What symptom and feeling does eye astigmatism have?

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 and feeling does eye astigmatism have? Let's talk about it

What symptom and feeling does eye astigmatism have?

Visual fatigue: 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. Young people with compound hyperopia and astigmatism can often make up with adjustment. According to the degree of adjustment, they can form pseudo simple hyperopia astigmatism, pseudo simple myopic astigmatism or pseudo compound myopic astigmatism.

Blur: blurred vision is closely related to the degree and manner of astigmatism. People with mild astigmatism usually have normal vision, but they may have headache, eye fatigue and blurred vision when looking at objects at a certain distance. People with severe astigmatism have blurred and distorted vision. I don't know how to look far and near, but I work close for a long time, i.e. eye distension, headache, reading or double shadow

Normal head position and eye position: in order to see more clearly, people with highly asymmetric astigmatism often take tilted head position, resulting in strabismus, which can be recovered after astigmatism correction. People with high astigmatism often squint when they look at distant objects to achieve pinhole and fissure effect, so as to improve their vision. Through pinholes or cracks to see things, you can reduce the impact of astigmatism on vision.

matters needing attention

For the prevention of astigmatism also need to pay attention to the choice of reading materials when the font should be clear, not too small. The TV is set a little below the eye line. If you want to watch TV, you need to be 5-7 times away from the diagonal of the TV picture.