The more severe myopia of 700 diopters at 30 years old is high myopia and has a higher risk of developing myopic fundopathy. In addition to causing a decrease in naked eye vision, which causes patients to see things blurred in general, 30-year-old myopia 700 degrees is also prone to fundus complications, such as retinal tears, retinal atrophy, etc., and such lesions can have a very significant impact on the patient’s vision. For 30-year-old patients with 700 degrees of myopia, eye axis lengthening can occur, and the eye axis in the process of lengthening can cause retinal and choroidal damage, and patients may develop choroidal neovascularization. If the patient’s neovascularization occurs bleeding, it can cause sudden vision loss. Therefore, myopia of 700 degrees at the age of 30 is more serious, and patients need regular fundus examination to detect fundus lesions in time. It is recommended that patients with high myopia should consult a doctor in time to evaluate their condition and follow the doctor’s instructions for treatment.