A myopia of 700 degrees is not particularly high and meets the criteria for surgery. However, this is not the only criterion for surgery, but also to exclude whether there are other active diseases in the eye, whether there are systemic diseases, and whether the age is too young. In general, the surgery is required to be done at the age of 18 or above, and the refractive status should be relatively stable in the past two years, with a change of less than 50 degrees per year, otherwise, after the surgery is done now, 700 degrees will be done, and next year 100 degrees will grow again, and the vision will still not work, and the vision will still be blurred. In addition, there are also requirements for the thickness of the cornea, which usually requires the stromal bed underneath to be at least 250μm after cutting the cornea. In addition, there are requirements for the diameter of the pupil, which should be measured in a dark room or under general illumination to prevent some patients from having problems with glare and night vision after surgery.