Myopia has the lowest degree. The lowest degree of myopia that the refractor can detect is 25 degrees, that is -0.25d. The degree of myopia ranges from 25 degrees, 50 degrees, 75 degrees, 100 degrees, and then hundreds of degrees (including: low-grade myopia below 300 degrees, moderate myopia in 300-600 degrees, high myopia above 600 degrees), 1000 degrees, or even as high as 2000 degrees and 3000 degrees (high degrees of myopia, often accompanied by fundus lesions, retinal detachment, fundus hemorrhage and neovascularization risk is higher than normal people Much bigger).
In most myopic eyes, the vision can be improved by wearing appropriate glasses after optometry. Lower degree of myopia, the impact on vision is small, can not wear glasses. Myopia below 100 degrees is considered normal vision and can be without glasses.