Is myopia hereditary? Is myopia hereditary?

Myopia is the result of a combination of genetics and environment.

Myopia can be divided into two types, namely high myopia and common myopia. Common myopia, also known as simple myopia, can occur from childhood, to the age of 20 that is rarely progressed, after wearing glasses vision can be corrected to normal, myopia is generally below 600 degrees. High myopia, also known as progressive myopia, is another eye disease completely different from simple myopia, with the increase of age, the anterior and posterior axis of the eye continues to lengthen, the back of the eye expands, accompanied by degenerative changes in the veinal retina of the fundus, and the vision is difficult to correct to normal after wearing glasses, and the vision gradually decreases, so that serious disorders occur.

According to the results of the investigation of eye diseases, the incidence of myopia in family members with a family history of myopia is higher than that of those without a family history of myopia, indicating that the incidence of myopia is related to heredity. However, the occurrence of myopia is affected by acquired environmental factors, so at present, scholars believe that myopia belongs to polygenic inheritance, that is, patients have multiple pathogenic genes, but there are environmental factors, which is a phenomenon that is easy to see in the occurrence of simple myopia. Environmental factors include poor lighting, poor reading and work habits, such as long hours of reading and close work, and a constant state of tension and contraction of the regulatory muscles of the eye, which in turn weakens the ability to accommodate, resulting in myopia.

But under the same conditions, not all people develop myopia, and some people with myopia do not do near work or rarely read books and newspapers. It can be seen that myopia is the result of a combination of genetics and environment.

For high myopia, it is thought to be caused by autosomal recessive inheritance. That is, both parents are highly myopic (note: this refers to high myopia!).

If one parent is highly myopic and the other is a gene carrier (no myopia), the expected incidence of high myopia in a child is 50; If neither partner has high myopia but is only a gene carrier, the incidence of high myopia in the child is 25.

For children, if one parent has a high degree of myopia, the child is more likely to develop myopia. Let's see if your child is prone to myopia!

Myopia is related to genetic factors, but if parents are nearsighted, children are not necessarily nearsighted. With proper protection and eye care, children can avoid myopia.

There is a certain genetic predisposition to moderate to high myopia. In addition, it is mainly related to eye fatigue at close range. Therefore, actively controlling the development of the degree is also an effective way to avoid myopia heredity. For the prevention of myopia, the development of the first instrument to control the degree is the mainstay. ]

If the degree of myopia is not high, it is fine, but if the degree is relatively large, the probability of inheritance is very high! ]

The heritability rate is relatively high, but paying attention to eye hygiene in the later stage can also avoid bad luck. ]

Even if there is some kind of genetic predisposition, it is not 100% inherited. Or it may be related to the individual's living habits, learning methods, and eye habits. So it's not the parents who are myopic, the child must be myopic.

It can only be said that comparatively speaking, children are more likely to develop myopia than other children, and the probability of myopia increasing is a little faster. If you pay attention to the scientific use of your eyes in your life, including farsightedness and avoid using many electronic products at close range, it is not necessarily that your child will definitely develop myopia.

Myopia may be inherited, but it is not necessarily inherited as long as myopia is inherited. The heredity of myopia is more complex, and the higher the degree of myopia, the greater the possibility of inheritance. If both men and women are highly myopic, the probability of their children developing myopia is about 90% or more.

However, if the child is not myopic itself, a child born after the combination of a myopia gene carrier and the other party with high myopia has a 50% chance of myopia.

Therefore, both parents should protect their eyes and slow down the rate of progression. Reduces the likelihood of heredity after pregnancy.

One of the phenomena of genetics is the emergence of generations and the aggregation of genetic offspring, which means that the offspring have an increasing incidence in certain situations. However, genetically the probability of such aggregation is generally no greater than 3%.