What are the symptoms of astigmatism? What are the symptoms of astigmatism

The simplest and easiest explanation is: when astigmatism, seeing things will be ghosted, that is, it is easy to double vision, and it will be deformed, especially in places with insufficient light to see things will be very difficult, usually when astigmatism is exceeded, the blurred vision is more obvious, and it can not be corrected to see clearly with myopia lenses, must use cylindrical lenses, that is, astigmatism lenses. Of course, many people mistakenly think that astigmatism is scattered when looking at the light, which is wrong, and it must be refractioned and examined with a astigmatism table to identify astigmatism symptoms.

Astigmatism is the fact that parallel rays of light cannot form a focal point after being refracted through the eye, which is called astigmatism. Astigmatism can be divided into two categories: irregular astigmatism and regular astigmatism. Symptoms: I don't see far or near very clearly, and I work for a long time in close proximity, i.e., I have swollen eyes, headache, reading or double vision.

On fundus examination, the optic head is oval, the edges are not well defined, and the upper and lower edges and the blurred state of both sides are inconsistent. Astigmatism can be divided into two categories: irregular astigmatism and regular astigmatism. Irregular astigmatism is a phenomenon caused by refractive indiscriminate emission caused by uneven corneal surface.

The correct medical term for astigmatism should be called "blurred vision", because the image cannot be fully and correctly focused, and the image lines seen are distorted, so that the image is scattered, so everyone is used to call it astigmatism. It's mainly the cornea and the lens that are at work! 1.

Corneal deformation The "spherical surface part of the cornea** is crooked or protruding", when the light projected by the image enters the cornea, due to the crooked or protruding part of the spherical surface, the projected light forms multiple focal points on the retina (the normal focus should be only 1), and the original projected light is only straight and horizontal, and becomes a "messy" combination of straight lines, horizontal lines, ellipses, circles, etc. (this is why it is called chaotic vision!). )；As a result, the resulting image is "many and overlapping", resulting in multiple images that are scattered and blurred. 2.

If the lens deviates from its normal position or the lens protrudes into a conical shape, the projected light will also form multiple focal points on the retina, and the image will appear to be scattered. What causes astigmatism (blurred vision)? A normal cornea should be smooth in all directions with the same curvature, like the round sphere of a basketball.

However, in people with astigmatism, the cornea will be curved, and it can be said that the shape of the cornea is more like the edge of a football ball than the round sphere of a basketball. This causes the light to enter a round sphere that looks more like the edge of a football ball than a basketball. As a result, when light enters the cornea, it is distorted and distorted, and the image is blurred.

In general, intensity blur is thought to be congenital or hereditary. However, weak and disorderly vision tends to be acquired, especially in the case of eye surgery, trauma, corneal injury, inflammation and deformation, intraocular pressure, eye muscle compression, and other "eye injuries". Is it possible that if you have nearsightedness or farsightedness, you will not get astigmatism?

Wrong! It is common for people who are nearsighted or farsighted to have astigmatism. In hyperopic astigmatism, one part of the image will be in front of the retina, and the other part of the image will be behind the retina, one in front of the other, and the other will be in different focuses.

In myopic astigmatism, the image falls in front of the retina, but there are many focal points of the image, and what is close is visible, but the edge of the image is also unclear.

1.Decreased vision.

Vision loss is closely related to the degree and type of astigmatism. People with mild astigmatism usually have normal vision, while moderate and high astigmatism have poor distance and near vision. Mild vision loss with simple astigmatism, obvious visual acuity with repetitive astigmatism and mixed astigmatism, and amblyopia can be formed if poorly corrected.

2.Eye strain.

Blurry images on the retina require constant fine adjustments, and distorted vision, so astigmatism, especially those with farsighted astigmatism, are prone to visual fatigue. Presents with eye pain, tearing, headache, especially in the forehead, double vision, and short-range work that cannot be sustained.

3.Compensates for cephalic position and squinting.

In patients with high asymmetrical astigmatism in both eyes, in order to see more clearly, they often tilt their heads and cause strabismus, which can be restored 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. People with high astigmatism often squint when looking at distant and near targets, achieving pinholes and fissures to improve vision.

Seeing through pinholes or fissures can reduce the impact of astigmatism on vision.

Symptoms of astigmatism are:

1. Eyes are easily tired and dry.

2. The things seen are distorted, the images are overlapped, and the distant and near scenes are equally blurred.

3. Severe may lead to persistent headache, nausea and long-term head tilting and other bad posture.

Mild astigmatism (within 50 degrees) does not need to be corrected in most people. However, those who work in precision or need to read small text for a long time should consider wearing astigmatism glasses and taking medication.

Moderate to high astigmatism and farsighted astigmatism or myopic astigmatism are mostly corrected by wearing astigmatic glasses.

In addition, children under the age of 18 astigmatism, because they are in the period of vision development, the adjustment of the eyes is strong, and they should also cooperate with the medication in time, it is recommended to take Leeye Vision Nutrients, twice a day, one pack each time, take it with warm water, insist on taking it for a period of time, which can promote the faster recovery of astigmatism.

a.visual fatigue; Due to the different refractive power of each meridian, the astigmatism cannot form a focal point for the refraction of parallel rays, but two focal lines, so the brain is prone to selective reading of objects. The reason is that astigmatism tends to produce scenes in the direction of the focal line of the myopia; In addition, in order to see the scenery relatively clearly, the astigmatism should be adjusted as much as possible to reduce the size of the diffusion circle and improve the quality of the image. High astigmatism can easily cause headaches if not corrected properly or without glasses.

Symptoms such as eye fatigue, so astigmatism can easily produce eye fatigue. b.Vision loss:

The color of the optoscope in the direction of the focal line of the astigmatism away from the retina becomes lighter, the edges are blurred, it is not easy to recognize, the vision is reduced, and in severe cases, diplopia is produced. In addition to physiological astigmatism, all kinds of astigmatism can easily cause vision loss. Hyperopic astigmatism has better visual acuity than myopic astigmatism due to accommodation.

For example, the same degree of astigmatism, farsighted astigmatism is generally about the visual acuity; The visual acuity of myopic astigmatism is generally left and right; When oblique astigmatism is used to look at the optoscope, the optoscope is prone to deformation. "Long hair''phenomenon, often due to deformation, resulting in reduced vision. Therefore, the correction of the axis position of oblique astigmatism is particularly important.

Hello, astigmatism will cause dizziness or dizziness, headache, blurred vision, etc., if the vision is clear and there is no ghosting, there is no need to have astigmatism, even if it is only 25 degrees but the vision is blurry and there is ghosting, it also needs to be equipped with astigmatism.

Astigmatism is a condition of refractive error of the eye, which causes astigmatism due to the inconsistent curvature of the cornea or lens surface, such as a rugby ball, resulting in the different refractive power of the two meridians perpendicular to each other and unable to focus a little, forming an unclear or overlapping image, which is not clear from far and near.

Regular astigmatism: 1. Blurred vision: seeing things is in a divergent state, not concentrating light, looking at lights with phantoms, looking at objects with double vision or double vision; 2. Visual fatigue: After reading or reading for a long time, the eyes will be sore, and even cause headache, dizziness, nausea and other symptoms.

Irregular astigmatism: The cornea is not round and has local pits. The main causes of irregular astigmatism are trauma, keratoconus, poor visual quality, distortion and phantom vision.

Judging from your description, consider that the child is born with heredity, congenital dysplasia, resulting in uneven corneal surface, abnormal astigmatism, resulting in decreased vision, and in general, may affect distance vision. It is recommended that if you want to make a diagnosis, it is best to choose an eye examination in a regular public hospital for visual acuity, optometry, audition and fundus, and if the child's astigmatism is indeed found, if it has an impact on vision, you can use atropine eye ointment to dilate the pupils, and then wear suitable glasses for the child to correct.

The most common causes of astigmatism are abnormal changes in corneal curvature, lens subluxation, and changes in the refractive index of various parts of the lens. The main symptoms of astigmatism are as follows: first, if astigmatism is slightly severe, people will feel blurry when looking at objects near or far; Secondly, vision loss and double vision occur in the most severe cases.

Thirdly, high astigmatism is prone to headaches and visual fatigue if not corrected correctly or without glasses. Fourth, high astigmatism is prone to amblyopia.

Seeing things ghostly, dizzy, blurry.

Seeing things clearly, not clearly, having double vision, dizziness.

Astigmatism can cause vision loss, blurred vision, visual fatigue and other conditions, and naturally such a situation for a long time will also cause the eyes to look dull.

Astigmatism is a refractive abnormality of the eye that is related to the curvature of the cornea. Some people have a curved cornea in one angle and flatter in others. The cause of astigmatism is that the refractive rate of each meridian of the cornea is inconsistent due to the uneven thickness of the cornea or the uneven curvature of the cornea, so that the light rays passing through these meridians cannot be concentrated at the same focus, and the light rays cannot be accurately focused on the retina to form a clear image, which is called astigmatism.

Astigmatism simply means that the development of the eyeball is not good, and there is a phenomenon of unevenness. And now there are more and more people with astigmatism, and eye astigmatism is directly related to the serious lack of vision nutrients, and the idea of being trapped in a sedan car is a bad habit of using eyes.

Eye astigmatism first needs to be supplemented with vision nutrients in time, it is recommended to take Joy Vision Nutrients, and talk about two closed canopy thoughts a day, one pack each time, take it with warm water, insist on taking it for a period of time, and astigmatism will gradually be controlled or improved.

The other 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 characterized by blurred vision and visual fatigue. Low-grade astigmatism is generally unaffected, while moderate and high astigmatism is not affected by both distant and near vision. Patients with astigmatism often have eye pain, headache, especially in the forehead, double vision, and close work cannot be sustained.

1. Blurred vision:

1) Patients with mild astigmatism: generally have normal vision, but if they see at a certain distance for a long time, they may have blurred vision and eye fatigue.

2) Patients with severe astigmatism: vision is generally abnormal, and blurred vision usually occurs. After prolonged near vision, eye discomfort, double vision, reading streak, and even headaches may occur.

2. Vision fatigue: Vision fatigue is a common symptom of astigmatism, which is manifested as eye pain, tearing, double vision, unstable vision, inability to work at close range, headache and other symptoms of visual fatigue. Astigmatism is hazy both far and near, and often shortens the distance from the fixation object with the help of the adjustment function to achieve self-correction, so accommodative visual fatigue often occurs, which is common in farsighted astigmatism.

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.

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.