Judging from the degree of glasses and the refractive index of lenses. According to the query, the guest glasses network display. Puno pupillary orthokeratology is a specially designed hard breathable contact lens. The higher the lens degree of orthokeratology lens, the greater the drop, the higher the refractive index of the lens, and the greater the drop. Puno pupillary orthokeratology corrects myopia and astigmatism by changing the curvature of cornea. It can also be worn during sleep, and the geometric shape of cornea can be changed through the hydrodynamic effect of physiological tears to achieve the purpose of correcting vision.