500 degrees of myopia belongs to moderate myopia, under normal circumstances the bare eye vision should be less than 0.1, more than five meters beyond the range, the eyes are unable to see. This situation is still relatively serious, after this situation, must be early to the hospital for an optometry examination, early prescription glasses, in order to effectively improve the corrected vision, to avoid eye fatigue. In general, you should also pay attention to reasonable eye habits to try to slow down the development of myopia. If you still do not pay attention to eye habits, once the myopia exceeds 600 degrees, called high myopia, not only will lead to vision loss, but also easily appear a variety of pathological changes, such as poor night vision, mosquitoes in front of the eyes, floating objects, flash sensation, etc., but also high myopia fundus pathology, all pathological changes are irreversible, once it appears there is no way to regain normal.