How is myopia to return a responsibility?

summary

Astigmatism is often aggravated by poor eye posture. For example, reading while lying prone, even squinting or squinting, can cause improper eyelid pressure on the eyeball, and affect its normal development. Therefore, it is only by giving up bad habits that astigmatism and myopia can be prevented. And these habits are often the cause of myopia, so some people think that myopia will cause astigmatism, in fact, there is no relationship between the two. What's the matter with myopia?, Now let's take a concrete look.

How is myopia to return a responsibility?

First, the cause of astigmatism curvature astigmatism: caused by abnormal changes in corneal curvature. If the meridian with the largest refractive power and the meridian with the smallest refractive power are perpendicular to each other, regular astigmatism is caused, which is mostly congenital, and the degree of astigmatism is large.

Second, the cause of astigmatism eccentric astigmatism: previously, it was often seen in crystal displacement, such as congenital deviation, subluxation of crystal, etc; In recent years, due to the increase of refractive corneal surgery, astigmatism caused by the deviation of PRK and LASIK surgery facula from the optical center can also be seen in clinic.

Third: the cause of astigmatism - refractive astigmatism: the refractive index of each part of the lens changes. Astigmatism degree is generally small, such as senile cataract, lens cortex water gap, feathery opacity, resulting in changes in the refractive index of the lens, can form astigmatism.

matters needing attention

In fact, there are many phenomena that lead to these two situations at the same time. Another reason is that they do not pay attention to good eye hygiene. Usually a long time with eyes should pay attention to the appropriate rest.