RGP has the reputation of being a “breathing contact lens” and its most prominent advantage is its high oxygen permeability. Compared to soft contact lenses, RGP’s oxygen permeability is seven times higher. This ensures that the cornea receives sufficient oxygen, and because RGP is water-free and resistant to precipitation, it is more effective in preventing many of the complications associated with wearing soft contact lenses, thus contributing to eye health. Therefore, RGP is currently the safest contact lens to wear. RGP has better optical performance than soft contact lenses. After wearing, RGP can form a good fit with the cornea and get a clearer visual effect. In particular, RGP can make astigmatism, refractive disparity patients get a good correction. 3.It is beneficial to slow down the deepening of myopia During the fitting process, it was also found that RGP can effectively stop or slow down the progression of myopia in children. In addition, RGP has a controlling and slowing effect on early cone corneas and those who have a tendency to cone corneas.