The hazards of high astigmatism

Many people do not pay attention to healthy eye use and accidentally become nearsighted. People who are not nearsighted think it is no big deal, but people with myopia, especially those with severe myopia, know the disadvantages of myopia. Mild myopia can make life and study inconvenient for people, while severe myopia can not only make life inconvenient for people, but also cause headaches. High astigmatism is extremely disturbing and can cause headaches and poor memory. So what other dangers does high astigmatism have?

What are the dangers of high astigmatism?

1. Causing headaches, eye soreness and other phenomena: If high astigmatism is not corrected, it is more likely to cause headaches, eye soreness and other phenomena, and it is also easy to cause bad postures such as tilted head; therefore, those with severe astigmatism must be corrected.

2. Visual fatigue: Astigmatism has different refractive powers on different meridians, and parallel light rays cannot be refracted into two focal lines instead of a focus, so the brain tends to selectively interpret the image. The reason is that astigmatism can easily produce scenes in the direction of the focal line near the retina; in addition, in order to see the scenery relatively clearly, the astigmatism eye must use adjustment as much as possible to reduce the size of the diffusion circle to improve the quality of the image; high astigmatism can easily cause symptoms such as headaches and visual fatigue if it is not corrected properly or without wearing glasses, so astigmatism can easily cause visual fatigue.

3. No matter far or near objects are viewed, they all feel blurry: People with severe astigmatism feel no matter far or near objects are viewed, they all feel blurry. Patients often have the habit of half-closing their eyelids and squinting them into slits in an attempt to see objects more clearly.

4. Decreased vision: In astigmatism, the color of the sight mark in the direction of the focal line away from the retina becomes lighter, the edges become blurred, and it is difficult to identify, resulting in decreased vision and double vision in severe cases. Except for physiological astigmatism, various types of astigmatism can easily cause decreased vision.

5. Pressure on the eyeball: Astigmatism is usually corrected with regular glasses or contact lenses. It is usually congenital, but there are also some acquired causes. The simplest example is that trauma and chalazion on the eyelid that are not treated in time will cause long-term pressure on the eyeball and cause astigmatism. In some cases, astigmatism may be combined with pseudomyopia. In this case, the pseudomyopia should be removed and the astigmatism should be corrected with glasses.

6. Amblyopia: This disease is more common in people with high astigmatism, especially hyperopic astigmatism. Because they cannot see clearly both far and near, their vision is not exercised, which makes it easy for them to develop amblyopia, and then there is a tendency to develop strabismus.

What should I do if I find that I have astigmatism?

1. Regular astigmatism: can be corrected with different cylindrical lenses according to the type and degree of astigmatism;

2. Irregular astigmatism: can be corrected with contact lenses;

3. Adults over 20 years old with high astigmatism may consider corneal refractive surgery.

Medication principles:

1. All astigmatism eyes must be dilated for optometry, especially for mixed astigmatism;

2. Preschool children should use 1% atropine eye drops or eye ointment to dilate the pupil for three consecutive days before retinoscopy.

3. Generally, adolescents use tropicamide eye drops to dilate their pupils for optometry;

4. A few patients will have flushed face, redness of neck, body and dry mouth after using atropine. This is a mild reaction to atropine. As long as you drink more warm water, the symptoms will disappear after 1-2 hours. Generally, after instilling atropine eye drops, press the lacrimal duct near the root of the nose with your fingers for about 10-15 minutes to prevent the drug from flowing into the lacrimal sac for absorption. If the pressure is good, the above symptoms will not occur.