What causes astigmatism

summary

My son has been in junior high school this year. When he was in the first grade of junior high school, he was found to be short-sighted. Since my son ate, I often asked him to eat more fish products to improve his eyes. However, the situation has not been improved very well. Recently, my son told me that his glasses are a little blurred, so I took my son to school The optical shop has made an examination, and the owner of the glasses said that my son's astigmatism is relatively high now. What's the matter with astigmatism? Let's introduce it first.

What causes astigmatism

First, there are many specific reasons for astigmatism. First, if the cornea of the patient's eyes begins to change after the onset of the disease. The external light can not form a focus on the omentum. The field is diffuse, so that the brain's understanding of the external objects appears a blur, which produces astigmatism.

Second: in addition, there is also a clinical disease called regular astigmatism, which occurs when the angle of the cornea of the patient is inconsistent with its vertical direction in a certain direction. There are many types of astigmatism, including simple hyperopia astigmatism, simple myopia astigmatism, compound hyperopia astigmatism, compound myopia astigmatism and mixed astigmatism.

Third: generally due to patients with corneal uneven, or irregular disease, the first is a certain congenital genetic factors, the other is due to acquired corneal disease. Such as. Corneal ulcer or trauma, healing after the scar, will cause corneal uneven, curvature is not correct.

matters needing attention

It is suggested that patients should develop a good habit of using their eyes in daily life and avoid using computer, TV and other electronic products for a long time. In addition, patients in the daily diet should also take more green food to help the body supplement vitamins.