Let's talk about the answer first, astigmatism can be done for myopia surgery!
What is astigmatism?
Astigmatism is caused by the fact that the eyeball has different diopters in different directions, so that the parallel rays cannot be focused on the same point on the retina after being refracted by the eyeball.
As a result, the eyes are unable to focus, and their vision is blurry and ghostly. The difference between the maximum and minimum diopters of the eye, i.e., the degree of astigmatism. The greater the astigmatism, the more obvious the symptoms of ghosting are.
The effect of astigmatism on vision
Astigmatism, like myopia, is a manifestation of refractive error. The difference is that after parallel light enters the eye and is refracted by the refractive system, if the focus formed by its focus is in front of the retina, it is myopia. If it can't be focused into a focal point, it's astigmatism.
Depending on the degree of astigmatism, it can be divided into four levels: mild astigmatism (within 100 degrees), moderate astigmatism (100-200 degrees), severe astigmatism (200-300 degrees), and high astigmatism (above 300 degrees).
To put it simply, the world of astigmatism is blurry and ghostly. The higher the degree of astigmatism, the greater the degree of blurry ghosting is likely to be.
Myopia + astigmatism, what is the experience?
Myopia is mainly to see blurred in the distance, astigmatism is to see distant and near objects are blurred, and even have ghosting, distorted vision state, the higher the degree of astigmatism, the degree of blurred ghosting may be.
If you have both myopia and astigmatism, in addition to vision loss, double vision, you will also be prone to visual fatigue, and even eye pain and headache, and close work will not last. Seeing things with double vision and getting tired easily after watching for a long time is a typical symptom of astigmatism.
Whether it is myopia or astigmatism, it needs to be corrected as soon as possible, otherwise the development of visual function will be inhibited to a certain extent, and the older you are, the worse the correction effect.
Can myopia and astigmatism be corrected by surgery at the same time?
Minor patients with astigmatism can be corrected by prescription glasses;Patients with stable vision may be treated with myopia surgery to correct astigmatism.
The degree of astigmatism that can be corrected by different myopia surgeries is different, but in general, myopia surgery can correct astigmatism below 600 degrees.
However, if the corneal thickness is not ideal, not everyone can correct it to such a degree, and the specific correction method to choose must be determined through a professional preoperative examination, and the doctor will give a suitable method for the patient through the examination results.
Tips:Professional ophthalmology institutions will conduct about 20 preoperative examinations before myopia surgery to determine whether myopia surgery can be done and what kind of myopia surgery can be done through eye conditions.
Myopia surgery