A patient with 900 degrees of myopia in the eye is considered highly myopic and has a higher risk of developing retinopathy and is therefore more dangerous. In general, myopia higher than 600 degrees is considered high myopia, 900 degrees of myopia is more serious, usually patients with high myopia have a higher risk of developing fundopathy, such as macular degeneration, retinal split, retinal hemorrhage and so on. Therefore, with more severe myopia of 900 degrees, patients need to avoid strenuous exercise to avoid fundus retinopathy. Myopia can lead to patients’ vision loss, generally the higher the degree of myopia, the more obvious the patient’s vision. Myopia patients can improve their vision by correcting myopia with glasses or surgery. It is recommended that myopic patients seek timely medical attention to assess their condition and follow medical advice for treatment and care.