Can Vision Loss be Prevented?

The prevention of myopia is a method of preventing myopia by correcting postures and shortening time. The incidence of myopia among adolescents in China is still increasing. Medical experts believe that the visual environment is the main cause of myopia, rather than eye habits ^[1] .

Prevent myopia

The prevention of myopia is a method of preventing myopia by correcting postures and shortening time. The incidence of myopia among adolescents in China is still increasing. Medical experts believe that the visual environment is the main cause of myopia, rather than eye habits ^[1]

Scientific experiments have proved that: in the dark, the cell membrane has certain permeability to sodium ions, and the electrostatic potential of the cells is relatively in a partially depolarized state. Under light, the permeability of the cell membrane to sodium ions is reduced, and the depolarization is reduced to make the cells tend to hyperpolarize. The distribution of cone cells and rod cells in the fovea of the retina outward to the periphery corresponds to the Tyndall and Raman effects of vitreous organic fluid on photons entering the eye. The foci of the human eye retina receptive fieldthe cone and rod cell organization of the peripheral anti-antibody, is conducive to the retinal receptive field abandoning the green background and extracting the yellow foreground information. Therefore, the background color of textbook pages is designed to be green near the red limit of sodium photoelectric effect of 540nm, and the text color is designed to be yellow near 580nm of the main line of the sodium atomic spectrum. Rod cells appear extremely sensitive in the wavelength range of green light ([English] p. Borrell, "Introduction to Photochemistry" Science Press, 1987, 1st edition). Because green light waves are easily scattered after entering the vitreous body in the eye, while yellow light waves enter the eye and can directly pass through the vitreous body to stimulate cone cells, the human eye is particularly sensitive to light waves on the yellow paper surface and is susceptible to burning. It is reported that the inner core of the new version of the workbook is yellow paper for preventing myopia. If the workbook is too close to the eyes, the eyeballs will feel swollen.

When looking at things at different distances and different brightness, the human eye has a certain ability to adjust automatically, so that the image on the retina can be as clear as possible in various situations. The essence of myopia in adolescents is that the conditioning function of the eye muscles has deteriorated, resulting in distant light passing through the eye's refraction, the focus falls in front of the retina, and a clear image cannot be formed on the retina. It can be seen that to prevent myopia, it is necessary to avoid the excessive tension of the eye muscles, which leads to the decline of its regulating function. So, how to avoid overuse of eyes?

Right ambient light level

In most instances,

1. Social prevention: In today's society, the expectations of children are too high, and the knowledge is updated quickly, so it adds a lot of unreasonable and extra burdens on students, which leads to an increase in myopia. This is a problem to be solved. Social issues. Therefore, social support is needed to make children relatively relaxed during eye development.

2. Prevention in schools: The first is environmental facilities: classrooms should be spacious and bright, and the light intensity of blackboards and student desks should meet national standards ^[6]

1. The visual environment with poor light pollution is not taken seriously:

The medical community states that "the visual environment is the main cause of myopia." Studies have shown that the visual environment contaminated by light can cause damage to the cornea, iris, and retina of the human eye, and further cause visual fatigue and vision loss.

Light pollution mainly comes from excessively strong light sources (such as sunlight and table lamps too close) and their reflections. Many people think that the closer the lamp is, the brighter the light, the better. In fact, otherwise, when reading a book, too strong light (whether it is sunlight or light) has obvious harm to the human eye, and it must be avoided. In particular, excessively strong light, such as reading and writing in the sun, or reading and writing under a desk lamp that is too close, can easily cause eye fatigue and even retinopathy. Children and children aged 6-12 must be reminded to take precautions. In addition, scientifically determined that the light reflection coefficient of white book / book paper is as high as 90%, which seriously harms the visual health of young people.

Most of the existing myopia prevention and control methods focus on alleviating visual fatigue and lack attention to light pollution in the environment. However, in view of the seriousness of light pollution, it is necessary to adopt a scientific method to eliminate it in order to reduce eye damage. If you can't judge whether the brightness of the ambient light in study and life is appropriate, then you can use

1. Decreased vision with naked eyes means deeper degrees

When the child's naked eye vision is checked at the hospital's pre-examination office, the child's parent's most common sentence is "Oh, how long are your degrees?"

Misunderstanding: naked eyesight can not be used as a standard for the degree of nearsightedness, and naked eyesight cannot be used to measure the quality of visual function, but to correct the vision as a basis for measurement.

When checking naked eye vision, the eyeball should be in a natural state so that the detected vision is true. However, many adolescents do not wear glasses for a long time after having refractive problems, and have developed a bad habit of squinting and watching. Eye squinting is an action that artificially strengthens the muscle adjustment in the eye, brings the eyes together, and temporarily improves vision, but the existing refractive problems will accelerate the development of myopia.

2. The better the vision in childhood, the less myopia

Misunderstanding: The younger the age, the better the vision, the older will not be myopia? Under normal circumstances, infants and young children are short-sighted soon after birth, and gradually become square with age. A child's failure to achieve normal vision before school age does not imply abnormality. If the refractive state exceeds the physiological range, the child's vision develops too fast, but it may be easier to accelerate the occurrence and development of myopia. As long as the normal vision and refractive power of children of all ages are identified, under normal circumstances, do not intervene prematurely, every three months, try not to exceed six months, and regularly review the vision and refractive status.

3. Astigmatism does not cure

Most people have more or less astigmatism, so astigmatism within 100 degrees is physiological and usually does not significantly affect vision. However, if the astigmatism power is too high, it will cause the corresponding blurred vision and fatigue symptoms, and it is necessary to wear astigmatism glasses with the appropriate power under the guidance of an optometrist. When wearing a astigmatism lens to look at things, it may be a bit uncomfortable at first, because what you see through the astigmatism lens is a bit deformed, the higher the degree, the more obvious, but you can adapt to wearing glasses. Generally speaking, physiological astigmatism will improve with development, but it may be restored by correcting beyond the physiological range, and it is difficult to completely recover.

4. Ultra-high myopia is pathological myopia

High myopia refers to 600-900 degrees, and ultra-high myopia refers to more than 900 degrees. High myopia can be divided into two categories according to whether there are changes in the eyes. One type is simple high myopia, which has a high degree of myopia and can be stable to a certain period without serious changes in the eyes. The other type is

1.Adjust window color

Desktop-> Right-click-> Properties-> Appearance-> Advanced-> Project selection (window)

Color 1 (L) selection (other): Change the hue to 85, saturation: 123, brightness: 205. -> Add to custom color-> OK at the selected point of custom color-> OK

2. Adjust web page color

Open the browser-> click "Tools"-> click "INTERNET" option-> click "accessibility" in the lower right corner-> check "don't use specified color in web page". Click OK to exit.

After such a few simple steps, all the documents are very soft hummus green, just like the anti-myopia book used in high school. This shade is configured by an ophthalmologist to prevent eye fatigue.

3, put a hacker anti-blue light protective film on the computer screen to prevent retinal cells from being damaged by blue light, causing vision diseases such as myopia.