Whether myopia of 500 diopters at the age of 12 will exceed 1000 diopters at the age of 18 depends on the circumstances, and it is possible. 12-year-old myopia 500 degrees if daily not pay attention, no good protection, will lead to a substantial increase in myopia, is possible at the age of 18 more than 1,000 degrees. It is recommended that children should use their eyes moderately, and if it is well controlled, such as an annual increase of about 50 degrees, it belongs to a normal range, and there is no need to worry too much. As the causes of myopia increase are also multi-faceted, long-term use of electronic products, irregular use of the eyes, excessive close-up use of the eyes, or in a poor vision environment for a long time excessive use of the eyes, will lead to excessive increase in myopia, it is recommended that the patient to go to the hospital in time for correction.