Most people believe that only people with steep corneas are more suitable to wear and play a role in controlling myopia growth, while children with long eye axes have limitations in wearing them. In fact, the growth of myopia is more related to the growth of the eye axis. Compared to frame glasses, the correction of keratoconus is not a single arc, but a multi-arc design, corresponding to the aspheric surface of the human retina, which can not only correct the refractive state of the central retina, but also correct the hyperopic defocus of the peripheral retina, which is the principle that can effectively control the excessive growth of myopia in children. After examination, the optometrist concluded that the child’s longer eye axis coincides with myopia and that the myopia is within the corrected range to be fitted with keratoplasty lenses.