If a 400-degree myopic patient wearing 250-degree eyeglasses can correct his visual acuity under the relaxation of the adjustment to 1.0 and above, the patient can wear 250-degree eyeglasses, otherwise he cannot wear 250-degree eyeglasses. If 400-degree myopia patients wear 250-degree glasses when the corrected visual acuity has reached 1.0 or above, and there is no fatigue when wearing the glasses for a long time, it is possible to wear 250-degree glasses at this time. However, if the patient wearing 250-degree glasses, in a relaxed state can not achieve 1.0 and above the corrected visual acuity, need to adjust the eye muscles, in order to make the image fall well on the retina, after using the eyes fatigue, that is not enough prescription glasses, in the long run, easy to aggravate the myopia, you can not wear 250-degree glasses. It is recommended that myopic patients seek timely medical attention to assess their condition and under the guidance of a doctor.