Is it possible for myopia and farsightedness to exist at the same time?
Can hyperopia and myopia exist at the same time? If hyperopia and myopia are present at the same time, there are generally two cases: mixed astigmatism and refractive error.
Mixed astigmatism
Myopia refers to the imaging of external objects before the retina due to excessive length of the eye axis or excessive refractive force of the lens, and hyperopia refers to the imaging of external objects behind the retina due to the short axis of the eye or the refractive force of the lens.
Therefore, it is generally impossible to have both nearsightedness and farsightedness in the same eye.
But one situation can occur, that is, hyperopia plus myopic astigmatism, also known as mixed astigmatism. It can be checked out by refraction, and it is recommended that parents find it in time and correct it in time to avoid delaying the condition.
Refractive errors
One eye is farsighted and one eye is myopia, which is not difficult to understand. The size of the eye axis development of the two eyes is different, for example, the degree of myopia in both eyes will be inconsistent in many people.
In addition, there will be a normal eye, one eye nearsightedness or farsightedness, just like some people will have a deviation in the size of their feet, and sometimes the length of the arm will be different.
The phenomenon that one eye is in a state of myopia and the other eye is in a state of hyperopia can occur, and people grow and develop like this.
This condition is called "refractive jaggedness." ”
Hazards of refractive errors
The harm of refractive error is heavier than ordinary myopia and farsightedness, and it is necessary to correct it in time, because the degree gap is somewhat large, if it is not corrected in time, it will form amblyopia.
It is impossible to develop from myopia to farsightedness, but it is also entirely possible to develop from farsightedness to myopia.
Children with congenital hyperopia, as they grow and develop, the eye axis will gradually elongate, and over time will form myopia, but most of the high farsightedness can not develop into myopia.
Do eye exams in a timely manner
As a parent, you should observe the child's vision in time, and when the child is about 3 years old, parents should take the child to a professional institution for eye examination to facilitate early detection of the disease, "whether it is myopia, farsightedness, mixed astigmatism or refractive error, the sooner the better, if not corrected in time, it is easy to form amblyopia." ”
Special reminder: Parents should observe the situation of children's eyes, such as the child's "right eye", "strabismus", etc., and it is recommended to go to the doctor after discovery, the earlier the treatment effect, the better.
Some of the content of the article comes from the Internet, if there is infringement, please contact to delete