Myopia of 600 degrees cannot be restored. Myopia is generally classified as mild, moderate and high myopia. Mild myopia is generally less than 300 degrees, moderate myopia is between 300 and 600 degrees, and high myopia is more than 600 degrees. High myopia is mainly influenced by genetic and environmental factors and generally has a long eye axis, the normal eye axis is 24 mm. the treatment of long eye axis is mainly to wear frame glasses or corneal contact lenses, if the degree is stable within two years, there is no significant progress, no myopia-induced comorbidities, you can also do refractive surgery.