First of all, you need to explain and clarify a few issues or some myopia knowledge: First, the cause of myopia is very complex, but it is also very simple, is the congenital and acquired two reasons: congenital mainly by genetics and perinatal influence, born after the genes have been decided, generally can not change, which is why some people never watch TV very careful maintenance, still myopia is very strong! The latter is mainly related to the use of the eyes, modern people near the time with the eyes greatly exceed the time with the eyes, so now myopia more and more. This is the influence of the environment! The next day, the more you look at the distance and less you look at the near, the more useful it is to prevent myopia! So you said to our hospital many times to check, but the cause is unknown or not found, the answer is actually very simple, is also very clear. Secondly, children should ideally have mild farsightedness in their early years so that they are less likely to become myopic in the future, because the farsightedness will gradually decrease with age and gradually develop in the direction of myopia, your child was myopic at the age of 6, and it was almost certain that he would be myopic in the future, and the myopia would be deeper (as it turned out later), and during his growth and development, the myopia Myopia tends to grow rapidly during his growth and development.
During this period, if you pay close attention to the use of the eyes, together with some drugs, you can slow down the increase in the number of degrees, but it is basically impossible to stop or go back, so you say that no improvement, but 100 degrees per year deepening, itself is the development of such ah (like he wants to grow taller), generally until about 18 years old to gradually stabilize. Third, the doctor suggested wearing RGP, mainly because your child has a large astigmatism, while wearing RGP has a certain role in controlling the development of myopia. What you need to do now is still to come to the hospital regularly to review and replace the lenses when necessary, other methods can be considered according to the situation, but the control of myopia is very limited!