Why is the eye astigmatism

summary

Now more and more people are wearing glasses, and many children are prone to astigmatism, from the small with eyes is very affect childhood, and share the reasons for astigmatism.

Why is the eye astigmatism

Reason 1: regular astigmatism is caused when the corneal curvature is inconsistent with its vertical direction in a certain direction. It has many types, including simple hyperopia astigmatism, simple myopic astigmatism, compound hyperopia astigmatism, compound myopic astigmatism and mixed astigmatism. It is mostly caused by the different refractive ability of cornea, and exists at the same time with myopia or hyperopia. This does not need surgery, just need glasses to adjust, usually pay attention to protect the eyes.

Reason 2: in the same meridian, or in different parts of the same meridian, the performance of refractive power is different, which is called irregular astigmatism. Very mild anisometropia on the meridians is considered physiological. For example, the lens refractive error, the degree of light, may not feel. Irregular astigmatism may occur only when the diopter deepens, such as in the early stage of cataract. Sometimes this defect can cause polyopia.

Reason 3: the reason of irregular astigmatism: irregular astigmatism is mainly caused by the uneven corneal refractive surface, such as corneal ulcer, scar, keratoconus, pterygium and so on. Irregular astigmatism: can be corrected with contact lens.

matters needing attention

People with astigmatism should not lie down and look at mobile phones in life, and should pay attention to eating some food rich in protein, guide young children to develop good health habits, and do not casually touch their eyes with hands or chemicals, so as to avoid eye diseases. If they are infected with eye diseases, they should try to avoid going out.