What causes astigmatism in the eye? Will it get worse and worse, and how can it be corrected?

Ophthalmologist Shi Yongli Profile: Director of the Department of Ophthalmology, working in a tertiary hospital for more than 10 years, good at cataract, glaucoma, pterygium surgery and various ocular surface diseases, dry eye syndrome, keratitis and pigmentitis, fundus disease, various complex eye diseases, systemic diseases, ocular complications and difficult diseases.

Hello, astigmatism is a refractive abnormality of the eye that is related to the curvature of the cornea. Astigmatism above 70 is congenital and generally difficult to reduce, but if you don't squint at objects or pay attention to eye hygiene, you can alleviate the rate of astigmatism deepening.

The correction of astigmatism is basically the same as that of spherical refractive error, except that the axial direction and diopter of astigmatism need to be corrected at the same time.

Causes of astigmatism:

Regular astigmatism is mostly due to congenital anomalies in the cornea, and lens astigmatism may also be present.

Irregular astigmatism is mainly caused by uneven corneal refractive surface, such as corneal ulcers, scars, keratoconus, pterygium, etc.

Astigmatism simply means that the eye is not well developed, and there is a phenomenon of unevenness. And now there are more and more children with astigmatism, and children's astigmatism is directly related to the serious lack of vision nutrients, as well as bad eye habits.

Children with astigmatism first need to supplement vision nutrients in time, it is recommended to take Joy Vision Nutrients, twice a day, one pack each time, take it with warm water, insist on taking it for a period of time, and the astigmatism will gradually decrease.

Generally, more than 200 degrees is a high degree of astigmatism, the vision has been seriously affected, glasses are a must, and the most important thing is to develop good eye habits.

1. Regular eye examination 1 2 times a year. Instruct young children to practice good hygiene and not to contact their eyes with their hands or chemicals. When reading, there should be plenty of light, preferably from the left rear; Correct posture and a distance between 30 cm and 40 cm.

2. When choosing reading materials, the font should be clear and not too small.

3. Watching TV must be 5 7 times the diagonal of the TV picture. Read a book for no more than one hour in a row. If you need glasses, you should be examined by a doctor and then dispensed with glasses.

Astigmatism is also known as staggering. The surface of a normal person's eyeball is a round sphere, but under the pressure caused by the upper and lower eyelids, the eyeball will appear oval like a rugby basketball, so that the horizontal driving radius will be greater than the vertical driving radius, and the driving radius is inconsistent and causes the light to enter the eye, which cannot be focused into a point, and forms a scattered point, and the visual field will appear blurred overlapping images or even deformed and distorted, which is the cause of astigmatism. [10s to test which correction plan is suitable for me].

The symptoms of astigmatism in the eyes are as follows:

2.Visual fatigue: Astigmatism, especially in patients with farsighted astigmatism, is prone to visual fatigue due to the need for constant fine adjustment of blurry images on the retina and distortion of vision. Younger people with recurrent hyperopic astigmatism can often compensate for it with accommodation.

3.Normal head position and eye position: In order to see more clearly, people with high asymmetrical astigmatism in both eyes often adopt a tilted head position, resulting in strabismus, which can be restored after astigmatism correction.

4.People with high astigmatism often squint when looking at distant targets, achieving pinholes and fissures to improve vision.

If you want to know more about astigmatism, we recommend consulting Beijing Mingshi Ophthalmology. Beijing Mingshi Optoscopy has brought together a core expert team composed of more than 10 experts, including Professor Zhou Yuehua, a well-known domestic myopia medical expert, Professor Li Ying, chief myopia expert of Peking Union Medical College, and Professor Zhu Siquan, a myopia lens implant expert from the former Tongren Hospital.

Astigmatism is more painful than myopia and can be solved with refractive correction, the effect is obvious, and it is safe and fast.

Astigmatism Normal eyes want to image the external object to the retina The imaging device is mainly a lens (like a glass ball), which is spherical The lens of the astigmatism eye changes to the cylinder, and the imaging is distorted Therefore, you must wear glasses to correct it, and the angle with the eye can not be bad, otherwise even if the power is appropriate, you will not see clearly.

Ocular astigmatism can be divided into myopic astigmatism, hyperopic astigmatism, and mixed astigmatism, which can be corrected by a rod lens. The mechanism of action of the cylindrical mirror is that when the light passes through the cylindrical mirror, one direction remains unchanged, and the other direction can be combined with a concave lens or a convex lens to change the direction of the light so that the eye focuses to one point to see the external object clearly. Surgery such as lasers and intraocular placement of astigmatism intraocular lenses can also correct astigmatism.

Astigmatism, mainly based on the quality of vision, and the severity of visual fatigue, if it is regular astigmatism, does not cause visual impairment, no visual fatigue can be treated. If you have eye fatigue and blurred vision, no matter how small or large the astigmatism is, even if the astigmatism is very slight, you need dilated refraction and wear appropriate corrective glasses.

Astigmatism is physiological and irreversible, if it gets more and more serious, it is still necessary to correct it in time, go to a regular eye center, and wear glasses to correct it or do refractive surgery to correct it according to your visual astigmatism.

Eye astigmatism should still be taken seriously.

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.

The so-called astigmatism refers to regular astigmatism, most of this kind of astigmatism is congenital, mainly caused by abnormal corneal curvature, in normal infants, the prevalence rate of this astigmatism is quite high, which may be related to the compression of the upper eyelids, sometimes called physiological astigmatism, the degree is very slight (25-50 degrees), this astigmatism may decrease slightly with age, and the change is not large.

Astigmatism caused by the lens is rare, some are acquired astigmatism, such as long needle eye or miliary eyelid eyelid, long-term poor eye posture (such as squinting, rubbing the eyes, lying down to read, etc.), eyelids compressing the cornea, will also change the curvature of the cornea, increase the degree of astigmatism, in addition, eye surgery (such as cataract and corneal surgery), may also change the degree and axis of astigmatism.

Irregular astigmatism refers to the irregularity of the reflexion force of each meridian of the eyeball in the same meridian, mainly caused by corneal diseases The unevenness of the corneal surface, including keratitis, corneal ulcer, corneal scarring, keratoconus, etc., some cataracts are in the early stage, and the irregular reflexion force inside the lens can also be caused. Irregular astigmatism does not find two main meridians like regular astigmatism and cannot be corrected with cylindrical lenses.

PS: It's best to go to the hospital for a check-up.

Ophthalmologist Shi Yongli Profile: Director of the Department of Ophthalmology, working in a tertiary hospital for more than 10 years, good at cataract, glaucoma, pterygium surgery and various ocular surface diseases, dry eye syndrome, keratitis and pigmentitis, fundus disease, various complex eye diseases, systemic diseases, ocular complications and difficult diseases.

The occurrence of astigmatism is mainly caused by congenital development and acquired diseases. Congenital astigmatism is mainly caused by corneal development, due to the inconsistent curvature of the cornea, parallel light rays can not form a focal point after refraction through the cornea, resulting in blurred vision.

Acquired astigmatism can be seen in ocular space-occupying lesions, which compress the cornea and cause changes in the curvature of the cornea. If a lens dislocation occurs, it can also cause astigmatism. Keratoconus, corneal dilation, and changes in corneal curvature can also lead to changes in astigmatism.

In addition, eye trauma and eye surgery can also cause acquired astigmatism, which can be divided into regular astigmatism and irregular astigmatism.

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.