There is no direct relationship between 600 degrees of myopia and visual acuity. If a person has 600 degrees of myopia, his bare eye vision, that is, his vision without glasses may be 0.1, or 0.5 or 0.6, or 0.2, but his corrected vision, that is, his vision with glasses may be about 1.0, 1.2, or 0.8. Myopia 600 degrees, this only means that his refractive error has 600 degrees of myopia, need to wear glasses to correct, this is not directly related to his final vision. Some people with 600 degrees of myopia will have very poor vision, and some people with 600 degrees of myopia will have very good vision, so the number 600 degrees of myopia alone cannot determine what his vision will ultimately be. Vision is determined through vision tests, and myopia is determined through optometry, and the two are not the same thing.