What is astigmatism? There are several misconceptions about astigmatism and wearing contact lenses

Generally speaking, people with astigmatism will habitually squint or tilt their heads when looking at things, and astigmatism will induce visual fatigue, making people feel very difficult to see. The following network wants to share with you some common sense of astigmatism, I hope it will help you.

The main symptom of astigmatism

It is not clear to see far and near; inconsistent line clarity; habits of squinting and torticollis; Symptoms of eye strain, temporary blurred vision, and forehead headache are easily produced; Poor vision in low light and at night.

Treatment of corneal astigmatism

Treatment is based on vision and visual fatigue, and if any of these symptoms are present, even if the astigmatism is small, it should be corrected to eliminate the adverse symptoms. Ordinary glasses are placed in the air at a certain distance from the eyeball, and the eyeball is in a relatively fixed state, while the contact lens is placed on the surface of the eyeball, and the back surface of the lens and the front surface of the cornea are filled with a tear layer, called tear lens, which can form a new surface curvature according to different corneal shapes, especially suitable for correcting astigmatism on the anterior surface of the cornea, and at the same time is not affected by the increase in power, reduces imaging distortion, and maintains normal binocular vision.

Misconceptions about astigmatism and wearing contact lenses

Myth 1: Contact lenses don't have astigmatism lenses

In the current market, there are contact lenses specifically designed to correct astigmatism, such as Bausch & Lomb's Clear Astigmatism Contact Lenses. Because of the problem of the axis of astigmatism, if the lens is rotated, the scene in front of the astigmatism patient will be blurred. This lens adopts a series of high-tech designs, which successfully overcomes the problem of ordinary contact lenses rotating in the eye, and is comfortable to wear, with a high success rate of one-time fitting, simple and easy to match, which brings great convenience to optometrists and consumers.

Myth 2: Astigmatism can be corrected by deepening myopia

If there are consumers with astigmatism who are in glasses, the usual practice is to reduce the astigmatism by half and add it to the myopia degree. For example, if you have 100 degrees of astigmatism and 500 degrees of myopia, then the astigmatism is reduced by half and added to the myopia degree, and the final prescription is 550 degrees. In fact, the problem of astigmatism has not been solved, but it has only deepened myopia. This might:

1. Cause the deepening of myopia and aggravate the symptoms of eye discomfort;

2. Myopia has been corrected, but the phenomenon of astigmatism and ghosting still exists;

3. Symptoms such as headache and eye fatigue, which affect the quality of life;

Therefore, choosing professional astigmatism contact lenses for correction can truly correct the problem of astigmatism and ghosting, so that the vision is natural and clear. In the optometry community, it is believed that astigmatism of 75 degrees and above needs to be corrected with astigmatism lenses, and for astigmatism people who use computers for a long time, work in precision workers or need to read small text for a long time, even if it is mild astigmatism (below 50 degrees), astigmatism lenses should be worn.

The dangers of astigmatism

1. Amblyopia: It is more common in high astigmatism, especially farsightedness astigmatism, because it is not clear to see far and near, and the vision cannot be exercised. It is easy to develop amblyopia, followed by a tendency to develop strabismus.

2. Vision loss: the color of the visual target in the direction of the focal line of the astigmatism away from the retina becomes lighter, the edges are blurred, and it is not easy to identify, the vision decreases, and the severe ones produce diplopia. In addition to physiological astigmatism, all kinds of astigmatism can easily cause vision loss.

3. Visual fatigue: In order to see the scenery relatively clearly, astigmatism should be adjusted as much as possible to reduce the size of the diffusion circle to improve the quality of the image; High astigmatism can easily cause headaches, eye fatigue and other symptoms if it is not corrected properly or if you do not wear glasses, so astigmatism can easily cause eye fatigue.

4. In severe cases, whether they look at distant objects or near objects, they feel blurred: patients often have the habit of squinting their eyelids half-closed into slits in an attempt to make objects see more clearly.

Seven ways to prevent astigmatism

1. When reading a book, the light should be sufficient, and the light should come from the left rear; Reading posture should be correct and kept between 30 cm and 40 cm to prevent astigmatism.

2. Don't read in a rocking car, and don't lie down to read.

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

4. Pay attention to observation, find any problems, and take them to the eye hospital for examination.

5. It is best to have the first full eye examination at the age of 3-4 years, and then regular eye examination 1-2 times a year.

6. Go to the suburbs more, see more green wilderness in the distance, protect your eyesight, and prevent astigmatism.

7. The height of the TV is a little below the parallel line of the eyes, and it must be 5-7 times the diagonal of the TV picture to effectively prevent astigmatism.