What are the causes of astigmatism

Update Date: 2023-11-04 Source: Network

summary

Many people, especially young people and teenagers, because of the bad habits in life, resulting in the damage of vision, resulting in the decline of vision, in addition to myopia, but also often astigmatism. Understanding the causes of astigmatism has a good hint for the prevention of astigmatism. I will share some knowledge about the causes of astigmatism!

What are the causes of astigmatism

Astigmatism, the main reason is because the corneal curvature is not caused. The normal corneal surface should be round like a basketball, with the same horizontal, vertical or oblique radius of curvature, so that the light will gather at the same point when passing through. Some people think that myopia will cause astigmatism, but there is no relationship between the two.

The symptoms of visual fatigue are usually related to age and the nature of work. The older the person is, the more moderate astigmatism will be caused by sitting at a table. If it is beyond the normal range, active treatment is needed. It may also be caused by the lens, such as uneven image size, axial movement, lens surface inequality, and sometimes the frame size.

Astigmatism is caused by uneven corneal curvature. Normally, the cornea is uniform and transparent, and the cornea is in the outermost layer of the eyeball. Light first passes through the cornea and then enters the eye. When the light passes through, it will not produce refraction and other deviations. After adjusting through the lens, it can present a clear image on the retina. If it is astigmatism, it will not be clear.

matters needing attention

In the work or study, pay attention to the correct posture: the operation should be correct and comfortable. The center of the computer screen should be installed on the same horizontal line with the operator's chest. The distance between the eyes and the screen should be 40-50cm. It is better to use a chair with adjustable height. You can refer to the reasons for astigmatism in this article, timely prevention!