At present, RGP is widely used in Japan, which is a leading country in the Asian optometric field, and the world’s largest RGP manufacturer is also in Japan, where the most advanced technology and the highest quality and safe materials are used for each RGP lens. According to statistics, more than 10% of people in Japan wear contact lenses, and 40% to 50% of them wear RGP. The number of wearers in the United States is also increasing. The clinical application in China’s ophthalmology, the efficacy of controlling myopia, once attracted the close attention of many ophthalmologists, know now is also a clinical research hotspot. RGP has the reputation of being a breathing contact lens, and is by far the healthiest contact lens. Its outstanding advantage is that it has a highly oxygen permeable structure, which is healthier and safer, and is less likely to cause hypoxia and dry eye, and will not have an effect on dry eye, let alone cause a decrease in the number of corneal endothelial cells. In addition, the reason why RGP is respected by ophthalmologists worldwide is because of its unique advantages: 1, good molding, not easily deformed, high quality optical correction, especially for some patients with high myopia and astigmatism, the correction effect is better, and has the effect of controlling its development, for various reasons caused by corneal irregularity astigmatism, such as cone cornea, after corneal refractive surgery, after trauma, etc., it is the only It is the only correction method that can effectively improve vision. 2. Even long-term wear will not cause corneal hypertrophy and edema. It also has a certain maintenance effect on the health of the cornea.3 Anti-precipitation, not easy to cause inflammatory reactions due to precipitates.4, high definition, has a certain control effect on the deepening of myopia and astigmatism, especially for adolescents. For early cone corneas and cone corneas tend to have a therapeutic and slowing effect, which is unmatched by traditional soft lenses. General RGP is suitable for people with general myopia, hyperopia, astigmatism and refractive error. It is particularly effective for astigmatism correction, mainly by using the tear lens between the lens and the cornea to form a new optical system that can eliminate corneal astigmatism. Generally, corneal astigmatism within 3.00D can be corrected with ordinary RGP, and for corneal astigmatism or crystal astigmatism higher than 3.00D can also be corrected with special astigmatism lenses. High myopia, farsightedness, astigmatism, irregular astigmatism. Irregular astigmatism is very difficult to correct with frame glasses box soft lenses. rgp also uses the principle of tear lens to eliminate irregular astigmatism from the cornea for correction purpose. It is especially used for the correction of corneal irregular astigmatism formed after corneal trauma or corneal surgery. Ocular trauma, post-surgical anisometropia, anisometropia. Because most of these cases occur in one eye, it is best to use contact lenses to correct the vision of one eye, and contact lenses have the best effect of RGP lenses on vision correction and are the healthiest for the eyes. Refractive abnormalities after keratoconus surgery and corneal transplantation. Corneal refractive surgery caused by overcorrection, undercorrection, astigmatism; corneal transplantation caused by the corneal astigmatism, such as the most ideal correction with RGP. Highly irregular astigmatism caused by corneal degenerative diseases such as cone keratoconus and corneal scarring. Moderately severe cone corneas can manifest as irregular astigmatism of the cornea, and only RGP lenses can provide good vision correction for them. Long-term soft lens wearers who experience severe hypoxic reactions or who have giant papillary conjunctivitis and are unable to give up their corneal contact lenses. Many long-term soft lens wearers suffer from long-term corneal hypoxia, and the residue of proteins deposited on the surface of soft lenses is difficult to clean, which can cause eye health problems such as GPC, corneal edge vascular opacification, and serious corneal inflammation and corneal ulcers. These complications are reduced or avoided because of the good oxygen permeability, the lack of protein residue on the lens surface, and the ease of cleaning. Vision correction for amblyopic patients. The use of RGP lenses for the correction of amblyopia found that many amblyopic patients wearing RGP, corrected visual acuity will have different degrees of improvement, especially myopic and astigmatic amblyopia more obvious. The improvement of corrected visual acuity is very important for the treatment of amblyopia, so it is recommended that children with amblyopia over the age of 5 can use RGP lenses for vision correction according to the situation. Adolescent myopia control and treatment. Non-applicable groups for RGP lenses General contact lens contraindications, such as suffering from keratoconjunctival inflammation, pterygium or having other eye pathologies. People who have been in sandy and highly polluted environment for a long time People who are frequently engaged in strenuous sports People with highly sensitive eyes People with severe dry eye syndrome