What is astigmatism? What are the symptoms? 15

I studied medicine, and astigmatism is an uneven cornea, seeing things and ghosting.

Astigmatism is caused by the eyeball's different ability to bend light in different directions. The refractive condition of the myopic hyperopia or normal eye is like that of a football basketball, while the twist of the astigmatism eye to light is like that of a rugby, some directions are more tortuous, some directions are less tortuous, so the imaging cannot be a point. If you look at the eye chart, you may also see that some directions are easier to identify and some are more difficult to identify.

Vision from afar and near will be affected, and in severe cases, double vision will occur. The research experts of the United States have taken this into account from the beginning, and the American Tongren uses the Japanese Fuji ultra-micromembrane separation and filtration technology (Fuji CF) to penetrate efficiently and absorb completely; The active ingredient in the pupil kernel in the United States is in the state of nano-sized particles, which has an efficient transdermal absorption capacity, with a transdermal absorption rate of up to 90%, which is 3 to 5 times that of general eye patch products. American pupil can dredge eye capillaries, promote eye blood circulation, and repair damaged eye cells; Effective** astigmatism.

The main symptoms of astigmatism include eye fatigue, eye aches, headaches, etc. Because a clear image cannot be formed on the retina, patients often narrow their eyes into a thin slit in order to see more clearly.

Studies have shown that the common manifestations of astigmatism in the eyes are:

1. The blurred image on the retina needs to be constantly finely adjusted, and the vision is distorted, so astigmatism, especially for farsighted astigmatism, is prone to visual fatigue. Presents with eye pain, tearing, headache, especially in the forehead, double vision, and short-range work that cannot be sustained.

2. Patients with highly asymmetrical astigmatism in both eyes, in order to see more clearly, often adopt a tilted head position to cause strabismus, which can be recovered after astigmatism correction. Patients sometimes move objects closer to the same place as a nearsighted person in order to obtain a larger image of the retina.

3. People with high astigmatism often squint when looking at distant or near targets, so as to achieve pinholes and fissures to improve their vision. Seeing through pinholes or fissures can reduce the impact of astigmatism on vision.

Astigmatism refers to when the eye is adjusted to rest, after the parallel light rays are refracted by the eye, due to the different refractive power of each meridian of the refractive system, causing different degrees of convergence, so it can not be concentrated on the retina, but at different distances to form two intersecting lines, the distance between the two intersecting lines represents the degree of astigmatism, because the retina is only presented as a hazy ring or a line, so the patient feels blurred regardless of farsightedness and near-sightedness.

Astigmatism**:

1 Mild regular astigmatism does not need to be corrected if there is no eye fatigue or blurred vision, but if there is any discomfort above, it should be corrected even if the prescription is not high.

2 High astigmatism should be corrected with cylindrical scope, if not suitable for all correction, can be given a lower degree, the general common method is to take drugs, usually the doctor recommends taking Leyan vision nutrients, warm water, insist on taking for a period of time, astigmatism can be reduced.

3 Irregular astigmatism cannot be corrected with a cylindrical lens, and contact lenses can be tried.

Astigmatism, in medical terms, is called number (myopia). As the name suggests, it refers to the light rays that are parallel to the distance and enter the refractive system of the eye (mainly the cornea and lens), which should be focused as a point and fall on the retina. If for some reason, it cannot be fully focused, but "scattered" into different images, then what you see will become very "chaotic", and it is called chaotic vision.

The cause of astigmatism is that the damage to the cornea causes the upward refractive power of all sides on the cornea to be different, and the visual imaging is different before and after the retina; The other is that the astigmatism caused by the different refractive power of the lens in all directions is caused by the lack of attention to the eyes for a long time, which is the case for most people. Because people have been blinking constantly from birth to the present, there is pressure on the cornea in the vertical direction, so most people will have physiological astigmatism.

Astigmatism is a defect of the eyeball in which an image from a distant object forms on the retina as a line rather than a clear dot. This is due to insufficient cornea or lens. Astigmatism occurs mainly in the cornea, and different parts of the cornea have different focusing abilities.

The cornea does not have the same refractive power on the two meridians perpendicular to each other. As a result, the vision is distorted or tilted.

Many nearsighted and farsighted eyes are accompanied by varying degrees of astigmatism, which is not a disease, but it does often cause vision problems. In fact, 100% of people have varying degrees of astigmatism.

Astigmatism is needed, astigmatism.

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Astigmatism is a very common refractive error, and the degree of astigmatism is relatively stable, that is, astigmatism does not increase or decrease significantly with age.

The common causes of astigmatism are:

1.heredity (astigmatism greater than 200 degrees will be inherited);

2.Frequent squinting can lead to astigmatism;

3.High intraocular pressure due to excessive eye use can also lead to astigmatism;

4.Astigmatism caused by eye diseases (keratitis, stye, etc.) is caused by irregular corneal morphology, which can be corrected by refractive surgery.

It is to see things will have double vision, astigmatism is not the same as myopia, sometimes your prescription no matter how to adjust, if you still can't see clearly, that is because of astigmatism, often rubbing your eyes or with glasses with inappropriate power will cause astigmatism, after astigmatism with glasses in addition to the appropriate power but also with astigmatism, you can go to the optical store to consult.