It is not normal to reach 8,000 degrees of myopia, and if 8,000 degrees of myopia does occur, the patient is predicted to feel only manual or worse. What we usually call myopia, also called axial myopia, is a condition in which the eye is excessively elongated beyond its normal range, making objects appear in front of the retina. The normal adult eye axis is about 24mm, and for every 1mm increase in the eye axis the number of degrees of myopia increases by about 300 degrees. 8,000 degrees of myopia is equivalent to an increase in the eye axis of about 26.6mm compared to normal, and this degree of myopia is difficult to achieve even when combined with other conditions that change the refractive status of the eye. For the commonly used International Standard Vision Scale, in general, each 25 degree increase in myopia may cause a line or so of blurred vision. The international standard vision chart usually has only 14 rows, and ultra-high myopia of more than 1,000 degrees is usually only visible for a few fingers. In addition, ultra-high myopia patients already have pathological changes in the fundus of the eye, which can result in smaller vision, distorted vision, black shadows in front of the eyes, etc. The degree of vision damage varies depending on the fundus disease. In summary, 8000 degrees of myopia is extremely rare, such as the emergence of this ultra-high myopia, usually can only see the manual at most.