What symptom is eye astigmatism?

summary

Astigmatism is a kind of abnormal refraction of the eye, which is related to the curvature of the cornea. After parallel light enters the eye, due to the different refractive power of the eyeball on different meridians, it can not focus on one point (focus), and it can not form a clear image, which is called astigmatism. Astigmatism can not form a clear image with the help of adjustment or moving the distance between the target and the eye. Only by wearing a suitable cylindrical lens can a clear image be formed on the retina. According to the manifestation, astigmatism can be divided into regular astigmatism and irregular astigmatism. What symptom is eye astigmatism? Let's talk about it

What symptom is eye astigmatism?

The degree and type of astigmatism are closely related to the decrease of vision. People with mild astigmatism usually have normal vision, while those with moderate and high astigmatism have poor near and far vision. The visual acuity of simple astigmatism decreased slightly, the visual acuity of compound astigmatism and mixed astigmatism decreased obviously. Amblyopia can be formed if the correction is not good.

The blurred image on the retina needs to be adjusted constantly, and the vision is distorted, so astigmatism, especially hyperopia astigmatism, is prone to visual fatigue. The symptoms included eye pain, tears and headache, especially in the forehead, double vision and unsustainable close work.

In order to see more clearly, the patients with highly asymmetric astigmatism often take tilted head position, resulting in strabismus, which can be recovered after astigmatism correction. Sometimes, in order to get a larger image of the retina, the patient often takes the object close to the eye like the myopic patient. People with high astigmatism often squint when looking at distant or near targets to achieve pinhole and fissure effect, so as to improve vision. Through pinholes or cracks to see things, you can reduce the impact of astigmatism on vision.

matters needing attention

It is best to have the first full eye examination at the age of 3-4, and then have regular eye examination 1-2 times a year. Guide children to develop good health habits, do not touch eyes with hands or chemicals, in order to avoid eye diseases. Reading time line to be adequate, the best light from the left rear; Reading posture should be correct, and keep the distance between 30 cm and 40 cm.