How many degrees of myopia will be inherited from offspring

Myopia is a genetic tendency, especially high myopia, normal family history. There is a myopia called progressive myopia, will continue to deepen with age, this myopia is normal genetic reasons. So myopia in addition to genetic factors, acquired is also an important reason. How to get acquired, such as excessive use of eyes, long-term close reading, so that the eyes are always in a state of high fatigue, ciliary muscle spasm, myopia will continue to deepen, so there is no way to control genetic factors, acquired factors can be prevented and controlled.