Keratoconus lenses are mainly made of RGP material. The two are related, but RGP is only a material and keratoconus is a lens. RGP material, also known as gas permeable rigid material, keratoplasty lenses are made of gas permeable rigid material, the two have obvious correlation, but they are still two different substances, and RGP can only be used as a production material, while keratoplasty lenses belong to a kind of lens, which is also commonly referred to as a kind of contact lenses in life. At the same time, the lens also contains silicone, fluorine and other polymers, which can increase the amount of oxygen passing through, and also has good wetting and anti-sedimentation properties. It has also been clinically verified by ophthalmologists for the correction of true myopia in adolescents and the control of conical cornea. However, when wearing RGP, it is necessary to pay attention to identify its front and back to avoid foreign body sensation, and patients also need to pay more attention to lens care, cleaning, disinfection and storage in accordance with the prescribed procedures. It is recommended to learn more about RGP materials and keratoplasty lenses and distinguish them correctly.