How to tell if your eyes are astigmatism
Generally speaking, children under the age of 14-15 are recommended to do dilated refraction, 14-18 years old advocate dilated refraction, and adults can be called small pupil refraction, that is to say, there is no need to dilate pupils, because the adjustment power of this age is relatively weak, and the refractive error including astigmatism can be more accurate without the method of dilating pupils.
That is to say, the method used for the examination and diagnosis of astigmatism in adults and children is different from that used in this assessment, and of course it is necessary to go to a professional department to make a diagnosis. The way to diagnose and diagnose astigmatism is to go to the hospital and do a dilated pupil examination to confirm the diagnosis.
How astigmatism is caused
Astigmatism is mainly related to the uneven curvature of the cornea, so after the parallel rays enter the eye, the refractive power on different meridians is different, so it is impossible to form a unified focus on the retina. We know that in daily life, many people have astigmatism in their eyes, and they are very confused, because they do not have a history of flashes in their families, so they think that they should not have astigmatism, of course, we know that astigmatism does have a strong family hereditary. Generally speaking, if the parents have a relatively high degree of astigmatism, the probability of the child will be much higher, but if the parents' astigmatism is not high, the child may not necessarily have astigmatism. Therefore, although astigmatism has a lot to do with familial inheritance, it does not mean that it is completely determined by familial inheritance.
What are the symptoms of astigmatism?
What are the symptoms of astigmatism? Astigmatism is caused by the fact that the refractive index of the external object in all directions of the eye is different, and the image of the external object projected on the retina cannot be focused on the retina, forming a clear focus, which is the so-called astigmatism.
1. Mild astigmatism, if it does not affect vision, generally has no obvious symptoms.
2. In childhood, if there is a relatively high astigmatism, it will affect the development of vision and cause amblyopia, that is, the child may not see far or near clearly.
3. There may also be some symptoms such as easy visual fatigue, eye swelling and pain, etc.
4. Some people with obvious astigmatism, and they have not been corrected, and there may be a phenomenon of crooked vision.