700 degrees of myopia is a high degree of myopia. To accurately understand the concept of 700 degrees of myopia, we can analyze it in terms of the eye axis. Under normal circumstances, the length of the adult eye axis is about 24mm, while the eye axis of 700 degree myopia reaches at least 26-27mm. Therefore, the length of the eye is about 3mm longer than normal, which will bring a series of complications, including protrusion of the eye, posterior scleral vitreous swelling, vitreous liquefaction, vitreous clouding, retinal pigment disorder, optic disc atrophy arc, macular cleft, etc. These All of them are caused by the longening of the eye axis. Therefore, 700 degrees of myopia is a relatively dangerous situation, and it is important to have regular fundus examinations in order to detect the problem early and intervene early.