Gas Permeable (GP) or Rigid Gas Permeable (RGP) contact lenses are an alternative to soft contact lenses. Although they are currently less popular than soft lenses, they offer a number of advantages and are continuing to improve as research and technology advance.
GP contacts are made of durable silicone which allows the passage of oxygen through the lens to your cornea and the front surface of your eye – essentially allowing your eye to “breathe”.