1.What are RGP lenses? RGP (Rigid Gas Permeable ContactLens) is a rigid oxygen permeable corneal contact lens. It is made of high oxygen permeable material, and ensuring sufficient oxygen transmission rate is an important factor to ensure healthy and transparent cornea. It is clinically proven to have superior performance in oxygen permeability, firmness, wettability, and anti-precipitation, and is known as a “breathing contact lens”. 2. Will RGP damage the cornea? RGP relies on the tear film layer on the surface of the eye to adhere to the cornea, not directly rubbing the cornea, and has high oxygen permeability, the impact on the cornea is less than ordinary soft lenses, more suitable for long-term wear. 3.What people are RGP suitable for? All kinds of refractive errors can wear RGP, and the following refractive errors are particularly suitable for RGP: 1, never worn contact lenses and myopia deepening fast adolescents; 2, highly myopic, farsighted; 3, corneal irregular astigmatism can not wear frame glasses 4, refractive disparity, bifocal refractive error affects the function of both eyes 5, due to corneal problems or diseases that affect vision, such as cone cornea, corneal transplantation or corneal refractive error. Corneal transplantation or keratomileusis latter, etc. 4, the difference between RGP and soft contact lenses ① RGP has higher oxygen permeability compared to soft contact lenses, to avoid corneal edema caused by hypoxia, corneal endothelial cell changes and other eye diseases. ②RGP has better molding than soft contact lenses, which can effectively correct astigmatism and get clear vision. ③RGP has a therapeutic and mitigating effect on early cone corneas and those with a tendency to cone corneas. This is unmatched by traditional soft lenses. ④RGP has better anti-precipitation properties than soft contact lenses, the lenses are less likely to form precipitates, easier to care for, the lenses last longer and are less likely to cause eye inflammation. ⑤ In the initial wearing, RGP than soft contact lenses foreign body feeling strong, need to gradually grow wearing time, gradually adapt, 2-3 weeks later will gradually become better, so not suitable for occasional wearers. 5.What tests are needed when fitting RGP? ①Check the health condition of the cornea, eyelids, conjunctiva, anterior chamber, etc.; ②Check the medical optometry to determine whether it is suitable for RGP; ③Check the corneal curvature and corneal topography as a reference for lens base arc selection; ④Take half an hour to wear the trial lens to reach the stable state of the lens, and then evaluate the lens wearing effect to help determine the lens parameters. RGP is a difficult contact lens to fit, and only by strictly following the above fitting process can we provide the most accurate and comfortable lenses to our customers. The optometrist’s skills and experience are required, and it is necessary to go to a regular hospital for accurate fitting. After wearing RGP, we need to pay attention to: 1. the maximum wearing time is 12 hours per day. 2, lens care and wearing operation method should be strictly in accordance with the requirements of operation, if found that the lens has broken, scratches, absolutely can not wear. 3.After wearing, you should follow the doctor’s time for follow-up, within 1 month and once every 3-6 months afterwards. 4, in a sandy, dusty environment or when going out, it is best to wear sunglasses to prevent sand and harsh glare. 5.If eye discomfort such as eye redness, eye pain, photophobia and tearing occurs during wear, you should stop wearing them immediately and go to hospital for examination to avoid delaying the condition.