Welcome to Health Care magic,
Though it is usually considered as a genetic disorder, but the truth is that only 5% of Myopia
( shortsightedness cases are due to hereditary. Usually it is due to long hours of watching TV, Reading, Computer, or any close eye work.
i would suggest following
Vision should be under corrected ( never over corrected).
Should wear spectacles only while using for far distance.
Must do exercises of eyes to improve her Myopia. You must take advise of Eye specialist, who will explain her and train her for proper exercise according to her age.
Must avoid long hours of doing close work, Must take breaks in between if she has to do.
Take good nutrition, Rich in Vitamins and Minerals
The purpose of these advise is to train her eyes and increase accomodation power of her eyes to focus for the lond distant vision. Your daughter has still low Myopia, it is possible to correct her vision problem if taken care at this time.
I hope, it will help you a lot.