is reduced.

Some children and adolescents use electronic devices too much and lack sleep and outdoor exercise , which will lead to premature consumption of their "hyperopia reserves" and eventually cause problems such as myopia.

Therefore, we must not relax our vigilance when it comes to protecting our eyes . We must use our eyes scientifically, increase outdoor activities, and replenish our eyes with nutrition in a timely manner.

The cone cells in the human fundus need to consume a substance called "rhodopsin" on a daily basis. The raw materials of this substance are vitamin A, B vitamins, retinol, yolk , etc.