A 14 year old with 700 degrees of myopia needs to alleviate the pseudomyopia component of it by practicing good eye habits, resting the eyes, etc., and trying to bring it down as much as possible.
A 14 year old child who currently has 700 degrees of myopia is likely to contain both a true myopia component and a pseudomyopia component, where the true myopia component cannot be reduced, while the pseudomyopia component can be lowered through treatment.
Patients should develop good eye habits, do not use their eyes in a violently shaking environment or an environment with insufficient lighting, and should not use their eyes for more than half an hour in a row at close range. Patients should also pay attention to rest their eyes, for example, often do the action of closing the eyes to rest or look into the distance, more outdoor sports and so on.
Currently, a 14-year-old child with 700 degrees of myopia should go to the ophthalmology department of a hospital for a timely examination, so that the doctor can clarify the nature of the myopia, and then instruct the patient to undergo treatment.