Myopia of four hundred degrees belongs to the true myopia, this situation can not be restored to normal, any publicity can make myopia back to normal methods are not scientific basis, it is recommended not to blindly believe. The development of myopia is an irreversible process, with the emergence of myopia and aggravation, eye length is also gradually increasing, this process is impossible to reverse, so myopia is also impossible to return to normal. For the correction of myopia, there are still various correction methods to improve vision, including wearing frame glasses or corneal contact lenses, which can restore the corrected vision to normal and maintain this state, avoiding the occurrence of eye fatigue. For adults, there are also surgical options to correct myopia, such as excimer laser surgery or femtosecond laser surgery, which allow the eyes to maintain normal vision without the need for glasses. However, this surgery only changes the refractive state of the cornea and does not change the fact that the eye is nearsighted.