What causes astigmatism?

What causes astigmatism?

Astigmatism, generally speaking, is mostly caused by congenital abnormal changes in the cornea, while acquired factors, such as poor long-term eye posture: lying reading, lying down reading, squinting or squinting reading, etc.

Therefore, the daily eye care of astigmatism patients is mainly to work and rest regularly, do not stay up late and avoid visual fatigue; Pay attention to the scientific use of eyes, do not blow the air conditioner for too long, and avoid staring; Eat more fruits, especially citrus fruits and green vegetables.

What harm does astigmatism have?

01 headache and sore eyes

If high astigmatism is not corrected, it is easy to cause headache, eye acid and other phenomena. At the same time, it is also easy to cause bad posture such as crooked head. Therefore, those with severe astigmatism must be prevented and controlled in time.

02

Visual fatigue

Due to the different refractive power on each meridian, the astigmatism eye cannot form a focus on the refraction of parallel light, but two focal lines. In order to see the scene clearly, the astigmatism eye should use adjustment as much as possible to reduce the size of the dispersion circle to improve the image quality.

03

Blurred vision

Those with severe astigmatism, regardless of the far and near objects, feel blurred. Patients often have the habit of narrowing their eyes into a gap, trying to see the objects more clearly.

04

Vision loss

The color of the visual target far away from the focal line of the retina becomes lighter, the edge is blurred, it is not easy to identify, the vision decreases, and diplopia occurs in severe cases. In addition to physiological astigmatism, all kinds of astigmatism are easy to cause vision loss.

05

amblyopia

This can be said to be the most serious harm. Most of them occur in patients with high astigmatism, especially patients with hyperopia astigmatism. They often can't see things far and near. In this case, vision can't get good exercise, which is easy to cause amblyopia symptoms, and strabismus if serious.

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