High myopia refers to myopia with a refractive error of more than 600 degrees. High myopia has very poor distance vision, but near vision is often unaffected, and if you don’t wear glasses for a long time, your vision will be inhibited to form amblyopia. It is recommended that high myopia be found in time for glasses, and that glasses be replaced in time for the annual change in prescription. High myopia refers to myopia of more than 600 degrees, which often has a family history of myopia, mostly axial or curvilinear myopia, axial myopia means that the eye axis is growing every year, perhaps by 0.1-0.2mm per year, and most myopic eyes stop growing after the age of 18. In some cases of hereditary high myopia, the axis of the eye grows every year, even in adulthood, so the axis of the eye may be abnormal, and the retina of high myopia with abnormal axis will degenerate and have many complications, so high myopia must be checked regularly at the hospital.