There are three common types of corneal contact lenses on the market today, the most commonly mentioned being keratoplasty lenses, which are used by children over the age of 8 with low to moderate myopia, worn at night and removed in the morning, with the main advantage of slowing down the development of myopia and eliminating the need to wear glasses during the day, at a price of around 10,000 yuan. There is also a commonly used contact lens is the rigid corneal contact lens, also known as RGP, RGP glasses to wear during the day, the diameter is relatively small, oxygen permeability is better, is currently the first choice for adults to wear contact lenses. The most commonly used on the market is soft corneal contact lenses, this contact lens diameter is larger, softer, the price is lower, but wear a long time will have a lack of oxygen performance, can not be worn for a long time, you can choose different corneal contact lenses according to the situation.